Meter Chnt Ddsu666 Modbus Register 8202: PF

Technical Definition

The register PF at address 8202 is used to monitor pf on the Meter Chnt Ddsu666.

• Protocol: Modbus RTU
• Data Type: FP32
• 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 PF (Address: 8202)
# Note: Check if your device uses 0-based or 1-based addressing
result = client.read_input_registers(address=8202, 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: "PF"
  address: 8202
  value_type: FP32
  unit_of_measurement: ""

Connection Diagram

Here is the standard RS485 wiring for this configuration:

graph TD
    PLC[Host Controller / Home Assistant]
    Device[Meter Chnt Ddsu666]

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

💡 Engineer's Insight

Analysis: Power Factor (PF) indicates the ratio of real power to apparent power. Unitless. Typically 0 to 1.

Troubleshooting: PF of 0 could mean no active power consumption, a short circuit, or a device malfunction. Check load and wiring.