VLT
®
5000 FLUX
Programming
Description of choice:
Set the desired frequency.
214 Reference function
(REF FUNCTION)
Value:
✭
Sum. (SUM)
[0]
Relative (RELATIVE)
[1]
External/preset (EXTERNAL/PRESET)
[2]
Function:
To define how the preset references are to be added to
the other references. For this purpose,
Sum
or
Relative
is used. It is also possible - by using the
External/preset
function - to select whether a shift between external
references and preset references is desired.
Description of choice:
If
Sum
[0] is selected, one of the adjusted preset
references (parameters 215-218) is added as a
percentage of the maximum possible reference.
If
Relative
[1] is selected, one of the adjusted
preset references (parameters 215-218) is added
to the external references as a percentage
of the actual reference.
If
External/preset
[2] is selected, it is possible to shift
between external references or preset references
via terminal 16, 17, 29, 32 or 33 (parameter 300,
301, 305, 306 or 307). Preset references will be a
percentage value of the reference range.
External reference is the sum of the analog
references, pulses and bus references. See also
section
Reference Handling
.
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 must be set to 0 % (factory setting).
The example shows how to calculate the output
speed by using
Preset references
together with
Sum
and
Relative
in parameter 214.
Parameter 205
Maximum reference
has been
set to 1500 rpm.
Par. 204
Min. reference
In-
crease
[rpm/V]
Speed
by 4.0 V [rpm]
Par. 215
Preset ref.
Par. 214 Reference
type =
Sum
[0]
Par. 214 Reference
type =
Relative
[1]
Output speed [rpm]
Output speed
1)
0
150
600
15 %
0+600+225 = 825
0+600+90 = 600
2)
300
120
480
15 %
300+480+180=960
300+480+72 = 852
3)
600
90
360
15 %
600+360+135=1095
600+360+54=1014
4)
900
60
240
15 %
900+240+90=1230
900+240+36=1176
5)
1200
30
120
15 %
1200+120+45=1365
1200+120+18=1338
The values are valid for a 4 pole asynchronous motor.
✭
= factory setting. () = display text [] = value for use in communication via serial communication port
MG.55.A6.02 - VLT is a registered Danfoss trademark
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