ABB +N5600 Firmware Instructions page 434

434 Parameters
No. Name/Value
ESP CW bit 8
Other
79.41 Overload limit type
Fixed limit
Linear
Quadratic
User curve
79.42 Overload
supervision signal
NULL
AI1 scaled
AI2 scaled
FBA1 ref
FBA2 ref
EFB1 ref
EFB2 ref
Estimated motor
current
Motor current %
Other
79.43 Overload limit
0.00...30000.00
79.47 Overload delay type
Constant
Description
Parameter 74.01 ESP control
enable/disable status of the function.
Source selection (see Terms and abbreviations
Selects the type of limit used for overload supervision.
The user has option to choose either a fixed limit, a curve of a
predefined shape or plot a custom curve as a function of
motor speed.
Fixed limit is a constant value for all speeds.
Overload limit is calculated by formula:
I = I * (F / F )
lim set act max
Where,
I = 79.90 Overload actual limit
lim
I = 79.43 Overload limit
set
F = 79.09 Load limit speed scale
max
F = Actual speed
act
Overload limit is calculated by formula:
2
I = I * (F / F )
lim set act max
Where,
I = 79.90 Overload actual limit
lim
I = 79.43 Overload limit
set
F = 79.09 Load limit speed scale
max
F = Actual speed
act
Overload limit depends on the user input load curve, actual
speed/frequency and Overload supervision input.
Defines the source for the supervision signal used in the
overload protection.
Zero
12.12 AI1 scaled value
12.22 AI2 scaled value
03.05 FB A reference 1
03.06 FB A reference 2
03.09 EFB reference 1 (see page 156).
03.10 EFB reference 2 (see page 156).
Parameter 09.13 Motor current estimated
Estimated motor current in % of nominal motor current.
Source selection (see Terms and abbreviations
Defines overload limit value.
Note: This parameter is not applicable in case User curve is
selected for the overload curve shape in parameter
Overload limit type.
Overload fixed limit.
Selects the type of overload delay time setting.
The user has option to choose between fixed and floating
delay calculation methods.
Overload limit depends on the user input load curve, actual
speed/frequency and Overloadload supervision input.
word, bit-8 status controls
(see page 197).
(see page 199).
(see page 156).
(see page 156).
(see page 183).
Def/FbEq16
10
on page 148). -
Fixed limit
Motor current
%
0
1
2
3
4
5
6
7
8
on page 148). -
100.00
79.41
10 = 1
Constant