Instruction Manual

52 Rockwell Automation Publication 1408-UM001D-EN-P - September 2013
Chapter 4 Communications Command Summary
Modbus RTU Serial and
Optional Modbus/TCP
Ethernet
The power monitor does not initiate Modbus commands but responds to
commands sent by the Modbus master. These Modbus function codes are
supported.
• 03 Read Holding Registers
• 04 Read Input Registers
• 16 Write Multiple Holding Registers
• 08 Diagnostics
– 00 Echo Command Data
– 02 Return Diagnostic Counters
– 10 Clear Diagnostic Counters
• 06 Write Single Holding Register