ABB ACS880-104

Parameters 291
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
28.71 Freq ramp set
selection
Selects a source that switches between the two sets of
acceleration/deceleration times defined by parameters
28.72…28.75.
0 = Acceleration time 1 and deceleration time 1 are in force
1 = Acceleration time 2 and deceleration time 2 are in force
Acc/Dec time
1
Acc/Dec time 1 0. 0
Acc/Dec time 2 1. 1
DI1 Digital input DI1 (10.02 DI delayed status, bit 0). 2
DI2 Digital input DI2 (10.02 DI delayed status, bit 1). 3
DI3 Digital input DI3 (10.02 DI delayed status, bit 2). 4
DI4 Digital input DI4 (10.02 DI delayed status, bit 3). 5
DI5 Digital input DI5 (10.02 DI delayed status, bit 4). 6
DI6 Digital input DI6 (10.02 DI delayed status, bit 5). 7
DIO1 Digital input/output DIO1 (11.02 DIO delayed status, bit 0). 10
DIO2 Digital input/output DIO2 (11.02 DIO delayed status, bit 1). 11
Other [bit] Source selection (see Terms and abbreviations on page 148). -
28.72 Freq acceleration
time 1
Defines acceleration time 1 as the time required for the
frequency to change from zero to the frequency defined by
parameter 46.02 Frequency scaling (not to parameter 30.14
Maximum frequency).
If the reference increases faster than the set acceleration
rate, the motor will follow the acceleration rate.
If the reference increases slower than the set acceleration
rate, the motor frequency will follow the reference.
If the acceleration time is set too short, the drive will
automatically prolong the acceleration in order not to exceed
the drive torque limits.
20.000 s
0.000 … 1800.000
s
Acceleration time 1. 10 = 1 s
28.73 Freq deceleration
time 1
Defines deceleration time 1 as the time required for the
frequency to change from the frequency defined by
parameter 46.02 Frequency scaling (not from parameter
30.14 Maximum frequency) to zero.
If there is any doubt about the deceleration time being too
short, ensure that DC overvoltage control (30.30 Overvoltage
control) is on.
Note: If a short deceleration time is needed for a high inertia
application, the drive should be equipped with braking
equipment such as a brake chopper and brake resistor.
20.000 s
0.000 … 1800.000
s
Deceleration time 1. 10 = 1 s
No. Name/Value Description Def/FbEq16