OPC (originally OLE for Process Control) is a set of communication protocols used to bridge proprietary SCADA systems, PLCs, and historian databases. It acts as a universal translator so devices from different vendors can exchange real-time plant data. Because it relies heavily on Windows network security and DCOM settings, connections often break silently, earning it a reputation for being fragile and frustrating to troubleshoot.
Heard on the job
The historian isn't logging any breaker operations because the OPC server lost its connection to the RTU.
Insider tip
When an OPC connection fails on the shop floor, technicians often joke that it stands for 'Oh Please Connect'.
Also heard as
- Open Platform Communications
- OLE for Process Control