Thank you for your reply. So it means that I should find Wincc OPC servers by matlab OPCTOOL command. When I brows the computer on which WinCC is installed i find the following OPC servers:
I have WinCC and Step7 + PLCsim on one computer and Matlab and (another copy of Step 7+ PLCsim) on another computer. Should all of the componenets installed on one computer?
Will it be possible to both read and write data to Simulink (and vise versa) by this method?