Tracer Settings Modbus Register 36890: Controller inner Temperature upper limit recover

Technical Definition

The register Controller inner Temperature upper limit recover at address 36890 is used to monitor controller inner Temperature upper limit recover on the Tracer Settings.

• Protocol: Modbus RTU
• Data Type: U WORD
• Unit: °C
• 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 Controller inner temperature upper limit recover (Address: 36890)
# Note: Check if your device uses 0-based or 1-based addressing
result = client.read_input_registers(address=36890, 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: "Controller inner temperature upper limit recover"
  address: 36890
  value_type: U_WORD
  unit_of_measurement: "°C"

Connection Diagram

Here is the standard RS485 wiring for this configuration:

graph TD
    PLC[Host Controller / Home Assistant]
    Device[Tracer Settings]

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

💡 Engineer's Insight

Analysis: Controller internal Temperature (e.g., °C) at which protection is removed and normal operation resumes after overheating.

Troubleshooting: Value is 0: Recovery disabled or sensor issue. Verify controller fan operation and thermal management.