Op Shift Function - Mitsubishi Electric MELSEC iQ-R-RD75P4 User Manual

OP shift function

When the machine OPR is performed, the OP is normally established using a near-point dog, stopper, and Zero signal.
However, by using the OP shift function, the machine can be moved for a specified movement amount from the position where
Zero signal was detected. The point moved from that position can be interpreted as a mechanically established OP.
The OP shift function can be used regardless of the setting in [Pr.43] OPR method.
The section explains the OP shift function.
Control details
The following figure shows the operation of the OP shift function.
Pr.44
Pr.46 OPR speed
(1)
Near-point dog
(1) The OPR is performed in the direction set in [Pr.44] OPR direction by Machine OPR start.
(2) The OPR operation stops when Zero signal is detected and outputs Deviation counter clear output to the drive unit.
(3) After Deviation counter clear output is output, the OP shift operation is performed.
(4) The position moved for the amount set in [Pr.53] OP shift amount is set as the OP, and the machine OPR is completed.
Setting range of the OP shift amount
Set the OP shift amount within the range from the detected zero signal to the upper/lower limit switches.
Setting range of
the negative OP
shift amount
Address
decrement
Lower limit
Zero signal
OPR direction
(2)
Zero signal
Setting range of the positive OP shift amount
Address
increment
Near-point dog
Pr. 44 OPR direction
Select the speed in Pr.56 Speed
specification during OP shift.
Pr.47
Creep speed
(4)
Pr.53 OP shift amount
(3)
Upper limit
7.2 Sub Functions Specific to Machine OPR
7 CONTROL SUB FUNCTIONS
7
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