VLT
®
2800 Series
Programming
212 Quick-stop ramp-down time
(Q STOP RAMP TIME)
Value:
0.02 - 3600.00 sec.
✭ 3.00 sec (VLT 2803-2875)
10.00 sec (VLT 2880-2882)
Function:
The quick-stop ramp-down time is the deceleration
time from the rated motor frequency to 0 Hz, provided
no overvoltage arises in the inverter because of
generating operation of the motor, or if the generated
current exceeds the current limit in parameter 221
Current limit I
LIM
. Quick-stop is activated via one of
the digital inputs or the serial communication.
Description of choice:
Set the required ramp-down time.
213 Jog frequency
(JOG FREQUENCY)
Value:
0.0 - Par. 202 Output frequency high limit, f
MAX
✭ 10.0 Hz
Function:
Jog frequency f
JOG
means a fixed output frequency
that the frequency converter supplies to the motor
when the Jog function is activated. Jog can be
activated via the digital inputs, serial communication
or via the LCP control panel, on the condition that
this is active in parameter 015 Local jog.
Description of choice:
Set the required frequency.
214 Reference function
(REF FUNCTION)
Value:
✭Sum (SUM)
[0]
Relative (RELATIVE)
[1]
External/preset (EXTERNAL/PRESET)
[2]
Function:
It is possible to define how preset references are to
be added 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 of 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)issummarizedasapercentageof
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)issummarizedasapercentageofthe
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 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%
✭ 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 communication.
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.
✭ = factory setting. () = display text [] = value for use in communication via serial communication port
MG.28.A9.02 - VLT is a registered Danfoss trademark
31
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