Jk Rs485 Bms10 Modbus Register 4716: Bms10 cell 18 wire resistance

Technical Definition

The register bms10 cell 18 wire resistance at address 4716 is used to monitor bms10 cell 18 wire resistance on the Jk Rs485 Bms10.

• Protocol: Modbus RTU
• Data Type: U WORD
• Unit: Ω
• 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 bms10 cell 18 wire resistance (Address: 4716)
# Note: Check if your device uses 0-based or 1-based addressing
result = client.read_input_registers(address=4716, 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: "bms10 cell 18 wire resistance"
  address: 4716
  value_type: U_WORD
  unit_of_measurement: "Ω"

Connection Diagram

Here is the standard RS485 wiring for this configuration:

graph TD
    PLC[Host Controller / Home Assistant]
    Device[Jk Rs485 Bms10]

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

💡 Engineer's Insight

Analysis: Measures the internal resistance of the wire connecting to BMS10 cell 18. Expected units are milliohms (mΩ) or similar low resistance.

Troubleshooting: Zero reading could imply a short. High reading indicates potential issues like loose connection, oxidation, or damaged wiring.