Mitsubishi Electric MELSEC iQ-R RD75P4, User Manual

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7 CONTROL SUB FUNCTIONS
7.2 Sub Functions Specific to Machine OPR
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OPR retry operation when the workpiece is outside the range between the upper/lower limits
• When the direction from the workpiece to the OP is the same as the direction set in [Pr.44] OPR direction, the normal
machine OPR is performed. The following is an example of when [Pr.44] OPR direction is set to 0: Forward direction.
• When the direction from the workpiece to the OP is the opposite direction from the direction set in [Pr.44] OPR direction, the
operation performs the deceleration stop when Near-point dog signal is turned off, and performs the machine OPR in the
direction set in [Pr.44] OPR direction. The following is an example of when [Pr.44] OPR direction is set to 0: Forward
direction.
When [Pr.44] OPR direction is set to 0: Forward direction, check that the limit switch placed in the OPR
direction works as the upper limit.
When [Pr.44] OPR direction is set to 1: Reverse direction, check that the limit switch placed in the OPR
direction works as the lower limit.
Incorrect wiring of these limit switches may cause improper OPR retry operation.
If any malfunction is identified, check and correct the wiring and the setting in [Pr.6] Rotation direction setting.
Pr. 44 OPR direction
Upper limit Lower limit
Movement range
Machine OPR start
OP
Zero signal
Near-point dog
Pr. 44 OPR direction
Near-point dog
Upper limit
Lower limit
Movement range
Machine OPR start
OP
Zero signal