Product : ISaGRAF V3
Date : 5-March-1996
File : Xlangs.Automatic bridges between IEC languages.htm
Subject : automatic bridges between IEC languages
Keywords: IEC languages - FBD - LD - ST - IL - SFC
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The IEC defines an equivalence between some languages only:
FBD is a graphical form of ST
LD is a graphical form of IL
SFC has no equivalence in other languages
The main problem is that, doing cross language bridges, we loose a
large quantity of information about the semantic of one particular
language, and nearly everything about the formatting of the source
code. To summarize, let's say that, even if a cross language bridge
can be technically feasible, the result, even if it is correct, is
generally not readable, mainly because a graphic source code also
contains wiring points which must be described in other languages as
the use of intermediate variables.
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