Movicon Help on Line - Rel. 11.7.1301
OPC is the most commonly used standard due to its user-friendly communication modalities based on different bus technologies.
OPC stands for "OLE for Process Control", where OLE refers to the Windows' abbreviation of: "Object Linking and Embedding", a powerful automation interface for the Windows applications.
OPC simply rounds off the programming concept which implements an unified interface of different bus technologies on one part and programs for vision and automation on the other. Thanks to the standard technologies, today's communication between automation devices means more independence for the individual producer, especially when their apparatus supports the OPC standard. Thanks to the unified interface, hardware producers can always guarantee OPC interface availability by equipping their hardware product with OPC Server software products. This will ensure the user of being able to interface their purchased product with any applied software supporting the OPC standard.
The OPC standard is defined by public specifications released by the OPC Foundation consortium which are adhered to by Microsoft and all the major automation manufactures worldwide including Emerson. |
Movicon is an application based both on the OPC Client and OPC Server standards.
As Client it can interface with all the OPC Serves with follow the 1.0A and 2.0 standards; as Server it allows all or part of the project variables to be shared with other applications and notifies them of events such as: Alarms, messages, system information and variable changes within the project.
In view of the increasing consolidation of the OPC standard in industrial automation, this technology must be considered as a communication mode with bus network devices or with other local or remote applications only.
This figure shows a block diagram of a typical OPC communication.
OPC XML DA Client
The OPC XML DA resource is no longer compatible with Movicon components starting from the 11.5.1180 version. Therefore the OPC XML DA feature can only be used up to the Movicon 11.4 version.