Danfoss VLT 6000 HVAC Series User Manual

211 Preset reference 1
(PRESET REF. 1)
212 Preset reference 2
(PRESET REF. 2)
213 Preset reference 3
(PRESET REF. 3)
214 Preset reference 4
(PRESET REF. 4)
Value:
-100.00 % - +100.00 %
0.00%
of the reference range/external reference
Function:
Four different preset references can be programmed
in parameters 211-214 Preset reference. The preset
reference is stated as a percentage value of the refer-
ence range (Ref
MIN
- Ref
MAX
) or as a percentage of the
other external references, depending on the choice
made in parameter 210 Reference type.
The choice between the preset references can be
made by activating terminal 16, 17, 29, 32 or 33, cf. the
table below.
Terminal 17/29/33 Terminal 16/29/32
preset ref. msb
preset ref. lsb
0 0 Preset ref. 1
0 1 Preset ref. 2
1 0 Preset ref. 3
1 1 Preset ref. 4
Description of choice:
Set the required preset reference(s) that is/are to be
the options.
215
Current limit, I
LIM
(CURRENT LIMIT)
Value:
0.1 - 1.1 x I
VLT,N
1.1 x I
VLT,N
[A]
Function:
This is where the maximum output current I
LIM
is set.
The factory setting corresponds to the rated output
current. Current limit is for protection of the frequency
converter. If the current limit is set within the range of
1.0-1.1 x I
VLT,N
(the rated output current of the fre-
quency converter), the frequency converter can only
handle a load intermittently, i.e. for short periods at a
time. After the load has been higher than I
VLT,N
, it must
be ensured that for a period the load is lower than
I
VLT,N
. Please note that if the current limit is set to less
than I
VLT,N
, the acceleration torque will be reduced ac-
cordingly.
If the drive is in current limit and a stop command is
initiated with the stop button on the LCP key pad, the
drive output is immediately turned off and the motor
will coast to a stop.
NB!
Current limit should not be used for motor
protection; parameter 117 is for motor pro-
tection.
Description of choice:
Set the required maximum output current I
LIM
.
216 Frequency bypass, bandwidth
(FREQUENCY BYPASS B.W.)
Value:
0 (OFF) - 100 Hz
Disable
Function:
Some systems call for some output frequencies to be
avoided because of mechanical resonance problems.
The frequencies to avoid can be programmed in pa-
rameters 217-220 Frequency bypass .
In this parameter (216 Frequency bypass, bandwidth),
a definition can be given of a bandwidth around each
of these frequencies.
Description of choice:
The bypass bandwidth is equal to the programmed
bandwidth frequency. This bandwidth will be centered
around each bypass frequency.
217 Frequency bypass 1
(BYPASS FREQ. 1)
218 Frequency bypass 2
(BYPASS FREQ. 2)
219 Frequency bypass 3
(BYPASS FREQ. 3)
220 Frequency bypass 4
(BYPASS FREQ. 4)
Value:
0 - 120/1000 HZ
120.0 Hz
The frequency range depends on the selection
made in parameter 200 Output frequency range.
Function:
Some systems call for some output frequencies to be
avoided because of mechanical resonance problems
in the system.
VLT
®
6000 HVAC Series
= factory setting, () = display text, [] = value for use in communication via serial communication port
120 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