Rockwell Automation FactoryTalk Historian SE 3.0 UniInt Interface User Guide - Manual (Page 53)

UniInt Interface User Manual 47
Description:
The Scan Class Bad Value Rate Tag is used to calculate all the bad values being sent to
Historian before exception processing from the device with a status of anything other than
good. This tag can be defined for each scan class and is used for all input tags in that
particular scan class.
Scan Class Scans Skipped
ExDesc Keyword: [UI_SCSKIPPED]
Update Interval: Event driven and each performance summary interval.
 If Location4 is 0, the point monitors the total scans skipped for all of the scan classes.
 If Location4 is greater than 0, Location4 specifies the scan class.
Description:
The Scan Class Scans Skipped tag keeps track of the number of scans that were not
performed before the scan time elapsed and the next scheduled scan executed. The
value of this tag is event driven and updates each time a scan is skipped. The value
written to the Scan Skipped tag is the total number of scans skipped since the last
reporting period. The value of the tag is set to zero at the beginning of each reporting
period.
Scan Class Scan Count
ExDesc Keyword: [UI_SCSCANCOUNT]
Update Interval: At the completion of associated scan class.
 If Location4 is 0, the point monitors the total number of scans for all of the scan classes.
 If Location4 is greater than 0, Location4 specifies the scan class.
Description:
The Scan Class Scan Count tag keeps track of the number of scans that were
performed by the interface since the last reporting period. The value of this tag is
incremented after the completion of every scan. The value of the tag is set to zero at
the beginning of each reporting period.