Danfoss VLT AQUA Drive FC 202 Design Manual page 26

Product Features
5.2.11 Smart Logic Control (SLC)
Smart logic control (SLC) is a sequence of user-defined
actions (see parameter 13-52 SL Controller Action [x])
executed by the SLC when the associated user-defined
event (see parameter 13-51 SL Controller Event [x]) is
evaluated as TRUE by the SLC.
The condition for an event can be a particular status, or
that the output from a logic rule or a comparator operand
becomes TRUE. The condition leads to an associated action
5 5
as shown in Figure 5.3.
Par. 13-51
SL Controller Event
Running
Warning
Torque limit
Digital input X 30/2
. . .
Par. 13-43
Logic Rule Operator 2
. . .
. . .
Par. 13-11
Comparator Operator
=
TRUE longer than..
. . .
. . .
Figure 5.3 SLC Event and Action
Events and actions are each numbered and linked in pairs
(states), which means that when event [0] is fulfilled
(attains the value TRUE), action [0] is executed. After the 1
action is executed, the conditions of the next event are
evaluated. If this event is evaluated as true, then the
corresponding action is executed. Only 1 event is
evaluated at any time. If an event is evaluated as false,
nothing happens in the SLC during the current scan
interval and no other events are evaluated. When the SLC
starts, it only evaluates event [0] during each scan interval.
Only when event [0] is evaluated as true, the SLC executes
action [0] and starts evaluating the next event. It is
possible to program 1–20 events and actions.
When the last event/action has been executed, the
sequence starts over again from event [0]/action [0].
Figure 5.4 shows an example with 4 event/actions:
24
®
VLT AQUA Drive FC 202
Par. 13-52
SL Controller Action
Figure 5.4 Order of Execution when 4 Events/Actions are
Programmed
Coast
Start timer
Set Do X low
Select set-up 2
Comparators
. . .
Comparators are used for comparing continuous variables
(output frequency, output current, analog input, and so on)
to fixed preset values.
Figure 5.5 Comparators
Logic rules
Combine up to 3 boolean inputs (TRUE/FALSE inputs) from
timers, comparators, digital inputs, status bits, and events
using the logical operators AND, OR, and NOT.
Par. 13-40
st
Logic Rule Boolean 1
Par. 13-42
Logic Rule Boolean 2
Figure 5.6 Logic Rules
Danfoss A/S © 01/2018 All rights reserved.
Par. 13-11
Comparator Operator
Par. 13-10
Comparator Operand
=
TRUE longer than.
Par. 13-12
Comparator Value . . .
. . .
Par. 13-41
Logic Rule Operator 1
. . .
. . .
Par. 13-44
Logic Rule Boolean 3
Par. 13-43
Logic Rule Operator 2
. . .
. . .
MG22B222