Pilot Communications SPM91 - 8. Communication Protocol

10
Conducted Emissions
EN55022, Class B
Radiated Emissions
EN55022, Class B
8. Communication Protocol
SPM91 support standard Modbus communication protocol, and support 0x03 and 0x10
command. Please refer to below registers list.
Because some data is too long, the device uses two registers to present. And these
data is transits in way of “low byte in the former, high byte in the back”.
Register No.
Definition
Remarks
Real-time data registers (0x03 RO)
40001
Total active energy
× 0.1, unit: kWh
Low byte in the back, high byte in the former.
Range: 0-999999.9
40002
40003
Voltage
× 0.01, unit: V