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Chapter 14 Common Functions
[2] How to use mark detection function
The following shows an example for mark detection by the external command
signal (DI2) of axis 2.
The mark detection target is axis 1 real current value, and the all range is
detected in continuous detection mode.
(1) Allocate the input signal (DI2) to the external command signal of axis 2, and
set the "high speed input request" for mark detection.
Storage item
Setting
value
Storage details/storage value
Buffer memory address
LD77MS2
LD77MS4
LD77MS16
Pr.95
External command
signal selection
2
Set "2: DI2" to the external command signal of axis 2.
—
219
(69+150n)
Pr.42
External command
function selection
4
Set "4: High speed input request" as the function used in
the external command signal of axis 2.
212 (62+150n)
n: Axis No.-1
(2) Set the following mark detection setting parameters. The optional mark
detection setting No. can be set.
Storage item
Setting
value
Storage details/storage value
Buffer memory address
LD77MS2
LD77MS4
LD77MS16
Pr.800
Mark detection
signal setting
2
Set "2: Axis 2" to the external input signal for mark
detection.
54000+20k
Pr.801
Mark detection
signal
compensation time
0
Set "0: (No compensation)" to the compensation time
such as delay of sensor.
54001+20k
Pr.802
Mark detection data
type
2
Set "2: Real current value" to the target data for mark
detection.
54002+20k
Pr.803
Mark detection data
axis No.
1
Set "1: Axis 1" to the axis No. of target data for mark
detection.
54003+20k
Pr.805
Latch data range
upper limit value
0
Set "0" to the valid upper limit value for latch data at
mark detection. (Mark detection for all range is executed
by setting the same value as lower limit value.)
54006+20k
54007+20k
Pr.806
Latch data range
lower limit value
0
Set "0" to the valid lower limit value for latch data at mark
detection. (Mark detection for all range is executed by
setting the same value as upper limit value.)
54008+20k
54009+20k
Pr.807
Mark detection
mode setting
0
Set "0: Continuous detection mode" to the mark
detection mode.
54010+20k
k: Mark detection setting No.-1
(3) Turn the power supply OFF or reset of PLC CPU to validate the setting
parameters.
(4) The mark detection starts by setting "1: Validates an external command." in
"
Cd.8
External command valid
" of axis 2 with the sequence program.
Refer to "
Md.800
Number of
mark detection
" or "
Md.801
Mark detection data
storage area
" of mark detection setting No. set in this section (2) for the
number of mark detections and mark detection data.
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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