Hi,

I am trying to read the ABB DMTME power analyzer with MODBUS Poll. i am getting data as i requested from the DMTME meter. but i need to read kwh, Hz. there i am getting some value, but i cannot match them with the actual values on the meter. references are as follows:

103Eh 2 3-PHASE SYS. ACTIVE ENERGY Wh * 100 Unsigned Long
1040h 2 3-PHASE S. REACTIVE ENERGY
VArh * 100 Unsigned Long
1046h 2 FREQUENCY
mHz
Unsigned Long

Thanks

 

1) They are all "unsigned long integers": two Modbus registers or 4 bytes or 32 bits. You're sure you're looking at all 32 bits?

2) If your addressing is off by one, then you might be reading one register from long integer at 103Ch and one register from the long integer at 103Eh, which won't make sense when they're joined together.

For 103E, try reading one address lower 103D or one address higher, 103F and see if that provides the correct value for 103E.

If adding or subtracting one works, do it for all the addresses.