
7. MODBUS
IMS01T28-E4
7-10
7.2.3 Diagnostics (Loopback test) [08H]
The master’s query message will be returned as the response message from the slave.
This function checks the communication system between the master and slave.
Example:
Loopback
test for slave address 1
Query message
Slave address
01H
Function code
08H
Test code
High
00H
Low
00H
Data
High
1FH
Low
34H
CRC-16 High
E9H
Low
ECH
Normal response message
Slave address
01H
Function code
08H
Test code
High
00H
Low
00H
Data
High
1FH
Low
34H
CRC-16 High
E9H
Low
ECH
Error response message
Slave address
01H
80H
Function code
88H
Error code
03H
CRC-16 High
06H
Low
01H
Test code must be set to 00.
Contents will be the same as query message data.
Any pertinent data
Summary of Contents for Z-TIO-G
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Page 16: ...IMS01T28 E4 1 8 MEMO...
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Page 34: ...4 MOUNTING 4 4 IMS01T28 E4 4 2 Dimensions Terminal type module 85 100 5 Unit mm 30 6 7...
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Page 211: ...TROUBLE SHOOTING IMS01T28 E4 10 1 10 1 Solutions for Problems 10 2...
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Page 217: ...SPECIFICATIONS IMS01T28 E4 11 1...
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Page 245: ...The first edition SEP 2012 IMQ00 The fourth edition FEB 2019 IMQ00...