Mitsubishi Electric MELSEC-L LD75D, User Manual

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CHAPTER 10
HIGH-LEVEL POSITIONING
CONTROL
10.1
Outline of High-Level Positioning Control
In "high-level positioning control" the execution order and execution conditions of the "positioning data" are set to carry
out more applied positioning. (The execution order and execution conditions are set in the "block start data" and
"condition data".)
The following applied positioning controls can be carried out with "high-level positioning control".
*1 "1 block" is defined as all the data continuing from the positioning data in which "continuous positioning control" or
"continuous path control" is set in the operation pattern ([Da.1]) to the positioning data in which "independent positioning
control (Positioning complete)" is set.
*2 Besides the simultaneous start of "block start data" system, the "simultaneous starts" include the "multiple axes
simultaneous start control" of control system. Refer to

Page 473, Section 10.5 for details.
(1) High-level positioning control sub functions
"High-level positioning control" uses the "positioning data" set with the "major positioning control". Refer to

Page 58, Section 3.2.4 for details on sub functions that can be combined with the major positioning control.
Note that the pre-reading start function (

Page 598, Section 12.7.7) cannot be used together with "high-level
positioning control".
(2) High-level positioning control from GX Works2
"High-level positioning control" (start of the "block start data") can be executed from GX Works2 test function.
Refer to

Page 756, Appendix 6.5 for details on starting of the "block start data" from GX Works2.
High-level positioning control Details
Block
*1
start (Normal start)
With one start, executes the positioning data in a random block with the set order.
Condition start
Carries out condition judgment set in the "condition data" for the designated positioning data, and then executes the
"block start data".
• When the condition is established, the "block start data" is executed.
• When not established, that "block start data" is ignored, and the next point's " block start data" is executed.
Wait start
Carries out condition judgment set in the "condition data" for the designated positioning data, and then executes the
"block start data".
• When the condition is established, the "block start data" is executed.
• When not established, stops the control until the condition is established. (Waits.)
Simultaneous start
*2
Simultaneously executes the positioning data having the No. for the axis designated with the "condition data". (Outputs
pulses at the same timing.)
Repeated start (FOR loop)
Repeats the program from the "block start data" set with the "FOR loop" to the "block start data" set in "NEXT" for the
designated No. of times.
Repeated start (FOR condition)
Repeats the program from the "block start data" set with the "FOR condition" to the "block start data" set in "NEXT"
until the conditions set in the "condition data" are established.