Powmr Inverter 1 Modbus Register 517: Fault Code 2

Technical Definition

The register Fault Code 2 at address 517 is used to monitor fault code 2 on the Powmr Inverter 1.

• Protocol: Modbus RTU
• Data Type: U WORD
• Unit:
• Access: Read Only

How to Read (Python pymodbus)

Use this code snippet to read this specific value via RS485:

from pymodbus.client.sync import ModbusSerialClient

client = ModbusSerialClient(method='rtu', port='/dev/ttyUSB0', baudrate=9600)
client.connect()

# Read Fault Code 2 (Address: 517)
# Note: Check if your device uses 0-based or 1-based addressing
result = client.read_input_registers(address=517, count=2, unit=1)

if not result.isError():
    print(f"Raw Value: {result.registers}")
else:
    print("Error reading register")

client.close()

Integration (Home Assistant)

Paste this into your configuration.yaml:

- platform: modbus_controller
  name: "Fault Code 2"
  address: 517
  value_type: U_WORD
  unit_of_measurement: ""

Connection Diagram

Here is the standard RS485 wiring for this configuration:

graph TD
    PLC[Host Controller / Home Assistant]
    Device[Powmr Inverter 1]

    PLC -- "A+ (D+)" --> Device
    PLC -- "B- (D-)" --> Device
    PLC -- GND --> Device

💡 Engineer's Insight

Analysis: Fault Code 2. Indicates a secondary active fault detected by the inverter. Refer to the manual for specific error codes.

Troubleshooting: Non-zero indicates a fault. Consult the inverter's manual to diagnose and resolve the specific error code. Check if it's related to Fault Code 1.