Device Jkpb1732 Modbus Register 4662: Name bms name cell voltage 28

Technical Definition

The register name bms name cell voltage 28 at address 4662 is used to monitor name bms name cell voltage 28 on the Device Jkpb1732.

• 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 name_bms_name_cell_voltage_28 (Address: 4662)
# Note: Check if your device uses 0-based or 1-based addressing
result = client.read_input_registers(address=4662, 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: "name_bms_name_cell_voltage_28"
  address: 4662
  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[Device Jkpb1732]

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

💡 Engineer's Insight

Analysis: Voltage of the 28th battery cell. Units: Volts (V).

Troubleshooting: Could indicate a faulty cell, loose connection, or BMS internal fault if readings are abnormal or zero.