VLT
®
4000 VT
Programming
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
preset ref. lsb
Terminal 16/29/32
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 AFD), the AFD 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 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.
Description of choice:
Enter the frequencies to be avoided.
See also parameter 216
Frequency bypass, bandwidth
.
MG.40.A7.22 - VLT is a registered Danfoss trademark
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