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Chapter 14 Common Functions
(2) Mark detection control data
Setting item Setting details/setting value
Default
value
Buffer memory address
QD77MS2
QD77MS4
QD77MS16
[Cd.800]
Number of mark
detection clear
request
Set "1" to execute "0" clear of number of mark detections.
"0" is automatically set after completion by "0" clear of
number of mark detections.
1: 0 clear of number of mark detections
Fetch cycle: Operation cycle
0 54640+10k
[Cd.801]
Mark detection
invalid flag
Set this flag to invalidate mark detection temporarily.
1 : Mark detection: Invalid
Others : Mark detection: Valid
Fetch cycle: Operation cycle
0 54641+10k
[Cd.802]
Latch data range
change request
Request the processing of latch data range change.
Set the following value depending on the timing of
updating the change value.
1: Change in the next Operation cycle of the requested
2: Change in the next DI input of the requested
"0" is automatically set after the change is completed.
Fetch cycle: Operation cycle or DI input
0 54642+10k
k: Mark detection setting No.-1
[Cd.800] Number of mark detection clear request
Set "1" to execute "0" clear of "[Md.800] Number of mark detection". "0" is
automatically set after completion by "0" clear of "[Md.800] Number of mark
detection".
[Cd.801] Mark detection invalid flag
Set "1" to invalidate mark detection temporarily. The mark detection signal during
invalidity is ignored.
[Cd.802] Latch data range change request
Request the processing of latch data range change. Set the following value
depending on the timing of updating the change value.
1 : Change in the next Operation cycle of the requested
2 : Change in the next DI input of the requested
• "0" is automatically set after receiving the latch data range change request. (It
indicates that the latch data range change is completed.)
• "[Pr.805] Latch data range upper limit value" and "[Pr.806] Latch data range
lower limit value" at latch data range change request are used as the change
value.
• Restrictions according to the type of latch data range change request are shown
below.
Types of change request
[Cd.801] Mark detection invalid flag
Changing
possibility
1: Change in the next Operation
cycle of the requested
1 : Mark detection: Invalid
Other than 1: Mark detection: Valid
2: Change in the next DI input of
the requested
1 : Mark detection: Invalid
Other than 1: Mark detection: Valid
: Possible, : Not possible