ABB ACS560 - Page 220

220 Parameters
22.20 Ext2 speed function Selects a mathematical function between the reference
sources selected by parameters 22.18 Ext2 speed ref1 and
22.19 Ext2 speed ref2. See diagram at 22.18 Ext2 speed
ref1.
Ref1
Ref1 Signal selected by Ext2 speed ref1 is used as speed
reference 1 as such (no function applied).
0
Add (ref1 + ref2) The sum of the reference sources is used as speed reference
1.
1
Sub (ref1 - ref2) The subtraction ([22.11 Ext1 speed ref1] - [22.12 Ext1 speed
ref2]) of the reference sources is used as speed reference 1.
2
Mul (ref1 × ref2) The multiplication of the reference sources is used as speed
reference 1.
3
Min (ref1, ref2) The smaller of the reference sources is used as speed
reference 1.
4
Max (ref1, ref2) The greater of the reference sources is used as speed
reference 1.
5
22.21 Constant speed
function
Determines how constant speeds are selected, and whether
the rotation direction signal is considered or not when
applying a constant speed.
0b0001
0b0000...0b1111 Constant spee d co nfig uration word. 1 = 1
No. Name/Value Description Def/FbEq16
Bit Name Information
0 Constant speed
mode
1 = Packed: 7 constant speeds are selectable using the three sources
defined by parameters 22.22, 22.23 and 22.24.
0 = Separate: Constant speeds 1, 2 and 3 are separately activated by
the sources defined by parameters 22.22, 22.23 and 22.24 respectively.
In case of conflict, the constant speed with the smaller number takes
priority.
1Direction
enable
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 22.26…22.32 are positive.
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).
2…15 Reserved