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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7
7.2
Sub Functions Specific to Machine OPR
The sub functions specific to machine OPR include OPR retry function and OP shift function. Each function is executed based
on the parameter setting.
OPR retry function
If a workpiece passes over the OP without stopping during the position control, the workpiece may not move back in the
direction of the OP although the machine OPR is commanded, depending on the workpiece position. In this case, the
workpiece has to be moved to a position before the near-point dog by the JOG operation or other operations to start the
machine OPR again. However, by using the OPR retry function, the machine OPR can be performed regardless of the
workpiece position.
Control details
The following shows the operation of the OPR retry function.
■ OPR retry operation when the workpiece is within the range between the upper/lower limits
(1) The movement starts in the direction set in [Pr.44] OPR direction by Machine OPR start.
(2) The operation decelerates when Limit signal OFF is detected.
(3) After the operation has stopped due to the detection of Limit signal OFF, the operation moves at the speed set in [Pr.46] OPR speed in the direction
opposite to the direction set in [Pr.44] OPR direction.
(4) The operation decelerates when Near-point dog signal is turned off.
(5) After the operation has stopped due to turning off of Near-point dog signal, the machine OPR is performed in the direction set in [Pr.44] OPR direction.
(6) Machine OPR is completed.
ON
(5) (1)
(2)
(3) (6)
(4)
Near-point dog
Limit signal OFF state
Zero signal