ICP DAS USA tGW-700 Series User Manual page 3

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Table of Contents

Tiny Modbus/TCP to RTU/ASCII Gateway

3.1

Connecting the Power and Host PC ............................................................................ - 24 -

3.2

Configuring Network Settings ..................................................................................... - 25 -

3.3

Connecting the Modbus Devices ................................................................................ - 27 -

3.4

Configuring the Serial Port .......................................................................................... - 28 -

3.5

Self-Test ....................................................................................................................... - 30 -

Web Configuration .................................................................................................................. - 31 -

4.1

Logging in to the tGW-700 Web Server ...................................................................... - 31 -

4.2

Home Page .................................................................................................................. - 33 -

4.3

Network Page .............................................................................................................. - 34 -

4.3.1

IP Address Selection ........................................................................................ - 34 -

4.3.2

General Settings .............................................................................................. - 37 -

4.3.3

Modbus Settings ............................................................................................. - 38 -

4.3.4

Restore Factory Defaults ................................................................................. - 40 -

4.3.5

Update by Ethernet ......................................................................................... - 42 -

4.4

Serial Port Page ........................................................................................................... - 43 -

4.4.1

Settings (Port1 Settings) .................................................................................. - 43 -

4.4.2

Settings (Pair-Connection Settings) ................................................................ - 46 -

4.5

Filter Page ................................................................................................................... - 47 -

4.6

Monitor Page .............................................................................................................. - 48 -

4.7

Password Page ............................................................................................................ - 49 -

4.8

Logout Page ................................................................................................................. - 50 -

Typical Applications ................................................................................................................. - 51 -

5.1

Modbus Gateway ........................................................................................................ - 52 -

5.2

Modbus Net ID ............................................................................................................ - 53 -

5.3

Pair-connection Applications ...................................................................................... - 54 -

5.4

TCP Client Mode Applications ..................................................................................... - 62 -

Modbus Information ............................................................................................................... - 67 -

6.1

Modbus Message Structure ........................................................................................ - 67 -

01(0x01) Read the Status of the Coils (Readback DOs) ........................................................... - 70 -

02(0x02) Read the Status of the Input (Read DIs) .................................................................. - 71 -

03(0x03) Read the Holding Registers (Readback AOs) ............................................................ - 72 -

04(0x04) Read the Input Registers (Read AIs) ........................................................................ - 73 -

05(0x05) Force a Single Coil (Write DO) ................................................................................ - 74 -

06(0x06) Preset a Single Register (Write AO) ......................................................................... - 75 -

15(0x0F) Force Multiple Coils (Write DOs) ............................................................................ - 76 -

16(0x10) Preset Multiple Registers (Write AOs) ............................................................. - 77 -

Appendix A: Troubleshooting .......................................................................................................... - 78 -

A1. How do I restore the web password for the module to the factory default password? .. - 78 -

- 3 -

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ICP DAS USA tGW-700 Series User Manual page 3

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