IO Rate page

The Input IORates Tag page allows users to create, edit and delete the I/O rate point.

An I/O rate point can be configured to receive 10-minute averages of the total number of exceptions per minute that are sent to PI Server by the interface. An exception is a value that has passed the exception specifications for a given PI point. Since 10-minute averages are taken, the first average is not written to PI Server until 10 minutes after the interface has started.

PI ICU currently allows for one I/O rate point to be configured for each copy of the interface that is in use. Some interfaces allow for multiple points for I/O rates.

• Enable I/O Rates for this interface

  This check box enables or disables I/O rates for the current interface. To disable I/O rates for the selected interface, clear the check box. To enable I/O rates for the selected interface, select the check box.

  • Buttons are provided for tasks on the Input IORates Tag page:

    Click Create to create or edit the I/O rate point or to save the new event counter.

    Click Delete to delete a point.

    Click Reset to reset the I/O rate configuration as PI ICU suggests.

    Click Rename to specify a new name for the selected point.

    Click Add to File to add the point to the IORates.dat file with the event counter listed in the Event Counter column.

    Click Suggest a new, unused event counter.

    Click Tag Search to search the PI Server for a previously defined I/O rate point.

    Click Refresh Snapshots to update the snapshot.

• Event Counter

  The event counter correlates a point specified in the IORates.dat file with this copy of the interface. The command-line equivalent is /ec=x, where x is the same number that is assigned to a point name in the IORates.dat file.

• Tagname

  Indicates the name of the I/O rate point.

• Tag Status

  Indicates whether the I/O rate point exists in PI Server. The possible states are:

  • Created

    Indicates that the point exists.

  • Not Created

    Indicates that the point does not exist.

  • Deleted

    Indicates that a point existed, but was just deleted by the user.

  • Unknown

    Indicates that the PI ICU cannot access the PI Server.

• In File

  Indicates whether the I/O rate point listed in the Tagname field and the counter indicated in the Event Counter field is in the IORates.dat file. The possible states are:

  • Yes

    This status indicates that the point name and event counter are in the IORates.dat file

  • No

    This status indicates that the point name and event counter are not in the IORates.dat file

• Snapshot

  If the I/O rate point exists, the snapshot value is displayed in the Snapshot column.