User Manual

5–13Programming
[DC Boost Select]
This parameter sets the level of DC Boost that will
be applied at low frequencies (typically 0-7 Hz).
Auto settings automatically measure motor
resistance and adjust the boost voltage to maintain
constant boost performance regardless of changing
motor temperature. This setting represents the
amount of voltage required to produce the percent of
drive rated current in a non-rotating motor (i.e. 45%).
If this boost voltage (typically used for faster
acceleration) is excessive for constant low speed
operation, it can be automatically reduced to
acceptable levels by programming [Run/Accel
Boost].
Refer to the diagram below.
Parameter Number 9
Parameter Type Read and Write
Factory Default “Auto 30%”
Units Display Drive
“Fan Sel #1” 0
see “Fan Select/No Boost” drawing.
“Fan Sel #2” 1 see “Fan Select/No Boost” drawing.
“No Boost” 2 see “Fan Select/No Boost” drawing.
“Auto 15%” 3 minimum auto boost
“Auto 30%” 4.
“Auto 45%” 5.
“Auto 60%” 6.
“Auto 75%” 7.
“Auto 90%” 8.
“Auto 105%” 9.
“Auto 120%” 10
maximum auto boost
“Full Custom” 11 see “Full Custom” drawing below
“Fixed” 12 see “Fixed” drawing below
Base
Voltage
0
0
Base Frequency
100%
50%
42%
35%
100%50%
Fan 1
Fan 2
No Boost
Voltage
0
0
Frequency
Motor Rated Maximum
Start Boost
Break Voltage
Break Frequency
Maximum
Base Voltage
Base Frequency
Maximum Voltage
Maximum Frequency
Motor Rated
Full Custom Fixed
Fan Select 1 & 2/No Boost
Voltage
0
0
Frequency
Run Boost
Start Boost
B
A
Base Voltage
Base Frequency
[Start Boost]
This parameter sets the DC start boost level for
acceleration when [DC Boost Select] is set to “Fixed”
or “Full Custom.”
Parameter Number 48
Parameter Type Read and Write
Display Units / Drive Units 1 Volt / 4096 = Drive Rtd Volts
Factory Default 0 Volts
Minimum Value 0 Volts
Maximum Value 9.5% of Drive Rated Voltage
[Run Boost]
This parameter sets the DC boost level for constant
speed level when [DC Boost Select] is set to “Fixed”.
Parameter Number 83
Parameter Type Read and Write
Display Units / Drive Units 1 Volt / 4096 = Drive Rtd Volts
Factory Default 0 Volts
Minimum Value 0 Volts
Maximum Value 9.5% of Drive Rated Voltage
Advanced Setup