Esphome Web 10C200 Modbus Register 3022: 43023 Supply fan power

Technical Definition

The register 43023 Supply fan power at address 3022 is used to monitor 43023 supply fan power on the Esphome Web 10C200.

• Protocol: Modbus RTU
• Data Type: U WORD
• Unit: W
• 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 43023 Supply fan power (Address: 3022)
# Note: Check if your device uses 0-based or 1-based addressing
result = client.read_input_registers(address=3022, 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: "43023 Supply fan power"
  address: 3022
  value_type: U_WORD
  unit_of_measurement: "W"

Connection Diagram

Here is the standard RS485 wiring for this configuration:

graph TD
    PLC[Host Controller / Home Assistant]
    Device[Esphome Web 10C200]

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

💡 Engineer's Insight

Analysis: Supply fan electrical power consumption in Watts. Measures energy used by the supply fan.

Troubleshooting: Zero means fan is off, has electrical fault, or control signal is absent.