ABB ACS880-104

288 Parameters
28.21 Constant frequency
function
Determines how constant frequencies are selected, and
whether the rotation direction signal is considered or not
when applying a constant frequency.
0000b
0000b…0011b Constant frequency configuration word. 1 = 1
28.22 Constant frequency
sel1
When bit 0 of parameter 28.21 Constant frequency function is
0 (Separate), selects a source that activates constant
frequency 1.
When bit 0 of parameter 28.21 Constant frequency function is
1 (Packed), this parameter and parameters 28.23 Constant
frequency sel2 and 28.24 Constant frequency sel3 select
three sources whose states activate constant frequencies as
follows:
Not selected
Not selected 0. 0
Selected 1. 1
DI1 Digital input DI1 (10.02 DI delayed status, bit 0). 2
DI2 Digital input DI2 (10.02 DI delayed status, bit 1). 3
DI3 Digital input DI3 (10.02 DI delayed status, bit 2). 4
DI4 Digital input DI4 (10.02 DI delayed status, bit 3). 5
DI5 Digital input DI5 (10.02 DI delayed status, bit 4). 6
No. Name/Value Description Def/FbEq16
Bit Name Information
0 Constant freq
mode
1 = Packed: 7 constant frequencies are selectable using the three
sources defined by parameters 28.22, 28.23 and 28.24.
0 = Separate: Constant frequencies 1, 2 and 3 are separately activated
by the sources defined by parameters 28.22, 28.23 and 28.24
respectively. In case of conflict, the constant frequency with the smaller
number takes priority.
1Direction
enable
1 = Start dir: To determine running direction for a constant frequency, the
sign of the constant frequency setting (parameters 28.26…28.32) is
multiplied by the direction signal (forward: +1, reverse: -1). This
effectively allows the drive to have 14 (7 forward, 7 reverse) constant
frequencies if all values in 28.26…28.32 are positive.
WARNING: If the direction signal is reverse and the active
constant frequency is negative, the drive will run in the forward
direction.
0 = According to Par: The running direction for the constant frequency is
determined by the sign of the constant speed setting (parameters
28.26…28.32).
Source defined
by par. 28.22
Source defined
by par. 28.23
Source defined
by par. 28.24
Constant frequency
active
0 0 0 None
1 0 0 Constant frequency 1
0 1 0 Constant frequency 2
1 1 0 Constant frequency 3
0 0 1 Constant frequency 4
1 0 1 Constant frequency 5
0 1 1 Constant frequency 6
1 1 1 Constant frequency 7