ABB ACS880-01 Series, Инструкции к прошивке

Страница: 288 / 664

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.
1 Direction
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