What is OPC technology solving, and what is OPC

I don't know if you refer to the OPC communication protocol commonly used in the field of industrial control. Something based on the Windows system. But this one or two sentences are not clear, or search for some detailed documents on the Internet and take a closer look. ]

3. All OPC (OLE for Process Control) technology refers to the establishment of an interface standard for the communication between industrial control system applications and the establishment of a unified data access specification between industrial control equipment and control software.

It provides a standard data access mechanism for the field of industrial control, effectively separates the hardware from the application software, and is a set of vendor-independent software data exchange standard interfaces and procedures, which mainly solves the problem of data exchange between the process control system and its data source, and can provide transparent data access between various applications.

The advent of OPC bridges the gap between Windows-based applications and field process control applications. In the past, in order to access data from field devices, every application software developer had to write a dedicated interface function. Due to the wide variety of field devices and the continuous upgrading of products, it often puts a huge burden on users and software developers.

Often, this is not enough to meet the actual needs of the job, and system integrators and developers urgently need a plug-and-play device driver that is efficient, reliable, open, and interoperable. In this context, the OPC standard came into being. The OPC standard is based on Microsoft's OLE technology, which is developed by providing a set of standard OLE COM interfaces, and the OPC technology uses OLE 2 technology, which allows multiple microcomputers to exchange documents, graphics and other objects.

OPC is based on the OLE COM mechanism as the communication standard for applications. OLE COM is a client-server model with the advantages of language agnostic, reusable, and easy integration. OPC regulates the interface functions, regardless of the form of the field device, the customer can access it in a unified way, so as to ensure the transparency of the software to the customer, so that the user is completely separated from the low-level development.

There must be an OPC interface between the application and the OPC server, and the OPC specification provides two sets of standard interfaces: the Custom standard interface and the OLE automation standard interface. Usually in the system design, the OLE automation standard interface, the OLE automation standard interface, and the OLE automation technology is used to call, and the technology is the OLE automation technology described in the previous section.

The OLE automation standard interface defines the following three layers of interfaces, which are in a sequential containment relationship: 1) OPC server: OPC starts the server, obtains the starting class of other objects and services, and uses it to return OPC group class objects.

2) OPC GROUP: Stores group information composed of several OPC items and is used to return OPC item class objects.

OPC (OLE for Process Control) is an industry standard for OLE for process control.

The international organization that administers this standard is the OPC** Council, which currently has more than 220 members. Worldwide, including all the world's major automation control, instrumentation and process control system companies.

Based on Microsoft's OLE (now Active X), COM (Part Object Model) and DCOM (Distributed Part Object Model) technologies. OPC includes a standard set of interfaces, attributes, and methods for process control and manufacturing automation systems.

OPC is based on Microsoft's Distributed Internet Application (DNA) architecture and Component Object Model (COM) technology, and is designed for ease of scalability. The OPC specification defines an industry-standard interface before a key.

OPC is based on the OLE COM mechanism as the communication standard for applications. OLE COM is a client-server model with the advantages of language agnostic, reusable, and easy integration.

opc：ole in process control

OPC is a set of component object model interface standards that provide efficient information integration and interaction between Windows-based industrial applications.

OPC is a set of industry standards developed by the world's leading multinational automation companies and software and hardware vendors.

OPC is based on Microsoft's OLE COM and DCOM technologies, and defines a set of standard interfaces to provide software application interoperability and device interoperability between automation and control applications, device management, and devices.

OPC builds a "bridge" between different types of servers and different types of customers in industrial control software, through which a simple and standardized plug-and-play link relationship is formed between customer servers, and different customers can access any data source.

In this way, developers can concentrate a lot of manpower and money on developing a driving service program on the development of a single OPC interface, and only need to develop a highly optimized, reusable OPC server to access the underlying hardware. At the same time, the user no longer needs to know about the interface for integrating the different components and can concentrate on solving the implementation of the automation functions.

OPC is the English abbreviation of proanthocyanidins oligomer, which is the substance with the strongest antioxidant, free radical scavenging and anti-aging effects found in medical research today. Repeated studies have confirmed that there is "proanthocyanidins OPC" in grape seeds, which can effectively remove excess free radicals in the body, and the antioxidant capacity is 50 times that of vitamin E and 20 times that of vitamin C. At present, its antioxidant power has been internationally recognized, and in recent years, OPC has also been widely used in the field of anti-allergy, the most effective of which is Portricam OPC capsules.

3 All OPC is the abbreviation of OLE for Process Control, that is, OLE applied to process control.

Originally meant to connect and embed objects, OLE has expanded far beyond this concept with the release of OLE 2. Today's OLE includes many new features, such as unified data transfer, structured storage, and automation, and has become a specification independent of computer languages, operating systems, and even hardware platforms.

OPC is built on top of the OLE specification, which provides a standard data access mechanism for the industrial control sector. The field of industrial control uses a large number of field devices, and before the advent of OPC, software developers needed to develop a large number of drivers to connect these devices.