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7. POSITIONING CONTROL
7.12
Speed Control (I)
Servo
Positioning
Instruction
Method
VF
VR
[Control Details]
(1) Speed control of the axis designated in the sequence program positioning
commands.
(2) Control includes positioning loops for control of servo amplifiers.
(3) Speed control (I) uses the VF (forward) and VR (reverse) servo instructions.
Common
Number of
Controllable
Axes
∆
!
!
1
(1) Controls the axis at the designated speed between the start of servo motor
operation and the input of the stop command.
• VF......... movement in forward direction
• VR ........ movement in reverse direction
(2) The present value does not change at zero.
V
Set
Start
speed
speed
control
Items Set by Peripherals
Arc
∆
∆
Operation speed
Fig.7.26 Speed Control (I)
7 − 60
Parameter Block
∆
∆
∆
∆
∆
∆
Stop command
received
Stop
Others
∆
∆
OK
! : Must be set
∆ : Set if required
t
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