VLT
®
6000 HVAC Series
Programming
■ Application functions 400-427
In this parameter group,
the special functions
the frequency converter
are set up, e.g. PID
regulation,
setting of the feedback range and the Setup of the
Sleep mode function.
Additionally, this parameter group includes:
- Reset function.
- Flying start.
- Option of interference reductio
nmethod.
- Setup of any function upon loss of load,
e.g.because of a damaged V-belt.
- Setting of switching frequency.
- Selection of process units.
400 Reset function
(RESET FUNCTIO)
Value:
✭Manual reset (MANUAL RESET)
[0]
Automatic reset x 1 (AUTOMATIC X 1)
[1]
Automatic reset x 2 (AUTOMATIC X 2)
[2]
Automatic reset x 3 (AUTOMATIC X 3)
[3]
Automatic reset x 4 (AUTOMATIC X 4)
[4]
Automatic reset x 5 (AUTOMATIC X 5)
[5]
Automatic reset x 10 (AUTOMATIC X 10)
[6]
Automatic reset x 15 (AUTOMATIC X 15)
[7]
Automatic reset x 20 (AUTOMATIC X 20)
[8]
Infinite automatic reset (INFINITE AUTOMATIC)
[9]
Function:
This parameter allows a choice of whether to reset and
restart manually after a trip, or whether the frequency
converter is to be reset and restarted automatically. In
addition, there is a choice of the number of times the
unit is to attempt a restart. The time between each reset
attempt is set in parameter 401, Automatic restart time.
Description of choice:
If Manual reset [0] is selected, resetting must be
effected via the "Reset" key or via a digital input. If the
frequency converter is to carry out an a
utomatic reset
and restart after a trip, select data value [1]-[9].
The motor may start without warning.
401 Automatic restart time
(AUTORESTART TIME)
Value:
0 - 1800 sec.
✭ 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 400 Reset function.
Description of choice:
Set the desired time.
402 Flying start
(FLYING START)
Value:
✭Disable (DISABLE)
[0]
Enable (ENABLE)
[1]
DC brake and start (DC BRAKE AND START)
[3]
Function:
This function makes it possible for the frequency
converter to ‘catch’ a spinning motor, which -
e.g. because of a mains failure - is no longer
controlled by the frequency converter.
This function is activated whenever a start
command is active.
For the frequency converter to be able to catch the
spinning motor, the motor speed must be lower than
the frequency that corresponds to the frequency in
parameter 202 Output frequency high limit, f
MAX
.
Description of choice:
Select Disable [0] if this function is not required.
Select Enable [1] if the frequency converter is to be
able to ‘catch’ and control a spinning motor.
Select DC brake and start [2] if the frequency converter
is to brake the motor by means of the DC brake first,
and then start. It is assumed that parameters 114-116
DC braking are enabled. In the case of a substantial
‘windmilling’ effect (spinning motor), the frequency
converter is not able to ‘catch’ a spinning motor
unless DC brake and start has been selectd.
When parameter 402, Flying Start, is
enabled, motor may turn in forward and
backward directions a few revolutions
even with no speed reference applied.
✭ = factory setting. () = display text [] = value for use in communication via serial communication port
MG.61.A5.02 - VLT is a registered Danfoss trademark
115
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