Connection issues

[haralddvorak]

Hi! Thanks for this amazing project and all your efforts you've put into it! I have trouble connecting my inverter and enabled debugging mode in the config file.

My inverter is a SUN2000-10KTL-M1 with a SDongleA-05 SW-Version:V100R001C00SPC123 (latest available version) which is connected via LAN. I'm using a virtual machine with debian 10, with the latest influxdb and grafana.

I can connect and read a register via a small test script using the inverter IP-adress and the port (IP-Address of inverter removed):

from pymodbus.client.sync import ModbusTcpClient as ModbusClient
import time

client = ModbusClient("Edit: IP-Address removed", port=502)
client.connect()

if client.connect():
    time.sleep(1)

    rr = client.read_holding_registers(0x7D50, 0x02, unit=1) #32080 => active_power

    activePowerInv=rr.registers[1]
    print(activePowerInv)

Running main.py shows two errors:

setting params
main 1 error: list index out of range
main 2 error: list index out of range

After fetching the forecast-data the following errors occur:

map looping
read register error Model 1
read register error Model 2
read register error Model 3
read register error Model 4

Starting scanner.py results in errors trying to read the registers like the one below:

DEBUG:pymodbus.transaction:RECV:
DEBUG:pymodbus.framer.socket_framer:Processing:
DEBUG:pymodbus.transaction:Getting transaction 3
DEBUG:pymodbus.transaction:Changing transaction state from 'PROCESSING REPLY' to 'TRANSACTION_COMPLETE'
DEBUG:pymodbus.client.sync:Connection to Modbus server established. Socket ('Edit: IP-Address removed', 54487)
DEBUG:pymodbus.transaction:Current transaction state - TRANSACTION_COMPLETE
DEBUG:pymodbus.transaction:Running transaction 4
DEBUG:pymodbus.transaction:SEND: 0x0 0x4 0x0 0x0 0x0 0x6 0x0 0x3 0x71 0x49 0x0 0x2
DEBUG:pymodbus.client.sync:New Transaction state 'SENDING'
DEBUG:pymodbus.transaction:Changing transaction state from 'SENDING' to 'WAITING FOR REPLY'
DEBUG:pymodbus.transaction:No response received to unbounded read !!!!
DEBUG:pymodbus.transaction:Changing transaction state from 'WAITING FOR REPLY' to 'PROCESSING REPLY'

Would be great if you could help me out or at least point me in any helpful direction.

Thank you very much in advance! Harald

[basking-in-the-sun2000]

Harald,

• I have to push a cleaner display for the first error you showed. It is kind of a minor issue, so I haven't updated the code here. Have a couple of other things that I'm hoping to finish before the next push.

• I think the other error is related to configuration. Did you configure your config.py file?

  • The issue is that you are using unit id 0 in the config file, and the dongle uses id 1.
  • slave = 0x00 # seems the dongle uses 0x01 for the slave id

[haralddvorak]

Thank you for your fast reply and support!

Exactly the unit id was the problem. This seemingly was a misunderstanding on my part! I thought the unit id needs to be different from the dongle id. Now that I have set slave = 0x01 and everything ist working as expected.

Cheers, Harald