OPC can be used as an interface to control other systems?
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When you read the article, you saw that the DCS communication interface DCS and SIS systems transmit DCS data to the SIS network through a dedicated OPC interface station. DCS communicates with the DEH system, electrical network control system and other auxiliary systems through the RS485 interface. The main signals are hard-wired. The OPC standard defines the method of exchanging automated real-time data between PC-based clients using the Microsoft operating system; RS485 is a serial physical interface standard. OPC can provide connections between different systems. Now some manufacturers use OPC as the data source for human-machine interfaces. Can OPC also communicate and control subsystems like MODBUS and PROFIBUS? Or is OPC mostly used to transmit data to the host computer?
OPC (OLE for Process Control, OLE for process control) is an industry standard. Based on Microsoft's OLE (now Active X), COM (Component Object Model) and DCOM (Distributed Component Object Model) technologies. OPC includes a standard set of interfaces, properties, and methods for use in process control and manufacturing automation systems. OPC is a software interface standard for connecting data sources (OPC servers) and data users (OPC applications). You should understand, right?
Can the data source provided by OPC be both read and written? Then do you think it is possible to control other systems?
Does OPC need to be like MODBUS, requiring address mapping on both sides for reading and writing?
Mainly the communication links between different systems.
Mainly used for communication, A to B or B to A, can be bidirectional. Subsystems can be controlled, but are generally not used.