Jog Frequency; Preset Reference - Danfoss VLT 2800 Series Operating Instructions Manual

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
212
(Q STOP RAMP TIME)
Value:
0.02 - 3600.00 sec.
Function:
The quick-stop ramp-down time is the deceleration
time from the rated motor frequency to 0 Hz, pro-
vided no overvoltage arises in the inverter because
of generating operation of the motor, or if the gener-
ated current exceeds the current limit in parameter
221 Current limit I . Quick-stop is activated via one
LIM
of the digital inputs or the serial communication.
Description of choice:
Set the required ramp-down time.

213 Jog frequency

213
(JOG FREQUENCY)
Value:
0.0 - Par. 202 Output frequency high limit, f
Function:
Jog frequency f means a fixed output frequency
JOG
that the frequency converter supplies to the motor
when the Jog function is activated. Jog can be acti-
vated 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
214
(REF FUNCTION)
Value:
Sum (SUM)
Relative (RELA TIVE)
External/preset (EXTERNAL/PRESET)
Function:
It is possible to define how preset references are to
be added to the other references; for this purpose,
= factory setting. () = display text [] = value for use in communication via serial communication port
MG.28.A5.02 - VLT is a registered Danfoss trade mark
®
VLT 2800 Series
use Sum or Relative. It is also possible by using the
External/preset to select whether a shift between ex-
ternal references and preset references is required.
External reference is the sum of the analogue refer-
ences, pulse references and any references from
serial 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 - Ref
MIN
3.00 sec
ences.
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 per-
centage 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)
215
216 Preset reference 2 (PRESET REF. 2)
216
MAX
217 Preset reference 3 (PRESET REF. 3)
217
10.0 Hz
218 Preset reference 4 (PRESET REF. 4)
218
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
centage 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 communi-
cation.
Preset ref., msb
[0] 0
[1]
0
[2]
1
1
), added to the other external refer-
MAX
- Ref ) or as a per-
MIN MAX
Preset ref. lsb
0 Preset ref. 1
1 Preset ref. 2
0 Preset ref. 3
1 Preset ref. 4
0.00%
27