N4: Adv. Open Loop Vector Tuning - Omron Q2A Series Technical Manual

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n3-21 OverExcBr Current Level
No.
Name
(Hex.)
n3-21 OverExcBr Current Level
(0579)
If flux saturation during Overexcitation Deceleration makes the motor current become more than the value set in
this parameter, the drive will automatically decrease the overexcitation gain. If oC [Overcurrent], oL1 [Motor
Overload], or oL2 [Drive Overloaded] occur during overexcitation deceleration, decrease the setting value.
If repetitive or long overexcitation deceleration cause the motor to overheat, decrease the setting value.
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n3-23 OverExcBr Operation
No.
Name
(Hex.)
n3-23 OverExcBr Operation
(057B)
1 : Enabled@Both directions
2 : Enabled@FW direction
3 : Enabled@REV direction
Note:
When n3-23 = 2, 3, the drive enables overexcitation only in the direction of motor rotation in which a regenerative load is applied.
Increased motor loss can decrease ov [Overvoltage] faults.
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n4: ADV. OPEN LOOP VECTOR TUNING

The following explains how to make special adjustments for Advanced Open Loop Vector [A1-02 = 4].
• First, perform Rotational Auto-Tuning.
• Operation that fluctuates around zero speed cannot be carried out when there is a load. For applications of this
sort, set A1-02 = 3 [CLVector].
• The tolerance of regenerative torque at low speeds is diminished. If regenerative torque is required in the low
speed range, set A1-02 = 3.
• This cannot be used for elevators or similar applications. There is a risk that the load could slip.
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n4-60 LoSpeed Comp Gain
No.
Name
(Hex.)
n4-60 LoSpeed Comp Gain
(1B80)
Note:
• To increase the torque precision in the motoring direction when you operate at low speeds, do Stationary Auto-Tuning for Line-to-Line
Resistance only, or increase the value of this parameter in 5% increments.
• If the output frequency changes when you operate at low speeds, do Stationary Auto-Tuning for Line-to-Line Resistance only. If it is
not better, increase this parameter in 10% increments. The recommended setting is 50% to 100%.
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n4-61 LoSpeed Comp Frequency Level
No.
Name
(Hex.)
n4-61 LoSpeed Comp Frequency
Level
(1B81)
SIEPYEUOQ2A01A AC Drive Q2A Technical Manual
V/f CL-V/f OLV CLV AOLV
Sets the upper limit of the current that is suppressed at the time of overexcitation deceleration,
where the drive rated current = 100% value.
V/f CL-V/f OLV CLV AOLV
Sets the direction of motor rotation where the drive will enable overexcitation.
V/f CL-V/f OLV CLV AOLV
Sets a compensation gain to improve the control qualities for motoring loads in the low speed
range.
V/f CL-V/f OLV CLV AOLV
Sets a frequency at which the settings for n4-60 [LoSpeed Comp Gain], n4-62 [Reg LoSpd Cmp
Gain] are enabled. When the output frequency < n4-61, the drive adjusts the torque to agree with
the settings for n4-60 and n4-62. Usually it is not necessary to change this setting.
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
12.9 n: SPECIAL
Default
(Range)
100%
(0 - 150%)
Default
(Range)
1
(1 - 3)
Default
(Range)
1.000
(0.500 - 2.000)
Default
(Range)
6.00 Hz
(0.50 - 12.00 Hz)
12
789