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SEVERE FAILURE ALARM: FALS(007)
(007)
FALS
N
M
M: 1
st
message wordCIO, G, A, #, DM
N: FAL number
001 to 511
Operand Data Areas
Ladder Symbol
FAL(006) and FALS(007) are provided so that the programmer can output error
numbers and messages for use in operation, maintenance, and debugging.
When executed with an ON execution condition, the FAL(006) instruction will
turn ON the bit in the Auxiliary Area that corresponds to the FAL number. Bits
A43001 to A46115 correspond to FAL numbers 001 to 511. FAL number 000 is
used to reset FAL errors (see below).
When executed with an ON execution condition, both FAL(006) and FALS(007)
cause an error code to be output to A400. The error code identifies the FAL num-
ber (FAL(006) and FALS(007) use the same FAL numbers) and whether the er-
ror is an FAL or FALS error, as shown in the table. If an error occurs that is more
serious than the one recorded in A400 (including errors other than those gener-
ated with FAL(006) and FALS(007)), the new error code will replace the previous
one. The system also outputs error codes to A400. Refer to Section 6 Trouble-
shooting in the CVM1D PCs Installation Guide for details on error code priority.
FAL number
FAL error code
FALS error code
001
4101
C101
002
4102
C102
.
.
.
.
.
.
.
.
.
511
42FF
C2FF
When FAL(006) is executed with an ON execution condition, the FAL Instruction
Flag (A40215) will be turned ON, and the ALARM indicator on the front of the
CPU will light, but PC operation will continue. When FALS(007) is executed with
an ON execution condition, the FALS Instruction Flag (A40106) will be turned
ON, the ERROR indicator will light, all outputs will be turned OFF, and PC opera-
tion will stop.
Operand M determines whether or not a message will be output to the CVSS
when an FAL(006) or FALS(007) instruction is executed. If M is input as a num-
ber (#0000 to #FFFF), the message function is disabled. If M is an address, it is
the leading address of an 8-word table containing a 16-character ASCII mes-
sage. Refer to 5-34-3 DISPLAY MESSAGE: MSG(195), for information on the
format for the message data. If the contents of words M to M+7 are changed after
an FAL(006) or FALS(007) instruction is executed, the message will also be
changed.
FAL errors can be cleared by executing the FAL(006) instruction with N equal to
000, or from the CVSS. FALS errors can be cleared from the CVSS or turning the
power OFF and ON after first correcting the cause of the error.
When FAL(006) is executed with N=000 and M equal to an FAL number (0001 to
0511), both the error code in A400 and the bit between A43001 and A46115 cor-
responding to the FAL number in M will be reset.
When FAL(006) is executed with N=000 and M equal to FFFF, all non-fatal errors
will be cleared, i.e., all errors that don’t stop PC operation will be cleared, and
words A400 and A430 to A461 will be reset.
N must be between 000 and 511 for FAL(006) or between 001 and 511 for
FALS(007).
Description
Resetting Errors
Precautions
Special Instructions
Section 5-27
Содержание CVM1D
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