November 2018
Intermediate to advanced
556 pages
14h 42m
English
Content preview from Hands-On Industrial Internet of Things
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OPC Classic
In 1995, various companies decided to create a working group to define an interoperability standard. These companies were the following:
- Fisher Rosemount
- Intellution
- Intuitive Technology
- Opto22
- Rockwell
- Siemens AG
Members of Microsoft were also invited to provide the support necessary. The goal of the working group was to define a standard for accessing information in the Windows environment, based on the current technology at that time.
The technology that was developed was called OLE for Process Control (OPC). In August of 1996, the first version of OPC was defined. The following diagram shows the different layers of OPC Classic with the underlying critical communication protocols—COM, DCOM, and Remote Procedure Call (RPC ...