Reference Function - Danfoss VLT Decentral FCD 300 Operating Instructions Manual

3 Programming
Description of choice:
Set the required ramp time.
212 Quick-stop ramp-down time
Value:
0.02 - 3600.00 sec.
Function:
The quick-stop ramp-down time is the deceleration time from the rated
3
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
is activated via one of the digital inputs or the serial communication.
Description of choice:
Set the required ramp-down time.
213 Jog frequency
Value:
0.0 - Par. 202 Output frequency high limit, f

3.4.2 Reference Function

The example shows how the resulting reference is calculated when
references
is used together with
Reference function
. The formula for the calculation of the resulting ref-
erence can be seen in the section entitled
the drawing in Handling of references
The following parameters are preset:
Minimum reference
Par. 204
Par. 205 Maximum reference
Preset reference
Par. 215
Term.53, Analogue input
Par. 308
Term.53, min. scaling
Par. 309
Term.53, max. scaling
Par. 310
Reference function
When parameter 214
Preset references
preset (par. 215-218) is added to the external referen-
ces as a percentage of the reference range. If terminal 53 is applied an
analogue input voltage of 4 Volt will be the resulting reference:
Reference function
Par. 214
Minimum reference
Par. 204
Reference contribution at 4 Volt
Preset reference
Par. 215
Resulting reference
Reference function
When parameter 214
Preset references (par. 215-218) are added as a percentage of the total
of the present external references. If terminal 53 is applied to an ana-
logue input voltage of 4 Volt the resulting reference will be:
Reference function
Par. 214
Minimum reference
Par. 204
Reference effect at 4 Volt
Preset reference
Par. 215
Resulting reference
52
3.00 sec
Current limit I
. Quick-stop
LIM
10.0 Hz
MAX
Preset
Sum Relative
and in parameter 214
All about the FCD 300 . See also
.
10 Hz
50 Hz
15 %
Reference
0 V
10 V
Sum
is set to [0] one of the
= Sum [0]:
10.0 Hz
16.0 Hz
6.0 Hz
32.0 Hz
Relative
is set to [1] the defined
= Relative [1]:
10.0 Hz
16.0 Hz
2.4 Hz
28.4 Hz
MG.04.B8.02 - VLT is a registered Danfoss trademark
Function:
Jog frequency f means a fixed output frequency that the frequency
JOG
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.
The graph shows the resulting reference in relation to the external ref-
erence, which varies from 0-10 Volt. Parameter 214
Sum Relative
is programmed to [0] and
a graph in which parameter 215 Preset reference 1
%.
214 Reference function
Value:
Sum (sum)
Relative (relative)
External/preset (external/preset)
Function:
It is possible to define how preset references are to be added to the other
references; for this purpose, use Sum
External/preset
using the to select whether a shift between external ref-
erences and preset references is required.
External reference is the sum of the analogue references, pulse referen-
ces and any references from serial communication.
VLT® Decentral FCD
Reference function
[1] respectively. Also shown is
is programmed to 0
[0]
[1]
[2]
or Relative . It is also possible by