Lenze PLC Designer PLC Designer (R3-1) - Manual (Page 295)

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DMS 4.1 EN 03/2011 TD29 293
• Within parallel connections in a LD network no insert positions will be offered
when dragging a box element from the ToolBox. Reason: A POU call (box) needs a
direct connection to the power rail.
Abb. 112 Example: Insert positions for box element in LD network
• In the LD editor boxes for the call of certain operators automatically are inserted
with EN and ENO resp. only EN in- and outputs. EN and ENO connections get those
which have a non-boolean output (for example ADD, SEL, BOOL_TO_INT), only an
EN input get those which have a boolean output (for example EQ, GE, GT). At a box
with an ENO output it is not possible to insert a further box at the other outputs of
this box.
• VAR_IN_OUT parameters of an inserted POU box are marked with a bidirectional
arrow .
Abb. 113 Display of VAR_IN_OUT parameters
• Function block boxes have an editable field above the box where you have to enter
the name of the instance variable. If a box representing the instance of a function
block instance gets replaced by inserting another function block type, the instance
has to be redefined also.
• In functions and function blocks, the formal names of the in- and outputs are
displayed. The main output of the function (return value) however is displayed
without name.
• In case the box interface has been changed, you can update the box parameters
(for example modified number of outputs) by command Update parameters. The
update will not be done automatically as it is in »PLC Designer« V2.3!