What does an OPC server do?

OPC is a client/server technology. One application acts as the server providing data, and the other acts as a client using data. OPC is a widely accepted industrial communication standard that enables the exchange of data between multi-vendor devices and control applications without any proprietary restrictions.

How do I connect to two OPC servers?

The only way for two OPC Servers to communicate is to have an OPC Client application provide a bridge between the two servers, thus becoming an “OPC Bridge.” The OPC Bridge connects two or more OPC Servers together.

What ports does OPC use?

When an OPC client connects to an OPC server, it connects to port 135 (the RPC port mapper), which assigns one TCP port and one UDP port to the component. Communication between client and server is directed to those ports.

What is OPC bridging?

OPC Data Bridge is a plug and play solution allowing you to easily configure, display, and monitor real-time and multithreaded data transfers from any OPC source server to any OPC destination server, thus providing full integration for all of your processes and an easy way to synchronize and exchange data between …

Can OPC DA client connect to OPC UA server?

OPC DA uses DCOM to communicate and communication with DCOM over Internet cannot be done efficiently. Fortunately, OPC UA uses single port TCP communication which can be used over Internet with ease. OPC DA nodes can be connected to separate UaGateways which communicate with OPC UA to each other.

Is PLC a OPC server or client?

OPC is implemented in server/client pairs. The OPC server is a software program that converts the hardware communication protocol used by a PLC into the OPC protocol. The OPC client software is any program that needs to connect to the hardware, such as an HMI .

What is OPC server in DCS?

OPC stands for Open Platform Communications or some say OLE (Object Linking and Embedding) for Process Control. It is a type of protocol used in Industrial Automation. The OPC is always used in the Client/Server pair. The OPC server converts the hardware communicated data from PLC into OPC protocol.

What is the difference between Modbus and OPC?

Modbus devices are generally RS485, and OPC UA devices are Ethernet, so there has to be some hardware conversion: new processor, gateway, daughter card, etc.