Yaskawa F7 Drive Programming Manual - Manual (Page 40)

Programming 32
C4-03 Torque Compensation at Forward Start
Setting Range: 0.0 to 200.0 %
Factory Default: 0.0 %
This parameter may improve the motor performance during start. This feature functions only when starting a motor in the forward
direction. Torque reference and motor flux can be ramped up quickly to improve speed response during start. A setting of 0.0 disables
this feature.
C4-04 Torque Compensation at Reverse Start
Setting Range: -200.0 to 0.0 %
Factory Default: 0.0 %
This parameter may improve the motor performance during start. This feature functions only when starting a motor in the
reverse direction. Torque reference and motor flux can be ramped up quickly to improve speed response during start. A setting
of 0.0 disables this feature.
C4-05 Torque Compensation Time Constant
Setting Range: 0 to 200 ms
Factory Default: 10 ms
This parameter functions with C4-03 and C4-04. This parameter is the time delay that will be applied to the Torque
Compensation parameters C4-03 and C4-04. A setting of less than 4 milliseconds (ms) causes this filter to be disabled.
C5 ASR Tuning
The automatic speed regulator (ASR) provides optimum performance during changes in motor speed or load, when speed
feedback is provided.
Fig. 25 ASR Block Diagram (V/f Control with PG)
Fig. 26 ASR Block Diagram (Flux Vector Control)
Frequency Reference
P
C5-01, C5-03
+
-
I
Speed Feedback
C5-02, C5-04
C5-05
Limit
Output Frequency
+
+
+
+
Variation
Ratio Limit
Speed Reference P
C5-01, C5-03
+
-
I
Speed Feedback
C5-02, C5-04
C5-06
L7-01 ~ L7-04
1
1 + ST
Torque Limit
Secondary Current Reference
+
+