Справочник Пользователя для Mitsubishi Electronics QD77MS16
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Chapter 9 Major Positioning Control
9.2.18 Position-speed switching control
In "position-speed switching control" ("[Da.2] Control system" = Forward run:
position/speed, Reverse run: position/speed), before the position-speed switching
signal is input, position control is carried out for the movement amount set in "[Da.6]
Positioning address/movement amount" in the axis direction in which the positioning
data has been set. When the position-speed switching signal is input, the position
control is carried out by continuously outputting the pulses for the speed set in "[Da.8]
Command speed" until the input of a stop command.
The two types of position-speed switching control are "Forward run: position/speed" in
which the control starts in the forward run direction, and "Reverse run: position/speed"
in which control starts in the reverse run direction.
position/speed, Reverse run: position/speed), before the position-speed switching
signal is input, position control is carried out for the movement amount set in "[Da.6]
Positioning address/movement amount" in the axis direction in which the positioning
data has been set. When the position-speed switching signal is input, the position
control is carried out by continuously outputting the pulses for the speed set in "[Da.8]
Command speed" until the input of a stop command.
The two types of position-speed switching control are "Forward run: position/speed" in
which the control starts in the forward run direction, and "Reverse run: position/speed"
in which control starts in the reverse run direction.
Switching over from position control to speed control
(1) The control is selected the switching method from position control to speed
control by the setting value of "[Cd.45] Speed-position switching device
selection".
selection".
Setting item
Setting
value
Setting details
Buffer memory address
QD77MS2
QD77MS4
QD77MS4
QD77MS16
[Cd.45]
Speed-
position
switching
device
selection
position
switching
device
selection
The device used for speed-
position switching is selected.
0: Use the external command
position switching is selected.
0: Use the external command
signal for switching from
position control to speed
control
position control to speed
control
1: Use the near-point signal for
switching from position control
to speed control
to speed control
2: Use the "[Cd.46] Speed-
position switching command"
for switching from position
control to speed control
for switching from position
control to speed control
1566+100n 4366+100n
The switching is performed by using the following device when "2" is set.
Setting item
Setting
value
Setting details
Buffer memory address
QD77MS2
QD77MS4
QD77MS4
QD77MS16
[Cd.46]
Speed-
position
switching
command
position
switching
command
The speed-position control
switching is performed when "2"
is set in "[Cd.45] Speed-position
switching device selection".
switching is performed when "2"
is set in "[Cd.45] Speed-position
switching device selection".
1567+100n 4367+100n