14 - 42
Chapter 14 Common Functions
[1] 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.
(1) Continuous detection mode
0
1
2
0
1
4: High speed input request
Mark detection signal
(Leading edge detection
setting)
Mark detection data value
Md.801 Mark detection data storage
area
Detected real current value
Detected real current value
Real current value
(Continuous update)
Data outside range are not latched.
Confirmation of mark detection data range
(Upper/lower limit value setting: Valid)
Number of mark detection
Md.800
External command function
selection
Pr.42
External command valid
Cd.8
Set "1" before mark detection start.
"0" clear by setting "1" in " Cd.800 Number of mark detection clear request".
(2) Specified number of detection mode (Number of detections: 2)
0
1
0
1
2
Detection real current value (2nd)
Detection real current value (1st)
Real current value
(Continuous update)
Confirmation of mark detection data range
(Upper/lower limit value setting: Valid)
"0 clear" by "1" of " Number of mark detection clear request".
Cd.800
4: High speed input request
Mark detection signal
(Leading edge detection
setting)
Mark detection data value
Md.801 Mark detection data storage
area (2nd area)
Number of mark detection
Md.800
External command function
selection
Pr.42
External command valid
Cd.8
Md.801 Mark detection data storage
area (1st area)
Set "1" before mark detection start.
Mark detection is not executed
because the number of mark
detections is already
2 (More than the specified
number of detections).
Summary of Contents for MELSEC-L Series
Page 2: ......
Page 30: ...MEMO ...
Page 70: ...2 10 Chapter 2 System Configuration MEMO ...
Page 83: ...3 13 Chapter 3 Specifications and Functions MEMO ...
Page 103: ...3 33 Chapter 3 Specifications and Functions MEMO ...
Page 107: ...3 37 Chapter 3 Specifications and Functions MEMO ...
Page 111: ...3 41 Chapter 3 Specifications and Functions MEMO ...
Page 115: ...3 45 Chapter 3 Specifications and Functions MEMO ...
Page 140: ...4 22 Chapter 4 Installation Wiring and Maintenance of the Product MEMO ...
Page 253: ...5 113 Chapter 5 Data Used for Positioning Control MEMO ...
Page 342: ...5 202 Chapter 5 Data Used for Positioning Control MEMO ...
Page 438: ...7 20 Chapter 7 Memory Configuration and Data Process MEMO ...
Page 440: ...MEMO ...
Page 485: ...9 25 Chapter 9 Major Positioning Control MEMO ...
Page 594: ...9 134 Chapter 9 Major Positioning Control MEMO ...
Page 624: ...10 30 Chapter 10 High Level Positioning Control MEMO ...
Page 656: ...11 32 Chapter 11 Manual Control MEMO ...
Page 690: ...12 34 Chapter 12 Expansion Control MEMO ...
Page 798: ...13 108 Chapter 13 Control Sub Functions MEMO ...
Page 866: ...14 68 Chapter 14 Common Functions MEMO ...
Page 884: ...15 18 Chapter 15 Dedicated Instructions MEMO ...
Page 899: ...16 15 Chapter 16 Troubleshooting MEMO ...
Page 1036: ...Appendix 88 Appendices MEMO ...
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