The German Industrie 4.0 platform, consisting of ZVEI, VDMA, and BITKOM, has jointly reached important milestones in the standardization of Industrie 4.0. The first version of a reference architecture model for Industrie 4.0 (RAMI 4.0) which precisely describes Industrie 4.0-compliant production equipment, has been developed.
OPC UA is listed as the one and only recommendation for realizing the ‘communication’ layer.
The RAMI4.0 paper is currently a 100+ page paper in German language. It is being translated now. Find a short 2 page English version and visit the ZVEI RAMI 4.0 webpage or download the PDF version here.