Set Windows Security Options
Sometimes the following error has been found in the log file:
WCCOAopc (1), xxxxxx, IMPL, SEVERE, 54, Unexpected state, OPCServer, initialize, Could not start OPCEnum on remote server: xxx.xxx.xxx.xxx
In this case, to allow the WinCC OA Opc driver to connect to the remote OPCEnum, the following additional DCOM configuration must be performed on the remote machine:
- In the Windows search box on the taskbar, enter Control Panel.
- Select Administrative Tools.
- Select Local Security Policy.
- Navigate to Security Settings > Local Policies > Security Options.
- In the right pane, right-click Network access: Let Everyone permissions apply to anonymous users, and select Properties.
- Choose the Enabled option.
- Click Apply.
- Click OK.
