938
Failure Diagnosis Instructions Section 3-28
2. The Executed FAL Number Flag will be turned ON for the corresponding
FAL number. Flags A360.01 to A391.15 correspond to FAL numbers 0001
to 01FF (1 to 511).
3. The error code will be written to A400. Error codes 4101 to 42FF corre-
spond to FAL numbers 0001 to 01FF (1 to 511).
Note If a fatal error or a more serious non-fatal error occurs at the same
time as the FAL(006) instruction, the more serious error’s error
code will be written to A400.
4. The error code and the time that the error occurred will be written to the
Error Log Area (A100 through A199).
Note The error record will not be written to the Error Log Area if the PLC
Setup has been set so that errors generated by FAL(006) are not
recorded.
5. The ERR Indicator on the CPU Unit will flash.
6. If a word address has been specified in S, the message beginning at S will
be registered (displayed on the Programming Device).
The following table shows the error codes and FAL Error Flags for FAL(006).
Displaying Messages with Non-fatal User-defined Errors
If S is a word address and an ASCII message has been stored at S, that mes-
sage will be displayed at the Programming Device when FAL(006) is exe-
cuted. (If a message is not required, set S to a constant.)
The message beginning at S will be registered when FAL(006) is executed.
Once the message is registered, it will be displayed when the Programming
Device is connected.
An ASCII message up to 16 characters long can be stored in S through S+7.
The leftmost (most significant) byte in each word is displayed first.
The end code for the message is the null character (00 hexadecimal). All 16
characters in words S to S+7 will be displayed if the null character is omitted.
If the contents of the words containing the message are changed after
FAL(006) is executed, the message will change accordingly.
FAL number FAL error codes Executed FAL Number Flags
1 to 511 decimal 4101 to 42FF A360.01 to A391.15
FAL Error Flag ON
Corresponding Executed FAL Number Flag ON
Error code written to A400
Error code and time written to Error Log Area
ERR Indicator flashes
Message displayed on
Programming Device
Execution of
FAL(006)
generates a
non-fatal er-
ror with FAL
number N.
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