I am trying to read energy value from siemens relay 7sj8031 relay using modbus rs485 protocol.

Value of energy appearing on relay is 1 MWh

But when i read the address 40205 -40206 using modscan i receive value 5425. I need to know how to scale this value with value 1 MWh which appear on relay

Hello talha123,

please look at this link

https://support.industry.siemens.com/cs/document/109743228/siprotec-compact-7sj80-7sk80-7rw80-communication-module-modbus-bus-mapping-?dti=0&lc=en-WW

at page 31.

There is a description to calculate this value.

I hope this is helpful.

regards
CaOd

I guess it depends on what WpForward is.

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I'm not sure which term WpForward is in the formula for calculating power, KWh (KiloWatt Hours): 

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What is "WpForward"?

Hello, I have the exact same problem but I still can't find how to obtain the correct value. Did you succeed ? If so, how did you do ? Which formula did you use ?

Many thanks !