Danfoss VLT AutomationDrive FC 301 Programming Manual page 417

Programming Guide | VLT® AutomationDrive FC 301/FC 302
Smart logic control (SLC) is a sequence of user-defined actions (see parameter 13-52 SL Controller 1 Action) executed by the SLC when
the associated user-defined event (see parameter 13-51 SL Controller 1 Event) 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. That leads to an associated action
as illustrated:
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 78: Smart Logic Control (SLC)
Events and actions are each numbered and linked in pairs (states). This means that when the 1st event is fulfilled (becomes true), the
1st action is executed. After this, the conditions of the 2nd event are evaluated and if evaluated true, the 2nd action is executed, and so
on. 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. This means that when the SLC starts, it evaluates the 1st event (and only the 1st event) in each scan
interval. Only when the 1st event is evaluated as true, the SLC executes the 1st action and starts evaluating the 2nd 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 the 1st event/
action.
Four concurring sequences can be defined with each up to 20 event and action pairs. The sequences are executed at the same time but
operate separately. For example, sequence 1 may have executed 3 actions, while sequence 2 still waits for its 1st event to occur. In this
example, parameter 13-00 SL Controller Mode [0], parameter 13-01 Start Event [1], and parameter 13-02 Stop Event [2] correspond to
sequence 1, sequence 2, sequence 3, and the like.
Comparators Flip-Flops, timers, and logic rules are shared between sequences.
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Par. 13-52
SL Controller Action
Coast
Start timer
Set Do X low
Select setup 2
. . .
NOTICE
Parameter Descriptions
AU275636650261en-003201 / 130R0334 | 417