800xA write to SCADA RTU
I have a SCADA RTU configured in my xA PLC Control Network as a Modbus TCP/IP device. I am reading data from the RTU and dispalying it on an xA graphic. Is it possible to write a value (say a pump start command) to the RTU from a function diagram in xA? I would rather not use a Property Transfer as it is not robust enough. Is there a better more secure way to do this? Thank you.
If the property you want to write to is presented by the OPC server and it is writable (as far as the OPC server is concerned and how it is configured in 800xA) it is possible, at least from a faceplate. Why from a Function Diagram? OPC is fine for HMI apploications but not something you want to rely on for actual automated control.