ABB ACS180 - Page 193

Parameters 193
28.51 Critical frequency
function
Enables/disables the critical frequencies function. Also
determines whether the specified ranges are effective in
both rotating directions or not.
See also section Critical speeds/frequencies on page 53.
0000h
0000h…FFFFh Critical frequencies configuration word. 1 = 1
28.52 Critical frequency 1
low
Defines the low limit for critical frequency 1.
Note: This value must be less than or equal to the value
of 28.53 Critical frequency 1 high.
0.00 Hz
-500.00…500.00 Hz Low limit for critical frequency 1. See par.
46.02
28.53 Critical frequency 1
high
Defines the high limit for critical frequency 1.
Note: This value must be greater than or equal to the
value of 28.52 Critical frequency 1 low.
0.00 Hz
-500.00…500.00 Hz High limit for critical frequency 1. See par.
46.02
28.54 Critical frequency 2
low
Defines the low limit for critical frequency 2.
Note: This value must be less than or equal to the value
of 28.55 Critical frequency 2 high.
0.00 Hz
-500.00…500.00 Hz Low limit for critical frequency 2. See par.
46.02
28.55 Critical frequency 2
high
Defines the high limit for critical frequency 2.
Note: This value must be greater than or equal to the
value of 28.54 Critical frequency 2 low.
0.00 Hz
-500.00…500.00 Hz High limit for critical frequency 2. See par.
46.02
28.56 Critical frequency 3
low
Defines the low limit for critical frequency 3.
Note: This value must be less than or equal to the value
of 28.57 Critical frequency 3 high.
0.00 Hz
-500.00…500.00 Hz Low limit for critical frequency 3. See par.
46.02
28.57 Critical frequency 3
high
Defines the high limit for critical frequency 3.
Note: This value must be greater than or equal to the
value of 28.56 Critical frequency 3 low.
0.00 Hz
-500.00…500.00 Hz High limit for critical frequency 3. See par.
46.02
No. Name/Value Description Default
FbEq 16
Bit Name Information
0 Crit freq 1 = Enable: Critical frequencies enabled.
0 = Disable: Critical frequencies disabled.
1 Sign mode 1 = According to par: The signs of parameters 28.52…28.57 are taken
into account.
0 = Absolute: Parameters 28.52…28.57 are handled as absolute values.
Each range is effective in both directions of rotation.
ACS180 FW.book Page 193 Tuesday, March 9, 2021 2:25 PM