[?]: Need help to connect PLC to Matlab

[npopov]

Hy.

I have Siemens PLC S300.
He is connected to computer (which have Matlab and WinCC) with MPI.
I have PID control in PLC. The variable in PLC is in system memory. (For example Set point is type REAL and on location M4).
I have structure tag in WinCC on this location.

How can I read/write from/to this location with Matlab? I don't know from where to start.

[Scowl]

May be OPC helps you. I know Matlab can use OPC for the communications.

[Dreadnoult]

May be OPC helps you. I know Matlab can use OPC for the communications.

MatLab OPC Toolbox -> OPC (Tag Managment->Add New Driver->OPC.chn) -> S7-300

[npopov]

thanks for help.