Delta Electronics AC Motor Drive VFD-EL - Manual (Page 76)

Chapter 4 Parameters|
Revision August 2008, 2ELE, V1.02 4-33
01.08 Output Frequency Lower Limit Unit: 0.1
Settings 0.0 to 100.0% Factory Setting: 0.0
The Upper/Lower Limits are to prevent operation errors and machine damage.
If the Output Frequency Upper Limit is 50Hz and the Maximum Output Frequency is 60Hz, the
Output Frequency will be limited to 50Hz.
If the Output Frequency Lower Limit is 10Hz, and the Minimum Output Frequency (Pr.01.05) is
set to 1.0Hz, then any Command Frequency between 1.0-10Hz will generate a 10Hz output
from the drive. If the command frequency is less than 1.0Hz, drive will be in ready status
without output.
This parameter must be equal to or less than the Output Frequency Upper Limit (Pr.01.07).
The Output Frequency Lower Limit value = (Pr.01.00 * Pr.01.08) /100.
01.09 Acceleration Time 1 (Taccel 1) Unit: 0.1/0.01
01.10 Deceleration Time 1 (Tdecel 1) Unit: 0.1/0.01
01.11 Acceleration Time 2 (Taccel 2) Unit: 0.1/0.01
01.12 Deceleration Time 2 (Tdecel 2) Unit: 0.1/0.01
Settings 0.1 to 600.0 sec / 0.01 to 600.0 sec Factory Setting: 10.0
Acceleration/deceleration time 1 or 2 can be switched by setting the external terminals MI3~
MI12 to 7 (set Pr.04.05~Pr.04.08 to 7 or Pr.11.06~Pr.11.11 to 7).
01.19 Accel/Decel Time Unit
Factory Setting: 0
Settings 0 Unit: 0.1 sec
1 Unit: 0.01 sec
The Acceleration Time is used to determine the time required for the AC motor drive to ramp
from 0 Hz to Maximum Output Frequency (Pr.01.00). The rate is linear unless S-Curve is
“Enabled”; see Pr.01.17.
The Deceleration Time is used to determine the time required for the AC motor drive to
decelerate from the Maximum Output Frequency (Pr.01.00) down to 0 Hz. The rate is linear
unless S-Curve is “Enabled.”, see Pr.01.18.
The Acceleration/Deceleration Time 1, 2, 3, 4 are selected according to the Multi-function Input
Terminals Settings. See Pr.04.05 to Pr.04.08 for more details.