Rockwell Automation Publication ICSTT-RM448J-EN-P - April 2018
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The AADvance Safety Controller
Chapter 2
Each I/O module has a dedicated response line which returns to the processor.
The unique response line for each I/O module supplies an unambiguous
identification of the source of the I/O data and assists with fault containment.
Internal Diagnostics and Fault Reset
The AADvance controller contains comprehensive internal diagnostic systems
to identify faults that occur during operation and trigger warnings and status
indications. The diagnostic systems run automatically and test the system for
faults related to the controller, and field faults related to field I/O circuits.
Serious problems are reported immediately, but faults that are not on non-
critical items are filtered to prevent spurious alarms. The diagnostic systems
monitor such items at regular times, and need a number of occurrences of a
possible fault before reporting it as a problem.
The diagnostic systems use simple LED status indications to report a problem.
The LED indications identify the module and can also identify the channel
where the fault has occurred. There is also a summary system healthy
indication for all of the controller. The application software uses its variable
structures to report a fault problem; these variables give status reports and are
configured using the AADvance Workbench.
