Mitsubishi Electric MELSEC-Q Series - Page 653

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Chapter 13 Control Sub Functions
[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 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 speed change time chart shown in section (2) below as a reference,
and set using the sequence program shown in section (3).)
Setting item
Setting
value
Setting details Buffer memory address
[Pr.42]
External command
function selection
1 Set "1: External speed change request". 62+150n
[Cd.8]
External command
valid
1 Set "1: Validates an external command.". 4305+100n
[Cd.14] New speed value 1000000 Set the new speed.
4314+100n
4315+100n
n: Axis No.-1
: Set the external command signal (DI) to be used in "[Pr.95] External command signal selection".
Refer to Section 5.2 "List of parameters" and Section 5.7 "List of control data" for details on the setting details.
(2) The following shows the speed change time chart.
Pr. 42 External command function selection
V
t
0
1
0
1
Md.40 In speed change processing flag
Cd. 14 New speed value
1000000
1
0
Cd. 8 External command valid
Dwell time
BUSY signal
PLC READY signal
Positioning start signal
READY signal
[Y10]
[X10]
[X0]
[Y0]
External command signal
A
ll axis servo ON
[Y1]
Error detection signal
( Md. 31 Status: b13)
Start complete signal
( Md. 31 Status: b14)
Positioning complete signal
( Md. 31 Status: b15)
Fig. 13.27 Time chart for changing the speed using an external command signal