Device Jkpb0116 Modbus Register 4776: Name bms name capacity remaining

Technical Definition

The register name bms name capacity remaining at address 4776 is used to monitor name bms name capacity remaining on the Device Jkpb0116.

• Protocol: Modbus RTU
• Data Type: U DWORD
• Unit: Ah
• 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_capacity_remaining (Address: 4776)
# Note: Check if your device uses 0-based or 1-based addressing
result = client.read_input_registers(address=4776, 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_capacity_remaining"
  address: 4776
  value_type: U_DWORD
  unit_of_measurement: "Ah"

Connection Diagram

Here is the standard RS485 wiring for this configuration:

graph TD
    PLC[Host Controller / Home Assistant]
    Device[Device Jkpb0116]

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

💡 Engineer's Insight

Analysis: Remaining capacity (Ah). The amount of charge (in Ampere-hours) still available in the battery. Reflects the usable energy left.

Troubleshooting: Zero capacity means the battery is fully discharged. Unexpected values can indicate calibration problems or battery degradation.