VFD68 Variable Frequency Drives (230 or 460 VAC)
27
VFD68Bxx and VFD68Cxx Drive Basic and Advanced Parameters
You can use the default parameter setting with the P499RxP-107C transducer and R410a refrigerant within a
range of operation that depends on the specific model of P499 transducer selected. All other applications
require some parameter changes and may require different transducers.
The parameters shown highlighted in gray in Table 19 are the advanced parameters. To view and change
these parameters, change P.160 from 9999 to 0.
Table 19: Basic and Advanced Parameter Descriptions for VFD68Bxx and VFD68Cxx Drives
(Part 1 of 4)
Parameter
Indication
on Monitor
Description
Range
VFD68xxx-2
Defaults
P. 0
Torque Boost:
Defines the voltage (% total V) applied to the
motor when the drive starts the motor at 0 Hz.
0–30%
6%/4%/3%
P. 1
Maximum Frequency:
Defines the maximum speed of the
motor in your application. See Figure 18.
0–120 Hz
60 Hz
P. 2
Minimum Frequency:
Defines the minimum speed of the motor
in your application. See
0–120 Hz
12.5 Hz
P. 3
Base Frequency:
Set parameter to the rated frequency [Hz] on
motor rating plate.
0–400 Hz
60 Hz
P. 4
High Speed:
The speed, or frequency, that the VFD68 output
drives the attached motor when terminal RH is connected to
terminal SD (common).
0–400 Hz
40 Hz
P. 5
Middle Speed:
The speed, or frequency, that the VFD68 output
drives the attached motor when terminal RM is connected to
terminal SD (common).
0–400 Hz
20 Hz
P. 6
Low Speed:
The speed, or frequency, that the VFD68 output
drives the attached motor when terminal RL is connected to
terminal SD (common).
0–400 Hz
10 Hz
P. 7
Acceleration Time:
Defines the time required to accelerate
from stop (0 Hz) to full rated RPM (60 Hz).
0–3600 seconds
15 seconds
P. 8
Deceleration Time:
Defines the time required to decelerate
from full rated RPM (60 Hz) to stop (0 Hz).
0–3600 seconds
15 seconds
P. 9
Motor Rated Current:
Set parameter to the rated FLA (full load
amperes) on motor rating plate.
0–500 A
Rated VFD68
Output
P. 19
Base Frequency Voltage:
Defines drive's maximum output
voltage relative to the drive's supply voltage. (9999: drive's
maximum output voltage is the same as the drive's power
supply voltage.)
0–1000V, 9999
9999
P. 20
Acceleration/Deceleration Reference Frequency:
Defines
the high end frequency for P. 7 and P. 8.
0–400 Hz
60 Hz
P. 22
Stall Prevention Output Current Level:
Defines the current
level (as a percent of motor FLA) at which the drive begins to
adjust the output frequency (Hz) to reduce the output current.
0–200%
150%
P. 31
Frequency Jump 1A:
Frequency Jump parameters (P. 31 and
P. 32) are used to set the low speed behavior of the drive. This
parameter typically remains at 0 Hz.
0–400 Hz, 9999
0 Hz
P. 32
Frequency Jump 1B:
maximum frequency to skip over to avoid
very low fan airflow and unnecessary motor overheating (9999:
frequency jump not enabled.)
Ensure that P. 32 is set equal to C. 2 and C. 5
0–400 Hz, 9999
12.5 Hz
P. 33
Frequency Jump 2A:
To avoid resonance noise caused by
natural frequency of mechanical system, enter frequency just
below
noisy frequency 2.
0 to 400 Hz, 9999
9999
