3720 ACM Electronic Power Meter

To successfully communicate with the 3720 ACM Electronic Power Meter, you must:

• Set Register Size to 32 bits in the ACM.
• Set Invalid objects to Yes in the 3720 ACM.
• Use Firmware Version 1.5 or later if you are going to read/write negative numbers.

The Modbus RTU Communications option supports reads and writes from the following memory types on a 3720 Electronic Power Meter operating in 32 bit register size mode:

32 bit Registers	4xxxxor 4xxxxx
32 bit Registers in mod 10000 format	D4xxxx or D4xxxxx