C5-02 adjusts the drive’s response time to changes in load. Speed response increases as the integral time is decreased. However, the load may become
unstable if the ASR integral time is set too low. ASR Integral Time 2 is an additional integral time adjustment that can be enabled by the ASR switching
frequency (C5-07).
No. Parameter Name Setting Range Default
C5-01 ASR Proportional Gain 1 (for Simple PG in V/f) 0.00 to 300.00 0.20
C5-02 ASR Integral Time 1 (for Simple PG in V/f) 0.000 to 10.000 0.200
C5-03 ASR Proportional Gain 2 (for Simple PG in V/f) 0.00 to 300.00 0.02
C5-04 ASR Integral Time 2 (for Simple PG in V/f) 0.000 to 10.000 0.050
Detailed Description
Both the proportional gain P and integral time I for ASR should be set in accordance with the minimum output frequency and the maximum output
frequency.
The figure below illustrates how the proportional gain P and integral time I change linearly with motor speed.
P gain and I time
Motor Speed
E1-04
Maximum
Output
Frequency
0
P = C5-03
I = C5-04
P = C5-01
I = C5-02
E1-09
Minimum
Output
Frequency
Figure 5.27 Adjusting ASR Proportional Gain and Integral Time
n
C5-05: ASR Limit
Sets ASR frequency compensation limit as a percentage of maximum output frequency (E1-04).
No. Parameter Name Setting Range Default
C5-05 ASR Limit 0.0 to 20.0 5.0%
u
C6: Carrier Frequency
n
C6-01: Drive Duty Mode Selection
The drive has two different duty modes which must be selected based on the load characteristics. The drives rated current, overload capability and the
stall prevention levels during acceleration will change depending on the duty mode selection. Heavy Duty allows over load up to 150% for 1 min, Normal
Duty allows up to 120% for 1 min. but therefore the drives rated current is higher.
Refer to Heavy Duty and Normal Duty Ratings on page 282 for
details about the rated current.
No. Parameter Name Setting Range Default
C6-01 Duty Cycle
Selects the load rating for the drive.
0: Heavy Duty, HD (low carrier frequency and constant torque)
1: Normal Duty, ND (high carreir frequency and derated torque)
1
Detailed Description
Set the drive for the type of load using parameter C6-01 (Duty Cycle). The factory setting is Normal Duty
Heavy Duty (HD) vs. Normal Duty (ND) Mode Selections
Mode Heavy Duty Rating (HD) Normal Duty Rating (ND)
C6-01 0 1
Characteristics
100 %
100 %
0 Motor Speed
Rated Load
Overload
150 %
Motor Speed
0
100 %
100 %
120 %
Rated Load
Overload
Application
Use Heavy Duty Rating is designed applications requiring a high overload
tolerance with constant load torque. Such applications include extruders,
conveyors and cranes.
Use Normal Duty Rating for applications in which the torque requirements drop
along with the speed. Examples include fans or pumps where a high overload
tolerance is not required.
Overload capability (OL2) 150% of drive rated current for 60 s 120% of drive rated current for 60 s
L3-02 Stall Prevention during
Acceleration
150% 120%
5.3 C: Tuning
136
YASKAWA ELECTRIC SIEP C710606 18A YASKAWA AC Drive – V1000 Technical Manual (Preliminary)
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