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Failure Diagnosis Instructions Section 3-28
Clearing Non-fatal Errors without the CX-Programmer
1. Clearing User-defined Non-fatal Errors
When FAL(006) is executed with N set to 0, non-fatal errors can be cleared.
The value of S will determine the processing, as shown in the following ta-
ble.
2. Clearing Non-fatal System Errors
There are two ways to clear non-fatal system errors generated with
FAL(006).
• Turn the PLC OFF and then ON again.
• When keeping the PLC ON, the system error must be cleared as if the
specified error had actually occurred.
Flags
The following tables show relevant words and flags in the Auxiliary Area.
• Auxiliary Area Words/Flags for User-defined Errors Only
• Auxiliary Area Words/Flags for System Errors Only
S Process
&1 to &511 (0001 to 01FF hex) The FAL error of the specified number will be
cleared.
FFFF hex All non-fatal errors (including system errors) will
be cleared.
0200 to FFFE hex or word
specification
The most serious non-fatal error (even if it is a
non-fatal system error) that has occurred.
When more than one FAL error has occurred,
the FAL error with the smallest FAL number will
be cleared.
Name Label Operation
Error Flag ER ON if N is not within the specified range of 0 to 511 deci-
mal.
ON if a non-fatal system error is being generated, but the
specified error code or error details code is incorrect.
OFF in all other cases.
Name Address Operation
FAL Error Flag A402.15 ON when an error is generated with
FAL(006).
Executed FAL Num-
ber Flags
A360.01 to
A391.15
When an error is generated with FAL(006),
the corresponding flag will be turned ON.
Flags A360.01 to A391.15 correspond to FAL
numbers 0001 to 01FF.
Name Address Operation
System-generated
FAL/FALS number
A529 A dummy FAL/FALS number is used when a
system error is generated with FAL(006). Set
the same dummy FAL/FALS number in this
word (0001 to 01FF hex, 1 to 511 decimal).
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