ICP DAS, ZT-2017 and ZT-2017C AI Series User Manual, Version 1.0.1
Page 108
Copyright © 2012 by ICP DAS Co., Ltd. All Rights Reserved.
6.3.2
PLC Address Mapping
Function Code Description
Section
0x01
Reads the Coils
6.3.3
0x02
Reads discrete Inputs
6.3.4
0x03
Reads Multiple Registers
6.3.5
0x04
Reads Multiple Input Registers
6.3.6
0x05
Writes a Single Coil
6.3.7
0x06
Writes Multiple Registers
6.3.8
0x0F
Writes Multiple Coils
6.3.9
0x46
Reads/Writes the Module Settings
6.3.10
If the function specified in the message is not supported, then the module
responds as below. Note that the address mapping for the Modbus protocol
is Base 0.
Error Response
Number Description
Length Value
00
Address
1
1 to 247
01
Function Code
1
Function code + 0x80
02
Exception Code
1
01
Note: If a CRC mismatch occurs, the module will not respond.
