GEA ARIETE, Instructions For Use And Maintenance Manual

Page: 457 / 556

VLT
®
5000 Series
The jog ramp time starts if a jog signal is given via
the control panel, the digital inputs or the serial com-
munication port.
Description of choice:
Set the desired ramp time.
212
212 Quick stop ramp-down time
(Q STOP RAMP TIME)
Value:
0.05 - 3600 sec.
✭
depends on unit
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 be-
comes higher than the torque limit (set in parameter
222).
Quick-stop is activated by means of a signal on digi-
tal input terminal 27, or via the serial communication
port.
Description of choice:
Program the desired ramp-down time.
213
213 Jog frequency (JOG FREQUENCY)
Value:
0.0 - parameter 202
✭
10.0 Hz
Function:
The jog frequency f
JOG
is the fixed output frequency
at which the VLT frequency converter is running
when the jog function is activated.
Description of choice:
Set the desired frequency.
214
214 Reference function
(REF FUNCTION)
Value:
✭
Sum. (SUM)
[0]
Relative (RELA TIVE)
[1]
External/preset (EXTERNAL/PRESET)
[2]
Function:
It is possible to define how the preset references are
to be added to the other references. For this pur-
pose, Sum or Relative is used. It is also possible -
by using the External/preset function - to select
whether a shift between external references and pre-
set references is desired.
Description of choice:
If Sum [0] is selected, one of the adjusted preset
references (parameters 215-218) is added as a per-
centage of the maximum possible reference.
If Relative [1] is selected, one of the adjusted preset
references (parameters 215-218) is added to the ex-
ternal references as a percentage of the actual
reference.
In addition, it is possible to use parameter 308 to se-
lect whether the signals on terminals 54 and 60 are
to be 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 per-
centage value of the reference range.
External reference is the sum of the analogue refer-
ences, pulses and bus references. See also
drawings in section Handling of multi-references .
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
should be set to 0 % (as in the factory setting).
The example shows how to calculate the output fre-
quency if using Preset references together with Sum
and Relative in parameter 214.
Parameter 205 Maximum reference has been set to
50 Hz.
✭
= factory setting. () = display text [] = value for use in communication via serial communication port
MG.51.A1.02 - VLT is a registered Danfoss trade mark
123
Programming