Parameters 361
0000h…FFFFh
Selection of actions to be prevented by user lock.
-
97
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
on page
.
Higher switching frequency results in lower acoustic noise-
Notes
• If you have a multimotor system, contact your local ABB
representative.
• 2 kHz option is not available in R0...R2 frames.
2 kHz
2 kHz
2
4 kHz
4 kHz
4
8 kHz
8 kHz
8
12 kHz
12 kHz
12
Lowest switching frequency that is allowed. Depends on the
frame size.
1.5 kHz
1.5 kHz (available only in R0...R2 frames)
1.5
2 kHz
2 kHz.
2
4 kHz
4 kHz.
4
8 kHz
8 kHz.
8
12 kHz
12 kHz
12
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%).
100%
0…200%
Slip gain.
1 = 1%
Defines the minimum allowed voltage reserve. When the
voltage reserve has decreased to the set value, the drive
enters the field weakening area.
Note:
This is an expert level parameter and should not be
adjusted without appropriate skill.
If the intermediate circuit DC voltage
U
dc
= 550 V and the
voltage reserve is 5%, the RMS value of the maximum output
voltage in steady-state operation is
0.95 × 550 V / sqrt(2) = 369 V
The dynamic performance of the motor control in the field
weakening area can be improved by increasing the voltage
reserve value, but the drive enters the field weakening area
earlier.
-2%
-4…50%
Voltage reserve.
1 = 1%
No.
Name/Value
Description
Def/FbEq16
Summary of Contents for ACS560
Page 1: ...ABB GENERAL PURPOSE DRIVES ACS560 standard control program Firmware manual...
Page 4: ...4...
Page 30: ...30 Start up control with I O and ID run...
Page 32: ...32 Using the control panel...
Page 100: ...100 Program features...
Page 153: ...Control macros 153...
Page 160: ...160...
Page 374: ...374 Parameters...
Page 408: ...408 Additional parameter data...
Page 466: ...466 Fieldbus control through the embedded fieldbus interface EFB...
Page 504: ...504 Control chain diagrams...
Page 508: ...508 Parameterization with drive composer...
Page 512: ...512 Parameterization with automation builder drive manager...