Special functions
400
Brake function
(Brake function)
Value:
Off (off)
[0]
Resistor brake
(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 frequency converter
has an integral brake transistor and brake resistor is
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 with-
out 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 connec-
ted.
Select
AC brake
[4] if short-term generated loads oc-
cur. See parameter 144
Gain AC brake
to set the brake.
Select
Load sharing
[5] if this is used.
NB!
A change of selection will not become ac-
tive until the mains voltage has been dis-
connected 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 re-
set 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
Auto-
matic 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 fault
in connection with the mains failure.
The motor may start without warning.
406
Automatic restart time
(autorestart time)
Value:
0 - 1800 sec.
5 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
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 se-
lected.
= factory setting, () = display text, [] = value for use in communication via serial communication port
MG.27.E2.02 - VLT is a registered Danfoss trademark
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