ABB ACQ580 Firmware Manual page 173

No. Name/Value
Control panel (ref
copied)
Level control
Other
28.21 Constant frequency
function
Bit Name
0 Const freq
mode
1 Direction
enable
2...15 Reserved
0000b...0011b
Description
Panel reference (03.01 Panel
the previous control location is used as the reference when
the control location changes if the references for the two
locations are of the same type (eg
frequency/speed/torque/PID); otherwise, the actual signal is
used as the new reference.
Reference
Ext1 -> Ext2
Parameter 76.07 LC speed ref
function).
Source selection (see Terms and abbreviations
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.
reference, see page 106) for
Ext1 reference
Ext2 reference
Active reference
Inactive reference
t
(output of the Level control
on page 100). -
28.23 and 28.24.
28.23
22.26...22.32 are positive.
Parameters 169
Def/FbEq16
19
30
0001b
and 28.24
1 = 1