Rockwell Automation 1756-IH16ISOE ControlLogix Sequence of Events Module - Manual (Page 86)

Publication 1756-UM528A-EN-P - April 2004
6-14 Using The Sequence of Events Module in CST Per Point Mode
Sorting the Data Eventually, you will need to determine the order of events that
occurred in a cascade. You must use a Sort routine to determine the
order of events. Rockwell Automation offers a sample sort routine that
you can use to determine the order of events in an event cascade. For
more information, see Appendix E, Using Sample RSLogix 5000
Projects with the Sequence of Events Module.
Clearing All Data From the
Module’s Buffers At Once If necessary, you can reset the events in the Sequence of Events
module, in effect clearing all data from previously timestamped
transitions. In other words, when all data is cleared from the module’s
buffers, all of the module’s input tags return to 0.
To reset events in the module’s buffer, transition the O.ResetEvents tag
to 1 as described below:
• If the bit = 0, change the bit to 1.
• If the bit = 1, change the bit to 0, wait for at least one RPI, and
change the bit to 1.
Once the data is cleared, the module begins timestamping input
transitions again and storing them in its on-board buffer.
Chapter Summary and
What’s Next In this chapter, you read about using the Sequence of Events module’s
features. Chapter 7 describes Using The Sequence of Events Module in
FIFO Mode.