See also: OPC

Technology OPC appeared in 1995. This technology dedicated to the interworking of system industrialists meant initially OLE for Process Control . OPC is not a Communication protocol but a technology based on technologies OLE, COM, and DCOM developed by Microsoft for its family of operating systems. Today, OPC is a trade mark of Foundation OPC. the technologies developed by Foundation OPC are based not only on COM/DCOM but also on work of W3C and OASIS. Specifications OPC can be separate in two categories:

1. specifications based on COM/DCOM

2. specification based the service Web.

The first category included:

• OPC Common
• OPC Dated Access
• OPC Alarm and Event
• OPC Historical Data Access

The second category gathers only one specification broken up into several part OPC Unified Architecture.

External links

• OPC Foundation
• Formation OPC