Mitsubishi Electronics QD75P, QD75D user manual JOG operation Outline of JOG operation Important

11 MANUAL CONTROL

11.2 JOG operation

11.2.1Outline of JOG operation Important

MELSEC-Q

Use the hardware stroke limit function when carrying out JOG operation near the upper or lower limits. (Refer to Section 12.4.4).

*If the hardware stroke limit function is not used, the workpiece may exceed the moving range, causing an accident.

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 QD75 while the signal is ON. The workpiece is then moved in the designated direction.

The following shows examples of JOG operation.

When the START signal turns ON, acceleration begins in the direction designated by the

1) 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.

When the workpiece being accelerated reaches the speed set in " Cd.17 JOG speed",

2)the movement continues at this speed.

The constant speed movement takes place at 2) and 3).

When the START signal is turned OFF, deceleration begins from the speed set in

3)" 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.

	JOG speed
Acceleration for the acceleration						Deceleration for the deceleration
time selected in				Forward JOG run		time selected in
			1)	2)	3)	4)
						Reverse JOG run
		ON
PLC READY signal	[Y0]	OFF
		ON
QD75 READY signal	[X0]	OFF
Forward run JOG start signal		OFF	ON
[Y8, YA, YC, YE]
						ON
Reverse run JOG start signal		OFF
[Y9, YB, YD, YF]			ON
BUSY signal[XC, XD, XE, XF]		OFF

Fig. 11.4 JOG operation

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