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(5) Turning on the annunciator and processing
(a) Turning on the annunciator
The following instructions can be used.
1) SET F instruction
The SET F instruction can be used to turn on the annunciator only on the leading edge (off to on) of an
input condition.
Even if the input condition turns off, the annunciator is held on.
Using many annunciator numbers can shorten scan time more than using the OUT F instruction.
2) OUT F instruction
The OUT F instruction can be also used to turn on or off the annunciator. However, since the processing is
performed for every scan, the scan time is longer than the case of using the SET F instruction.
In addition, execution of the RST F, LEDR Note9.2, or BKRST instruction is required after the annunciator
is turned off with the OUT F instruction.
Therefore, use of the SET F instruction is recommended.Note2
● If the annunciator is turned on with any instruction other than SET F and OUT F (for example, the MOV
instruction), the same operation as the internal relay (M) is performed.
The ON information is not stored in SM62, and annunciator numbers are not stored in SD62 and SD64 to SD79.
● If annunciator data are sent from the control system to the standby system by tracking of the redundant system, the
annunciator in the standby system does not turn on.
For processing of annunciator data tracking, refer to the following.
QnPRHCPU User's Manual (Redundant System)
Note2
Note9.2
For the Basic model QCPU, the LEDR instruction cannot be used.
Basic
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