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Publication 1763-RM001B-EN-P - April 2007
366
Communications Instructions
Modbus Command
The controller supports eight Modbus commands. If the target device
supports any of these Modbus command types, the controller should be
capable of exchanging data with the device. Supported Modbus
commands include:
Modbus Command Types
Modbus Command
Used For
01 Read Coil Status
reading bits
02 Read Input Status
reading bits
03 Read Holding Registers
reading words
04 Read Input Registers
reading words
05 Write Single Coil
writing 1 bit
06 Write Single Register
writing 1 word
15 Write Multiple Coil
writing multiple bits
16 Write Multiple Registers
writing multiple words
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