If a gateway is offline for more than 12 hours, and has pending configuration changes, it will enter a “synchronization required” state. The configuration changes will not take effect until the gateway is synchronized.

Synchronize All Gateways

  1. A system-wide banner displays the warning, "Gateway synchronization is required".
  2. From the banner, select Synchronize Now to update all gateways that need to be synchronized.
  3. Select Synchronize to confirm or Cancel to abandon the operation. During synchronization, the downstream devices of the gateways will also be synchronized. The devices will be offline until synchronization is complete.
  4. After Synchronize is selected, "Synchronization in Progress" will display on the Devices tree and gateway details screen.

Synchronize One Gateway

  1. Open the gateway details screen or the select the gateway on the Devices tree. Alternatively, choose the synchronization warning on the dashboard.
  2. Select  and choose the Synchronize option.
  3. When asked to confirm this action, select Synchronize to confirm or Cancel to abandon the operation. During synchronization, the downstream devices of the gateway will also be synchronized.
  4. After Synchronize is selected, "Synchronization in Progress" will display on the Devices tree and gateway details screen.
  5. When all the downstream devices begin their synchronization, the "Synchronization in Progress" status will be removed.

Related Topic

Device statuses and warnings

Controller synchronization




© 2025 Honeywell International Inc. All Rights Reserved.