A device’s schedules extension is the parent container for imported schedules—components with a ScheduleImportExt. The schedule imports events from the remote station. The imported schedule is read-only (often called a slave schedule). By default, the schedules extension contains a Retry Trigger.
A schedules extension is local to the station, can reside anywhere under the station’s Config node and can be imported by one or more other stations. If you import a schedule from another NiagaraStation or BacnetDevice, it must reside in that device’s Schedules container. Imported schedules are always under a specific device.
The schedules extension can also contain schedule export descriptors. These correspond to local station schedules (often called master schedules) that are exported (pushed) to a remote station. The framework automatically creates a schedule export descriptor when a local schedule is pushed to a remote station.

To view these properties, expand , right-click Schedules and click .
| Property | Value | Description |
|---|---|---|
| Retry Trigger | additional properties | Defines how frequently to attempt a failed operation again. This continues until successful execution occurs.
Appears in the Nav tree but not in any manager view and is unique in that it requires no linking of its output for operation. Getting Started with Niagara documents |
| Subscribe Window | hours minutes seconds (defaults to 24 hours) | Sets up a period of time during which subscription is possible. |