UNE-EN IEC 61131-10:2019

This standard specifies an XML based exchange format for the export and import of IEC 61131-3 projects. A complete IEC 61131-3 project implemented in an IEC 61131-3 environment can be transferred between different programming environments. It allows for the exchange of configuration elements, data types, and POUs written in:

" the textual language, Instruction List (IL),

" the textual language, Structured Text (ST),

" the graphical language, Ladder Diagram (LD),

" the graphical language, Function Block Diagram (FBD), and

" Sequential Function Chart (SFC).

The exchange format is specified as a corresponding XML schema. The XML schema is an independent file with the .xsd extension and as such part of this specification. A description of this schema is contained in this standard. It is assumed that the reader of this standard is familiar with XML technology.

The usage of the XML exchange format should provide more than a simple export / import from one development environment to another. All relevant information should be exported. This may include coordinate information for graphical tools. The importing tool should be able to filter which parts of this information need to be imported into its destination environment. Vendor specific information and attributes may be included in the export file and selectively imported, if applicable. The vendor specific information shall not influence the logic part of the program. Filtering should be done on the import thus vendors shall take care that their extensions of the XML schema shall be done in such a way that neglecting the information during import does not affect the functionality of the IEC 61131-152 3 project. Vendor specific attributes and information may be added by vendor specific XML schema besides the XML exchange format defined in this standard.

The described formats are designed for the import and export of IEC 61131-3 projects. Such an IEC 61131-3 project can be under development and as a consequence be incomplete.

Concerning the exchange of graphical language constructs between different Programming Systems, the focus is on logical information with optional explicit graphics.