Danfoss VT2800 Series User Manual

VLT
®
2800 Series
Programming
214 Reference function
(REF FUNCTION)
Value:
✭Sum ( SUM )
[0]
Relative (RELA TIVE)
[1]
External/preset (EXTERNAL/PRESET)
[2]
Function:
It is possible to define how preset references are to
be a dded to the other references; for this purpose,
use Sum or Relative.Itisalsopossiblebyusingthe
External/preset to select whether a shift between
external references and preset references is required.
External reference is the sum o f the analogue
references, pulse references and any references
from serial communication.
Description of choice:
If Sum [0] is selected, one of the adjusted
preset references (parameters 215-218 Preset
reference) is summarized as a percentage of
the reference range (Ref
MIN
-Ref
MAX
), added
to the other external references.
If Relative [1] is selected, one of the added
preset references (parameters 215-218 Preset
reference) is summarized as a percentage of the
sum of present external references.
If External/preset [2] is selected, it is possible via
a digital input to shift between external references
or preset references. Preset references will be a
percentage value of the reference range.
NB!:
If Sum or Relative is selected, one of the
preset references will always be act ive. If the
preset references are to be without influence,
they must be set to 0% (factory setting).
215 Preset reference 1 (PRESET REF. 1)
216 Preset reference 2 (PRESET REF. 2)
217 Preset reference 3 (PRESET REF. 3)
218 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 215 -218 Preset reference.
The preset reference is stated as a percentage of the
reference range (Ref
MIN
-Ref
MAX
) or as a percentage
of the other external references, depending on the
choice made in parameter 214 Reference function.
The choice between preset references can be made
via the digital inputs or via serial communicat ion.
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 preset reference(s) that is/are to be the options.
219 Catch up/ Slow down reference
(CATCH UP/SLW DWN)
Value:
0.00 - 100% of the given re ference
✭ 0.00%
Function:
In this parameter, the percentage value can be
set which will either be added to or deducted
from the remote-controlled referenc es.
The remote-controlled reference is the sum of preset
references, analogue references, pulse reference and
any references from serial communication.
Description of choice:
If Catch up is active via a digital input, the percentage
value in parameter 219 Catch up/Slow down reference
will be added to the remote-controlled reference.
If Slow down is active via a digital input, the percentage
value in parameter 219 Catch up/Slow down reference
will be deducted from the remote-controlled reference.
✭ = factory setting. () = di splay text [] = value for use in communication via serial communicat ion port
MG.28.E9.02 - VLT is a registered Danfoss trademark
83

Danfoss VT2800 Series Specifications

General

Brand	Danfoss
Model	VT2800 Series
Category	Controller
Language	English