Rockwell Automation T80020 Application Note Diagnostic Procedures - Manual (Page 6)

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AN-T80020 Diagnostics Procedure
Issue 12 Feb 11 AN-T80020 6
LED colour Reason Procedure
A comms
interface
port is not
showing
LED
activity
No comms Serial ports should be flickering red/green or yellow if active.
Ethernet ports should be flickering red/green or yellow if active and
steady green or off when inactive.
Flickering red or green only indicates one way communications. Red
is transmit, green is receive.
If communications has previously been successfully commissioned,
check the communications path for cable faults etc. Refer to the
8151B Communications Module PD for information on
communications module settings.
Expander
Interface
module
'Healthy'
LED not
steady
green Module fault Obtain a replacement module. Swap to the replacement module.
Return the faulty module for repair.
A table of further diagnostics is given in PD-8311.
Expander
Processor
module
'Healthy'
LED not
steady
green Module fault Obtain a replacement module. Swap to the replacement module.
Return the faulty module for repair.
A table of further diagnostics is given in PD-8310.
Expander
Processor
Tx/Rx
LEDs not
flickering
yellow No comms These three LEDs monitor the communications on the three cables
from the Expander Interface. Note that no communications will be
shown whilst the Expander Processor is in Standby, the Expander
Interface is not operating or the system is starting up. If one
communications link LED is off, check the cable and connections for
that link.
I/O module
'Healthy'
LED
flashing
red A fault has been
detected on the
slice but the
slice is still
operating Collect the error code using the Toolset debugger, as described in a
section below. Look up the advice in the Error Code Descriptions
below. Note the fault code, module reference, date and time in a log
book and press Reset.
I/O module
'Healthy'
LED
steady red
A slice of the
triplicated
module has
been set offline
and has been
disconnected. You cannot clear these faults or restart the slice by pressing Reset.
You cannot get any logs from this slice without restarting it.
Obtain a replacement module of the same or later build. Swap to the
replacement module. Remove the faulted module.
Insert the faulted module into an unused slot (one for which scanning
is not disabled in the system configuration, but which is not
connected to an I/O cable or hot-swap cable).
If the slice fails to start, return the faulty module for repair.
If the faulted slice starts, collect the I/O module log from that slice
(described in a section below). Read the end of the log for error
codes. Look up the advice in the Error Code Descriptions below.
I/O module
Channel
LEDs are
not off or
steady
green Field fault Channel LED settings are system specific and may be configured in
the System Configuration. Check the meaning of the LED colour and
investigate the channel wiring.