Danfoss VLT 5000 Series Operating Instructions Manual page 118

104). It is assumed that the output current is not higher
than the torque limit (set in parameter 221).
The jog ramp time starts if a jog signal is given
via the control panel, the digital inputs or the
serial communication port.
Description of choice:
Set the desired ramp time.
212 Quick stop ramp-down time
(Q STOP RAMP TIME)
Value:
0.05 - 3600 sec.
Function:
The ramp-down time is the deceleration time
from the rated motor frequency to 0 Hz, provided
no over- voltage arises in the inverter because
of generating operation of the motor or if the
generated current becomes higher than the torque
limit (set in parameter 222).
Quick-stop is activated by means of a signal on digital
input terminal 27, or via the serial communication port.
Description of choice:
Program the desired ramp-down time.
213 Jog frequency (JOG FREQUENCY)
Value:
0.0 - parameter 202
Function:
The jog frequency f is the fixed output frequency
JOG
at which the frequency converter is running when
the jog function is activated.
Description of choice:
Set the desired frequency.
= factory setting. () = display text [] = value for use in communication via serial communication port
MG.51.A9.02 - VLT is a registered Danfoss trademark
214 Reference function
Value:
Sum. (SUM)
Relative (RELATIVE)
External/preset (EXTERNAL/PRESET)
Function:
It is possible to define how the preset references
are to be added to the other references. For
this purpose, Sum or Relative is used. It is also
possible - by using the External/preset function - to
select whether a shift between external references
and preset references is desired.
Description of choice:
If Sum [0] is selected, one of the adjusted preset
references (parameters 215-218) is added as a
percentage of the maximum possible reference.
If Relative [1] is selected, one of the adjusted
preset references (parameters 215-218) is added
to the external references as a percentage
of the actual reference.
In addition, it is possible to use parameter 308 to select
whether the signals on terminals 54 and 60 are to be
depends on unit
added to the sum of the active references.
If External/preset [2] is selected, it is possible to shift
between external references or preset references
via terminal 16, 17, 29, 32 or 33 (parameter 300,
301, 305, 306 or 307). Preset references will be a
percentage value of the reference range.
External reference is the sum of the analogue
references, pulses and bus references. See also
drawings in section Handling of multi-references .
should be set to 0 % (as in the factory setting).
The example shows how to calculate the output
frequency if using Preset references together with
Sum and Relative in parameter 214.
10.0 Hz
Parameter 205 Maximum reference has been
set to 50 Hz.
®
VLT 5000 Series
(REF FUNCTION)
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
[0]
[1]
[2]
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