ICP DAS USA TM-TH8 User manual

tM-TH8 User Manual, Rev: A1.1 7MH-018-A11

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.

Trademark

The names used for identification only may be

registered trademarks of their respective companies.

Date: 2018/8/15

tM-TH8 User Manual, Rev: A1.1 7MH-018-A11

Table of Contents

1. Introduction................................................................................5

1.1 More Information...............................................................7

1.2 Terminal Assignment......................................................... 8

1.3 Specifications.....................................................................9

1.4 Block Diagrams................................................................10

1.4.1 Block Diagram for the tM-TH8..............................10

1.5 Dimensions.......................................................................11

1.6 Wiring ..............................................................................12

1.6.1 tM-TH8 Wiring....................................................... 12

1.6.2 Wiring Recommendations ......................................12

1.7 Quick Start .......................................................................13

1.8 Default Settings................................................................14

1.9 Calibration........................................................................15

1.10 Configuration Tables .....................................................16

1.11 User-defined Types........................................................22

1.12 tM-TH8 Notes................................................................ 24

1.12.1 Protocol Switching................................................ 24

1.12.2 INIT Mode ............................................................25

1.13 Mounting........................................................................26

1.13.1 Din-Rail Mounting................................................ 26

1.14 Technical Support..........................................................28

2. DCON Protocol........................................................................29

2.1 %AANNTTCCFF............................................................33

2.2 #AA..................................................................................36

2.3 #AAN............................................................................... 38

2.4 $AA0................................................................................40

2.5 $AA1................................................................................42

2.6 $AA2................................................................................44

2.7 $AA5................................................................................46

2.8 $AA5VV .......................................................................... 48

2.9 $AA6................................................................................50

2.10 $AA7CiRrr.....................................................................52

2.11 $AA8Ci..........................................................................54

2.12 $AAB .............................................................................56

2.13 $AAF..............................................................................58

tM-TH8 User Manual, Rev: A1.1 7MH-018-A11

2.14 $AAI............................................................................... 59

2.15 $AAM ............................................................................61

2.16 $AAP..............................................................................62

2.17 $AAPN...........................................................................64

2.18 $AAS1............................................................................66

2.19 ~AAD............................................................................. 68

2.20 ~AADT .......................................................................... 70

2.21 ~AAEV .......................................................................... 72

2.22 ~AAI (Soft INIT command)..........................................74

2.23 ~AAO(Name).................................................................76

2.24 ~AARD ..........................................................................78

2.25 ~AARDVV ....................................................................80

2.26 ~AATnn .........................................................................82

2.27 @AAA2CiToo...............................................................85

2.28 @AAA3Ci...................................................................... 87

2.29 @AAA6CiRrr ................................................................ 89

2.30 @AAA7Ci...................................................................... 91

2.31 @AAGxTtt.....................................................................93

2.32 @AARTTttR(Data) ....................................................... 95

2.33 @AASxTttC(data) ......................................................... 97

2.34 ~**..................................................................................99

2.35 ~AA0............................................................................100

2.36 ~AA1............................................................................102

2.37 ~AA2............................................................................104

2.38 ~AA3EVV....................................................................106

3. Modbus RTU Protocol...........................................................108

3.1 01 (0x01) Read Coil Registers.......................................109

3.2 02 (0x02) Read Input Status ..........................................110

3.3 04 (0x04) Read Input Channels .....................................111

3.4 05 (0x05) Write Single Coil Register............................112

3.5 15 (0x0F) Write Multiple Coil Registers.......................113

3.6 70 (0x46) Read/Write Module Settings.........................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

settings............................................................................117

3.6.4 Sub-function 06 (0x06) Set communication settings

........................................................................................119

tM-TH8 User Manual, Rev: A1.1 7MH-018-A11

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...................................................124

3.6.9 Sub-function 38 (0x26) Set channel enable/disable

........................................................................................125

3.6.10 Sub-function 41 (0x29) Read miscellaneous

settings............................................................................126

3.6.11 Sub-function 42 (0x2A) Write miscellaneous

settings............................................................................127

3.7 Modbus Address Mappings ...........................................128

3.8 Modbus Engineering Data Format Table ......................130

4. Troubleshooting .....................................................................131

4.1 Communicating with the module...................................132

4.2 Reading Data..................................................................133

A. Appendix...............................................................................134

A.1 INIT Mode ....................................................................134

A.2 Dual Watchdog Operation ............................................136

A.3 Frame Ground ...............................................................137

A.4 Reset Status...................................................................138

A.5 Thermistor.....................................................................139

A.6 Resistance Measurement...............................................140

tM-TH8 User Manual, Rev: A1.1 7MH-018-A11

1. Introduction

The tM series is a family of network data acquisition 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.

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-TH8 is an 8-channel thermistor input module

Supported thermistor types are as follows:

tM-TH8 User Manual, Rev: A1.1 7MH-018-A11

1. PreCon Type III, Model 3, 10,000 Ohms at 25°C (77°F)

2. Fenwell Type U, 2000 Ohms at 25°C

3. YSI L Mix, 100 Ohms at 25°C

4. YSI L Mix, 300 Ohms at 25°C

5. YSI L Mix, 1000 Ohms at 25°C

6. YSI B Mix, 2252 Ohms at 25°C

7. YSI B Mix, 3000 Ohms at 25°C

8. YSI B Mix, 5000 Ohms at 25°C

9. YSI B Mix, 6000 Ohms at 25°C

10.YSI B Mix, 10000 Ohms at 25°C

11.YSI H Mix, 10000 Ohms at 25°C

12.YSI H Mix, 30000 Ohms at 25°C

13.User-defined

tM-TH8 User Manual, Rev: A1.1 7MH-018-A11

1.1 More Information

For details of INIT mode operation, please refer to

Section A.1 INIT Mode.

For details of module watchdog and host watchdog,

please refer to Section A.2 Dual Watchdog Operation.

For details of ESD protection and grounding, please

refer to Section A.3 Frame Ground.

There is a way to check whether the module is reset,

please refer to Section A.4 Reset Status for details.

A brief introduction to thermistor is described in

Section A.5 Thermistor.

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: A1.1 7MH-018-A11

1.2 Terminal Assignment

tM-TH8 User Manual, Rev: A1.1 7MH-018-A11

1.3 Specifications

tM-TH8

Analog Input

Input Channels

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

±1%

Zero Drift

+/-20 μV/°C

Span Drift

+/-25 ppm/°C

Open Wire Detection

Yes

Individual Channel

Configurable

Yes

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: A1.1 7MH-018-A11

1.4 Block Diagrams

1.4.1 Block Diagram for the tM-TH8

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