| 摘要 |
Method of producing real time graphs for automatic systems. Graphs are constructed and executed according to representations of SFC/Grafcet under the form of pseudo-FBD components.. In a graph the symbols (FBD), which permit coding of a Grafcet, must present two types of input/output, for connections, that is those which route state and those which route analogue data or All or Nothing data. In the same function (FBD) is joined a stage (Stxy) and a transition (Trxy) In the semantic of the (FBD), an output can be linked to several inputs, but an input is only linked to an output. While in (SFC), the divergence on OR is represented as a connection between one or more output(s) stage(s) and several transition inputs. A convergence in OR is represented as a connection between several transition outputs and one or more input(s) stages. In the semantic (SFC) one can re-loop the output of a transition on the input of any stage. The Grafcet functions are executed in synchronous fashion with the pseudo-FBD functions, whilst respecting the Shannon Theorem.
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