Mitsubishi Electric MELSEC-L LD75P User Manual page 550

(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 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".)
(a) Set the following data to change the speed using an external command signal.
(Use the start time chart shown in section (b) below as a reference, and set data using the program shown in
section (c).)
Setting item
External
command
[Pr.42]
function
selection
External
[Cd.8]
command valid
New speed
[Cd.14]
value
Refer to  Page 211, Section 5.7 for the information on detail settings.
(b) The following shows the speed change time chart.
Positioning start signal [Y10]
PLC READY signal [Y0]
LD75 READY signal [X0]
Start complete signal [X10]
BUSY signal [XC]
Positioning complete [X14]
signal
Error detection signal [X8]
External command signal
548
Setting value
1 Set "1: External speed change request".
1 Set "1: Validate external command".
1000000 Set the new speed.
V
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
Buffer memory address
Axis 1 Axis 3 Axis 2
62 212 362
1505 1605 1705
1514 1614 1714
1515 1615 1715
Dwell time
t
0
0
Axis 4
512
1805
1814
1815