PART 1 - Aplisens SA
Contents
1. Ox0004 Pressure of sensor 2 754 00 00 00 00 7 Temperature of sensor 1 41 C8 00 00 CPU temperature 41 C8 00 00 0 000 Temperature of sensor 2 754 00 00 00 00 17 User specific 01 5E 2 bytes 1 register 1 register 18 0x0011 Pressure of sensor 1 Signed 16 bit int 01 5E 2 bytes 0x0012 Pressure of sensor 2 Signed 16 bit int 00 00 2 bytes 1 register 20 0x0013 Temperature of sensor 1 Signed 16 bit int 09 C4 2 bytes 21 0 0014 temperature Signed 16 bit int 109 C4 2 bytes Ox0015 Temperature of sensor 2 Signed 16 bit int 00 00 2 bytes 1 register 00 0C 2 bytes 1 register See DTR PCE PRE SGE M 1 register 1 register Unsigned 16 bit 23 0 0016 Pressure unit MODBUS ENG Part 1 table in section 2 5 1 2 bytes 1 register int 10 0017 Upper sensor limit 42 C8 00 01 4 bytes 2 registers x001A Lower sensor limit IEEE754 00 00 00 00 4 bytes 2 registers 2 0 001 namping value IEEE754 00 00 00 00 4 bytes 2 registers seconds s 31 0x001E Response delay value Unsigned 16 bit 00 06 2 bytes 1 register milliseconds ms int 0x001F Modbus address Unsigned 8 bit int 00 01 2 bytes 1 register 0x0020 Identity register Unsigned 8 bit int 00 BC 7D 00 00 01 6 bytes 3 registers 0x0023 Status register 8 bit flags 00 00 2 bytes 1 register Fields shaded in gray are not active in t2. flags 2 bytes 1 register Fields shaded in gray are not active in the specified models table in section 2 4 1 8 9 1 1 2 5 DTR PCE PRE SGE MODBUS ENG 2 4 1 Codes of pressure units am mer 08 m 7 29 mmo 3 4 wm 9 mBowec Vi ommo 30 Ma 3 This error shows that a function code 15 not supported by the device Function code No 3 i e Read Holding Registers 1s currently implemented Invalid data address This error shows that an address is out of the range 0x00 0x23 Invalid data load Invalid number of registers to be read as specified in the frame 4 Transmitter failure Transmitter hardware error Memoyemr RAM or FLASH memory ero 3 Connection via PM12 connector or cables PC R E 28 SGE 25 S Smart Output Function PM12 connector male iy pe current loop in configuration Digital Sum 2 Notes 6 DTR PCE PRE SGE MODBUS ENG 3 1 2 NS 3 M12 connector Pumaren connector male The transmitters PC R E 28 Modbus and SGE 25 S Smart Modbus from Aplisens have two operating modes configuration mode and Modbus mode The configuration mode 15 used for changing settings and detailed diagnostics of the transmitter In this mode you can also activate a current loop compatible with a 4 20 mA current output in transmitters manufactured after Jul 2014 and provided with a
3. Uds 19 42 9 2 21221010 oio itte dedos ite edite uten diesen ouod 19 4 2 9 Register 17 User value Ma atu eia tuti oem ut US esaet 19 4 2 10 Register 18 Pressure of sensor 1 binary format integer and 8120 20 4 2 11 Resister 19 Pressure Ob SENSON 2 user ep 20 4 2 12 Register 20 Temperature of sensor 1 binary format integer and sign 20 4 2 13 X Register 21 CPU temperature binary format integer and 8120 20 42 14 12 23 EM nt Demi add 20 4 2 15 Register 24 Sram Dy 20 2 2 DTR PCE PRE SGE MODBUS ENG 4 2 16 Register 25 Upper sensor UTILE sedeo t ep eerta SM esed nu ten CR RN Rates emet Ur onda Res 21 4 24 REB L Lower sensor cedet tm UE d DH UE 21 4 218 Register 29 Dampin value soonest eise vtae 21 42 19 REPIS 12 00 0482 22222 21 4 2 20 Resister 32 Modbus quia abes daten a ee ea 21 42 21 Register 55 Identily IS ICE oae rie A E O AE 21 42 22 26 09 1 S T6 PISLOT TUN EE EOM Eee UPON 21 5 Conficuration mode ertet indus 22 5 1 Modbus Configurator serial port configuration Modbus network search searching performed by an individual 22 5 2 Transmitter id
4. Default settings Baud Rate 19200 Stop Bits Serial port settings example Next search for Modbus transmitters according to address by clicking on Scan Modbus network see figure below nfigurator 2 1 0 195 Scan Modbus network Settings Help Recently found devices Address 1 Device ID 19200 4 Device ID 00002 19200 1 Device ID 00003 13200 E 71 Find transducer only one Scan Modbus network Device ID 00005 13200 E 2 3 Address 4 Device ID 00004 19200 1 H b Device ID 19200 4 2 23 DTR PCE PRE SGE MODBUS ENG When searching the network a list of Modbus transmitters from Aplisens connected to the network will be displayed If you know the network address of the transmitter to be set up click on the appropriate transmitter in the scanned list A list of registers will appear with read out parameters from Modbus registers Modbus Configurator 2 1 0 195 Modbus mode Modbus Mode Configuration Mode Regista Addes Value name 1 0 0000 User specific O02 Pressure of sensor 1 Pressure of sentar 2 Temperature of sengo 1 E Processor temperalbure 11 i Electronic bemperabure Temperature of sensor 2 User 1 1002 Signed 16 bit mt Percent of range Pressure of sensor 1 1 7100 k Signed mt Pressure measured Pressure of sensor 2 17100 k Signed 16 64 int Temperatur
5. 9 plus A F Default setting 00000000 When write protect is enabled the transmitter s settings cannot be changed 3 9 Set pressure zero restart transmitter User can perform additional operations on the transmitter Set PV Zero enables resetting pressure in a non pressurized transmitter The resetting option is used for eliminating any deviations of the zero point caused by installation position or stress The operation cannot be performed if deviation of the zero point exceeds the permissible limit or if the transmitter measures absolute pressure Restart Device enables sending a command to hot restart the transmitter without the need to disconnect the power supply Set PY ero Restart Device 5 10 Calibrations User can perform 2 point pressure calibration and 2 point current calibration 5 10 1 Pressure or level calibration To open the pressure or level calibration tab select Device Calibration on the top bar of the programme screen Calibration of the lower and upper pressure limits should be best performed for the transmitter s standard measuring range For metrological reasons if the used range 15 only an insignificant section of the standard range the transmitter should be calibrated based on the lower and upper limits of the used range The calibration procedure involves supplying reference pressure to the transmitter for the lower calibration point The reference pressure or level should be entered into the set va
6. 0 Therefore only one transmitter may be connected when scanning through a communication bus Where there are a larger number of transmitters operating 1n the Modbus mode connected to the bus and set to the same transmission parameters sending a broadcast address will make transmitters respond to a request message at the same time causing data corruption and an unreadable answer Search device only one on the bus Recently found devices Address 1 Device ID 00001 192007621 Scan bauds Parity 9 Click on detected transmitter A list of registers will appear with parameters read out from Modbus registers 2 Modbus Configurator 2 1 0 195 File Device Settings Help Modbus Mode Configuration Mode Register Address 1 RENE 00004 00006 00008 Ox000C Ox000E 0010 00011 00012 00013 050014 00015 00016 00017 00019 00015 Ox001C Ox001E 0001F 040020 00023 Continuous read Value name User specific Pressure af senzar 1 Pressure of sensor 2 Temperature of sensor 1 Processor temperature Temperature of sensor 2 User specific Pressure of sensor 1 Pressure of sensor 2 Temperature of sensor 1 Processor temperature Temperature of sensor 2 Unit Upper sensor limit Lower sensor limit Damping value Response delay value Modbus address Identity register Status register Pop up view 25 Modbus mode 0 0 0 2350 2119 kPa 100 00 0
7. 2 bytes CRC Low CRC Hi Modbus RTU message field descriptions Slave Address network address of a slave device The address 0 is reserved for broadcast mode when a request is sent from the master device All slave devices whatever their addresses must be capable of responding to a message sent to the address 0 by the master The individual slave devices are assigned addresses in the range of 1 247 In one network cannot be more than one device with the same address in this range Addresses in the range of 248 255 are reserved for future use 110 247 248 10 255 Broadcast Slave individual addresses Reserved address Function code A code to tell the slave to which a request 15 addressed what functions are to be performed Function codes use 7 bits 0 127 The oldest 8 bit is always zero when a message 15 sent by the master The same function code is returned in this field in the slave response message If the oldest 8 bit is zero it means that the function was performed correctly and the data returned in the message are also correct If the oldest 87 bit is one it means that a function error or a device error was detected Data The Function Code can be followed by the field Data containing control data master request or read data slave response depending on the function number This field can contain up to 252 bytes of data If the oldest 8 bit of the function code in the slave response
8. Ov ING IEEE754 4 bytes 2 registers asic range An upper value of the transmitter s basic range expressed in the transmitter s pressure units This value is sent in 4 byte floating point format conforming to IEEE754 25 4 2 17 Register 27 Lower sensor limit 27 Ox001A OO Museu 4 bytes 2 registers basic range A lower value of the transmitter s basic range expressed in the transmitter s pressure units This value is sent in 4 byte floating point format conforming to IEEE754 4 2 18 Register 29 Damping value Damping value 29 0x001C The seconds s 3 IEEE754 4 bytes 2 registers A damping block time constant in the transmitter in seconds The damping time constant can be defined in the range of 0 to 30 seconds This value is sent in 4 byte floating point format conforming to IEEE754 4 2 19 Register 31 Response delay 31 0x001E Response delay value Unsigned 16 bit 2 bytes 1 register milliseconds ms int It is a value of response delay subsequent to the Master request It describes the time between the end of a bit stop byte of the message checksum and a bit start byte of the response message address This time depends on the speed of transmission and always exceeds 3 5T This time may be useful in designing the time of a measurement cycle in a Modbus network 4 2 20 Register 32 Modbus address 32 Ox001F Modbus address 1 247 Unsigned 8 bit int 2 bytes 1 register Values of the transmitter s n
9. detail in configuration mode with the use of programmes such as e g Raport 2 from APLISENS 2 5 27 DTR PCE PRE SGE MODBUS ENG Configuration mode 5 1 Modbus Configurator serial port configuration Modbus network search searching performed by an individual transmitter To identify read and modify settings or to perform calibration of the transmitters described in this document switch the transmitter into Configuration Mode using Modbus Configurator To do so use the button on the form of the program The procedure to be followed if it is required to reconfigure parameters of one of the transmitters operating in a Modbus network It 15 not necessary to disconnect the Aplisens transmitters from the Modbus network to change their settings or to perform calibration If all transmitters connected to network are in Modbus mode stop the master process controller and connect an additional PC controller provided with Modbus Configurator to the network After launching the Configurator open the tab Serial port settings 2 4 and set the number of COM port to which the RS485 converter is connected Modbus baud rate parity mode and stop bits for the transmitters in the network M Modbus Configurator 2 1 0 195 File Device Settings Help m mud Ss Yl A amp 1 j m Settings Serial pork Part COMS wt Modbus communication parameters
10. eliminates the need to use external polarization resistors Power losses in RS485 transceivers caused by e g bus short circuit are limited by the use of thermal safety features in transmitting and receiving circuits 2 3 3 1 16 of bus load Input impedance in RS485 transceivers used in the transmitters from Aplisens in receiving mode is higher than the standard impedance to enable connecting up to 256 devices to the bus 2 10 DTR PCE PRE SGE MODBUS ENG 2 3 4 Line transmission The terminating resistors on the RS485 bus should be connected between the points A and B at the beginning and at the end of the communication bus When working with long transmission lines at the highest transfer rates resistor value should correspond to cable impedance which typically is 120 Q With shorter bus segments and lower transfer rates resister with higher values e g can be used to reduce current fluctuations in the transmission line with 2 resistors of 120 O the amplitude can be as high as ca 50 mA At least one resistor should be used to ensure stable communication If a fail safe device 15 connected to the master bus the electromagnetic environment in which communication bus is located is free of interferences and the transmission line is relatively short several meters and terminations resistors are not required The APLISENS transmitters described in this document are NOT provided with terminations resistors 2 33 Line polariz
11. is one the data read are not entered in the field Data in the response message but one byte of the field 1s used for sending an error code see DTR PCE PRE SGE MODBUS ENG Part 1 section 2 6 Error codes supported by Modbus CRC At the end of a message there is always a field for the 2 byte control sum CRC16 sent according to the sequence CRC Low CRC High The control sum 15 calculated as defined in supplement B to MODBUS over Serial Line Specification and Implementation Guide v1 02 available at http www modbus org 2 to 14 DTR PCE PRE SGE MODBUS ENG 3 3 Modbus RTU message transfer rules 3 3 1 Primary rules An address in the range 1 247 can only be assigned to one slave device connected to the bus If more devices connected to the bus are assigned the same address all of them will send conflicting response messages at the same time Data transfer operations via messages are initiated at all times by the master This means that slave devices can only send data containing messages after receiving a properly addressed request message from the master A message is made up of a number of bytes These bytes should be sent without any between intervals which mean that the entire message must be transmitted as a continuous stream The maximum permissible silent interval between two successive characters must not exceed 1 5 where T 15 the time it takes to transmit one character 11 bits If the s
12. milliseconds ms Modbus address Identity register Status register Bytes 2 bytes per register of the controlled set range IEEE754 4 bytes 2 registers ever 4 bytes 2 registers process variable Constant 0 IEEE754 4 bytes 2 registers sensor 1 temperature process variable at 4 bytes 2 registers C CPU temperature process variable at 754 4 bytes 2 registers C Constant 0 C IEEE754 4 bytes 2 registers i 4 bytes 2 registers 4 bytes 2 registers 1 100 of the controlled set range Signed 16 bit int 2 bytes mme 1 register Integer 1 100 of the pressure or level unit Signed 16 bit int 2 bytes 1 register Value 0 1 100 of the selected unit Signed 16 bit int 2 bytes 1 register ae Signed 16 bit int 2 bytes Value 0 TA 1 100 at C Signed 16 bit int 2 bytes 1 register 2 bytes 1 register See Pressure or level Unsigned 16 bit DTR PCE PRE SGE Signed 16 bit int 2 bytes 1 register 1 register unit int MODBUSY ENG Part 1 table in section 2 5 1 2 bytes 1 register Upper limit of the standard range IEEE754 4 bytes 2 registers Lower limit of the standard range IEEE754 4 bytes 2 registers net 16 bit 2 bytes 1 247 Unsigned 8 bit int 2 bytes 1 register Le Unsigned 8 bit int 6 bytes 3 registers 8 bit flags 2 bytes 1 register 1 register i Fields sha
13. range The following functions are available from a drop down list linear root quadratic user The control value of a process output transformed with a transfer function is available in Modbus 1 and 17 registers 5 6 Modbus mode Modbus made Baudrate 19200 Stop Bits Default settings User can read or edit and save Modbus RTU baud rate and parity control mode or restore default settings 9 7 Restore default settings User can restore default settings for the following parameters Zero point calibration Pressure sensor calibration Analogue output calibration current loop 4 20 mA mode configuration mode You can restore default settings if you changed some settings accidentally and you are not able to perform calibration to your own settings Please remember that this operation will restore calibration settings defined by the manufacturer If you have already calibrated the transmitter to your own settings all your calibration settings will be lost as a result of this operation Return to factory settings Undo Zero trim Sensor trim Undo Analog output trim 2 29 DTR PCE PRE SGE MODBUS ENG 5 8 Write lock Write protection Witte protected Set Wi rite Change Customer You can enable write protect to prevent modification of the transmitter s parameters or the code necessary to disable write lock The write protect code consists of 8 hexadecimal characters 1 0
14. range can be described as P Pd 0 5x Pg Pd Pg 0 5x Pg Pd Example A pressure transmitter for which Pd 0 kPa Pg 100 kPa will process pressure in the range of 50 kPa to 150 kPa If the pressure continues to increase beyond the permissible range the read value will not change 4 2 3 Register 5 Pressure of sensor 2 0x0004 Constant 0 IEEE754 4 bytes 2 registers Standby register Data variables to be read are always zero 4 2 4 Register 7 Temperature of sensor sensor 1 temperature 0x0006 Temperature of sensor 1 IEEE754 4 bytes 2 registers process variable at C Value of the temperature process variable in read from the transmitter s measuring head This value reflects the temperature of the measuring sensor and an approximate temperature of the medium depending on the application 4 2 5 Register 9 CPU temperature CPU temperature 0x0008 CPU temperature process variable IEEE754 4 bytes 2 registers at C Value of the temperature process variable read from the transmitter s CPU This value reflects the temperature of the transmitter s electronic circuits 4 2 6 Register 11 Temperature of sensor 2 0x000A Temperature of sensor 2 Constant 0 C IEEE754 4 bytes 2 registers Standby register Data variables to be read are always zero 4 2 7 Register 13 Standby a 2 2 eere EE Standby register Data variables to be read are always zero 4 2 8 Reg
15. 00 0 0 4 DO BC 7D D0 O0 01 0000 Device 00000001 Unit DTR PCE PRE SGE MODBUS ENG Description Float Percent of range Pressure measured kPa E E 1 100 5 1 100 17100 k 17100 17100 17100 5 m Float Float Sensor temperature Float Electronic temperature Float Signed 16 bit int Signed 16 bit int Signed 16 bit irt Signed 16 bit int Signed 16 bit int Signed 16 bit int Signed 16 bit int Fercent of range Pressure measured Sensor temperature Electronic temperature 16 bit int 16 bit int 46 bit hex 16 bit int Switch ta Configuration Made Modbus mode COMS 19200 Even 1 Then switch the transmitter from the Modbus mode to the Configuration mode Switch to Configuration Mode 2 3 2 26 DTR PCE PRE SGE MODBUS ENG Transmitter identification data Device identification ID Device ID 00000001 Universal command revisian Software revision Device type code Transmitter specific command rev Hardware revision 4 Device function Freambles Private label distributor cade Final assembly Sensor serial number 711 number Polling address L cm Modbus address Identification data frames example Read only values are shaded Read only information fields Manufacturer ID manufacturer
16. 1 register Value of the temperature process variable in read from the transmitter s measuring head This value 15 an integer sent in scalable binary format as a value 100 times greater than the value of the sensor temperature process variable This value reflects the temperature of the measuring sensor and an approximate temperature of the medium depending on the application 4 2 13 Register 21 CPU temperature binary format integer and sign 0x0014 CPU temperature oigned 16 bit int 2 bytes 1 register Value of the temperature process variable in read from the transmitter s CPU This value 15 integer sent in scalable binary format as a value 100 times greater than the value of the CPU temperature process variable This value reflects the temperature of the transmitter s electronic circuits 4 2 14 Register 23 Pressure unit 2 bytes 1 register see 23 0 0016 Pressure unit Unsigned 16 bit int 00 DTR PCE PRE SGE MODBUS ENG Part 1 tab p 2 5 1 Binary value corresponding to the pressure unit The table below shows the units used Value decimal number Ut Value decimal number 14 mbar InH2O in 49C 238 mw 03 P MH 4 2 15 Register 24 Standby 00017 ener 2 bytes 1 register Standby register Data variables to be read are always zero 2 21 DTR PCE PRE SGE MODBUS ENG 4 2 16 Register 25 Upper sensor limit 0x0018 sensor limit dud DO
17. PLISENS DTR PCE PRE SGE MODBUS ENG APLISENS MANUFACTURE OF PRESSURE TRANSMITTERS AND CONTROL INSTRUMENTS Part 1 USER S MANUAL Part 2 Selected issues concerning the operation of transmitters using Modbus Configurator SUPPLEMENT TO DTR PCE PRE 28 02 ENG DTR SG 05 ENG PRESSURE TRANSMITTERS TYPE PCE 28 MODBUS PRE 28 MODBUS SMART LEVEL PROBES TYPE SGE 25 SMART MODBUS SGE 25S SMART MODBUS Edition C2 WARSAW AUGUST 2015 APLISENS S A 03 192 Warszawa ul Morelowa 7 tel 48 22 814 07 77 fax 48 22 814 07 78 www aplisens pl e mail aplisens aplisens pl oymbols used Symbol Warning to proceed strictly in accordance with the information contained in the documentation in order to ensure the safety and full functionality of the device Information particularly useful during installation and operation of the device Information on disposal of used equipment BASIC REQUIREMENTS AND SAFE USE The manufacturer will not be liable for damage resulting from incorrect installation failure to maintain the device in a suitably functional condition or use of the device other than for its intended purpose Installation should be carried out by qualified personnel having the necessary authorisation to install electrical and pressure measuring devices The installer is responsible for performing the installation in accordance with these instructions and with the electromagnetic
18. art Modbus SGE 25S Smart Modbus Metrological parameters 3 2 3 PCE 28 Modbus PRE 28 Modbus SGE 25 Smart Modbus SGE 25S Smart Modbus 3 2 4 Data layout registers in address space 4 DAM Codes OL 16551 SUN EDD TOR Ue SIEMENS HEMOS ELA 5 2 5 status let cao E ODIT E emu ee 5 2 6 Error codes supported by 5 Connecuon via PMID Cables zuo di rr UR edd ob or ue edis 5 4 Connecting transmitters Modbus fe EWOTK eo e a olas pip vitet a t er elus a Dx esee den ms 7 PART 2 l PULIDOSEUus oo SE Eram 9 2 Physical layer for RS485 data 9 2 1 Denier Pc 9 Deser UOM Peut auisque dictan citet 9 2 3 Details of RS485 half duplex essence ois cic slot get aes hes 9 2 3 1 Limited digital signal incremental 9 237 211 22 eM LU NE M D nae 9 233 11005505 Mesi 9 2324 a a etude rd ee eco 10 23 9 Jane 10 2 3 6 mode voltage on RS485 bus 1 s eeeessesseeseeeeeeee eee enennn nnn rrr nnn nnns 10 MODBUS Data Dink teGURE 11 3 1 Modbus RTU
19. ation Polarization resistors can be used for ensuring permanently defined voltage levels in relation to power supply on the communication bus The resistors are connected respectively between point A on the bus and Vcc point between point B on the bus and GND point They are necessary if any of the transceivers of the devices connected to the bus 15 not a fail safe transceiver The resistance of such resistors depends on the power supply connected to the bus input current in the connected devices operated in receiving mode and it should be calculated or determined experimentally It usually ranges from 450 to 650 Q If the master device is in fail safe mode and only works with Modbus transmitters from Aplisens polarization resistors are not required The APLISENS transmitters described in this document are NOT integrated with polarizations resistors 2 3 6 Common mode voltage on RS485 bus The permissible common mode voltage levels on the transmission line compared to GND are 7 12V Such levels are necessary for correct operation of the devices Always connect the master s converter s GND terminal with the transmitter s GND terminals Transmission line definitions Signal pesa uon m rm Designation acc to EIA transceiver manufacturers Inverted BA Simple AB 2 11 DTR PCE PRE SGE MODBUS ENG 3 MODBUS Data Link Layer This chapter describes data transfer on the bus Data and their control structures are divided i
20. compatibility and safety regulations and standards applicable to the type of installation The device should be configured appropriately for the purpose for which it is to be used Incorrect configuration may cause erroneous functioning leading to damage to the device or an accident In systems with pressure transmitters there exists in case of leakage a risk to personnel on the side where the medium is under pressure All safety and protection requirements must be observed during installation operation and inspections If a device is not functioning correctly disconnect it and send it for repair to the manufacturer or to a firm authorised by the manufacturer In order to minimise the risk of malfunction and associated risks to personnel the device is not to be installed or used in particularly hostile conditions where the following risks occur possibility of mechanical impacts excessive shocks and vibration excessive temperature fluctuation condensation of water vapour dust icing Changes in the production of transmitters may precede a paper updating for the user The current user manuals are available at http www aplisens pl 2 1 DTR PCE PRE SGE MODBUS ENG PART 1 Iz TAO CUCU OD cecidit E on sme 3 25 Technical SPECI 8 565 18 OMS 3 2 1 PCE 28 Modbus PRE 28 Modbus Metrological 3 2 2 SGE 25 Sm
21. ded in gray are not active in specified models 2 17 DTR PCE PRE SGE MODBUS ENG 4 1 1 Request message example 1 Master request and slave response sensor pressure read value Request message Slave Function Starting starting Number of Number of CRC L CRC H address address address in registers to registers to register H register L be read H be read L Response message Parameters Slave Function Data value sensor 1 pressure in CRC L CRC H address IEEE754 format hexadecimal data bytes numbers 40 SF DI BC 4 2 Request message example 2 Master request and slave response read total accessible address space Request message Slave Function Starting starting Number of Number of CRC L CRC H address address in address in registers to registers to register H register L be read H be read L Response message Slave Function Parameters CRC L CRC H address Number of Memory content in registers read 0x48 00 00 00 00 40 SF F8 DD 00 00 00 00 0x97 0xCE 41 00 00 41 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 01 5E 00 00 09 C4 09 C4 00 00 00 0C 00 00 42 C8 00 01 00 00 00 00 00 00 00 00 00 00 00 01 00 BC 7D 00 00 01 00 00 18 DTR PCE PRE SGE MODBUS ENG 4 1 3 Register list for Example 2 User specific 40 5F F8 DD 3 0 0002 Pressure of sensor 1 IEEE754 40 5F F8 DD 4 bytes 2 registers 4 bytes 2 registers mm
22. difications have been introduced to the DTR PC PR SG MODBUS Operation Manual Edition 01 07 2014 Implementation of PCB version 48 Miniaturized printed circuit board with reduced dimensions Frequency of the CPU clock frequency changed from 14 74 to 3 68 MHz reduced power consumption A Additional D A transmitter and current source circuits to enable control in current loop mode 4 20 mA Change in the way signals are connected to the M12 electrical connection A Greater resistance to EMI interferences 2 33 DTR PCE PRE SGE MODBUS ENG 01 07 2014 Implementation of version 14 of the transmitter firmware The new version 14 of the firmware was designed in parallel with the introduction of version 48 of the electronic system and it introduced the following changes Eliminated option of a 10 bit word in serial transmission Starting from the software version 14 in accordance with the Modbus RTU standard MODBUS over Serial Line Specification and Implementation Guide v1 02 one character always consists of 11 bits If there 1s no parity bit 2 stop bits are used to achieve 11 bits in the character frame The following formats are used SEI default 801 8N2 Eliminated option of modifying the transmitter s response delay In the version 14 this time interval is set to 0 and depends on such factors as the number of data read using function 03 defined transfer rate and coincidence of the request
23. e connected parallel to the power supply to the transmitter Next select an appropriate current calibration option in the calibration frame Current calibration should be best performed for 2 points of the current range 4 and 20 mA by default As soon as you enter the value from the milliammeter in the field Measured current the lower calibration point 4 mA press Trim to start calibration Repeat the above steps for the upper calibration point 20 mA DAC Calibration Calibrate lower point Lower trim point Upper trim point Close 2 3l DTR PCE PRE SGE MODBUS ENG 5 11 Current loop mode 4 20 mA 5 11 1 Set range If you intend to use the transmitter in current loop mode 4 20 mA you must check and set if necessary an appropriate measuring range The set range means that the lower pressure point 15 assigned to 4 mA start of the set range and the upper pressure point is assigned to 20 mA end of the set range 5 11 2 Configuration If you wish to continue in configuration mode after setting parameters to use the transmitter in current loop mode 4 20 mA you must save configuration settings To do so select Device Write on the top bar of the screen or click on the save configuration icon 2 1 0 195 1 Configuration made 5 11 3 Recommendations In the current loop mode 4 20 mA the communication terminals 5485 and RS485 B may only be used to configure the transmitter During operation
24. e of sensor 1 17100 Signed 16 bit int Senso temperature Processor 17100 Signed 16 bit rt Eleclroric bemperabure Temperature of serga 2 1A100 C Signed 16 bit int Unit Signed 16 bit int Upper senso limit Lower sensor limi J kPa Damping value 5 Response delay value mes Modbus address register Status register Switch to Configuration Mode Modbus mode COMS 19200 Even 1 Switch the transmitter from Modbus into configuration mode Switch to Configuration Mode The procedure to be followed if it is required to reconfigure parameters or identify an individual transmitter If the user wishes to identify an individual transducer and they are not sure whether it 1s operating in the Modbus or Configuration modes they shall use the Find transducer only one option nfigurator 2 1 0 195 Settings Help 2 24 DTR PCE PRE SGE MODBUS ENG Transmitter search parameters related to potential transmission settings must be configured in the opened window When in doubt as to the range of settings the best solution 15 to tick all the options Clicking the Scan button prompts the programme to start searching for a transmitter in a sequence starting from the Configuration mode and then it will go through an indicated range of transmission speeds and parity in the Modbus mode Searching for a transmitter in the Modbus mode 15 carried out with a broadcast
25. egister s address 15 0 0000 and the address of the register 17 is 0x0010 1 16 The data read from each register are sent by slave devices as 2 bytes per register where the first byte 15 older than the next one If data are read from multiple registers the data from slave devices are sent according to the register numbers Registers contain data related to measurements of process values temperatures and other transmitter settings A list of registers their addresses and descriptions are shown in the table below 4 11 1 3 9 7 1 1 13 15 17 1 1 2 2 2 2 2 2 2 2 3 3 OO D OO O 8 9 0 1 2 3 4 5 7 9 1 2 10 DTR PCE PRE SGE MODBUS ENG Data layout registers in address space Read only data Address hex 0x0000 0x0002 0x0004 0x0006 0x0008 0x000A 0 000 0 0010 0 0011 0 0012 0 0013 0x0014 0x0015 0x0016 0x0017 0x0018 0x001A 0 001 0 001 0x001F 0x0020 0x0023 Purpose User specific Pressure of sensor 1 Pressure of sensor 2 Temperature of sensor 1 CPU temperature Temperature of sensor 2 User specific Pressure of sensor 1 Pressure of sensor 2 Temperature of sensor 1 CPU temperature Temperature of sensor 2 Pressure unit Upper sensor limit Lower sensor limit Damping value seconds s Response delay value
26. entification data Sedes neu quee EN pus du 26 5 3 Reading the transmitter s limit values and process 21 5 4 Reading alphanumeric identification 2 5 5 Damping and transfer 28 S6 NTO DO SIDE ET 28 5 7 Restore default settings tae roe tod i pueda 28 5 1 c 29 5 9 Set pressure zero restart 29 510 Calibrations 29 5101 Pressure ot level Cali Ora mon ose terere timet netu Ete ie 29 5 10 2 URSIN e dDDES mde CENE located aunts a oM Cun 30 5 11 Current loop mode 4 20 DEA a n esten tuse tin apes ee qon dea OH ea d tue n idR e QUod eae 3l 5 11 1 1012 HET 31 5 11 2 Cu Mec E 31 5 11 3 Recomendados E E E E O SS 31 MOUDUS modes 31 6 and software Versions cccccceccscaccscscoscecsececaccscaccscsccecscsececaccscasescacescscnececacascascscacesees 32 2 3 DTR PCE PRE SGE MODBUS ENG PART 1 1 Introduction This User Manual concerns the PCE 28 Modbus PRE 28 Modbus pressure transmitters and the SGE 25 Smart Modbus SGE 25S Smart Modbus level probes with the output signal Modbus RTU 4 20 mA and manufactured after July 2014 provided with at least
27. es 2 registers 0x000A Temperature of sensor 2 IEEE754 4 bytes 2 registers m qo bytes 2 registers 5 Ox000E Mq bytes 2 registers 1 100 of the 7 0x0010 User specific controlled serge Signed 16 bit int 2 bytes 1 register 0 0011 Pressure of sensor 1 d MOT s Signed 16 bit int 2 bytes 1 register pressure or level unit Value 0 1 0x0012 Pressure of sensor 2 1 100 of the selected Signed 16 bit int unit Integer 20 0x0013 Temperature of sensor 1 1 100 C Signed 16 bit int 2 bytes 1 register Integer oe 2 0x0014 CPU temperature 1 100 C Signed 16 bit int 2 bytes 1 register Value 0 22 0 0015 Temperature of sensor 2 Signed 16 bit int 2 bytes 1 register 1 100 at C 2 bytes 1 register 2 bytes 1 register 3 0 0016 Pressure unit Pressure or level unit See Unsigned 16 bit int DTR PCE PRE SGE M ODBUS ENG Part 1 00017 p 2 bytes 1 register 5 0x0018 Upper sensor limit AUC bine IEEE754 4 bytes 2 registers standard range yt 5 7 0x001A Lower sensor limit IEEE754 4 bytes 2 registers standard range Damping value 0x001E vale Unsigned 16 bit int 2 bytes 1 register milliseconds ms 001 Modbus address 1247 Unsigned 8 bit int 2 bytes 1 register 0x0020 Identity register Unsigned 8 bit int 6 bytes 3 registers 0x0023 Status register
28. etwork address register The address is sent using 2 bytes The first older byte is always zero The second lower byte is used for the address The address can be set in the range of 1 to 247 Each transmitter connected to the network must have a unique network address If the same address is assigned to more than one transmitter the master will not be able to communicate with all present transmitters on the bus 4 2 21 Register 33 Identity register 33 0x0020 Identityregister Unsigned 8 bit int 6 bytes 3 registers An identifier of the manufacturer type and serial number of the transmitter A unique identifier different for each transmitter Identification of bytes according to the transmission sequence 1 byte insignificant always 0 27 byte manufacturer s number acc to HCF APLISENS number 199 dec hex 3 byte device type number number for the transmitters described 1n this document 125 dec 7D hex 4 _6 byte 24 bit binary identification number of the device This number identifies the date of manufacture and serial number 4 2 22 Register 36 Status register 36 0x0023 Statusregister 8bitlags 2 bytes 1 register A 2 byte register monitoring the functioning of the transmitter s subsystems Events and the transmitter s irregularities modify bits contained in the register see DTR PCE PRE SGE MODBUS ENG Part 1 p 2 5 Modbus status register These irregularities can be identified
29. he specified models 25 27 9 4 2 Data from registers readable using function 03 4 2 1 Register 1 User specific of the controlled set range 0 ser specific es 2 registers iix MM nad dido set range It is a control value of the set range expressed in percentage points For example if the measuring range 15 0 100 and the currently read out value of pressure 15 50 kPa then the control value equals 50 This value may be applied by the user to perform additional mathematical operations on it resolver This value may also be converted in a transmitter using quadratic cubic root or linear multi section functions It may be used e g to measure the flow through orifices or to calculate volume in tanks of various shapes 2 19 DTR PCE PRE SGE MODBUS ENG 4 2 2 Register 3 Pressure of sensor 1 3 0x0002 Pressure of sensor 1 eee IEEE754 4 bytes 2 registers process variable Basic process variable pressure or level standardized for the selected physical unit This value 15 sent in 4 byte floating point format conforming to IEEE754 The maximum readable pressure or level range lies between Lower sensor limit 0 5 x Upper sensor limit Lower sensor limit and 0 5 x Upper sensor limit Lower sensor limit Upper sensor limit In other words if the lower sensor limit 1s designated Pd and the upper sensor limit is designated Pg then the transmitter s maximum possible processing
30. ilent interval between two successive characters exceeds 1 5T the message can be considered invalid and rejected by the device Frame 1 OK Frame 2 NOK 4 cU to ERE 2 lt 1 5 gt 1 5 char The addressed slave must respond within a defined silent interval otherwise response message will be considered invalid and rejected by the master The silent interval between the request message sent by the master and the response message sent by the slave must not be shorter than 3 5 T where T is the time it takes to transmit one character 11 bits The maximum silent interval after which a slave device responds to the master request message depends on the function code in the request and the data load The response time in the APLISENS transmitters described in this document should be less than 5 ms including the most disadvantageous conditions data load transfer rate Frame 1 Frame 2 Frame 3 E p 3 5char I I at least 3 5 char at least 3 5 char ra 39 4 5 char MODBUS message End 2 15 DTR PCE PRE SGE MODBUS ENG 3 3 2 Error handling When messages are transferred between master and slave devices two main types of errors may arise transmission errors and slave device errors Transmission errors causes The message received is too short due to e g an excessively long interval between bytes contained in the message The message received i
31. ister 15 Standby a eese E EEA Standby register Data variables to be read are always zero 4 2 9 Register 17 User value 2 1 100 of the T 0x0010 controlled set range Signed 16 bit int 2 bytes 1 register A given value has been described in Register 1 Outside this index it also occurs in a 16 bit integer version with a sign 2 20 DTR PCE PRE SGE MODBUS ENG 4 2 10 Register 18 Pressure of sensor 1 binary format integer and sign Integer 1 100 of the 18 0x0011 Pressure of sensor 1 pressure or level Signed 16 bit int 2 bytes 1 register unit Value of the primary process variable pressure standardized for the selected physical unit of pressure or level This value is an integer sent in scalable binary format as a value 100 times greater than the value of the sensor pressure process variable Caution The measuring range for a scalable integer including its sign is in the range of 32767 to 32767 units If this range 1s exceeded a false value will be read This 1s valid for the following units g cm mbar mmH O in 4 C mmH O mmHg torr 4 2 11 Register 19 Pressure of sensor 2 Value 0 19 0x0012 Pressure of sensor 2 1 100 of the oigned 16 bit int 2 bytes 1 register selected unit Standby register Data variables to be read are always zero 4 2 12 Register 20 Temperature of sensor 1 binary format integer and sign 0x0013 Temperature of sensor 1 oigned 16 bit int 2 bytes
32. lphanumeric identification data Device information Tag Pe Alphanumeric identification data frame example User can read or modify the transmitter s alphanumeric identification data Tag is an 8 character alphanumeric field where you can enter e g an identification number of the transmitter in the system This field can contain digits and capital letters without national characters Descriptor is a 16 character alphanumeric field where you can enter a short description of e g an installation site This field can contain digits and capital letters without national characters Message is a 32 character alphanumeric field where you can enter a longer description This field can contain digits and capital letters without national characters 2 28 DTR PCE PRE SGE MODBUS ENG 5 5 Damping and transfer function Damping value 5 Transfer function User can read or modify the measurement damping value and transfer function type Damping value is expressed in seconds and describes the duration of a non determined status after which the process variable will achieve 63 2 of the total value change The process variable value will be nearly fully changed with an accuracy of below 1 after ca 5 time constants The transfer function determines the method of transforming a process variable related to pressure measurement pressure differences into a control value of a process output current or a percentage value of the set
33. lue field As soon as the read value 15 stable press Calibrate If calibration 1s successful an appropriate message will appear Repeat the above steps for the upper pressure limit If the difference between the reference pressure and the actual pressure read by the transmitter exceeds the permissible limit calibration will not be performed and an appropriate message will be displayed A similar situation arises 1f the selected calibration point lies outside the transmitter s lower or upper limit Calibration Calibrate lower point Lower trim point Upper trim point 2 30 DTR PCE PRE SGE MODBUS ENG 5 10 2 Current calibration If the transmitter 15 used current loop mode 4 20 mA it may be necessary to perform current calibration To do so select Device DAC calibration 4 20 mA analogue output calibration on the top bar of the screen Calibration DAC calibration Enter Fixed current mode Before analogue output calibrations check that the RS485 converter is galvanically isolated Using terminal or polarization resistors during analogue output calibration 15 not recommended If the RS485 converter is a fail safe converter resistors are not required The power supply to the transmitter should also be galvanically isolated The above procedures should be used to prevent uncontrolled current flow from the transmitter s controller branch which might cause a measurement error A reference milliammeter should b
34. nto groups and make up a message A message means the smallest communication unit and only such units can be transferred between devices Half duplex mode means that at a given point in time only one device can be in transmitting mode while the other devices must be in receiving mode A PC or a controller is a master device and the connected measuring or execution devices are slave devices Messages are transferred at all times under the control of the master device All messages contain a slave address As a result two options of data transfer are available Broadcast mode In this communication mode the master device can send a broadcast message to each slave device whatever its network address In the APLISENS transmitters described in this document broadcast mode is intended for reading the defined network address using function 3 function code 3 Given that each connected transmitter responds to a message containing a broadcast address function 3 in this mode should only be used for a single slave device connected to the master device Data transfer mode This mode enables communication between the master device and a selected slave device The communication process involves sending a request message from the master device and a response message from an appropriate slave device Only the master device can send request messages The request 15 received by all slave devices connected to the bus however only a device with an addres
35. ower than the basic range It 1s defined mostly to configure a transmitter to operate in the 4 20 mA current loop mode In this mode the start of the set range corresponds to the current of 4mA and the control percentage of 0 whereas the end of the set range corresponds to the current of 20mA and the control percentage of 100 Both the value of current in a current loop in the 4 20mA mode and the percentage of set range control may be converted with the transfer function defined in the Configuration mode In the Modbus operating mode the percentage of the set range control 0 100 may be used by the user to convert this value into any other value by performing a mathematical operation in a resolver At the same time when a root function 15 set in the transmitter it may be used to read out flows through orifices or reducers The information entered by a transmitter to register 31 in version 15 of the firmware describes the actual time between the end of a bit stop of the last byte of the CRC checksum in a request message and a bit start of the byte of the transmitter answer message response time This time depends on the set speed of transmitter transmission within the range from 3ms to 20ms Small corrections increasing the comfort of use have been introduced to the Modbus Configurator software dedicated to transmitters at the same time incrementing it to version 2 1 0 195 Small corrections related to the afore mentioned mo
36. rial communication bus appropriate leads RS485A RS485B GND and Vcc should be connected in parallel to the bus Before connecting to the bus a unique address must be defined for each device A network of up to 1 200 meters with max 247 Modbus devices can be set up Each cable junction from the bus can be up to 15 m long The cables should conform to EIA RS485 9 DTR PCE PRE SGE MODBUS ENG MASTER max 1200m max 15m Fig Modbus network configuration example 2 3 Details of RS485 half duplex To ensure the best possible efficiency in industrial environment the transmitters from Aplisens are provided with RS485 transceivers with appropriately customized operating parameters To provide compatibility and the best possible working conditions the master transceiver should conform to the specifications below 251 Limited digital signal incremental rate To eliminate oscillations and interferences the output voltage slew rate of the signals from the transmitters is limited by the use of appropriate RS485 transceivers This makes it possible to use standard cable based connections and or customized topologies e g branches up to 15 m long 2 325 Fail safe mode The fail safe mode means a strictly defined level of received signals both in open bus connection and closed bus connection modes It is very important in half duplex mode when all the devices connected to the bus are in receiving mode This approach
37. s specified in the message sends a response A slave device must respond to a correctly received request message within the defined maximum time interval otherwise the master device recognizes that the request failed and will retry sending the message in accordance with the programmed algorithm 2 12 DTR PCE PRE SGE MODBUS ENG 3 1 Modbus RTU serial transmission mode in transmitters PCE 28 Modbus PRE 28 Modbus and level probes SGE 25 Smart Modbus SGE 25S Smart Modbus Data in the RS485 bus are transmitted serially As described in the Modbus RTU standard MODBUS over Serial Line Specification and Implementation Guide v1 02 the following formats can be used 1 start bit 8 data bits binary coding least significant is bit sent first bits for parity checking bit Even default or 1 bit Odd or 0 bits None no bits for parity control stop bit for Even or Odd parity mode or 2 stop bits for None parity mode Characters are always sent using 11 bits The number of stop bits 1 or 2 is selected by the transmitter depending on whether an Even Odd or None parity mode 15 set With Parity Checking Bit sequence with parity checking Without Parity Checking EELEE EEE Bit sequence without parity checking 2 13 DTR PCE PRE SGE MODBUS ENG 3 2 Modbus RTU message format All Modbus RTU messages are sent in the following format Slave Function Address 1 byte 1 byte 0 up to 252 byte s
38. s and limit values example Lower sensor limit A read only value If exceeded accuracy of measurements using transmitter cannot be guaranteed However the transmitter will continue to process measuring signals up to 50 of the basic range below this point Upper sensor limit A read only value If exceeded accuracy of measurements using the transmitter cannot be guaranteed However the transmitter will continue to process measuring signals up to 50 of the basic range above this point Minimum span read only value that defines the minimum width of the set range modifiable by user by changing the start and or the end points of the range This parameter is also important when calibrating pressure or level If intervals between calibration points are insufficient the transmitter cannot be calibrated Lower range value Value related to the current loop mode 4 20 mA Specific pressure or level 15 assigned to the current of 4 mA Upper range value Value related to the current loop mode 4 20 mA Specific pressure or level is assigned to the current of 20 mA Standard unit is the physical unit used for standardizing measurements performed with the transmitter definable by user PV is the value of the pressure or level process variable standardized basic unit as defined Additionally the output current process variable 4 20 mA 15 displayed To refresh the value click on the button Read PV Reading a
39. s code according to HCF HART specifications Device ID transmitter s serial number Software revision CPU software version Hardware revision transmitter s PCB version Preambles number of preambles used for communication in configuration mode Pooling address address used for communication in configuration mode Device type code code indicating the transmitter type Universal command revision number in configuration mode Transmitter specific command revision number in configuration mode Device function flags related to record handling type Private label distributor code Editable information fields Final assembly number of the device recorded in binary format using 3 bytes an integer in the range of 0 16777215 used for identification modifiable by user Sensor serial number recorded in binary format using 3 bytes an integer in the range of 0 16777215 used for identification modifiable by user Modbus address an integer in the range of 1 247 modifiable by user The field Modbus address used for defining the transmitter s network address 1s highly significant 2 3 9 5 4 27 DTR PCE PRE SGE MODBUS ENG Reading the transmitter s limit values and process variables Process values kPa kPa kPa kPa Lower sensor limit Upper sensor limit Minimum span Lower range value Upper range value 100 kPa Unit kPa Py 0 000 kPa TE Frame containing process variable
40. s longer than allowed by device s reception buffer due to e g message frame syntax improperly programmed in the controller The maximum character transmission time 15 exceeded due to an inappropriate transfer rate The control sum calculated based on the message received does not correspond to the value sent in the message in the CRC field Slave devices do not respond to messages for which a transmission error is detected the master device can retry sending a request message if an invalid message receipt is detected The respective algorithm is programmed in the master device Illegal function code Illegal data address Illegal data load Slave device errors causes Transmitter failure RAM FLASH memory errors Error codes conform to MODBUS over Serial Line Specification and Implementation Guide v1 02 For error codes and their descriptions see DIT R PCE PRE SGE MODBUS ENG Part 1 section 2 6 Error codes supported by Modbus 4 Application layer function 03 The transmitters PCE 28 Modbus PRE 28 Modbus and the level probes SGE 25 Smart Modbus SGE 25S Smart Modbus are provided with the function 03 Read Holding Register This function code is used to read the contents of a contiguous address space in a data block The master device specifies a starting address of the register 2 bytes and the number of 2 byte read registers The registers are addressed starting from zero therefore e g the first r
41. serial transmission mode in transmitters PCE 28 Modbus PRE 28 Modbus and level probes SGE 25 Smart Modbus SGE 25S Smart Modbus esse 12 3 2 RTU message Pormat ud oan eee a epu bdo 13 3 3 Modbus RTU message transfer 14 55 MN oder ERE ERES 14 3 92 2 nrerin staat ss CUu Er p 15 4 Application layer function 03 15 411 Reg uestmessase exathile D saa 17 41 2 3R questmessase example 2 lof o iai 17 2 1 5 Resister HSE Tot 2 ttem lande en dente ba emere pde as enum tss 18 4 2 Data from registers readable using function 03 18 4 2 1 Register 1 User specific of the controlled 18 4 2 2 Resister Pressure Of Sensor tidie Este nte rade 19 4 2 5 PEOSSUfG OL SENSOR Z Cete ionic tant oni ome odor 19 42 4 Resistor 7 Temperature OF Sensor 1 hv des Mas 19 42 5 UTE 22 Dru teas ots t duds 19 42 0 LL Temperature oL Sensor ee d e Dto dou LU 19 425 5 AS tam Dy tu drame
42. software version 14 and PCB printed circuit board version 48 It is a supplement to the User Manuals numbered DTR PCE PRE 28 02 ENG DTR SG 05 ENG The permissible environment and operating parameters product materials process connections degree of protection of the housing and measuring ranges are the same as in PCE 28 PRE 28 SGE 25 Smart SGE 25S Smart products Process variables and other configuration data can be read using the protocol Modbus RTU To perform configuration or calibration of the transmitter you need a PC the converter RS 232 RS 485 USB RS 485 port and the configuration software Modbus Configurator from Aplisens In addition to the interface RS485 Modbus RTU the transmitters provided with at least software version 14 and PCB version 48 can be used in current loop mode 4 20 mA 2 Technical specifications 2 1 PCE 28 Modbus PRE 28 Modbus Metrological parameters Accuracy of 4 20 mA digital and analogue output 0 1 basic range Long term stability lt accuracy per 2 years for basic range Thermal error of 4 20 mA digital and analogue output lt 0 08 FSO 10 C max 0 25 FSO for the whole thermal compensation range Thermal compensation range 25 80 C other ranges available on request Additional electronic damping 0 30 5 Pressure ranges other parameters see PCE 28 PRE 28 acc to DIR PCE PRE 02 ENG 2 2 SGE 25 Smart Modbus SGE 25S Smart Modbus Metrological parameters Stability acc
43. t least software version 14 and PCB version 48 If you intend to use the operating mode 4 20 mA leave the transmitter in configuration mode after setting parameters using Modbus Configurator Additional settings for the 4 20mA operating mode exceeding the range of options of Modbus Configurator are possible with the Raport 2 application If you intend to use Modbus mode switch the transmitter into Modbus mode after setting parameters using Modbus Configurator The measuring range for 1 100 of a non decimal unit including its sign lies in the range of 32767 to 32767 units If this range 15 exceeded a false value will be read This 15 valid for the following units g cm mbar mmH5O at 4 C mmH5O mmHg Pa torr A resistor adapting 120 Q between Digital A and B outputs should be used for all transfer rates especially for 115200 bps 3 1 When using devices with MODBUS RTU output signal it is convenient to use appropriate junction boxes We recommend using Aplisens junction boxes designated PP Modbus 2 7 DTR PCE PRE SGE MODBUS ENG 4 Connecting transmitters to Modbus network transmitt Ep IEEE box PP Modbus u i u C o p 16 N ai a 3 e e e 1200m max ransmitter box PP Modbus 2 8 DTR PCE PRE SGE MODBUS ENG PART 2 Purpose This chapter describes a communication protocol used in devices provided with a Modbus digital outp
44. they should not be connected to any device isolated and left loose In an environment with very high EMI levels exceeding the exposure limits defined in EN 61000 and when using unshielded cables it is not recommended connecting the communication line RS485 A and RS485 B into the cable 5 12 Modbus mode After configuring the transmitter as necessary to restore Modbus mode you must save new settings Click on the button Switch to Modbus mode to save new settings and switch the transmitter into Modbus communication mode Switch to Modbus mode 2 32 DTR PCE PRE SGE MODBUS ENG 6 PCB and software versions 01 05 2015 Implementation of version 15 of the transmitter firmware The management of the data connection layer in the transmitter software has been improved Under certain conditions a transmitter may have failed to send a response to a correctly sent request message The implemented patch has removed this fault The option of reading a percentage value of the controlled set range from the transmitters in the Modbus mode has been added A variable of the IEEE754 float type with a header 15 sent on 4 bytes Number of bytes Intended use Format 2 bytes per register Regist Address er hex A variable of 16 bit integer type with a header 15 sent on 2 bytes The set range is defined in the Configuration mode Lower range value ij range salue kPa The set range may be equal to or l
45. uracy and thermal error see PCE 28 Modbus PRE 28 Modbus Compensation temperature range 25 80 C other ranges available on request Measuring ranges other parameters see SGE 25 Smart SGE 25S Smart acc to DTR SG 05 ENG 2 3 PCE 28 Modbus PRE 28 Modbus SGE 25 Smart Modbus SGE 25S Smart Modbus Electrical parameters Power supply voltage in MODBUS RTU mode 4 28 V DC Power supply voltage 4 20 mA mode 5 28 V DC Power consumption lt 3 6 mA in Modbus mode Output signal MODBUS RTU or current loop 4 20 mA DC Transmitter D A 16 bit 28 Hz PWM Electrical connection 5 pin M12 connector male or cable Digital transmission range 1200 m shielded twisted pair cable Address space 1 247 addresses Max devices per bus 256 Transfer rate 1200 2400 4800 9600 19200 28800 38400 57600 115200 bps Transfer parity control no parity odd even Data load per transfer frame 11 bit 8N2 SEIT 801 Response time 3 20ms depending on the speed of transmission The transmitters comply with the requirements of standard EN 61000 4 2 3 4 5 6 11 2 4 DTR PCE PRE SGE MODBUS ENG 2 4 Data layout registers in address space Read only data Address Bytes 2 bytes per register 0 process variable 0 0004 IEEE754 4 bytes 2 registers sensor temperature 0x0006 Temperature of sensor 1 process variable at 6 IEEE754 4 bytes 2 registers CPU temperature EN 0x0008 CPU temperature process variable st 56 IEEE754 4 byt
46. ut manufactured by APLISENS S A Pressure transmitters PCE 28 Modbus PRE 28 Modbus Level probes SGE 25 Smart Modbus SGE 25S Smart Modbus with PCB version 48 and software at least from version 14 The above protocol conforms to the standard published by Modbus organization see http www modbus org in the documents MODBUS Application Protocol Specification v1 1 MODBUS over Serial Line Specification and Implementation Guide v1 02 and MODBUS Application Protocol Specification v1 1 The number of the transmitter s PCB and software versions can be checked in configuration mode in the frame Device identification via Modbus Configurator from APLISENS Modbus Configurator 2 1 0 195 File Device Settings X Help Device identificatian Manufacturer 188 Devi Device ID 2 00000001 Software revision Hardware revisian Devi Tran 2 Physical layer for RS485 data transfer 2 1 Introduction The transmitter is connected to the system via RS485 serial interface This interface guarantees high resistance to interferences and flexible bus structure e g multiple slave devices can be managed via a single master device An RS485 half duplex mode has been implemented to reduce the number of necessary communication cables This means that 2 communication cables are required The other 2 cables are used for power supply distribution 2 2 Description To ensure correct operation of multiple devices on one se
47. with the transmitter s automated programme This time interval should not be greater than 5 ms Eliminated Modbus transfer rate of 600 b s Reduced consumption and optimized input energy management Optimized time critical procedures Implemented functions related to operation of the transmitters 1n current loop mode Implemented functions related to configuration of the transmitters in current loop mode 24 06 2015 Correction of pressure units for the codes 1 2 10 12 in table p 2 4 1 01 09 2015 Complement the information regarding power supply for 4 20 mA operation mode in p 2 3
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