Description of choice:
Set the required ramp time.
212
Quick-stop ramp-down time
Value:
0.02 - 3600.00 sec.
3.00 sec
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 generating 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
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 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.
4.4.2 Reference Function
The example shows how the resulting reference is calculated when
Preset
references
is used together with
Sum
and
Relative
in parameter 214
Reference function
. The formula for the calculation of the resulting ref-
erence can be seen in the section entitled
All about the FCD 300
. See also
the drawing in
Handling of references
.
The following parameters are preset:
Par. 204
Minimum reference
10 Hz
Par. 205
Maximum reference
50 Hz
Par. 215
Preset reference
15 %
Par. 308
Term.53, Analogue input
Reference
Par. 309
Term.53, min. scaling
0 V
Par. 310
Term.53, max. scaling
10 V
When parameter 214
Reference function
is set to
Sum
[0] one of the
preset
Preset references
(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:
Par. 214
Reference function
= Sum [0]:
Par. 204
Minimum reference
10.0 Hz
Reference contribution at 4 Volt
16.0 Hz
Par. 215
Preset reference
6.0 Hz
Resulting reference
32.0 Hz
When parameter 214
Reference function
is set to
Relative
[1] the defined
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:
Par. 214
Reference function
= Relative [1]:
Par. 204
Minimum reference
10.0 Hz
Reference effect at 4 Volt
16.0 Hz
Par. 215
Preset reference
2.4 Hz
Resulting reference
28.4 Hz
The graph shows the resulting reference in relation to the external ref-
erence, which varies from 0-10 Volt. Parameter 214
Reference function
is programmed to
Sum
[0] and
Relative
[1] respectively. Also shown is
a graph in which parameter 215
Preset reference 1
is programmed to 0
%.
214
Reference 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
External/preset
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.
4 Programming
VLT
®
Decentral FCD 300 Design Guide
82
MG.90.S1.02 - VLT
®
is a registered Danfoss trademark
4
