Danfoss VLT AutomationDrive FC 361 Series Design Manual page 14

Product Overview and Featur...
3.3.8 Motor Preheat
To preheat a motor in a cold or damp environment, a small
amount of DC current can be trickled continuously into the
motor to protect it from condensation and cold starts. This
3 3
function can eliminate the need for a space heater.
3.3.9 Programmable Set-ups
The drive has 4 set-ups that can be independently
programmed. Using multi-setup, it is possible to switch
between independently programmed functions activated
by digital inputs or a serial command. Independent set-ups
are used, for example, to change references, or for day/
night or summer/winter operation, or to control multiple
motors. The LCP shows the active set-up.
Set-up data can be copied from drive to drive by
downloading the information from the removable LCP.
3.3.10 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
as shown in Illustration 3.2.
12
VLT® AutomationDrive FC 361
Par. 13-51
SL Controller Event
Par. 13-43
Logic Rule Operator 2
Par. 13-11
Comparator Operator
Illustration 3.2 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].
Illustration 3.3 shows an example with 4 event/actions:
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Running
Warning
Torque limit
Digital input X 30/2
. . .
. . .
. . .
=
TRUE longer than..
. . .
. . .
Par. 13-52
SL Controller Action
Coast
Start timer
Set Do X low
Select set-up 2
. . .
st
MG06K102