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SPT-61

1. User manual for TEMPERATURE TRANSMITTER SPT 61 6 3 EXAMPLES OF QUERY ANSWER FRAMES Examples apply for device with address 1 All values are represent hexadecimal Field description ADDR Device address on modbus network FUNC Function code REG H L Starting address address of first register to read write Hi and Lo byte COUNT H L No of registers to read write Hi and Lo byte BYTE C Data byte count in answer frame DATA H L Data byte Hi and Lo byte CRC L H CRC error check Hi and Lo byte 1 Read of the displayed value measurement SPT 61 device address 01h ADDR FUNC REG HL COUNT H L CRC LH 01 03 00 01 00 01 D5 CA a The answer we assume that the measure result is not out of range ADDR FUNC BYTE C DATA H L CRC LH 01 03 02 00 FF F8 04 DATA H L displayed value 255 no decimal point Decimal point position can be read from reg 03h b The answer if an error occur ADDR FUNC ERROR CRC LH 01 83 60 41 18 ERROR error code 60h bottom border of the measurement range is exceeded 2 Read of device ID code ADDR FUNC REG H L COUNT H L CRC LH 01 03 00 21 00 01 D4 00 13 User manual for TEMPERATURE TRANSMITTER SPT 61 The answer ADDR FUNC BYTEC DATA HL
2. 24 36V DC not separated max 3 7 mA while configuration supplied from serial interface Pt 100 Pt 500 Pt 1000 type 2 or 3 wires automatic connection recognition 100 C 600 C 0 2 25 C 0 01 C 0 1 C max 20 Q range max 3 4 24 mA load resistance 0 Us 9 5V 24mA kO 12 bits USB Virtual Communication Port or RS 232 TTL 8N1 and 8N2 Modbus RTU not separated 9600 bit s non volatile memory EEPROM type User manual for TEMPERATURE TRANSMITTER SPT 61 Protection level IP 20 Housing type DIN rail mounted 35 mm rail Housing dimensions 80 x 97 x 7 mm Operating temperature 0 C to 50 C depending on version or 20 C to 50 C Storage temperature 10 C to 70 C depending on version or 20 C to 70 C Humidity 5 to 90 no condensation Altitude up to 2000 meters above sea level Screws tightening max torque 0 5 Nm Max connection leads diameter 2 5 mm EMC according to PN EN 61326 1 4 This is a class A unit In a residential or a similar area it can cause radio frequency interference In such cases the user can be requested to use appropriate preventive measures 4 DEVICE INSTALLATION The unit has been designed and manufactured in a way assuring a high level of user safety and resistance to interference occurring in a typical industrial environment In order to take full advantage of these characteristics installation of the unit must be conducted correctly
3. CRC LH 01 03 02 20 61 60 6C DATA identification code 2061h 3 Change of the device address from 1 to 2 write to reg 20h ADDR FUNC REG HL DATA H L CRC LH 01 06 00 20 00 02 09 C1 DATAH 0 DATA L new device address 2 The answer the same as the message ADDR FUNC REG H L DATA H L CRC LH 01 06 00 20 00 02 09 C1 4 Read of the registers 1 2 and 3 in one message example of reading a number of registries in one frame ADDR FUNC REG HL COUNT HL CRC LH 01 03 00 01 00 03 54 OB COUNT L the count of being read registers max 16 The answer ADDR FUNC BYTEC DATA H1 L1 DATA H2 L2 DATA H3 L3 CRC LH 01 03 06 00 OA 00 00 00 01 78 B4 DATA H1 L1 reg 01h 10 displayed value 1 0 DATA H2 L2 reg 02h 0 no errors DATA H3 L3 reg 03h 1 decimal point position 0 0 14 There is no full implementation of the Modbus Protocol in the device The functions presented above are available only User manual for TEMPERATURE TRANSMITTER SPT 61 15 fj simex SIMEX Sp z 0 0 ul Wielopole 7 80 556 Gda sk Poland tel 48 58 762 07 77 fax 48 58 762 07 70 http www simex pl e mail infoQsimex pl
4. and according to the local regulations A Read the basic safety requirements on page 2 prior to starting the installation Ensure that the power supply network voltage corresponds to the nominal voltage stated on the unit s identification label The load must correspond to the requirements listed in the technical data All installation works must be conducted with a disconnected power supply 4 1 UNPACKING After removing the unit from the protective packaging check for transportation damage Any transportation damage must be immediately reported to the carrier Also write down the unit serial number on the housing and report the damage to the manufacturer Attached with the unit please find user s manual warranty User manual for TEMPERATURE TRANSMITTER SPT 61 4 2 ASSEMBLY AN Disconnect the power supply prior to starting assembly Check the connections are wired correctly prior to switching the unit on 4 3 CONNECTION METHOD Caution AN Installation should be conducted by qualified personnel During installation all available safety requirements should be considered The fitter is responsible for executing the installation according to this manual local safety and EMC regulations Wiring must meet appropriate standards and local regulations and laws In order to secure against accidental short circuit the connection cables must be terminated with appropriate insul
5. meet the appropriate standards and regulations concerning safety and be equipped with adequate overvoltage and interference filters User manual for TEMPERATURE TRANSMITTER SPT 61 AY Do not attempt to disassemble repair or modify the unit yourself The unit has no user serviceable parts Defective units must be disconnected and submitted for repairs at an authorized service centre The unit is designed for operation in an industrial environment and must not be used in a household environment or similar 2 GENERAL CHARACTERISTICS The SPT 61 module is equipped with Pt 100 Pt 500 Pt 1000 type input with automatic connection recognition three or two wire sensor The measurement range spans from 100 C to 600 C and input is fully linearised according to PN EN60751 A2 1999 standard Measurement value is transmitted to the current loop output 4 20mA directly after recalculation according to scale selected by user The device configuration may be done via build in serial interface USB or RS 232 TTL with Modbus RTU protocol Every unit can be factory pre configured on request 3 TECHNICAL DATA Power supply voltage Us Current consumption Measurement input Measurement range Measurement accuracy Temperature coefficient Internal resolution Measurement wires resistance Passive current output Resolution of output converter Communication interface depending on version Baud rate Data memory 9 5
6. point The status of the current measurement Oh data valid AOh top 02h No Oh AOh 60h border of the measurement range is exceeded 60h bottom border of the measurement range is exceeded 03h No 1 Decimal point position constant value 1 0 0 04h Yes ade de t EL r LED binary format State of current output expressed in 1 256 mA units it means that 05h Yes 0h 1800h high byte express integer part and low byte fractional part of desired output current 06h No 999 6000 Peak drop value no decimal point Input registers group op Ya Ge EN 12h Yes 0 5 InputFilter parameter measurement filtering rate 13h No 1 Decimal point position constant value 1 0 0 18h Yes 99 99 Meg parameter shift of measurement scale expressed Modbus registers group 20h No 1 Device address of the device accordingly to Modbus protocol 21h No 2061h Device identification code ID Hold registers group 11 User manual for TEMPERATURE TRANSMITTER SPT 61 Register Write Range Register description HoldMode parameter type of detected changes 0 peaks peak and next drop of the input signal of value equal at 50h Yes 0 1 least PEA 1 drops drop and next peak of the input signal of value equal at least PEA 51h Yes 0 9999 HoldPEA parameter no decimal point included minimal detected signal change classified as peak o
7. range due to formula Lux 20 mA 20 mA x OutHiRange 96 This parameter can be set from O to 19 9 User manual for TEMPERATURE TRANSMITTER SPT 61 OutAlarm parameter determines the behaviour of current output if any critical situation occurs exceeding of permissible measurement range shortcut or break of measurement circuit In this case output current will not change or will be set to the user selected value depending on OutAlarm parameter e Occurrence of critical situation is signalised by flashing red LED ALARM on front panel When the critical situation goes the current will be set to value calculated due to formulas given above Device parameters are stored in nonvolatile EEPROM memory All available device parameters can be set via serial interface see LIST OF REGISTERS at page 11 5 1 DETECTION OF THE PEAK VALUES The SPT 61 module is equipped with peaks detection function It can detect a peaks of the input signal and hold their values Presets connected with this function are placed in group of registers named Hold see LIST OF REGISTERS The detection of the peak can be done if the measured signal raises and drops of value at least equal to parameter HoldPEA Detected peaks are hold during the time defined by parameter HoldTime If a new peak will be detected while one is hold this new peak will be held and value holding time counter will restarted Figure 5 1 If no peaks are det
8. Assisting the automation rz simex industry since 1986 User manual TEMPERATURE TRANSMITTER SPT 61 Firmware v 1 07 or higher Inputtype Pt100 500 1000 Pt100 500 1000 4 20 mA signals transmitter a A V re lanie p t Josh a CO Nr 83257845 Mo CE Read the user s manual carefully before starting to use the unit or software Producer reserves the right to implement changes without prior notice 2012 11 16 SPT 61_INSSXEN_v 1 05 000 User manual for TEMPERATURE TRANSMITTER SPT 61 CONTENTS 1 BASIC REQUIREMENTS AND USER SAFETY secure anta tnnt tn enata tna tha tna sata PAPAE AAA 2 2 GENERAL CHARACTERISTIGCS esee eese etae ana az enata tnnt AAAA PORA APA ana ana aaa Aaaa da 3 3 TECHNICAL DATA X ETS 3 4 DEVICEINSTALLATION 4 ERE GERNE NE E M 4 4 2 ASSEMBLY maa nd 43 CONNECTION METHOD 1n daret deri equas noe A Ora ay enn 4 4 MAINTENANQCE se DE aa DENE eneeier 5 PRINCIPLE OF OPERATION muersavrvvrsvrnvrnvrnnvsvessvnnernernvnnvnnvesnennersvnnvnnvnnnrnvensensennernvrnvnnvensensessnvnssvvnsnvensnnensn 5 1 DETECTION OF THE PEAK VALUES 6 THE MODBUS PROTOCOL HANDLING i Oo EIST OF REGISTER Summen EEE AES A E 6 2 TRANSMISSION ERRORS DESCRIPTION sss 6 3 EXAMPLES OF QUERY ANSWER FRAMES rruvrvvrrvvrvrnvennverververververvensrerrarverververve
9. ated cable tips Tighten the clamping screws The recommended tightening torque is 0 5 Nm Loose screws can cause fire or defective operation Over tightening can lead to damaging the connections inside the units and breaking the thread In the case of the unit being fitted with separable clamps they should be inserted into appropriate connectors in the unit even if they are not used for any connections Unused terminals marked as n c must not be used for connecting any connecting cables e g as bridges because this can cause damage to the equipment or electric shock Due to possible significant interference in industrial installations appropriate measures assuring correct operation of the unit must be applied To avoid the unit of improper indications keep recommendations listed below Avoid running signal cables and transmission cables together with power supply cables and cables controlling inductive loads e g contactors Such cables should cross at a right angle Contactor coils and inductive loads should be equipped with interference protection systems e g RC type Use of screened signal cables is recommended Signal cable screens should be connected to the earthing only at one of the ends of the screened cable In the case of magnetically induced interference the use of twisted pair of signal cables is recommended Twisted pair best if shielded must be used with RS 485 serial transmission conne
10. controlled depend on present measured value 01h register or peak value 06h register if peak detection is enabled OutMode parameter determines operation mode of the output Current output can be controlled by present temperature value 4 20 mode or fixed to value written by user to the 05h register using serial interface modbus mode In 4 20 mode OutLow parameter determines the temperature value for which the output current equals 4 mA and OutHigh parameter determines the temperature value for which the output current equals 20mA The output current value is calculated due to formulas given below T OUIL Iu X 16m4 4 mA out OUtH OUtL m nm where T denotes the temperature value Gi OutLow parameter can be greater than OutHigh In this case the conversion characteristic is reversed it means that if input value raises the output current falls OutLoRange and OutHiRange parameters define the output current range maximum range 3 6 to 24 mA If calculated output value I exceeds defined range then current output generates the current equal to upper or lower border of the defined range The parameters define the percentage extension of nominal current range 4 20 mA with 0 1 resolution Parameter OutLoRange defines lower border of the range due to formula Inn 4 MA 4 MA x OutLoRange 96 This parameter can be set from 0 to 9 9 Parameter OutHiRange defines lower border of the
11. ctions User manual for TEMPERATURE TRANSMITTER SPT 61 In the case of interference from the power supply side the use of appropriate interference filters is recommended Bear in mind that the connection between the filter and the unit should be as short as possible and the metal housing of the filter must be connected to the earth with the largest possible surface The cables connected to the filter output must not be run with cables with interference e g circuits controlling relays or contactors Connections of power supply voltage and measurement signals are executed using the screw connections on the back of the unit s housing Figure 4 1 Method of cable insulation replacing and cable terminals AY All connections must be made while power supply is disconnected Passive current output 4 20mA polarization doesn t matter Pt100 500 1000 Pt100 500 1000 Figure 4 2 Terminals description User manual for TEMPERATURE TRANSMITTER SPT 61 Temperature sensor can be connected to the device in typical 3 wire circuit Figure 4 3a or 2 wire circuit Figure 4 3 b Due to precision of measurement 3 wire circuit is recommended If 2 wire circuit is used the resistance of wires should be as small as possible to a avoid of measurement errors Measured value can be corrected constant correction using InputOffset parameter available in group of registers called Input Due to low precis
12. ected while time HoldTime elapses device returns the current value of input signal in the peak value register 06h register The current output can be controlled depending on the current value of input signal 01h register or the peak value 06h register see LIST OF REGISTERS a measure HoldTime HoldTime HoldPEA real measurement result time display value Figure 5 1 Process of peaks detection 10 User manual for TEMPERATURE TRANSMITTER SPT 61 6 THE MODBUS PROTOCOL HANDLING Transmission parameters 1 start bit 8 data bits 1 or 2 stop bit 2 bits are send 1 and 2 bits are accepted when receive no parity control 9600 bits second Baud rate Transmission protocol MODBUS RTU compatible The device parameters and display value are available via RS 485 interface as HOLDING type registers numeric values are given in U2 code of Modbus RTU protocol The registers or groups of the registers can be read by 03h function and wrote by 06h single registers or 10h group of the registers accordingly to Modbus RTU specification Maximum group size for 03h and 10h functions can not exceeds 16 registers for single frame a The device interprets the broadcast messages but then do not sends the answers 6 1 LIST OF REGISTERS Register Write Range Register description 01h No 999 6000 Measurement value no decimal
13. g use warm water with small amount of detergent or in the case of more significant contamination ethyl or isopropyl alcohol AM Using any other agents can cause permanent damage to the housing M Product marked with this symbol should not be placed in municipal waste Please R check local regulations for disposal of electronic products User manual for TEMPERATURE TRANSMITTER SPT 61 5 PRINCIPLE OF OPERATION SPT 61 module allows conversion from temperature PT100 to the current value in 4 20mA standard Present value of temperature is available as measurement register of device reg addr 01h If input signal exceeds the permissible range shortcut or break of measurement circuit occur appropriate bit of status register register 02h will be set This bit signalise exceeding of permissible measurement range Configuration registers are available via serial interface Parameters referred to measurement input can be found in group of registers called input see LIST OF REGISTERS and allows selection of input type InputType parameter change of filtration rate of values returned in measurement register InputFilter parameter offsetting of the measurement scale InputOffset parameter The way of conversion from temperature measurement result to the current value is described by parameters which can be found in group of registers named Output see LIST OF REGISTERS Current output can be
14. ion 2 wire connection is not recommended When 2 wires connection is used the resistance of particular wires Ra Rb CAN BE DIFFERENT When 3 wires connection is used the resistance of particular wires Ra Rc MUST BE IDENTICAL to enable proper compensation of it s resistance The resistance of particular wire should not be greater than 20 Q a b EJ a T n c Pt100 500 1000 Pt100 500 1000 Ra Rb Rc Ra Rb doesn t matter Figure 4 3 Connection of sensors a 3 wires circuit b 2 wires circuit The connection circuit should not be changed while unit is powered Every change of connection while the unit is powered causes measurement errors by several seconds after change User manual for TEMPERATURE TRANSMITTER SPT 61 Meter or controler current input 4 20mA 9 5V 36V DC n c Pt100 500 1000 Pt100 500 1000 3 wires circuit 2 wires circuit Figure 4 4 Example of current outputs connection 4 4 MAINTENANCE The unit does not have any internal replaceable or adjustable components available to the user Pay attention to the ambient temperature in the room where the unit is operating Excessively high temperatures cause faster ageing of the internal components and shorten the fault free time of the unit s operation In cases where the unit gets dirty do not clean with solvents For cleanin
15. nversenvrereervevsnven E O 169 l ln ln a BRRR WINNA Explanation of symbols used in the manual This symbol denotes especially important guidelines concerning the installation and operation of the device Not complying with the guidelines denoted by this symbol may cause an accident damage or equipment destruction IF THE DEVICE IS NOT USED ACCORDING TO THE MANUAL THE USER IS RESPONSIBLE FOR POSSIBLE DAMAGES This symbol denotes especially important characteristics of the unit Read any information regarding this symbol carefully 1 BASIC REQUIREMENTS AND USER SAFETY AY The manufacturer is not responsible for any damages caused by inappropriate installation not maintaining the proper environmental conditions and using the unit contrary to its assignment Installation should be conducted by qualified personnel During installation all available safety requirements should be considered The fitter is responsible for executing the installation according to this manual local safety and EMC regulations The unit must be properly set up according to the application Incorrect configuration can cause defective operation which can lead to unit damage or an accident If in the case of a unit malfunction there is a risk of a serious threat to the safety of people or property additional independent systems and solutions to prevent such a threat must be used Neighbouring and connected equipment must
16. r drop see Figure 5 1 52h Yes 1 199 HoldTime parameter maximum peaks or drops display time expressed in 0 1 second HoldOut parameter current output operation mode 58h Yes 0 1 0 driven by present measured value from 01h register 1 driven by peak drop value from 06h register Output registers group OutMode parameter current output mode Es 0 current output value in 4 20mA mode depends on measured AC es 0 1 value by 01h or 06h register 1 current output controlled via serial interface by 05h register A1h Yes 999 9999 OutLow parameter no decimal point included A2h Yes 999 9999 OutHigh parameter no decimal point included A3h Yes 0 99 OutLoRange parameter expressed in 0 196 A4h Yes 0 199 OutHiRange parameter expressed in 0 196 OutAlarm parameter current output value on critical exception Pen Yen 0 2 0 no change 1 22 1 mA 2 3 4 mA 6 2 TRANSMISSION ERRORS DESCRIPTION If an error occurs while write or read of single register then the device sends an error code according to Modbus RTU specifications example message no 1 Error codes 01h illegal function only functions 03h 06h and 10h are available 02h illegal register address 03h illegal data value AOh exceed of upper border of input range 60h exceed of lower border of input range AOh and 60h codes can appear only during reg O1h is reading by 03h function read of a single register 12

SPT-61

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