Chapter 5 Parameters
VFD-E Series
5-30 Revision August 2006, 01EE, SW--PW V1.03/CTL V2.03
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.
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 aAcceleration Time 1 (Taccel 1) Unit: 0.1/0.01
01.10 aDeceleration Time 1 (Tdecel 1) Unit: 0.1/0.01
01.11 aAcceleration Time 2 (Taccel 2) Unit: 0.1/0.01
01.12 aDeceleration 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
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.
In the diagram shown below, the Acceleration/Deceleration Time of the AC motor drive is the
time between 0 Hz to Maximum Output Frequency (Pr.01.00). Suppose the Maximum Output
Frequency is 60 Hz, Minimum Output Frequency (Pr.01.05) is 1.0 Hz, and
Acceleration/Deceleration Time is 10 seconds. The actual time for the AC motor drive to
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