Danfoss VLT AutomationDrive FC 300 Design Manual page 48

3. Introduction to FC 300
3
Illustration 3.4: Brake release sequence for hoist mechanical brake control
3.8.3. Cabling
EMC (twisted cables/shielding)
To reduce the electrical noise from the wires between the brake resistor and the frequency con-
verter, the wires must be twisted.
For enhanced EMC performance a metal screen can be used.
3.9.1. Smart Logic Control
The Smart Logic Control (SLC) is essentially a sequence of user defined actions (see par. 13-52)
executed by the SLC when the associated user defined
TRUE by the SLC.
Events
event [1]
event [2]
and actions are placed in array parameters.
Only one
(in the SLC) during the present scan interval and no other
that when the SLC starts, it evaluates
event [1]
It is possible to program from 0 to 20
actions
and
been executed, the sequence starts over
again from
tion shows an example with three
actions
48
actions
and are each numbered and are linked in pairs called states. This means that when
is fulfilled (attains the value TRUE),
will be evaluated and if evaluated TRUE,
event will be evaluated at any time. If an
is evaluated TRUE, the SLC executes
event / action
. When the last
event [1] / action [1]
. The illustra-
:
MG.33.B9.02 - VLT
event
(see par. 13-51) is evaluated as
action [1] is executed. After this, the conditions of
action [2]
will be executed and so on. Events
event is evaluated as FALSE, nothing happens
events
event [1] event [1]
(and only
action [1]
and starts evaluating
events
has
events /
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FC 300 Design Guide
will be evaluated. This means
) each scan interval. Only when
event [2]
.