Rockwell Automation AADvance Controller Troubleshooting and Maintenance Manual - Manual (Page 27)

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Document: 553634
(ICSTT-RM406F_EN_P) Issue: 089:
3-5
 System fault, pertaining to the AADvance system
 Module fault, pertaining to a particular module
 Channel fault, pertaining to the circuits inside an I/O module or TA serving a
particular channel
 Field fault, pertaining to the field loop wiring outside the I/O module and TA
serving a particular channel
A channel fault produces a module fault and similarly a module fault produces a system fault.
The diagnostic systems use some of the status indicators (LEDs) on the controller modules to show
the presence of a fault. The indicators show the location and where possible the nature of a fault, and
provide the information you need to locate the problem. The following groups of status indicators can
show faults:
 The System Healthy LED on each processor module
 The Healthy LED on each processor and I/O module
 The Channel LED on each I/O module
The relationships between the classes of faults and the status indicators are as shown.
System Fault
The controller indicates system fault when it detects a fault associated with itself rather than a field
condition or a field device. Such a fault may be any of the following: