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A customer of mine is looking to integrate a new PLC to their manufacturing execution system. We're only supplying the hardware (ABB AC800M) and they will be using an existing ABB OPC server to read the relevant values off the PLC through a small piece of software they will write. In order to complete their software they recently asked me for the "exact addresses of all relevant variables".
I have only used OPC in connection with ABB Engineering Workplace (EW) and Operator Workplace where this addressing is done automatically by connecting the controller and applications to the OPC server so I don't really know what to answer. In EW, all you had to do was to create an object in your program, download and the object would automatically appear in the structures with a faceplate and graphic elements for your HMI.
How does one address and read data from an OPC server?
I have only used OPC in connection with ABB Engineering Workplace (EW) and Operator Workplace where this addressing is done automatically by connecting the controller and applications to the OPC server so I don't really know what to answer. In EW, all you had to do was to create an object in your program, download and the object would automatically appear in the structures with a faceplate and graphic elements for your HMI.
How does one address and read data from an OPC server?