Parameters: Special Functions - Danfoss VLT AutomationDrive FC 300 Design Manual

FC 300 Design Guide
Parameters: Special
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Functions
14-0* Inverter Switching
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14-00 Switching Pattern
Option:
60 AVM
*
SFAVM
Function:
Choose between two different switching
patterns: 60° AVM and SFAVM.
14-01 Switching Frequency
Option:
2.0 kHz
2.5 kHz
3.0 kHz
3.5 kHz
4.0 kHz
*
5.0 kHz
6.0 kHz
7.0 kHz
8.0 kHz
10.0 kHz
12.0 kHz
14.0 kHz
16.0 kHz
Function:
Determines the inverter switching frequency. If
the switching frequency is changed, acoustic noise
from the motor will be minimised.
NB!:
The output frequency value of the
frequency converter can never
be a value higher than 1/10 of
the switching frequency.
When the motor is running, adjust the switching
frequency in par. 4-11 until the motor is as
noiseless as possible. See also par. 14-00
and the section Derating.
NB!:
Switching frequencies higher than 5.0 kHz
lead to automatic derating of the maximum
output of the frequency converter.
14-03 Overmodulation
Option:
Off
*
On
default setting ( )
*
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How to Programme
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display text [ ] value for use in communication via serial communication port
MG.33.B4.02 - VLT is a registered Danfoss trademark
Function:
Allows connection of the overmodulation
function for the output voltage.
Off means no overmodulation of the output
voltage, and means that torque ripple on the
motor shaft is avoided. This feature may be
useful e.g. on grinding machines.
On means you can obtain an output voltage greater
than the mains voltage (up to 15%).
14-04 PWM Random
Option:
*
Off
On
Function:
You can transform the audible switching
motor noise from a clear ring tone into a less
discernable "white" noise, by slightly altering
(at random) the synchronism of the pulse
width modulated output phases.
14-1* Mains On/Off
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Parameters for configuring mains failure
monitoring/handling.
14-10 Mains Failure
Option:
*
No function
Controlled alarm suppression
Function:
Informs the unit of what to do if mains voltage
drops below the limit set in par. 14-11.
Select *No function [0] (default setting) if
the function is not required.
Controlled alarm suppression [5] - suppress the
"undervoltage alarm" and "undervoltage warning"
14-11 Mains Voltage at Mains Fault
Range:
180 - 600 V
Function:
Defines the AC voltage level of the selected
function in par. 14-10.
14-12 Function at Mains Imbalance
Option:
*
Trip
Warning
Disabled
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