The jog ramp time starts if a jog-signal is given via the
LCP control panel, one of the digital inputs or the serial
communication port.
Description of choice:
Set the required ramp time.
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 gen-
erating 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 activa-
ted via the digital inputs, serial communication or via
the LCP control panel, on the condition that this is ac-
tive 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
. It is also possible by using the
Exter-
nal/preset
to select whether a shift between external
references and preset references is required.
External reference is the sum of the analogue refer-
ences, pulse references and any references from se-
rial communication.
Description of choice:
If
Sum
[0] is selected, one of the adjusted preset ref-
erences (parameters 215-218
Preset reference
) is
summarized as a percentage of the reference range
(Ref
MIN
- Ref
MAX
), added to the other external referen-
ces.
If
Relative
[1] is selected, one of the added preset ref-
erences (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 dig-
ital 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 in-
fluence, 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.
VLT
®
2800 Series
= factory setting, () = display text, [] = value for use in communication via serial communication port
MG.27.A2.02 - VLT
®
is a registered Danfoss trademark
31
Programming
Summary of Contents for VLT 2800 Series
Page 1: ...VLT 2800 MG27A202 VLT 2800 Operating Instructions Operating Instructions...
Page 62: ...192H4893 VLT 2800 Series MG 27 A2 02 VLT is a registered Danfoss trademark 61 Installation...
Page 76: ...VLT 2800 Series MG 27 A2 02 VLT is a registered Danfoss trademark 75 All about VLT 2800...
Page 77: ...VLT 2800 Series 76 MG 27 A2 02 VLT is a registered Danfoss trademark...
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