Modbus with EW11 + Schneider PM3250 energy meter

Configuration
1

Hi, I have a PM3250 (METSEPM3250 - PM3250 power meter - RS485 | Schneider Electric Global) with EW11. Connection is OK. Using Modbus Poll I receive correct data from the meter. On Hassio I tried:

modbus:
- name: ContatoreElettrico
  type: tcp
  host: 192.168.1.120
  port: 502
  sensors:
      - name: Corrente I1
        scan_interval: 30
        address: 3020 
        unit_of_measurement: A
        count: 1 
        data_type: float32

I receive this error:

2022-03-07 12:25:10 DEBUG (SyncWorker_1) [homeassistant.components.modbus.modbus] Pymodbus: ContatoreElettrico: Modbus Error: [Input/Output] No Response received from the remote unit/Unable to decode response
2022-03-07 12:25:10 DEBUG (SyncWorker_6) [pymodbus.client.sync] Connection to Modbus server established. Socket ('192.168.1.192', 51241)
2022-03-07 12:25:10 DEBUG (SyncWorker_6) [pymodbus.client.sync] New Transaction state 'SENDING'
2022-03-07 12:25:13 DEBUG (SyncWorker_6) [homeassistant.components.modbus.modbus] Pymodbus: ContatoreElettrico: Modbus Error: [Input/Output] No Response received from the remote unit/Unable to decode response

192.168.1.192 is Hassio IP.
192.168.1.120 is EW11 IP

The sensor value is a Float32 little endian byte swap

I tried also with

....
        count: 2
        data_type: float32
....

No luck

Any idea?

2
3

Nothing to do. I tried with that parameters, same result. I think something is wrong on my HA configuration, because I have no success with every modbus device.

Anyway I found a solution using Nodered. I get the register values using modbus integration of nodered and pass data to HA

Thanks

4

As you know, is there other HA integration (besides Nodered) that has a modbus library to import data from device?

5

You should try:

      - name: Corrente I1
        scan_interval: 30
        address: 3019 #3020 
        unit_of_measurement: A
        count: 2
        data_type: float

In HA 0x1 = 1

In others modbus 0x1 = 0

6

Also tried. Nothing to do. I tried also with a clean instance of Hassio. Nothing to do. The only way is Nodered. Also with another modbus device I had same problem, but that time I found no solution, even with Nodered. I had to use modpoll.exe on windows and get the output for HA.

Anyway using #3019 register I have

    data = self._check_read_buffer()
  File "/usr/local/lib/python3.9/site-packages/pymodbus/client/sync.py", line 234, in _check_read_buffer
    ready = select.select([self.socket], [], [], end - time_)
2022-03-10 14:44:30 WARNING (MainThread) [homeassistant.components.modbus.validators] Corrente I1  with float is not valid, trying to convert
2022-03-10 14:44:59 ERROR (SyncWorker_5) [homeassistant.components.modbus.modbus] Pymodbus: ContatoreElettrico: Modbus Error: [Input/Output] Modbus Error: [Invalid Message] No response received, expected at least 8 bytes (0 received)
8

hi , may i know how do u connect to the power meter ?