Mitsubishi Electric MELSEC iQ-R Series User Manual page 334

Operation for mark detection function
Operations done at mark detection are shown below.
• Calculations for the mark detection data are estimated at leading edge/trailing edge of the mark detection signal. However,
when the specified number of detections mode is set, the current number of mark detection is checked, and then it is
judged whether to execute the mark detection.
• When a mark detection data range is set, it is first confirmed whether the mark detection data is within the range or not.
Data outside the range are not detected.
• The mark detection data is stored in the mark detection data storage area according to the mark detection mode, and then
the number of mark detection is updated.
■Continuous detection mode
Mark detection signal
(Leading edge detection setting)
Mark detection data value
[Md.801] Mark detection data
storage area (1 to 32)
[Md.800] Number of mark
detection
[Pr.42] External command
function selection
[Cd.8] External command valid
■Specified number of detection mode (Number of detections: 2)
Mark detection signal
(Leading edge detection setting)
Mark detection data value
[Md.801] Mark detection data storage
area (1 to 32) (1st area)
[Md.801] Mark detection data storage
area (1 to 32) (2nd area)
[Md.800] Number of mark detection
[Pr.42] External command function
selection
[Cd.8] External command valid
9 COMMON FUNCTIONS
332
9.7 Mark Detection Function
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Confirmation of mark detection data range
(Upper/lower limit value setting: Valid)
Real current value
(Continuous update)
Detected real current value
0
**
"0" clear by setting "1" in "[Cd.800] Number of mark detection clear request"
0
Set "1" before mark detection start.
Confirmation of mark detection data range
(Upper/lower limit value setting: Valid)
0
**
"0" clear by setting "1" in "[Cd.800] Number of mark detection clear request"
0
Set "1" before mark detection start.
search engine
Data outside range is not latched.
Detected real current value
1 2
4: High speed input request
1
Real current value
(Continuous update)
Detection real current value (1st)
Detection real current value (2nd)
1
4: High speed input request
1
Mark detection is not executed because
the number of mark detections is already 2
(More than the specified number of detections).
2