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5. Modbus Command
The following Function Code commands () are provided for a Modbus master to configure
ACS-20B(W)-MRTU. FC3, FC4, and FC6 are the standard Modbus commands for Modbus
masters to access the Modbus registers. Sub-FC commands of FC100 are manufacturer
assigned commands for parameter settings on the module.
Table 5-1: Modbus Function Code for ACS-20B(W)-MRTU
Function Code
3 (0x03)
4 (0x04)
6 (0x06)
100 (0x64)
ACS-20B(W)-MRTU User Manual
Copyright © 2021 ICP DAS Co., Ltd. All Rights Reserved
Description
Read multiple registers (4xxxx)
Read multiple input registers (3xxxx)
Write single register (4xxxx)
Manufacturer defined function call.
Section
5.1
5.1
5.1
5.2
Version 1.1
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