Changing the Baud Rate of an Entire Bus - BCPro - LIT-12011908 - General System Information - BCPro System - 4.0

MS/TP Communications Bus for the BCPro System Technical Bulletin

Brand
BCPro
Product name
BCPro System
Document type
Technical Bulletin
Document number
LIT-12011908
Version
4.0
Revision date
2020-03-16
Language
English

The following procedure represents recovery steps to synchronize the baud rate on the MS/TP bus. You may need to perform this procedure if:

  • the baud rate of the bus supervisor (typically, the BACnet Router) does not match that of the bus

  • you need to change the baud rate of the bus

  • you connect two buses operating at different baud rates

In general, we recommend that you set the bus supervisor ( BACnet Router) to 38,400 baud and set all of the other devices on the bus to Auto.

Note: To change the baud rate of the bus, you need a Bluetooth Commissioning Converter (BTCVT-1), and you need access to the BCPro system UI and the laptop where CCT and the Wireless Utility are installed.
Note: A TEC26xx Thermostat Controller must not be the lowest numbered address on the bus.

To change the baud rate of a bus:

  1. Connect the Bluetooth Commissioning Converter (BTCVT-1) directly to the bus you want to change.

    Important: This procedure disrupts bus communication until completed. Be sure you have connected the Bluetooth Commissioning Converter to the correct bus before proceeding.
  2. Start the Wireless Utility. (Refer to the CCT Bluetooth Technology Communication Commissioning Guide [LIT-12011038] for more information on the Wireless Utility.)

  3. In the BCPro system UI, change all of the devices whose baud rate is manually specified (that is, not set to Auto) to the new baud rate.

    Note: Change the baud rate of the bus supervisor last.
  4. Change the baud rate of all bus repeaters, bus modems, and third-party devices to the new baud rate.

    Note: Devices may appear to go offline as you change baud rates.
  5. In the Wireless Utility, specify the new Baud Rate, select Force New Baud Rate, and click Change. This process takes approximately 3 minutes.

  6. Once the Force New Baud Rate process is complete, access the BCPro system UI and verify the baud rate from the UI and that all devices came online.

    Note: If the old baud rate is still the active baud rate, a device on the bus may still be manually set to use the old baud rate.