Compatibility with OPC Tunneller Software

Certain third-party OPC tunneller software may attempt to launch a non-interactive VTS.exe as the OPC server instead of connecting to the already-running VTS.exe. Do the following to avoid problems:

 

• Configure the VTScada OPC Server (in DCOMCNFG) to disallow "Launch for all users" and to run VTScada as the interactive user.
• After installing the third-party OPC tunneller software, install the latest OPC Core Components from OPCFoundation.org.
• Run all configuration tools for the tunneller software as Administrator.
• Ensure that all necessary services related to the tunneller software and OPCEnum are running.
• Ensure that the server's firewall explicitly allows access to the port that the tunneller software uses.