Danfoss VLT FCD 311 User Manual

VLT
®
FCD Series
■ Special functions
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
converter has a brake resistor connected to terminals
81, 82. A higher intermediate circuit voltage is
permitted during braking (generated operation)
when a brake resistor is connected.
AC brake [4] can be selected to improve braking
withoutusingbrakeresistors. PleasenotethatAC
brake [4] is not as effective as Resistor brake [1].
Description of choice:
Select Resistor brake [1] if a brake resistor is connected.
Select AC brake [4] if short-term generated loads occur.
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
disconnected and reconnected.
405 Reset function
(RESET MODE)
Value:
✭Manual reset (MANUAL RESET)
[0]
Automatic reset x 1
(AUTOMATIC X 1)
[1]
Automatic reset x 3
(AUTOMATIC X 3)
[3]
Automatic reset x 10
(AUTOMATIC 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
attempted. 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
serial 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
faultinconnectionwiththemainsfailure.
The motor may start without warning.
406 Automatic restart time
(AUTORESTART TIME)
Value:
0-10sec.
✭ 5sec.
Function:
This parameter allows setting of the time from
tripping until the automatic reset function begins. It
is assumed that automatic reset has been selected
in parameter 405 Re set funct ion.
Description of choice:
Set the required time.
409 Trip delay overcurrent, I
LIM
(TRIP DELAY CUR.)
Value:
0 - 60 sec. (61=OFF)
✭ OFF
Function:
When the frequency converter registers that the
output 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.
disconnection will not take place.
✭ = factory setting. () = display text [] = value for use in communication via serial communication port
MG.04.B7.02 - VLT is a registered Danfoss trademark
66

Danfoss VLT FCD 311 Specifications

General

Brand	Danfoss
Model	VLT FCD 311
Category	DC Drives
Language	English