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12 CONTROL SUB FUNCTIONS
Setting item
Pr.53 OP shift amount
Speed designation
Pr.56
during OP shift
Refer to section "5.2 List of parameters" for setting details.
(2) OP shift operation at the "
Pr.56
(When "
Pr. 44 OPR
direction
Zero point
OPR start
Near-point dog
Zero signal
Fig. 12.7 OP shift operation at the creep speed
[4] Precautions during control
The following data are set after the OP shift amount is complete.
•
OPR complete flag ("
•
Md.20
"
Current feed value"
•
Md.21
"
Machine feed value"
•
Md.26
"
Axis operation status"
•
"
Md.34
Movement amount after near-point dog ON" ("
amount" is not added.)
•
OPR request flag ("
shift.
[5] Setting the OP shift function
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
REMARK
•
Parameters are set for each axis.
•
It is recommended that the parameters be set whenever possible with GX
Configurator-QP. Execution by sequence program uses many sequence programs
and devices. The execution becomes complicated, and the scan times will
increase.
Pr.47
Creep speed"
Speed designation during OP shift" is 1)
Pr. 47 Creep
speed
When the Pr. 53 OP
shift amount is negative
Md.31
Status: b4)
Md.31
Status: b3") is reset after completion of the OP
Setting details
0:
Pr.46
OPR speed
Pr.47
1:
Creep speed
12 - 10
MELSEC-Q
When the Pr. 53 OP
shift amount is positive
OP
Pr.53
OP shift
ON) of the
Factory-set
initial value
0
0
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