Danfoss VLT 5000 Series User Manual

Coasting (COASTING) [3]
Kinetic back-up (KINETIC BACKUP) [4]
Controlled alarm suppression
(ctrl alarm supp) [5]
Function:
Using the mains failure function, it is possible to ramp
down the load to 0 Hz if the mains supply to the ad-
justable frequency drive fails.
In parameter 450 Mains voltage during mains fault, the
voltage limit must be set at which the Mains fault func-
tion is to be active.
This function can also be activated by selecting Mains
failure inverted on a digital input.
When Kinetic backup [4] is selected, the ramp function
in parameter 206-212 is deactivated.
Controlled ramp down and kinetic back up have limited
perfomance above 70% load.
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 adjustable frequency drive will start up
again. If Controlled ramp-down and trip [2] is selected,
the motor will ramp via the quick-stop ramp set in pa-
rameter 212.
At 0 Hz the adjustable frequency drive will trip (ALARM
36, mains failure). If the supply voltage is re-establish-
ed during ramp-down, the adjustable frequency drive
will continue the quick-stop ramp and trip. If Coast-
ing [3] is selected, the adjustable frequency drive 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 adjustable
frequency drive will be able to catch the motor and start
up again.
If Kinetic back-up [4] is selected, the adjustable fre-
quency drive will try to utilise the energy from the load
to maintain a constant intermediate circuit voltage. If
the supply voltage is re-established, the adjustable
frequency drive will start up again.
If Controlled alarm suppression [5] is selected, the ad-
justable frequency drive will trip if there is a mains
failure and the unit is not stopped by OFF1, OFF2 or
OFF3 via the Profibus. Only active with Fieldbus profile
(par. 512) selected and Profibus installed.
408 Quick discharge
(QUICK DISCHARGE)
Value:
Not possible (DISABLE) [0]
Possible (ENABLE) [1]
Function:
The option is given of quickly discharging the inter-
mediate circuit capacitors by means of an external
resistor.
Description of choice:
This function is only active in extended units, since it
requires the connection of external 24 V DC and a
brake resistor or discharge resistor; otherwise, the da-
ta selection is limited to Disable [0].
This function can be activated by selecting a digital in-
put signal for Mains failure inverted . Select Disable if
this function is not required. Select Enable and connect
24 V DC external supply and a brake/discharge resis-
tor.
See section Quick discharge.
409 Trip delay torque
(TRIP DELAY TORQ.)
Value:
0 - 60 sec. (OFF)
OFF
Function:
When the adjustable frequency drive 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 adjustable frequency drive is to be
able to run at the torque limit before cutting out. 60 sec.
= OFF means that the time is infinite; however, the
thermal monitoring will still be active.
410 Trip delay-inverter
(INV.FAULT DELAY)
Value:
0 - 35 sec.
Depends on type of unit
VLT
®
5000 Series
= factory setting, () = display text, [] = value for use in communication via serial communication port
128 MG.51.C5.22 - VLT
p
is a registered Danfoss trademark.

Danfoss VLT 5000 Series Specifications

General

Brand	Danfoss
Model	VLT 5000 Series
Category	DC Drives
Language	English