Instruction manual

6. DRIVE MODULE
6 − 7
[Operation example of constant-speed control]
The diagram below shows an example of operation when a reverse return request
is carried out in relation to constant-speed control.
[Servo program] [Track]
−
1000 1000
P1
P2 P3
P1
P2
P3
Start point
Start request SVST
Axis 2
Axis 1
CPSTART2
Axis 1
Axis 2
Speed 1000
ABS-2
Axis 1, 10000
Axis 2, 0
ABS-2
Axis 1, 10000
Axis 2, 10000
ABS-2
Axis 1, 20000
Axis 2, 10000
CPEND
Negative speed change
Start accept M200n
Speed change request
CHGV
Changed speed
Combined speed
Command in-position
(OFF)
Return operation to point P1
Stand by at point P1
Speed change "0"
accepting in progress
flag
As shown above, when a speed change is carried out to a negative speed while
execution of positioning at P2 is in progress, the system returns to P1 in
accordance with the start set in the program and waits in stand by at P1.
POINTS
(1) If the M-code FIN wait function is used in constant-speed control and a
reverse return request is carried out during FIN wait stoppage, the
request will be ignored.
(2) In the above example, if the
reverse return request return
is carried out just prior to P2
and P2 is passed during
deceleration, the system will
return to P2.
P1
P2 P3
Reverse return request
carried out here
Start point
Axis 1
Axis 2