VLT
®
6000 HVAC Series
Programming
NB!:
If Sum or Relative is selected, one of the
preset references will always be active. If the
preset references are to be without influence,
they should be set to 0% (as in the factory setting)
via the serial communication port.
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
✭ 1.1 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 frequency
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
,itmustbeensured
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 accordingly.
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 protection.
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
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.
✭ = factory setting. () = display text [] = value for use in communication via serial communication port
MG.61.A5.02 - VLT is a registered Danfoss trademark
97
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