Data Handling

From the UniInt page, use settings in the Data Handling pane to the right to queue data, select bypass exceptions, and write status to tags on shutdown.

• Queue data (for active interfaces)

  The Queue data setting tells the interface whether to queue up events before putting the data into the PI System.

  The Queue option causes the interface to be more efficient if the interface is on a separate computer from the PI Server. However, it will slightly delay the update of the snapshot value if the data rate is low. The buffer size of the event queue for the interface is 128 events.

  The command line equivalent for enabling this option is /q.

  Starting with UniInt version 4.4.0.14, the Queue option is the default behavior for active interfaces and cannot be selected. The choice is disabled.

• Bypass exception

  Selecting the Bypass exception check box tells the interface to ignore the exception specifications of the PI point and put all the input events into the PI Snapshot. By default, this option is disabled in order to reduce data traffic.

  The command-line equivalent for enabling this option is /sn.

• Write status to tags on shutdown

  The stop status setting indicates whether a digital state value is written to a PI point when the interface stops.

  The list is populated with the states in the system digital state set from PI Server. If the Write status to tags on shutdown check box is selected, but no system digital state is entered into the text box, then the system digital state Intf Shut is written to all PI points belonging to this interface when the interface stops.

  If the check box is selected and a valid system digital state is entered, then that system digital state is written to all PI points belonging to this interface when the interface stops. A digital state named Intf Shut should be added to the system digital set and specified in this text box.

  The command line equivalent is /stopstat or /stopstat=x, where x is the system digital state to be written to all PI points.