Rockwell Automation 1756-IH16ISOE ControlLogix Sequence of Events Module - Manual (Page 61)

Publication 1756-UM528A-EN-P - April 2004
Using the Sequence of Events Module Features 5-9
Use the Configuration tab in RSLogix 5000 to configure Chatter
Detection, as shown in the example below.
A. Type the number of events.
Range is 2-127 events. Use 0
to disable this feature.
B. Type the time (measured in
milliseconds). You can use up
to 10,000 milliseconds.
In this example, if 5 events
occur on input point 0 within
any 20ms time frame, the
module considers the point to
be chattering.
IMPORTANT
When configuring Chatter Detection, make sure
the time divided by the number of events is greater
than the module’s input filter times. For example,
in the example above the time (20ms) divided by
the number of events (5) = 4. For Chatter
Detection to work properly in this case, make sure
your input filter < 4ms.