Mitsubishi Electric QD75P1N User Manual page 534

12 CONTROL SUB FUNCTIONS
Setting item
Pr.53 OP shift amount
Speed
Pr.56 designation
during OP shift
Refer to Section 5.2 "List of parameters" for setting details.
(2) OP shift operation at the " Pr.47 Creep speed"
(When " Pr.56 Speed designation during OP shift" is 1)
Pr. 44 OPR
direction
Zero point
Machine OPR start
Near-point dog
Zero signal
Fig. 12.7 OP shift operation at the creep speed
[4] Control Precautions
(1) The following data are set after the OP shift amount is complete.
 OPR complete flag (" Md.31 Status: b4)
 Md.20 Current feed value
 Md.21 Machine feed value

Md.26 Axis operation status
OPR request flag ( Md.31 Status: b3) is reset after completion of the OP
shift.
(2) " Pr.53 OP shift amount" is not added to " Md.34 Movement amount
after near-point dog ON". The movement amount immediately before the OP
shift operation, considering near-point dog ON as "0", is stored. For the
stopper method (1) 2) 3)), the movement amount is not changed from "0".
(3) When using the OP shift function with the stopper method (1) 2) 3)) selected
for the OPR method, configure the OP shift operation in the opposite
direction of the OPR direction.
It cannot shift to the OPR direction due to a mechanical stopper in the OPR
direction.
[5] Setting method
To use the "OP shift function", set the required details in the parameters shown in
the following table, and write them to the QD75.
When the parameters are set, the OP shift function will be added to the machine
OPR control. The set details are validated at the rising edge (OFF
PLC READY signal (Y0).
Setting
value
Set the shift amount during the OP shift.
Select the speed during the OP shift
Pr. 47 Creep
speed
When the " Pr. 53 OP
shift amount" is negative
Setting details
0: Pr.46 OPR speed
1: Pr.47 Creep speed
12 - 10
MELSEC-Q
When the " Pr. 53 OP
shift amount" is positive
OP
ON) of the
Factory-set
initial value
0
0