ABB ACQ580, Firmware Manual

Page: 177 / 422

Parameters 173
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
28.72 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 . After this frequency has
been reached, the acceleration continues with the same rate
to the value defined by 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.
5.0 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.
5.0 s
0.000…1800.000 s Deceleration time 1. 10 = 1 s
28.76 Freq ramp in zero
source Selects a source that forces the frequency reference to zero.
0 = Force frequency reference to zero
1 = Normal operation Inactive
Active 0. 0
Inactive 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
Other [bit] Source selection (see Terms and abbreviations on page 100 ). -
28.82 Shape time 1 Defines the shape of acceleration ramp at the beginning of
acceleration. 0.000
0.000...1800.000 s Shape time 1. 10 = 1 s
28.92 Frequency ref act 3 Displays the frequency reference after selection ( 19.11
Ext1/Ext2 selection ). See the control chain diagram on page
404 .
This parameter is read-only.
-
-500.00
…500.00 Hz Frequency reference after selection. See par.
46.02
No. Name/Value Description Def/FbEq16