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12 CONTROL SUB FUNCTIONS
[4] Setting the speed change function using an external command
Setting item
Pr.42 External command
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
QD75 READY signal
Start complete signal
BUSY signal
Positioning complete signal
Error detection signal
External command signal
Pr. 42 External command function selection
Md.40 In speed change processing flag
Cd. 8 External command valid
Cd. 14 New speed value
Fig. 12.27 Time chart for changing the speed using an external command signal
signal
The speed can also be changed using an "external command signal".
The following shows the data settings and sequence 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 sequence 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]
[X0]
[X10]
[XC]
[X14]
[X8]
12 - 39
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Setting details
1
0
1
0
1
1000000
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
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