.Brink.Base Modbus Register 4041: Brink setpoint outlet volume

Technical Definition

The register brink setpoint outlet volume at address 4041 is used to monitor brink setpoint outlet volume on the .Brink.Base.

• Protocol: Modbus RTU
• Data Type: U WORD
• Unit: m3/h
• 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 brink_setpoint_outlet_volume (Address: 4041)
# Note: Check if your device uses 0-based or 1-based addressing
result = client.read_input_registers(address=4041, 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: "brink_setpoint_outlet_volume"
  address: 4041
  value_type: U_WORD
  unit_of_measurement: "m3/h"

Connection Diagram

Here is the standard RS485 wiring for this configuration:

graph TD
    PLC[Host Controller / Home Assistant]
    Device[.Brink.Base]

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

💡 Engineer's Insight

Analysis: Setpoint for exhaust airflow. Unit: m³/h (cubic meters per hour). Desired extraction rate.

Troubleshooting: Zero indicates ventilation is disabled or setpoint is incorrectly configured.