SQC Alarms tool

The SQC Alarms tool displays SQC alarm points on all connected Data Archive servers.

• To retrieve and display SQC alarms, click the Search button . You can filter your search results and retrieve only specific tags by entering a search mask in the Tag Mask field. For example sqc* would load all alarms beginning with the letters sqc. The default mask is *, which loads all alarms.

• To refresh the current values of all listed SQC alarms and their associated points, click the Refresh button or press F5.

• Note: If you have many alarm points and you want to display values more quickly, use Shift+click or Ctrl+click to select only the alarms you want to refresh.

The list displays properties of each alarm point in several columns:

• Alarm Name: The tag name of the SQC alarm point.

• PI Server: The server where the alarm point resides.

• Alarm Status: The current point value of the SQC alarm.SQC alarm point values represent alarm status based on whether a source point has passed or failed one or more SQC pattern tests.

• Possible alarm values are listed in the pisqcalarm digital state set and discussed in the Applications User Guide.

• Value of Source: The current value of the source point monitored by the SQC alarm.

  Note: The value of source changes based on chart type.

• UCL: The value of the upper control-limit point, used in alarm calculations.

• CL: The value of the center-line point, used in alarm calculations.

• LCL: The value of the lower control-limit point, used in alarm calculations.

• Execution State: The current value of the reset point monitored by the SQC alarm, which tells SQC Alarm Subsystem whether the alarm should be running normally, placed on hold, or whether alarm is in a transitional state. An example of a transitional state is Alarm-On; this state indicates that the alarm had been placed in hold, but has been turned on again and is waiting for a new source tag event.

• Description: The descriptor attribute of the SQC alarm point.