Shutdown

Use the Shutdown attribute to determine whether shutdown events are written. The timestamp of Shutdown events normally represents the actual shutdown time of the Data Archive server as recorded by the Snapshot Subsystem.

Beginning with PI Server PR1 SP1, shutdown events for most points are disabled. Unless you configure points to receive shutdown events, only test points such as sinusoid and sinusoidu will receive shutdown events.

• Enable Shutdown to record server shutdown events as point values with the timestamp of the server shutdown. If data is collected on the Data Archive server, shutdown events are helpful to clearly indicate gaps in data collection.

• Disable Shutdown when point data is collected on a distributed collection nodes, as buffering services collect, manage and retain the data until the server is up and running again. Disabled Shutdown PI points have a configurable attribute to determine whether shutdown events are written.

  Note: The default behavior of Data Archive is to write the SHUTDOWN digital state to all PI points when Data Archive is started. The timestamp that is used for the SHUTDOWN events is usually updated every 15 minutes, which means that the timestamp for the SHUTDOWN events will be accurate to within 15 minutes in the event of a power failure.