VLT
®
6000 HVAC
93MG.60.B1.02 - VLT is a registered Danfoss trade mark
★ = factory setting. ( ) = display text [ ] = value for use in communication via serial communication port
Programming
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
reference 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
★ 1.0 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. If the current limit is to be used as motor
protection, the rated motor current must be set. If the
current limit is set within the range of 1.0-1.1 x I
VLT,N
(the rated output current of the VLT frequency
converter), the VLT 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
correspondingly.
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
in the system.
These output frequencies can be programmed in
parameters 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 H
Z ★ 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.
Description of choice:
Enter the frequencies to be avoided.
See also parameter 216 Frequency bypass,
bandwidth.
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