N7: Ez Drive - YASKAWA GA800 Programming Manual

2.10 n: Special Adjustment
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n7: EZ Drive

The n7 parameters provide special adjustments for EZ Vector Control.
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n7-01: Damping Gain for Low Frequency
No.
Name
(Hex.)
n7-01 Damping Gain for Low
Frequency
(3111)
Expert
Note:
• If oscillation occurs in the low speed range, increase the acceleration time or increase the setting value in 0.5-unit increments.
• To get starting torque with the setting for C4-01 [Torque Compensation Gain], decrease the setting value in 0.3-unit increments.
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n7-05: Response Gain for Load Changes
No.
Name
(Hex.)
n7-05 Response Gain for Load
Changes
(3115)
Expert
Note:
To make tracking related to load changes better, increase the setting value in 5-unit increments. If oscillation occurs during load changes,
decrease the setting value in 5-unit increments.
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n7-07: Speed Calculation Gain1
No.
Name
(Hex.)
n7-07 Speed Calculation Gain1
(3117)
Expert
■
n7-08: Speed Calculation Gain2
No.
Name
(Hex.)
n7-08 Speed Calculation Gain2
(3118)
Expert
Note:
When you increase the setting value, you can do a speed search of a motor rotating at a high frequency. If the setting value is too high, the
calculated speed will oscillate and a restart will fail. Decrease the setting value in these conditions.
■
n7-10: Pull-in Current Switching Speed
No.
Name
(Hex.)
n7-10 Pull-in Current Switching
Speed
(311A)
Expert
Note:
• The value set in n8-51 [Pull-in Current @ Acceleration is enabled for speeds that are not higher than n7-10 during deceleration. The value
set in b8-01 [Energy Saving Control Selection] is enabled for speeds higher than n7-10.
• If there is a large quantity of oscillation when you operate in the low speed range, increase the setting value.
• When it is most important to save energy in the low speed range, decrease the setting value.
498
V/f CL-V/f OLV CLV AOLV
Sets the oscillation suppression gain for the low speed range.
V/f CL-V/f OLV CLV AOLV
Sets the response gain related to changes in the load.
V/f CL-V/f OLV CLV AOLV
Sets the speed calculation gain during usual operation. Usually it is not necessary to change this
setting.
V/f CL-V/f OLV CLV AOLV
Sets the speed calculation gain during a speed search.
V/f CL-V/f OLV CLV AOLV
Parameter n8-51 [Pull-in Current @ Acceleration], is in effect when the output frequency is ≤ n7-10,
where the speed is set as a percentage of rated speed.
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
YASKAWA TOEPYAIGA8002B GA800 Drive Programming
Default
(Range)
1.0
(0.1 - 10.0)
Default
(Range)
100
(10 - 1000)
Default
(Range)
15.0 Hz
(1.0 - 50.0 Hz)
Default
(Range)
25.0 Hz
(1.0 - 50.0 Hz)
Default
(Range)
10.0%
(0.0 - 100.0%)