6-3
Programming Your Application
650V AC Drive
MMI Parameters Table
Display
Parameter
Description
Range
Default
NORMAL DUTY
TIME (s)
150%
% OF RATED MOTOR CURRENT
30
60
100% overload for 30s (Heavy Duty)
127.5%
105%
100%
FALSE - HEAVY DUTY: Inverse time allows 150%
overload for 30s, then ramps back the current
limit to 105% over a 10s period. At a lower load,
the overload area remains the same, e.g. at
127.5% load for 60s - after 60s has expired, the
output of the inverse time function is ramped back
over a 10s period from 150% as before.
TRUE - NORMAL DUTY: current limit is set to
110% motor current, inverse time delay is set to
30s
When
P
11 is changed from FAN LAW to LINEAR
LAW,
P
12 is set to 0 (HEAVY DUTY)
When
P
11 is changed from LINEAR LAW to FAN
LAW,
P
12 is set to 1 (NORMAL DUTY)
P
12 can be changed independently
0=FALSE
1=TRUE
0
FIXED BOOST
M
VF
Used to correctly flux the motor at low speeds. This
allows the drive to produce greater starting torque
for high friction loads. It increases the motor volts
above the selected V/F characteristic at the lower
end of the speed range
OUTPUT VOLTS
FREQUENCY
f B
25%
100%
BOOST
f B
= BASE FREQUENCY
0%
INCREASING
INCREASED
TORQUE
CONSTANT
POWER RANGE
FLUXING
NORMAL FLUXING
0.00 to 25.00%
product
code
dependent
AUTO BOOST
M
VF
This parameter allows for load dependent, stator
resistance voltage-drop compensation. This
correctly fluxes the motor (under load conditions)
at low output frequencies, thereby increasing
available motor torque. AUTO BOOST is only
used when BOOST MODE is set to 0.
The value of the AUTO BOOST parameter
determines the level of additional volts supplied to
the motor for 100% load.
Setting the value of AUTO BOOST too high can
cause the drive to enter current limit. If this occurs,
the time taken for the drive to reach operating
speed will be extended. Reducing the value of
AUTO BOOST will eliminate this problem.
0.00 to 25.00%
0.00 %
PASSWORD
A password may be set to prohibit unauthorised
adjustment of parameters. When
P
99 is set to
non-zero you will be required to match this value
before parameters can be adjusted
0000 – FFFF
0000
NORMAL DUTY was
previously referred to
as Quadratic Torque in
past Drives' manuals.
