12.10 n: Special Adjustment
926 YASKAWA SIEPC71061705H GA700 Series Technical Manual
■ n4-65: Flux Estimate Response@High Freq
No.
(Hex.)
Name Description
Default
(Range)
n4-65
(1B85)
Flux Estimate
Response@High Freq
Sets the responsiveness of the magnetic flux estimation in high speed ranges, where the output
frequency is ≥ n4-67 [Estimate Gain Switchover Freq]. Usually it is not necessary to change this
setting.
1.00
(0.50 - 3.00)
If the drive detects oS [Overspeed] in no-load conditions, or if the speed does not become stable in the high speed
range, increase or decrease the setting value in 0.05 unit increments.
■ n4-66: Flux Estimate Response @Low Freq
No.
(Hex.)
Name Description
Default
(Range)
n4-66
(1B86)
Flux Estimate Response
@Low Freq
Sets the responsiveness of the magnetic flux estimation in low speed ranges, where 0 ≤ the output
frequency, which is < n4-67 [Estimate Gain Switchover Freq]. Usually it is not necessary to
change this setting.
1.50
(0.50 - 3.00)
If the drive detects oS [Overspeed] in no-load conditions, or if the speed does not become stable in the low speed
range, increase or decrease the setting value in 0.05 unit increments.
■ n4-67: Estimate Gain Switchover Freq
No.
(Hex.)
Name Description
Default
(Range)
n4-67
(1B87)
Estimate Gain Switchover
Freq
Sets the switching frequency for estimation gain for these parameters:
n4-63 [Speed EstimateResponse@High Freq]
n4-64 [Speed Estimate Response@Low Freq]
n4-65 [Flux Estimate Response@High Freq]
n4-66 [Flux Estimate Response @Low Freq]
Usually it is not necessary to change this setting.
6.00 Hz
(0.00 - E1-04 setting)
When the output frequency ≥ n4-67, the drive will select n4-63 and n4-65. When the output frequency < n4-67,
the drive will select n4-64 and n4-66.
■ n4-68: Speed Estimation Filter Time
No.
(Hex.)
Name Description
Default
(Range)
n4-68
(1B88)
Speed Estimation Filter
Time
Sets the primary delay time constant for the speed estimation value. Usually it is not necessary to
change this setting.
0.001 s
(0.001 - 0.010 s)
If the motor speed oscillates in the high speed range, set the value to 0.010 s.
■ n4-69: Flux Control Response
No.
(Hex.)
Name Description
Default
(Range)
n4-69
(1B89)
Flux Control Response
Unifies control of magnetic flux to make motor vibrations more stable.
1.00
(0.00 - 60.00)
If step-out occurs when the load changes, decrease the setting value in 1.00 increments.
Note:
If heavy loads decrease motor speed, increase the setting value in 1.00 increments. If it does not get better, increase n4-74 [Limit of Flux
Loop] in 20% increments.
■ n4-70: Speed Command Comp @ Low Freq
No.
(Hex.)
Name Description
Default
(Range)
n4-70
(1B8A)
Speed Command Comp @
Low Freq
Sets the function to make the drive more stable when operating at low speeds. Usually it is not
necessary to change this setting.
1.00 Hz
(0.00 - 6.00 Hz)
This function makes the control more stable when you operate at low speeds.
• If the load is light when the drive operates in the low speed range, increase the setting value in 0.3 Hz
increments.
To Next Page
Loading...
