Rockwell Automation 1756-IH16ISOE ControlLogix Sequence of Events Module - Manual (Page 73)

1 Publication 1756-UM528A-EN-P - April 2004
Chapter
6
Using The Sequence of Events Module in
CST Per Point Mode
What This Chapter
Contains This chapter describes how to use the Sequence of Events module
in CST Per Point mode.
Overview of the Mode In CST Per Point mode, the Sequence of Events module can be
configured to timestamp two transitions per input, one in each
direction (OFF to ON and ON to OFF).
When specific points that are Enable CST Capture-enabled
transition (e.g., input 1 is configured so that Enable CST Capture is
enabled for OFF to ON transitions and the input turns ON), the
module timestamps the transition with the current CST value on the
backplane. The module produces data for the owner-controller when
the input filter and chatter detection criteria have been met and at
subsequent RPIs.
Table 6.1
For information on: See page:
Overview of the Mode 6-1
What Are The Typical Applications Where CST Per Point Mode is
Used? 6-4
Configuring the Module for CST Per Point Mode 6-4
Managing the Data in CST Per Point Mode 6-8
Module Sends Data to the Controller 6-8
Copying Relevant Input Data to a Separate Data Structure 6-10
Acknowledging Latched Timestamp Data 6-12
Sorting the Data 6-14
Clearing All Data From the Module’s Buffers At Once 6-14