Motor Control - ABB ACS580 Firmware Manual

312 Parameters
No. Name/Value
96.16 Unit selection
Bit Name
0 Power unit
1 Reserved
2 Temperature
unit
3 Reserved
4 Torque unit
5...15 Reserved
0000h...FFFFh
96.51 Clear fault and
event logger
0...1
97

97 Motor control

97.01 Switching
frequency reference
4 kHz
8 kHz
12 kHz
97.02 Minimum switching
frequency
1.5 kHz
2 kHz
4 kHz
8 kHz
12 kHz
97.03 Slip gain
0...200%
Description
Selects the unit of parameters indicating power, temperature
and torque.
Information
0 = kW
1 = hp
0 = °C
1 = °F
0 = Nm (N·m)
1 = lbft (lb·ft)
Unit selection word.
Clears all events from the drive's fault and event logs.
0 = No effect; 1 = Clears the logger.
Switching frequency; slip gain; voltage reserve; flux braking;
anti-cogging (signal injection); IR compensation.
Defines the switching frequency of the drive that is used as
long as the drive does not heat too much. See section
Switching frequency on page 108.
Higher switching frequency results in lower acoustic noise.
In multimotor systems, do not change the switching frequency
from the default value.
4 kHz.
8 kHz.
12 kHz.
Lowest switching frequency that is allowed. Depends on the
frame size.
1.5 kHz.
2 kHz.
4 kHz.
8 kHz.
12 kHz.
Defines the slip gain which is used to improve the estimated
motor slip. 100% means full slip gain; 0% means no slip gain.
The default value is 100%. Other values can be used if a
static speed error is detected despite having the setting at full
slip gain.
Example (with nominal load and nominal slip of 40 rpm): A
1000 rpm constant speed reference is given to the drive.
Despite having full slip gain (= 100%), a manual tachometer
measurement from the motor axis gives a speed value of 998
rpm. The static speed error is 1000 rpm - 998 rpm = 2 rpm. To
compensate the error, the slip gain should be increased to
105% (2 rpm / 40 rpm = 5%).
Slip gain.
Def/FbEq16
0000b
1 = 1
0
1 = 1
4 kHz
4
8
12
2 kHz
1.5
2
4
8
12
100%
1 = 1%