Self-Diagnostic Function; Operation Monitor Leds Of Control Unit - Panasonic FP0H User Manual

Troubleshooting

8.1 Self-diagnostic Function

8.1.1 Operation Monitor LEDs of Control Unit

• The control unit has a self-diagnostic function which identifies errors and stops operation if
necessary.
• When an error occurs, the status of the status indicator LEDs on the control unit vary, as
shown in the table above.
 LEDs related to self-diagnostic errors
RUN
(Green)
ON
OFF
In normal
condition
Flashes
(Note 1)
Flashes
(Note 2)
ON
In
OFF
abnormal
condition
OFF
(Note 1): The flashing is repeated every 1 second. (ON for 0.5 seconds ⇔ OFF for 0.5 seconds)
(Note 2): The LEDs flash quickly while upgrading the version. The flashing changes to a slow flashing while rewriting
the version.
8-2
LED display
PROG ERR/ALM
(Green) (Red)
OFF OFF
ON OFF
Flashes
OFF
(Note 1)
Flashes
OFF
(Note 2)
OFF Flashes
ON Flashes
ON ON
Description
Normal operation
Program mode
LED does not flash even if the forcing
output is performed in program mode.
Forcing input/output in RUN mode
RUN and PROG. LEDs flash
alternately.
During version upgrade
Self-diagnostic error (During operation)
Self-diagnostic error (During stop)
System watchdog timer has been
activated
Operation
status
Operating
Stop
Operating
Stop
Operating
Stop
Stop