integración modbus rtu con EASTRON SDM120

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Key names like Product_code must be in lower case and keys values must be specified in English. Also, register addressing should start from 0: so Voltage address is 0, Frequency address is 70. There's Rtu read test option that you can use to quickly read any register/coil value without having to write a profile. Once you figure out the correct settings you can add them to your profile.
Some more info here: http://openrb.com/docs/modbus.htm