Decentral Solutions
Programming, FCD
300
■
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 variable frequency
drive 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 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.
NOTE
A change of selection will not become
active until the AC line 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 variable frequency drive 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 variable 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 variable
frequency drive will carry out a reset if there has been
a fault in connection with the AC line failure.
The motor may start without warning.
406 Automatic restart time
(AUTORESTART TIME)
Value:
0 - 10 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 variable frequency drive 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 variable frequency drive should
maintain the output current at the current limit
✭
= factory setting. () = display text [] = value for use in communication via serial communication port
MG.90.F2.22 - VLT is a registered Danfoss trademark
137
