Kws303L Modbus Register 55: kws name kws measured energy

Technical Definition

The register kws name kws measured energy at address 55 is used to monitor kws name kws measured energy on the Kws303L.

• Protocol: Modbus RTU
• Data Type: U WORD
• Unit: kWh
• 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 kws_name kws_measured_energy (Address: 55)
# Note: Check if your device uses 0-based or 1-based addressing
result = client.read_input_registers(address=55, 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: "kws_name kws_measured_energy"
  address: 55
  value_type: U_WORD
  unit_of_measurement: "kWh"

Connection Diagram

Here is the standard RS485 wiring for this configuration:

graph TD
    PLC[Host Controller / Home Assistant]
    Device[Kws303L]

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

💡 Engineer's Insight

Analysis: Accumulated energy consumed, typically in Kilowatt-hours (kWh). Tracks total consumption.

Troubleshooting: Zero indicates no energy has been consumed or a reset/fault in the meter.