Deriving guidelines for cross-vendor reuse of IEC 61131-3 modules based on Normalized Systems theorems
We illustrate that designing cross-vendor reusable modules in automation systems is hard. Some theoretical foundations on how to design reusable modules are given. Five dependency problems in IEC 61131--?3 projects are illustrated. Three rules are proposed in order to avoid these dependencies.
iec 61131-3 normalized systems modularity black box