Mitsubishi Electric MELSEC-LD77MS2 User Manual page 700

(2) OP shift operation at the "
Pr. 44 OPR
V
direction
Machine OPR start
Near-point dog
[4] Precautions during control
(1) The following data are set after the OP shift amount is complete.
(2) "
[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 Simple Motion module.
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 item
OP shift amount
Pr.53
Speed
designation
Pr.56
during OP shift
: Refer to Section 5.2 "List of parameters" for setting details.
REMARK

Parameters are set for each axis.
 It is recommended that the parameters be set whenever possible with GX Works2.
Execution by sequence program uses many sequence programs and devices. The
execution becomes complicated, and the scan times will increase.
(When "
Speed designation during OP shift
Pr.56
Pr. 47 Creep
speed
OP
Zero signal
Fig. 13.7 OP shift operation at the creep speed
 OPR complete flag (

Current feed value
Md.20

Machine feed value
Md.21

Axis operation status
Md.26
OPR request flag (
Md.31
OP shift amount
Pr.53
". The movement amount immediately before the OP shift
point dog ON
operation, considering near-point dog ON as "0", is stored.
Setting
value
Set the shift amount during the OP shift.
Select the speed during the OP shift
0:
OPR speed
Pr.46
1:
Creep speed
Pr.47
13 - 10
Chapter 13 Control Sub Functions
Creep speed
Pr.47
OP
When the " Pr. 53 OP
shift amount" is negative
: b4)
Status
Md.31
: b3) is reset after completion of the OP shift.
Status
" is not added to "
Md.34
Setting details
"
" is 1)
When the " Pr. 53 OP
shift amount" is positive
Movement amount after near-
ON) of the
Factory-set
initial value
0
0