Mitsubishi QD75P1N User Manual page 503

12 CONTROL SUB FUNCTIONS
(a) When the direction from the workpiece to the OP is the same as the "
normal machine OPR is carried out.
(b) When the direction from the workpiece to the OP is the opposite direction from the "
direction", the operation carries out a deceleration stop when the near-point dog turns OFF, and
then carries out a machine OPR in the direction set in "
Note) The above figures in (a) and (b) are examples where "
Positive direction". When "0: Positive direction" is set in
placed in the OPR direction acts as the upper limit. When "1: Negative direction" is set in
Pr.44
, check that the limit switch placed in the OPR direction acts as the lower limit. Incorrect
wiring of these limit switches may cause improper OPR retry operation. If any malfunction is
identified, check and correct "
(2) OPR retry operation when the workpiece is outside the range between the
upper/lower limits.
Machine OPR start
Pr. 44 OPR direction
Lower limit
Pr. 44 OPR direction
Lower limit
Pr.6
Fig. 12.2 OPR retry operation from on limit (limit switch OFF)
Near-point dog
Zero signal
Movement range
Pr.44
Near-point dog
Zero signal
Movement range
Pr.44
Rotation direction setting" and the wiring.
12 - 5
OPR direction", a
Pr.44
OP
Upper limit
OPR direction".
Machine OPR start
OP
Upper limit
OPR direction" is set to "0:
Pr.44
, check that the limit switch
MELSEC-Q
OPR
Pr.44