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2 Instructions
CP1E CPU Unit Instructions Reference Manual(W483)
Failure Diagnosis Instructions
2
FALS
Sample program
Generating a User-defined Error
When CIO 0.00 is ON in the following example, FALS(007) will generate a fatal error with FAL number
31 and execute the following processes.
1. The FALS Error Flag (A401.06) will be turned ON.
2. The corresponding error code (C11F) will be written to A400.
3. The error code and the time/date that the error occurred will be written to the Error Log Area (A100
through A199).
4. The ERR Indicator on the CPU Unit will be lit.
5. The ASCII message in D100 to D107 will be displayed at the Peripheral Device.
Note If a message is not required, specify a constant for S.
Note A400 will contain the error code of the most serious of all of the errors that have occurred, including non-fatal
and fatal system errors, as well as errors generated by FAL(006) and FAL(007).
Generating a Non-fatal System Error
When CIO 0.00 is ON in the following example, FALS(007) will generate Memory Error (User programe
Error). In this case, dummy FAL number 10 is used and the corresponding value (80F1 hex) is stored in
A529.
1. The specified error code (80F1) will be written to A400 if it is the most serious error.
2. The error code and the time/date that the error occurred will be written to the Error Log Area (A100
through A199).
3. The Memory Error Flag (A401.15) will be turned ON.
4. The CPU Unit’s ERR Indicator will light and PLC operation will stop.
5. Memory Error has occured.
M: D100
MESSAGE
LOW VOLTAGE
15 0
57
56
4C
41
45
4C 4F
20
4F
54
47
00
M
N
0.00
D101
D102
D103
D104
D105
D106
D107
Disregarded
31
D100
FALS
MOV
#000A
A529
000AA529CH
S: D200
D201
#80F1
#0001
0.00
FALS
10
D200
N
S
Matching
values
......
Error code: #80F1 (Memory Error Flag)
......
Memory Error generating Area: #0001(User Memory)