Danfoss VLT FCD 303 Design Guide

VLT
®
FCD Series
400
400 Brake function
(BRAKE FUNCTION)
Value:
✭Off (OFF)
[0]
Resistor brake
(RESISTOR)
[1]
AC brake (AC BRAKE)
[4]
Function:
Resistor brake [1] is selected if the frequency con-
verter has an integral brake transistor and brake
resistor is connected to terminals 81, 82. A higher
intermediate circuit voltage is permitted during brak-
ing (generated operation) when a brake resistor is
connected.
AC brake [4] can be selected to improve braking
without using brake resistors. Please note that AC
brake [4] is not as effective as Resistor brake [1].
Description of choice:
Select Resistor brake [1] if a brake resistor is con-
nected.
Select AC brake [4] if short-term generated loads oc-
cur. See parameter 144 Gain AC brake to set the
brake.
NB!:
A change of selection will not become active
until the mains voltage has been discon-
nected and reconnected.
405
405 Reset function
(RESET MODE)
Value:
✭Manual reset (MANUAL RESET)
[0]
Automatic reset x 1
(AUTOMA TIC X 1)
[1]
Automatic reset x 3
(AUTOMA TIC X 3)
[3]
Automatic reset x 10
(AUTOMA TIC X 10)
[10]
Reset at power-up
(RESET AT POWER UP)
[11]
Function:
This parameter makes it possible to select whether
reset and restart after a trip are to be manual or
whether the frequency converter is to be reset and
restarted automatically. Furthermore, it is possible to
select the number of times a restart is to be at-
tempted. The time between each attempt is set in
parameter 406 Automatic restart time.
Description of choice:
If Manual reset [0] is selected, reset is to be carried
out via the [STOP/RESET] key, a digital input or se-
rial communication. If the frequency converter is to
carry out an automatic reset and restart after a trip,
select data value [1], [3] or [10].
If Reset at power-up [11] is selected, the frequency
converter will carry out a reset if there has been a
fault in connection with the mains failure
The motor may start without warning.
406
406 Automatic restart time
(AUTORESTART TIME)
Value:
0 - 10 sec.
✭ 5 sec.
Function:
This parameter allows setting of the time from trip-
ping until the automatic reset function begins. It is
assumed that automatic reset has been selected in
parameter 405 Reset function.
Description of choice:
Set the required time.
409
409 Trip delay overcurrent, I
LIM
(TRIP DELAY CUR.)
Value:
0 - 60 sec. (61=OFF)
✭ OFF
Function:
When the frequency converter registers that the out-
put current has reached the current limit
I
LIM
(parameter 221 Current limit) and remains there
for the preset time, it is disconnected. Can be used
to protect the application, like the ETR will protect
the motor if selected.
Description of choice:
Select how long the frequency converter should
maintain the output current at the current limit I
LIM
before it disconnects. At OFF parameter 409 Trip
delay overcurrent, I
LIM
is not working, i.e. disconnec-
tion will not take place.
411
411 Switching frequency
(SWITCH FREQ.)
Value:
3000 - 14000 Hz
✭ 4500 Hz
Function:
The set value determines the switching frequency of
the inverter. If the switching frequency is changed,
✭
= factory setting. () = display text [] = value for use in communication via serial communication port
MG.04.A1.02 - VLT is a registered Danfoss trade mark
83
Programming

Danfoss VLT FCD 303 Specifications

General

Brand	Danfoss
Model	VLT FCD 303
Category	DC Drives
Language	English