If Error/Alarm Led Is On - Panasonic FP E Series User Manual

<For error code is 20 or higher>
• Condition
A self-diagnostic error other than a syntax error has occurred.
• Operation 1
Use the programming tool in PROG. mode to clear the error.
Using FPWIN GR
Click on the "Clear Error" button in the "Status display dialog box". Error code 43 and higher can be
cleared.
• In the PROG. mode, the power supply can be turned off and then on again to clear the error, but all of
the contents of the operation memory except hold type data arecleared.
• An error can also be cleared by executing a self-diagnostic error set instruction F148 (ERR).
• If the mode selector switch has been set to the "RUN" position, the error is cleared and at the same
time operation is enabled. If the problem that caused the error has not been eliminated, it may look in
some cases as though the error has not been cleared.
Key Point:
When an operation error (error code 45) occurs, the address at which the error occurred is stored in
special data registers DT90017 and DT90018. If this happens, click on the "Operation Err" button in the
"Status display dialog box" and confirm the address at which the error occurred before cancelling the
error.

8.2.2 If ERROR/ALARM LED is ON

Condition: The system watchdog timer has been activated and the operation of PLC has been
activated.
Procedure 1
Set the mode selector of PLC from RUN to PROG. mode and turn the power off and then on.
• If the ERROR/ALARM LED is turned on again, there is probably an abnormality in the FPΣ control unit.
Please contact your dealer.
• If the ERROR/ALARM LED is flashed, go to chapter 8.2.1.
Procedure 2
Set the mode selector from PROG. to RUN mode.
• If the ERROR/ALARM LED is turned on, the program execution time is too long. Check the program.
Check
(1)Check if instructions such as "JMP" or "LOOP" are pgrogrammed in such a way that a scan never
finish.
(2)Check that interrupt instructions are executed in succession.
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