Troubleshooting Excel 800
EN1B-0375GE51 R0910
74
Alarm LED (red)
Case Alarm LED Meaning Remedy
1 OFF
Normal operation. No action necessary.
2 ON
Watchdog alarm output is powered
– The controller has encountered a
hardware problem
- or -
– The application has a fault
- or -
– The controller has been powered up
without an application or the operator
has manually stopped the application,
e.g., using XL-Online.
In this case, the LED will light up
13 minutes after power-up without
application.
► Try powering down and then
powering up the XCL8010.
► If problem persists, check and – if
necessary – reload the application.
► If problem still persists, replace
hardware.
3 Flashing Although the controller has encountered a
problem, the watchdog alarm output has not
yet been powered.
If problem persists, the LED will become lit
constantly, see case #2.
The controller performs a warm start.
If it happens only once, the controller
has performed a restart.
If, however, it happens multiple times,
then there is an application or hardware
problem (see case #2).
Table 72 XCL8010 alarm LED
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