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6 POSITIONING CONTROL
6.14 Speed Control ( )
(1) Speed control for the specified axis is executed.
(2) Speed control not includes positioning loops for control of servo amplifiers.
It can be used for stopper control, etc. so that it may not become error excessive.
POINT
Refer to Section 7.7 for performing speed control that does not include positioning
loops without using the servo program.
QDS
(3) Speed control (
) uses the VVF (Forward) and VVR (Reverse) servo instructions.
Servo
instruction
Positioning
method
Number of
control axes
Items set using MT Developer2
Speed
change
Common Arc Parameter block Others
Parameter block No.
Axis
Address/travel value
Command speed
Dwell time
M-code
Torque limit value
Auxiliary point
Radius
Central point
Interpolation control unit
Speed limit value
Acceleration time
Deceleration time
Rapid Stop deceleration time
Torque limit value
Deceleration processing on stop input
Allowable error range for circular interpolation
S-curve ratio
Advanced S-curve acceleration/deceleration
Cancel
WAIT-ON/OFF
VVF
— 1
Valid
VVR
: Must be set
: Set if required
[Control details]
(1) Controls the axis at the specified speed until the input of the stop command after
starting of the servo motors.
• VVF ....... Forward direction start
• VVR ....... Reverse direction start
(2) Current value or deviation counter do not change at "0".
(3) When the setting for "torque" is set in the servo program and an indirect setting
made, the torque limit value can be changed during operation by changing the
value of the indirect device.
(4) The stop command and stop processing are the same as for speed control (I).
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