Operations - Mitsubishi Electric MELSEC iQ-R16MTCPU Programming Manual

Operations

Operations done at mark detection are shown below.
• Calculations for the mark detection data are estimated at leading edge/trailing edge/both directions of the high-speed input
request signal. However, when the Specified Number of Detection mode is set, the current mark detection is checked
against the counter value for number of mark detections and then it is determined whether or not to latch the current
detection data.
• 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 first device of the mark detection data storage area according to the mark detection
mode, and then the number of mark detections counter is updated.
Operation examples for each mode are shown below.
Continuous Detection mode
High-speed input request
signal (Leading edge
detection setting)
Mark detection data current
value
Mark detection data storage
device
Number of mark detection
**
counter
"0 clear" by user program
Specified Number of Detection mode (Number of detections: 2)
High-speed input request
signal (Leading edge
detection setting)
Mark detection data current
value
Mark detection data storage
device
Mark detection data storage
device (2nd area)
Number of mark detection
**
counter
"0 clear" by user program
Confirmation of mark detection data range
(Upper/lower value setting: Valid)
Real current value
(Continuous update)
Detected real current value
0 1
Confirmation of mark detection
data range (Upper/lower value
setting: Valid)
Real current value
(Continuous update)
Detection real current value (1st)
Detection real current value (2nd)
0 1
Data outside range are not latch.
Detected real current value
2
Mark detection is not executed
because the counter for number of
mark detections is already 2 (More
than the number of detections).
2
4 AUXILIARY AND APPLIED FUNCTIONS
4.3 Mark Detection Function
4
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