12 - 8
MELSEC-Q
12 CONTROL SUB FUNCTIONS
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".
[1] Control details
[2] Setting range for the OP shift amount
[3] Movement speed during OP shift
[4] Control Precautions
[5] Setting method
[1] Control details
The following drawing shows the operation of the OP shift function.
Machine OPR start
Pr.53 OP shift amount
Speed selected by the " Pr. 56
Speed designation during OP
shift"
Pr.47 Creep speed
Shift operation carried out after
the deviation counter clear and reset.
Pr. 44 OPR direction
Near-point dog
Pr. 46 OPR speed
Zero signal
Fig. 12.4 OP shift operation
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