ABB ACS850 - Flux Ref

Parameters 217
36.23 Timed func3 Selects which time periods (1…4) are used with timed
function 3. Also determines whether boost is used with timed
function 3.
The parameter is a 16-bit word with each bit corresponding to
a function. Whenever a bit is set to 1, the corresponding
function is in use.
The bits of the binary number correspond to the following
functions:
36.24 Timed func4 Selects which time periods (1…4) are used with timed
function 4. Also determines whether boost is used with timed
function 4.
The parameter is a 16-bit word with each bit corresponding to
a function. Whenever a bit is set to 1, the corresponding
function is in use.
The bits of the binary number correspond to the following
functions:
38
38 Flux ref
Flux reference and U/f curve settings. See also section User-
definable U/f curve on page 67.
38.01 Flux ref Sets the flux reference (in percent of parameter 99.08 Mot
nom freq) at field weakening point.
0 … 200% Flux reference at field weakening point. 1 = 1%
38.03 U/f curve func Selects the form of the U/f (voltage/frequency) curve below
the field weakening point.
Note: This functionality can be used in scalar control only, i.e.
when 99.05 Motor ctrl mode setting is Scalar.
Linear Linear U/f curve. Recommended for constant-torque
applications.
0
Quadratic Quadratic U/f curve. Recommended for centrifugal pump and
fan applications.
1
User Custom U/f curve. The curve is formed by the points defined
by parameters 38.04…38.13.
2
38.04 U/f curve freq1 Defines the frequency at the 1st point on the custom U/f curve
in percent of parameter 99.08 Mot nom freq. In use when
38.03 U/f curve func is set to User.
1 … 500% 1st point, frequency. 1 = 1%
38.05 U/f curve freq2 Defines the frequency at the 2nd point on the custom U/f
curve in percent of parameter 99.08 Mot nom freq.
No. Name/Value Description FbEq
Bit Function
0 Timer1 ena (Time period 1 enable)
1 Timer2 ena (Time period 2 enable)
2 Timer3 ena (Time period 3 enable)
3 Timer4 ena (Time period 4 enable)
4 Boost ena (Boost enable)
Bit Function
0 Timer1 ena (Time period 1 enable)
1 Timer2 ena (Time period 2 enable)
2 Timer3 ena (Time period 3 enable)
3 Timer4 ena (Time period 4 enable)
4 Boost ena (Boost enable)