3. OPC Technology
• OPC DA (now “Classic”): Uses DCOM
InduSoft Web Studio
• OPC XML: Uses XML/SOAP – evolution from DCOM to .Net and
WCF
• OPC UA: evolution of OPC – no DCOM at all, it can go to any OS
OPC Client Modules • OPC .Net: uses WCF (Windows Communication Foundation)
DA 2.05, UA, .Net
XML 1.0 / DA 3.0
OPC Communications
OPC Servers
Proprietary Communications