Parameters > Citect.ini File Parameters > SPC Parameters > [SPC]AlarmBufferSize


Specifies the number of subgroups used in SPC Alarm calculations.

Note: You may find it useful to make the AlarmBufferSize the same as number of subgroups displayed on your SPC charts, so that any SPC alarms directly correlate with those charts.

The following shows the number of subgroups displayed on the standard SPC templates for the given resolutions:

VGA - 39

SVGA - 52

XGA - 58

SXGA - 76

Allowable Values: 1 to 200

Default Value: 39 (standard VGA template)

See Also