Danfoss VT2800 Series User Manual

VLT
®
2800 Series
Programming
■ Special functions
400 Brake function
(BRAKE FUNCTION)
Value:
Off (OFF)
[0]
Resistor brak e
(RESISTOR)
[1]
AC brake ( AC BRAKE)
[4]
Load sharing (LOAD SHARING)
[5]
Factory setting depends on unit type.
Function:
Resistor brake [1] is selected if the freque ncy converter
has an integral brake transistor and brake re sistor is
connected to terminals 81, 82. A higher i ntermediate
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 a s 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.
Select Load sharing [5]ifthisisused.
NB!:
A change of selection will not become
active until the mains voltage has been
disconnected and reconnected.
405 Reset function
(RESET MODE)
Value:
✭M anual reset (MANUA L 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 ha s 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 h a s been selected
in parameter 405 Reset function.
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 conve rter 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. () = di splay text [] = value for use in communication via serial communicat ion port
MG.28.E9.02 - VLT is a registered Danfoss trademark
97

Danfoss VT2800 Series Specifications

General

Brand	Danfoss
Model	VT2800 Series
Category	Controller
Language	English