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tm-th8 user manual

1. 70 User defined 5000 15000 71 User defined 5000 15000 72 User defined 5000 15000 73 User defined 5000 15000 74 User defined 5000 15000 75 User defined 5000 15000 76 User defined 5000 15000 77 User defined 5000 15000 The under range value is 32768 and the over range value is 32767 For the hex data format please refer to Section 1 10 130 tM TH8 User Manual Rev A1 0 7MH 018 A10 4 Troubleshooting If you are having difficulty using the tM series module here are some suggestions that may help If you cannot find the answers you need in these guides contact ICP DAS Product Support Contact information is located in Section 1 14 tM TH8 User Manual Rev A1 0 7MH 018 A10 131 4 1 Communicating with the module If you attempt to communicate with the module and receive no response first check the following oO 132 Ensure that the supplied power is within the range of 10 to 30 V DC Ifthe supplied power is OK then the power LED should be on When the module receives a command the power LED is set to off The power LED is shown as on after the module responds This method can be used to check whether the module has received a command sent from the host If possible use another device to check whether the host can communicate with the device through the same RS 485 network If the host is a PC installed with a Windows operating system then execu
2. gt Init i E i E d tM TH8 User Manual Rev A1 0 7MH 018 A10 135 A 2 Dual Watchdog Operation Dual Watchdog Module Watchdog Host Watchdog The Module Watchdog is a hardware reset circuit that monitors the operating status of the module While working in harsh or noisy environments the module may be shut down by external signals The circuit allows the module to work continuously without disruption The Host Watchdog is a software function that monitors the operating status of the host Its purpose is to prevent problems due to network communication errors or host malfunctions When a host watchdog timeout occurs the module will reset all outputs to a safe state in order to prevent any erroneous operations of the controlled target The tM series modules include an internal Dual Watchdog making the control system more reliable and stable For more information regarding the Dual Watchdog please refer to Chapter 5 of the Getting Started For 1 7000 Series Modules manual that can be downloaded from the ICP DAS website http www icpdas com 136 tM TH8 User Manual Rev Al 0 7MH 018 A10 A 3 Frame Ground Electronic circuits are constantly vulnerable to ESD which become worse in a continental climate area The tM modules feature a new design for the frame ground The frame ground provides a path for bypassing ESD which provides enhanced static protection ESD abilities and ensures the module is more reliable
3. The DCON Utility available for downloaded from the ICP DAS website http www icpdas com can assist with the calculation of the Steinhart Coefficients and the conversion to IEEE 754 format Documentation for the DCON Utility can be found in the Getting Started For I 7000 Series Modules manual tM TH8 User Manual Rev Al 0 7MH 018 A10 23 1 12 tM TH8 Notes The Modbus RTU communication protocol is the default protocol of the tM series The communication Baud Rates for the Modbus RTU protocol can be in the range of 1200 bps to 115200 bps Modbus functions supported by the module are described in Chapter 3 1 12 1 Protocol Switching To switch to the DCON protocol 1 Uses sub function 06h of the function 46h and set byte 8 to a value of 1 See Section 3 6 4 for details Or set both of the Modbus registers 00257 and 00258 to zero 2 After a power on reset the communication protocol will be changed to DCON To switch to the Modbus RTU protocol 1 Sends the AAPN command and set N to a value of 1 Note that for the tM TH8 the slide switch of the module should be set to the INIT position see the figure on the next page See Section 2 17 for details 2 After a power on reset the communication protocol will be changed to the Modbus RTU protocol 24 tM TH8 User Manual Rev A1 0 7MH 018 A10 1 12 2 INIT Mode When the module is powered on with the slide switch set to the INIT position as shown in the figure below
4. Connect the frame ground terminal to a wire DIN rail and connect the wire DIN rail to the earth ground will provide a better protection for the module New DIN rail models are available that can easily be connected to the earth ground Each is made of stainless steel which is stronger than those made of aluminum There is a screw at one end and a ring terminal is included as shown in the figure below Refer to Section 1 13 1 for more information about the new DIN rail models tM TH8 User Manual Rev A1 0 7MH 018 A10 137 A 4 Reset Status The reset status of a module is set when the module is powered on or when the module is reset by the module watchdog It is cleared after the responding of the first AA5 command This can be used to check whether the module had been reset When the 4A5 command responds that the reset status is cleared that means the module has not been reset since the last AA5 command was sent When the AA5 command responds that the reset status is set and it is not the first time AA5 command is sent it means the module has been reset and the digital output value had been changed to the power on value 138 tM TH8 User Manual Rev A1 0 7MH 018 A10 A 5 Thermistor A thermistor is a temperature sensitive resistor that can be used in temperature measurement control and compensation circuitry For most thermistors the resistance decreases as the temperature rises and the relationship can be expressed as 1
5. Syntax AAA2CiToo CHKSUM CR Delimiter character AA Address of the module to be read 00 to FF A2 Command to set the temperature offset Ci 1 specify the input channel to be set 0 7 Too oo represents the temperature offset in 0 1 C F 12 8 12 7 Itis in hexadecimal format and 01 for 0 1 02 for 0 2 FF for 0 1 FE for 0 2 etc Response Valid command AA CHKSUM CR Invalid command AA CHKSUM CR Delimiter character for a valid command Delimiter character for an invalid command or invalid type code AA Address of the responding module 00 to FF There will be no response if the command syntax is incorrect there is a communication error or there is no module with the specified address tM TH8 User Manual Rev A1 0 7MH 018 A10 85 tM TH8 Examples Command 01A2C2T0A Response 01 Sets the temperature offset of channel 2 to 1 0 and the module returns a valid response Command 01A2CS5TFO Response 01 Sets the temperature offset of channel 5 to 1 6 and the module returns a valid response Related Commands Section 2 28 AAA3C1 86 tM TH8 User Manual Rev A1 0 7MH 018 A10 tM TH8 2 28 AAA3Ci Description Reads the temperature offset of a channel Syntax AAA3Ci CHKSUM CR Delimiter character AA Address of the module to be read 00 to FF A3 Command to read the temperature offset Ci 1 specify the input channel to be set 0 7 Response Valid command AA
6. 100 C 2 s comp HEX 7FFF 999A Ohms 000035 8 067660 0 Engineering unit 100 00 070 00 6s toon onc ofFSR_ 100 00 070 00 10 100 C 2 s comp HEX 7FFEF A667 Ohms 000106 4 132600 0 Engineering unit 150 00 050 00 e apo nsec LW OfFSR 100 00 033 33 50 150 C 2 s comp HEX 7FFF D556 Ohms 000041 8 15 1000 0 Engineering unit 150 00 040 00 O O asac ofFSR 100 00 026 67 AQ 150 C 2 s comp HEX 7FFF DDDE Ohms 000055 6 101000 0 tM TH8 User Manual Rev A1 0 7MH 018 A10 Type Code Thermistor Data Format F S F S Type Engineering unit 150 00 040 00 6s soon acc L_2OFFSR__ 100 00 026 67 AQ 150 C 2 s comp HEX 7FFF DDDE Ohms 000092 7 168300 0 Engineering unit 150 00 030 00 0 6000 asac L__ Of FSR_ 100 00 020 00 30 150 C 2 s comp HEX 7FFEF E667 Ohms 000111 5 106200 0 Engineering unit 150 00 030 00 cal toe asec _ ofFSR 100 00 020 00 30 150 C 2 s comp HEX 7FFEF E667 Ohms 000185 9 177000 0 Engineering unit 150 00 030 00 oe ae of FSR 100 00 020 00 30 150 C 2 s comp HEX 7FFF E667 Ohms 000237 0 135200 0 Engineering unit 200 00 010 00 ee oo z o of FSR 100 00 005 00 10 200 C 2 s comp HEX 7FFF F99A Ohms 000186 7 158000 0 Engineering unit 150 00 050 00
7. 02 Performs a zero calibration on module 02 and returns a valid response Command 031 Receive 03 Performs a zero calibration on module 03 An invalid command is returned because the enable calibration command was not sent in advance Related Commands Section 2 4 AAO Section 2 21 AAEV Related Topics Section 1 9 Calibration Notes The enable calibration command AAEV must be sent before this command is used see Section 1 9 for details tM TH8 User Manual Rev A1 0 7MH 018 A10 43 tM TH8 2 6 AA2 Description Reads the module configuration Syntax AA2 CHKSUM CR Delimiter character AA Address of the module to be read 00 to FF 2 Command to read the module configuration Response Valid Command AATTCCFF CHKSUM CR Invalid Command AA CHKSUM CR Delimiter character for a valid command Delimiter character for an invalid command AA Address of the responding module 00 to FF TT Type code of the module see Section 1 10 for details CC Baud Rate code of the module see Section 1 10 for details FF Data format checksum settings and filter settings of the module see Section 1 10 for details There will be no response if the command syntax is incorrect there is a communication error or there is no module with the specified address 44 tM TH8 User Manual Rev A1 0 7MH 018 A10 tM TH8 Examples Command 012 Response 01200600 Reads the configuration of module
8. CR Invalid Command AA CHKSUM CR Delimiter character for a valid command Delimiter character for an invalid command AA Address of the responding module 00 to FF There will be no response if the command syntax is incorrect there is a communication error or there is no module with the specified address 70 tM TH8 User Manual Rev A1 0 7MH 018 A10 tM TH8 Examples Command 01DC Response 01 Sets the temperature scale of module O01 to Celsius and returns a valid response Command 02DF Response 02 Sets the temperature scale of module 02 to Fahrenheit and returns a valid response Related Commands Section 2 19 AAD Notes 1 The default temperature scale is Celsius 2 The commands affected are AA AAN and AARTTttR Data tM TH8 User Manual Rev A1 0 7MH 018 A10 71 tM TH8 2 21 AAEV Description Enables Disables the module calibration Syntax AAEV CHKSUM CR Delimiter character AA Address of the module to be enabled disabled 00 to FF E Command to enable disable calibration V 1 enable calibration 0 disable calibration Response Valid Command AA CHKSUM CR Invalid Command 7AA CHKSUM CR Delimiter character for a valid command Delimiter character for an invalid command AA Address of the responding module 00 to FF There will be no response if the command syntax is incorrect there is a communication error or there is no module with the specified
9. OK others error Error Response 00 Address 1 Byte 1 to 247 01 Function code 1 Byte OxC6 02 Exception code l Byte 03 type code out of range channel out of range reserved bytes should be filled with zero incorrect number of bytes received 122 tM TH8 User Manual Rev A1 0 7MH 018 A10 tM TH8 3 6 7 Sub function 32 0x20 Read firmware version This sub function code is used to read the firmware version information of a module Request 00 Address 1 Byte 1 to 247 01 Function code 1 Byte 0x46 02 Sub function code 1 Byte 0x20 Response 00 Address 1 Byte 1 to 247 01 Function code 1 Byte 0x46 02 Sub function code 1 Byte 0x20 03 Major version 1 Byte 0x00 OxFF 04 Minor version 1 Byte 0x00 OxFF 05 Build version 1 Byte Ox00 OxFF Error Response 00 Address 1 Byte 1 to 247 01 Function code 1 Byte OxC6 02 Exception code l Byte 03 incorrect number of bytes received tM TH8 User Manual Rev A1 0 7MH 018 A10 123 tM TH8 3 6 8 Sub function 37 0x25 Read channel enabled disabled status This sub function code is used to read the enabled disabled status of each channel in a module Request 00 Address 1 Byte 1 to 247 0l Function code 1 Byte 10x46 02 Sub function code 1 Byte
10. Response string 01200600 CR 1 Sum of the string PEOP TL a2 4 07 4 06 0 0 21h 30h 3 1h 32h 30h 30h 36h 30h 30h 1AAh 2 Therefore the checksum is AAh and so CHKSUM AA 3 The response string with the checksum 01200600AA CR Note All characters should be in upper case 30 tM TH8 User Manual Rev A1 0 7MH 018 A10 General Command Sets Command Response Description ection AANNTTCCFFIAA Sets the module configuration 2A AA gt Data Reads the analog inputs of all channels 2 2 Reads the analog input of a specified 23 channel AAO IAA Performs span calibration 2 4 AAI IAA Performs zero calibration 2 5 AA2 AANNTTCCFF Reads the module configuration 2 6 AAS AAS Reads the module reset status 2T AASVV IAA Enables Disables a channel 2 8 AA6 IAAVV Reads the channel enabled disabled status 2 9 HAAN gt Data AA7CiRrr IAA Sets a single channel range configuration 2 10 2 11 Reads a single channel range SAA8Ci AACiRrr configuration AAB AANN Reads the channel diagnostic status 212 AAF 1AA Data Reads the firmware version 2 13 AAI AAS Reads the INIT status 2 14 AAM AA Data Reads the module name 215 AAP AASC Reads the communication protocol 2 16 AAPN IAA Sets the communication protocol AASI IAA Reloads the default calibration parameters 2 18 AAD IAAT Reads the temperature scaling 2 19 Sets the temperature scaling to either C or F 2 20 AAEV IAA Enables Disables calibration PAI AAI
11. 01 Command 022 Response 02230602 Reads the configuration of module 02 Related Commands Section 2 1 7 AANNTTCCFF Related Topics Section 1 10 Configuration Tables tM TH8 User Manual Rev A1 0 7MH 018 A10 45 tM TH8 2 7 AA5 Description Reads the reset status of a module Syntax AA5 CHKSUM CR Delimiter character AA Address of the module to be read 00 to FF 5 Command to read the module reset status Response Valid Command AAS CHKSUM CR Invalid Command 7AA CHKSUM CR Delimiter character for a valid command Delimiter character for an invalid command AA Address of the responding module 00 to FF S Reset status of the module 1 This is the first time the command has been sent since the module was powered on 0 This is not the first time the command has been sent since the module was powered on which denotes that there has been no module reset since the last AA5 command was sent There will be no response if the command syntax is incorrect there is a communication error or there is no module with the specified address 46 tM TH8 User Manual Rev A1 0 7MH 018 A10 tM TH8 Examples Command 015 Response 011 Reads the reset status of module 01 The response shows that it is the first time the AA5 command has been sent since the module was powered on Command 015 Response 010 Reads the reset status of module 01 The response shows that there has been no module
12. 0x25 Response 00 Address 1 Byte 1 to 247 01 Function code 1 Byte 0x46 02 Sub function code 1 Byte 0x25 03 Enabled disabled 1 Byte 0x00 OxFF enabled disabled status status of each channel where bit 0 corresponds to channel 0 bit 1 corresponds to channel 1 etc When the bit is 1 it denotes that the channel is enabled and 0 denotes that the channel is disabled Error Response 00 Address 1 Byte 1 to 247 01 Function code 1 Byte OxC6 02 Exception code 1 Byte 03 incorrect number of bytes received 124 tM TH8 User Manual Rev A1 0 7MH 018 A10 tM TH8 3 6 9 Sub function 38 0x26 Set channel enable disable This sub function code is used to specify the channels to be enabled in a module Request 00 Address 1 Byte 1 to 247 01 Function code 1 Byte 0x46 02 Sub function code 1 Byte 0x26 03 Enable disable 1 Byte 0x00 OxFF enable disable setting setting of each channel where bit 0 corresponds to channel 0 bit 1 corresponds to channel 1 etc When the bit is 1 it denotes that the channel is enabled and 0 denotes that the channel is disabled Response 00 Address 1 Byte 1 to 247 01 Function code 1 Byte 10x46 02 Sub function code 1 Byte 0x26 03 Enable disable l Byte 0 OK setting others error Error Response 00 Address 1 Byte 1 to 247 01 Function code 1 Byte OxC6 02 Exception code l Byte 03 enable disable sett
13. 67 tM TH8 2 19 AAD Description Reads the temperature scale information of a module Syntax AAD CHKSUM CR Delimiter character AA Address of the module to be read 00 to FF D Command to read the temperature scale Response Valid Command AAT CHKSUM CR Invalid Command AA CHKSUM CR Delimiter character for a valid command Delimiter character for an invalid command AA Address of the responding module 00 to FF T Temperature scale 0 the temperature scale is Celsius 1 the temperature scale is Fahrenheit There will be no response if the command syntax is incorrect there is a communication error or there is no module with the specified address 68 tM TH8 User Manual Rev A1 0 7MH 018 A10 tM TH8 Examples Command 01D Response 010 Reads the temperature scale of module 01 and returns Celsius Command 02D Response 021 Reads the temperature scale of module 02 and returns Fahrenheit Related Commands Section 2 20 AADT Notes The default temperature scale is Celsius tM TH8 User Manual Rev A1 0 7MH 018 A10 69 tM TH8 2 20 AADT Description Sets the temperature scale of a module to Celsius or Fahrenheit Syntax AADT CHKSUM CR Delimiter character AA Address of the module to be set 00 to FF D Command to set the temperature scale T C set the temperature scale to Celsius F set the temperature scale to Fahrenheit Response Valid Command AA CHKSUM
14. Data CHKSUM CR Invalid command 4A CHKSUM CR Delimiter character for a valid command Delimiter character for an invalid command or invalid type code AA Address of the responding module 00 to FF Data Two hexadecimal digits to represent the temperature offset Itis 01 for 0 1 02 for 0 2 FF for 0 1 FE for 0 2 etc There will be no response if the command syntax is incorrect there is a communication error or there is no module with the specified address tM TH8 User Manual Rev A1 0 7MH 018 A10 87 tM TH8 Examples Command 01A3C2 Response O10A Reads the temperature offset of channel 2 and the module returns a value of 1 0 Command 01A3C5 Response 01F0 Reads the temperature offset of channel 5 and the module returns a value of 1 6 Related Commands Section 2 27 AAA2CiToo 88 tM TH8 User Manual Rev A1 0 7MH 018 A10 tM TH8 2 29 AAAGCIRrr Description Sets the resistance offset of a channel Syntax AAA6CiRrr CHKSUM CR Delimiter character AA Address of the module to be read 00 to FF A6 Command to set the resistance offset Ci 1 specify the input channel to be set 0 7 Rrr rr represents the resistance offset in 0 1 ohms 0 0 ohms 25 5 ohms Itis in hexadecimal format and 01 for 0 1 02 for 0 2 FF for 25 5 etc Response Valid command AA CHKSUM CR Invalid command AA CHKSUM CR Delimiter character for a valid command Delimiter character for
15. IAA Soft INIT 222 AAO Name IAA Sets the module name 2 23 AARD IAAVV Reads the response delay time 2 24 AARDVV IAA Sets the response delay time 2 25 AATnn IAA Sets the soft INIT timeout 2 26 AADT IAA tM TH8 User Manual Rev A1 0 7MH 018 A10 31 User defined Thermistor Type Setting Command Sets AAA2CiToo IAA Sets the temperature offset of a 2 27 channel AAA3Ci A Aoo Reads the temperature offset of a channel AAA6CiRir IAA Sets the resistance offset of a channel AAATCi A Arr Reads the resistance offset of a channel AAGxTtt AA data Reads the Steinhart coefficient lof a user defined type Reads the temperature AARTTttR data AA data corresponding to the resistance lof a user defined type AASxTttC data IAA Sets the Steinhart coefficient of a user defined type Host Watchdog Command Sets re WNoResponse a SC dYCO FAA AA Resets the host watehdog status 236 I AAETT Reads the host watchdog 237 timeout settings AA3ETT Sets the host watchdog timeout settings 32 tM TH8 User Manual Rev A1 0 7MH 018 A10 tM TH8 2 1 AANNTTCCFF Description Sets the configuration of an analog input module Syntax AANNTTCCFF CHKSUM CR Delimiter character AA Address of the module to be configured in hexadecimal format 00 to FF NN New address of the module in hexadecimal format 00 to FF TT New type code see Section 1 10 for details Not used by the tM TH8 For the tM TH8 use the AA7CiRrr co
16. T A B nR C nR p where Ry is the resistance in ohms at the temperature T in Kelvins K C 273 15 This is called the Steinhart Hart equation Thermistors typically work over a relatively small temperature range of 60 C to 300 C They are less stable than RTDs However they exhibita large change in resistance proportional to a small change in temperature than RTDs and a much higher nominal resistance They are less sensitive to lead resistance noise effects and can be transmitted over a large distance No compensation for ambient temperature is needed They are one of the most accurate types of temperature sensors tM TH8 User Manual Rev A1 0 7MH 018 A10 139 A 6 Resistance Measurement The tM TH8 modules can be used for resistance measurement To measure the resistance connect the resistor using thermistor connection as shown in Section 1 6 and set the data format to ohms To set the data format send the Z7 AANNTTCCFEF command to the module see Section 2 1 for details or use the DCON utility refer to Chapter 2 of the Getting Started For I 7000 Series Modules manual that can be downloaded from the ICP DAS website http www icpdas com The maximum resistance that can be measured by tM TH8 is 204800 ohms 140 tM TH8 User Manual Rev Al 0 7MH 018 A10
17. Tables Baud Rate Setting CC 7 6 5 4 3 2 1 0 Data Baud Key Description Baud Baud Rate 03 1200 04 2400 05 4800 06 9600 07 19200 08 38400 09 57600 OA 115200 Data Data Format 0 eight data bits no parity and one stop bit 1 eight data bits no parity and two stop bit 2 eight data bits even parity and one stop bit 3 eight data bits odd parity and one stop bit 16 tM TH8 User Manual Rev A1 0 7MH 018 A10 Temperature Sensor Type Setting TT Type Code Temperature Sensor Type Temperature Range 60 PreCon Type III 10K 25 C 30 F 240 F 61 Fenwell Type U 2K 25 C 50 C 150 C 62 Fenwell Type U 2K 25 C 0 C 150 C 63 YSI L Mix 100 25 C 80 C 100 C 64 YSI L Mix 300 25 C 80 C 100 C 65 YSI L Mix 1000 25 C 70 C 100 C 66 YSIB Mix 2252 25 C 50 C 150 C 67 YSIB Mix 3000 25 C 40 C 150 C 68 YSIB Mix 5000 25 C 40 C 150 C 69 YSIB Mix 6000 25 C 30 C 150 C 6A YSIB Mix 10000 25 C 30 C 150 C 6B YSI H Mix 10000 25 C 30 C 150 C 6C YSI H Mix 30000 25 C 10 C 200 C 70 User defined 50 C 150 C 71 User defined 50 C 150 C 712 User defined 50 C 150 C 73 User defined 50 C 150 C 74 User defined 50 C 150 C 75 User defined 50 C 150 C 76 User defined 50 C
18. User Manual Rev A1 0 7MH 018 A10 tM TH8 Examples Command 01P1 Response 01 Sets the communication protocol of module 01 to Modbus RTU and returns an invalid response because the module is not in INIT mode Command 01P1 Response 01 Sets the communication protocol of module 01 to Modbus RTU and returns a valid response Related Commands Section 2 16 AAP Related Topics Section A 1 INIT Mode tM TH8 User Manual Rev A1 0 7MH 018 A10 65 tM TH8 2 18 AAS1 Description Reloads the factory default calibration parameters including the internal calibration parameters Syntax AASI CHKSUM CR Delimiter character AA Address of the module to have the default parameters reloaded 00 to FF Sl Command to reload the factory default calibration parameters Response Valid command AA CHKSUM CR Invalid command 4A CHKSUM CR Delimiter character for a valid command Delimiter character for an invalid command AA Address of the responding module 00 to FF There will be no response if the command syntax is incorrect there is a communication error or there is no module with the specified address Examples Command 01S1 Response 01 Sends the command to reload the factory default calibration parameters for module O1 and returns a valid response 66 tM TH8 User Manual Rev A1 0 7MH 018 A10 tM TH8 Related Topics Section 1 9 Calibration tM TH8 User Manual Rev A1 0 7MH 018 A10
19. address valid range 1 247 R W 40486 Bits 5 0 R W Baud rate 0x03 OxOA Code 0x03 0x04 0x05 0x06 Baud 1200 12400 14800 19600 Code 0x07 0x08 0x09 Ox0A Baud 19200 38400 57600 115200 Bits 7 6 00 no parity 1 stop bit 01 no parity 2 stop bits 10 even parity 1 stop bit 11 odd parity 1 stop bit 40488 Modbus response delay time in ms R W valid range 0 30 40489 Host watchdog timeout value 0 255 R W in 0 1s 40490 Channel enable disable R W 40492 Host watchdog timeout count write O0 R W to clear 40769 Steinhart Coefficient A of type code R W 40784 70to 77 40801 Steinhart Coefficient B of type code R W 40816 70to 77 40833 Steinhart Coefficient C of type code R W 40848 70to 77 tM TH8 User Manual Rev A1 0 7MH 018 A10 129 3 8 Modbus Engineering Data Format Table Type Code Thermistor Type F S F S 60 PreCon Type HI 10K 3000 24000 25 6 61 Fenwell Type U 2K 5000 15000 25 C 62 Fenwell Type U 2K 0 15000 25C 63 YSI L Mix 100 25 C 8000 10000 64 YSI L Mix 300 25 C 8000 10000 65 YSI L Mix 1000 25 C 7000 10000 66 YSI B Mix 2252 25 C 5000 15000 67 YSI B Mix 3000 25 C 4000 15000 68 YSI B Mix 5000 25 C 4000 15000 69 YSI B Mix 6000 25 C 3000 15000 6A YSI B Mix 10000 25 C 3000 15000 6B YSI H Mix 10000 25 C 3000 15000 6C YSI H Mix 30000 25 C 1000 20000
20. character AA Address of the module to be read 00 to FF M Command to read the module name Response Valid command AA Data CHKSUM CR Invalid command AA CHKSUM CR Delimiter character for a valid command Delimiter character for an invalid command AA Address of the responding module 00 to FF Name Name string of the module There will be no response if the command syntax is incorrect there is a communication error or there is no module with the specified address Examples Command 01M Response 01tTH8 Reads the module name of module 01 and returns the name tTH8 Related Commands Section 2 23 AAO Name tM TH8 User Manual Rev A1 0 7MH 018 A10 61 tM TH8 2 16 AAP Description Reads the communication protocol information Syntax S AAP CHKSUM CR Delimiter character AA Address of the module to be read 00 to FF P Command to read the communication protocol Response Valid Response AASC CHKSUM CR Invalid Response AA CHKSUM CR Delimiter character for a valid response Delimiter character for an invalid response AA Address of the responding module 00 to FF S The protocols supported by the module 0 only DCON protocol is supported 3 The DCON Modbus RTU and Modbus ASCII protocols are supported C Current protocol saved in EEPROM that will be used at the next power on reset 0 the protocol set in EEPROM is DCON 1 the protocol set in EEPROM is Modbus RTU 3 th
21. data format For the tM TH8 data from disabled channels is filled with space characters AA Address of the responding module 00 to FF There will be no response if the command syntax is incorrect there is a communication error or there is no module with the specified address 36 tM TH8 User Manual Rev A1 0 7MH 018 A10 tM TH8 Examples Command 01 Response gt 026 35 Reads module 01 and receives the data in engineering format Command 02 Response gt 4C53 Reads module 02 and receives the data in hexadecimal format Command 03 Response gt 9999 9 Reads module 03 and the data is under range Command 04 Response gt 025 12 054 12 150 12 Reads module 04 an I 7033 and receives the data from 3 channels Related Commands Section 2 1 Z7 AANNTTCCFF Section 2 6 AA2 Related Topics Section 1 10 Configuration Tables tM TH8 User Manual Rev A1 0 7MH 018 A10 37 tM TH8 2 3 HAAN Description Reads the analog input of channel N Syntax AAN CHKSUM CR Delimiter character AA Address of the module to be read 00 to FF N The channel to be read zero based Response Valid Command gt Data CHKSUM CR Invalid Command AA CHKSUM CR gt Delimiter character for a valid command Delimiter character for an invalid command An invalid command is returned if the specified channel is incorrect Data Analog input data of the specified channel see Section 1 10 for the data format For th
22. for the tM TH8 the module is in INIT mode see Section A 1 for details and the communication settings are as follows Address 00 Baud Rate 9600 bps No checksum Protocol DCON oe a If communication with the module is not possible set the module to the INIT mode and use the above settings to communicate with the module To read the current settings send the commands AA2 see Section 2 6 and SAAP see Section 2 16 To set new settings send the commands 7AANNTTCCEFF see Section 2 1 and SAAPN see Section 2 17 The new communication settings will be effective after the next power on reset Run lt gt Init E mi1 tM TH8 User Manual Rev A1 0 7MH 018 A10 25 1 13 Mounting 1 13 1 Din Rail Mounting There are three new DIN rail models available Each is made of stainless steel which is stronger than those made of aluminum There is a screw at one end and a ring terminal is included so that it can be easily connected to the earth ground The three new DIN rail models are as follows Part number Max number of modules Dimensions DRS 360 6 360mm x 35mm to earth ground 26 tM TH8 User Manual Rev A1 0 7MH 018 A10 Part number Max number of modules Dimensions DRS 240 4 240mm x 35mm to earth ground Part number Max number of modules Dimensions DRS 125 2 125mm x 35mm to earth ground N
23. 150 C 71 User defined 50 C 150 C Note Please refer to Section 1 11 for details of user defined types tM TH8 User Manual Rev A1 0 7MH 018 A10 17 Data Format Setting FF 7 6 5 4 3 2 1 RS CS RS DF Key Description DF Data format 00 Engineering unit 01 of FSR full scale range 10 2 s complement hexadecimal 11 Ohms CS Checksum setting 0 Disabled 1 Enabled RS Reserved Note The reserved bits should be zero tM TH8 User Manual Rev A1 0 7MH 018 A10 Thermistor Type and Data Format Table Type Code Thermistor Data Format F S F S Type PreCon Type Engineering unit 240 00 030 00 60 Il of FSR 100 00 012 50 10K 25 C 2 s comp HEX 7FFF F000 30 240 F Ohms 000539 4 173600 0 Engineering unit 150 00 050 00 oe asec PofFSR_ 100 00 033 33 50 150 C 2 s comp HEX 7FFF D556 Ohms 000037 2 134020 0 Engineering unit 150 00 000 00 6 ae asec ofFSR 100 00 000 00 0 150 C 2 s comp HEX 7FFF 0000 Ohms 000037 2 006530 0 Engineering unit 100 00 080 00 63 pe sre __20fFSR__ 100 00 080 00 80 100 C 2 s comp HEX 7FFF 999A Ohms 000014 3 014470 0 Engineering unit 100 00 080 00 a ape dare __2 of FSR__ 100 00 080 00 80
24. 16 tM TH8 User Manual Rev A1 0 7MH 018 A10 tM TH8 3 6 3 Sub function 05 0x05 Read communication settings This sub function code is used to read the communication protocol settings of a module Request 00 Address 1 Byte 1 to 247 Ol Function code 1 Byte 0x46 02 Sub function code 1 Byte 0x05 03 Reserved 1 Byte 0x00 Response 00 Address 1 Byte 1 to 247 01 Function code 1 Byte 0x46 02 Sub function code 1 Byte 0x05 03 Protocol 1 Byte 0x00 Modbus RTU supported 0x03 Modbus RTU amp ASCII 04 Baud Rate 1 Byte Baud Rate code see Section 1 10 for details 05 Reserved 1 Byte 0x00 06 Data format 1 Byte 0x00 no parity 1 stop bit 0x01 no parity 2 stop bits 0x02 even parity 1 stop bit 0x03 odd parity 1 stop bit 07 Reserved 1 Byte 0x00 08 Mode 1 Byte 0x00 DCON protocol 0x01 Modbus RTU protocol 0x03 Modbus ASCII protocol 09 10 Reserved 2 Bytes 0x00 0x00 Note This information is the data saved in the EEPROM and will be used for the next power on reset It is not the currently used settings tM TH8 User Manual Rev A1 0 7MH 018 A10 117 Error Response 00 Address 1 Byte 1 to 247 01 Function code 1 Byte OxC6 02 Exception code l Byte 03 reserved byte should be filled with zero incorrect number of bytes received 118 tM TH8 User Manual Rev A1 0 7MH 018 A10 tM T
25. 70 77 User defined of FSR 100 00 033 33 50 150 C 2 s comp HEX 7FFF D556 Ohms 000000 0 000000 0 Note 1 For user defined types if the resistance is larger than 204800 ohms then it is treated as under range Refer to Section 1 11 for more information regarding 2a user defined types 20 tM TH8 User Manual Rev A1 0 7MH 018 A10 Thermistor Over Range Under Range Reading for the tM TH8 with DCON protocol Over Range Under Range Engineering Unit 9999 9 9999 9 of FSR 999 99 999 99 2 s Complement HEX 7FFF 8000 Thermistor Over Range Under Range Reading for the tM TH8 with Modbus protocol Over Range Under Range Engineering Unit 32767 32768 2 s Complement HEX 7FFF 8000 tM TH8 User Manual Rev A1 0 7MH 018 A10 21 1 11 User defined Types For a typical thermistor the relationship between resistance and temperature can be expressed by the Steinhart Hart equation 1 T A B InRy C nR where Ry is the resistance in ohms at temperature T in degrees Kelvin K C 273 15 The values of A B and C are called Steinhart Coefficients The error of the equation is less than 0 01 C in a 100 C span The tM TH8 supports user defined types by specifying the Steinhart coefficients using the AASxTttC data command see Section 2 33 The data sent is a 32 bit hexadecimal value in IEEE 754 standard format Bits De
26. Byte 03 reserved bits should be filled with zero incorrect number of bytes received tM TH8 User Manual Rev A1 0 7MH 018 A10 127 3 Modbus Address Mappings Address Description Attribute 00257 Protocol 0 DCON 1 Modbus R W 00258 Modbus protocol 0 RTU 1 ASCH 00261 1 enable 0 disable host watchdog R W 00267 Temperature scale 0 Fahrenheit 1 R W Celsius 00269 Modbus data format O hex 1 R W engineering 00270 Host watch dog timeout status write 1 R W to clear host watch dog timeout status 00272 Write 1 to load factory calibration W parameters 00273 Reset status 1 first read after R powered on 0 not the first read after powered on 10129 Over under range status of channelO R 10136 lto7 00129 00136 30001 Analog input value of channel O to7 R 30008 40001 40008 40257 Type code of channel 0 to 7 R W 40264 40385 Resistance offset of channel 0 to 7 in R W 40392 0 1 ohms valid range 0 255 40449 Temperature offset of channel O to 7 R W 40456 lin 0 1 C F valid range 128 127 128 tM TH8 User Manual Rev A1 0 7MH 018 A10 Address Description Attribute 40481 Firmware version low word R 40482 Firmware version high word R 40483 Module name low word R 40484 Module name high word R 40485 Module
27. Command 011 Response 01 Resets the host watchdog timeout status of module 01 and returns a valid response Command 010 Response 0100 Reads the host watchdog status of module 01 and shows that no host watchdog timeout has occurred Related Commands Section 2 34 Section 2 35 AAO Section 2 37 AA2 Section 2 38 AA3EVV Related Topics Section A 2 Dual Watchdog Operation tM TH8 User Manual Rev A1 0 7MH 018 A10 103 tM TH8 2 37 AA2 Description Reads the host watchdog timeout value of a module Syntax AA2 CHKSUM CR Delimiter character AA Address of the module to be read 00 to FF 2 Command to read the host watchdog timeout value Response Valid command AAEVV CHKSUM CR Invalid command 4A CHKSUM CR Delimiter character for a valid command Delimiter character for an invalid command AA Address of the responding module 00 to FF E 1 the host watchdog is enabled 0 the host watchdog is disabled VV Two hexadecimal digits to represent the timeout value in tenths of a second for example 01 denotes 0 1 seconds and FF denotes 25 5 seconds There will be no response if the command syntax is incorrect there is a communication error or there is no module with the specified address 104 tM TH8 User Manual Rev A1 0 7MH 018 A10 tM TH8 Examples Command 012 Response 01 1 FF Reads the host watchdog timeout value of module 01 and returns FF which denotes that the host watchd
28. DCON Protocol All communication with I 7000 modules consists of commands generated by the host and responses transmitted by the I 7000 modules Each module has a unique ID number that is used for addressing purposes and is stored in non volatile memory The ID is 01 by default and can be changed using a user command All commands to the modules contain the ID address meaning that only the addressed module will respond The only exception to this is command Section 2 34 which are sent to all modules but in both of these cases the modules do not reply to the command Command Format Leading Module Character Address _COMMand CHKSUM CR Response Format Leading Module Character Address Data CHKSUM CR CHKSUM A 2 character checksum which is present when the checksum setting is enabled See Sections 1 10 Data Format Setting and 2 1 for details CR End of command character carriage return 0x0D tM TH8 User Manual Rev A1 0 7MH 018 A10 29 Checksum Calculation 1 Calculate the ASCII code sum of all the characters in the command response string except for the carriage return character CR 2 The checksum is equal to the sum masked by OFFh Example Command string 012 CR 1 Sum of the string 0 71 72 24h 30h 3 1h 32h B7h 2 Therefore the checksum is B7h and so CHKSUM B7 3 The command string with the checksum 012B7 CR
29. Delimiter character AA Address of the module to be read 00 to FF 8 Command to read the type code of a channel Ci Specifies which channel to access for the type code information 1 0 7 Response Valid command AACiRrr CHKSUM CR Invalid command 4A CHKSUM CR Delimiter character for a valid command Delimiter character for an invalid command or invalid channel AA Address of the responding module 00 to FF Ci Specifies which input channel the type code information relates to Rrr Represents the type code of the specified input channel Refer to the Temperature Sensor Type Setting table in Section 1 10 There will be no response if the command syntax is incorrect there is a communication error or there is no module with the specified address 54 tM TH8 User Manual Rev A1 0 7MH 018 A10 tM TH8 Examples Command 018C0 Response 01COR70 Reads the input range of channel 0 of module 01 and returns 70 Related Commands Section 2 10 AA7CiRrr Related Topics Section 1 10 Configuration Tables tM TH8 User Manual Rev A1 0 7MH 018 A10 55 tM TH8 2 12 AAB Description Diagnoses the analog inputs for over range under range and wire opening conditions Syntax AAB CHKSUM CR Delimiter character AA Address of the module to be diagnosed 00 to FF B Command to diagnose the analog inputs Response Valid command AANN CHKSUM CR Invalid command AA CHKSUM CR Delimite
30. E E E E ehion oO emer 119 tM TH8 User Manual Rev A1 0 7MH 018 A10 3 3 6 5 Sub function 07 0x07 Read type code 121 3 6 6 Sub function 08 0x08 Set type code 122 3 6 7 Sub function 32 0x20 Read firmware version 123 3 6 8 Sub function 37 0x25 Read channel enabled disabled status c ccc ccccccccccccececececeseceseeeeeeess 124 3 6 9 Sub function 38 0x26 Set channel enable disable Re Ee ree ae eae eR Rear E me nee 125 3 6 10 Sub function 41 0x29 Read miscellaneous SENES een a a EE cadens E sae dematens 126 3 6 11 Sub function 42 0x2A Write miscellaneous SAE E Matin oleae oat ite Mas 127 3 7 Modbus Address Mappings ccccessseeeeceeeesenteeeeees 128 3 8 Modbus Engineering Data Format Table 0 130 As SP OWUDIE SIO OUTS meceni a e E A IRR need ta Mattie 131 4 1 Communicating with the module eee eeeeeeeee 132 42 NGACING Datas reei tina E E E E SEE EE 133 PNG EAP CMI a ae ea E R tanec 134 ASLINI MO e eee eaa at ee eae AE 134 A 2 Dual Watchdog Operation ccsesscccccceceeeeeeeseeeenes 136 A 3 Fram Grond osen enrere neire aiir iiie nrs 137 POA Reset Statis ixtotecias screened taeeCaak ional acu e e eats 138 PA Sal Meta SUR 320i ccaseattlc adda hoe a att ta asda bees 139 A 6 Resistance Measurement cccccceeseseseeeseseeeeeseeeeeees 140 4 tM TH8 User Manual Rev A1 0 7MH 018 A10 1 Introduction The tM series is a family of network data acquis
31. H8 3 6 4 Sub function 06 0x06 Set communication settings This sub function code is used to set the communication protocol of a module Request 00 Address 1 Byte 1 to 247 01 Function code 1 Byte 0x46 02 Sub function code 1 Byte 0x06 03 Reserved 1 Byte 0x00 04 Baud Rate 1 Byte Baud rate code see Section 1 10 for details 05 Reserved 1 Byte 0x00 06 Data format 1 Byte 0x00 no parity 1 stop bit 0x01 no parity 2 stop bits 0x02 even parity 1 stop bit 0x03 odd parity 1 stop bit 07 Reserved 1 Byte 0x00 08 Mode 1 Byte 0x00 DCON protocol 0x01 Modbus RTU protocol 0x03 Modbus ASCII protocol 09 10 Reserved 2 Bytes 0x00 0x00 Response 00 Address 1 Byte 1 to 247 01 Function code 1 Byte 0x46 02 Sub function code 1 Byte 0x06 03 Reserved 1 Byte 0x00 04 Baud Rate 1 Byte 0x00 OK others error 05 Reserved 1 Byte 10x00 0x00 0x00 06 Data format 1 Byte 0x00 OK others error 07 Reserved 1 Byte 0x00 08 Mode 1 Byte 0x00 OK others error 09 10 Reserved 2 Bytes 0x00 0x00 tM TH8 User Manual Rev A1 0 7MH 018 A10 119 Note The new Baud Rate and protocol will be effective after the next power on reset Error Response 00 Address 1 Byte 1 to 247 01 Function code 1 Byte OxC6 02 Exception code l Byte 03 Baud Rate or mode out of range reserved bytes should be fil
32. M TH8 3 6 1 Sub function 00 0x00 Read module name This sub function code is used to read the name of a module Request 00 Address 1 Byte 1 to 247 01 Function code 1 Byte 0x46 02 Sub function code 1 Byte 0x00 Response 00 Address 1 Byte 1 to 247 01 Function code 1 Byte 0x46 02 Sub function code 1 Byte 0x00 03 06 Module name 4 Bytes 0x07 0x00 0x80 0x03 for tM TH8 Error Response 00 Address 1 Byte 1 to 247 01 Function code 1 Byte OxC6 02 Exception code l Byte 03 incorrect number of bytes received tM TH8 User Manual Rev A1 0 7MH 018 A10 115 tM TH8 3 6 2 Sub function 04 0x04 Set module address This sub function code is used to set the address of a module Request 00 Address 1 Byte 1 to 247 0l Function code 1 Byte 10x46 02 Sub function code 1 Byte 0x04 03 New address 1 Byte 1 to 247 04 06 Reserved 3 Bytes 0x00 0x00 0x00 Response 00 Address 1 Byte 1 to 247 0l Function code 1 Byte 10x46 02 Sub function code 1 Byte 0x04 03 Set address result 1 Byte 0 OK others error 04 06 Reserved 3 Bytes 0x00 0x00 0x00 Error Response 00 Address 1 Byte 1 to 247 01 Function code 1 Byte OxC6 02 Exception code l Byte 03 new address out of range reserved bytes should be filled with zero incorrect number of bytes received 1
33. N telus ean ETO 72 2 22 AAI Soft INIT command seeeeeeesesecrereesesesssrrcern 74 2723 ARO CUNGING J etree ts avueien lel a 76 De DAES RID spite eee es et leita aes eke as ee cece CL Os 78 229S PTD VW gene en R E A ahs ba macs 80 D20 SAATIM ee E O NE 82 22T OANA CIT OOs e a ta ea i A TE EAEN 85 LISOA 4 Oi REPRINT RIT APNE OR A A E EE 87 2 DONOR PAROG IR Tien cisosidsauesl waseasitins sence alee 89 DO OPAC ca gasses chess R EE anaes 91 Pe INO PPC ME o E T E 93 2 32 AARTTttR Data 0 0 cccesessssecececeeeceesesessntnseeeeees 95 DSS AASxTttC data eena enerne 97 Dog T E EEEE E EEE 99 PIIA AO a A a a a EEE PR aE OCT ER 100 DOE Meese tte T A T ia ts el 102 DB IND 2 cesses ca E E E EE ON 104 DEB OARS Viviane la late test tal tlle oe 106 3 Modbus RK PUCProtocol iu 5setss ois de isteseatsseicsca alterna hen coli 108 3 1 O1 0x01 Read Coil Registers ee eeesesseteeeeees 109 3 2 02 0x02 Read Input Status oe eeecceeserseteeeeees 110 3 3 04 0x04 Read Input Channels ee eeeceserteeeees 111 3 4 05 0x05 Write Single Coil Register eee eeees 112 3 5 15 OxOF Write Multiple Coil Registers 113 3 6 70 0x46 Read Write Module Settings cc cece 114 3 6 1 Sub function 00 0x00 Read module name 115 3 6 2 Sub function 04 0x04 Set module address 116 3 6 3 Sub function 05 0x05 Read communication SEINES onee e a a ante aat 117 3 6 4 Sub function 06 0x06 Set communication settings E E E
34. User Manual Rev A1 0 7MH 018 A10 1 7 Quick Start Please refer to the Quick Start Guide for tM TH8 tM TH8 User Manual Rev A1 0 7MH 018 A10 1 8 Default Settings Default settings for the tM TH8 are as follows o o o Protocol Modbus RTU Module Address 01 Thermistor Type Type 60 PreCon Type III 30 F to 240 F Baud Rate 9600 bps Temperature Scale Celsius the tM TH8 also supports Fahrenheit scale tM TH8 User Manual Rev A1 0 7MH 018 A10 1 9 Calibration Warning It is not recommended that calibration be performed until the process is fully understood The calibration procedure is as follows 1 J 6 F Warm up the module for at least 30 minutes 2 Enable calibration Refer to Section 2 21 for details 3 4 Send the zero calibration command Refer to Section Connect the zero calibration resistor 2 5 for details Connect the span calibration resistor Send the span calibration command Refer to Section 2 4 for details Repeat steps 2 to 6 three times Notes 1 2 Calibration resistors are shown on the next page The tM TH8 modules must be switched to the DCON protocol mode before calibrating Refer to Sections 1 12 1 and 3 6 4 for details of the switching protocol Calibration resistor used by the tM TH8 Zero Calibration Resistor Span Calibration Resistor 0 Ohms 204800 Ohms tM TH8 User Manual Rev A1 0 7MH 018 A10 15 1 10 Configuration
35. YSI H Mix 10000 Ohms at 25 C 12 YSI H Mix 30000 Ohms at 25 C 13 User defined 6 tM TH8 User Manual Rev A1 0 7MH 018 A10 1 1 More Information o For details of INIT mode operation please refer to Section A 1 INIT Mode o For details of module watchdog and host watchdog please refer to Section A 2 Dual Watchdog Operation o For details of ESD protection and grounding please refer to Section A 3 Frame Ground o There is a way to check whether the module is reset please refer to Section A 4 Reset Status for details o A brief introduction to thermistor is described in Section A 5 Thermistor o The module tM TH8 can be used in resistance measurement Please refer to Section A 6 Resistance Measurement for details tM TH8 User Manual Rev A1 0 7MH 018 A10 1 2 Terminal Assignment CPon tM THS Channel Thermistor Input i ry oe A a Faa Mot A et al K 8 tM TH8 User Manual Rev Al 0 7MH 018 A10 1 3 Specifications tM TH8 Analog Input Input Channels 8 Input Type Thermistor Thermistor Type PreCon Type III Fenwell Type U YSI L 100 YSI L 300 YSI L 1000 YSI B 2252 YSI B 3000 YSI B 5000 YSI B 6000 YSI B 10000 YSI H 10000 YSI H 30000 User defined Temperature Scale Celsius Fahrenheit Sampling Rate 8 samples sec total Bandwidth 5 24 Hz Accuracy 0 5 Zero Drift 20 u VIC Span Drift 25 ppm C Ope
36. address 72 tM TH8 User Manual Rev A1 0 7MH 018 A10 tM TH8 Examples Command 010 Response 01 Sends the command to perform a span calibration on module 01 An invalid response is returned because the enable calibration command has not yet been sent Command O1E1 Response 01 Enables calibration on module 01 and returns a valid response Command 010 Response 01 Sends the command to perform a span calibration on module 01 and returns a valid response Related Commands Section 2 4 AAO Section 2 5 AA1 Related Topics Section 1 9 Calibration tM TH8 User Manual Rev A1 0 7MH 018 A10 73 tM TH8 2 22 AAI Soft INIT command Description The Soft INIT command is used to enable modification of the Baud Rate and checksum settings using software only Syntax AAI CHKSUM CR Delimiter character AA Address of the module to be set 00 to FF I Command to set the Soft INIT Response Valid command AA CHKSUM CR Invalid command 4A CHKSUM CR Delimiter character for a valid command 7 Delimiter character for an invalid command AA Address of the responding module 00 to FF There will be no response if the command syntax is incorrect there is a communication error or there is no module with the specified address Examples Command O1I Response 01 Sets the soft INIT of module 01 and returns a valid response Related Commands Section 2 1 7 AANNTTCCEFF Section 2 26 AAT
37. an invalid command or invalid type code AA Address of the responding module 00 to FF There will be no response if the command syntax is incorrect there is a communication error or there is no module with the specified address tM TH8 User Manual Rev A1 0 7MH 018 A10 89 tM TH8 Examples Command 01A6C2T0A Response 01 Sets the resistance offset of channel 2 to 1 0 and the module returns a valid response Command 01A6C5TFO Response 01 Sets the resistance offset of channel 5 to 24 0 and the module returns a valid response Related Commands Section 2 30 AAA7Ci 90 tM TH8 User Manual Rev A1 0 7MH 018 A10 tM TH8 2 30 AAA7Ci Description Reads the resistance offset of a channel Syntax AAA7Ci CHKSUM CR Delimiter character AA Address of the module to be read 00 to FF A7 Command to read the resistance offset Ci 1 specify the input channel to be set 0 7 Response Valid command AA Data CHKSUM CR Invalid command 4A CHKSUM CR Delimiter character for a valid command 2 Delimiter character for an invalid command or invalid type code AA Address of the responding module 00 to FF Data Two hexadecimal digits to represent the resistance offset It is 01 for 0 1 ohms 02 for 0 2 ohms FF for 25 5 ohms FE for 25 4 ohms etc There will be no response if the command syntax is incorrect there is a communication error or there is no module with the specified address
38. d that only the channels to be used are enabled tM TH8 User Manual Rev A1 0 7MH 018 A10 49 tM TH8 2 9 AA6 Description Reads the enabled disabled status of each channel Syntax AA6 CHKSUM CR Delimiter character AA Address of the module to be read 00 to FF 6 Command to read the channel status Response Valid Command AAVV CHKSUM CR Invalid Command 7AA CHKSUM CR Delimiter character for a valid command Delimiter character for an invalid command AA Address of the responding module 00 to FF VV A two digit hexadecimal value where bit 0 corresponds to channel 0 bit 1 corresponds to channel 1 etc When the bit is 1 it denotes that the channel is enabled and O denotes that the channel is disabled There will be no response if the command syntax is incorrect there is a communication error or there is no module with the specified address 50 tM TH8 User Manual Rev A1 0 7MH 018 A10 tM TH8 Examples Command 0153A Response 01 Enables channels 1 3 4 and 5 and disables all other channels of module 01 The module returns a valid response Command 016 Response 013A Reads the channel status of module 01 and returns a response of 3A which denotes that channels 1 3 4 and 5 are enabled and all other channels are disabled Related Commands Section 2 8 AA5VV tM TH8 User Manual Rev A1 0 7MH 018 A10 51 tM TH8 2 10 AA7CiRrr Description Sets the type code of a chan
39. dress of the responding module 00 to FF There will be no response if the command syntax is incorrect there is a communication error or there is no module with the specified address 80 tM TH8 User Manual Rev A1 0 7MH 018 A10 tM TH8 Examples Command 01RD06 Response 01 Sets the response delay time value to 6ms The module returns a valid response Command O1RD Response 0106 Reads the response delay time value of module 01 The module returns 06 which denotes that the response delay time value is 6ms Related Commands Section 2 24 AARD tM TH8 User Manual Rev A1 0 7MH 018 A10 81 tM TH8 2 26 AATnn Description Sets the soft INIT timeout value Syntax AATnn CHKSUM CR Delimiter character AA Address of the module to be set 00 to FF T Command to set the soft INIT timeout nn Two hexadecimal digits representing the timeout value in seconds The maximum timeout value is 60 seconds When changing the Baud Rate or checksum settings without altering the INIT status the AAI and 7 AANNTTCCFEF commands should be sent consecutively and the time interval between the two commands should be less than the soft INIT timeout If the soft INIT timeout is 0 then the Baud Rate and checksum settings cannot be changed using software only The power on reset value of the soft INIT timeout is 0 82 tM TH8 User Manual Rev A1 0 7MH 018 A10 tM TH8 Response Valid command AA CHKSUM CR Invalid co
40. e protocol set in EEPROM is Modbus ASCII There will be no response if the command syntax is incorrect there is a communication error or there is no module with the specified address 62 tM TH8 User Manual Rev A1 0 7MH 018 A10 tM TH8 Examples Command 01P Response 0130 Reads the communication protocol of module 01 and returns a response of 10 meaning that it supports the DCON Modbus RTU and Modbus ASCII protocols and the protocol that will be used at the next power on reset is DCON Related Commands Section 2 17 AAPN tM TH8 User Manual Rev A1 0 7MH 018 A10 63 tM TH8 2 17 AAPN Description Sets the communication protocol Syntax S AAPN CHKSUM CR Delimiter character AA Address of the module to be read 00 to FF P Command to set the communication protocol N 0 DCON protocol 1 Modbus RTU protocol 3 Modbus ASCII protocol Before using this command the slide switch must be in the INIT position for tM TH8 see Section A 1 for details The new protocol is saved in the EEPROM and will be effective after the next power on reset Response Valid Response AA CHKSUM CR Invalid Response AA CHKSUM CR Delimiter character for a valid response Delimiter character for an invalid response AA Address of the responding module 00 to FF There will be no response if the command syntax is incorrect there is a communication error or there is no module with the specified address 64 tM TH8
41. e tM TH8 if the specified channel is disabled then the data field will be filled with space characters AA Address of the responding module 00 to FF There will be no response if the command syntax is incorrect there is a communication error or there is no module with the specified address 38 tM TH8 User Manual Rev A1 0 7MH 018 A10 tM TH8 Examples Command 032 Response gt 025 13 Reads data from channel 2 of module 03 Command 029 Response 02 Reads data from channel 9 of module 02 An error is returned because channel 9 is invalid Related Commands Section 2 1 7 AANNTTCCFF Section 2 6 AA2 Related Topics Section 1 10 Configuration Tables tM TH8 User Manual Rev A1 0 7MH 018 A10 39 tM TH8 2 4 AA0 Description Performs a span calibration Syntax AA0 CHKSUM CR Delimiter character AA Address of the module to be calibrated 00 to FF 0 Command for the span calibration Response Valid Command AA CHKSUM CR Invalid Command AA CHKSUM CR Delimiter character for a valid command Delimiter character for an invalid command An invalid command is returned 1f the specified channel is incorrect AA Address of the responding module 00 to FF There will be no response if the command syntax is incorrect there is a communication error or there is no module with the specified address 40 tM TH8 User Manual Rev A1 0 7MH 018 A10 tM TH8 Examples Command 010 Res
42. ead the response delay time value Response Valid command AAVV CHKSUM CR Invalid command AA CHKSUM CR Delimiter character for a valid command 2 Delimiter character for an invalid command AA Address of the responding module 00 to FF VV Two hexadecimal digits to represent the response delay time value in milli second for example 01 denotes Ims and 1E denotes 30ms The max allowable value is 30 JEh There will be no response if the command syntax is incorrect there is a communication error or there is no module with the specified address 78 tM TH8 User Manual Rev A1 0 7MH 018 A10 tM TH8 Examples Command 01RD Response 0102 Reads the response delay time value of module 01 and returns 02 which denotes that the response delay time value is 2ms Related Commands Section 2 25 AARDVV tM TH8 User Manual Rev A1 0 7MH 018 A10 79 tM TH8 2 25 AARDVV Description Sets the response delay time value of a module Syntax AARDVV CHKSUM CR Delimiter character AA Address of the module to be set 00 to FF RD Command to set the response delay time VV Two hexadecimal digits to represent the response delay time value in milli second for example 01 denotes Ims and 1E denotes 30s The max allowable value is 30 JEh Response Valid command AA CHKSUM CR Invalid command 4A CHKSUM CR Delimiter character for a valid command Delimiter character for an invalid command AA Ad
43. eek 13 1 8 Defa lt Setting Siionin as 14 EIC ALOR AUI OD er ae E E TE 15 1 10 Configuration PADIS gecscus assed ever senasrerweranenmnncawencetecty 16 1 11 User defined Types ss siasicensttuaanchiseaewsnisuesaaiiescesvedynasswnes 22 VI2M THS Not Sisirin e 24 1 12 1 Protocol Switching sseesseseeeesesssssssseseserersessss 24 FAIZ INITM 0de irs T 25 DAS NU OU GINS eea E ETE RE 26 1 13 1 Din Rail Mounting sseeeeeesseseeeeessseeersssssseesssseee 26 LAA Technical Support site node ntin a 28 2 DCON Pr tocol ainiin detainee ae E 29 2d TOP ANNTTCCEF oiio ieii ia e E etter 33 Did i Aee AN NE 36 PS TAAN oa r T LU a des 38 DAO e a E RA 40 ZO DAA sumon n E a OA 42 PAE T T OEE E E E E S E A 44 AA E T ee Lene 46 E DAAN NV ean e EER 48 Di DINING ar aE E A Per salle Datel 50 DV ORS AAG CA RUE eera E E adieu haere iel den dbaccss 52 REISAN GC I urusa ts ne a aT SIRE E ta rt sl 54 SAAD a T E N 56 TASSAR T e E T pomaaaadaecasles 58 2 tM TH8 User Manual Rev A1 0 7MH 018 A10 ASAA oes Specs esse e E ae tied ate eadaa aa seet 59 PMS AINA ish i A E oa dea said T TS 61 Di MOD IAD as Milas heise tates N sos ade daiea wushtdobbudaece Dae dosies 62 DEAT SBAIAE Nvessicsd eetvcedic tesadlonattalbctds E nial adice easton 64 DLA oii SECs od Mace rene RCE RERRCT TER RECS OTTe LTRS RCE T ene a HE RET eT ET 66 DARA ES oS 0 N Denner me a e a E NO Pear 68 DDO PSD pica ehh creel as obras ae tah tel nie atest ets Ba tts 70 ZA PN INTEN etie i E ana
44. fy the accuracy of the user defined type 98 tM TH8 User Manual Rev A1 0 7MH 018 A10 tM TH8 2 34 Description Informs all modules that the host is OK Syntax CHKSUM CR Delimiter character a Host OK command Response No response Examples Command No response Sends a Host OK command to all modules Related Commands Section 2 35 AAO Section 2 36 AA1 Section 2 37 AA2 Section 2 38 AA3EVV Related Topics Section A 2 Dual Watchdog Operation tM TH8 User Manual Rev A1 0 7MH 018 A10 99 tM TH8 2 35 AA0 Description Reads the host watchdog status of a module Syntax AA0 CHKSUM CR Delimiter character AA Address of the module to be read 00 to FF 0 Command to read the module status Response Valid command AASS CHKSUM CR Invalid command AA CHKSUM CR Delimiter character for a valid command 7 Delimiter character for an invalid command AA Address of the responding module 00 to FF SS Two hexadecimal digits that represent the host watchdog status where Bit 7 O indicates that the host watchdog is disabled and indicates that the host watchdog is enabled Bit 2 1 indicates that a host watchdog timeout has occurred and 0 indicates that no host watchdog timeout has occurred The host watchdog status is stored in EEPROM and can only be reset by using the AA1 command 100 tM TH8 User Manual Rev A1 0 7MH 018 A10 tM TH8 There will be no
45. hart coefficient C Data The Data is eight hexadecimal digits in IEEE 754 format to represent the Steinhart coefficient See Section 1 11 for details Response Valid command AA CHKSUM CR Invalid command 4A CHKSUM CR Delimiter character for a valid command 7 Delimiter character for an invalid command or invalid type code AA Address of the responding module 00 to FF There will be no response if the command syntax is incorrect there is a communication error or there is no module with the specified address tM TH8 User Manual Rev A1 0 7MH 018 A10 97 tM TH8 Examples Command 01SAT70C3A94030A Response 01 Sets the A coefficient of type 70 of module 01 to be 3A94030A which is equivalent to 1 129241x10 and the module returns a valid response Command 01SBT70C39757ACF Response 01 Sets the B coefficient of type 70 of module 01 to be 39757 ACF which is equivalent to 2 341077x10 and the module returns a valid response Command 01SCT70C33BC73A5 Response 01 Sets the C coefficient of type 70 of module 01 to be 33BC73A5 which is equivalent to 8 775468x 10 and the module returns a valid response Related Commands Section 2 31 AAGxTtt Section 2 32 AARTTttR data Related Topics Section 1 11 User defined Types Section A 5 Thermistor Notes If the resistance versus temperature data table of the thermistor is available it is suggested that the AARTTttR data command be used to veri
46. he A coefficient of type 70 of module 01 and returns a value of 3A94030A which is equivalent to 1 129241x10 Command 01GBT70 Response 0139757ACEF Reads the B coefficient of type 70 of module 01 and returns a value of 39757ACF which is equivalent to 2 341077x10 Command 01GCT70 Response 0133BC73A5 Reads the C coefficient of type 70 of module 01 and returns a value of 33BC73A5 which is equivalent to 8 775468x 10 Related Commands Section 2 32 AARTTttR data Section 2 33 AASxTttC data Related Topics Section 1 11 User defined Types Section A 5 Thermistor 94 tM TH8 User Manual Rev A1 0 7MH 018 A10 tM TH8 2 32 AARTTttR Data Description Reads the temperature associated with the input resistance of a user defined type Syntax AARTTttR Data CHKSUM CR Delimiter character AA Address of the module to be read 00 to FF RT Command to read the temperature associated with the input resistance of a user defined type Ttt tt represents the type code of the user defined type R Data The Data consists of seven decimal digits or five digits decimal point and one additional digit to represent the input resistance Response Valid command AA Data CHKSUM CR Invalid command 4A CHKSUM CR Delimiter character for a valid command 7 Delimiter character for an invalid command or invalid type code AA Address of the responding module 00 to FF Data The Data consists of a s
47. he tM TH8 you can send the AAS1 command see Section 2 18 for details to reload the factory calibration parameters tM TH8 User Manual Rev A1 0 7MH 018 A10 133 A Appendix A 1 INIT Mode Each tM module has a built in EEPROM to store configuration information such as module address type code Baud Rate etc Occasionally the configuration of a module may be forgotten and there are no visual indications of the configuration of the module It is difficult to communicate with the module when the configuration of the module is unknown To help avoid this problem the tM series has a special mode called INIT mode When the module is powered on in INIT mode the configuration of the module is reset as follows allowing it to be operated as normal 1 Address 00 2 Baud Rate 9600 bps 3 No checksum 4 Protocol DCON The configuration information stored in the EEPROM is not changed and can be read by sending the 002 CR command at 9600bps There are commands that require the module to be in INIT mode They are 1 7 AANNTTCCFF when changing Baud Rate and checksum settings See Section 2 1 for details 2 AAPN see Section 2 17 for details 134 tM TH8 User Manual Rev A1 0 7MH 018 A10 The tM modules have the INIT switch located on the right side of the module allow easier access to INIT mode For these modules INIT mode is accessed by sliding the INIT switch to the Init position as shown below Run lt
48. ign three digits decimal point and two additional digits to represent the temperature associated with the input resistance tM TH8 User Manual Rev A1 0 7MH 018 A10 95 tM TH8 There will be no response if the command syntax is incorrect there is a communication error or there is no module with the specified address Examples Command 01RTT70R0104500 Response 01 032 64 Reads the temperature associated with 104500 ohms of type 70 of module 01 and the module returns a value of 32 64 degree Command 01RTT70R00801 2 Response 01 072 62 Reads the temperature associated with 801 2 ohms of type 70 of module 01 and the module returns a value of 72 62 degree Related Commands Section 2 19 AAD Section 2 20 AADT Section 2 31 AAGxTtt Section 2 33 AASxTttC data Related Topics Section A 6 Thermistor Notes The temperature scale is set using the AADT command and can be read using the AAD command See Sections 2 19 and 2 20 for details 96 tM TH8 User Manual Rev A1 0 7MH 018 A10 tM TH8 2 33 AASxTttC data Description Sets the Steinhart coefficient of a user defined type Syntax AASxTttC data CHKSUM CR Delimiter character AA Address of the module to be set 00 to FF S Command to set the Steinhart coefficient x A sets Steinhart coefficient A B sets Steinhart coefficient B C sets Steinhart coefficient C Ttt tt represents the type code of the user defined type to set the Stein
49. ing out of range incorrect number of bytes received tM TH8 User Manual Rev A1 0 7MH 018 A10 125 tM TH8 3 6 10 Sub function 41 0x29 Read miscellaneous settings This sub function code is used to read the miscellaneous settings of a module Request 00 Address 1 Byte 1 to 247 Ol Function code 1 Byte 0x46 02 Sub function code 1 Byte 0x29 Response 00 Address 1 Byte 1 to 247 0l Function code 1 Byte 10x46 02 Sub function code 1 Byte 0x29 03 Miscellaneous 1 Byte 0 not used for tM TH8 settings Error Response 00 Address 1 Byte 1 to 247 0l Function code 1 Byte OxC6 02 Exception code l Byte 03 incorrect number of bytes received 126 tM TH8 User Manual Rev A1 0 7MH 018 A10 tM TH8 3 6 11 Sub function 42 0x2A Write miscellaneous settings This sub function code is used to set the miscellaneous settings of a module Request 00 Address 1 Byte 1 to 247 Ol Function code 1 Byte 0x46 02 Sub function code 1 Byte Ox2A 03 Miscellaneous 1 Byte 0 not used for tM TH8 settings Response 00 Address 1 Byte 1 to 247 01 Function code 1 Byte 10x46 02 Sub function code 1 Byte Ox2A 03 Miscellaneous l Byte 0 OK settings others error Error Response 00 Address 1 Byte 1 to 247 01 Function code 1 Byte OxC6 02 Exception code l
50. ition and control modules providing analog to digital digital to analog digital input output and other functions The modules can be remotely controlled using a set of commands which we call the DCON protocol or the standard Modbus protocol Communication between the module and the host is via an RS 485 bi directional serial bus standard Baud Rates are software programmable and transmission speeds of up to 115 2 Kbps can be selected The tM series feature a new design for the frame ground and INIT switch as shown in the figure The frame ground provides enhanced static protection ESD abilities and ensures the module is more reliable The INIT switch allows easier access to INIT mode Please refer to Sections A 1 and A 3 for more details Run lt gt Init fare m E mi The features of the tM TH8 module are as follows 1 24 bit sigma delta ADC to provide excellent accuracy 2 Direct thermistor connection 3 Software calibration The tM TH 8 is an 8 channel thermistor input module Supported thermistor types are as follows tM TH8 User Manual Rev Al 0 7MH 018 A10 5 PreCon Type HI Model 3 10 000 Ohms at 25 C 77 F Fenwell Type U 2000 Ohms at 25 C YSI L Mix 100 Ohms at 25 C YSI L Mix 300 Ohms at 25 C YSI L Mix 1000 Ohms at 25 C YSI B Mix 2252 Ohms at 25 C YSI B Mix 3000 Ohms at 25 C YSI B Mix 5000 Ohms at 25 C YSI B Mix 6000 Ohms at 25 C 10 YSI B Mix 10000 Ohms at 25 C 11
51. l If a CRC mismatch occurs the module will not respond 108 tM TH8 User Manual Rev A1 0 7MH 018 A10 tM TH8 3 1 01 0x01 Read Coil Registers This function code is used to read the digital output channel status of a module Request 00 Address 1 Byte 1 to 247 01 Function code 1 Byte 0x01 02 03 Starting channel 2 Bytes 256 to 272 04 05 jNumber of digital 2 Bytes N 1 to 16 output channels Response 00 Address 1 Byte 1 to 247 01 Function code 1 Byte 0x01 02 Byte count 1 Byte l 03 Data of digital 1 Byte A bit corresponds to a channel output channels When the bit is 1 it denotes that the channel is ON If the bit is 0 it denotes that the channel is OFF Error Response 00 Address 1 Byte 1 to 247 01 Function code 1 Byte 0x81 02 Exception code l Byte 02 starting channel out of range 03 out of range incorrect number of bytes received tM TH8 User Manual Rev A1 0 7MH 018 A10 109 tM TH8 3 2 02 0x02 Read Input Status This function code is used to read the thermistor wire opening status of a module Request 00 Address 1 Byte 1 to 247 01 Function code 1 Byte 0x02 02 03 Starting channel 2 Bytes 0x80 to 0x87 where 0x80 corresponds to channel 0 0x81 corresponds to channel 1 etc 04 05 jNumber of input 2 Bytes N 1 to 8 Starti
52. led with zero incorrect number of bytes received 120 tM TH8 User Manual Rev A1 0 7MH 018 A10 tM TH8 3 6 5 Sub function 07 0x07 Read type code This sub function code is used to read the type code information of a module Request 00 Address 1 Byte 1 to 247 Ol Function code 1 Byte 0x46 02 Sub function code 1 Byte 0x07 03 Reserved 1 Bytes 0x00 04 Channel 1 Byte 0x00 0x07 for tM TH8 Response 00 Address 1 Byte 1 to 247 01 Function code 1 Byte 0x46 02 Sub function code 1 Byte 0x07 03 Type code 1 Byte Type code see Section 1 10 for details Error Response 00 Address 1 Byte 1 to 247 01 Function code 1 Byte OxC6 02 Exception code l Byte 03 reserved bytes should be filled with zero channel out of range incorrect number of bytes received tM TH8 User Manual Rev A1 0 7MH 018 A10 121 tM TH8 3 6 6 Sub function 08 0x08 Set type code This sub function code is used to set the type code of a module Request 00 Address 1 Byte 1 to 247 01 Function code 1 Byte 0x46 02 Sub function code 1 Byte 0x08 03 Reserved 1 Byte 0x00 04 Channel 1 Byte 0x00 0x07 for tM TH8 05 Type code 1 Byte Type code see Section 1 10 for details Response 00 Address 1 Byte 1 to 247 01 Function code 1 Byte 0x46 02 Sub function code 1 Byte 0x08 03 Type code 1 Byte 0
53. mmand 4A CHKSUM CR Delimiter character for a valid command 1 Delimiter character for an invalid command AA Address of the responding module 00 to FF There will be no response if the command syntax is incorrect there is a communication error or there is no module with the specified address Examples Command O1I Response 01 Sets the soft INIT timeout value of module 01 and returns a valid response Command 0101000700 Response 01 Attempts to change the Baud Rate of module 01 to 19200 without first altering the INIT status The module returns an invalid response because the soft INIT timeout value is 0 Command 01T10 Response 01 Sets the soft INIT timeout value of module 01 to 16 seconds and returns a valid response Command O1I Response 01 Sets the soft INIT of module 01 and returns a valid response Command 0101000700 Response 01 Changes the Baud Rate of module 01 to 19200 without first altering INIT status The module returns a valid response tM TH8 User Manual Rev A1 0 7MH 018 A10 83 tM TH8 Related Commands Section 2 1 7 AANNTTCCFFE Section 2 22 AAI Related Topics Section A 1 INIT Pin Operation Notes It is recommended that the soft INIT timeout value is reset to 0 once any changes to the Baud Rate and checksum settings have been completed 84 tM TH8 User Manual Rev A1 0 7MH 018 A10 tM TH8 2 27 AAA2CiToo Description Sets the temperature offset of a channel
54. mmand to set the type of each channel see Section 2 10 for details CC New Baud Rate code see Section 1 10 for details For the tM TH8 the slide switch must be moved to the INIT position in order to change Baud Rates See Section A 1 for details FF Used to set the data format checksum and filter settings Section 1 10 For the tW TH 8 the slide switch must be moved to the INIT position in order to change the checksum setting See Section A 1 for details tM TH8 User Manual Rev A1 0 7MH 018 A10 33 tM TH8 Response Valid Command AA CHKSUM CR Invalid Command 74A CHKSUM CR Delimiter for a valid command j Delimiter for an invalid command If the Baud Rate or checksum settings are changed without switching the slide switch to the INIT position the module will return an invalid command AA Address of the module in hexadecimal format 00 to FF There will be no response if the command syntax is incorrect there is a communication error or there is no module with the specified address Examples Command 0102200600 Response 02 Changes the address of module 01 to 02 The module returns a valid response Command 0202200603 Response 02 Sets the data format of module 02 to be 3 Ohms The module returns a valid response Command 0101200A00 Response 01 Changes the Baud Rate of module 01 to 115200bps The module returns an invalid command because it is not in INIT mode 34 tM TH8 User Manual Re
55. n Wire Detection Yes Individual Channel Yes Configurable Protocol DCON Modbus RTU Modbus ASCII Overvoltage Protection 120 VDC Intra module Isolation 2500 VDC Power Reverse Polarity Protection Yes Requirement 10 to 30 VDC Consumption 0 6 W Environment Operating Temperature 25 C to 75 C Storage Temperature 30 C to 75 C Humidity 10 95 RH non condensing Note A warm up period of 30 minutes is recommended in order to achieve the complete performance results described in the specifications tM TH8 User Manual Rev A1 0 7MH 018 A10 9 1 4 Block Diagrams 1 4 1 Block Diagram for the tM TH8 R Block Diagram _ r Embedded U Controller lt 7 A gt ADC INIT car NGN DATA RS 485 M DATA Interface GND Regulator 1 Frame Ground pa 10 tM TH8 User Manual Rev A1 0 7MH 018 A10 VINO VIN1 VIN2 VIN3 VIN4 VINS VING VIN7 AGND 1 5 Dimensions a _ m Left Side View Back View Right Side View Bottom View tM TH8 User Manual Rev A1 0 7MH 018 A10 11 1 6 Wiring 1 6 1 tM TH8 Wiring Thermistor Input 1 6 2 Wiring Recommendations Use 26 12 AWG wire for signal connections Strip the wire to a length of 7 0 5mm Use a crimp terminal for wiring Avoid high voltage cables and power equipment as much as possible For RS 485 communication use insulated and twisted pair 24 AWG wire e g Belden 9841 12 tM TH8
56. nd syntax is incorrect there is a communication error or there is no module with the specified address Examples Command 01F Response 01A2 0 Reads the firmware version of module 01 and shows that it is version A2 0 Command 02F Response 02B1 1 Reads the firmware version of module 02 and shows that it is version B1 1 58 tM TH8 User Manual Rev A1 0 7MH 018 A10 tM TH8 2 14 AAI Description Reads the INIT status of a module Syntax AATI CHKSUM CR Delimiter character AA Address of the module to be diagnosed 00 to FF I Command to read the module INIT status Response Valid command AAS CHKSUM CR Invalid command 4A CHKSUM CR Delimiter character for a valid command Delimiter character for an invalid command AA Address of the responding module 00 to FF S INIT switch status of the module 0 The INIT switch is moved to the INIT position 1 The INIT switch is moved to the Normal position There will be no response if the command syntax is incorrect there is a communication error or there is no module with the specified address tM TH8 User Manual Rev A1 0 7MH 018 A10 59 tM TH8 Examples Command 011 Response 010 Reads the INIT status of module 01 The response shows that the INIT switch is moved to the INIT position 60 tM TH8 User Manual Rev A1 0 7MH 018 A10 tM TH8 2 15 AAM Description Reads the name of a module Syntax S AAM CHKSUM CR Delimiter
57. nel Syntax AA7CiRrr CHKSUM CR Delimiter character AA Address of the module to be set 00 to FF 7 Command to set the channel range code Ci 1 Specifies the input channel to be set 0 7 Rrr rr represents the type code of the channel to be set Refer to the Temperature Sensor Type Setting table in Section 1 10 Response Valid command AA CHKSUM CR Invalid command AA CHKSUM CR Delimiter character for a valid command Delimiter character for an invalid command or invalid type code AA Address of the responding module 00 to FF There will be no response if the command syntax is incorrect there is a communication error or there is no module with the specified address 52 tM TH8 User Manual Rev A1 0 7MH 018 A10 tM TH8 Examples Command 017COR60 Response 01 Sets the type code for channel 0 of module 01 to be 60 and the module returns a valid response Command 027C5R72 Response 02 Sets the type code for channel 5 of module 02 to be 72 and the module returns a valid response Command 037C1R30 Response 03 Sets the type code for channel 1 of module 03 to be 30 The module returns an invalid response because the type code 1s invalid Related Commands Section 2 11 AA8Ci Related Topics Section 1 10 Configuration Tables tM TH8 User Manual Rev A1 0 7MH 018 A10 53 tM TH8 2 11 AA8Ci Description Reads the type code information of a channel Syntax A A8Ci CHKSUM CR
58. ng channel N channels should be less than or equal to 0x88 Response 00 Address 1 Byte l to 247 0l Function code 1 Byte 0x02 02 Byte count 1 Byte I 03 Data of input 1 Byte A bit corresponds to a channel channels When the bit is 1 it denotes that the channel is enabled and is either over range under range or wire opening If the bit is 0 it denotes that the channel is disabled or normal Error Response 00 Address 1 Byte 1 to 247 01 Function code 1 Byte 0x82 02 Exception code l Byte 02 starting channel out of range 03 starting channel number of input channels out of range incorrect number of bytes received 110 tM TH8 User Manual Rev A1 0 7MH 018 A10 tM TH8 3 3 04 0x04 Read Input Channels This function code is used to read from contiguous analog input channels Request 00 Address 1 Byte 1 to 247 01 Function code 1 Byte 0x04 02 03 Starting channel 2 Bytes 0 to7 04 05 Number of input 2 Bytes l to 8 Starting channel N lt channels N 8 Response 00 Address 1 Byte 1 to 247 01 Function code 1 Byte 0x04 02 Byte count l Byte 2xN 03 Data of input 2xN Datain 2 s complement hex channels Bytes format Error Response 00 Address 1 Byte 1 to 247 01 Function code 1 Byte 0x84 02 Exception code l Byte 02 starting channel out of range 03 starting channel number of in
59. nn 74 tM TH8 User Manual Rev A1 0 7MH 018 A10 tM TH8 Related Topics Section A 1 INIT Pin Operation Notes The AATnn command should be sent prior to sending this command see Section 2 26 for details tM TH8 User Manual Rev A1 0 7MH 018 A10 75 tM TH8 2 23 AAO Name Description Sets the name of a module Syntax AAO Name CHKSUM CR Delimiter character AA Address of the module to be set 00 to FF O Command to set the module name Name New name of the module max 6 characters Response Valid command AA CHKSUM CR Invalid command 4A CHKSUM CR Delimiter character for a valid command 7 Delimiter character for an invalid command AA Address of the responding module 00 to FF There will be no response if the command syntax is incorrect there is a communication error or there is no module with the specified address 76 tM TH8 User Manual Rev A1 0 7MH 018 A10 tM TH8 Examples Command 0107005N Response 01 Sets the name of module 01 to be 7005N and returns a valid response Command 01M Response 017005N Reads the name of module 01 and returns the name 7005N Related Commands Section 2 15 AAM tM TH8 User Manual Rev A1 0 7MH 018 A10 T11 tM TH8 2 24 AARD Description Reads the response delay time value of a module Syntax AARD CHKSUM CR Delimiter character AA Address of the module to be read 00 to FF RD Command to r
60. og is enabled and the host watchdog timeout value is 25 5 seconds Related Commands Section 2 34 Section 2 35 AAO Section 2 36 AAI1 Section 2 38 AA3EVV Related Topics Section A 2 Dual Watchdog Operation tM TH8 User Manual Rev A1 0 7MH 018 A10 105 tM TH8 2 38 AA3SEVV Description Enables disables the host watchdog and sets the host watchdog timeout value of a module Syntax AA3EVV CHKSUM CR Delimiter character AA Address of the module to be set 00 to FF 3 Command to set the host watchdog E 1 enable the host watchdog 0 disable the host watchdog VV Two hexadecimal digits to represent the timeout value in tenths of a second for example 01 denotes 0 1 seconds and FF denotes 25 5 seconds Response Valid command AA CHKSUM CR Invalid command 4A CHKSUM CR Delimiter character for a valid command Delimiter character for an invalid command AA Address of the responding module 00 to FF There will be no response if the command syntax is incorrect there is a communication error or there is no module with the specified address 106 tM TH8 User Manual Rev A1 0 7MH 018 A10 tM TH8 Examples Command 013164 Response 01 Enables the host watchdog of module 01 and sets the host watchdog timeout value to 10 0 seconds The module returns a valid response Command 012 Response 01164 Reads the host watchdog timeout value of module 01 The module returns 164 which denote
61. ote It is recommended that a 16 14 AWG wire is used to connect the DIN rail to the earth ground tM TH8 User Manual Rev A1 0 7MH 018 A10 27 1 14 Technical Support Should you encounter any problems while using the tM TH8 module and are unable to find the help you need in this manual or on our website please contact ICP DAS Product Support Email support icpdas com Website http www icpdas com service support htm When requesting technical support be prepared to provide the following information about your system 1 Module name and serial number The serial number can be found printed on the barcode label attached to the cover of the module 2 Firmware version See Section 2 13 and 3 6 7 for information regarding the command used to identify the firmware version 3 Host configuration type and operating system 4 If the problem is reproducible please give full details describing the procedure used to reproduce the problem 5 Any specific error messages displayed If a dialog box with an error message is displayed please include the full text of the dialog box including the text in the title bar 6 If the problem involves other programs or hardware devices please describe the details of the problem in full 7 Any comments and suggestions related to the problem are welcome ICP DAS will reply to your request by email within three business days 28 tM TH8 User Manual Rev Al 0 7MH 018 A10 2
62. ponse 01 Performs a span calibration on module 01 and returns a valid response Command 020 Response 02 Performs a span calibration on module 02 and returns a valid response Command 030 Response 03 Performs a span calibration on module 03 An invalid command is returned because the enable calibration command was not sent in advance Related Commands Section 2 5 AA1 Section 2 21 AAEV Related Topics Section 1 9 Calibration Notes The enable calibration command AAEV must be sent before this command is used see Section 1 9 for details tM TH8 User Manual Rev A1 0 7MH 018 A10 41 tM TH8 2 5 AA1 Description Performs a zero calibration Syntax AA1 CHKSUM CR Delimiter character AA Address of the module to be calibrated 00 to FF 1 Command for the zero calibration Response Valid Command AA CHKSUM CR Invalid Command 4A CHKSUM CR Delimiter character for a valid command Delimiter character for an invalid command An invalid command is returned 1f the specified channel is incorrect AA Address of the responding module 00 to FF There will be no response if the command syntax is incorrect there is a communication error or there is no module with the specified address 42 tM TH8 User Manual Rev A1 0 7MH 018 A10 tM TH8 Examples Command 011 Receive 01 Performs a zero calibration on module 01 and returns a valid response Command 021 Receive
63. put channels out of range incorrect number of bytes received tM TH8 User Manual Rev A1 0 7MH 018 A10 111 tM TH8 3 4 05 0x05 Write Single Coil Register This function code is used to write to one digital output channel Request 00 Address 1 Byte 1 to 247 01 Function code 1 Byte 0x05 02 03 Channel 2 Bytes 256 to 271 04 05 Data 2 Bytes FFOOh for ON and 0000h for OFF Response 00 Address 1 Byte 1 to 247 01 Function code 1 Byte 0x04 02 03 Channel 2 Bytes 256 to 271 04 05 Data 2 Bytes FFOOh for ON and 0000h for OFF Error Response 00 Address 1 Byte 1 to 247 01 Function code 1 Byte 0x85 02 Exception code l Byte 02 channel out of range 112 tM TH8 User Manual Rev A1 0 7MH 018 A10 tM TH8 3 5 15 OxOF Write Multiple Coil Registers This function code is used to write to multiple digital output channels Request 00 Address 1 Byte 1 to 247 01 Function code 1 Byte OxOF 02 03 Starting channel 2 Bytes 256 to 271 04 05 Number of 2 Bytes 1 to 16 channels N 06 Byte count 1 Byte I1 07 Data of digital 1 Byte A bit corresponds to a coil When output channels the bit is 1 it denotes that the coil is ON If the bit is 0 it denotes that the coil is OFF Response 00 Address 1 Byte 1 to 247 01 Function code 1 Byte O
64. r character for a valid command Delimiter character for an invalid command AA Address of the responding module 00 to FF NN Represents the diagnostic results of all the analog input channels OO to FF where bit 0 corresponds to channel 0 bit 1 corresponds to channel 1 etc When the bit is 1 it denotes that the channel is enabled and it is in either over range under range or wire opening condition If the bit is 0 it denotes that the channel is disabled or normal There will be no response if the command syntax is incorrect there is a communication error or there is no module with the specified address 56 tM TH8 User Manual Rev A1 0 7MH 018 A10 tM TH8 Examples Command 01B Response 0101 Diagnoses the analog inputs of module 01 The module returns a valid response denoting that channel 1 is in either over range under range or wire opening condition tM TH8 User Manual Rev A1 0 7MH 018 A10 57 tM TH8 2 13 AAF Description Reads the firmware version of a module Syntax AAF CHKSUM CR Delimiter character AA Address of the module to be read 00 to FF F Command to read the firmware version Response Valid command AA Data CHKSUM CR Invalid command 4A CHKSUM CR Delimiter character for a valid command Delimiter character for an invalid command AA Address of the responding module 00 to FF Data Firmware version string of the module There will be no response if the comma
65. reset since the last AA5 command was sent tM TH8 User Manual Rev A1 0 7MH 018 A10 47 tM TH8 2 8 AA5VV Description Specifies the channels to be enabled Syntax AA5VV CHKSUM CR Delimiter character AA Address of the module to be set 00 to FF 5 Command to set the channels to enabled VV A two digit hexadecimal value where bit 0 corresponds to channel 0 bit 1 corresponds to channel 1 etc When the bit is 1 it denotes that the channel is enabled and O denotes that the channel is disabled Response Valid Command AA CHKSUM CR Invalid Command 4A CHKSUM CR Delimiter character for a valid command Delimiter character for an invalid command An invalid command is returned if an attempt is made to enable a channel that is not present AA Address of the responding module 00 to FF There will be no response if the command syntax is incorrect there is a communication error or there is no module with the specified address 48 tM TH8 User Manual Rev A1 0 7MH 018 A10 tM TH8 Examples Command 0153A Response 01 Enables channels 1 3 4 and 5 and disables all other channels of module 01 The module returns a valid response Command 016 Response 013A Reads the channel status of module 01 The module returns a response of 3A which denotes that channels 1 3 4 and 5 are enabled and all other channels are disabled Related Commands Section 2 9 AA6 Notes It is recommende
66. response if the command syntax is incorrect there is a communication error or there is no module with the specified address Examples Command 010 Response 0100 Reads the host watchdog status of module 01 and returns 00 meaning that the host watchdog is disabled and no host watchdog timeout has occurred Command 020 Response 0204 Reads the host watchdog status of module 02 and returns 04 meaning that a host watchdog timeout has occurred Related Commands Section 2 34 Section 2 36 AA1 Section 2 37 AA2 Sec 2 38 AA3EVV Related Topics Section A 2 Dual Watchdog Operation tM TH8 User Manual Rev A1 0 7MH 018 A10 101 tM TH8 2 36 AA1 Description Resets the host watchdog timeout status of a module Syntax AAI1 CHKSUM CR Delimiter character AA Address of the module to be reset 00 to FF l Command to reset the host watchdog timeout status Response Valid command AA CHKSUM CR Invalid command 4A CHKSUM CR Delimiter character for a valid command Delimiter character for an invalid command AA Address of the responding module 00 to FF There will be no response if the command syntax is incorrect there is a communication error or there is no module with the specified address 102 tM TH8 User Manual Rev A1 0 7MH 018 A10 tM TH8 Examples Command 010 Response 0104 Reads the host watchdog status of module 01 and shows that a host watchdog timeout has occurred
67. s that the host watchdog is enabled and the host watchdog timeout value is 10 0 seconds Related Commands Section 2 34 Section 2 35 AAO Section 2 36 AAI1 Section 2 37 AA2 Section Related Topics Section A 2 Dual Watchdog Operation Notes When a host watchdog timeout occurs the host watchdog is disabled The AA3EVV command should be sent again to reenable the host watchdog tM TH8 User Manual Rev A1 0 7MH 018 A10 107 3 Modbus RTU Protocol The Modbus protocol is developed by Modicon Inc originally developed for Modicon controllers Detailed information can be found at http www modicon com techpubs toc7 html You can also visit http www modbus org to find more valuable information The tM TH8 supports the Modbus RTU and Modbus ASCII protocols The communication Baud Rates range from 1200bps to 115200bps The following Modbus functions are supported by the tM TH8 Function Code Description Section 01 0x01 Read digital output status 3 1 02 0x02 Read input status 3 2 04 0x04 Read input channels 3 3 05 0x05 Write single digital output 3 4 15 OxOF Write multiple digital outputs 3 5 70 0x46 Read write module settings 3 6 If the function specified in the message is not supported then the module responds as follows Error Response 00 Address 1 Byte 1 to 247 01 Function code I Byte Function code 0x80 02 Exception code 1 Byte O
68. scription 31 sign 0 positive 1 negative 30 23 exponent The exponent base is 2 The actual exponent is calculated by subtracting 127 from the stored value 22 00 mantissa The mantissa is expressed as 1 f where f is the fractional part and is stored in this field Example For the hexadecimal value C3694000h 1 Bit 3lis 1 indicating a negative number 2 The value of bits 30 23 is 10000110 binary or 134 decimal The exponent is 7 134 127 3 The mantissa is 1 11010010100000000000000 binary 4 Adjust the mantissa for the exponent The adjusted mantissa is 11101001 0100000000000000 binary That is 233 25 decimal 5 Considering the sign bit The floating point number of C3694000h is 233 25 The following methods can be used to obtain the Steinhart Coefficients of a thermistor 22 tM TH8 User Manual Rev A1 0 7MH 018 A10 1 Ask the manufacturer Usually thermistor manufacturers publish data for the Steinhart Coefficients for their thermisotr products 2 Solve the coefficients by using three known data sets R1 T1 R2 T2 and R3 T3 which can be obtained by referring to the published Resistance versus Temperature data table of the thermistor They can be obtained by measurement if no published data table is available In order to achieve the most accurate results the following values are recommended 40 C lt T1 T2 T3 lt 150 C and IT2 T11 lt 50 C IT3 T2I lt 50 C
69. tM TH8 User Manual Warranty All products manufactured by ICP DAS are under warranty regarding defective materials for a period of one year from the date of delivery to the original purchaser Warning ICP DAS assumes no liability for damages resulting from the use of this product ICP DAS reserves the right to change this manual at any time without notification The information furnished by ICP DAS is believed to be accurate and reliable However no responsibility is assumed by ICP DAS for its use or for any infringements of patents or other rights of third parties resulting from its use Copyright Copyright 1999 2012 ICP DAS All rights reserved Trademark The names used for identification only may be registered trademarks of their respective companies Date 2012 3 29 tM TH8 User Manual Rev A1 0 7MH 018 A10 1 Table of Contents Tait rareht era ke maneni a tense mtn ehtn naa return renee ett tat 5 1 1 More Intormatioi s serer E kash ateeess 7 1 2 Terminal Assrenment ssicscccct sac sdateatubanagesnmesienncaeiomes 8 he SSC CIIIC ALLO NS ioe i A E E 9 1 4 Block Dias rams icigescccsttas en ati sdaisaresaideiaaiativeneiteaseens 10 1 4 1 Block Diagram for the tM TH8 0 eee 10 L3 Dimens TOS goat AE te niuet aoa nehocnsteunsateededhs 11 KOWIHTS enine nunn aee a O O 12 EOT IM THS Wirinia ute ae aa eE EASES 12 1 6 2 Wiring Recommendations sseeseeeeeeeeeeesseeeesessee 12 FF OUI Star na n aden eer a E ee
70. tM TH8 User Manual Rev A1 0 7MH 018 A10 91 tM TH8 Examples Command 01A7C2 Response O10A Reads the resistance offset of channel 2 and the module returns a value of 1 0 Command 01A7C5 Response 01F0 Reads the resistance offset of channel 5 and the module returns a value of 24 0 Related Commands Section 2 29 AAA6CiRrr 92 tM TH8 User Manual Rev A1 0 7MH 018 A10 tM TH8 2 31 AAGxTit Description Reads the Steinhart coefficient of a user defined type Syntax AAGxTtt CHKSUM CR Delimiter character AA Address of the module to be read 00 to FF G Command to read the Steinhart coefficient x A reads Steinhart coefficient A B reads Steinhart coefficient B C reads Steinhart coefficient C Ttt tt represents the type code of the user defined type to read the Steinhart coefficient Response Valid command AA Data CHKSUM CR Invalid command 4A CHKSUM CR Delimiter character for a valid command Delimiter character for an invalid command or invalid type code AA Address of the responding module 00 to FF Data Eight hexadecimal digits to represent the Steinhart coefficient in IEEE 754 format See Section 1 11 for details There will be no response if the command syntax is incorrect there is a communication error or there is no module with the specified address tM TH8 User Manual Rev A1 0 7MH 018 A10 93 tM TH8 Examples Command 01GAT70 Response 013A94030A Reads t
71. te the DCON Utility to determine whether the module can be found The DCON Utility can be downloaded from the ICP DAS website http www icpdas com The DCON Utility documentation can be found in the Getting Started For I 7000 Series Modules manual Set the module to INIT mode and communicate with the module using the following settings address 00 Baud Rate 9600bps and no checksum See Section A 1 for details tM TH8 User Manual Rev A1 0 7MH 018 A10 4 2 Reading Data If the data read from the input channel is not correct first check the following oO Ensure that the type code and data format settings are correct For the tM TH8 the type code is set by using the AA7CiRrr command see Section 2 10 for details The data format is set by using the 7 AANNTTCCFF command For the Modbus RTU protocol the type code is set by using sub function 08h of the function 46h Connect a resistor instead of thermistor sensor using the thermistor connection as shown in Section 1 6 The resistance of the resistor should be less than 180000 ohms Change the data format to ohms see Sections 1 10 and 2 1 and check whether the data reading is correct If the resistance read by the module is still incorrect then it may be because the calibration parameters stored in the non volatile memory are corrupted which means that the module should be recalibrated Be sure to read Section 1 9 in detail before performing the calibration For t
72. v A1 0 7MH 018 A10 1 7005 M 7005 Command 0101200A00 Response 01 Changes the Baud Rate of module 01 to 115200bps and the module is in INIT mode The module returns a valid response Related Commands Section 2 6 AA2 Section 2 22 AAI Section 2 26 AATnn Related Topics Section 1 10 Configuration Tables Section A 1 INIT pin Operation Notes 1 Changes to the address type code and data format settings take effect immediately after a valid command is received Changes to the Baud Rate and checksum settings take effect on the next power on reset 2 For the tM TH8 changing the Baud Rate and checksum settings can be achieved by software only and is performed by using the following commands I Send a AATnn command See Section 2 26 for details II Send a AAI command See Section 2 22 for details III Send a Z7AANNTTCCFEF command If the command is valid the Baud Rate and checksum settings will be changed after the module responds with AA tM TH8 User Manual Rev A1 0 7MH 018 A10 35 tM TH8 2 2 HAA Description Reads the data from all analog input channels Syntax AA CHKSUM CR Delimiter character AA Address of the module to be read 00 to FF Response Valid Command gt Data CHKSUM CR Invalid Command 2 AA CHKSUM CR gt Delimiter character for a valid command Delimiter character for an invalid command Data Data from all analog input channels see Section 1 10 for the
73. x0OF 02 03 Starting channel 2 Bytes 256 to 271 04 05 Number of 2 Bytes 1 to 16 channels N Error Response 00 Address 1 Byte 1 to 247 01 Function code 1 Byte Ox8F 02 Exception code l Byte 02 starting channel out of range 03 out of range incorrect number of bytes received tM TH8 User Manual Rev A1 0 7MH 018 A10 113 3 6 70 0x46 Read Write Module Settings This function code is used to read the settings of the module or change the settings of the module The following sub function codes are supported Sub function Code Description Section 00 0x00 Read the module name 3 6 1 04 0x04 Set the module address 3 6 2 05 0x05 Read the communication settings 3 6 3 06 0x06 Set the communication settings 3 6 4 07 0x07 Read the type code 3 6 5 08 Ox08 Set the type code 3 6 6 32 0x20 Read the firmware version 3 6 7 37 0x25 Read the channel enable disable 13 6 8 status 38 0x26 Set the channel enable disable 3 6 9 41 0x29 Read the miscellaneous settings 3 6 10 42 Ox2A Write the miscellaneous settings 3 6 11 If the module does not support the sub function code specified in the message then it responds as follows Error Response 00 Address 1 Byte 1 to 247 01 Function code I Byte OxC6 02 Exception code 1 Byte 02 invalid sub function code 114 tM TH8 User Manual Rev A1 0 7MH 018 A10 t

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