YASKAWA V1000 Series

4.4 Basic Parameter Adjustments
YASKAWA TM.V1000.01 V1000 Drive Installation & Start-Up Manual (Preliminary 01-19-07) 143
Start-Up Programming & Operation
4
■ Using S-Curve Characteristics during Acceleration/Deceleration
Using S-curve characteristics to smooth acceleration and deceleration minimizes
abrupt shock to the load.
Note: 1. Setting S-curve characteristics will lengthen accel/decel times as follows:
Accel Time = Selected Accel Time + (C2-01 + C2-02)/2
Decel Time = Selected Decel Time + (C2-03 + C2-04)/2
2. Set longer S-curve times using PM Open Loop Vector Control.
Setting Example
S-curve characteristics when switching between forward and reverse are illustrated
in Figure 4.22.
Figure 4.22
Figure 4.22 S-Curve Characteristics
◆ V/f Pattern Selection: E1-03
This parameter is only available when using V/f Control. It allows the user to set
the V/f pattern and drive output voltage as required. When running a high-speed or
other type of special-purpose motor, use this function to fine tune the amount of
torque required for the load. The V/f pattern can be selected between 15 fixed V/f
patterns or 1 user programmable V/f pattern.
No. Parameter Name Description
Setting
Range
Default Page
E1-03 V/f Pattern Selection
0 to E: Select from 15 preset V/f patterns.
F: Custom V/f pattern (allows use of E1-04
through E1-10).
0 to F F 356
C2-02
C2-01
C2-03
C2-04
C2-02
C2-01
C2-03
C2-04
Forward Run
Command
Reverse Run
Command
Output
Frequency