Special Functions - Danfoss VLT FCD 303 Operating Instructions Manual

Special functions

400 Brake function
(BRAKE FUNCTION)
Value:
Off (OFF)
Resistor brake
(RESISTOR)
AC brake (AC BRAKE)
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
without using brake resistors. Please note that AC
brake [4] is not as effecti v e 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
acti v e until the mains voltage has been
disconnected and reconnected.
405 Reset function
(RESET MODE)
Value:
Manual reset (MANUAL RESET)
Automatic reset x 1
(AUTOMATIC X 1)
Automatic reset x 3
(AUTOMATIC X 3)
Automatic reset x 10
(AUTOMATIC X 10)
Reset at power-up
(RESET AT POWER UP)
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.
= factory setting. () = display text [] = value for use in communication via serial communication port
66
VLT
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].
[0]
If Reset at power-up [11] is selected, the frequency
converter will carry out a reset if there has been a
[1]
fault in connection with the mains failure.
[4]
The motor may start without warning.
406 Automatic restart time
(AUTORESTART TIME)
Value:
0 - 10 sec.
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 Reset function.
Description of choice:
Set the required time.
409 Trip delay overcurrent, I
(TRIP DELAY CUR.)
Value:
0 - 60 sec. (61=OFF)
[0]
Function:
[1]
When the frequency converter registers that the
output current has reached the current limit I
[3]
(parameter 221 Current limit) and remains there
for the preset time, it is disconnected. Can be
[10]
used to protect the application, like the ETR
will protect the motor if selected.
[11]
Description of choice:
Select how long the frequency converter should
maintain the output current at the current limit
I before it disconnects. At OFF parameter 409
LIM
Trip delay overcurrent, I
disconnection will not take place.
MG.04.B7.02 - VLT is a registered Danfoss trademark
®
FCD Series
5 sec.
LIM
LIM
is not working, i.e.
LIM
OFF