Configure the STT20 BACnet Time Synchronization

Fire events displayed on the management stations are time-stamped by the fire actuation panels. To avoid inconsistencies, the clock of the fire actuation panels must be aligned with the clock on any of the management stations.

  • The management stations and the fire actuation panels are properly set to the same local time zone.
  1. In System Browser, select Project > Field Networks > [BACnet Network] > BACnet.
  1. Click one of the STT20 units.
    NOTE: Only one unit must be synchronized. If you know which of the units is set as Global System Time master, select that unit.
  1. Click the BACnet tab and open the Timing and Status Info expander.
  1. In the Time sync type drop-down list, select UTC.
  1. In the UTC offset field, check that the value matches the time zone of the management station.
  • The UTC offset value is acquired from the fire system. The UTC offset is expressed in minutes, with opposite sign (for example, if the UTC offset is +1 hour, it has to be expressed as -60). You can correct the UTC offset value offline in the fire system tool, then restart or reconnect the fire system, and check the new value acquired.
  1. (Optional) Adjust the time synchronization parameters in the BACnet driver:
  • Depending on whether the driver runs (on the Server or FEP station), select one of the following:
    - Project > Management System > Servers > Main Server > Drivers > [BACnet driver]
    - Project> Management System > FEPs > [FEP] > [drivers folder] > [BACnet driver]
  • Open the Time Synchronization expander, and configure the following:
    - Time sync interval: Set the synchronization delay in minutes. Default is 1440 (24 hours).
    - Align intervals: Select the check box to start the periodic time synchronization on the hour.
    - Interval offset: Set a delay between the Time sync interval and the actual time sync.
  1. Click Save .