Op Shift Function - Mitsubishi Electric MELSEC-L LD75P User Manual

12.2.2

OP shift function

When a machine OPR is carried out, the OP is normally established using the near-point dog, stopper, and zero signal.
However, by using the OP shift function, the machine can be moved a designated movement amount from the position
where the zero signal was detected. A mechanically established OP can then be interpreted at that point.
The OP shift function can be used without relation to "[Pr.43] OPR method".
The details shown below explain about the "OP shift function".
• Control details
• Setting range for the OP shift amount
• Movement speed during OP shift
• Control precautions
• Setting method
(1) Control details
The following drawing shows the operation of the OP shift function.
Pr. 46 OPR speed
Machine OPR start
(2) Setting range for the OP shift amount
Set the OP shift amount within the range from the detected zero signal to the upper/lower limit switches.
Setting range of the
negative OP
shift amount
Address decrease
direction
Lower limit
Zero signal
Pr. 44 OPR direction
Near-point dog
Zero signal
Setting range of the positive OP shift amount
Address increase
direction
Near-point dog
Pr. 44 OPR direction
CHAPTER 12 CONTROL SUB FUNCTIONS
Speed selected by the " Pr. 56
Speed designation during OP
shift"
Pr.47 Creep speed
Pr.53 OP shift amount
Shift operation carried out after
the deviation counter clear and reset.
Upper limit
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