ABB ACS850 series, Manual

Page: 217 / 370

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)