Modbus Driver BM50

This is an interface for the Lennox Climatic AHU. This is a standalone unit and has one unit per slave address. The Read Values are on the Modbus Properties screen and the Write Values are on the Modbus Settings screen.

Modbus Properties Screen: Read Values

Temperatures

• Room: DegC
• Outside: DegC
• Return: DegC
• Supply: DegC

Miscellaneous

• Room Humidity: %
• Damper Position: %
• CO₂: PPM
• Error Code

Modbus Settings Screen: Write Values

Control Data

• Cooling Setpoint: DegC
• Heating Setpoint: DegC
• Min Fresh Air Damper Position: %
• On Off: On or Off