Rockwell Automation T80020 Application Note Diagnostic Procedures - Manual (Page 26)

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AN-T80020 Diagnostics Procedure
Issue 12 Feb 11 AN-T80020 26
Other data from the I/O modules is available under the Data branch.
• Channel Data is useful for comparing the measurements or states of the three slices. Note
that log data collection results in snapshots from the three slices at different times, so
differences may just reflect changing channel states.