6 POSITIONING CONTROL

6.14Speed 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.

(3)Speed control () uses the VVF (Forward) and VVR (Reverse) servo instructions.

 

 

 

 

 

Items are set in peripheral devices

 

 

 

 

 

 

Common

Arc

Parameter block

Others

 

 

 

 

blockParameterNo.

Axis valueAddress/travel speedCommand timeDwell code-M

valuelimitTorque pointAuxiliary Radius pointCentral unitControl

input

interpolation

Servo

Positioning

 

valuelimitSpeed timeAcceleration timeDeceleration decelerationstopRapid time valuelimitTorque processingDecelerationon stop

errorAllowablerange for circular ratiocurve-S Cancel ON/OFF-WAIT

Number of

 

 

 

 

Speed change

instruction

method

control axes

 

 

 

 

 

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 servomotors.

•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).

[Cautions]

(1) After executing of the speed control using the absolute position system, the feed current value cannot be set to "0" by the following operations:

• Reset

• Turning the servo power supply on (OFF ON)

(2)The dwell time cannot be set.

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