Mitsubishi MELSEC QD75P User Manual page 402

9 MAJOR POSITIONING CONTROL
Position-speed switching control start
Position-speed switching
signal
Position-speed
Cd.25
switching control
speed change register
Position-speed switching
latch flag
Md.31 Status: b5
Stop signal
Position-speed switching signal setting
The following table shows the items that must be set to use the external command
signals (CHG) as position-speed switching signals.
Setting
Setting item
value
External
command
Pr.42
2
function
selection
External
Cd.8
command 1
valid
Refer to Section 5.2 "List of parameters" and Section 5.7 "List of control data" for information on the
setting details.
Changing the speed control command speed
In "position-speed switching control", the speed control command speed can be
changed during the position control.
(1) The speed control command speed can be changed during the position control
of position-speed switching control.
A command speed change request will be ignored unless issued during the
position control of the position-speed switching control.
(2) The "new command speed" is stored in "
control speed change register" by the sequence program during position
control.
This value then becomes the speed control command speed when the
position-speed switching signal turns ON.
Position
control
Speed change
enable
OFF
0 V2
ON
OFF
OFF
Fig. 9.20 Speed control speed change timing
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Setting details
Set the "2: speed-position and
position-speed switching
requests".
Set "1: Validate external
command".
Cd.25
Speed
control
Position control start
ON
Setting after the position-speed
switching signal ON is ignored.
V3
V2 becomes the speed control command speed.
ON
9 - 102
MELSEC-Q
Buffer memory address
Axis 1 Axis 2 Axis 3 Axis 4
62 212 362
1505 1605 1705 1805
Position-speed switching
t
512