Delta VFD300C43S-HS User Manual page 289

Minimum Output Voltage of Motor 2

Settings
 The V/F curve setting is usually set by the motor's allowable loading characteristics. If the loading
characteristics exceeds the loading limit of the motor, you must pay more attention to the heat
dissipation, dynamic balance, and bearing lubrication of the motor.
 If the voltage is too high when the motor is at low frequencies, it may cause motor damage,
overheating, and may trigger stalling or over-current protection. To prevent motor damage or
motor fault, be careful when you set the voltage.
 Pr. 01-35 to Pr. 01-42 is the V/F curve for the motor 2. When the multi-function input terminals Pr.
02-01–02-08 and Pr. 02-26–Pr. 02-31 are set to 14 and enabled, the AC motor drive acts as the
second V/F curve.
 The diagram below shows the V/F curve for motor 1. You can also find the V/F curve for motor 2
from the same diagram.
Start-Up Frequency
Settings

The upper limit of setting range is the same as Pr. 01-00 maximum operation frequency.
 When the starting frequency is higher than the minimum output frequency, the drives' output is
from the starting frequency to the setting frequency. Refer to the following diagram for details.
Fcmd: frequency command
Fstart: start frequency (Pr. 01-09)
fstart: actual start frequency of drive
Fmin: 4th output frequency setting (Pr. 01-07 / Pr. 01-41)
Flow: output frequency lower limit (Pr. 01-11)
 When Fcmd > Fmin and Fcmd < Fstart:
If Flow < Fcmd, drive runs directly by Fcmd.
If Flow ≥ Fcmd, drive runs by Fcmd, then rises to Flow according to acceleration time.
 The output frequency goes directly to 0 when decelerating to Fmin.
0.0–480.0 V
0.0–1500.0 Hz
12.1-01-3
Chapter 12 Description of Parameter SettingsC2000-HS
Default: 2.0
Default: 0.5