Table of Contents
Advertisement
external references. If terminal 53 is applied to an analog
input voltage of 4 Volt the resulting reference will be:
Par. 214 Reference function = Relative [1]:
Par. 204 Minimum reference
Reference effect at 4 Volt
Par. 215 Preset reference
Resulting reference
The graph shows the resulting reference in relation to
the external reference, which varies from 0-10 Volt.
Parameter 214 Reference function is programmed
to Sum [0] and Relative [1] respectively. Also
shown is a graph in which parameter 215 Preset
reference 1 is programmed to 0 %.
214 Reference function
(REF FUNCTION)
Value:
Sum (SUM)
Relative (RELATIVE)
External/preset (EXTERNAL/PRESET)
Function:
It is possible to define how preset references are to
be added to the other references; for this purpose,
use Sum or Relative. It is also possible by using the
External/preset to select whether a shift between
external references and preset references is required.
External reference is the sum of the analog
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
= factory setting. () = display text [] = value for use in communication via serial communication port
MG.90.F2.22 - VLT is a registered Danfoss trademark
reference) is summarized as a percentage of
the reference range (Ref
the other external references.
If Relative [1] is selected, one of the added preset
10.0 Hz
references (parameters 215-218 Preset reference)
16.0 Hz
is summarized as a percentage of the sum of
2.4 Hz
present external references.
28.4 Hz
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.
NOTE
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).
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%
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
of the other external references, depending on the
choice made in parameter 214 Reference function.
[0]
The choice between preset references can be made
[1]
via the digital inputs or via serial communication.
[2]
Preset ref., msb
0
0
1
1
Description of choice:
Set the preset reference(s) that is/are to be the options.
Decentral Solutions
- Ref
), added to
MIN
MAX
- Ref
) or as a percentage
MIN
MAX
Preset ref. lsb
0
Preset ref. 1
1
Preset ref. 2
0
Preset ref. 3
1
Preset ref. 4
0.00%
123
Advertisement
Table of Contents
