12 - 43 
MELSEC-Q
12   CONTROL SUB FUNCTIONS 
 
[3]   Setting the speed change function from the CPU module 
The following shows the data settings and sequence program example for 
changing the control speed of axis 1 from the CPU module. (In this example, the 
control speed is changed to "20.00mm/min".) 
 
(1)  Set the following data. 
(Use the start time chart shown in section (2) below as a reference, and set 
using the sequence program shown in section (3).) 
 
Buffer memory address
Setting item 
Setting 
value 
Setting details 
Axis 
1 
Axis 
2 
Axis 
3 
Axis 
4 
Cd.14
 
New speed value  2000  Set the new speed. 
1514 
1515 
1614 
1615 
1714
1715
1814
1815
Cd.15
 
Speed change 
request 
1  Set "1: Change the speed".  1516  1616  1716 1816
 
   Refer to Section 5.7 "List of control data" for details on the setting details. 
 
(2)  The following shows the speed change time chart. 
 
Cd. 15  Speed change request 
Cd. 14  New speed value
In speed change
processing flag
BUSY signal
QD75 READY signal
Error detection signal
V
t
1
0
0
1
0
2000
0
Start complete signal
Dwell time
PLC READY signal
Positionin
 start si
nal
Positioning complete signal
[Y10]
[Y0]
[X0]
[X10]
[XC]
[X14]
[X8]
Md. 40
Fig. 12.28 Time chart for changing the speed from the CPU module