Siemens SIMATIC TI500 Bedienungsanleitung PDF herunterladen (Seite 66)

Modbus Commands

C-17

TIWAY I Gateway User Manual

Code

08 enables diagnostic information to be retrieved to conduct network

testing. This function does not affect the operation of the PLC.

Example:

I000000

Request: 02 08 0000 B405 XXXX

Checksum (XXXX)

Information Field (B405)

Diagnostic code (0000)

Function code (08)

Slave address (02)

Figur

e C-20

Execute

Diagnostics Example — Request

This example shows a request to conduct diagnostic test 0000. This is the

loopback query

, where the outgoing message field is returned unchanged.

I000000

Response: 02 08 0000 B405 XXXX

Checksum (XXXX)

Information Field (B405)

Diagnostic code (0000)

Function code (08)

Slave address (02)

Figur

e C-21

Execute

Diagnostics Example — Response

Code 08 —

Execute

Diagnostics

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