2.9 n: Special Adjustments
224 YASKAWA ELECTRIC TOEP C710687 03B FSDrive-MV1000 Parameter Guide
u n2: Speed Feedback Detection Control (AFR) Tuning
These parameters are used to achieve speed stability when a load is suddenly applied or removed.
Note: Before making changes to the AFR parameters, make sure all motor parameters are set properly or perform Auto-Tuning.
n n2-01: Speed Feedback Detection Control (AFR) Gain
Sets the internal speed feedback detection control gain in the AFR.
Normally there is no need to adjust n2-01 from the default setting. Make adjustments in the following cases:
• If hunting occurs, increase the setting value in steps of 0.05 while checking the response.
• If response is low, decrease the setting value in steps of 0.05 while checking the response.
n
n2-02, n2-03: Speed Feedback Detection Control (AFR) Time Constant 1, 2
Parameter n2-02 sets the time constant normally used by AFR.
Parameter n2-03 sets the time constant during Speed Search or regenerative operation.
Note: Setting parameter n2-02 higher than n2-03 will trigger an oPE08 error.
These parameters rarely need to be changed. Adjust settings only under the following conditions:
• If hunting occurs, increase n2-02. If response is low, decrease it.
• Increase n2-03 if overvoltage occurs with high inertia loads at the end of acceleration or with sudden load changes.
• If setting n2-02 to a higher value, also increase C4-02 (Torque Compensation Delay Time 1) proportionally.
• If setting n2-03 to a higher value, also increase C4-06 (Torque Compensation Delay Time 2) proportionally.
n
n2-06: Speed Feedback Detection Control (AFR) Gain Switch Start Gain
Parameter n2-06 sets the gain-switching start gain for speed feedback detection control (AFR).
No. Name Setting Range Default
n2-01 Speed Feedback Detection Control (AFR) Gain 0.00 to 10.00 2.00
No. Name Setting Range Default
n2-02 Speed Feedback Detection Control (AFR) Time Constant 1 0 to 2000 ms 250 ms
n2-03 Speed Feedback Detection Control (AFR) Time Constant 2 0 to 2000 ms 750 ms
No. Name Setting Range Default
n2-06
Speed Feedback Detection Control (AFR) Gain Switch
Start Gain
0.00 to 2.00 1.00
MV1000ParameterGuide_E_conditional.book 224 ページ ２０１３年１０月１１日 金曜日 午後８時１８分
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