Rockwell Automation 1756-IH16ISOE ControlLogix Sequence of Events Module - Manual (Page 137)

Publication 1756-UM528A-EN-P - April 2004
Using Module Tags D-3
C.CaptureOnOff DINT Enables capturing ON to OFF events on a per point basis. If disabled (i.e., set to 0), that
point will not record timestamp data for ON to OFF input transitions.
0 = CST Capture disabled for ON to OFF input transitions - This option is useful if you
want to avoid using buffer space on the Sequence of Events module for events in which
you have no interest.
1 = CST Capture enabled (default) for ON to OFF input transitions
For more information on Enable CST Capture, see page 5-5.
C.ChatterEvents[16] SINT [16] Number of events required in ChatterTime[16] period to determine a chatter
condition.
0 = Disable Chatter Detection
1 = Illegal value – The number of events must be greater than 1. The maximum value is
127.
For more information on Chatter Detection, see page 5-8.
C.ChatterTime[16] INT [16] Time period, in milliseconds, in which the number of events in the ChatterEvents tag
must occur to declare a chatter condition:
For example, if ChatterEvent = 10 and ChatterTime = 20, and 11 events occur on the
point in a 20ms time period, chatter is declared on the point.
When chatter is declared, the input faults and no longer timestamps transitions that
occur on the point. When chatter ceases, the input returns to normal operation.
The Sequence of Events module considers chatter to have ceased when the configured
chatter time elapses with no transitions occurring on the input.
For more information on Chatter Detection, see page 5-8.
Table D.2 Configuration Tags in CST Per Point Mode
Tag name: Type: Description: