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12 CONTROL SUB FUNCTIONS
Positioning start signal
PLC READY signal
All axis servo ON
QD75 READY signal
Start complete signal
BUSY signal
Positioning complete signal
Error detection signal
— á
Example
No.14 Speed change program
(2) The following shows the speed change time chart.
V
[Y10]
[Y0]
[Y1]
[X0]
[X10]
[XC]
[X14]
[X8]
In speed change
Md. 40
processing flag
Cd. 14 New speed value
Cd. 15 Speed change request
Fig. 12.27 Time chart for changing the speed from the PLC CPU
(3) Add the following PLC program to the control program, and write it to the
PLC CPU.
1
0
0
1
12 - 46
MELSEC-Q
Dwell time
0
2000
0
<Pulsate speed change command>
<Hold speed change command>
<Set speed change value
(20.00mm/min)>
<Set speed change request>
<Write speed change>
<Turn OFF speed change request
memory>
t
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