ABB ACS880 Series, Firmware Manual

Page: 542 / 764

Def / Type
FbEq 16b / 32b Description Name / Range /
Selection No.
2 Underload limit is calculated by using the formula:
I
lim
= I
set
* (F
act
/ F
max
)
2
Where,
I
lim
= 79.90 Overload actual limit
I
set
= 79.43 Overload limit
F
max
= 79.09 Load limit speed scale
F
act
= Actual speed
Quadratic
3 Overload limit depends on the user input load curve,
actual speed/frequency and Overload supervision input. User curve
Motor current % /
unit32 Defines the source for the supervision signal used in
the overload protection. Overload
supervision signal 79.42
0 Zero NULL
1 12.12 AI1 scaled value (page 226) . AI1 scaled
2 12.22 AI2 scaled value (page 228) . AI2 scaled
4 3.5 FB A reference 1 (page 179) . FB A ref1
5 3.6 FB A reference 2 (page 179) . FB A ref2
8 3.9 EFB reference 1 (page 179) . EFB ref1
9 3.10 EFB reference 2 (page 179) . EFB ref2
7 Parameter 9.13 Motor current estimated . Estimated motor
current
8 Estimated motor current in % of nominal motor current. Motor current %
See Terms and abbreviations (page 169) . Other [value]
100.00 / real32 Defines overload limit value.
Note: This parameter is not applicable in case User
curve is selected for the overload curve shape in
parameter
79.41 Overload limit type .
Overload limit 79.43
10 = 1 / 100 = 1 Overload fixed limit. 0.00 ... 30000.00
Constant / unit32 Selects the type of overload delay time setting.
The user has option to choose between fixed and
floating delay calculation methods. Overload delay type 79.47
0 Overload limit depends on the user input load curve,
actual speed/frequency and Overloadload supervision
input. Constant
1 T
act
= T
set
* (I
lim
/ I
act
)
Where,
T
act
= 79.91 Overload trip count down
T
set
= 79.48 Overload delay time
I
lim
= 79.90 Overload actual limit
I
act
= 79.42 Overload supervision signal
Linear
2 T
act
= T
set
* (I
lim
/ I
act
)
2
Where,
T
act
= 79.91 Overload trip count down
T
set
= 79.48 Overload delay time
I
lim
= 79.90 Overload actual limit
I
act
= 79.42 Overload supervision signal
Quadratic
542 Parameters