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

FC 300 Design Guide
Parameters: Special
"
Functions
14-0* Inverter Switching
"
14-00 Switching Pattern
Option:
60 AVM
*
SFAVM
Function:
Choose between two different switching
patterns: 60° AVM and SFAVM.
14-01 Switching Frequency
Option:
*
5.0 kHz
Function:
Determines the inverter switching frequency. If
you change the switching frequency, acoustic
noise from the motor is minimized.
NOTE
The output frequency value of the
adjustable frequency drive 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.
NOTE
Switching frequencies higher than
5.0 kHz lead to automatic derating
of the maximum output of the
adjustable frequency drive.
14-03 Overmodulation
Option:
*
Off
On
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
crankshaft is avoided. This feature may be
useful e.g. on grinding machines.
* default setting ( )
How to Program
[0]
[1]
[5]
[0]
[1]
display text [ ] value for use in communication via serial communication port
MG.33.B3.22 - VLT is a registered Danfoss trademark
On will allow an output voltage greater than
the mains voltage (up to 15%).
14-04 PWM Random
Option:
*
Off
On
Function:
Transform the audible switching motor noise from a
clear ring tone into a less discernable "white" noise
by slightly altering (at random) the synchronization
of the pulse width modulated output phases.
14-1* Mains On/Off
"
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
Function:
Select to trip the drive or issue a warning if the
drive detects a severe mains imbalance. Operation
under severe mains imbalance conditions reduces
the life of the unit. It is severe if the drive is
operated continuously near nominal load (i.e.
running a pump or fan near full speed).
[0]
[1]
[0]
[5]
*
342V
[0]
[1]
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