11MANUAL CONTROL

MELSEC-Q

11.4 Manual pulse generator operation

11.4.1 Outline of manual pulse generator operation Important

Create the sequence program so that "

Cd.21

Manual pulse generator enable

flag" is always set to "0" (disabled) when a manual pulse generator operation is not carried out.

Mistakenly touching the manual pulse generator when the manual pulse generator enable flag is set to "1" (enable) can cause accidents or incorrect positioning.

Manual pulse generator operation

In manual pulse generator operations, pulses are input to the QD75 from the manual pulse generator. This causes the same No. of input pulses to be output from the QD75 to the servo amplifier, and the workpiece is moved in the designated direction.

The following shows and example of manual pulse generator operation.

1)When the " Cd.21 Manual pulse generator enable flag" is set to "1", the BUSY signal turns ON and the manual pulse generator operation is enabled.

2)The workpiece is moved corresponding to the No. of pulses input from the manual pulse generator.

3)The workpiece movement stops when no more pulses are input from the manual pulse generator.

4)When the " Cd.21 Manual pulse generator enable flag" is set to "0", the BUSY signal turns OFF and the manual pulse generator operation is disabled.

 

 

 

 

 

 

 

Manual pulse

 

 

 

 

 

 

 

 

 

 

 

 

 

 

generator

 

 

 

 

 

 

 

operation stops

1t

Manual pulse

 

1) 2)

 

 

3)

4)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

generator enable flag

0 1

 

 

 

 

0

 

ON

BUSY signal [XC, XD, YE, XF] OFF

Manual pulse generator input

Start complete signal

2

OFF

 

 

 

 

[X10, X11, X12, X13]

 

 

 

 

 

 

Manual pulse generator operation enabled

[Precautions]

1 If the input from the manual pulse generator stops, the machine will decelerate to a stop within 90 ms.

2 The start complete signal does not turn ON in manual pulse generator operation.

Fig. 11.18 Manual pulse generator operation

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Mitsubishi Electronics QD75D, QD75P user manual Manual pulse generator operation, Create the sequence program so that, Cd.21