Mitsubishi MELSEC-Q QD77MS, User Manual

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Chapter 14 Common Functions
Pr.804
Mark detection data buffer memory No.
Set the No. of optional 2 words buffer memory that latched at mark detection.
Set this No. as an even No.
Pr.805
Latch data range upper limit value,
Pr.806
Latch data range lower limit
value
Set the upper limit value and lower limit value of the latch data at mark detection.
When the data at mark detection is within the range, they are stored in "
Md.801
Mark detection data storage area" (1 to 32)
and the "
Md.800
Number of mark detection
counter
" is incremented by 1. The mark detection processing is not executed.
• Upper limit value > Lower limit value
The mark detection is executed when the mark detection data is "greater or equal
to the lower limit value and less than the upper limit value".
t
Upper limit
value Lower limit
value
• Upper limit value < Lower limit value
The mark detection is executed when the mark detection data is "greater or equal
to the lower limit value or less than the upper limit value".
t
Upper limit
value Lower limit
value
• Upper limit value = Lower limit value
The mark detection range is not checked. The mark detection is executed for all
range.