Process control network (PCN) layer

The Process Control Network (PCN) Layer contains the production nodes (Data Servers, AppServers, etc.) that process and store all production data.

This layer requires that all nodes have unrestricted access to each other, in order to process the data in real-time.

Data sources are represented in the previous figure by the Legacy and Remote Domain sub-layers. These layers may also represent geographically distant sites which may be leased to other enterprises, and whose data is required by the parent company.