Rockwell Automation T80020 Application Note Diagnostic Procedures - Manual (Page 5)

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AN-T80020 Diagnostics Procedure
Issue 12 Feb 11 AN-T80020 5
LED colour Reason Procedure
Processor
'System
Healthy'
LED is not
steady
green
There is a
system fault The 'System Healthy' LED is steady green when the complete system
is healthy. The LED flashes red when there is a fault in the system, or
the processor is not yet initialised.
A fault in the system may be any of a long list of possibilities, but the
processor current log will always show the reason.
Collect the processor’s current system log. The procedure is
described in a section below.
Note that some faults may not show any other LED indication.
Processor
‘Healthy’
LEDs all
steady
green,
System
Healthy
LED
flashing
red, all
other LEDs
off Processor kernel
fault The processor’s foundation operating system has stopped the
processor because of a firmware error. The processor is no longer
running and will not communicate until it is restarted.
If you have just swapped processors, the old processor will always be
stopped using a watchdog timeout kernel fault; in this case remove
the old processor and do not worry.
If you had not swapped processors, this is a serious error and should
be reported to ICS Triplex Technology. Refer to the section below
describing Action on Processor Shutdown. This describes how to
collect diagnostic information which may be lost during attempts to
restart.
Comms
Interface
'Healthy'
LED is not
steady
green
Communications
interface fault If the 'Healthy' LED is flashing red, the module has halted. Remove
and refit the module. The module may have shut down when unable
to cope with a communications situation and may work properly next
time.
If it still fails, obtain a replacement module. Remove the existing
module and insert the replacement (they do not hot swap). The
replacement will automatically load its configuration. Return the faulty
module for repair.
Communications modules from hardware build C will store their
current event log on power loss as the backup log. The backup log
can be collected on the first restart (the procedure is described
below). This will explain the reason for the fault.
System
shut down
when it
should not
have done Further
investigation
needed If the ‘Run’ LED is still flashing and there was no recent intervention,
check if the system has performed a shutdown that it was
programmed to do.
If an online update had just been loaded, and outputs were de-
energised unexpectedly, refer to AN-80009 section 1.12. This
describes a problem with intelligent online updates with Toolset
versions up to and including build 103 (TUV release 3.5).
If the ‘Run’ LED has stopped when it should not have, then the
system has detected a fault of some kind. This should be reported to
ICS Triplex Technology. Refer to the section below describing Action
on Processor Shutdown. This describes how to collect diagnostic
information which may be lost during attempts to restart.