Can a PLC be OPC client?
Table of Contents
Can a PLC be OPC client?
It is possible to read-write tags (DATA) in PLC from any OPC server. If OPC server communicated with PLC-A. i.e. OPC server read/write data from/to PLC-A. then is possible to take data in PLC-B from PLC-A through OPC sever.
Can you program a PLC with LabVIEW?
NI LabVIEW software can communicate with any programmable logic controller (PLC) in a variety of ways. OLE for Process Control (OPC) defines the standard for communicating real-time plant data between control devices and human machine interfaces (HMIs).
What is OPC Server in PLC?
The OPC server is a program that translates the hardware communication protocol used by a PLC into the OPC protocol. The OPC client software is a program that connects to the hardware, such as an HMI. The OPC client communicates with the OPC server to receive data or send commands to the hardware.
What is OPC server in Scada?
Open Platform Communications (OPC) is a series of standards and specifications for industrial telecommunication. OPC specifies the communication of the real-time plant data between control devices for different developers of SCADA software.
How does PLC communicate with LabVIEW?
In the LabVIEW Project window, right-click My Computer and select New»Library. This creates a new library for the shared variables, which are used to connect to the PLCs’ OPC tags. Right-click the newly created library and select Create Bound Variables…
How do I connect to OPC server?
1.3. Connect to an OPC server
- Right click on the OPC DataHub system-tray icon and choose Properties.
- In the Properties window, select OPC .
- Check the Act as an OPC Client box.
- Type in or select the necessary information as appropriate.
- Click the Apply button in the Properties Window.
What is OPC tag?
An OPC Tag is a symbolic name that can be applied to the spreadsheet cell of an In-Sight sensor or emulator. The tag can be visible to OPC clients so they can access the In-Sight spreadsheet cell data. In the context of the In-Sight OPC Classic Server, two types of OPC Tags exist: Job Tags and Sensor Tags.