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 |
Modbus RTU supported memory types. |