12.3 C: TUNING
572 SIEPYEUOQ2A01A AC Drive Q2A Technical Manual
■ C3-05 Vout Limit Selection
No.
(Hex.)
Name Description
Default
(Range)
C3-05
(0213)
Vout Limit Selection
Sets the automatic reduction of motor magnetic flux when the output voltage is saturated.
0
(0, 1)
Make sure that the drive has sufficient output current capacity before you enable this parameter. When this
parameter is 0 [Disabled], the drive increases the output current to a maximum of 10% when the motor is running
at constant speed. The drive will also decrease flux and increase current to compensate torque.
Enable this parameter to increase speed precision when you move heavy loads at high speeds in these conditions:
• Power supply voltage is low
• Motor rated voltage is high
Do not enable this parameter in these conditions:
• Operating a motor in the middle speed range or low speed range
• Power supply voltage is a minimum of 10% more than the motor rated voltage
When this parameter is enabled, you could possibly not have accurate torque control if the power supply voltage
is much less than the motor rated voltage.
0 : Disabled
1 : Enabled
■ C3-16 Vout Limit Start Level
No.
(Hex.)
Name Description
Default
(Range)
C3-16
(0261)
Expert
Vout Limit Start Level
Sets the modulation factor that starts the output voltage limit operation when C3-05 = 1 [Vout
Limit Selection = Enabled].
90.0%
(70.0 - 90.0%)
■ C3-17 Vout Limit Max Level
No.
(Hex.)
Name Description
Default
(Range)
C3-17
(0262)
Expert
Vout Limit Max Level
Sets the modulation factor used with C3-18 [Vout Limit Level] for the output voltage limit
operation when C3-05 = 1 [Vout Limit Selection = Enabled].
100.0%
(85.0 - 100.0%)
■ C3-18 Vout Limit Level
No.
(Hex.)
Name Description
Default
(Range)
C3-18
(0263)
Expert
Vout Limit Level
Sets the maximum drop width of the voltage reference when C3-05 = 1 [Vout Limit Selection =
Enabled].
90.0%
(50.0 - 100.0%)
■ C3-21 M2 Slip Comp Gain
No.
(Hex.)
Name Description
Default
(Range)
C3-21
(033E)
RUN
M2 Slip Comp Gain
Sets the gain for the motor 2 slip compensation function. Usually it is not necessary to change this
setting.
Determined by E3-01
(0.0 - 2.5)
Note:
Correctly set these parameters before changing the slip compensation gain:
• E4-01 [M2 Rated Current (FLA)]
• E4-02 [M2 Rated Slip] (Set during Auto-Tuning when E3-01 = 2 [M2 Control Method Selection = OLVector])
• E4-03 [M2 No-Load Current]
It can be necessary to adjust this parameter in these conditions:
• If the motor speed is slower than the frequency reference, increase C3-01 in 0.1 unit increments.
• If the motor at constant speed is faster than the frequency reference, decrease C3-01 in 0.1 unit increments.
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