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10.3.7
Repeated start (FOR condition)
In a "repeated start (FOR condition)", the data between the " block start data" in which "5: FOR condition" is set in
"[Da.13] Special start instruction" and the " block start data" in which "6: NEXT start" is set in "[Da.13] Special start
instruction" is repeatedly executed until the establishment of the conditions set in the "condition data".
Conditional judgment is carried out as soon as switching to the point of "6: NEXT start" (before positioning of NEXT
start point).
(The "condition data" designation is set in "[Da.14] Parameter" of the " block start data" in which "5: FOR condition" is
set in "[Da.13] Special start instruction".)
Section (2) shows a control example where the " block start data" and "positioning data" are set as shown in section
(1).
(1) Setting examples
(a) Block start data setting example
The "condition data Nos." have been set in "[Da.14] Parameter".
(b) Positioning data setting example
(2) Control examples
The following shows the control executed when the "block start data" of the 1st point of axis 1 is set as shown in
section (1) and started.
1.
Execute axis 1 "Positioning data No. 1, 2, 3, 10, 11".
2.
Execute the conditional judgment set in axis 1 "Condition data No.5".
*1
• Conditions not established
Execute "Positioning data No. 50, 51". Go to "1"
• Conditions established
Execute "Positioning data No.50, 51" and complete the positioning.
*1
Conditional judgment is carried out as soon as switching to NEXT start point (before positioning of NEXT start point).
Axis 1 block start data
[Da.11]
Shape
[Da.12]
Start data No.
[Da.13]
Special start instruction
[Da.14]
Parameter
1st point
1: Continue
1
5: FOR condition
5
2nd point
1: Continue
10
0: Block start
3rd point
0: End
50
6: NEXT start
Axis 1 positioning data No.
[Da.1] Operation pattern
1
01: Continuous positioning control
2
01: Continuous positioning control
3
00: Positioning complete
10
11: Continuous path control
11
00: Positioning complete
50
01: Continuous positioning control
51
00: Positioning complete
Summary of Contents for MELSEC-L LD75D
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Page 11: ...9 Memo ...
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Page 267: ...265 CHAPTER 6 PROGRAM USED FOR POSITIONING CONTROL 6 6 4 Positioning Program Examples ...
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Page 272: ...270 Z ABRST1 instruction execution ...
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Page 685: ...683 APPENDICES A Appendix 1 Function Update Appendix 1 1 Function comparison Memo ...
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