Rockwell Automation Publication ICSTT-RM447M-EN-P - July 2019 45
The AADvance Safety Controller Chapter 2
Technical Features
TUV Approved Operating System
The AADvance system runs an IEC 61508 approved operating system and the
overall system is certified to IEC 61508, Part 1-7: 1998 - 2000 SIL 3.
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 help 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.
Faults in the processor modules are none latching. The controller will recover
automatically and the fault indication will clear once the fault condition has
been removed. Faults in the I/O modules are latched. To clear them a fault
reset signal is sent from the processor module by pressing the Fault Reset
button on the processor module front panel. Field faults are not latched and
will clear as soon as the field fault is repaired.
When the Fault Reset button on each processor module is pressed it attempts
to clear a fault indication immediately, however, the diagnostic systems will
report a serious problem again so quickly there will be no visible change in the
fault status indications.
Remote Fault Reset
Using the Workbench software you can set up a fault reset variable to mimic
pressing the Fault Reset button on the front panel. This feature is provided for
systems located in inaccessible locations. Refer to the AADvance
Configuration Guide Doc No: ICSTT-RM458 for Workbench 2.x; regarding
instructions on how to set up the variable.
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