APPLICATIONS
2.5.1 Soft Start Function
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2.5
Running the Motor Smoothly
This section explains how to run the Servomotor smoothly.
2.5.1 Soft Start Function
The soft start function adjusts progressive speed reference input inside the Servopack so that
acceleration and deceleration can be as constant as possible. To use this function, set the
following parameters.
Cn-07
SFSACC
Soft Start Time (Acceleration)
Unit:
ms
Setting
Range:
0 to
10000
Factory
Setting:
0
For Speed/Torque
Control
Cn-23
SFSDEC
Soft Start Time (Deceleration)
Unit:
ms
Setting
Range:
0 to
10000
Factory
Setting:
0
For Speed/Torque
Control
In the Servopack, a speed reference is multiplied by
the acceleration or deceleration value set in Cn-07 or
Cn-23 to provide speed control.
Smooth speed control can be achieved when progres-
sive speed references are input or when contact input
speed control is used.
Set these parameters as follows:
Cn-07: Time interval from the time the motor starts until the maximum speed
(5000 min
−
1
) is reached.
Cn-23: Time interval from the time the motor is running at the maximum speed
(5000 min
−
1
) until it stops.
2
Speed/Torque
Speed
reference
Soft start
Servopack
internal speed
reference
Cn-07: Set this time interval.
Cn-23: Set this time interval.
5000 min
−
1
Maximum
speed
Reference
speed
Maximum
speed
Reference
speed
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