Mitsubishi Electric MELSEC-Q QD75M User Manual page 581

12 CONTROL SUB FUNCTIONS
Setting item
External command
Pr.42
function selection
External command
Cd.8
valid
Cd.14
New speed value
Refer to section "5.7 List of control data" for details on the setting details.
Positioning start signal
PLC READY signal
All axis servo ON
QD75 READY signal
Start complete signal
BUSY signal
Positioning complete signal
Error detection signal
External command signal
Fig. 12.26 Time chart for changing the speed using an external command signal
[4] Setting the speed change function using an external command
signal
The speed can also be changed using an "external command signal".
The following shows the data settings and PLC program example for changing
the control speed of axis 1 using an "external command signal". (In this example,
the control speed is changed to "10000.00mm/min".)
(1) Set the following data to change the speed using an external command
signal.
(Use the start time chart shown in section (2) below as a reference, and set
using the PLC program shown in section (3).)
Setting
value
1 Set "1: External speed change request".
1 Set "1: Validate the external command".
1000000 Set the new speed.
(2) The following shows the speed change time chart.
V
[Y10]
[Y0]
[Y1]
[X0]
[X10]
[XC]
[X14]
[X8]
Pr. 42 External command function selection
Md.40 In speed change processing flag
Cd. 8 External command valid
Cd. 14 New speed value
Setting details
1
0 1
0 1
1000000
12 - 42
MELSEC-Q
Buffer memory address
Axis Axis Axis Axis
1 2 3 4
62 212 362 512
1505 1605 1705 1805
1514 1614 1714 1814
1515 1615 1715 1815
Dwell time
t
0
0