From OpenSCADAWiki
Creation an external module to OpenSCADA
Creation an external module to OpenSCADA may make sense in the case of the development the integration interface with business (commercial) systems that require proprietary interaction code, as well as in the case of other commercial interfaces implementations in which the module for the OpenSCADA acquire the status of the separate project, that is distributed and maintained independently often in the form of binary buildings for a specific platform and version of OpenSCADA. The license of such modules, respectively, can be arbitrary.