Hi!
I´m trying to read values from several Schneider iEM3250 energy meters, all of them giving me the same problem.
Refer to the manual for modbus info: (https://www.se.com/ww/en/product/A9MEM3250/iem3250-energy-meter---ct---modbus/)
For example, on page 60 there's a list of registers for voltages, starting at 3020 and incrementing by 2.
The document says size:2 and type Float32. Each being 16bit value I suppose which then makes sense.
In citect I connect using the MODBUS1 protocol, and addressing them as Holding, function 4 in citect.
So the addresses are 43020, 43022, 43024 ... etc.
All the phase-phase voltages reads good, but only the first two phase-neutral reads good. The last one reports -nan in runtime. (address 43032).
When using a modbus poll program (AVreporter modbus communication tester) I find that the addresses I read from citect varies a lot in value, while the following address stays quite still.
I suppose when addressing REAL citect combines two bytes into a REAL value?
All the addresses that works has a following value of around 17500, but the non-working address has a value of 65470.
I don´t know, but starting to guess that citect expects a signed INT, but gets an unsigned INT a freaks out?
Anyone got an idea?
Regards
Anders
