Flow Ctrl Tech Engineering

Power Meter Modbus Integration: Polling Voltage, Current, kW & Totalized kWh into SCADA

Practical engineering blueprint for polling electrical energy meters (Schneider PM5350, Socomec, Siemens PAC3200): register tables, scaling multipliers, and CT/PT ratio calculation.

  • Energy meters often output raw integer counts that require multiplication by secondary CT/PT ratios.
  • Accumulated kWh registers should be polled at 1-minute to 15-minute intervals, while instantaneous kW is polled at 1-second intervals.
  • Always verify whether the manufacturer document specifies register addresses in 0-based or 1-based notation.

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