Narada Npfc Cell Volt Modbus Register volt address: Battery CellVoltagecell

Technical Definition

The register battery CellVoltagecell at address volt address is used to monitor battery cellvoltagecell on the Narada Npfc Cell Volt.

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

Connection Diagram

Here is the standard RS485 wiring for this configuration:

graph TD
    PLC[Host Controller / Home Assistant]
    Device[Narada Npfc Cell Volt]

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

💡 Engineer's Insight

Analysis: Narada battery cell voltage (V). Individual voltage of a specific battery cell.

Troubleshooting: Zero suggests a failed cell, poor connection, or BMS reading error. Inspect cell and connections.