It is possible to program from 0 to 20
events
and
actions
. When the last
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 Ramp Up Time
and par. 3-42
Ramp 1 Ramp Down Time
to the wanted times
t
ramp
=
t
acc
×
n
norm
(
par
. 1 − 25
)
ref
RPM
Set term 27 to
No Operation
(par. 5-12
Terminal 27 Digital Input
)
Set Preset reference 0 to first preset speed (par. 3-10
Preset Reference
[0]) in percentage of Max reference speed (par. 3-03
Maximum Reference
). Ex.:
60%
Set preset reference 1 to second preset speed (par. 3-10
Preset Reference
[1] Ex.: 0 % (zero).
VLT
®
AQUA Drive Design Guide 6 Application Examples
MG.20.N5.02 - VLT
®
is a registered Danfoss trademark
161
6
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