Opc Protocols - GE Mark VIe System Manual

4.1 OPC Protocols

The Object Linking and Embedding for Process Control (OPC) protocols are widely-adopted standards for communication
between vendors across different industries. The OPC Foundation provides the specification for the standards, as well as
programming proxy stubs. Supported OPC protocols include:
• OPC Data Access (DA) communicates real-time data
• OPC Alarms and Events (AE) for alarm and event messaging and management
• OPC Unified Architecture (UA) that integrates OCP-DA and OPC-AE into a common framework
Refer to the following documents for additional information:
• WorkstationST OPC DA Server Instruction Guide (GEI-100621)
• WorkstationST OPC AE Server Instruction Guide (GEI-100624)
• WorkstationST OPC UA Server Instruction Guide (GEI-100828)
• ToolboxST User Guide for Mark Controls Platform (GEH-6703) for OPC UA configuration from the Mark VIe controller
and Mark VIe for OPC DA, AE, HDA, and UA configuration from the WorkstationST server
• ControlST Software Suite How-to Guides (GEH-6808), chapters How to Interface to Third Parties Using and How to
Configure OPC AE Capability
4.1.1 WorkstationST OPC DA Server
OPC Data Access (DA) is designed for real-time data flow between industrial controllers and supervisory functions, such as
HMIs and data historians. The WorkstationST-based OPC DA server includes an EGD server and SDI interface for non-EGD
variables. In Mark controls applications, the OPC DA server is commonly used to interface with the CIMPLICITY Advanced
Viewer and Proficy historian.
Communication Protocols
WorkstationST OPC DA Server Example
Public Information
GEH-6721_Vol_I_BP System Guide 101