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T24 Technical Manual

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1. ID Read the unique identifier ID for this device 3 bytes BINARY 3 bytes Version 53 Read the firmware version FLOAT R Channel 11 Radio Channel UINT8 RW EncKey 15 The radio encryption key to operate on Requires BINARY RW power cycle or Reset to enable Not supported in this 16 Bytes release Power 12 Set or read the output power level 0 100 UINT8 RW Name 10 Set or read a user defined name 11 characters STRING RW 11 Bytes Model 51 Read the model number of the device STRING R 11 Bytes UseCSMA 18 Select whether to use Carrier Sense Multiple Access UINT8 RW techniques on transmission 0 Disabled The Carrier Sense Multiple Access will be disabled NOT RECOMMENDED 1 Enabled The Carrier Sense Multiple Access will be enabled See Unslotted CSMA CA in Appendix A OffDelay 62 Time period in seconds before switching off if no UINT16 RW button is pressed Setting to zero disables Default 5 AutoZero 63 Set or read the value limit which may be automatically FLOAT RW zeroed on startup When the handheld powers up and the input value is within xZeroBand then the display will be zeroed The value of the input will be placed in AutoZero i e from this time onwards until powered off the display will show input value AutoZero DoSleepWake 64 Set or read whether to perform wake and sleep on the UINT8 RW paired device when the handheld is powered up and down D
2. h I A E E amp I b Y N A A 7 mm J gt y N N 1 N E o A x 2 W me 37 Mantracourt Electronics Limited T24 Technical Manual External Antennas The external antennas come in two styles The flat PCB antenna can be mounted inside a plastic housing or to the outside of a metal housing The PCB requires 3mm Clearance on all edges this also applies to the RF window 1 64 mm J E a E b E b 4 S a b y y ld gt 58 mm The bulkhead mounting antenna can be used with metal or plastic housings Care must be taken when mounting the Antenna to ensure the installation does not become directional Mantracourt Electronics Limited T24 Technical Manual 38 T24 IA 4 20mA Current Acquisition Overview The T24 lA is a current acquisition module This allows wireless remote viewing of current information using 2 4GHz radio The T24 IA acquires the current value scales and linearises it to user defined specification and periodically transmits it Between transmissions the device is optionally in a power saving sleep mode to conserve batteries Communications To configure the device you will use the Read and Write mechanisms described in the Data Packet Structures section to rea
3. 0 50 128 255 Operational Usable m Emm ERU En mu n 096 10096 The charts below indicate the operational and usable combinations of RSSI and CV where black is poor and white is good Operational a Usable A 40 10 20 m 20 ie 100 30 BENEEEC Rss so RSSI O o 3 Em pe O JX3 5 T pa 0 lao O a 50 55 60 65 70 75 80 85 90 95100 105110 50 55 60 65 70 75 80 85 90 95 100105110 CV CV Mantracourt Electronics Limited T24 Technical Manual 80 Unslotted CSMA CA Most of the T24 range of devices will allow you to turn off the CSMA Carrier Sense Multiple Access This is recommended to be turned on but in some circumstances turning it off will increase data rate and reduce latency For example a single deice transmits at 200Hz With no other device on this channel CSMA can be disabled giving a more accurate 200Hz transmission CSMA is implemented to reduce the collisions between packets from different devices With CSMA Disabled When a device wants to transmit it checks the channel to see if another device is transmitting If not then the transmission takes place immediately If the channel is busy then the transmission will occur as soon as the channel has been detected as clear With CSMA Enabled When a device wants to transmit it checks the channel to see if another device is transmitting If the channel is busy then we wait until it is clear Now we back off for a
4. opojpoyoljolpjop or ojo Mantracourt Electronics Limited T24 Technical Manual 28 External Antennas The external antennas come in two styles The flat PCB antenna can be mounted inside a plastic housing or to the outside of a metal housing The PCB requires 3mm Clearance on all edges this also applies to the RF window 1 64 mm J E a E b E b 4 S a b y y ld gt 58 mm The bulkhead mounting antenna can be used with metal or plastic housings Care must be taken when mounting the Antenna to ensure the installation does not become directional 29 Mantracourt Electronics Limited T24 Technical Manual T24 VA 0 10V Voltage Acquisition Overview The T24 VA is a voltage acquisition module This allows wireless remote viewing of voltage information using 2 4GHz radio The T24 VA acquires the voltage value scales and linearises it to user defined specification and periodically transmits it Between transmissions the device is optionally in a power saving sleep mode to conserve batteries Communications To configure the device you will use the Read and Write mechanisms described in the Data Packet Structures section to read and write parameters and execute commands Parameter List Parameter Command Description ID Read the unique identifier ID for this device 3 bytes BINARY 3 bytes Vers
5. RmSysZero 121 Reset the system zero settings so values will represent Command the actual inputs NOTE All changes require a SAVE command to enable them to survive through power cycle or RESET command Power Supply Recommend using alkaline AA cells as rechargeable are too low voltage and lithium may not be able to supply the current for the radio to start up Installation There are no specific installation instructions 59 Mantracourt Electronics Limited T24 Technical Manual T24 HR Handheld Reader Roaming Overview The T24 HR is a roaming handheld that can be used to view the reading supplied by an unlimited number of acquisition modules The acquisition Data Tags or IDs do not need to be known beforehand The handheld will automatically wake any device on the same channel and encryption key An internal list is maintained of the top n number of acquisition modules ordered by signal level and a Next key on the handheld allows cycling through this list The list size n is variable between 2 and 20 and this enables the viewing experience to be tailored to particular applications The acquisition modules are identified by their 4 character hexadecimal Data Tags and these may be set using the T24 Toolkit When in communication with a particular acquisition module the LED on that module is activated This provides visual feedback of the selected and currently viewed module The LED output can also appear op
6. instead of a real value UINT16 RW Timeout2 101 Read or write the timeout in milliseconds If the time between receiving data from the device defined as input 2 Set in ValueDataTag2 exceeds this value then the lt V2 gt token and any tokens using this value will result in i instead of a real value UINT16 RW Timeout3 102 Read or write the timeout in milliseconds If the time between receiving data from the device defined as input 3 Set in ValueDataTag3 exceeds this value then the lt V3 gt token and any tokens using this value will result in j instead of a real value UINT16 RW 63 Mantracourt Electronics Limited T24 Technical Manual Timeout4 103 Read or write the timeout in milliseconds If the time between receiving data from the device defined as input 4 Set in ValueDataTag4 exceeds this value then the V4 token and any tokens using this value will result in instead of a real value UINT16 RW Timeout5 104 Read or write the timeout in milliseconds If the time between receiving data from the device defined as input 5 Set in ValueDataTag5 exceeds this value then the V5 token and any tokens using this value will result in instead of a real value UINT16 RW Timeout6 105 Read or write the timeout in milliseconds If the time between receiving data from the device defined as input 6 Set in Val
7. FLOAT RW ScalelnLo 75 Set or read a low input value at which you know what display you require Default 0 FLOAT RW ScalelnHi 77 Set or read a high input value at which you know what display you require Default 1 FLOAT RW ScaleDisplayLo 76 Set or read a low display value for the input value stated in b Default 0 FLOAT RW ScaleDisplayHi 78 Set or read a high display value for the input value stated in ScalelnHi Default 1 FLOAT RW OpMode 122 Selects the operational mode 0 Items Mode Each of the configured input values are displayed one at a time and the Next button can be used to step through them 1 Result Mode The input values are summed and displayed UINT8 RW F1Data 128 Set or read what data to transmit when the F1 key is pressed 0 Always Gross The gross value will be transmitted even if the display shows a zeroed net reading 1 As Displayed The gross or net value will be transmitted depending on what is selected at the time UINT8 RW F1DataTag 127 Set or read the 2 byte Data Tag to use in the Data Provider packet that is transmitted when the F1 key is pressed UINT16 RW ExtZeroDataTag 80 Set or read the 2 byte Data Tag of the Data Provider Packet that will supply a system zero value This value will be subtracted from the gross or net summed
8. measured value at a specified interval and can optionally operate in Low Power Mode where the module enters a temporary deep sleep between transmissions Paused This mode is required when you want to configure or calibrate the module In this mode the module will neither return to deep sleep because of its internal SleepDelay nor will it transmit its Data Provider packets Operation The T24 range of acquisition modules are designed so that once configured they would operate autonomously supplying data to all other modules that require it There would be minimal interaction with the modules and would normally only include sending a module to deep sleep or waking a module from deep sleep Configuration When initially setting up a module the T24 Toolkit is used to connect to a module and allows simple configuration or calibration As can be seen from the 3 operational modes listed above this is not always easy as the module may be asleep or operating in low power mode where communications cannot take place The T24 range of modules support PAIRING This is supported by the T24 Toolkit software and is also available through the documented radio protocol It is initiated by power supply removal and replacement so is not suitable for all occasions such as when the module batteries are not accessible PAIRING has a distinct advantage in that forehand information about the target module is not required PAIRING ensures that the radio channels are m
9. 0 Perform Print 1 Toggle between gross mode and net mode When entering net mode all inputs will be tared UINT8 RW NetMode 136 Set or read the mode of operation Set to true to tare the inputs and enter net mode Set to zero to remove tares and enter gross mode 0 Remove tares and enter gross mode Tare the inputs and enter net mode c UINT8 RW Gross 145 Read the gross sum of all active inputs Equivalent of value generated for GRO token FLOAT Net 146 Read the net sum of all active inputs Equivalent of value generated for NET token FLOAT GrossText 137 Read the set the text used to replace the GN token when in gross mode STRING 10 bytes RW NetText 138 Read the set the text used to replace the GN token when in net mode STRING 10 bytes RW PrintOnError 139 Read the set whether to trigger a Print output when an error first occurs on any of the inputs UINT8 RW Mantracourt Electronics Limited T24 Technical Manual 66 being set a loss of the data would not trigger the Print With this set once the data is lost the output will be triggered and any reference to the input value would appear as This is useful when there is only one input and that input is used to trigger the Print output Without this parameter Do not trigger
10. Note that the above rough guide does not take into account the battery usage as the device periodically wakes from deep sleep to check whether it should wake up properly If the device wake check interval is set to 5 seconds then we can modify the battery life from above by multiplying by a factor of 0 6 We have only calculated the factor for a 5 second wake check interval 3 6 years X 0 6 2 1 years Mantracourt Electronics Limited T24 Technical Manual 26 Accurate Guide The following shows how to more accurately calculate battery life This does rely on an estimate of usable battery capacity which is not as high as manufacturers state their battery capacity to be except for batteries where the cuttoff voltage above the minimum voltage for the device To estimate usable capacity you will need to refer to manufacturers discharge graphs and find a curve closest to around 30mA and estimate the capacity as Amps X Time where time is the point where the battery falls below where the device would be supplied with 2 1V This will be 1 05 in the case of 1 5V cells as we use two in series TXInterval TXInterval Parameter 1000 SampleTime SampleTime Parameter 1000 LoadImp Impedance of strain gauge in Ohms HoursUsage How many hours the device is NOT asleep in a 24 hour period BattAH Usable battery capacity in Amp Hours Ah Wakelnt WakeChkInt parameter FixedMeasurementCurrent 45 Internally the device will adjust SampleTim
11. icoi oocioniioncioniinncicncionciancinncianccnnoda cnn aranea o eaa pa n CREER cdas 14 Mantracourt Electronics Limited T24 Technical Manual OvervieWiiiuscs secede ce RR RR S ARR RR ERR a YR A S Vas 14 Pive e ARDOR 14 Multipoint Base Stations asic esees eee eter dd e E eR d tees 14 COMA IE 15 CACA UII 16 RS 282 e eut ava A v eese tl ete e Vets E te 16 R5485 a tee e elsi ed ebd ie de c E D rA ONE E RAN Rh NA V ERO b AR RN dieu 16 SOMA A OIL LOCIS 16 USB EI e I I MT ri MI M E I M ACRI E e TR ARRAS 17 USB Commu nicatlOns sry RR x RARE id 17 LED Indication 2 I Ra o dades 18 COMMUNICATIONS viciosas e rae ete PER ex De ati he Fak oh Na gea e epe A 0 WE Ne gea a Qe PRS ede eek ei Pea exe ee RE RR S 19 Parameter List i reri rry rhe rery Res VreFRrer ia di tada deidad awed 19 Installation esr E ari ol IA P vt Ye saco vPephre nerepev e eph e ur HE a te 20 SPECICATION 6 05 ci asssvscceatersckinseds cet E ance cnet eset ssneveed seule sceteveset siete weteriel EE S Hy PR ET ERR VES ENS A Uo d 20 F24 SA Strain Acquisition 5 2 222 202 2 2 22 2222009 9 2 0c 20 2202 000022900 000220 00 02e de Re ore oGR i o2 le Re aisis 21 OVerViIeW usce aces ie a ste iet nete Matte veiut ose euet Tuve ite ewe duet aet eie ealad eae alveus d baad wet Vae tad es eoe Tus 21 Gommulnicationi ea eoe reae EI e Ro e REO E EE e CERE NER CU OE EO TER Ee t re C EN EC OE EO ET E 21 Parameter List 2 5 oreet Eyre rey v Shy n VUL
12. 11 characters STRING 11 byte RW Model 51 Read the model number of the device STRING 9 bytes R Mantracourt Electronics Limited T24 Technical Manual 62 UseCSMA 18 Select whether to use Carrier Sense Multiple Access techniques on transmission 0 Disabled The Carrier Sense Multiple Access will be disabled NOT RECOMMENDED 1 Enabled The Carrier Sense Multiple Access will be enabled See Unslotted CSMA CA in Appendix A UINT8 RW Reset 54 Restarts the device and utilises new channel and encryption keys if those have been changed and saved Note after a Reset the device will be asleep Command Save 55 Save any changes made to parameters Required before power cycling or issuing a Reset command Requires 500mS recovery time after executing Command DoPrint 129 Trigger an output Print Note that the outputs will not trigger at a rate faster than the interval set by MinInterval Command DoSySZero 98 Perform a system zero on all devices This will remove the current input values so from this point on the current input will give a value of zero This can be removed by issuing the RmSysZero command Command RmSySZero 99 Reset the system zero settings so values will represent the actual inputs Command Value1 60 Read or write the value used as input 1 which can be represented with the V1 token and is us
13. 4 Binary unprintable Unprintable characters 5 Hex Best represented as hex 6 Bit Map 10110101 Each bit value should be shown 7 Percent Numeric or string value has a value 0 100 0 No content unknown 0 1 UINT8 1 2 UINT16 2 3 INT32 4 4 Float 4 5 String 0 64 6 Binary 0 64 NOTE See Data Type Formats in Appendix A RSSI This indicates the signal strength that this packet was received at See RSSI amp CV in Appendix A CV This indicates correlation value which equates to the quality of the signal when this packet was received See RSSI amp CV in Appendix A NAK This packet is returned if the device receiving the read or write does not recognize the command number Packet Type From ID RSSI CV Packet Type This is Ox8 hex 8 decimal and may have higher bits set which indicate Error Low Battery and Broadcast Mantracourt Electronics Limited T24 Technical Manual From ID This contains the ID of the device that sent the packet RSSI This indicates the signal strength that this packet was received at See RSSI amp CV in Appendix A Cv This indicates correlation value which equates to the quality of the signal when this packet was received See RSSI amp CV in Appendix A TIMEOUT This packet is returned if the device does not respond Packet Type From ID RSSI CV 09 00 00 00 00 00 Packet Type This is Ox9 hex 9 decimal and
14. CV and LQI Packets received from remote devices have RSSI and CV bytes present at the end of the packet RSSI is Received Signal Strength Indication This indicates the strength of the received signal This approximates to dB and can be calculated from the RSSI byte which is stored in 2 s compliment format This value also has an offset of 45 To convert the byte value to RSSI use the following algorithm TS Ro ABE Narn TES SUEZ Then RSS RSS TE i xor OEM RSS RS SI S CV is Correlation Value This indicates the quality of the signal The value of the CV byte 0 255 needs the most significant bit masking off AND with amp H7F where a poor CV is around 55 and a good CV is 110 CVE IAE YEE CV CV AND amp H7F LQI is Link Quality Indication Mantracourt may also refer to Link Quality which is derived from the RSSI and CV values LOI 94 RSSI CV 55 2 3 9 Which gives an operational range of approximately 0 to 255 This operational range covers the extremes of very poor to very good connection quality so we usually take a portion of this to represent the usable range which gives the user a better representation of usable real world quality The LQI range from 50 to 128 can be thought of as to represent 0 100 usable quality This reduced portion of the range represents the usable range and may be represented for example by a signal strength indicator as found on a mobile cell phone
15. OdBm Tx Rx Gr Gain of transmit antenna Gr Gain of receive antenna Figure 1 Calculation of signal power at the receiver input is achieved by summing all the gains and then subtracting the sum of all the losses in this case Signal power at the receiver input Gr Gg Path Loss or 6 70 46 64 46dBm Signal power at the input of the receiver 64 46dBm Note that although the manufacturer s data sheet for the chip antenna gives gain as 3dBi Peak this figure is rarely achieved in practice between 1 and 1 5dBi is more usual 83 Mantracourt Electronics Limited T24 Technical Manual Example 3 In practice the radios would be fitted inside enclosures and the antenna may be either inside the enclosure or mounted some distance from the radio and connected to it by an extended feeder A practical example of this type is illustrated at Figure 2 below G ns T 6 0dB 4 5dB 80m Pc PA e a Path loss 70 46dB EN i OdB i l i TE i i Rx i Feeder i loss i 1 5dB Enclosure Loss Gy Gain of transmit antenna 6dB Gr Gain of receive antenna Figure 2 Sum of the gains Gr Gs or 4 5 6 0 10 5 Sum of the losses Feeder Loss Path Loss Enclosure Loss or 1 5 70 46 6 0 77 96 Signal strength at the receiver input is 10 5 77 96 67 46dBm Refer to Table 1 below that relates receiver input power to RSSI an input level of 67 46dBm will give
16. The RS232 interface uses TX RX and GND to connect to a PC PLC etc and uses standard RS232 voltage levels Handshaking None Data Size 8 bits Stop Bits 1 bit Parity None The baudrate can be selected by setting the DIP switches stated above NOTE the base station will require power cycling to utilise a baudrate change Example connection to a PC 9 way D serial connector PC 9 Way D Plug Pin Signal Base Station Connection Direction 3 TX gt RX J6 Pin 2 or J7 Pin 3 2 RX lt TX J6 Pin 3 or J7 Pin 2 5 Gnd GND J6 Pin 4 or J7 Pin 5 8 CTS CTS J6 Pin 1 or J7 Pin 8 RS485 The RS485 interface This is a 2 wire 485 interface and will not work with 4 wire 485 buses uses TX RX and GND to connect to a PC PLC etc and uses standard RS485 voltage levels Handshaking None Data Size 8 bits Stop Bits 1 bit Parity None The baudrate can be selected by setting the DIP switches stated above NOTE the base station will require power cycling to utilise a baudrate change Example connection Depending on the RS485 interface or hardware the connections vary and are not standard therefore we can only show the connections to the base station You must refer to the user manual regarding your RS485 connection to ascertain the correct connections PC PLC Connection Signal Base Station Connection Direction Refer to RS485 Device User Manual A J4 Pin 3 or J5 Pin 3 Refer to RS485 Device User Manual B J4
17. 1 DataTag 0 2 255 StayAwake BroadcastStayAwake Sleep Use SleepByDataTag DataTag or SleepBroadcastByDataTag or RemoteWrite BaseStation ID SleepCommand Documentation for specific drivers supplied by Mantracourt will be included with the actual drivers which are available on the T24 Resource CD This includes Windows DLL Windows COM driver Windows CE DLL and Windows CE Dot Net Assembly 77 Mantracourt Electronics Limited T24 Technical Manual Data Type Formats The following data formats are used when communicating with the base station These formats apply to the raw data in the packets and also to the data parts of the Mantracourt supplied T24drv dll driver Value Data Type Number Of Bytes Example Notes 1 UINT8 1 01 2 UINT16 2 00 01 MSB First 3 INT32 4 00 00 00 01 MSB First 4 Float 4 3F 80 00 00 See Floating Point IEEE 5 String 0 64 Hello World 6 Binary 0 64 S95 amp UINT8 Represents an unsigned numeric value from O to 255 and consists of a single byte Byte 7 6 5 4 3 2 1 0 UINT16 Represents an unsigned numeric value from 0 to 65535 and consists of 2 bytes The bytes are in order of significance MSB first MSByte LSByte 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 INT32 Represents a signed numeric value from 2 147 483 648 to positive 2 147 483 647 and consists o
18. A Saft LSH20 D Recommend T24 PSSA module as these cells usually have a high internal resistance These can be found at 1 5 Volts and can therefore be a direct replacement for Alkaline cells The low internal resistance and high capacity make these batteries an ideal choice Example Energizer L91 These generally start at 3 7V and exceed the maximum allowable voltage These are usable if a regulator and charging circuit can be installed between the T24 SA and the battery Care must be taken here that the regulator does not draw too much current when idle so that the low power modes are not compromised Recommend T24 PSSB module In line Battery Modules Capacitor Module T24 PSSA This is used for batteries which have an internal resistance of greater than 150mOhms overcoming voltage drops during high current phases of the low power mode cycle This problem becomes apparent when attempting to communicate with a T24 SA using the T24 Toolkit or power cycling when the battery is near the end of its life In normal operation Low power mode with a handheld T24 HS where the T24 SA is connected to an uninterrupted battery this module is generally not required Using lower impedance strain gauges or multiple parallel strain gauges exacerbates this problem Consult Sales for details Alternatively fit an electrolytic capacitor across battery of 2000uF or greater This capacitor should be of low ESR 70mOhms Lithium lon Polymer Module T
19. Consult Sales for details Alternatively fit an electrolytic capacitor across battery of 2000uF or greater This capacitor should be of low ESR 70mOhms Lithium lon Polymer Module T24 PSSB Provides a means of charging the Lithium lon or Polymer battery from a nominal 5V DC supply and also providing a low quiescent current 3 3V regulator to supply the T24 SA This overcomes the max voltage limitation of the T24 SA and the higher cell voltage and charging requirements of the Lithium lon cell Mantracourt Electronics Limited T24 Technical Manual 42 Battery Life Rough Guide As a rough guide battery life of a T24 SA connected to a 1K load cell with a 5 millisecond sample time is as follows Years Usable Battery Capacity 10 TX per second Example of 2 X AA GP 15A with a usable capacity of 1 9Ah The loadcell is 1K and the transmission rate is 3Hz with a 5 millisecond sample time Years LoS Years 0 063 23 1 days 43 Mantracourt Electronics Limited T24 Technical Manual As can be seen below from an actual measured device on continuously this rough calculation is quite close 32 2 X AA Alkaline Battery Discharge 3Hz Power Save p Mode E 0 12 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 It must be remembered that this calculation is for when the device is continuously on and not sent to deep sleep So if the above device was used with a handheld and
20. E a E b E b 4 S a b y y ld gt 58 mm The bulkhead mounting antenna can be used with metal or plastic housings Care must be taken when mounting the Antenna to ensure the installation does not become directional 51 Mantracourt Electronics Limited T24 Technical Manual T24 HS Handheld Reader Simple Overview The T24 HS captures Data Provider data and displays it The T24 HS also performs the function of waking the remote device when it is turned on and sending it to deep sleep mode when it is turned off If no buttons are pressed on the T24 HS it will turn off after 5 minutes Communications To configure the device you will use the Read and Write mechanisms described in the Data Packet Structures section to read and write parameters and execute commands Parameter List Parameter Command Description Native Data Read Write Type ID 3 Read the unique identifier ID for this device 3 bytes BINARY 3 R bytes Version 53 Read the firmware version FLOAT R Channel 11 Radio Channel UINT8 RW EncKey 15 The radio encryption key to operate on Requires BINARY RW power cycle or Reset to enable Not supported in this 16 Bytes release Power 12 Set or read the output power level UINT8 RW range 0 to 100 default 100 Name 10 Set or read a user defined name 11 characters STRING RW 11 Bytes Model 51 Read
21. IRE EV ONPA ERE C PO EE A rei ES AA 33 In line Battery Modules eio cee ere d ee eon e rra e nega n e rea ene Rd er Ed ewe pev sre Ed eee ego weed 33 Battery Lifez ioo ro reto A Ai 34 Roush CU cierre IR ERR SERERE AAA REN RAV ACE EN ne ERU EE ENS VERSES TAa UR d ER qs 34 Accurate G ide use eU ERES A a Oa Ua ens SEE TR VE S EPESN C 36 Installatiorz Y 37 Anitennas cci dee eT E e EI ODU e ende ups EA doi 37 Internal Chip Antennas ise sdoee ordern ee Und eP EROR ddvesdendens doe oen C QURF EAR Oen en ehe E eR C Ceo 37 External ANMAT 38 T24 IA 4 20mA Current Acquisition Leeeeeeeeeeeeeee eene eene enhn heh nennen hee eet hethseereerne 39 OVE MIE W 8 obs PUE 39 Communications 2 A a et ve eU NR S Ue eR S RE CES 39 Parameter List e arre rex EYE as 39 Data Provider Format aoa xn ods A dadas 41 Measurement Resolution o ey ea AA PEERS Pe E a NEST 41 Power SUPPLY siio Fes sie ete enne Fe ana o 41 Battery TyDES TTD 42 In line Battery Modules serere rere ero th tere rho eor e de let ne win gio De ea atadas 42 Battery ii A De wedi ee 43 ROUGH AEE a E a a ong IO A A sitet ever A O A o seated 43 Accurate GUIA de 45 Installation nai iia 46 ANTENAS iii a 46 Internal Chip Antenna eoi cote RARE ERES EOE SIE ESSE ER PE IAEE EEEE dr Su ER PR SEARS 46 External Antennas isses cep Ir Y a RATSNR RI REN RR RE VANSURESTA NS ERES E NER Ua oa tweed Y VAN RES EEE E C EU edMR Y 47
22. Off Off Off Off 2 On Off Off Off 3 Off On Off Off 4 On On Off Off 5 Off Off On Off 6 On Off On Off 7 Off On On Off 8 On On On Off 9 Off Off Off On 10 On Off Off On 11 Off On Off On 12 On On Off On 13 Off Off On On 14 On Off On On 15 Off On On On 16 On On On On Switch positions 5 to 7 set whether serial or USB is used If USB is not selected then the chosen switch settings control the baudrate for the serial interface Whether the serial interface is RS485 or RS232 is selected by switch position 8 Baudrate USB USB Off Off Off 9600 On Off Off 19200 Off On Off 38400 On On Off 57600 Off Off On 115200 On Off On 230400 Off On On 460800 On On On NOTE A baudrate of 9600 and in some cases 19200 is not suitable for 2 way communication with remote devices as it is too slow and causes timeouts This baudrate has been included to enable the base station to be connected to a 9600 baud device to allow low rate Data Provider packets to be received At any rate below 230400 is may be possible to lose packets at high data rates as the serial cannot keep pace with the radio transmissions If USB is not selected as the interface Switch positions 5 to 7 then this switch position selects whether the serial interface is RS232 or RS485 232 485 RS232 Off RS485 On 15 Mantracourt Electronics Limited T24 Technical Manual Interfaces RS232
23. Pin 4 or J5 Pin 4 Refer to RS485 Device User Manual GND J4 Pin 5 or J5 Pin 5 NOTE There are two connectors for RS485 J4 and J5 This is to facilitate easy daisy chaining of devices if required Serial Limitations e When using RS232 or RS485 you should use the fastest baudrate possible At lower rates data can be lost because it can arrive from the radio faster than the base station can send it serially e At 9600 baud you will experience communications problems when configuring devices This baudrate is too slow for anything other than monitoring data provider packets from devices and even then these should be at a low rate around 20 per second The slow baudrates are provided to get low rate data into older systems e RS485 is a bus master system and is not ideally suited to full communications with devices when multiple devices are providing data This is fine for the normal operation of data acquisition but it is recommended that only the device to be configured is active during configuration Mantracourt Electronics Limited T24 Technical Manual 16 USB Connection to the base station will be either a captive USB cable T24 BSu or a USB socket B for connection using a standard USB A B cable T24 BSi There is an optional cable assembly for the T24 BSi to provide for a USB connection while the device is still fitted to the ABS case To communicate with the base station the connected device must use the USB HID Device C
24. Power and RSSI Relationship During development of the Rad24 radio it was necessary to understand the relationship between signal power at the receiver input and the indicated RSSI figure A calibrated signal source was used to set RSSI readings at intervals of 10 and the corresponding input levels recorded at each step Figures in italics were not measured but extrapolated from the measured values dBm Value 7 10 17 20 28 5 30 36 5 40 44 5 50 54 60 64 70 74 80 79 85 84 90 Mantracourt Electronics Limited T24 Technical Manual 86 Path Loss at 2 4GHz Free Space Path Loss in dB 32 4 20Log19 d Where d Free space path length in metres Path length Path length Path length Path length metres metres metres metres 46 37 69 30 135 75 00 200 78 42 10 52 40 75 69 90 140 75 32 205 78 63 15 55 92 80 70 46 145 75 62 210 78 84 20 58 42 85 70 98 150 75 92 215 79 04 25 60 35 90 71 48 155 76 20 220 79 24 30 61 94 95 71 95 160 76 48 225 79 44 35 63 28 100 72 40 165 76 74 230 79 63 40 64 44 105 72 82 170 77 00 235 79 82 45 65 46 110 73 22 175 77 26 240 80 00 50 66 37 115 73 61 180 77 50 245 80 18 55 67 20 120 73 98 185 77 74 250 80 35 60 67 96 125 74 33 190 77 97 255 80 53 65 68 65 130 74 67 195 78 20 260 80 69 These figures are for free space path loss only when estimating signal power at the receiver inpu
25. RF exposure Article 3 1 of Directive 2004 40 EC of the European Parliament and of the Council dated 29 April 2004 The Physical Agents Directive gives an Exposure limit for Whole Body Average SAR as 400mW Kg Rad24 Peak ERP is not more than 4mW assuming a 6dB antenna Mantracourt Electronics Limited T24 Technical Manual 88 Appendix C Customising T24 Toolkit Some customers re badge the Mantracourt instrumentation and this section explains how to ship a custom version of the T24 Toolkit with custom model names images and descriptions To construct a customised setup the customer will need to create a sub folder named Custom in the folder where the setup exe file is located In this Custom folder you will need to have a file named config ini and optionally a set of images in JPG or GIF format The config ini file has the following structure Alias OriginalModelName NewModelNam Description OriginalModelName NewDescription Image OriginalModelName ImageFilename The OriginalModelName is the model that the T24 Toolkit displays without any customisation The following example shows how to customise a T24 SA to make it appear to be a SGD 990 and have a description of SGD 990 Force Measurement Device This will also display a custom image on the toolkit Info page Alias T24 SA SGD 990 Description T24 SA SGD 990 Force Measurement Device Image T24 SA SGDImage jpg The customised installati
26. T24 PSSA module to maximise usable capacity Lithium cells can be used but note that the maximum voltage is 3 6 Volts Select a cell with low internal resistance Example Saft LS17500 A Saft LSH20 D Recommend T24 PSSA module as these cells usually have a high internal resistance These can be found at 1 5 Volts and can therefore be a direct replacement for Alkaline cells The low internal resistance and high capacity make these batteries an ideal choice Example Energizer L91 These generally start at 3 7V and exceed the maximum allowable voltage These are usable if a regulator and charging circuit can be installed between the T24 SA and the battery Care must be taken here that the regulator does not draw too much current when idle so that the low power modes are not compromised Recommend T24 PSSB module In line Battery Modules Capacitor Module T24 PSSA This is used for batteries which have an internal resistance of greater than 150mOhms overcoming voltage drops during high current phases of the low power mode cycle This problem becomes apparent when attempting to communicate with a T24 SA using the T24 Toolkit or power cycling when the battery is near the end of its life In normal operation Low power mode with a handheld T24 HS where the T24 SA is connected to an uninterrupted battery this module is generally not required Using lower impedance strain gauges or multiple parallel strain gauges exacerbates this problem
27. TE DO EET TE UT IT deena ecules nd POO EE U PROF UC E ERAN UT EE 21 Data Provider Format sessies resnica e a RR A A VANS RR TAY VASE ENTRAR ENGQER CIV SMS TENER Ys 23 Meas rement Resolution ae e a E E RR eV NR ERR SRN SR VE S EE SN VASA ey sete A UA o ege Nar 23 Power SUPPI cerisa tuaa causae ra HG E E ARES ds taal E TER os lid 23 Battery Mio 24 In line Battery Mod les incedere s ciate see nee eoru AAA LER UR TERN de S her dean diei aie 24 Battery Leia eere ree ca doce Lee reed que eee evene A voee see see vex ope ede Ve eue s 25 Derniers 25 Accurate GUIA o EST Te eve ere cet aee MAA ha AA 27 Installation zs NER E E M Imi E aie te riv e E i ed a Eee e a T i iv 27 ANRONINAS STI E T ILI LL LIU 27 Internal Chip Antena ceo ep C ep teh siege ER ERR EARN EK heehee NER CORRER EUER ERE PUN EE TR E NEUS 27 External Antennas aes sic sc eI ve an Raya da 29 T24 VA 0 10V Voltage Acquisition eeeeeeeeeeeee eene nennen he nennen hehehe ether rne 30 BL JAA UCM PPP 30 Communications eir Er ea En bad o UN t ad v rn baa o UE we bad cleo eS Od Ree ge NEA OES 30 Parameter List an e ii 30 Data Provider Formati i ie deter eel dd tds 32 Measurement Resolution ovas trai o 32 Power Supplyu 3 4 ex ute ce utc ots Pee e ve er eoe Pede e vais vo vats ved e aex eue v osx Pede ex Vota eo gerat ede eot Voss vod vod 32 Battery Types accen A A ER EET
28. TXInterval Parameter 1000 SampleTime SampleTime Parameter 1000 HoursUsage How many hours the device is NOT asleep in a 24 hour period BattAH Usable battery capacity in Amp Hours Ah Wakelnt WakeChkInt parameter FixedMeasurementCurrent 45 Internally the device will adjust SampleTime if it is too long for the TXInterval so we need to take this into account for our calculations If SampleTime 0 025 gt TXInterval then we need to make SampleTime TXInterval 0 025 Also note that we cannot use a TXInterval of less than 0 041 if we are in low power mode as this will cause unpredictable results If in Low Power Mode fixed block U1 0 5 TXInterval 1 Measurement block U2 FixedMeasurementCurrent TXInterval 0 006 fixed block U3 FixedMeasurementCurrent TXInterval SampleTime AwakeCurrent U1 U2 U3 HoursUsage 24 If not in Low Power Mode AwakeCurrent FixedMeasurementCurrent HoursUsage 24 Calculate currents Now calculate sleep current SleepCurrent 30 WakeInt 0 008 SleepCurrent SleepCurrent 24 HoursUsage 24 Calculate total current TotalCurrent AwakeCurrent SleepCurrent Calculate battery life in hours BattHours BattAH TotalCurrent 1000 Allow a safety margin BattHours BattHours 0 9 The calculated battery life in hours is BattHours 45 Mantracourt Electronics Limited T24 Technical Manual Installation Antennas Internal Chi
29. Tag to watch for that will reset SleepDelay UINT16 RW timer DoSystemZeroTrigger 125 Enter Data Tag to watch for that will reset SleepDelay UINT16 RW timer NOTE All changes require a SAVE command to enable them to survive through power cycle or RESET command Data Provider Format At every TXInterval a Data Provider packet is transmitted that holds 1 value in FLOAT format See Appendix A Data Tag Data Type Base Station Value1 OB OB 01 23 C6 FO 10 04 45 69 EB BE ES EC OF A3 cy Length Status RSSI Packet Type Checksum Measurement Resolution The noise free resolution is dependant on the Sample Time SampleTime SampleTime mS Noise Free Resolution Ratio gt 0 15 5 bits 1 50 000 gt 9 16 bits 1 65 000 gt 49 17 25 bits 1 150 000 gt 99 18 bits 1 250 000 gt 999 18 75 bits 1 400 000 Power Supply Attach power supply wiring to the module as shown below 23 Mantracourt Electronics Limited T24 Technical Manual 3V Supply Y OV Supply o Connect to a 3 Volt power supply or batteries WARNING This module is not reverse polarity protected WARNING The maximum voltage is 3 6V Battery Types Battery Type Alkaline Zn MnO Nickel Metal Hydride NiMh Nickel Cadmium NiCad Lithium Primary 3 6V Li SOCL Lithium Iron Disulphide Li F
30. These parameters take text into which you can insert tokens When a Print is generated these lines are parsed and tokens replaced with the values they represent and the resulting data sent to the serial port A Print is generated by either issuing a DoPrint command activating switch input when SwitchMode is set to zero or by receiving a Data Provider packet whose Data Tag matches the PrintDataTag parameter When a Print is executed each of the parameters Line1 to Line 20 will be parsed Every token will be evaluated and replaced with the live value The data from all 20 lines will be sent to the serial port with a delay of LineDelay milliseconds after each occurrence of the user line delay character Communications To configure the device you will use the Read and Write mechanisms described in the Data Packet Structures section to read and write parameters and execute commands Parameter List Parameter Command Description Native Data R W Type ID 3 Read the unique identifier ID for this device 3 bytes BINARY 3 byte R Version 53 Read the firmware version FLOAT R Channel 11 The radio channel to operate on 1 16 Requires power UINT8 RW cycle or Reset to enable EncKey 15 The radio encryption key to operate on Requires power BINARY 16 byte RW cycle or Reset to enable 16 bytes Not supported in this release Power 12 Set or read the output power level 0 100 UINT8 RW Name 10 Set or read a user defined name
31. as input 1 This will be stored in Value 1 and is available to the token V1 and the summing tokens GRO and NET Leave as 0x00 to disable Line1 69 Read or set the data for line 1 of the serial output You can STRING 32 RW include text or tokens bytes Line2 70 Read or set the data for line 2 of the serial output You can STRING 32 RW include text or tokens bytes Line3 71 Read or set the data for line 3 of the serial output You can STRING 32 RW include text or tokens bytes Line4 72 Read or set the data for line 4 of the serial output You can STRING 32 RW include text or tokens bytes Line5 73 Read or set the data for line 5 of the serial output You can STRING 32 RW include text or tokens bytes Line6 74 Read or set the data for line 6 of the serial output You can STRING 32 RW include text or tokens bytes Line7 75 Read or set the data for line 7 of the serial output You can STRING 32 RW include text or tokens bytes Line8 76 Read or set the data for line 8 of the serial output You can STRING 32 RW include text or tokens bytes Line9 77 Read or set the data for line 9 of the serial output You can STRING 32 RW include text or tokens bytes Line10 78 Read or set the data for line 10 of the serial output You STRING 32 RW can include text or tokens bytes Line11 79 Read or set the data for line 11 of the serial output You STRING 32 RW can include text or tokens bytes Line12 80 Read or set the data for
32. calibration point FLOAT RW CalPointGain 90 The gain to apply to the input at this calibration point FLOAT RW CalPointGain 91 The gain to apply to the input at this calibration point FLOAT RW CalPointGain 92 The gain to apply to the input at this calibration point FLOAT RW CalPointGain 93 The gain to apply to the input at this calibration point FLOAT RW CalPointGain 94 The gain to apply to the input at this calibration point FLOAT RW CalPointGain 95 The gain to apply to the input at this calibration point FLOAT RW CalPointGain 96 The gain to apply to the input at this calibration point FLOAT RW CalPointGain 97 The gain to apply to the input at this calibration point FLOAT RW CalPointOffset1 98 The offset to apply to the input at this calibration FLOAT RW point CalPointOffset2 99 The offset to apply to the input at this calibration FLOAT RW point CalPointOffset3 100 The offset to apply to the input at this calibration FLOAT RW point CalPointOffset4 101 The offset to apply to the input at this calibration FLOAT RW point CalPointOffset5 102 The offset to apply to the input at this calibration FLOAT RW point CalPointOffset6 103 The offset to apply to the input at this calibration FLOAT RW point CalPointOffset7 104 The offset to apply to the input at this calibration FLOAT RW point CalPointOffset8 105 The offset to apply to the input at this calibration FLOAT RW point CalPointOffset9 106 The offset to apply to the input a
33. cause undesired operation CAUTION If the device is changed or modified without permission from Mantracourt Electronics Ltd the user may void his or her authority to operate the equipment Industry Canada Industry Industrie E Canada Canada Models i and e for internal and external antenna variants For antenna T24 ANTA and T24 ANTB IC 7224A RAD24 This apparatus complies with RSS 210 Low power Licence exempt Radiocommunication Devices All Frequency Bands Category Equipment RSS Mantracourt Electronics Limited T24 Technical Manual 90 OEM Reseller Marking and Documentation Requirements FCC The Original Equipment Manufacturer OEM must ensure that FCC labelling requirements are met This includes a clearly visible label on the outside of the final product enclosure that displays the contents as shown Contains FCC ID VHARAD24 This device complies with Part 15 of the FCC Rules Operation is subject to the following two conditions 1 this device may not cause harmful interference and 2 this device must accept any interference received including interference that may cause undesired operation The T24 SAe device has been tested with T24 ANTA and T24 ANTB When integrated in OEM products fixed antennas require installation preventing end users from replacing them with non approved antennas Antennas other than T24 ANTA and T24 ANTB must be tested to comply with FCC Section 15 203 unique antenna connectors and Sect
34. copy of the T24 device user manual documentation and ensure the final product does not exceed the specified power ratings antenna specifications and or installation requirements as specified in the user manual If any of these specifications are exceeded in the final product a submission must be made to a notified body for compliance testing to all required standards OEM Labelling Requirements The CE marking must be affixed to a visible location on the OEM product CE The CE mark shall consist of the initials CE taking the following form W f the CE marking is reduced or enlarged the proportions given in the above graduated drawing must be respected W The CE marking must have a height of at least 5mm except where this is not possible on account of the nature of the apparatus WB The CE marking must be affixed visibly legibly and indelibly 91 Mantracourt Electronics Limited T24 Technical Manual Worldwide Regional Approvals Region Product Conforms To Europe CE USA FCC Canada IC Australia To Be Determined China To Be Determined Japan To Be Determined Important Note Mantracourt does not list the entire set of standards that must be met for each country Mantracourt customers assume full responsibility for learning and meeting the required guidelines for each country in their distribution market For more information relating to European compliance of an OEM product incorporating the T24 ran
35. mode ResumeTrigger 123 Enter Data Tag to watch for that will trigger resume UINT16 RW mode StayAwakeTrigger 122 Enter Data Tag to watch for that will reset SleepDelay UINT16 RW timer DoSystemZeroTrigger 125 Enter Data Tag to watch for that will reset SleepDelay UINT16 RW timer NOTE All changes require a SAVE command to enable them to survive through power cycle or RESET command Data Provider Format At every TXInterval a Data Provider packet is transmitted that holds 1 value in FLOAT format See Appendix A Data Tag Data Type Base Station Value1 OB OB 01 23 C6 FO 10 04 45 69 EB BE E9 EC OF A3 cy Length Status RSSI Packet Type Checksum Measurement Resolution The noise free resolution is dependant on the Sample Time SampleTime SampleTime mS Noise Free Resolution Ratio gt 0 15 5 bits 1 50 000 gt 9 16 bits 1 65 000 gt 49 17 25 bits 1 150 000 gt 99 18 bits 1 250 000 gt 999 18 75 bits 1 400 000 Power Supply Attach power supply wiring to the module as shown below olololollolo O O OC 3V Supply N OV Supply o Connect to a 3 Volt power supply or batteries WARNING This module is not reverse polarity protected Mantracourt Electronics Limited T24 Technical Manual 32 WARNING The maximum voltage is 3 6V B
36. random period The first time we back off one of the following periods is randomly selected 320uS 640uS 960uS If the channel is now clear then the transmission takes place If the channel is busy then a new random backoff period is selected from the following 320uS 640uS 960uS 1 28mS 1 600mS 1 920mS 2 240mS If the channel is now clear then the transmission takes place If the channel is busy then a new random backoff period is selected from the wider range and the procedure repeated Certain packets are transmitted as if CSMA is disabled regardless of the device setting These include the sleep wake packets and responses to requests Data Tag Control Interface Advanced When acquisition devices are operating in low power mode it is not easy to communicate using the full read write packets as most of the time the device is asleep Also in some cases the consumer of the data only knows the Data Tag from the Data Provider packet and does not know the ID of the sender Therefore we need to utilise a control interface within the Data Provider packet scheme whereby devices such as a handheld can perform rudimentary control on another device while knowing no more than that devices default Data Tag Each device supplying data to a consumer only has one defined default data tag We reuse that tag to enable communicating back to the data provider This will not affect other consumers o
37. sink 5 4 to 20mA sink 6 0 to 20mA source 7 4 to 20mA source ErrorState 61 Read the current error state Each bit value represents a UINT8 R different state 1 Timeout 2 Remote Error 4 Remote Battery 8 Scaling Error Value 62 Read the current input value FLOAT R InMin 100 The input value at which the output will be at 0 FLOAT RW InMax 101 The input value at which the output will be at 100 FLOAT RW Timeout 102 The time allowed between data arrivals greater than which INT32 RW will trigger the TimeOutAction TimeoutAction 103 Select the action to trigger when data does not arrive for UINT8 RW the Timeout period 0 None 1 Minimum Full Scale 2 Maximum Full Scale 3 Minimum Output 4 Maximum Output 5 Half Full Scale 6 Hold Last Output RemoteErrAction 104 Select the action to trigger when the remote device UINT8 RW reports an error 0 None 1 Minimum Full Scale 2 Maximum Full Scale 3 Minimum Output 4 Maximum Output 5 Half Full Scale 6 Hold Last Output Mantracourt Electronics Limited T24 Technical Manual 72 RemoteBattAction 105 Select the action to trigger when the remote device UINT8 RW reports low battery 0 None 1 Minimum Full Scale 2 Maximum Full Scale 3 Minimum Output 4 Maximum Output 5 Half Full Scale 6 Hold Last Output Smoothing 106 Select whether to smooth the output When activated this UINT8 RW will result in a latency of the interval between da
38. station Where W Length bytes are identical and contain the length of just the Data Packet section W The CRC bytes are CRC 16 values of all bytes from Length up to and including Data section W Base Address is the address of the base station used where multiple base stations are deployed Base station addresses can range from 1 to 16 and is set by DIP switches on the base station NOTE The T24 BSU is fixed at address 1 W The Packet Type byte defines the packet type thus defining the Data Packet Structure In received packets this byte also indicates Error Low Battery and Broadcast status Handling Base Station Data The packets arriving at the base station serial or USB port are not handshaken Data may arrive as a partial packet or many packets may arrive together Therefore the recommended best practice to handle data is to place arriving data into a circular buffer and to detect the packets from this buffer by looking for a length byte pair Then look forward in the buffer at the CRC position if the buffer contains enough bytes and check whether the CRC is valid If so you can extract and use the packet If not then advance the start of the circular buffer until you find a matching byte pair then check for a valid CRC again CRC The CRC algorithm is identical to that used in Modbus communications and should be calculated for outgoing packets and checked on incoming packets The following BASIC example is of a function that will calculat
39. values This allows the same handheld to be used with different sets of data providers each supplying its own system zero value UINT16 RW ExtZerolD 100 Set or read the ID of the device acting as external system zero BINARY 3 Bytes RW MotionBand 123 Specify an engineering units band that the readings must stay within for the duration of the MotionTime for the reading to be considered steady FLOAT RW MotionTime 124 Specify the duration in seconds for the motion detection to operate UINT8 RW MsgDuration 125 Specifies the duration in milliseconds that messages are displayed i e the message that shows Input 1 or Input 2 as items are selected UINT16 RW ItemDuration 126 Specifies the duration in seconds that individual item UINT8 RW 57 Mantracourt Electronics Limited T24 Technical Manual values are displayed in Result mode before automatically switching back to display the sum ValueDataTag1 81 Set or read the 2 byte Data Tag that is used to match a UINT16 RW Data Provider packet to use as the input value 1 ValuelD1 101 Set or read the ID of the device acting as input 1 Used BINARY 3 RW to wake the remote device when Wake key pressed in Bytes Items Mode ValueDataTag2 82 Set or read the 2 byte Data Tag that is used to match a UI
40. woken up 5 times a day for 5 minutes each time the total usage in a 24 hour period would be B X 5 e 5 mias c 0 216 laws So we are only using a fraction of the daily 24 hours so battery life will be 24 0 416 times the continuously on life i e DA y ai S7 So SUSO X DS ceys 15350156 CES Or 44 3 months Ois Over 3 and a half years Note that the above rough guide does not take into account the battery usage as the device periodically wakes from deep sleep to check whether it should wake up properly If the device wake check interval is set to 5 seconds then we can modify the battery life from above by multiplying by a factor of 0 6 We have only calculated the factor for a 5 second wake check interval 3 6 years X 0 6 2 1 years Mantracourt Electronics Limited T24 Technical Manual 44 Accurate Guide The following shows how to more accurately calculate battery life This does rely on an estimate of usable battery capacity which is not as high as manufacturers state their battery capacity to be except for batteries where the cuttoff voltage above the minimum voltage for the device To estimate usable capacity you will need to refer to manufacturers discharge graphs and find a curve closest to around 30mA and estimate the capacity as Amps X Time where time is the point where the battery falls below where the device would be supplied with 2 1V This will be 1 05 in the case of 1 5V cells as we use two in series TXInterval
41. 0 Packet Type This is Ox7 hex 7 decimal and may have higher bits set which indicate Error Low Battery and Broadcast From ID This contains the ID of the device that sent the packet RSSI This indicates the signal strength that this packet was received at See RSSI amp CV in Appendix A CV This indicates correlation value which equates to the quality of the signal when this packet was received See RSSI amp CV in Appendix A If the ACK is in response to a READ then it will contain data Packet Type FromID Data Type Data RSSI CV 07 00100 00 00 00 00 9 Mantracourt Electronics Limited T24 Technical Manual Packet Type This is Ox7 hex 7 decimal and may have higher bits set which indicate Error Low Battery and Broadcast From ID This contains the ID of the device that sent the packet Data Type This byte defines how the data is formatted in this packet and also indicates the best way to represent the data Function Display As Data Type Bit 7 6 5 4 3 2 1 0 Sample 0 1 1 1 1 0 0 1 0 Undefined 1 Numeric Numeric representation based on Data Type 2 Boolean The data may be in any format but represents a boolean result where non zero numeric is True and string length gt 1 or gt 0 is True 3 Text Can display as ASCII text
42. 24 PSSB Provides a means of charging the Lithium lon or Polymer battery from a nominal 5V DC supply and also providing a low quiescent current 3 3V regulator to supply the T24 SA This overcomes the max voltage limitation of the T24 SA and the higher cell voltage and charging requirements of the Lithium lon cell 33 Mantracourt Electronics Limited T24 Technical Manual Battery Life Rough Guide As a rough guide battery life of a T24 SA connected to a 1K load cell with a 5 millisecond sample time is as follows Years Usable Battery Capacity 10 TX per second Example of 2 X AA GP 15A with a usable capacity of 1 9Ah The loadcell is 1K and the transmission rate is 3Hz with a 5 millisecond sample time Years LoS Years 0 063 23 1 days Mantracourt Electronics Limited T24 Technical Manual 34 As can be seen below from an actual measured device on continuously this rough calculation is quite close 32 2 X AA Alkaline Battery Discharge 3Hz Power Save p Mode E 0 12 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 It must be remembered that this calculation is for when the device is continuously on and not sent to deep sleep So if the above device was used with a handheld and woken up 5 times a day for 5 minutes each time the total usage in a 24 hour period would be B X 5 e 5 mias c 0 216 laws So we are only using a fraction of the daily 24 hours so batter
43. 4 The offset to apply to the input at this calibration FLOAT RW point CalPointOffset8 105 The offset to apply to the input at this calibration FLOAT RW point CalPointOffset9 106 The offset to apply to the input at this calibration FLOAT RW point Value 72 Reads the user calibrated output FLOAT R Counts 70 Raw A D counts INT32 R PFS 71 Factory calibrated percent full scale 0 0V 100 10V FLOAT R DigitalOut 108 Read or set the digital output state FLOAT RW 0 Turn digital output off 1 Turn digital output on 2 Make digital output mirror the LED state V1 05 and later Status 74 Live status where the bit values indicate status The following table shows the decimal bit values and their meaning 1 STATUS SHUNT CAL 2 STATUS INPUT INTEGRITY 4 Reserved 8 Reserved 16 STATUS POWER UP 32 STATUS BATT LOW 64 STATUS DIGITAL INPUT 128 STATUS DIGITAL OUTPUT Reset 54 Restarts the device and utilises new channel and Command encryption keys if those have been changed and saved Mantracourt Electronics Limited T24 Technical Manual 40 Save 55 Save any changes made to parameters Required Command before power cycling or issuing a Reset command Requires 500mS recovery time after executing Wake 50 Wake the module from sleep Command Sleep 56 Sends the module to Sleep Command Pause 57 Stops the output streaming to allow configuration Command Resume 59 Streaming continues Command StayAwake 58 No function other than
44. 92 The gain to apply to the input at this calibration point FLOAT RW CalPointGain 93 The gain to apply to the input at this calibration point FLOAT RW CalPointGain 94 The gain to apply to the input at this calibration point FLOAT RW CalPointGain 95 The gain to apply to the input at this calibration point FLOAT RW CalPointGain 96 The gain to apply to the input at this calibration point FLOAT RW CalPointGain 97 The gain to apply to the input at this calibration point FLOAT RW CalPointOffset1 98 The offset to apply to the input at this calibration FLOAT RW point CalPointOffset2 99 The offset to apply to the input at this calibration FLOAT RW point CalPointOffset3 100 The offset to apply to the input at this calibration FLOAT RW point CalPointOffset4 101 The offset to apply to the input at this calibration FLOAT RW point CalPointOffset5 102 The offset to apply to the input at this calibration FLOAT RW point CalPointOffset6 103 The offset to apply to the input at this calibration FLOAT RW point CalPointOffset7 104 The offset to apply to the input at this calibration FLOAT RW point CalPointOffset8 105 The offset to apply to the input at this calibration FLOAT RW point CalPointOffset9 106 The offset to apply to the input at this calibration FLOAT RW point Value 72 Reads the calibrated weight FLOAT R Counts 70 Raw A D counts INT32 R mVV 71 Factory calibrated mV V FLOAT R DigitalOut 108 Read or set the digital output state UINT8
45. A gt Linel0 0871 345672 lt 0D gt lt 0A gt VlFormat 00 0000 VlFormat 00 0000 SumFormat 00 0000 VlTrigger C675 VlTrigger FF34 PrintTrigger 0000 LineDelay 50 MinInterval 10000 SwitchMode 0 Customer Ticket From Handheld Device We have a handheld device T24 HA already configured to sum data from 4 devices We want the F1 button on the handheld to trigger a printout to a serial printer connected to the T24 SO We only want to print the gross sum that the handheld passes us The handheld is configured to send the Gross value as Data Tag ABCD when the F1 button is pressed The printer is not very fast so we can only send a line every 50mS Also we do not want to print more often than once every 5 seconds even if the handheld tries to do so We also want two tickets printed each time it is triggered We want the printed output to look like Mantracourt Electronics Ltd Weighment xx xxxx Kg Parameter settings Linel Mantracourt Electronics Ltd lt 0D gt lt 0A gt Line2 Weighment F1 Kg lt 0D gt lt 0A gt SumFormat 00 0000 PrintTrigger ABCD LineDelay 50 MinInterval 5000 Duplicate 1 LED Mode Indication The red LED indicates certain states and modes LED Operation Mode State y Red Blinking Device is operational Power Supply 6 to 28 Volts dc Installation The case can be mounted on a ceiling or wall The module can be removed from the case and fitted to a DIN rail using an option kit 69 M
46. AT RW display you require Default 0 ScalelnHi 77 Set or read a high input value at which you know what FLOAT RW display you require Default 1 ScaleDisplayLo 76 Set or read a low display value for the input value FLOAT RW stated in ScalelnLo Default 0 ScaleDisplayHi 78 Set or read a high display value for the input value FLOAT RW stated in ScalelnHi Default 1 ListSize 79 Set or read the size of the internal list of Data Tags UINT8 RW Can be between 1 and 20 Reset 54 Restarts the device and utilises new channel and Command encryption keys if those have been changed and saved Save 55 Save any changes made to parameters Required Command before power cycling or issuing a Reset command Requires 500mS recovery time after executing NOTE All changes require a SAVE command to enable them to survive through power cycle or RESET command Power Supply Recommend using alkaline AA cells as rechargeable are too low voltage and lithium may not be able to supply the current for the radio to start up Installation There are no specific installation instructions 61 Mantracourt Electronics Limited T24 Technical Manual T24 SO Serial Output Overview This device creates a serial output which can include data from up to 8 devices and optionally sum them The output is suitable for connecting to a printer serial display or for feeding directly into a PC or PLC The actual serial output can be designed by the use
47. Access will be enabled See Unslotted CSMA CA in Appendix A BattLevel 69 The voltage measured on the battery FLOAT R BattLowLevel 110 Set or read the battery voltage at which the low FLOAT RW battery flag will be set in all received packets and in the Status parameter SleepDelay 77 Time period before switching to low power sleep mode UINT16 RW if no StayAwake command or trigger received Setting to zero disables DataTag 119 Set or read the 2 byte Data Tag that is used when UINT16 RW transmitting the weight in a Data Provider Packet Note that default value is set to last 2 bytes of ID Value 72 Reads the calibrated weight FLOAT RW Counts 70 Raw A D counts INT32 R DigitalOut 108 Read or set the digital output state FLOAT R ShuntCal 109 Read or set the shuntcal state UINT8 R Status 74 Live status where the bit values indicate status The following table shows the decimal bit values and their meaning Mantracourt Electronics Limited T24 Technical Manual 48 1 STATUS SHUNT CAL 2 STATUS INPUT INTEGRITY 4 Reserved 8 Reserved 16 STATUS POWER UP 32 STATUS BATT LOW 64 STATUS DIGITAL INPUT 128 STATUS DIGITAL OUTPUT Reset 54 Restarts the device and utilises new channel and Command encryption keys if those have been changed and saved Save 55 Save any changes made to parameters Required Command before power cycling or iss
48. Ah Wakelnt WakeChkInt parameter FixedMeasurementCurrent 45 Internally the device will adjust SampleTime if it is too long for the TXInterval so we need to take this into account for our calculations If SampleTime 0 025 gt TXInterval then we need to make SampleTime TXInterval 0 025 Also note that we cannot use a TXInterval of less than 0 041 if we are in low power mode as this will cause unpredictable results If in Low Power Mode fixed block U1 0 5 TXInterval 1 Measurement block U2 FixedMeasurementCurrent TXInterval 0 006 fixed block U3 FixedMeasurementCurrent TXInterval SampleTime AwakeCurrent U1 U2 U3 HoursUsage 24 If not in Low Power Mode AwakeCurrent FixedMeasurementCurrent HoursUsage 24 Calculate currents Now calculate sleep current SleepCurrent 30 WakeInt 0 008 SleepCurrent SleepCurrent 24 HoursUsage 24 Calculate total current TotalCurrent AwakeCurrent SleepCurrent Calculate battery life in hours BattHours BattAH TotalCurrent 1000 Allow a safety margin BattHours BattHours 0 9 The calculated battery life in hours is BattHours Mantracourt Electronics Limited T24 Technical Manual 36 Installation Antennas Internal Chip Antenna There must be no metal objects within 7mm of the antennas long edge and 20mm from the short edges See diagram below
49. NT16 RW Data Provider packet to use as the input value 1 ValuelD2 102 Set or read the ID of the device acting as input 1 Used BINARY 3 RW to wake the remote device when Wake key pressed in Bytes Items Mode ValueDataTag3 83 Set or read the 2 byte Data Tag that is used to match a UINT16 RW Data Provider packet to use as the input value 1 ValuelD3 103 Set or read the ID of the device acting as input 1 Used BINARY 3 RW to wake the remote device when Wake key pressed in Bytes Items Mode ValueDataTag4 84 Set or read the 2 byte Data Tag that is used to match a UINT16 RW Data Provider packet to use as the input value 1 ValuelD4 104 Set or read the ID of the device acting as input 1 Used BINARY 3 RW to wake the remote device when Wake key pressed in Bytes Items Mode ValueDataTag5 85 Set or read the 2 byte Data Tag that is used to match a UINT16 RW Data Provider packet to use as the input value 1 ValuelD5 105 Set or read the ID of the device acting as input 1 Used BINARY 3 RW to wake the remote device when Wake key pressed in Bytes Items Mode ValueDataTag6 86 Set or read the 2 byte Data Tag that is used to matcha UINT16 RW Data Provider packet to use as the input value 1 ValuelD6 106 Set or read the ID of the device acting as input 1 Used BINARY 3 RW to wake the remote device when Wake key pressed in Bytes Items Mode ValueDataTag7 87 Set or read the 2 byte Data Tag that is used to match a UINT16 RW Data Pr
50. PacketSize 0x40 biInterval 0x1 Pipe 1 Endpoint Descriptor bLength 0x7 bEndpointAddress 0x82 IN bmAttributes 0x3 USB ENDPOINT TYPE INTERRUPT wMaxPacketSize 0x40 binterval 0x1 Device Descriptor bLength 0x12 bcdUSB 0x110 bDeviceClass 0x0 bDeviceSubClass 0x0 bDeviceProtocol 0x0 bMaxPacketSize0 0x8 idVendor 0x1781 idProduct OxBA4 bcdDevice 0x100 Manufacturer 0x1 Product 0x2 SerialNumber 0x3 bNumConfigurations 0x1 17 Mantracourt Electronics Limited T24 Technical Manual Parameter Value Configuration Descriptor bLength 0x9 bDescriptorType USB CONFIGURATION DESCRIPTOR TYPE wTotalLength 0x29 bNuminterfaces 0x1 Configuration 0x0 bmAttributes 0x80 Bus_Powered MaxPower 0x64 bLength 0x9 binterfaceNumber 0x0 bAlternateSetting 0x0 bNumEndpoints 0x2 binterfaceClass 0x3 Human Interface Device bInterfaceSubClass 0x0 No Subclass bInterfaceProtocol 0x0 None ilnterface 0x0 bLength 0x7 bEndpointAddress 0x1 OUT bmAttributes 0x3 USB ENDPOINT TYPE INTERRUPT wMaxPacketSize 0x40 binterval 0x1 bLength 0x7 bEndpointAddress 0x82 IN bmAttributes 0x3 USB ENDPOINT TYPE INTERRUPT wMaxPacketSize 0x40 binterval 0x1 NOTE If you do not want to use the Mantracourt supplied communications DLL T24drv dll you may be interested in the following We have successfully tested EasyHID which s
51. RE FE OPE I ATA vp rr eH Eua 54 Manual CONIL T 54 Available Modes iii A E 54 Item MOGs ii A A A A ETE E E E A AS UNE RU MR Y 54 Res lt Mode Ia e A A A ia ad 55 COMMUNICALIONS siii TOTO RAR AS EA E 55 Parameter ista iii AAA A AAA AA 56 Power SUPPIY vitara A iia 59 Iistallation z A A A A os ge A RUNS s 59 T24 HR Handheld Reader Roaming scescccsccscccesccccccescscescscescessceesseesccesseesseesseesseessessseeseens 60 OverVvieW o eese ees EA ie eee ie gr ee e ie c we ee eai e Y Co Gale tele e Y e 60 Communications exe ee cee Haan e EU e e CER EA RR EU A ie ER E bbe ees 60 Parameter Lists oi a seve rh Dre ha E ERI NER UNO ERUCK KNEE Saba A CEU HD IU ERA TUN EE C E 60 Power Supply ies cen sepe teer Ep rene e xa E SNR ern CER Ne REA A PAM ON MET E ERE CET 61 Installation o Ire a sua Pola Pens RAR EAR 8 ESE SS 61 24250 Serial Qutput 2 5 5222 5 02 0 A eere o eee I 62 OVerVvieW cues re E RR EP PER E PER ob bad ERR Ene RR e En P vd n PE P EDS E e ne RR P ED PULL En ERO SEDE EN ER ER POUR 62 Confieuration aitor RARE D ERU ENSE sob ade se ao Tia 62 COMMUNICATIONS zu voe rua ii e PER ET FEE TET V UR 62 Parameter Lists iusso tore a ais er o 62 TOKENS scout voa ose e ve volu o 67 Configuration ec lE 67 LED Display From a Single SOUTO cian id eene rne aei eene dake cess IT Ii 67 Summed LED Display From Dual Source ccc cece cence eee ence eee eee eeseeeeeeeeeeeee hehehe hene nen
52. RSS Ue epe RE Ve RES E ORE AAA A ve cus aces A E ROSE ETE IS AS 9 O ESSEN NER RC RO eae ols noe CH ERES ERR HERE RROG ER NO ERO eras 9 uic 10 ande Pp 10 Data Type eite vehe ETE reb cob reso er eg PEOR EPA RUPEE REX ERE EET eu FEE uU E UR Dean ERE PEE ODIT 10 RSS lev side s P 10 CV 10 n 10 Packet IE ETE 10 dona RCN 11 Rd M 11 CV ots esse A KE EEQR RE EA RU E E big EUR RESERVE AN E ERR ES 11 TIMEOUT mm 11 lo cM I DE 11 Erotm Da COT dede UE AUD ET 11 RSS sein desee eee eor ted ere IR e Iii 11 CM eve AT NN NN 11 DATA WIS ZB 11 In o CHER OI 11 donem v ER 11 aM 11 CM Sae ea AA EAS KERN SENSERI A E AAA AAA EF RA E AAA dle ER ROSE SEEN E oes 11 auri DICTI NN 11 Pair Requests oer essen aen die res edet Fig e bie ER eR Te E EDEN Fere rhe P eni ne SER EU A E EN ER D REFER ene 12 Packet TYDE iia EL EUER 12 D ta T3925 eese ex voepoa eve Fixed ees tis ve re tie weniger ue reto erere Pha eure ae ec eph sth nye SEC pine FS TEE e wide 12 cei pee 12 Sunt M 12 DU OM 12 Pair STRICTE T DIT TIT LT ITI 13 uid CIMERIIEE IE 13 Mire E E 13 DEVI 13 AME 13 c A E 13 T24 BSi and T24 BSu Base Station
53. RW 0 Turn digital output off 1 Turn digital output on 2 Make digital output mirror the LED state V1 05 and later ShuntCal 109 Read or set the shuntcal state UINT8 RW Turn shuntcal off 1 Turn shuntcal on Status 74 Live status where the bit values indicate status The following table shows the decimal bit values and their meaning 1 STATUS_SHUNT_CAL 2 STATUS_INPUT_INTEGRITY 4 Reserved 8 Reserved Mantracourt Electronics Limited T24 Technical Manual 22 16 STATUS POWER UP 32 STATUS BATT LOW 64 STATUS DIGITAL INPUT 128 STATUS DIGITAL OUTPUT Reset 54 Restarts the device and utilises new channel and Command encryption keys if those have been changed and saved Save 55 Save any changes made to parameters Required Command before power cycling or issuing a Reset command Requires 500mS recovery time after executing Wake 50 Wake the module from sleep Command Sleep 56 Sends the module to Sleep Command Pause 57 Stops the output streaming to allow configuration Command Resume 59 Streaming continues Command StayAwake 58 No function other than to reset SleepDelay timer Command SleepTrigger 120 Enter Data Tag to watch for that will trigger sleep UINT16 RW mode PauseTrigger 121 Enter Data Tag to watch for that will trigger pause UINT16 RW mode ResumeTrigger 123 Enter Data Tag to watch for that will trigger resume UINT16 RW mode StayAwakeTrigger 122 Enter Data
54. T24 SAf Strain Acquisition Fast nidad ii oio nene ae vene sene er sepe wede sou DUw aU pe eus EEEE 48 OVEVIEW osese PR P 48 COMMUNICACION o ee orc er d on eee one Oo Qe Oo UR Oo See xe OO OR Oo Sexe Oo Oe Or PA He doo e E ede e oed 48 Mantracourt Electronics Limited T24 Technical Manual 2 3 Parameter List 2 d EIMRRRRER VES iia 48 Data Provider Format aia IRI iN A eo pa i d Nr i EU daw deu do Oen 49 Measurement Resolution ia dave dosis 50 A eee see eeecescevebe A E E 50 OSAMA eR RT 50 ANCONS A ITIN NEIN IIIS 50 Internal Chip ARENA asses cepe etre A e rey EH expe A AAA 50 External Antennas uv Ie e i rev E Le e M ET e iri aa 51 T24 HS Handheld Reader Simple cceeeeeeeeeeeee eene eee enhn hne hh nest h ether eere 52 maa 52 Communications ursa e RR NAE AAA AAA AAA RAN RUE EARN RS AN AAA AAA 52 ParametertList iri 0 05 sep sie yr bre rereroEKPebere a eg 52 Power SUpDly eres eo re teas EE eo ue EAR ae eer er eere Ete re RP sak ne Rand ewig EE ee ee P PES aed seeds eed 53 listallatiOn zo e wre a Sea UG os FG Ok a a PDC uy e o RE PCR NER ES NY 53 T24 HA Handheld Reader Advanced cceeeeeeeeeeeeeeee eene enhn heh h etre h ether eere eene 54 OVerVieW c caet setis tet ree rint stds week EE UE VER wet E wad eae he wee were vuela wet Usus Pied exwbe ute ver e sere IS 54 A tomatlc PalFlng sede cesses saree serrer rrr rre NEKE SEE E VES ER MES EVE E
55. VALID DATA response When executing a command you do not need any data so it is usual to specify the data type as No Content zero and not include any data Packet Type To ID Command Data Type Data 06 00 00 00 00 00 LL Packet Type This is Ox6 hex 6 decimal To ID This is the ID of the device to write to from MSB first You can use the broadcast ID here of OxFFFFFF 255 decimal for each of the To ID bytes but be careful as this will write the value to all devices on the same channel and encryption key You may have mixed device types so command numbers between devices may be different Use broadcast with care Command The command number of the parameter you want to write to You will need to refer to the device manual for this information Data Type Specify the data type of the data you are sending Data types are as follows 0 No content unknown 0 1 UINT8 1 2 UINT16 2 3 INT32 4 4 Float 4 Mantracourt Electronics Limited T24 Technical Manual 8 5 String 0 64 6 Binary 0 64 NOTE See Data Type Formats in Appendix A Responses to Read and Write The response to either a read or write can be as follows Responses to Read ACK NAK TIMEOUT Responses to Write ACK NAK TIMEOUT DATAINVALID ACK If the ACK response is for a write then it will not contain data Packet Type From ID RSSI CV 07 00 00 00 00 0
56. W Mantracourt Electronics Limited T24 Technical Manual 52 between receiving Data Provider packets from the paired device will cause the display to show z Default 3 range 0 to 65535 default 3 KeepAwakelnt 66 Set or read the interval in seconds between the UINT16 RW handheld transmitting StayAwake signals to the paired device range 0 to 65535 default 5 DisplayUpdate 74 Set or read the interval between LCD updates Default UINT16 RW 300 PairWait 67 Set or read the period in seconds that the handheld UINT8 RW will wait for another device to pair when placed into pair mode range 0 to 65535 default 5 Format 70 Set or read the format for the display Here you can STRING 8 RW define how the value will be displayed and where the bytes decimal point will appear By including a non zero value this will define the resolution of the displayed value i e the smallest step size of value changes Default 0000 001 ZeroSupp 71 Set or read whether to show the value on the display UINT8 RW with zero suppression 0 No zero suppression 1 Zero suppression ZeroBand 72 Set or read the band within which zero will be FLOAT RW displayed As soon as the value exceeds ZeroBand the actual value will be displayed This will effectively mask small changes after taring the device Overload 73 Set or read the value of the display above which FLOAT RW instead of the value being displaye
57. YAWAKE packets it is best to use the Data Provider Control Interface to periodically respond to the arrival of the data provider packets from the module Once the session has ended you can either stop issuing STAYAWAKE packets so the module sleeps due to its SleepDelay or you can force the module to sleep by just issuing a normal SLEEP command Depending on what drivers you are using you may have different options to achieve the above The following explains how to receive data provider packets wake issue StayAwake packets and sleep and for different drivers supplied by Mantracourt Mantracourt Electronics Limited T24 Technical Manual 76 Windows DLL Function Data Provider Packets How To Callback activated when data provider packets arrive Wake Use WRITEREMOTE function specifying the command number 50 and use the specific module ID or FFFFFF for broadcast wake Pause Via Data Provider Control Interface using WRITEPACKET StayAwake Via Data Provider Control Interface using WRITEPACKET Sleep Use WRITEREMOTE function to send appropriate sleep command to specific or broadcast ID COM Driver or Dot Net Assembly Function Data Provider Packets How To An event will be raised which lets you know the Data Tag and the Value of the arriving data Wake WakeByID BaseStation DevicelD or WakeBroadcast BaseStation Pause Via Data Provider Control Interface using WritePacketNumeric i e WritePacketNumeric
58. a Print when loss of 0 data communications occur data communications occur 1 Trigger a Print when loss of NOTE All changes require a SAVE command to enable them to survive through power cycle or RESET command Tokens The following tokens can be inserted into the Line1 to Line20 parameters and are decoded when a Print output is triggered Tokens are enclosed in triangular brackets Token Function Example V1 V8 Substitutes token with the last value received from the input This 1 2345 will already have system zero subtracted If a DoSysZero command has been issued and tare subtracted If a DoTare command has been issued or the switch input has executed a tare GV1 GV8 Substitutes token with the last value received from the input This 1 2345 will already have system zero subtracted If a DoSysZero command has been issued but no tare subtracted i e it will always contain the Gross value of the specified input lt RV1 gt RV8 Substitutes token with the last value received from the input This 1 2345 will NOT have system zero or tare values subtracted TV Substitutes token with the value carried in the Data Provider packet 1 2345 that has triggered the Print lt LOG gt Substitutes token with the log value Each time a Print occurs the 0003 log number will be incremented lt G gt Substitutes token with the Gross sum of
59. all active inputs System 1 2345 zero values will have been extracted lt N gt Substitutes token with the Net sum of all active inputs System 1 2345 zeros will have been subtracted and also if a Tare has been issued then the tare value will be extracted lt EZ gt Substitutes token with the External System Zero 1 2345 lt GN gt Substitutes token with the GrossText or NetText parameter contents Gross depending on the NetMode o Substitutes token with the ASCII character whose ASCII value is xx um where xx is a two digit hexadecimal value i e 0D Below are listed some useful hex codes 0D Carriage Return 0A Line Feed 09 Tab 1B Escape Configuration Examples LED Display From a Single Source We want to put data from a T24 SA onto a large LED display We will use the out of the box rate of 3 per second The display only needs the ASCII data followed by a carriage return 67 Mantracourt Electronics Limited T24 Technical Manual Assuming the T24 SA sends its data on Data Tag C675 Linel lt V1 gt lt 0D gt VlFormat 00 000 Timeout1 2000 ValueDataTagl C675 PrintDataTag C675 MinInterval 100 LineDelay 0 PrintOnError 1 SwitchMode 1 Summed LED Display From Dual Source We want to put the summed Net data from a pair of T24 SAs onto a large LED display We want the switch input of the T24 SO to toggle between Gross and zeroed net mode The printed outp
60. an RSSI of around 74 In this example the gain of the receive antenna and the receiver enclosure loss are identical and therefore cancel out this is what happens in the T24 HS In the case of the T24 BS however peak gain of the PCB antenna is 6dB and the enclosure loss is between 3 and 5dB depending on composition of the ABS Mantracourt Electronics Limited T24 Technical Manual 84 Example 4 In this final example a T24 SA is fitted inside a Loadlink transmitting data to a T24 BS base station The T24 SA has an integral Rad24i radio and the Loadlink has been assembled with fibreglass RF windows for minimum signal loss The T24 BS contains a Rad24e radio that is connected to an antenna of 2 9dBi gain by a 3m length of RG174 cable attenuation at 2 4GHz is 1 67dB metre in this cable assembly The arrangement is illustrated at Figure 3 Slant range 150metres Loadlink enclosure loss 0 2dB 3m of RG174 i G Transmit antenna gain G Receive antenna gain Feeder loss 5 0dB Det ie ae ae E Figure 3 Sum of all the gains Gr Gr 1 2 9 3 9 Sum of all the losses Enclosure loss Path loss Feeder loss From the Path loss table we see that the loss over 150m is 75 92dB so the sum of losses is 0 2 75 92 5 0 81 12 Subtract that from the sum of the gains 3 9 81 12 77 22 So the estimated power at the receiver input is 77 22dBm Refer to Table 1 below that shows the relation
61. an be found at 1 5 Volts and can therefore be a direct replacement for Alkaline cells The low internal resistance and high capacity make these batteries an ideal choice Example Energizer L91 These generally start at 3 7V and exceed the maximum allowable voltage These are usable if a regulator and charging circuit can be installed between the T24 SA and the battery Care must be taken here that the regulator does not draw too much current when idle so that the low power modes are not compromised Recommend T24 PSSB module This is used for batteries which have an internal resistance of greater than 150mOhms overcoming voltage drops during high current phases of the low power mode cycle Mantracourt Electronics Limited T24 Technical Manual 24 This problem becomes apparent when attempting to communicate with a T24 SA using the T24 Toolkit or power cycling when the battery is near the end of its life In normal operation Low power mode with a handheld T24 HS where the T24 SA is connected to an uninterrupted battery this module is generally not required Using lower impedance strain gauges or multiple parallel strain gauges exacerbates this problem Consult Sales for details Alternatively fit an electrolytic capacitor across battery of 2000uF or greater This capacitor should be of low ESR 70mOhms Lithium lon Polymer Module T24 PSSB Provides a means of charging the Lithium lon or Polymer battery from a nominal 5V DC supply and als
62. antracourt Electronics Limited T24 Technical Manual Connections TX ES RS232 GND CTS 2 3 5 8 120R TERMINATING RESISTOR SHIELD Serial Settings The serial output is set at 8 data bits 1 stop bit and no parity The baudrate can be selected as can RS232 or RS485 operation SW1 Settings Switch positions 1 to 4 are not used Switch positions 5 to 7 control the baudrate for the serial interface Whether the serial interface is RS485 or RS232 is selected by switch position 8 5 6 7 Baudrate USB NA Off Off Off 9600 On Off Off 19200 Off On Off 38400 On On Off 57600 Off Off On 115200 On Off On 230400 Off On On 460800 On On On This switch position selects whether the serial interface is RS232 or RS485 232 485 RS232 Off RS485 On Mantracourt Electronics Limited T24 Technical Manual T24 AO1 Analog Output Overview The T24 AO1 and T24 AO1i provides an analogue output for the acquisition modules such as T24 SAx and T24 SAFx The T24 AO1i is housed in an IP67 housing for industrial installation whilst the T24 AO1 is designed for desktop mounting The output can be selected from the following pre calibrated Voltage and Current ranges 0 10Volts 10Volts 0 5Volts 5Volts 0 20mA 4 20mA both of which can be used in a sink or source mode The T24 AO1 is configured by entering engineering values against
63. ata the module 8 Response NAK Response Not Broadcast Used to indicate that a routed Acknowledged The packet was broadcast so the command was not receiver knows not to respond recognised 9 Response Response Timed out A Timeout response was not received by the device 10 Response Data Response Data invalid Mantracourt Electronics Limited T24 Technical Manual Invalid The device has reported that the data in a Write was invalid or out of range Data Packet Structures The following structures show how the data is defined within the Data Packet Structure of the overall packet Data Provider These packets are sent at intervals by some devices and contain data There is no need to request these packets as they arrive automatically If you have multiple base stations and these are within the range of the transmitting device the packets will arrive from each base station Data Type Status Data RSSI CV Packet Type This is 0x3 hex 3 decimal and may have higher bits set which indicate Error Low Battery and Broadcast Data Tag Every device that transmits Data Provider packets has a configurable 2 byte Data Tag Devices that consume Data Provider Packets can be configured to look for specific Data Tags The reason we use Data Tags and not just rely on a devices ID for identification is that in a working system multiple devices may be relying on data from a single device I
64. atched between the base station and the module and the ID of the module is not needed to be known beforehand Also pairing can be used to make the module enter the PAUSED mode so it can be communicated with As in the case of the T24 Toolkit or just identified and then made to continue with its default run mode If pairing is not employed then a manual means of connecting to the module is required NOTE this is only required for configuration as once configured you would just consume the Data Provider packets and possibly wake sleep so would not need to pair or otherwise connect to the module To configure a device that is in Deep Sleep it is first woken This can be achieved by using a broadcast wake where ALL modules on the current radio channel will wake or wake by ID where just the specific module is woken This is preferred otherwise with multiple modules woken and in default running mode there may be lots of traffic from Data Providers being transmitted which will interfere with the connection configuration process Once the module has been woken it will enter its default running mode and will be transmitting data provider packets If the module is not running in low power mode then you could communicate directly using read write packets to perform the configuration It is recommended though to issue a Pause command to stop the module transmitting data providers and also stopping it going back to sleep after the SleepDelay time has elapsed if that is e
65. attery Types Battery Type Alkaline Zn MnO Nickel Metal Hydride NiMh Nickel Cadmium NiCad Lithium Primary 3 6V Li SOCL Lithium Iron Disulphide Li FeS Lithium lon and Lithium Polymer LiON LiPo Notes Pairs of alkaline 1 5V cells are the most common Use D cells for maximum life and AA cells where space is restricted Example Varta 4014 D Varta 4006 AA Recommend T24 PSSA module to maximise usable capacity Most cells are 1 2V so two in series gives 2 4 Volts These can match alkaline batteries in capacity but as the charged voltage is lower they do not match the usable capacity These batteries self discharge at a faster rate than alkalines If charging these cells in circuit precautions must be taken to ensure that the maximum voltage on the T24 SA is not exceeded Example GP 270AAHC AA Recommend T24 PSSA module to maximise usable capacity Most cells are 1 2V so two in series gives 2 4 Volts Three in series can be used to give 3 6 Volts These do not have the usable capacity of an alkaline battery These are generally only useful if they are to be charged on a regular basis If charging these cells in circuit precautions must be taken to ensure that the maximum voltage on the T24 SA is not exceeded Example Recommend T24 PSSA module to maximise usable capacity Lithium cells can be used but note that the maximum voltage is 3 6 Volts Select a cell with low internal resistance Example Saft LS17500
66. ceiver Input Power and RSSI Relationship occoccocccncnncnnconcnccnconccoccnccoccccco he hehe hene seen 86 PathiEossiat 2 4GHZ vetere nO O ver Ve ER Ou 87 Power DENSI cs vsus voee ee rar ENSURE eq E eU d rad egi Sane te RV deg xu VE Fea S Vo STANS E DESEE a 88 dis os ABIRE PR Len 88 Appendix C mr ch S 89 Customisirig T24 TOOlKit i eere rhy ire ate t s his enn ire ete Ue bie wale ree Yu Vain ve v ee Ne SE YR 89 AppendbcD 2 3 22 2 32208 A tabe se Poe d ned iab rese n dope da e das ece v seul ii 90 Approvals peor tS E vL A eS ees eu Db Eve eR T ek Cas 90 EET 90 FC C eee A E E Y ECKE ORE tees Exe CON UR sabe EX Re OR RE a ew chee INSERIRE ERREUR 90 Ind stry Canada eoe A A ted de dece Ue ee taxe ie dex ene ese Ende eee 90 OEM Reseller Marking and Documentation Requirements ceseessessessessese eee 91 ECC UAI E ep EE ERRARE ERR e S NOI OE ETE UADERER HERES ERE ERE 91 e EE 91 a 91 Worldwide Regional ApprovalS oooococccoccnoncconcnonanonaronoronn nono ro nn ron r cnn ron ron ron heres eterne ean 92 Important ice a A a dels E EEEE leas 92 Mantracourt Electronics Limited T24 Technical Manual 4 Introduction Overview This manual contains advanced information on T24 telemetry range of devices This includes more detailed information than supplied in the device manuals and also programming information To communicate with T24 devices a base station is required Base sta
67. cket to use as the input value 1 ValuelD12 112 Set or read the ID of the device acting as input 1 Used BINARY 3 RW to wake the remote device when Wake key pressed in Bytes Items Mode AllowNext 129 Determines whether to allow the ability to view UINT8 RW individual items when in Result mode Set to zero to disable or set to a number representing Mantracourt Electronics Limited T24 Technical Manual 58 the number of seconds to hold down the Next key to activate this feature Once activated the Next key steps through all input values Once the device is powered off this feature would have to be activated again range 0 to 30 default 6 AllowSysZero 130 Determines whether to allow the ability to perform UINT8 RW system zero by pressing and holding the Tare key Set to zero to disable or set to a number representing the number of seconds to hold down the Tare key to perform the system zero range 0 to 30 default 12 Reset 54 Restarts the device and utilises new channel and Command encryption keys if those have been changed and saved Save 55 Save any changes made to parameters Required Command before power cycling or issuing a Reset command Requires 500mS recovery time after executing DoSysZero 120 Perform a system zero on all devices This will remove Command the current input values so from this point on the current input will give a value of zero This can be removed by issuing the RmSysZero command
68. d Overload will be displayed ScalelnLo 75 Set or read a low input value at which you know what FLOAT RW display you require Default 0 ScalelnHi 77 Set or read a high input value at which you know what FLOAT RW display you require Default 1 ScaleDisplayLo 76 Set or read a low display value for the input value FLOAT RW stated in ScalelnLo Default 0 ScaleDisplayHi 78 Set or read a high display value for the input value FLOAT RW stated in ScalelnHi Default 1 Reset 54 Restarts the device and utilises new channel and Command encryption keys if those have been changed and saved Save 55 Save any changes made to parameters Required Command before power cycling or issuing a Reset command Requires 500mS recovery time after executing NOTE All changes require a SAVE command to enable them to survive through power cycle or RESET command Power Supply Recommend using alkaline AA cells as rechargeable are too low voltage and lithium may not be able to supply the current for the radio to start up Installation There are no specific installation instructions 53 Mantracourt Electronics Limited T24 Technical Manual T24 HA Handheld Reader Advanced Overview The T24 HS captures Data Provider data from multiple devices and displays it The T24 HS also performs the function of optionally waking the remote device when it is turned on and sending it to deep sleep mode when it is turned off If no buttons are pre
69. d and write parameters and execute commands Parameter List Parameter Command Description ID Read the unique identifier ID for this device 3 bytes BINARY 3 bytes Version 53 Read the firmware version FLOAT R Channel 11 Radio Channel UINT8 RW EncKey 15 The radio encryption key to operate on Requires BINARY RW power cycle or Reset to enable Not supported in this 16 Bytes release Power 12 Set or read the output power level 0 100 UINT8 RW Name 10 Set or read a user defined name 11 characters STRING RW 11 Bytes Model 51 Read the model number of the device STRING R 11 Bytes WakeChkInt 16 Set or read the interval in milliseconds that a sleeping UINT16 RW device will wake to request a full wake from the base station default 3000 UseCSMA 18 Select whether to use Carrier Sense Multiple Access UINT8 RW techniques on transmission 0 Disabled The Carrier Sense Multiple Access will be disabled NOT RECOMMENDED 1 Enabled The Carrier Sense Multiple Access will be enabled See Unslotted CSMA CA in Appendix A BattLevel 69 The voltage measured on the battery FLOAT R BattLowLevel 110 Set or read the battery voltage at which the low FLOAT RW battery flag will be set in all received packets and in the Status parameter LowPowerMode 75 Defines power save mode UINT8 RW 0 Awake all the time and transmit at TxInterval 1 Sleep Wake at TXInterval acquire value transmit valu
70. e sleep TxInterval 76 Time Interval between Transmissions Set mS INT32 RW SampleTime 78 Set or read the SampleTime in milliseconds for UINT16 RW acquiring a reading at each TxInterval interval The larger the SampleTime the more accurate the reading but at the expense of battery life Default 5 SleepDelay 77 Time period before switching to low power sleep mode UINT16 RW if no StayAwake command or trigger received Setting to zero disables DataTag 119 Set or read the 2 byte Data Tag that is used when UINT16 RW transmitting the weight in a Data Provider Packet Note that default value is set to last 2 bytes of ID NumCalPoints 79 Number of calibration points required Range 2 to 9 UINT8 RW 39 Mantracourt Electronics Limited T24 Technical Manual CalPoint1 80 The full scale value of this calibration point FLOAT RW CalPoint2 81 The full scale value of this calibration point FLOAT RW CalPoint3 82 The full scale value of this calibration point FLOAT RW CalPoint4 83 The full scale value of this calibration point FLOAT RW CalPoint5 84 The full scale value of this calibration point FLOAT RW CalPoint6 85 The full scale value of this calibration point FLOAT RW CalPoint7 86 The full scale value of this calibration
71. e device to which you are pairing Usually from a base station this is not required and can be set to 0x00 0x00 This is present as the same mechanism is used when two devices pair together and in that case they will each want to give the other their default Data Tag Direction The value of this byte determines whether the remote device radio settings are configured to match the base station or if the base station is changed to match the remote device Both the Channel and the encryption key are matched once pairing has completed 0 The settings in the remote device are changed to match the base station settings CM The base station settings are changed to match the remote device Config The value of this byte determines whether the remote device will enter configuration mode which will inhibit any low power operation transmission of data provider packets and the ability to enter deep sleep mode This mode is required otherwise communication whilst configuring could be very poor or impossible 0 Do not change operation 1 Cause the device to enter config mode to enable it to be configured NOTE after pairing with a device and using the Config option it is recommended that the device be power cycled after so that it resumes its normal operation Duration The value of this byte determines whether the base station will be in pair mode for the default time of 5 seconds or whether to use the
72. e if it is too long for the TXInterval so we need to take this into account for our calculations If SampleTime 0 025 gt TXInterval then we need to make SampleTime TXInterval 0 025 Also note that we cannot use a TXInterval of less than 0 041 if we are in low power mode as this will cause unpredictable results Calculate measurement current LoadCellCurrent 5000 LoadImp 2 If in Low Power Mode fixed block Ul 0 5 TXInterval 1 Measurement block U2 FixedMeasurementCurrent LoadCellCurrent TXInterval 0 006 fixed block U3 FixedMeasurementCurrent LoadCellCurrent TXInterval SampleTime AwakeCurrent Ul U2 U3 HoursUsage 24 If not in Low Power Mode AwakeCurrent FixedMeasurementCurrent LoadCellCurrent HoursUsage 24 Calculate currents Now calculate sleep current SleepCurrent 30 WakeInt 0 008 SleepCurrent SleepCurrent 24 HoursUsage 24 Calculate total current TotalCurrent AwakeCurrent SleepCurrent Calculate battery life in hours BattHours BattAH TotalCurrent 1000 Allow a safety margin BattHours BattHours 0 9 The calculated battery life in hours is BattHours Installation Antennas Internal Chip Antenna There must be no metal objects within 7mm of the antennas long edge and 20mm from the short edges See diagram below 27 Mantracourt Electronics Limited T24 Technical Manual
73. e the CRC of a string and append the two CRC bytes to the end of the string SUB GenerateCRC16 sTarget AS STRING 5 Mantracourt Electronics Limited T24 Technical Manual reads from buffer DIM CRC AS LONG DIM LSB AS INTEGER DIM C AS LONG DIM D AS INTEGER DIM Res 1 AS BYTE CRC 65535 FOR C 1 TO LEN sTarget xor byte CRC CRC XOR ASC MIDS sTarget C 1 FOR D 1 TO 8 get lsb LSB CRC AND 1 1 move right ERE INE CRC 22 Lf LSB was 1 xor with polynomial IF LSB THEN CRC CRC XOR HA001 NEXT D NEXT C sTarget sTarget CHR CRC AND 255 sTarget sTarget amp CHRS INT CRC 256 END SUB Packet Type Byte The Packet Type bytes indicates the type of packet and holds information regarding Error Low Battery and Broadcast status of received packets Error LoBatt Broadcast Packet Type 0 0 0 0 0 0 0 Bit Function Value Type Description Error Bit indicated an error is present 3 Data Provider Used to provide This is set and reset by the unrequested data device which will include this 5 Read Read data from a specific information in the packet sent to device the module 6 Write command Write a value or execute a LoBatt Bit indicated a low battery This command to a specific is set and reset by the device device which will include this 7 Response ACK Response Acknowledged information in the packet sent to May also contain d
74. eS Lithium lon and Lithium Polymer LiON LiPo In line Battery Modules Capacitor Module T24 PSSA Notes Pairs of alkaline 1 5V cells are the most common Use D cells for maximum life and AA cells where space is restricted Example Varta 4014 D Varta 4006 AA Recommend T24 PSSA module to maximise usable capacity Most cells are 1 2V so two in series gives 2 4 Volts These can match alkaline batteries in capacity but as the charged voltage is lower they do not match the usable capacity These batteries self discharge at a faster rate than alkalines If charging these cells in circuit precautions must be taken to ensure that the maximum voltage on the T24 SA is not exceeded Example GP 270AAHC AA Recommend T24 PSSA module to maximise usable capacity Most cells are 1 2V so two in series gives 2 4 Volts Three in series can be used to give 3 6 Volts These do not have the usable capacity of an alkaline battery These are generally only useful if they are to be charged on a regular basis If charging these cells in circuit precautions must be taken to ensure that the maximum voltage on the T24 SA is not exceeded Example Recommend T24 PSSA module to maximise usable capacity Lithium cells can be used but note that the maximum voltage is 3 6 Volts Select a cell with low internal resistance Example Saft LS17500 A Saft LSH20 D Recommend T24 PSSA module as these cells usually have a high internal resistance These c
75. econd giving a measurement rate of 2KHz There are fewer functions than the T24 SA and no operational low power mode although the device can be sent to sleep The values are delivered via a binary Data Provider packet and the data format is 32 bit integer factory calibrated to nV V nanovolts per volt Communications To configure the device you will use the Read and Write mechanisms described in the Data Packet Structures section to read and write parameters and execute commands Parameter List Parameter Command Description Number ID 3 Read the unique identifier ID for this device 3 bytes BINARY 3 bytes Version 53 Read the firmware version FLOAT R Channel 11 Radio Channel UINT8 RW EncKey 15 The radio encryption key to operate on Requires BINARY RW power cycle or Reset to enable Not supported in this 16 Bytes release Power 12 Set or read the output power level 0 100 UINT8 RW Name 10 Set or read a user defined name 11 characters STRING RW 11 Bytes Model 51 Read the model number of the device STRING R 11 Bytes WakeChkint 16 Set or read the interval in milliseconds that a sleeping UINT16 RW device will wake to request a full wake from the base station default 3000 UseCSMA 18 Select whether to use Carrier Sense Multiple Access UINT8 RW techniques on transmission 0 Disabled The Carrier Sense Multiple Access will be disabled NOT RECOMMENDED 1 Enabled The Carrier Sense Multiple
76. ed in generating the result sum FLOAT RW Value2 61 Read or write the value used as input 2 which can be represented with the V2 token and is used in generating the result sum FLOAT RW Value3 62 Read or write the value used as input 3 which can be represented with the V3 token and is used in generating the result sum FLOAT RW Value4 63 Read or write the value used as input 4 which can be represented with the V4 token and is used in generating the result sum FLOAT RW Value5 64 Read or write the value used as input 5 which can be represented with the V5 token and is used in generating the result sum FLOAT RW Value6 65 Read or write the value used as input 6 which can be represented with the V6 token and is used in generating the result sum FLOAT RW Value7 66 Read or write the value used as input 7 which can be represented with the V7 token and is used in generating the result sum FLOAT RW Value8 67 Read or write the value used as input 8 which can be represented with the V8 token and is used in generating the result sum FLOAT RW Timeout1 100 Read or write the timeout in milliseconds If the time between receiving data from the device defined as input 1 Set in ValueDataTag1 exceeds this value then the V1 token and any tokens using this value will result in
77. ed is the useable signal strength at the receiver input represented by the Received Signal Strength Indicator RSSI figure RSSI is a negative number related to signal strength in dBm a smaller number represents a stronger signal so 70 is much better than 80 To obtain a reliable link using Rad24 radios RSSI must be no worse than 85 to 90 beyond this figure packet loss rate increases and link quality drops off sharply A table illustrating the relationship between receiver input power and RSSI is reproduced at Table 1 below Radiated energy diminishes over distance with an inverse square law signal power is also lost due to absorption and scattering in the air between the transmit and receive antennas these losses are referred to as Free Space Path Loss and vary according to the wavelength of the signal At 2 4GHz Free Space Path Loss is given by Path Loss 32 4 20Lo94 d Where Path Loss is expressed in dB d Path length in metres Example 1 Path Loss over 80metres 32 4 20Lo8 0 80 20Log1080 38 06 Path Loss 32 4 38 06 70 46 dB For convenience Table 2 below gives path losses at range intervals of 5 metres Example 2 An estimate of signal power at the receiver input can be made by considering two Rad24i radios in the open separated by a distance of 80m Rad24i output power is OdBm and the peak gain of the integral antenna is 3dB as shown at Figure 1 below 80m Gr AIR Gg 3dB 3dB Path loss 70 46dB
78. efault 1 Timeout 65 Set or read the time in seconds that if exceeded UINT16 RW between receiving Data Provider packets from the paired device will cause the display to show Default 3 KeepAwakelnt 66 Set or read the interval in seconds between the UINT16 RW handheld transmitting StayAwake signals to the paired device Default 5 DisplayUpdate 74 Set or read the interval between LCD updates Default UINT16 RW 300 PairWait 67 Set or read the period in seconds that the handheld UINT8 RW will wait for another device to pair when placed into pair mode Default 5 Format 70 Set or read the format for the display Here you can STRING 8 RW define how the value will be displayed and where the bytes decimal point will appear By including a non zero value this will define the resolution of the displayed value i e the smallest step size of value changes Default 0000 001 ZeroSupp 71 Set or read whether to show the value on the display UINT8 RW with zero suppression 0 No zero suppression 1 Zero suppression Mantracourt Electronics Limited T24 Technical Manual 56 ZeroBand 72 Set or read the band within which zero will be displayed As soon as the value exceeds ZeroBand the actual value will be displayed This will effectively mask small changes after taring the device FLOAT RW Overload 73 Set or read the value of the display above which instead of the value being displayed Overload will be displayed
79. eiae EET 75 Configuration eoo o iore aaa IAS SESS VE TN VANQUR EOI RITA E Ia 75 Data ACQUISILION aa isoeos des tear E SR TAE SR ERR SR ATOE os gees ERA RAMS ORG eR Nee BAe OR ae RUNS OOE ORT RRS 76 Data Types Formats aora de IS AS BA A Eques 78 WI NT Bien ii A A A ia 78 A O A dane 46 umn downed ouie ee drnD ecu dew donee Do dorts 78 Mantracourt Electronics Limited T24 Technical Manual orig A A A 78 A a oasis 78 DNA A ee aera eae Aeon aa sre a obe ee Ure RE EN VES 78 SB Ero 80 Unslotted CSMA CA oa TER AE o paese roro er AAA sae ys xir ve kr Lava og 81 With CSMA Disabled iets odian SA A Y E OR E NERO CE e EAE haa 81 With CSMA Enabled icr o Re re eye eO EE E ER pere dus cena SEES CERERI ER E RE Te eee vas 81 Data Tag Control Interface Advanced oooococcconcconcnonnnonononononorono eee e nesses eens eens tees esee teneas 81 Appendix B o tocara T nl Deseo PUE puse nee sevo e PUER EE RE NU Seaweed eau aa 83 Radio RarJge isse eee eaaet Wig Dude als ERR E ERR E ERR REESE EE REERVE ERE RAE wa by RREERUXVREE AY 83 Example dd eer Nedaedh nee eit ne rc UP P eT 83 Example Zi an re Reo needs ida epos ober A rS 83 EXP ec 84 Exatrmiple4 0 oet A ese veas vat seat a tut saa ves vas eral vest vele vaut reus vUa reed vate velar ps 85 Antenna m DEN 86 ASAIN iss as T EA 86 Polaris idee T 86 Mounting Requirements TI TD I D E UL DL TTL TID 86 Re
80. f 4 bytes and is stored in 2 s compliment form The bytes are in order of significance MSB first MSByte LSByte 31 30 29 28 27 26 25 24 23 22 21 20 19 18 16 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 Sign Bit Float Represents a numeric value from n to n and consists of a 4 byte in IEEE 754 format MSByte LSByte 31 30 29 28 27 26 25 24 23 22 21 20 19 18 16 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 Exponent 7 bit excess 127 Mantissa bit fraction with implicit 1 Sign Bit The byte containing the sign and exponent is sent first with the LS byte of the mantissa being last The value of the number is thus 1 Sign 2 Exponent 127 1 Mantissa Note the assumed 1 before the mantissa The exception to this is the special value 0 0 which is represented as 4 zeroes The precision of this format is to 7 digits eg a floating point number of 12345 678 is represented as hex C640E6B6 String Represents a textual string and is terminated by a NULL ASCII 0 Binary The bytes have no set meaning and are just a string of bytes These bytes can be any value and may contain non ASCII characters Mantracourt Electronics Limited T24 Technical Manual 78 79 Mantracourt Electronics Limited T24 Technical Manual RSSI
81. f that device were ever replaced then its unique ID would change and therefore multiple devices would have to be reconfigured By using a Data Tag we only need to change this tag on the replacement device and the rest of the system will work as required Status The bit values in this byte are used to indicate certain things Only two bits are allocated a global meaning The rest are device specific and you will need to refer to the device manual for clarification Status Byte bit 4 bit 3 X X bit 7 X bit 6 X bit 5 X bit 2 X bit 1 Integrity bitO Shunt Cal Data Type This byte defines how the data is formatted in this packet and also indicates the best way to represent the data Function Display As Data Type Bit 7 6 5 4 2 1 0 Sample 0 1 1 1 1 0 0 1 0 Undefined 1 Numeric Numeric representation based on Data Type 2 Boolean The data may be in any format but represents a boolean result where non zero numeric is True and string length 1 or O is True 3 Text Can display as ascii text 4 Binary unprintable Unprintable characters 5 Hex Best represented as hex 6 Bit Map 10110101 Each bit value should be shown 7 Percent Numeric or string value has a value 0 100 0 No content unknown 0 1 UINT8 1 2 UINT16 2 3 INT32 4 4 Float 4 5 String 0 64 6 Binary 0 64 NOTE See Data T
82. f the data as the data provider packet will contain a data type of FF which indicates our internal control interface All other consumers will automatically reject the FF data type anyway So to control the provider we simply send a data provider packet using the same data tag but containing data of type FF the data consists of a single Function Byte which has fixed functionality depending on its value The status byte is not used and may be left at zero Value Fixed Universal Function None SLEEP PAUSE STAYAWAKE CONTINUE DOSYSTEMZERO REMOVESYSTEMZERO SHUNTCALON SHUNTCALOFF DOTARE REMOVETARE LEDONUNTILNEXTTX OO 0 NI ON OF LA wI N Using a Data Tag of FFFF will act as a broadcast data provider control interface and all recipients of an FFFF data tag will check the data type and if this is FF the device may perform the specified function To use this interface the sender must reply with the control interface packet within 8 milliseconds of receiving a Data Provider packet 81 Mantracourt Electronics Limited T24 Technical Manual Packet Data Status Data Function Type Tag Type Byte Mantracourt Electronics Limited T24 Technical Manual 82 Appendix B Radio Range When planning the installation of a radio net it is useful to consider a number of different arrangements and compare their relative merits before deciding on a final layout One aspect to be consider
83. ge of modules contact Mantracourt or refer to the following web site www ero dk ISO 9001 REGISTERED FIRM THE QUEEN S AWARDS D q FOR ENTERPRISE Pa 20 AS CE In the interests of continued product development Mantracourt Electronics Limited reserves the right to alter product specifications without prior notice DESIGNED amp MANUFACTURED IN THE UK Code No 517 908 Issue 2 4 09 09 10 Mantracourt Electronics Limited T24 Technical Manual 92
84. he PC will be identified by the port that they arrive on RS232 devices can only be connected one at time anyway but RS485 allows multiple devices on the same bus This is where the Addressing is vital as it is this that distinguishes between base stations When using USB base stations you may only ever have one T24 BSu connected to a PC at any time Using T24 BSi will allow multiple USB base stations to be connected to single PC Unique Addresses are again required in this instance Note that broadcast packets can be received by multiple base stations so packets may appear duplicated at the PC end It is also possible for the PC to route a packet through all connected base stations by Addressing a packet to Address 0 NOTE Although it is possible to connect multiple USB base stations to a PC the T24drv dll driver supplied by Mantracourt only supports one Base Station Addressed as 1 So when using a T24 BSi which supports USB but also has a DIP switch to allow Address setting the Address must be set to 1 The T24 BSu devices are manufactured with a fixed Address of 1 Mantracourt Electronics Limited T24 Technical Manual 14 Connection The interface can be selected from the DIP switches SW1 as can baudrates for serial interfaces and the Address of the base station SW1 Settings T24 BSi only Switch positions 1 to 4 select the base station Address This should normally be 1 Address 1
85. he reading must be steady to enable this key Pressing this key with an unstable reading will do nothing This transmits a Data Provider packet marked with a Data Tag held in FiDataTag and can also contain data as defined by F1Data Power Toggles between on and off Hold for 2 seconds to activate Key Operation when viewing an individual item Key Operation Sleep No effect Wake Will attempt to wake any sleeping devices Tare If sum was currently tared then this key will toggle between displaying gross or tared value of current device If sum view was displaying gross then this key has no effect If an external system zero is used then only gross values actually supplied to the handheld can be displayed Next Selects next device to view F1 If motion detection is activated then the reading must be steady to enable this key Pressing this key with an unstable reading will do nothing This transmits a Data Provider packet marked with a Data Tag held in F1DataTag and can also contain data as defined by F1Data Power Toggles between on and off Hold for 2 seconds to activate Communications To configure the device you will use the Read and Write mechanisms described in the Data Packet Structures section to read and write parameters and execute commands 55 Mantracourt Electronics Limited T24 Technical Manual Parameter List Parameter Command Description
86. ion 15 247 emissions T24 SAi and T24 Sae modules have been certified by the FCC for use with other products without any further certification as per FCC section 2 1091 Changes or modifications not expressly approved by Mantracourt could void the user s authority to operate the equipment In order to fulfil the certification requirements the OEM must comply with FCC regulations 1 The system integrator must ensure that the text on the external label provided with this device is placed on the outside of the final product 2 The T24 Sae module may be used only with Approved Antennas that have been tested by Mantracourt IC Labelling requirements for Industry Canada are similar to those of the FCC A clearly visible label on the outside of the final product enclosure must display the following text Contains Model RAD24 Radio 2 4 GHz 1C 7224A RAD24 Integrator is responsible for its product to comply with RSS 210 Low power Licence exempt Radio communication Devices All Frequency Bands Category Equipment RSS CE The T24 series has been certified for several European countries If the T24 SA is incorporated into a product the manufacturer must ensure compliance of the final product to the European harmonized EMC and low voltage safety standards A Declaration of Conformity must be issued for each of these standards and kept on file as described in Annex II of the R amp TTE Directive Furthermore the manufacturer must maintain a
87. ion 53 Read the firmware version FLOAT R Channel 11 Radio Channel UINT8 RW EncKey 15 The radio encryption key to operate on Requires BINARY RW power cycle or Reset to enable Not supported in this 16 Bytes release Power 12 Set or read the output power level 0 100 UINT8 RW Name 10 Set or read a user defined name 11 characters STRING RW 11 Bytes Model 51 Read the model number of the device STRING R 11 Bytes WakeChklnt 16 Set or read the interval in milliseconds that a sleeping UINT16 RW device will wake to request a full wake from the base station default 3000 UseCSMA 18 Select whether to use Carrier Sense Multiple Access UINT8 RW techniques on transmission 0 Disabled The Carrier Sense Multiple Access will be disabled NOT RECOMMENDED 1 Enabled The Carrier Sense Multiple Access will be enabled See Unslotted CSMA CA in Appendix A BattLevel 69 The voltage measured on the battery FLOAT R BattLowLevel 110 Set or read the battery voltage at which the low FLOAT RW battery flag will be set in all received packets and in the Status parameter LowPowerMode 75 Defines power save mode UINT8 RW 0 Awake all the time and transmit at TxInterval 1 Sleep Wake at TXInterval acquire value transmit value sleep TxInterval 76 Time Interval between Transmissions Set mS INT32 RW SampleTime 78 Set or read the SampleTime in milliseconds for UINT16 RW acquiring a reading at each TxInterval interval The
88. larger the SampleTime the more accurate the reading but at the expense of battery life Default 5 SleepDelay 77 Time period before switching to low power sleep mode UINT16 RW if no StayAwake command or trigger received Setting to zero disables DataTag 119 Set or read the 2 byte Data Tag that is used when UINT16 RW transmitting the weight in a Data Provider Packet Note that default value is set to last 2 bytes of ID NumCalPoints 79 Number of calibration points required Range 2 to 9 UINT8 RW Mantracourt Electronics Limited T24 Technical Manual 30 CalPoint1 80 The full scale value of this calibration point FLOAT RW CalPoint2 81 The full scale value of this calibration point FLOAT RW CalPoint3 82 The full scale value of this calibration point FLOAT RW CalPoint4 83 The full scale value of this calibration point FLOAT RW CalPoint5 84 The full scale value of this calibration point FLOAT RW CalPoint6 85 The full scale value of this calibration point FLOAT RW CalPoint7 86 The full scale value of this calibration point FLOAT RW CalPoint8 87 The full scale value of this calibration point FLOAT RW CalPoint9 88 The full scale value of this calibration point FLOAT RW CalPointGain1 89 The gain to apply to the input at this
89. lass and support USB 2 0 full speed interface 12mbits The USB connection will also power the base station USB Communications Using the Mantracourt T24drv dll driver is the easiest way to communicate with the base station However if you want to write your own communications software you will need the following information Vendor ID 6017 0x1781 hex Product ID 2980 OxBA4 hex Incoming packets are read from report 0 and contain 64 bytes of data There will always be 64 bytes of even if there is only a few bytes of valid data These bytes will need placing into a buffer and your software will need to detect and extract complete packets Outgoing data is written to report 0 and must always contain 64 bytes of data Any unused bytes should be set to zero Please note that 65 bytes of data are actually sent and received but the first byte indicates the report number so this is always zero Parameter Value Vendor ID 0x1781 6017 decimal Product ID OxBA4 2980 decimal Setup Class HIDClass Service Name HidUsb Parameter Value Connection Information ConnectionIndex Ox1 CurrentConfigurationValue 0x1 LowSpeed FALSE DevicelsHub FALSE DeviceAddress 0x1 NumberOfOpenPipes 0x2 Pipe 0 Endpoint Descriptor bLength 0x7 bEndpointAddress 0x1 OUT bmAttributes 0x3 USB ENDPOINT TYPE INTERRUPT wMax
90. line 12 of the serial output You STRING 32 RW can include text or tokens bytes Line13 81 Read or set the data for line 13 of the serial output You STRING 32 RW can include text or tokens bytes Line14 82 Read or set the data for line 14 of the serial output You STRING 32 RW can include text or tokens bytes Line15 83 Read or set the data for line 15 of the serial output You STRING 32 RW can include text or tokens bytes Line16 84 Read or set the data for line 16 of the serial output You STRING 32 RW can include text or tokens bytes Line17 85 Read or set the data for line 17 of the serial output You STRING 32 RW can include text or tokens bytes Line18 86 Read or set the data for line 18 of the serial output You STRING 32 RW can include text or tokens bytes Line19 87 Read or set the data for line 19 of the serial output You STRING 32 RW 65 Mantracourt Electronics Limited T24 Technical Manual can include text or tokens bytes Line20 88 Read or set the data for line 20 of the serial output You can include text or tokens STRING 32 bytes RW ExtZero 68 Read the value derived from another device when ExtZeroDataTag is set The system zero is a value contained in the data from an external device FLOAT ExtZeroDataTag 119 Set or read the 2 byte Data Tag of the Data Provider Packet that will supply a system zero value This value will be subtracted from the gross or net summed value
91. lt 5 KeyTest 64 Set or read the state of the keys Each time the keys UINT8 RW are pressed the equivalent bit will be set Set to zero to reset This property is used in ATE to test the keypad Timeout 65 Set or read the time in seconds that if exceeded UINT16 RW Mantracourt Electronics Limited T24 Technical Manual 60 between receiving Data Provider packets from the paired device will cause the display to show Default 3 range 0 to 65535 default 3 PairWait 67 Set or read the period in seconds that the handheld UINT8 RW will wait for another device to pair when placed into pair mode range 0 to 65535 default 5 Format 70 Set or read the format for the display Here you can STRING 8 RW define how the value will be displayed and where the bytes decimal point will appear By including a non zero value this will define the resolution of the displayed value e the smallest step size of value changes Default 0000 001 ZeroSupp 71 Set or read whether to show the value on the display UINT8 RW with zero suppression 0 No zero suppression 1 Zero suppression Overload 73 Set or read the value of the display above which FLOAT RW instead of the value being displayed Overload will be displayed DisplayUpdate 74 Set or read the interval between LCD updates Default UINT16 RW 300 ScalelnLo 75 Set or read a low input value at which you know what FLO
92. ly or batteries WARNING This module is not reverse polarity protected 41 Mantracourt Electronics Limited T24 Technical Manual WARNING The maximum voltage is 3 6V Battery Types Battery Type Alkaline Zn MnO Nickel Metal Hydride NiMh Nickel Cadmium NiCad Lithium Primary 3 6V Li SOCL Lithium Iron Disulphide Li FeS Lithium lon and Lithium Polymer LiON LiPo Notes Pairs of alkaline 1 5V cells are the most common Use D cells for maximum life and AA cells where space is restricted Example Varta 4014 D Varta 4006 AA Recommend T24 PSSA module to maximise usable capacity Most cells are 1 2V so two in series gives 2 4 Volts These can match alkaline batteries in capacity but as the charged voltage is lower they do not match the usable capacity These batteries self discharge at a faster rate than alkalines If charging these cells in circuit precautions must be taken to ensure that the maximum voltage on the T24 SA is not exceeded Example GP 270AAHC AA Recommend T24 PSSA module to maximise usable capacity Most cells are 1 2V so two in series gives 2 4 Volts Three in series can be used to give 3 6 Volts These do not have the usable capacity of an alkaline battery These are generally only useful if they are to be charged on a regular basis If charging these cells in circuit precautions must be taken to ensure that the maximum voltage on the T24 SA is not exceeded Example Recommend
93. mE mantracourt Wireless Telemetry Range 2 4Ghz 1 Introduction OverviewW 4 iie eee ee eer e opener rn ccsesccucdeecdsectieccseceueccueccdeccsecteseduecusecusecuseocsecuseee 5 2 4GHZ R dio Ge efal b UUUEU ME R 5 Communicating with T24 DeviceS ssssssssscseseceeeccccecccccccccececceccccececececceccececececeoeeeeseececeeesesseeee 5 Packet Typos As esee A A A AA EA E RED 5 Packet SUCIA A A AAA 5 Handling Base Station Data eorr eer cd OL a id 5 ERE A A A SAA AAA AA A a 5 Packet Type Byte ici dd EA 6 Data Packet Struct res ii ee RI E ERR e EEEE e E des E e eae aetna T ETE 7 Data Provideru a vos dete tv AS AS AAA EUN NA A EPISC MEN FA EEUAE 7 Packet Type iie er A A ERR SEEN A AA AE 7 Data Ta ra ER ade ne PERUENIRE QE FN naaa es le PI DEAE 7 SEAUUS dee CEP xc oth notte TEE 7 D ta Type oes O 7 DACA D eek 8 RSS los tada vo a ad 8 Vi A A A E a e iaa au sages aa 8 RA 8 Packet Type ici 8 RE 8 enn M 8 WILE so ei ata ee E RP ENTER RS EXE ESTA E A EYES EFE E E EISE Fede FEE UE RR Fed er VEEA HE TUS 8 Packet TYDE M 8 ue 8 COMME A A ET DE T 8 Data Typ A AAA A AA AAA AA AA 8 Responses to Read and Write esee dieerd o i etr s AS E nono nonn nono nor nor nor ehe ehe hern eres 9 ACK E RO O 9 Packet Type cie a A a a a a da ia deve 9 From eem 9
94. may have higher bits set which indicate Error Low Battery and Broadcast From ID This contains the ID of the device that sent the packet RSSI This indicates the signal strength that this packet was received at See RSSI amp CV in Appendix A Note Some versions of modules may not send the RSSI and CV bytes CV This indicates correlation value which equates to the quality of the signal when this packet was received See RSSI amp CV in Appendix A Note Some versions of modules may not send RSSI and CV bytes DATA INVALID This packet is returned if the device has been written to and the data written is invalid Packet Type From ID RSSI CV 0A 00 00 00 00 00 Packet Type This is OxA hex 10 decimal and may have higher bits set which indicate Error Low Battery and Broadcast From ID This contains the ID of the device that sent the packet RSSI This indicates the signal strength that this packet was received at See RSSI amp CV in Appendix A cv This indicates correlation value which equates to the quality of the signal when this packet was received See RSSI CV in Appendix A Pairing Pairing is a method of communicating between two devices so that they configure themselves to one or another s radio settings and enables them to identify each other by means of ID and default Data Tag Additionally the pairing mechanism can pause a device from performing its default behaviour as
95. n on and off Hold for 2 seconds to activate Mantracourt Electronics Limited T24 Technical Manual 54 Result Mode OpMode 1 Up to 12 individual devices can be summed and the result displayed If DoSleepWake is set then the handheld will wake all configured devices when turned on and send them to sleep again when turned off NOTE When the handheld wakes devices this achieved through the transmission of a broadcast wake i e all devices on the same channel and with the same encryption key will wake In this mode there is an option of retrieving a system zero value from an external source This is activated by supplying the Data Tag to the ExtZeroDataTag parameter When activated the value supplied by the Data Provider packet marked with this tag will be used as the system zero and will be subtracted from the sum of all contributing inputs Usually in this mode only the result is displayed In the initial devices the result will just be the sum but by holding the Next key for 65 seconds will activate the ability to step through each contributing input using the Next key See AllowNext Key Operation when viewing the sum Key Operation Sleep No effect Wake Will attempt to wake any sleeping devices Tare Toggle between displaying gross sum or tared sum Next No effect unless held for 5 seconds to activate individual item view This can be disabled by setting NoNext parameter F1 If motion detection is activated then t
96. n or calibration you should power cycle the paired device to return it to normal operation 13 Mantracourt Electronics Limited T24 Technical Manual T24 BSi and T24 BSu Base Station Overview These devices are base stations and interface between the radio and a physical interface for a connection to a PC PLC or other device Addressing Usually only a single base station is required in a telemetry installation If a telemetry device is outside the range of the base station a repeater may be deployed Some complex topologies may only be realized by using multiple base stations which may require changes to the Address switches See Multipoint Base Station Section Multipoint Base Stations Sometimes more than one base station is required in a system This may simply be a central PC with two base stations wired off in opposite directions i 7 i 7 Where one base station handles devices on the left and the other those on the right Multiple base stations allow flexibility in routing requests from a PC as each time a packet is sent to a base station it is targeted to a particular base station Address When a packet arrives back at a PC it contains the Address of the base station that routed it If a base station is the only one connected to a particular serial port then every base station can have Address 1 as the PC will send packets to a particular port to select which base station handles a packet likewise packets arriving back at t
97. nabled If the module was operating in low power mode you cannot communicate using the usual read write commands as 75 Mantracourt Electronics Limited T24 Technical Manual the module is mostly asleep so communications would be poor In this case we use the Data Provider Control Interface to pause the module This is a packet sent out as soon as a data provider packet is seen arriving Once the module is paused you can continue with the configuration After configuration and saving the module can be set running again with a targeted Continue Resume command or it can be reset Some changes may require a reset to activate NOTE modules do not sleep when in Paused mode so will not sleep due to a direct command nor when the SleepDelay period would normally trigger Therefore if you wish to send a module to sleep after configuration a sleep command should be sent followed by a continue resume command Data Acquisition If a module has been configured such that its battery life is acceptable for the given transmission rate it may be that it never has to enter deep sleep mode In this case the data provider packets are available to all devices at all times and no interaction is ever required i e transmission rate of 1 per second using a pair of AA batteries may yield 2 5 months of continuous operation When this battery life is not enough it can be extended by sending the acquisition module to sleep when it is not required Thus the above example when u
98. ncais Cet appareil est conforme aux exigencies essentialles et aux autres dispositions pertinantes de la Directive 1999 5 EC slenska essi b na ur samr mist l gbo num kr fum og rum kv um tilskipunar 1999 5 ESB Italiano Questo apparato conforme ai requisiti essenziali ed agli altri principi sanciti dalla Direttiva 1999 5 EC Nederlands Deze apparatuur voldoet aan de belangrijkste eisen en andere voorzieningen van richtlijn 1999 5 EC Norsk Dette utstyret er i samsvar med de grunnleggende krav og andre relevante bestemmelser i EU directiv 1999 5 EC Portugu s Este equipamento satisfaz os requisitos essenciais e outras provis es da Directiva 1999 5 EC Suomalainen T m laite t ytt direktiivin 1999 5 EY oleelliset vaatimukset ja on siin asetettujen muidenkin ehtojen mukainen Svenska Denna utrustning r i verensst mmelse med de v sentliga kraven och andra relevanta best mmelser i Direktiv 1999 5 EC This equipment is in compliance with the essential requirements and other relevant provisions of Directive 1999 5 EC FCC FE Family RAD24 Models i and e for internal and external antenna variants For antenna T24 ANTA and T24 ANTB FCC ID VHARAD24 This device complies with Part 15c of the FCC Rules Operation is subject to the following two conditions 1 this device may not cause harmful interference and 2 this device must accept any interference received including interference that may
99. ne 68 Print Gross Sum of 2 Devices To Printer cccccccee serros ss sretna E REEE ESET ETAS ER EEEE E SaaS 68 Customer Ticket From Handheld Device ssssssescessscsssscsssccssecssscsssscoseccssecossscessccseecoseeesseee 69 LED Mode Indication ra RR wane ve IRA X SESS RN SAESERY Gane YRPSSNRVR AX VOS NR CAYAERES C NR SY 69 Power Supply iaie eo pero a e RA RR A RA E Re e ODER uH 69 Installation sio 69 Connections a oo de e ES EA NRI OUS HIC ES EDO HU ROS do don de dr d RO OUS A RAUS CARN CN 70 Serial Settings IM E 70 T24 A01 Analog Output 5 0 40 122019 ii iii 71 OVervieW o cce pee ce tet Rete e BE CO ee RU ee eei Ere Petre ie ro eC Qe Ce e e eU e eret 0 Sa v e e HER eek e ere Re 71 CONAN aire 71 Communications A A ees eee ed ee ee ee e eeu ee et ee ve e e ee ais 71 Parameter Listes iiie AAA ERR ERIT RR EET 71 Connections 44 0 A RA RR RR ERR RR RR E RR E RA RR RR ER ANNE EE E RE E EA E RC E EET 73 Output Range Settings e eres aio desis ae oe biting dete tore de sy sing ede aid ie aa oie Fase ch ne Ferner he aho 74 Appendibx 2 54 cde se eres coe re esee cieessccdesecsccosuessactocessacesuesiecdadessaceauedcactetesvacesasdiactescsvacees 75 Communications Software Overview csssseeessssseseeeee eese nnne sehe s sese eese n essere essere 75 Operational Modes OPEER 75 PS A AAA 75 Default RUNNING vitara An AN AN dan E S 75 t I dias 75
100. o providing a low quiescent current 3 3V regulator to supply the T24 SA This overcomes the max voltage limitation of the T24 SA and the higher cell voltage and charging requirements of the Lithium lon cell Battery Life Rough Guide As a rough guide battery life of a T24 SA connected to a 1K load cell with a 5 millisecond sample time is as follows Years Usable Battery Capacity 10 TX per second Example of 2 X AA GP 15A with a usable capacity of 1 9Ah The loadcell is 1K and the transmission rate is 3Hz with a 5 millisecond sample time Years Lio Years 0 063 23 1 days 25 Mantracourt Electronics Limited T24 Technical Manual As can be seen below from an actual measured device on continuously this rough calculation is quite close 32 2 X AA Alkaline Battery Discharge 3Hz Power Save p Mode E 0 12 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 It must be remembered that this calculation is for when the device is continuously on and not sent to deep sleep So if the above device was used with a handheld and woken up 5 times a day for 5 minutes each time the total usage in a 24 hour period would be B X 5 e 5 mias c 0 216 laws So we are only using a fraction of the daily 24 hours so battery life will be 24 0 416 times the continuously on life i e DA y ai S7 So SUSO X DS ceys 15350156 CES Or 44 3 months Ois Over 3 and a half years
101. of V5 This is specified using zeros and a decimal point i e 000 0000 STRING 9 bytes RW Format 115 Read or set the format of the output value of lt V6 gt This is specified using zeros and a decimal point i e 000 0000 STRING 9 bytes RW Format7 116 Read or set the format of the output value of V7 This is specified using zeros and a decimal point i e 000 0000 STRING 9 bytes RW Format8 117 Read or set the format of the output value of V8 This is specified using zeros and a decimal point i e 000 0000 STRING 9 bytes RW FormatSum 118 Read or set the format of the output value of the GRO and NET tokens This is specified using zeros and a decimal point i e 000 0000 STRING 9 bytes RW ValueDataTag1 120 Read or set the 2 byte Data Tag of the Data Provider Packet that the device uses as input 1 This will be stored in Value 1 and is available to the token V1 and the summing tokens GRO and NET Leave as 0x00 to disable UINT16 RW ValueDataTag2 121 Read or set the 2 byte Data Tag of the Data Provider Packet that the device uses as input 1 This will be stored in Value 1 and is available to the token V1 and the summing tokens GRO and NET Leave as 0x00 to disable UINT16 RW ValueDataTag3 122 Read or set the 2 byte Data Tag of the Data Provider Packet that the device uses as inpu
102. omponent of the Electro Magnetic EM wave in one plane and the magnetic component in the other Polar diagrams identify these two components as E for electric and H for magnetic If the electric component of the EM wave is vertical then the antenna is said to be vertically polarised and vice versa There are some exceptions to this such as crossed and circular polarisation but for the sake of simplicity they are not considered here For maximum power transfer all antennas on the same radio net must be mounted so that their signals have the same polarisation it is sometimes possible to take advantage of this to allow operation of adjacent but otherwise unconnected radio nets on the same channel by having the antennas on one net vertically polarised and the other horizontally polarised Mounting Requirements Objects or structures within the operating region of the antenna will distort the horizontal and vertical space pattern so that the antenna polar diagram no longer represents the actual coverage For this reason antennas should be mounted to maximise separation from buildings or structures and away from areas where large objects may be temporarily placed This is usually achieved by fixing the antenna to a mast or tower by means of a bracket that allows adjustment of antenna orientation The mounting method should also allow for adjustment of height as very often a small change in antenna elevation will improve signal strength Receiver Input
103. on would normally be burned to a CD so the structure would look like this Le setup exe Ly Custom config ini amp SGDImage jpg To customize multiple modules just add them to the appropriate sections in the config ini file Alias T24 SA SGD 990 T24 SO SOD 990 Description T24 SA SGD 990 Force Measurement Device T24 SO SOD 990 PLC Gateway Image T24 SA SGDImage jpg T24 SO SODImage jpg NOTE The image files should have maximum dimensions of 220 pixels wide and 300 pixels high although if they are larger than this the toolkit will rescale them to fit A smaller file takes up less space installs and displays quicker 89 Mantracourt Electronics Limited T24 Technical Manual Appendix D Approvals CE Complies with EMC directive 2004 108 EC The Radio Equipment and Telecommunications Terminal Equipment R amp TTE Directive 1999 5 EC European Community Switzerland Norway Iceland and Liechtenstein English This equipment is in compliance with the essential requirements and other relevant provisions of Directive 1999 5 EC Deutsch Dieses Gerat entspricht den grundlegenden Anforderungen und den weiteren entsprecheneden Vorgaben der Richtlinie 1999 5 EU Dansk Dette udstyr er i overensstemmelse med de vaesentlige krav og andre relevante bestemmelser i Directiv 1999 5 EF Espa ol Este equipo cumple con los requisitos esenciales asi como con otras disposiciones de la Directive 1999 5 EC Fra
104. onfigure the required output range the DIP switches SW2 require setting as follows To access the DIP switches you will need to remove the cover from the case SW2 Switch Settings Range 1 2 3 4 5 6 7 8 0 10 V ON OFF OFF X X OFF ON OFF 10 V OFF OFF ON X X OFF ON ON 0 5 V ON ON OFF X X OFF OFF OFF 5V ON OFF ON X X OFF OFF ON 0 20 mA Sink X X X OFF ON ON OFF OFF 0 20 mA X X X ON OFF ON ON OFF Source 4 20 mA Sink X X X OFF ON ON OFF ON 4 20 mA X X X ON OFF ON ON ON Source Where X Don t care Mantracourt Electronics Limited T24 Technical Manual Appendix A Communications Software Overview Every T24 module has a unique 3 byte ID This is represented by a 6 character hexadecimal number on its yellow label Acquisition modules also have a Data Tag which is a 2 byte identifier and defaults to the last 2 bytes of the ID or the last 4 hexadecimal digits This Data Tag is used to identify data that is transmitted by the modules in their operational mode Operational Modes Acquisition devices that supply data have 3 main modes of operation Deep sleep The module is effectively off and draws negligible power from the battery but cannot be communicated with Except to wake it Default Running This default mode is how the module operates when power is applied initially The module transmits its
105. operate on Requires BINARY RW power cycle or Reset to enable Not supported in this 16 Bytes release Power 12 Set or read the output power level 0 100 UINT8 RW Name 10 Set or read a user defined name 11 characters STRING RW 11 Bytes Model 51 Read the model number of the device STRING R 11 Bytes WakeChkInt 16 Set or read the interval in milliseconds that a sleeping UINT16 RW device will wake to request a full wake from the base station default 3000 UseCSMA 18 Select whether to use Carrier Sense Multiple Access UINT8 RW techniques on transmission 0 Disabled The Carrier Sense Multiple Access will be disabled NOT RECOMMENDED 1 Enabled The Carrier Sense Multiple Access will be enabled See Unslotted CSMA CA in Appendix A BattLevel 69 The voltage measured on the battery FLOAT R BattLowLevel 110 Set or read the battery voltage at which the low FLOAT RW battery flag will be set in all received packets and in the Status parameter LowPowerMode 75 Defines power save mode UINT8 RW 0 Awake all the time and transmit at TxInterval 1 Sleep Wake at TXInterval acquire value transmit value sleep TxInterval 76 Time Interval between Transmissions Set mS INT32 RW SampleTime 78 Set or read the SampleTime in milliseconds for UINT16 RW acquiring a reading at each TxInterval interval The larger the SampleTime the more accurate the reading but at the expense of battery life Default 5 SleepDelay 77 Time period before switching to low p
106. or Reset to enable EncKey 15 The radio encryption key to operate on Requires power BINARY 16 byte RW cycle or Reset to enable 16 bytes Not supported in this release Power 12 Set or read the output power level 0 100 UINT8 RW Name 10 Set or read a user defined name 11 characters STRING 11 byte RW WakerDuration 17 Set or read the duration in milliseconds to wait for a UINT16 RW device to wake Model 51 Read the model number of the device STRING 9 bytes R UseCSMA 18 Select whether to use Carrier Sense Multiple Access UINT8 RW techniques on transmission 0 Disabled The Carrier Sense Multiple Access will be disabled NOT RECOMMENDED 1 Enabled The Carrier Sense Multiple Access will be enabled See Unslotted CSMA CA in Appendix A Reset 54 Restarts the device and utilises new channel and Command encryption keys if those have been changed and saved Note after a Reset the device will be asleep Save 55 Save any changes made to parameters Required before Command 71 Mantracourt Electronics Limited T24 Technical Manual power cycling or issuing a Reset command Requires 500mS recovery time after executing SelectedRange 60 Returns the currently selected output range UINT8 R 0 OV to 5V 1 5V to 5V 2 OV to 10V 3 10V to 10V 4 0 to 20mA
107. ovider packet to use as the input value 1 ValuelD7 107 Set or read the ID of the device acting as input 1 Used BINARY 3 RW to wake the remote device when Wake key pressed in Bytes Items Mode ValueDataTag8 88 Set or read the 2 byte Data Tag that is used to match a UINT16 RW Data Provider packet to use as the input value 1 ValuelD8 108 Set or read the ID of the device acting as input 1 Used BINARY 3 RW to wake the remote device when Wake key pressed in Bytes Items Mode ValueDataTag9 89 Set or read the 2 byte Data Tag that is used to match a UINT16 RW Data Provider packet to use as the input value 1 ValuelD9 109 Set or read the ID of the device acting as input 1 Used BINARY 3 RW to wake the remote device when Wake key pressed in Bytes Items Mode ValueDataTag10 90 Set or read the 2 byte Data Tag that is used to match a UINT16 RW Data Provider packet to use as the input value 1 ValuelD10 110 Set or read the ID of the device acting as input 1 Used BINARY 3 RW to wake the remote device when Wake key pressed in Bytes Items Mode ValueDataTag11 91 Set or read the 2 byte Data Tag that is used to match a UINT16 RW Data Provider packet to use as the input value 1 ValuelD1 1 111 Set or read the ID of the device acting as input 1 Used BINARY 3 RW to wake the remote device when Wake key pressed in Bytes Items Mode ValueDataTag12 92 Set or read the 2 byte Data Tag that is used to match a UINT16 RW Data Provider pa
108. ower sleep mode UINT16 RW if no StayAwake command or trigger received Setting to zero disables DataTag 119 Set or read the 2 byte Data Tag that is used when UINT16 RW transmitting the weight in a Data Provider Packet Note that default value is set to last 2 bytes of ID NumCalPoints 79 Number of calibration points required Range 2 to 9 UINT8 RW 21 Mantracourt Electronics Limited T24 Technical Manual CalPointMVV1 80 The MV V value of this calibration point FLOAT RW CalPointMVV2 81 The MV V value of this calibration point FLOAT RW CalPointMVV3 82 The MV V value of this calibration point FLOAT RW CalPointMVV4 83 The MV V value of this calibration point FLOAT RW CalPointMVV5 84 The MV V value of this calibration point FLOAT RW CalPointMVV6 85 The MV V value of this calibration point FLOAT RW CalPointMVV7 86 The MV V value of this calibration point FLOAT RW CalPointMVV8 87 The MV V value of this calibration point FLOAT RW CalPointMVV9 88 The MV V value of this calibration point FLOAT RW CalPointGain1 89 The gain to apply to the input at this calibration point FLOAT RW CalPointGain 90 The gain to apply to the input at this calibration point FLOAT RW CalPointGain 91 The gain to apply to the input at this calibration point FLOAT RW CalPointGain
109. p Antenna There must be no metal objects within 7mm of the antennas long edge and 20mm from the short edges See diagram below h I A E E amp I b Y N A A 7 mm J gt y N N 1 N E o A x 2 W me Mantracourt Electronics Limited T24 Technical Manual 46 External Antennas The external antennas come in two styles The flat PCB antenna can be mounted inside a plastic housing or to the outside of a metal housing The PCB requires 3mm Clearance on all edges this also applies to the RF window 1 64 mm J E a E b E b 4 S a b y y ld gt 58 mm The bulkhead mounting antenna can be used with metal or plastic housings Care must be taken when mounting the Antenna to ensure the installation does not become directional 47 Mantracourt Electronics Limited T24 Technical Manual T24 SAf Strain Acquisition Fast Overview The T24 SAf is a strain acquisition module offering high speed wireless acquisition This allows wireless remote viewing of strain gauge information using 2 4GHz radio The T24 SAf acquires the weight information from the strain gauge and transmits 10 readings per packet at a rate of 200 packets per s
110. point FLOAT RW CalPoint8 87 The full scale value of this calibration point FLOAT RW CalPoint9 88 The full scale value of this calibration point FLOAT RW CalPointGain1 89 The gain to apply to the input at this calibration point FLOAT RW CalPointGain 90 The gain to apply to the input at this calibration point FLOAT RW CalPointGain 91 The gain to apply to the input at this calibration point FLOAT RW CalPointGain 92 The gain to apply to the input at this calibration point FLOAT RW CalPointGain 93 The gain to apply to the input at this calibration point FLOAT RW CalPointGain 94 The gain to apply to the input at this calibration point FLOAT RW CalPointGain 95 The gain to apply to the input at this calibration point FLOAT RW CalPointGain 96 The gain to apply to the input at this calibration point FLOAT RW CalPointGain 97 The gain to apply to the input at this calibration point FLOAT RW CalPointOffset1 98 The offset to apply to the input at this calibration FLOAT RW point CalPointOffset2 99 The offset to apply to the input at this calibration FLOAT RW point CalPointOffset3 100 The offset to apply to the input at this calibration FLOAT RW point CalPointOffset4 101 The offset to apply to the input at this calibration FLOAT RW point CalPointOffset5 102 The offset to apply to the input at this calibration FLOAT RW point CalPointOffset6 103 The offset to apply to the input at this calibration FLOAT RW point CalPointOffset7 10
111. r radios in Bi a landscape aspect Specification Parameter Minimum Typical Maximum Units Notes T24 BSi External Supply 12 32 Volts voltage Range T24 BSi T24 BSu USB 4 875 5 5 125 Volts As defined by USB 2 0 Supply Range Specification Average Operational TBD 500 mA Current T24 BSi USB Bus Powered 100 200 Operational Current Operating Temperature 40 65 Deg C Range Storage Temperature 40 65 Deg C Range Reverse polarity E 32 Volts Maximum Supply level Protection Mantracourt Electronics Limited T24 Technical Manual 20 T24 SA Strain Acquisition Overview The T24 SA is a strain acquisition module This allows wireless remote viewing of strain gauge information using 2 4GHz radio The T24 SA acquires the weight information from the strain gauge and periodically transmits it Between transmissions the device is optionally in a power saving sleep mode to conserve batteries Communications To configure the device you will use the Read and Write mechanisms described in the Data Packet Structures section to read and write parameters and execute commands Parameter List Parameter Command Description ID Read the unique identifier ID for this device 3 bytes BINARY 3 bytes Version 53 Read the firmware version FLOAT R Channel 11 Radio Channel UINT8 RW EncKey 15 The radio encryption key to
112. r using 25 line data parameters which can include free text or tokens which can represent real data i e V1 would be decoded as the value from input 1 when the output is triggered Note each parameter can contain multiple lines so an actual printed output can exceed 25 lines The serial output can consist of a single line of data suitable for feeding into an LED display module or a more complex multi line result that can contain a mixture of fixed and variable data suitable for tickets receipts etc for printed output Configuration Once it has been determined how many devices are feeding data to this device you need to know the Data Tag that each of these devices are attaching to their Data Provider packets These Data Tags are then entered into the ValueDataTagx parameters Once the rate at which this data arrives is known you can also enter the Timeoutx values Leave unused ValueDataTagx parameters with a value of zero to ensure that they are not checked for timeouts and do not contribute to gross or net sums When a data provider packet arrives whose Data Tag matches one of those in the ValueDataTagx parameters the value it contains will be placed in the Valuex parameter If data does not arrive from a device within the Timeoutx period then any reference to either the individual Vx tokens or one of the summing tokens will result in rather than a numeric value The actual serial output can now be constructed using Line1 to Line20
113. s This allows the same T24 SO assembly to be used with different sets of data providers each supplying its own system zero value UINT16 RW PrintDataTag 128 Set or read the 2 byte Data Tag of the Data Provider Packet that will trigger a print The value contained in this packet can be referenced using the F1 token UINT16 RW LineDelay 130 Reads or sets the number of milliseconds between each line being sent out This is useful to control the rate that a page is sent to a printer for example UINT16 RW MinInterval 131 Set or read the sets the minimum interval between Prints UINT16 RW LogNumber 132 Set or read the log number that will be used next time a Print output is generated FLOAT RW LogDigits 133 Set or read the number of digits to display the log number as UINT8 RW NVLog 149 Set or read whether to store the log number between power cycles As this writes to flash each time the lt LOG gt token is referenced it is recommended that this is set to zero Off if the log number is referenced at a rate greater then every 30 seconds UINT8 RW Duplicate 134 Set or read whether to generate two Print outputs for every trigger This can be used with printers that do not have carbon copy capability UINT8 RW SwitchMode 135 Set or read the action to take when the switch input is activated
114. s an INT32 See Appendix A and these are followed by the timestamp formatted as a UINT16 Data Tag Data Type Timestamp cv epson Value1 Value3 Value8 Value10 25 25 01 A3 FF FF 02 06 BC AZ CA 86 BC 9C F1 23 BC 9C 73 90 C1 C7 88 56 C1 C7 87 76 41 28 FS CC 00 02 EB ES DE 96 Length Status Value2 Value9 vi Packet Type Checksum 49 Mantracourt Electronics Limited T24 Technical Manual Measurement Resolution The noise free resolution is 15 5 bits 1 50 000 Power Supply Attach power supply wiring to the module as shown below 3V Supply OV Supply Connect to a 3 Volt power supply or batteries WARNING This module is not reverse polarity protected WARNING The maximum voltage is 3 6V Installation Antennas Internal Chip Antenna There must be no metal objects within 7mm of the antennas long edge and 20mm from the short edges See diagram below p 20 mm 20 mm Mantracourt Electronics Limited T24 Technical Manual 50 External Antennas The external antennas come in two styles The flat PCB antenna can be mounted inside a plastic housing or to the outside of a metal housing The PCB requires 3mm Clearance on all edges this also applies to the RF window 1 64 mm J
115. sed for 10 sessions lasting 6 minutes each per day utilising sleeping and waking will yield a battery life of 4 5 years It is recommended that the acquisition modules take advantage of the SleepDelay parameter which sets a period which once expired without the module receiving a KeepAwake command will cause the module to return to deep sleep mode This ensures that the modules return to sleep even if communications is lost with the controller So we will look at an example scenario where an acquisition module sits in deep sleep for most of the day An operator then uses a device to wake the module take a few readings then sends the module back to sleep again The module can be woken with either a broadcast WAKE or a WAKEBYID If a broadcast wake is used then ALL modules on the same radio channel will wake If you target the wake to a specified ID then only that module will wake Once woken the module will be operating in default running mode and will transmit its value at the configured rate Because we have activated the SleepDelay in the module we may need to issue STAYAWAKE commands to stop the module returning to deep sleep mode NOTE this may not be required if for example a SleepDelay of 30 seconds is used and you just rely on this to send the module to sleep This is OK if the duration of the session is known to be less than the SleepDelay time If not then use the STAYAWAKE commands to keep the modules awake until finished with To issue STA
116. ship between receiver input power and RSSI an input level of 77 22dBm will result in an RSSI between 80 and 85 85 Mantracourt Electronics Limited T24 Technical Manual Antenna Basics Gain For a particular antenna the stated gain figure applies only along the antenna bore sight and often only in one plane if the remote point is off axis relative to the antenna electrical centre line or bore sight then the gain will depend on the degree of offset according to the polar diagram for that antenna For example an antenna is advertised as having a gain of 12dBi and a beam width of 60 degrees this is normally taken to refer to the half power or 3dB beam width In other words the antenna gain at 30degrees off the bore sight will be 3db down on the peak gain or 9dBi Beyond 30 degrees off axis the gain will be very much less For short vertical antennas of the rubber duck type the gain is fairly constant in the horizontal plane but the vertical beam width may be as little as 12 degrees for a 9dB antenna making it necessary to mount the antenna slightly off vertical for best signal strength in a specific area this of course means that the pattern on the opposite side might now be pointing into the ground or up in the air Polarisation Antenna polar diagrams show coverage in terms of variations in gain over vertical and horizontal planes relative to the antenna Depending on its method of construction the antenna will radiate the electric c
117. some devices operate in a low power mode where they are mostly asleep This makes communications impossible so the pairing process stops the low power behaviour The pairing process is usually initiated by one device a handheld for example or PC software using a base station and this enters pairing master mode and is ready to pair for a user defined time period 11 Mantracourt Electronics Limited T24 Technical Manual Next the other device is put into its pair mode at which time it negotiates with the other device and they will decide on what to do based on their function Devices are normally put into pair mode by power cycling them Please refer to the device documentation For the scope of this document we are concerned with manually controlling the pairing using a base station You would use pairing for the following reasons W You have a device whose communications settings are unknown W You want to connect to a device that operates in low power mode and is mostly asleep B The device you want to talk to may have a normal operational function that you want pausing while you configure it WB You just want to change the communications settings of a device to match it to a base station settings Pair Request Packet Type Data Tag Direction Config Duration optional 13 00 00 00 00 00 Packet Type This is 0x13 hex 19 decimal Data Tag You need to supply a Data Tag which may be useable by th
118. ssed on the T24 HS it will turn off after 5 minutes The handheld can operate in two modes The operation of the buttons and the automatic sleep wake functions are dependant on these modes To attach devices to the handheld we must first ensure that the appropriate devices are transmitting their values at a suitable rate such as the default of 3 per second Then we can tell the handheld which devices we want to communicate with by either automatic pairing or manual setting of the parameters Automatic Pairing The handheld supports pairing replace an existing device i e initially the handheld would be configured using manual configuration If then a T24 SA device required replacing and this was item 3 in the handheld we would follow the following procedure W First select this device even though the display may show because of no communications In Result mode you would have to hold the Next key to enable selection of individual devices E Next turn off the handheld then press and hold the Power key then press and hold the Tare key Now both keys are held down until PAIRING is seen on the display The keys can now be released W Now apply power to the T24 SA within 10 seconds W f unsuccessful the display will show failed If successful the Data Tag and ID of the new device will have been configured within the handheld W Depending on how the replacement device was configured it may be necessary to reapply the system zero Manual Configura
119. t take the sum of all the gains and then subtract the sum of all the losses 87 Mantracourt Electronics Limited T24 Technical Manual Power Density From the radar equation power density at the target is given by Pd PT GT Ze Where Pd Power density in W m2 PT Transmitter output power in Watts GT Antenna gain as a multiple of input power r Range to target in metres From the Rad24 radio specifications Power output is 1mW Peak Chip antenna peak gain is 3dBi or 2 times the input power Measurement range is 20cm or 0 2m Exe cs AALO 3 X 2 125560 052 Pd Se ST seo S Wa Pd at 20cm range is 3 978mW m2 Dividing this by 10 000 to express power density in W cm2 gives 397 8nW cm2 This is the peak power density assuming the RF output is 1mW Continuous Wave multiply this figure by the duty cycle and the average power density is reduced proportionately Further this calculation uses the peak gain of the chip antenna stated as 3dBi in the manufacturers data sheet in practice this gain is rarely achieved being nearer to 1 to 1 5dBi RF Exposure Limits Power density at the Rad24 Antenna is well below the Whole Body Average SAR Specific Absorption Rate of 80mW Kg exposure limit given at ANSI IEEE C95 1 2005 and OET Bulletin 65 Edition 97 01 dated August 1997 Under the terms of FCC CFR Title 47 Volume 1 Part 2 1091 and Part 2 1093 this equipment is categorically excluded from routine environmental evaluation for
120. t 1 This will be stored UINT16 RW Mantracourt Electronics Limited T24 Technical Manual 64 in Value 1 and is available to the token V1 and the summing tokens GRO and NET Leave as 0x00 to disable ValueDataTag4 123 Read or set the 2 byte Data Tag of the Data Provider UINT16 RW Packet that the device uses as input 1 This will be stored in Value 1 and is available to the token V1 and the summing tokens GRO and NET Leave as 0x00 to disable ValueDataTag5 124 Read or set the 2 byte Data Tag of the Data Provider UINT16 RW Packet that the device uses as input 1 This will be stored in Value 1 and is available to the token V1 and the summing tokens GRO and NET Leave as 0x00 to disable ValueDataTag6 125 Read or set the 2 byte Data Tag of the Data Provider UINT16 RW Packet that the device uses as input 1 This will be stored in Value 1 and is available to the token V1 and the summing tokens GRO and NET Leave as 0x00 to disable ValueDataTag7 126 Read or set the 2 byte Data Tag of the Data Provider UINT16 RW Packet that the device uses as input 1 This will be stored in Value 1 and is available to the token V1 and the summing tokens GRO and NET Leave as 0x00 to disable ValueDataTag8 127 Read or set the 2 byte Data Tag of the Data Provider UINT16 RW Packet that the device uses
121. t this calibration FLOAT RW point Value 72 Reads the user calibrated output FLOAT R Counts 70 Raw A D counts INT32 R PFS 71 Factory calibrated percent full scale 0 0V 100 10V FLOAT R DigitalOut 108 Read or set the digital output state FLOAT RW 0 Turn digital output off 1 Turn digital output on 2 Make digital output mirror the LED state V1 05 and later Status 74 Live status where the bit values indicate status The following table shows the decimal bit values and their meaning 1 STATUS SHUNT CAL 2 STATUS INPUT INTEGRITY 4 Reserved 8 Reserved 16 STATUS POWER UP 32 STATUS BATT LOW 64 STATUS DIGITAL INPUT 128 STATUS DIGITAL OUTPUT Reset 54 Restarts the device and utilises new channel and Command encryption keys if those have been changed and saved 31 Mantracourt Electronics Limited T24 Technical Manual Save 55 Save any changes made to parameters Required Command before power cycling or issuing a Reset command Requires 500mS recovery time after executing Wake 50 Wake the module from sleep Command Sleep 56 Sends the module to Sleep Command Pause 57 Stops the output streaming to allow configuration Command Resume 59 Streaming continues Command StayAwake 58 No function other than to reset SleepDelay timer Command SleepTrigger 120 Enter Data Tag to watch for that will trigger sleep UINT16 RW mode PauseTrigger 121 Enter Data Tag to watch for that will trigger pause UINT16 RW
122. ta packets arriving PairWait 107 The time to wait in seconds when pairing after pressing the UINT8 RW Pair switch BoundDataTag 108 The Data Tag of the data being used to set the output UINT16 RW ZeroValue 109 Set or read the system zero value which is subtracted from FLOAT RW the value of the data arriving before mapping to the analog output DoWake 110 Whether to wake paired module on power up 1 or 0 UINT8 RW BoundID 111 Set or read the ID of the bound device Used to wake the BINARY 3 Bytes RW remote device NOTE All changes require a SAVE command to enable them to survive through power cycle or RESET command Connections Depending on the analog output device you have you will need to refer to one of the two following diagrams T24 AO1 T24 AOfi ON sw2 PHOTO 12345678 DE Vout 2 Vout I Sink B ISink y I Source S Moge I Source aL UR O Timeou Ma Pe O Emo Q PAIR ic O Batt Low mrsrTmyTRTE ON swe HE 12345678 Vout _ Vout po O o GND I Sink lo Lm j Timeout I Sink Lo PAIR D Error I Source gt O Mode Batt Low I Source o ir M 9 to 36V dc OV d E v Supply V la Error A O Batt Low Input Zero 73 Mantracourt Electronics Limited T24 Technical Manual Output Range Setting To c
123. the Output Minimum and Maximum Values The analogue output is updated at a rate configured by the acquisition module TXInterval LED s and in the case of the T24 AO1i open collector outputs provides indication of the state of the radio link remote battery life and remote status A digital Input allows for zeroing of the incoming data value Configuration The T24 AO1 is configured by setting the Data Tag of the device whose data you wish to reflect onto the analog output Once you know the data tag you then need to work out which calibrated values from the acquisition module you want represented by the selected analog output minimum and maximum levels For example A T24 SA has been calibrated to give O to 10 tonnes output You have selected a 4 20mA analog output and want the output to give 4mA at 0 tonnes and 20mA at 8 tonnes Simply set the In Minimum to 0 and In Maximum to 8 Next you set the desired actions when errors occur Communications To configure the device you will use the Read and Write mechanisms described in the Data Packet Structures section to read and write parameters and execute commands Parameter List Parameter Comma Description Native Data nd Type ID 3 Read the unique identifier ID for this device 3 bytes BINARY 3 byte Version 53 Read the firmware version FLOAT R Channel 11 The radio channel to operate on 1 16 Requires power UINT8 RW cycle
124. the model number of the device STRING R 11 Bytes InputValue 60 The value that is being read by the device FLOAT R DisplayValue 61 The value being displayed by the device FLOAT R UseCSMA 18 Select whether to use Carrier Sense Multiple Access UINT8 RW techniques on transmission 0 Disabled The Carrier Sense Multiple Access will be disabled NOT RECOMMENDED 1 Enabled The Carrier Sense Multiple Access will be enabled See Unslotted CSMA CA in Appendix A BattLevel 69 The voltage measured on the battery FLOAT R OffDelay 62 Time period in minutes before switching off if no UINT16 RW button is pressed Setting to zero disables range 0 to 1440 default 5 BoundDataTag 68 Set or read the 2 byte Data Tag that is used to match a UINT16 RW Data Provider packet to use as the display value BoundID 69 Set or read the ID of the bound device Used to wake BINARY 3 RW the remote device Bytes AutoZero 63 Set or read the value limit which may be automatically FLOAT RW zeroed on startup When the handheld powers up and the input value is within AutoZero then the display will be zeroed The value of the input will be placed in AutoZero i e from this time onwards until powered off the display will show input value AutoZero DoSleepWake 64 Set or read whether to perform wake and sleep on the UINT8 RW paired device when the handheld is powered up and down range 0 to 1 default 1 Timeout 65 Set or read the time in seconds that if exceeded UINT16 R
125. ther to use Carrier Sense Multiple Access UINT8 RW techniques on transmission 0 Disabled The Carrier Sense Multiple Access will be disabled NOT RECOMMENDED 1 Enabled The Carrier Sense Multiple Access will be enabled See Unslotted CSMA CA in Appendix A Power 12 Set or read the output power level 0 100 UINT8 RW Name 10 Set or read a user defined name 11 characters STRING 11 RW bytes WakerDuration 17 Set or read the duration in milliseconds to wait for a UINT16 RW device to wake Although WAKE commands are sent to the target device the base station actually intercepts this and handles the wake itself Default 12000 milliseconds Save 24 Save any changes made to parameters Required Command before power cycling or issuing a Reset command Requires 200mS recovery time after executing Reset 25 Restarts the device and utilises new channel and Command encryption keys if those have been changed and saved Note after a Reset the device will be asleep NOTE All changes require a SAVE command to enable them to survive through power cycle or RESET command 19 Mantracourt Electronics Limited T24 Technical Manual Installation The base T24 BSi should be mounted horizontally on a wall or ceiling so that the side face containing the PCB antenna faces the general direction of the target devices i The T24 BSu should also be positioned to present itself to the othe
126. tion Use the parameters ValueDataTag1 through to ValueDataTag12 and ValuelD1 through to ValuelD12 and enter the Data Tags and IDs of the devices to connect to For example to sum two T24 SA devices whose Ids are FFF123 and FFFABC The default data tags for these devices would be F123 and FABC so we would set the following ValueDataTag1 F 123 ValuelD1 FFF123 ValueDataTag2 FABC ValuelD2 FFFABC We would ensure that the other unused ValueDataTagx and ValuelDx parameters were set to zero Available Modes Item Mode Opmode 0 Up to 12 individual devices can be connected to and the user can step through each one in sequence If DoSleepWake is set then the handheld will wake all configured devices when turned on and send them all to sleep again when turned off NOTE When the handheld wakes devices this achieved through the transmission of a broadcast wake i e all devices on the same channel and with the same encryption key will wake Key Operation Key Operation Sleep Send the currently selected device to sleep Wake Will attempt to wake the currently selected device Tare Toggle between Next Step to the next device F1 If motion detection is activated then the reading must be steady to enable this key Pressing this key with an unstable reading will do nothing This transmits a Data Provider packet marked with a Data Tag held in F1DataTag and can also contain data as defined by F1Data Power Toggles betwee
127. tionally on the digital output Communications To configure the device you will use the Read and Write mechanisms described in the Data Packet Structures section to read and write parameters and execute commands Parameter List Parameter Command Description ID Read the unique identifier ID for this device 3 bytes BINARY 3 bytes Version 53 Read the firmware version FLOAT R Channel 11 Radio Channel UINT8 RW EncKey 15 The radio encryption key to operate on Requires BINARY RW power cycle or Reset to enable Not supported in this 16 Bytes release Power 12 Set or read the output power level UINT8 RW range 0 to 100 default 100 Name 10 Set or read a user defined name 11 characters STRING RW 11 Bytes Model 51 Read the model number of the device STRING R 11 Bytes InputValue 60 The value that is being read by the device FLOAT R DisplayValue 61 The value being displayed by the device FLOAT R UseCSMA 18 Select whether to use Carrier Sense Multiple Access UINT8 RW techniques on transmission 0 Disabled The Carrier Sense Multiple Access will be disabled NOT RECOMMENDED 1 Enabled The Carrier Sense Multiple Access will be enabled See Unslotted CSMA CA in Appendix A BattLevel 69 The voltage measured on the battery FLOAT R OffDelay 62 Time period in minutes before switching off if no UINT16 RW button is pressed Setting to zero disables range 0 to 1440 defau
128. tions will offer RS232 RS485 and USB interfaces Refer to the Base Station section T24 BSi and T24 BSU for details on connections and interfacing 2 4GHz Radio General Communicating with T24 Devices To communicate with T24 devices a base station is required Base stations offer RS232 RS485 and USB interfaces In this section we will describe the interfaces and how data shall be sent to and retrieved from other T24 devices via the base station For details regarding device specific communications you will need to refer to the appropriate device section of the manual Packet Types There are several different packet types which are used depending on the type of data carried Read and Write packets are used to communicate with a device When it is awake and can read or write parameter values Some devices transmit data at regular intervals and this data does not need requesting Woken packets are received when a device is successfully woken Packet Structure All packets conform to the following structure The Data Packet part changes depending on what packet is being transported Length Length Base Packet Data Packet Structure CRC1 LSB CRC2 MSB Address Type 1 Byte 1 Byte 1 Byte 1 Byte Variable Bytes 1 Byte 1 Byte CRC calculated on this part Length refers to this section This Transport Packet is used to carry the Data Packets into and out of the target device via the base
129. to reset SleepDelay timer Command SleepTrigger 120 Enter Data Tag to watch for that will trigger sleep UINT16 RW mode PauseTrigger 121 Enter Data Tag to watch for that will trigger pause UINT16 RW mode ResumeTrigger 123 Enter Data Tag to watch for that will trigger resume UINT16 RW mode StayAwakeTrigger 122 Enter Data Tag to watch for that will reset SleepDelay UINT16 RW timer DoSystemZeroTrigger 125 Enter Data Tag to watch for that will reset SleepDelay UINT16 RW timer NOTE All changes require a SAVE command to enable them to survive through power cycle or RESET command Data Provider Format At every TXInterval a Data Provider packet is transmitted that holds 1 value in FLOAT format See Appendix A Data Tag Data Type Base Station SY Value1 OB OB 01 23 C6 FO 10 04 45 69 EB BE ES EC OE A3 Length Status RSSI Packet Type Checksum Measurement Resolution The noise free resolution is dependant on the Sample Time SampleTime SampleTime mS Noise Free Resolution Ratio gt 0 15 5 bits 1 50 000 gt 9 16 bits 1 65 000 gt 49 17 25 bits 1 150 000 gt 99 18 bits 1 250 000 gt 999 18 75 bits 1 400 000 Power Supply Attach power supply wiring to the module as shown below olololollolo O O OC 3V Supply N OV Supply o Connect to a 3 Volt power supp
130. ueDataTag6 exceeds this value then the lt V6 gt token and any tokens using this value will result in instead of a real value UINT16 RW Timeout7 106 Read or write the timeout in milliseconds If the time between receiving data from the device defined as input 7 Set in ValueDataTag7 exceeds this value then the V7 token and any tokens using this value will result in i instead of a real value UINT16 RW Timeout8 107 Read or write the timeout in milliseconds If the time between receiving data from the device defined as input 8 Set in ValueDataTag8 exceeds this value then the V8 token and any tokens using this value will result in instead of a real value UINT16 RW Format1 110 Read or set the format of the output value of V1 This is specified using zeros and a decimal point i e 000 0000 STRING 9 bytes RW Format2 111 Read or set the format of the output value of V2 This is specified using zeros and a decimal point i e 000 0000 STRING 9 bytes RW Format3 112 Read or set the format of the output value of V3 This is specified using zeros and a decimal point i e 000 0000 STRING 9 bytes RW Format4 113 Read or set the format of the output value of V4 This is specified using zeros and a decimal point i e 000 0000 STRING 9 bytes RW Format5 114 Read or set the format of the output value
131. uing a Reset command Requires 500mS recovery time after executing Wake 50 Wake the module from sleep Command Sleep 56 Sends the module to Sleep Command Pause 57 Stops the output streaming to allow configuration Command Resume 59 Streaming continues Command StayAwake 58 No function other than to reset SleepDelay timer Command SleepTrigger 120 Enter Data Tag to watch for that will trigger sleep UINT16 RW mode PauseTrigger 121 Enter Data Tag to watch for that will trigger pause UINT16 RW mode ResumeTrigger 123 Enter Data Tag to watch for that will trigger resume UINT16 RW mode StayAwakeTrigger 122 Enter Data Tag to watch for that will reset SleepDelay UINT16 RW timer DoSystemZeroTrigger 125 Enter Data Tag to watch for that will reset SleepDelay UINT16 RW timer NOTE All changes require a SAVE command to enable them to survive through power cycle or RESET command Data Provider Format Ten readings are contained in each Data Provider packet and these are transmitted every 5mS 200 packets per second Also in each packet there is a 16bit timestamp which indicates when the first data value was added to the packet where each unit equates to 500uS Using this timestamp it is possible to reconstruct data even with missing packets Note that the timestamp will restart from zero every 32 768 seconds The Data Provider packet is typed as Binary The 10 readings are next each formatted a
132. upplies the mcHID dll which is a great generic way of connecting to HID devices This library is free and was written to ease both the programming of PIC devices and create sample code for VB Delphi and Visual C The USB interface has also been successfully used with Windows CE but we do not supply any drivers for this operating system LED Indication Two LEDS indicate Power Mode and Activity The red LED indicates mode and should flash at a 2Hz rate If any errors are detected with the radio then the LED will remain lit The green LED flashes once for each packet received or transmitted via radio USB or serial Mantracourt Electronics Limited T24 Technical Manual Communications To configure the base station you will use the Read and Write mechanisms described in the Data Packet Structures section to read and write parameters and execute commands The base station may also be receiving packets from other devices These will be Data Provider Packets and these may arrive at any time Parameter List Parameter Command Description Native Data Read Number Type Write ID 3 Read the unique identifier ID for this device 3 bytes BINARY 3 R byte Channel 11 The radio channel to operate on 1 16 Requires UINT8 RW power cycle or Reset to enable EncKey 15 The radio encryption key to operate on Requires BINARY 16 RW power cycle or Reset to enable 16 bytes Not bytes supported in this release UseCSMA 18 Select whe
133. user defined duration in seconds To use the default just omit this byte If this byte is present its ASCII value will be used to determine how long it will be in pairing mode NOTE While in pairing mode the base station will not operate as normal If the remote device enters its own pair mode non master then the communications negotiations will take place and the device may come out of any low power modes and a response will be sent to the base station Mantracourt Electronics Limited T24 Technical Manual 12 Pair Response This packet will arrive at the base station if another device enters pair mode while the base station is waiting to pair Once this packet has arrived the base station will be free to talk to the device It can also determine the device ID and Default Data Tag if it needs this information Packet From ID Data Tag RSSI CV Type 14 00 00 00 00 oo 00 00 Packet Type This is 0x14 hex 20 decimal and may have higher bits set which indicate Error Low Battery and Broadcast From ID This contains the ID of the device that paired Data Tag This contains the default Data Tag of the paired device RSSI This indicates the signal strength that this packet was received at See RSSI amp CV in Appendix A Cv This indicates correlation value which equates to the quality of the signal when this packet was received See RSSI amp CV in Appendix A NOTE After configuratio
134. ut will reflect whether the device is in gross or zeroed net mode We will use the out of the box rate of 3 per second The display only needs the ASCII data followed by a carriage return Assuming the T24 SAs send data on Data Tag C675 and FF34 Parameter settings Linel lt NET gt lt 0D gt FormatSUM 00 000 ValueDataTagl C675 ValueDataTag2 FF34 PrintTrigger C675 MinInterval 100 LineDelay 0 PrintOnError 1 SwitchMode 1 Print Gross Sum of 2 Devices To Printer We need to print the gross sum of 2 devices to a printer with each time the switch input is activated on the T24 SO We need to display the value of each input as well as the gross sum The printer is not very fast so we can only send a line every 50mS Also we do not want to print more often than once every 30 seconds even if the switch is pressed We want the printed output to look like Mantracourt Electronics Ltd Weigh Station 1 Input 1 xx xxxx Kg Input 2 xx xxxx Kg For assistance call 0871 345672 Parameter settings Linel Mantracourt Electronics Ltd lt 0D gt lt 0A gt Line2 Weigh Station 1 lt 0D gt lt 0A gt Line3 lt 0D gt lt 0A gt Line4 Input 1 V1 Kg lt 0D gt lt 0A gt Line5 Input 2 V2 Kg lt 0D gt lt 0A gt iS gt 22235522930 lt 0D gt lt 0A gt Line7 Sum lt GRO gt Kg lt 0D gt lt 0A gt Mantracourt Electronics Limited T24 Technical Manual 68 Line8 lt 0D gt lt 0A gt Line9 For assistance call lt 0D gt lt 0
135. y life will be 24 0 416 times the continuously on life i e DA y ai S7 So SUSO X DS ceys 15350156 CES Or 44 3 months Ois Over 3 and a half years Note that the above rough guide does not take into account the battery usage as the device periodically wakes from deep sleep to check whether it should wake up properly If the device wake check interval is set to 5 seconds then we can modify the battery life from above by multiplying by a factor of 0 6 We have only calculated the factor for a 5 second wake check interval 3 6 years X 0 6 2 1 years 35 Mantracourt Electronics Limited T24 Technical Manual Accurate Guide The following shows how to more accurately calculate battery life This does rely on an estimate of usable battery capacity which is not as high as manufacturers state their battery capacity to be except for batteries where the cuttoff voltage above the minimum voltage for the device To estimate usable capacity you will need to refer to manufacturers discharge graphs and find a curve closest to around 30mA and estimate the capacity as Amps X Time where time is the point where the battery falls below where the device would be supplied with 2 1V This will be 1 05 in the case of 1 5V cells as we use two in series TXInterval TXInterval Parameter 1000 SampleTime SampleTime Parameter 1000 HoursUsage How many hours the device is NOT asleep in a 24 hour period BattAH Usable battery capacity in Amp Hours
136. ype Formats in Appendix A The Display As bits should be used where possible as this can help in presenting the data for display purposes 7 Mantracourt Electronics Limited T24 Technical Manual Data This will be of variable length and will depend on the data type RSSI This indicates the signal strength that this packet was received at See RSSI amp CV in Appendix A CV This indicates correlation value which equates to the quality of the signal when this packet was received See RSSI amp CV in Appendix A See Advanced Data Provider Interface in Read The read packets are used to read parameters from a remote device or the base station itself To talk to the base station just use the base station ID Packet Type To ID Command 05 00 00 00 00 Packet Type This is 0x5 hex 5 decimal To ID This is the ID of the device to read from MSB first Command The command number of the parameter you want to read You will need to refer to the device manual for this information Write The write packet is used to write parameter values to a device or execute commands You can write any supported data format to any other data format parameter but some formats are not very suitable i e You can write an INT32 formatted value to a parameter that is just a UINT8 but if the value exceeds either the target data type limits or any other bounded limits imposed by the device you will receive an IN

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