13 - 4
Chapter 13 Control Sub Functions
13.2 Sub functions specifically for machine OPR
The sub functions specifically for machine OPR include the "OPR retry function" and
"OP shift function". Each function is executed by parameter setting.
13.2.1 OPR retry function
When the workpiece goes past the OP without stopping during positioning control, it
may not move back in the direction of the OP although a machine OPR is commanded,
depending on the workpiece position. This normally means the workpiece has to be
moved to a position before the near-point dog by a JOG operation, etc., to start the
machine OPR again. However, by using the OPR retry function, a machine OPR can
be carried out regardless of the workpiece position.
The details shown below explain about the "OPR retry function".
[1] Control details
[2] Precautions during control
[3] Setting the OPR retry function
[1] Control details
The following drawing shows the operation of the OPR retry function.
(1) OPR retry point return retry operation when the workpiece is within the
range between the upper and lower limits.
1) The movement starts in the "
Pr.44
OPR direction
" by a machine OPR start.
2) The operation decelerates when the limit signal OFF is detected.
3) After stopping due to the limit signal OFF detection, the operation moves at the "
Pr.46
OPR speed
" in the
opposite direction of the "
Pr.44
OPR direction
".
4) The operation decelerates when the near-point dog turns OFF.
5) After stopping due to the near-point dog OFF, a machine OPR is carried out in the "
Pr.44
OPR direction
".
6) Machine OPR completion.
5)
1)
Near-point dog
Limit signal OFF
ON
2)
3)
6)
4)
Zero signal
Hardware limit switch
Fig. 13.1 OPR retry operation by limit signal detection
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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