Omron Q2A Series Technical Manual page 788

12.9 n: SPECIAL
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n3-03 HSB DwellTime@Stop
No.
Name
(Hex.)
n3-03 HSB DwellTime@Stop
(058A)
Expert
If there is too much inertia or when the motor is coasting to a stop after high-slip braking is complete, increase the
setting value. If the setting value is too low, machine inertia can cause the motor to rotate after high-slip braking is
complete.
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n3-04 HSB Overload Time
No.
Name
(Hex.)
n3-04 HSB Overload Time
(058B)
Expert
If a force on the load side is rotating the motor or if there is too much load inertia connected to the motor, the
drive will detect oL7.
The current flowing to the motor from the load can overheat the motor and cause burn damage to the motor. Set
this parameter to prevent burn damage to the motor.
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n3-13 OverExcBr Gain
No.
Name
(Hex.)
n3-13 OverExcBr Gain
(0531)
The V/f pattern output value goes back to its usual level after the motor stops or accelerates again to the frequency
reference speed.
The best value of this parameter changes when the flux saturation characteristics of the motor change.
• Gradually increase the value of n3-13 to 1.25 or 1.30 to increase the braking power of Overexcitation
Deceleration. If the gain is too much, the motor can have flux saturation and cause a large quantity of current to
flow. This can increase the deceleration time.
• Decrease the setting value if flux saturation causes overcurrent. If you increase the setting value, the drive can
detect oC [Overcurrent], oL1 [Motor Overload], and oL2 [Drive Overload]. Decrease the value of n3-21
[OverExcBr Current Level] to prevent oC and oL.
• Regular use of overexcitation deceleration or extended periods of overexcitation deceleration can increase
internal motor temperatures. Decrease the setting value in these conditions.
• If ov [Overvoltage] occurs, increase the deceleration time.
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n3-14 OverExcBr Harmonics Selection
No.
Name
(Hex.)
n3-14 OverExcBr Harmonics
Selection
(0532)
Expert
Enable this parameter to set a shorter deceleration time.
Note:
• If you frequently use overexcitation deceleration on a motor, the motor loss will increase the risk of burn damage.
• When you set this parameter to 1, the motor can make a loud excitation sound during overexcitation deceleration. If the excitation
sound is unwanted, set this parameter to 0 to disable the function.
0 : Disabled
1 : Enabled
The drive injects harmonic signals at the time of overexcitation deceleration. You can decrease the deceleration
time because motor loss increases.
788
V/f CL-V/f OLV CLV AOLV
Sets the dwell time, a length of time when high-slip braking is ending and during which the motor
speed decreases and runs at a stable speed. For a set length of time, the drive will hold the actual
output frequency at the minimum output frequency set in E1-09.
V/f CL-V/f OLV CLV AOLV
Sets the time used to detect oL7 [High Slip Braking Overload], which occurs when the output
frequency does not change during high-slip braking. Usually it is not necessary to change this
setting.
V/f CL-V/f OLV CLV AOLV
Sets the gain value that the drive multiplies by the V/f pattern output value during overexcitation
deceleration to calculate the overexcitation level.
V/f CL-V/f OLV CLV AOLV
Sets the function that injects harmonic signals during overexcitation deceleration.
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
SIEPYEUOQ2A01A AC Drive Q2A Technical Manual
Default
(Range)
1.0 s
(0.0 - 10.0 s)
Default
(Range)
40 s
(30 - 1200 s)
Default
(Range)
1.10
(1.00 - 1.40)
Default
(Range)
0
(0, 1)