Lenze PLC Designer PLC Designer (R3-1) - Manual (Page 737)

L-force | PLC Designer
General Editors
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DMS 4.1 EN 03/2011 TD29 735
13.13.5 SFC Elements / Toolbox
The graphic elements usable for programming in the SFC editor window currently can
be inserted by using the insert commands, by default available in the SFC menu.
The SFC Toolbox currently is not yet implemented.
See also the help page on: Working in the SFC Editor.
The following elements are available and described in the following table: Step,
Transition, Action, Branch (Alternative), Branch (Parallel), Jump, Macro
Symbol Element name / Example Description
Step-Transition
step and subsequent transition:
initial step and subsequent transition:
Abb. 405 Transition in POUs
tree
A step is represented by a box containing the step
name and being connected to the preceding and
subsequent transitions by a line.
The step name can be edited inline.
Note: Step names must be unique in the scope
of the parent POU. Notice this especially when
using actions programmed in SFC.
The box frame of the init step is double-lined.
Notice that each step - by command 'Init step' or
by activating the respective step property - can be
transformed to an init step , that is to that step,
which will be executed first when the IL-POU is
called.
Each step is defined by the step properties.
Note: In contrast to »PLC Designer« V2.3 there is
only one type of steps, the IEC conforming steps.
The actions to be performed when the step is
active (processed) are to be associated (see below,
action).
Steps and transitions are basically inserted in
combination via command 'Insert step-transition
(after)'.
A transition is represented by a small rectangle
box connected to the preceding and subsequent
steps by a line. It provides the condition on which
the following step will get active (as soon as the
condition is TRUE).
By default automatically a transition "trans<n>" is
inserted, whereby n is a running number.
This default name should be modified:
A valid name is either
- the name of a transition object ( ) available in
the POUs tree (this allows multiple use of
transitions; see for example "t1" in the left
column)