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] Precautions during control
[5] Setting the OP shift function
[1] Control details
The following drawing shows the operation of the OP shift function.
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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