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9 MAJOR POSITIONING CONTROL
9.2.18 Position-speed switching control
In "position-speed switching control" ("
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
"
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
"
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.
Da.6
Positioning address/movement amount" in the axis direction in which the
Da.8
command speed" until the input of a stop command.
Switching over from position control to speed control
(1) The control is switched over from position control to speed control by the
external signal "position-speed switching signal".
(2) Besides setting the positioning data, the "
enable flag" must also be turned ON to switch over from position control to
speed control. (If the "
after the position-speed switching signal turns ON, the control will continue as
position control without switching over to speed control. Only speed control will
be carried out when the "
position-speed switching signal are ON at the operation start.)
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Da.2
Control system" = Forward run:
Cd.26
Cd.26
Position-speed switching enable flag" turns ON
Cd.26
Position-speed switching enable flag" and
9 - 98
MELSEC-Q
Position-speed switching
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