Automatic Restart Time; Trip Delay Torque; Mains Failure, Par 407 - Flux - Danfoss VLT 5000 FLUX Operating Instructions Manual

Description of choice:
If Manual reset [0] is selected, reset must be effected
via the [RESET] key or via the digital inputs.
If the frequency converter is to carry out an
automatic reset (1-10 times) after tripping,
select data value [1]-[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.
NB!:
The internal AUTOMATIC RESET counter is
reset 10 minutes after the first AUTOMATIC
RESET has occurred.
Warning: The motor may start
without warning.

406 Automatic restart time

(AUT RESTART TIME)
Value:
0 - 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 405.
Description of choice:
Set the desired time.
407 Mains failure
(MAINS FAILURE)
Value:
No function (NO FUNCTION)
Controlled ramp-down
(CONTROL RAMP DOWN)
Controlled ramp-down and trip
(CTRL. RAMP DOWN-TRIP)
Coasting (COASTING)
Kinetic back-up (KINETIC BACKUP)
Kinetic back-up and trip (KINETIC BACKUP-TRIP) [5]
Function:
Using the mains failure function, it is possible to
ramp down the load to 0 speed if the mains supply
to the frequency converter fails.
In parameter 450 Mains voltage during mains
fault, the voltage limit must be set at which the
Mains fault function is to be active.
= factory setting. () = display text [] = value for use in communication via serial communication port
MG.55.A6.02 - VLT is a registered Danfoss trademark
This function can also be activated by selecting
Mains failure inverted on a digital input.
When Kinetic back-up [4] and Kinetic back-up
and trip [5] is selected, the ramp function in
parameter 206-212 is deactivated.
Description of choice:
Select No function [0] if this function is not required. If
Controlled ramp-down [1] is selected, the motor will
ramp via the quick-stop ramp set in parameter 212. If
the supply voltage is re-established during ramp-down,
the frequency converter will start up again. If Controlled
ramp-down and trip [2] is selected, the motor will ramp
via the quick-stop ramp set in parameter 212.
At 0 speed the frequency converter will trip (ALARM
36, mains failure). If the supply voltage is re-established
during ramp-down, the frequency converter will
continue the quick-stop ramp and trip. If Coasting [3]
is selected, the frequency converter will turn off the
inverters and the motor will start coasting.
Parameter 445 Flying motor must be active,
so that if the supply voltage is re-established,
the frequency converter will be able to catch
5 sec. the motor and start up again.
If Kinetic back-up [4] is selected, the frequency
converter will try to utilise the energy from the
load to maintain a constant intermediate circuit
voltage. If the supply voltage is re-established, the
frequency converter will start up again.
If kinetic back-up and trip [5] is selected, the frequency
converter will utilise the energy from the load to maintain
a constant intermediate circuit voltage. Selecting
kinetic back-up and trip ensures also kinetic back-up
even if the start signal is removed. If the supply
voltage is re-established, the frequency converter
will run a normal stop and trip at 0 RPM.
[0]

409 Trip delay torque

(TRIP DELAY TORQ.)
[1]
Value:
0 - 60 sec. (OFF)
[2]
[3]
Function:
[4]
When the frequency converter registers that the
output torque has increased up to the torque limits
(parameters 221 and 222) in the set time, cutting out
is effected when that time has passed.
Description of choice:
Select how long the frequency converter is to be
able to run at the torque limit before cutting out. 60
®
VLT 5000 FLUX
OFF
105