Delta VFD004L11A User Manual page 24

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VFD-L Series
1 - 08 Lower Bound of Output Frequency
Settings
The Upper/Lower Bound is to prevent operation error and machine damage.
If the Upper Bound of Output Frequency is 50Hz and the Maximum Output Frequency
is 60Hz, the Maximum Output Frequency will be limited to 50Hz.
If the Lower Bound of Output Frequency is 10Hz, and the Minimum Output Frequency
Pr.1-05
generate a 10Hz output from the drive.
This parameter must be equal to or less than the Upper Bound of Output Frequency
(Pr.1-07).
1 - 09 Acceleration Time 1 (Taccel 1)
1 - 10 Deceleration Time 1 (Tdecel 1)
1 - 11 Acceleration Time 2 (Taccel 2)
1 - 12 Deceleration Time 2 (Tdecel 2)
Settings
These parameters can be set during operation.
Pr.1-09. This parameter is used to determine the time required for the AC drive to ramp
from 0 Hz to its Maximum Output Frequency (Pr.1-00). The rate is linear unless
S-Curve is "Enabled."
Pr.1-10. This parameter is used to determine the time required for the AC drive to
decelerate from the Maximum Output Frequency (Pr.1-00) down to 0 Hz. The rate is
linear unless S-Curve is "Enabled."
The accel/decel time 2 determines the time for the AC drive to accel/decel from 0Hz to
Maximum Output Frequency (Pr.1-00) (accel/decel time 1 is the default).
Multi-Function Input terminals must be programmed to select accel/decel time 2 and
the terminals must be closed to select accel/decel time 2. See Pr.4-04 to Pr.4-08.
In the diagram shown below, the accel/decel time of the AC drive is the time between 0
Hz to Maximum Output Frequency (Pr.1-00). Suppose the Maximum Output Frequency
is 60 Hz, start-up frequency (Pr.1-05) is 1.0 Hz, and accel/decel time is 10 seconds.
The actual time for the AC drive to accelerate from start-up to 60 Hz is 9.83 seconds
and the deceleration time is also 9.83 seconds.
d 0 to d100%
is set at 1.0Hz, then any Command Frequency between 1-10Hz will
d 0.1 to d 600Sec
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Factory Setting : d10.0
Factory Setting : d10.0
Factory Setting : d10.0
Factory Setting : d10.0
5-6
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Factory Setting: d 0
Unit: 1%
Unit: 0.1Sec
A