Troubleshooting
FPΣ User's Manual
264
11.3 ERROR/ALARM LED is Flashing
Chec the error code using the programming tool.
1.
2.
3.
Procedure
1. In online mode: Monitor → PLC Status or
The error code is displayed in the "Self-diagnostic Error" section.
For error codes 20 or higher: a self-diagnostic error other than a syntax error has
occurred.
There are three ways to clear the error:
• Choose [Clear] in the PLC Status dialog box while in PROG mode
• Turn the power supply off/on while in PROG mode (this clears all of the contents of
the operation memory except hold type data)
• Execute the self-diagnostic error set instruction F148_ERR
NOTE
• If the mode selector switch has been set to RUN, the error is cleared and at
the same time operation is enabled. However, the error continues to be
displayed unless the cause of the error has been eliminated.
• When an operation error (error code 45) occurs, the address at which the
error occurred is stored in special data registers DT90017
(sys_iOperationErrorStepHold) and DT90018 (sys_iOperationErrorNonHold).
If this happens, monitor the address at which the error occurred before
cancelling the error.
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