Jog Operation; Outline Of Jog Operation - Mitsubishi Electric MELSEC-L LD75P User Manual

11.2

JOG Operation

11.2.1

Outline of JOG operation

Use the hardware stroke limit function when carrying out JOG operation near the upper or lower limits. ( Page 541,
Section 12.4.4)
If the hardware stroke limit function is not used, the workpiece may exceed the movement range, and an accident may
result.
(1) JOG operation
In JOG operation, the Forward run JOG start signal [Y8, YA, YC, YE] or Reverse run JOG start signal [Y9, YB,
YD, YF] turns ON, causing pulses to be output to the drive unit from the LD75 while the signal is ON. The
workpiece is then moved in the designated direction.
The following shows examples of JOG operation.
1.
When the JOG start signal turns ON, acceleration begins in the direction designated by the JOG
start signal, and continues for the acceleration time designated in "[Pr.32] JOG operation
acceleration time selection". At this time, the BUSY signal changes from OFF to ON.
2.
When the workpiece being accelerated reaches the speed set in "[Cd.17] JOG speed", the
movement continues at this speed. The constant speed movement takes place at 2 and 3.
3.
When the JOG start signal is turned OFF, deceleration begins from the speed set in "[Cd.17] JOG
speed", and continues for the deceleration time designated in "[Pr.33] JOG operation deceleration
time selection".
4.
The operation stops when the speed becomes "0". At this time, the BUSY signal changes from ON
to OFF.
Cd.17
Acceleration for the acceleration
time selected in
Pr.32
PLC READY signal
[Y0]
LD75 READY signal
[X0]
Forward run JOG start signal
[Y8, YA, YC, YE]
Reverse run JOG start signal
[Y9, YB, YD, YF]
BUSY signal
[XC, XD, XE, XF]
JOG
speed
Forward
JOG operation
1 2
ON
OFF
ON
OFF
ON
OFF
OFF
ON
OFF
CHAPTER 11 MANUAL CONTROL
Deceleration for the deceleration
time selected in
Pr.33
3 4
Reverse JOG operation
ON
11
481