Publication 1763-RM001C-EN-P - October 2009
532 Protocol Configuration
Modbus Commands
The controller configured for Modbus RTU Slave responds to the Modbus
command function codes listed in below:
Supported Modbus Commands as a Modbus RTU Slave
Command Function Code
(decimal)
Subfunction Code
(decimal)
Read Coil Status 1 -
Read Input Status 2 -
Read Holding Registers 3 -
Read Input Registers 4 -
Write Single Coil
(1)
(1) Broadcast is supported for this command.
5-
Write Single Holding Register
(1)
6-
Echo Command Data 8 0
Clear Diagnostic Counters 8 10
Write Multiple Coils
(1)
15 -
Write Multiple Holding Registers
(1)
16 -
Supported Modbus Commands as a Modbus RTU Master
Command Function Code
(decimal)
Subfunction Code
(decimal)
Read Coil Status 1 -
Read Input Status 2 -
Read Holding Registers 3 -
Read Input Registers 4 -
Write Single Coil
(1)
(1) Broadcast is supported for this command.
5-
Write Single Holding Register
(1)
6-
Write Multiple Coils
(1)
15 -
Write Multiple Holding Registers
(1)
16 -
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