Sigma - Cannot communicate with an EF1 electricity meter from Meters UK Ltd.

Issue

Cannot communicate with an EF1 electricity meter.

Product Line

Satchwell Sigma

Environment

Modbus

Electricity Meter

EF1

Cause

Cannot communicate with an EF1 electricity meter using Modbus.

Resolution

The settings need to be as follows;

IC-Modbus

Communication settings;

  • Modbus RTU
  • 9600 baud
  • 8 Data bits
  • Even parity
  • 1 stop bit

Fit a 120 ohm resistor across the RS 485 connections

Gateway.txt entry - Point number,9,4,0,1,0x1102,0,0,0

Meter Wiring

  • U+ - Power supply can use 7 - 24 volts dc, but tested using 12v - 15v.
  • B connection to IC3-Modbus Terminal C2
  • A connection to IC3-Modbus Terminal C1
  • GND - Power supply 0v

To review the EF1 data sheet please click HERE.

To download the Windmill ComDebug software, please click HERE, or to get the latest version, register at http://www.windmill.co.uk and download from there.