Genvex Optima 270 Modbus Register 1: Raw T3 air intake

Technical Definition

The register Raw T3 air intake at address 1 is used to monitor raw t3 air intake on the Genvex Optima 270.

• Protocol: Modbus RTU
• Data Type: S WORD
• Unit:
• 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 Raw T3 air intake (Address: 1)
# Note: Check if your device uses 0-based or 1-based addressing
result = client.read_input_registers(address=1, 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: "Raw T3 air intake"
  address: 1
  value_type: S_WORD
  unit_of_measurement: ""

Connection Diagram

Here is the standard RS485 wiring for this configuration:

graph TD
    PLC[Host Controller / Home Assistant]
    Device[Genvex Optima 270]

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

💡 Engineer's Insight

Analysis: Measures the raw Temperature of the incoming air in degrees Celsius (°C). Reflects ambient or pre-conditioned air entering the system.

Troubleshooting: 0°C could signify a sensor fault, open circuit, or an unusually cold environment if the sensor is otherwise functional.