Honeywell VFD CORE

CHAPTER 12: DESCRIPTION OF PARAMETER SETTINGS
63-4528—04 140
• When setting to 0, refer to Pr.01-01~01-08 for motor 1 V/f curve. For motor 2, refer to Pr.01-35~01-42.
• When setting to 1 or 2, the 2
nd
and the 3
rd
voltage frequency setting are invalid.
• If a motor load is a variable torque load (the torque is in direct proportion to the speed, such as the load of a fan or a pump), it
will 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 the higher power V/F curve, low frequency torque will be even lower so it is not suitable for fast acceleration/
deceleration. It is recommended NOT to apply this parameter for any fast acceleration/deceleration.
• This parameter helps to decrease efficiently the mechanical vibration when a motor starts/stops a load. It auto-detects the
torque size of a load, then it will accelerate to reach the frequency of your setting within the shortest time and the smoothest
start-up current. It can also auto-detect the re-generated voltage of a load, and then it will decelerate to stop the motor within
the shortest time and in a smoothest way.
• 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 so a brake resistor is not required. In addition, it can improve the operation efficiency and save
energy.
• Setting 3 Auto accel./decel. (auto calculation of the accel./decel. time by actual load): this setting helps to decrease efficiently
the mechanical vibration when the drive starts/stops a load. It auto-detects the torque size of a load, then it will accelerate to
reach the frequency of your setting within the shortest time and the smoothest start-up current. It can also auto-detect the re-
generated voltage of a load, and then it will decelerate to stop the drive within the shortest time and in a smoothest way.
01 – 35 V/F Curve Selection
Factory Setting: 2
Settings 0: V/F curve determined by group 01
1: 1.5 power curve
2: Square curve
a
01 – 36 Optimal Acceleration/Deceleration Setting
Factory Setting: 0
Settings 0: Linear accel. /decel.
1: Auto accel., Linear decel.
2: Linear accel., Auto decel.
3: Auto accel. / decel.
4: Linear, stall prevention by auto accel./decel. (limit by
M33619
VOLTAGE %
FREQUENCY %
01-02
01-01
100
90
80
70
60
50
40
30
20
10
0
20 40 60 80 100
SQUARE CURVE
1.5 POWER CURVE