Slc Application Example - Danfoss VLT AQUA Drive Design Manual

®
VLT AQUA Drive Design Guide
It is possible to program from 0 to 20
event / action
has been executed, the sequence starts over again from
event [1] / action [1] . The illustration shows an example with three
events / actions :
6.1.5. Smart Logic Control Programming
New useful facility in VLT AQUA Drive is the Smart Logic Control (SLC).
In applications where a PLC is generating a simple sequence the SLC may take over elementary tasks from the main control.
SLC is designed to act from event send to or generated in the VLT AQUA Drive . The frequency converter will then perform the pre-programmed action.

6.1.6. SLC Application Example

One sequence 1:
Start – ramp up – run at reference speed 2 sec – ramp down and hold shaft until stop.
Set the ramping times in par. 3-41 Ramp
( . 1 − 25 )
t acc × n norm par
t ramp
=
ref RPM
Set term 27 to No Operation (par. 5-12 Terminal
Set Preset reference 0 to first preset speed (par. 3-10 Preset
60%
Set preset reference 1 to second preset speed (par. 3-10 Preset
Set the timer 0 for constant running speed in par. 13-20 SL
events actions
and . When the last
1 Ramp Up Time
and par. 3-42 Ramp
27 Digital Input )
Reference [0]) in percentage of Max reference speed (par. 3-03 Maximum
Reference
Controller Timer
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MG.20.N4.02 - VLT is a registered Danfoss trademark
1 Ramp Down Time
to the wanted times
[1] Ex.: 0 % (zero).
[0]. Ex.: 2 sec.
6. Application Examples
6
Reference ). Ex.:
135