Mitsubishi QD75M1

12 - 5
MELSEC-Q
12 CONTROL SUB FUNCTIONS
(2) OPR retry operation when the workpiece is outside the range between the
upper and lower limits.
1) When the direction from the workpiece to the OP is the same as the "
Pr.44
OPR direction", a
normal machine OPR is carried out.
Pr. 44 OPR direction
H/W upper limit switch
H/W lower limit switch
Movement range
OPR start
OP
Zero signal
Near-point dog
2) When the direction from the workpiece to the OP is the opposite direction from the "
Pr.44
OPR
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 "
Pr.44
OPR direction".
Pr. 44 OPR direction
Near-point dog
H/W upper limit switch
H/W lower limit switch
Movement range
OPR start
OP
Zero signal
Fig. 12.2 OPR retry operation from on limit (limit switch OFF)