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11 MANUAL CONTROL
11.3 Manual pulse generator operation
11.3.1 Outline of manual pulse generator operation
Manual pulse generator
enable flag
[RY(n+2)9, RY(n+4)9]
BUSY signal
Manual pulse
generator input
Positioning start complete
2
signal
*
[Precautions]
1
*
When the input from the manual pulse generator stops, the last pulse will be output from the
D75P2, delayed by the time for one control cycle (180ms).
2
*
The start complete signal does not turn ON in manual pulse generator operation.
Important
Create the sequence program so that "Manual pulse generator enable flag
(RY(n+2)9, RY(n+4)9)" 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 D75P2 from the
manual pulse generator. This causes the same No. of input pulses to be output
from the D75P2 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 "Manual pulse generator enable flag (RY(n+2)9, RY(n+4)9)" is set to "1", the
1)
BUSY signal 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 (RY(n+2)9, RY(n+4)9)" is set to "0", the
4)
BUSY signal turns OFF and the manual pulse generator operation is disabled.
1) 2)
ON
OFF
ON
OFF
[RXn4, RXn5]
OFF
[RXn1, RXn2]
Fig. 11.11 Manual pulse generator operation
Manual pulse generator operation enabled
11 - 16
MELSEC-A
Manual pulse
generator
1
operation stops
*
3)
4)
t
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