Only one
event
will be evaluated at any time. If an
event
is evaluated as FALSE, nothing happens (in the SLC) during the present scan interval and no
other
events
will be evaluated. This means that when the SLC starts, it evaluates
event [1]
(and only
event [1]
) each scan interval. Only when
event
[1]
is evaluated TRUE, the SLC executes
action [1]
and starts evaluating
event [2]
.
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
A new useful facility in VLT AQUA Drive is the Smart Logic Control (SLC).
In applications where a PLC generates a simple sequence, the SLC may take over elementary tasks from the main control.
SLC is designed to act from event send to, or it is generated in the VLT AQUA Drive. The adjustable frequency drive will then perform the pre-programmed
action.
VLT
®
AQUA Drive Design Guide
6 Application Examples
MG.20.N5.22 - VLT
®
is a registered Danfoss trademark
6-3
6
