Danfoss VLT 6000 HVAC Series User Manual

411 Function at overtemperature
(FUNCT. OVERTEMP)
Value:
Trip (TRIP) [0]
Autoderate & warning
(AUTODERATE & WARNING) [1]
Function:
Select the function which is to be activated when the
frequency converter is exposed to an overtemperature
condition.
Description of choice:
At Trip [0] the frequency converter will stop the motor
and export an alarm.
At Autoderate & warning [1] the frequency converter
will first reduce the switching frequency to minimize
internal losses. If the overtemperature condition per-
sists, the frequency converter will reduce the output
current until the heat sink temperature stabilizes.
When the function is active, a warning will be exported.
412
Trip delay overcurrent, I
LIM
(OVERLOAD DELAY)
Value:
0 - 60 sec. (61=OFF) .
60 sec
Function:
When the frequency converter registers that the output
current has reached the current limit I
LIM
(parameter
215 Current limit) and stays there for the duration se-
lected, a cut-out will be performed.
Description of choice:
Select for how long the frequency converter is to able
to keep up with the output current at the current limit
I
LIM
before it cuts out.
In OFF mode, parameter 412 Trip delay overcurrent ,
I
LIM
is inactive, i.e. cut-outs are not performed.
Feedback signals in open loop
Normally, feedback signals and thus feedback param-
eters are only used in Closed loop operation; in VLT
6000 HVAC units, however, the feedback parameters
are also active in Open loop operation.
In Open loop mode, the feedback parameters can be
used to show a process value in the display. If the
present temperature is to be displayed, the tempera-
ture range can be scaled in parameters 413/414 Min-
imum/ Maximum feedback, and the unit (°C, °F) in
parameter 415 Process units.
413
Minimum feedback , FB
MIN
(MIN. FEEDBACK)
Value:
-999,999.999 - FB
MAX
0.000
Function:
Parameters 413 Minimum feedback, FB
MIN
and 414
Maximum feedback, FB
MAX
are used to scale the dis-
play indication, thereby ensuring that it shows the
feedback signal in a process unit proportionally to the
signal at the input.
Description of choice:
Set the value to be shown on the display at minimum
feedback signal value (par. 309, 312, 315 Min.
scaling) on the selected feedback input (parameters
308/311/314 Analog inputs).
414
Maximum feedback, FB
MAX
(MAX. FEEDBACK)
Value:
FB
MIN
- 999,999.999
100.000
Function:
See the description of par. 413 Minimum feedback,
FB
MIN
.
Description of choice:
Set the value to be shown on the display when maxi-
mum feedback (par. 310, 313, 316 Max. scaling) has
been achieved at the selected feedback input (param-
eters 308/311/314 Analoge inputs).
415 Units relating to closed loop
(REF. / FDBK. UNIT)
Value:
No unit [0]
% [1]
rpm [2]
ppm [3]
pulse/s [4]
l/s [5]
l/min [6]
l/h [7]
kg/s [8]
VLT
®
6000 HVAC Series
= factory setting, () = display text, [] = value for use in communication via serial communication port
144 MG.61.B5.02 - VLT
®
is a registered Danfoss trademark

Danfoss VLT 6000 HVAC Series Specifications

General

Brand	Danfoss
Model	VLT 6000 HVAC Series
Category	DC Drives
Language	English