Srne Hf2430U60 Modbus Register 545: DC to AC Temperature

Technical Definition

The register DC to AC Temperature at address 545 is used to monitor dc to ac Temperature on the Srne Hf2430U60.

• Protocol: Modbus RTU
• Data Type: S WORD
• Unit: C
• 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 DC to AC Temperature (Address: 545)
# Note: Check if your device uses 0-based or 1-based addressing
result = client.read_input_registers(address=545, 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: "DC to AC Temperature"
  address: 545
  value_type: S_WORD
  unit_of_measurement: "C"

Connection Diagram

Here is the standard RS485 wiring for this configuration:

graph TD
    PLC[Host Controller / Home Assistant]
    Device[Srne Hf2430U60]

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

💡 Engineer's Insight

Analysis: Internal DC-AC inverter operating Temperature in degrees Celsius (°C). Monitors thermal conditions of the inversion stage.

Troubleshooting: Zero or abnormally low readings may indicate sensor failure or lack of operation.