ABB ACS560 Firmware Manual page 244

244 Parameters
No. Name/Value
Mul (ref1 × ref2)
Min (ref1, ref2)
Max (ref1, ref2)
28.21 Constant frequency
function
Bit Name
0 Const freq
mode
1 Direction
enable
2 Frequency step Frequency step: 1 = Freq step enable; 0 = Freq step disable
3...15 Reserved
0b000...0b1111
Description
The multiplication of the reference sources is used as
frequency reference 1.
The smaller of the reference sources is used as frequency
reference 1.
The greater of the reference sources is used as frequency
reference 1.
Determines how constant frequencies are selected, and
whether the rotation direction signal is considered or not
when applying a constant frequency.
Information
1 = Packed: 7 constant frequencies are selectable using the three
sources defined by parameters 28.22,
0 = Separate: Constant frequencies 1, 2 and 3 are separately activated
by the sources defined by parameters 28.22,
respectively. In case of conflict, the constant frequency with the smaller
number takes priority.
1 = Start dir: To determine running direction for a constant speed, the
sign of the constant speed setting (parameters 22.26...22.32) is
multiplied by the direction signal (forward: +1, reverse: -1). This
effectively allows the drive to have 14 (7 forward, 7 reverse) constant
speeds if all values in
WARNING: If the direction signal is reverse and the active
constant speed is negative, the drive will run in the forward
direction.
0 = Accord Par: The running direction for the constant speed is
determined by the sign of the constant speed setting (parameters
22.26...22.32).
Constant frequency configuration word.
28.23 and 28.24.
28.23
22.26...22.32 are positive.
Def/FbEq16
3
4
5
0b0001
and 28.24
1 = 1