.Procon.Abb B23 Modbus Register 21616: B23 Export energy L2

Technical Definition

The register B23 Export energy L2 at address 21616 is used to monitor b23 export energy l2 on the .Procon.Abb B23.

• Protocol: Modbus RTU
• Data Type: U QWORD
• Unit: kWh
• 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 B23 Export energy L2 (Address: 21616)
# Note: Check if your device uses 0-based or 1-based addressing
result = client.read_input_registers(address=21616, 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: "B23 Export energy L2"
  address: 21616
  value_type: U_QWORD
  unit_of_measurement: "kWh"

Connection Diagram

Here is the standard RS485 wiring for this configuration:

graph TD
    PLC[Host Controller / Home Assistant]
    Device[.Procon.Abb B23]

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

💡 Engineer's Insight

Analysis: Accumulated energy exported on Phase 2 (L2) by the B23 device. Measured in kilowatt-hours (kWh).

Troubleshooting: Zero value indicates no L2 export, L2 phase missing, or communication issues. Check L2 voltage and wiring.