ABB ACQ580 Firmware Manual page 176

172 Parameters
No. Name/Value
28.41 Frequency ref safe
-500.00...500.00
Hz
28.51 Critical frequency
function
Bit Name
0 Crit freq
1 Sign mode
0000b...0011b
28.52 Critical frequency 1
low
-500.00...500.00
Hz
28.53 Critical frequency 1
high
-500.00...500.00
Hz
28.54 Critical frequency 2
low
-500.00...500.00
Hz
28.55 Critical frequency 2
high
-500.00...500.00
Hz
28.56 Critical frequency 3
low
-500.00...500.00
Hz
Description
Defines a safe frequency reference value that is used with
supervision functions such as
• 12.03 AI supervision function
• 49.05 Communication loss action
• 50.02 FBA A comm loss func.
• 80.17 Maximum flow protection
• 80.18 Minimum flow protection
Safe frequency reference.
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
Information
1 = Enable: Critical frequencies enabled.
0 = Disable: Critical frequencies disabled.
1 = According to par: The signs of parameters
into account.
0 = Absolute: Parameters
Each range is effective in both directions of rotation.
Critical frequencies configuration word.
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.
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.
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.
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
High limit for critical frequency 2.
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
Low limit for critical frequency 3.
(page 51).
28.52...28.57 are handled as absolute values.
high.
low.
high.
low.
high.
Def/FbEq16
0.00 Hz
See par.
46.02
0000b
28.52...28.57 are taken
1 = 1
0.00 Hz
See par.
46.02
0.00 Hz
See par.
46.02
0.00 Hz
See par.
46.02
0.00 Hz
See par.
46.02
0.00 Hz
See par.
46.02