800m modbus communication
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For Communication of energy meter to AC800M Controller best and easy way is you can use CI853 Modbus Communication Module and between RS485/232 Converter Connected to any one of CI853 Module.
1. In your energy meter you have to set some parameters Such as Baud rate,ID,Parity in the edit mode by putting password many of the meters have 1000 as a password PASS it and change yor desired parameter and PASS it.
2. Converter RS485/232 have to connect the D+,D- pins and output directly via RS232 etherenet port to any one of CI853 Module.
3.USe MBconnect,MBread/write blocks
4.Enter partner,address in format of "%MW10#XX" where XX starts from 00 to Desired map address best refer energy meter memory mapping address probably registers will be float type can use real or other datatype.
5. Seting in Hardware of CI853 module, download program and check MBConnect Valid should be True and MBRead/MBwrite block status=1 meanwhile you can read values in your defined registers.
Hope it Helps Good luck.