Issue
Cannot communicate with an EF1 electricity meter.
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.