Danfoss FCM 300 Series Design Manual page 58

400 Brake functions (BRAKE FUNCTIONS)
Settings:
OFF (OFF)
AC brake (AC BRAKE)
Function:
AC brake [4] can be selected to improve braking.
Description of choice:
Select AC brake [4] if short-term generated loads
occur.
405 Reset function (RESET MODE)
Settings:
Manual reset (MANUAL RESET)
Automatic reset x 1 (AUTOMATIC X 1)
Automatic reset x 2 (AUTOMATIC X 2)
Automatic reset x 3 (AUTOMATIC X 3)
Automatic reset x 4 (AUTOMATIC X 4)
Automatic reset x 5 (AUTOMATIC X 5)
Automatic reset x 6 (AUTOMATIC X 6)
Automatic reset x 7 (AUTOMATIC X 7)
Automatic reset x 8 (AUTOMATIC X 8)
Automatic reset x 9 (AUTOMATIC X 9)
Automatic reset x 10 (AUTOMATIC X 10)
Reset at power-up (RESET AT POWER UP)
Function:
This parameter makes it possible to select the reset
function desired after tripping.
After reset, the FC motor can be restarted after 1.5
sec.
Description of choice:
If Manual reset [0] is selected, reset must be effected
via the digital inputs.
If the FC motor is to carry out an automatic reset
(max. 1-10 times within 10 minutes) after tripping,
select data value [1]-[10].
Warning: The motor may start without
warning up to 10 x 5 sec. after trip.
= factory setting. ( ) = parameter window text. [ ] = value for use in communication via serial communication port
58
FCM 300 Series
411 Switching frequency (SWITCH FREQ.)
Settings:
1.5 -14.0 kHz
[0]
[4]
Unit dependent
Function:
The setting determines the switching frequency of
the inverter. If the switching frequency is changed,
this may help to minimise possible acoustic noise
from the motor.
Description of choice:
When the motor is running, the switching frequency
is adjusted in parameter 411 until the frequency has
been obtained at which the motor is as low-noise as
possible.
[0]
See also parameter 446 - switching pattern. See
[1]
derating in chapter 10.
[2]
NB!
[3]
Switching frequencies higher than 4 kHz may
[4]
cause thermal trip depending on ambient
[5]
temperature.
[6]
[7]
[8]
412 Variable switching frequency
[9]
(VAR CARRIER FREQ)
[10]
Settings:
[11]
Not possible (DISABLE)
Variable switching freq. (VAR. CARRIER FREQ.) [1]
Temperature dep. sw. freq. (TEMP . DEP. FREQ.) [2]
Function:
This function makes it possible to change the
switching frequency depending on the load.
However, the maximum switching frequency is
determined by the value set in parameter 411.
Description of choice:
Select Not possible [0] if a permanent switching
frequency is desired. Set the switching frequency in
parameter 411.
If Variable switching frequency [1] is selected the
switching frequency will decline at an increasing
output frequency. This is used in applications with
square torque characteristics (centrifugal pumps and
fans) in which the load declines depending on the
output frequency.
MG.03.B6.02 - VLT is a registered Danfoss trademark
[1500 - 14000]
[0]