Danfoss VLT 5000 FLUX User Manual

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 speed1) 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
83

Danfoss VLT 5000 FLUX Specifications

General

Brand	Danfoss
Model	VLT 5000 FLUX
Category	DC Drives
Language	English