Trane VarioTrane TR1 2800 Series, Operating Instructions Manual

Page: 48 / 137

400 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 adjustable frequen-
cy drive has an integral brake transistor and brake
resistor is connected to terminals 81, 82. A higher in-
termediate circuit voltage is permitted during braking
(generated operation) when a brake resistor is con-
nected.
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.
NOTE:
A change of selection will not become active until the
mains voltage has been disconnected and reconnec-
ted.
405 Reset function
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 adjustable frequency drive is to be reset
and restarted automatically. Furthermore, it is possi-
ble 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 adjustable frequency drive 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 adjustable
frequency drive will carry out a reset if there has been
a fault in connection with the mains failure.
406 Automatic restart 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
Trip delay overcurrent, ILIM
Value:
0 - 60 sec. (61=OFF)
OFF
Function:
When the adjustable frequency drive registers that
the output current has reached the current limit
ILIM (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 adjustable frequency drive
should maintain the output current at the current limit
ILIM before it disconnects. At OFF parameter 409
Trip
delay overcurrent, I LIM is not working, i.e. disconnec-
tion will not take place.
TR1 2800 Series VFD 47
Special Functions
CAUTION
The motor may start without warning.
Programming