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11 MANUAL CONTROL
11.4 Manual pulse generator operation
11.4.1 Outline of manual pulse generator operation
Cd. 21 Manual pulse
generator enable flag
BUSY signal [XC, XD, YE, XF]
Manual pulse
generator input
Start complete signal
[X10, X11, X12, X13]
[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.
Important
Create the PLC program so that "
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 QD75MH from the
manual pulse generator. This causes the same No. of input pulses to be output
from the QD75MH to the servo amplifier, and the workpiece is moved in the
designated direction.
The following shows and example of manual pulse generator operation.
When the "
Cd.21
Manual pulse generator enable flag" is set to "1", the BUSY signal
1)
turns ON and the manual pulse generator operation is enabled.
The workpiece is moved corresponding to the No. of pulses input from the manual pulse
2)
generator.
The workpiece movement stops when no more pulses are input from the manual pulse
3)
generator.
When the "
Manual pulse generator enable flag" is set to "0", the BUSY signal
Cd.21
4)
turns OFF and the manual pulse generator operation is disabled.
0
OFF
OFF
2
Fig. 11.18 Manual pulse generator operation
Cd.21
Manual pulse generator enable flag" is
1) 2)
ON
1
ON
Manual pulse generator operation enabled
11 - 27
MELSEC-Q
Manual pulse
generator
operation stops
1
3)
4)
0
t
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