ABB ACS880 Firmware Manual page 352

352 Parameters
No. Name / Range /
Selection
28.41 Frequency ref safe
-598.00 ... 598.00 Hz
28.51 Critical frequency
function
b0 Enable
b1 Sign mode
b2...15 Reserved
0000h...FFFFh
28.52 Critical frequency 1
low
-598.00 ... 598.00 Hz
28.53 Critical frequency 1
high
-598.00 ... 598.00 Hz
28.54 Critical frequency 2
low
-598.00 ... 598.00 Hz
28.55 Critical frequency 2
high
Description
Defines a safe frequency reference value that is used
with supervision functions such as
• 12.3 AI supervision function
• 49.5 Communication loss action
• 50.2 FBA A comm loss func
• 50.32 FBA B comm loss func
• 58.14 Communication loss
Safe frequency reference. For scaling, see parameter
46.2.
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 (page
1 = Enable: Critical frequencies enabled.
0 = Disable: Critical frequencies disabled.
1 = According to par: The signs of parameters
28.52...28.57 are taken into account.
0 = Absolute: Parameters
absolute values.
Each range is effective in both directions of rotation.
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
Low limit for critical frequency 1. For scaling, see
parameter 46.2.
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
High limit for critical frequency 1. For scaling, see
parameter 46.2.
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
Low limit for critical frequency 2. For scaling, see
parameter 46.2.
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
action.
28.52...28.57 are handled as
high.
low.
high.
low.
Def / Type
FbEq 16b / 32b
- / real32
- / -
- / uint16
85).
1 = 1
0.00 Hz / real32
- / -
0.00 Hz / real32
- / -
0.00 Hz / real32
- / -
0.00 Hz / real32