Product Support

Acuvim II Modbus Registers - Scaling Data

The values in the Modbus Registers of the Acuvim II series power meter may not represent the values that are seen from the display of the meter.


Modbus Registers – Scaling Data Details

The values in the Modbus Registers of the Acuvim II series power meter may not represent the values that are seen from the display of the meter.

To convert the raw data read from the Modbus registers a relationship must be applied to the raw values.

The relationship between the raw values in the registers and the parameters can be seen below:

ParametersRelationshipUnit
System ParametersNumerical value equals to communication valueNo unit
Run timeT=Rx/100Hour
ClockNumerical value equals to communication valueUnit of time
Energy (primary)Ep=Rx/10kWh
Reactive Energy (primary)Eq=Rx/10kvarh
Apparent Energy (primary)ES=Rx/10kVA
Energy (secondary)Ep=Rx/1000kWh
Reactive Energy (secondary)Eq=Rx/1000kvarh
Apparent Energy (secondary)ES=Rx/1000kVA
FrequencyF=Rx/100Hz
VoltageU=Rx X(PT1/PT2)/10V
Current, Current DemandI=Rx X(CT1/CT2)/1000A
Power, DemandP=Rx X(PT1/PT2)X(CT1/CT2)W
Reactive Power, DemandQ=Rx X(PT1/PT2)X(CT1/CT2)var
Apparent Power, DemandS=Rx X(PT1/PT2)X(CT1/CT2)VA
Power FactorPF=Rx/1000No unit
Unbalance FactorUnbl=(Rx/1000) X 100%No unit
THDTHD=(Rx/10000) X 100%No unit
HarmonicsHDn=(Rx/10000) X 100%No unit
Total odd HDHDo=(Rx/10000) X 100%No unit
Total even HDHDe=(RX/10000) X 100%No unit
Crest factorCF=Rx/10No unit
K factorKF=Rx/10No unit
THFFTHFF=(Rx/10000) X 100%No unit
Phase anglePhase angle=Rx/10Degree

Note: For meters with RCT, 333mV and mA current input take CT2 as 1.

In order not to manually perform these calculations or program these relationships, the ‘Real-Time Reading’ setting on the meter (S28 Para Mode) needs to be configured to ‘Primary’ so that the values in the Modbus registers is the same value without any scaling required.