Mac Address And Bacnet Device Instance Number - Carrier ComfortVu TB-24-HM Installation And Operation Manual

MAC Address and BACnet Device Instance Number

MAC Address
To set the communication MAC Address:
1. Adjust the setpoint temperature to 11ºC or 52ºF.
2. Press and hold the [C/F] button for 10 seconds to enter MAC Address configuration mode.
3. Use the [+] or [-] buttons to define the MAC Address (range 1...127).
MAC Address
4. When finished, press the [On/Off] button and readjust the setpoint.
1...127
5. Switch power supply off and on again for the MAC address changes to take effect.
Caution: Do not use the same MAC address for two devices on the same communication line!
BACnet Device Instance Number
By default, the BACnet Device Instance Number is generated automatically by the thermostat (Vendor ID + MAC address).
For example, Carrier's vendor ID is 16, and if the MAC address is 075, the BACnet Device Instance Number is 16075.
Note: If you change the MAC address, you must cycle the thermostat's power to reset the BACnet Device Instance Number.
You can override the automatically-generated BACnet Device Instance Number using the i-Vu application, an Analog Network
Output microblock in a control program, or some other BACnet utility. Write the new BACnet Device Instance Number to the
present_value property of Analog Value 42 (BACnetDeviceInstanceNumber).
Examples:
In the i-Vu application
1. Use the BACnet Discovery feature to discover the BACnet Thermostat and its BACnet objects.
2. In the navigation tree, select the Analog Value called BacnetDeviceInstanceNumber.
3. Change the Present Value field (shown below) to the desired BACnet Device Instance Number.
4. Click Accept.
In an Analog Network Output microblock
To change the BACnet Device Instance Number to 24113, the microblock's address would be:
bacnet://16075/AV:42/present_value, or
bacnet://16075/BACnetDeviceInstanceNumber
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