Delta C200 Series User Manual page 123

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When setting to 0, refer to Pr.01-01~01-08 for motor 1 V/f curve. For motor 2, please refer to
Pr.01-35~01-42.
When setting to 1 or 2, 2
If motor load is variable torque load (torque is in direct proportion to speed, such as the load of fan
or pump), it can decrease input voltage to reduce flux loss and iron loss of the motor at low speed
with low load torque to raise the entire efficiency.
When setting higher power V/f curve, it is lower torque at low frequency and is not suitable for rapid
acceleration/deceleration. It is recommended Not to use this parameter for the rapid
acceleration/deceleration.
Optimal Acceleration/Deceleration Setting
Settings 0: Linear accel./decel.
Pr.01-44 is used to reduce the drive's vibration during load starts and stops. Also it will speed up to
the setting frequency with the fastest and smoothest start-up current when it detects small torque.
At deceleration, it will auto stop the drive with the fastest and the smoothest deceleration time when
the regenerated voltage of the load is detected.
Setting 0 Linear accel./decel.: it will accelerate/decelerate according to the setting of
Pr.01-12~01-19.
Setting to Auto accel./decel.: it can reduce the mechanical vibration and prevent the complicated
auto-tuning processes. It won't stall during acceleration and no need to use brake resistor. In
addition, it can improve the operation efficiency and save energy.
Setting 3 Auto accel./decel. (auto calculate the accel./decel. time by actual load): it can auto detect
the load torque and accelerate from the fastest acceleration time and smoothest start current to the
setting frequency. In the deceleration, it can auto detect the load re-generation and stop the motor
smoothly with the fastest decel. time.
Setting 4 Stall prevention by auto accel./decel. (limited by 01-12 to 01-21): if the
acceleration/deceleration is in the reasonable range, it will accelerate/decelerate by
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nd rd
and 3 voltage frequency setting are invalid.
01-02
Voltage %
100
90
80
1.5 power c urve
70
60
50
40
30
20
Square curve
10
0
20 40
1: Auto accel., linear decel.
2: Linear accel., auto decel.
3: Auto accel./decel. (auto calculate the accel./decel. time by actual load)
4: Stall prevention by auto accel./decel. (limited by 01-12 to 01-21)
11-24
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Chapter 11 Description of Parameter Settings|C200 Series
01-01
F requenc y%
80 100
60
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Factory Setting: 0
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