N2: Speed Feedback Detection Control (Afr) Tuning - YASKAWA GA700 Technical Manual

11.10 n: Special Adjustment
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n1-16: High carry Hunt Prev Gain
No.
Name
(Hex.)
n1-16 High carry Hunt Prev
Gain
(0BFB)
Effective with a setting of n1-01 = 2 [Hunting Prevention Selection = Enable (High carry)].
If the motor oscillates, set n1-01 = 2. If there is no discernible effect, increase n1-16 in increments of 0.2.
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n1-17: Hunt Prev Time
No.
Name
(Hex.)
n1-17 Hunt Prev Time
(0BFC)
When set to n1-01 = 2 [Hunting Prevention Selection = Enable (High carry)], if the motor stalls when the load
changes, increase the value set in n1-17 in increments of 100 ms.
If hunting cannot be suppressed even when set to n1-01 = 2, increase the value set in n1-17 in increments of 100
ms.
◆

n2: Speed Feedback Detection Control (AFR) Tuning

The speed feedback detection reduction function (or AFR: Automatic Frequency Regulator) helps achieve speed
stability when a load is suddenly applied or removed.
Note:
Perform either of the following procedures before changing n2-xx.
• Set the motor parameters and V/f pattern correctly.
• Perform Rotational Auto-Tuning.
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n2-01: SpdFeedbackDetectCtr (AFR) Gain
No.
Name
(Hex.)
n2-01 SpdFeedbackDe
tectCtr (AFR) Gain
(0584)
Adjust in the following situations.
• If hunting or oscillation occurs under light loads, increase the setting value in steps of 0.05 while checking the
response.
• When torque is insufficient under heavy loads or to improve torque or speed responsiveness, decrease the
setting value in steps of 0.05 while checking the response.
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n2-02: SpdFeedbackDetCtr(AFR)TimeConst1
No.
Name
(Hex.)
n2-02 SpdFeedbackDetCtr
(AFR)TimeConst1
(0585)
Adjust in the following situations.
• If hunting or oscillation occurs under light loads, increase the setting value in steps of 50 ms while checking the
response. Increase the setting value in steps of 50 ms while checking the response when the load inertia is
significant.
• When torque is insufficient under heavy loads or to improve torque or speed responsiveness, decrease the
setting value in steps of 10 ms while checking the response.
876
V/f CL-V/f OLV CLV AOLV
Adjusts the behavior of the hunting prevention function. This is most
effective when a high carrier frequency has been set. Normally there is no
need to configure this setting.
V/f CL-V/f OLV CLV AOLV
Adjusts the responsiveness of the hunting prevention function. Normally
there is no need to configure this setting.
V/f CL-V/f OLV CLV AOLV
This parameter sets the gain of the AFR function as a magnification value.
Normally there is no need to change this setting.
V/f CL-V/f OLV CLV AOLV
This parameter sets the time constant that determines the rate of change for
the AFR function. Normally there is no need to change this setting.
YASKAWA ELECTRIC SIEP C710617 01B YASKAWA AC Drive GA700 Technical Manual
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
Default Setting
(Range)
0.50
(0.00 - 2.50)
Default Setting
(Range)
500 ms
(0 - 1000 ms)
Default
(Range)
1.00
(0.00 - 10.00)
Default Setting
(Range)
50 ms
(0 - 2000 ms)