Luckily, there is an alternative to using DCOM for OPC called a 'tunnel', such as Softing's OPC Easy Connect OPC Tunnel product. To read the entire review. OPC Tunnel ensures reliable high-performance data exchange also across network boundaries through secure communication and avoids DCOM problems. Home→Tags opc tunnel. Softing announces the release of its new dataFEED OPC Suite addressing all the aspects of OPC communication with one product.

Softing OPC Servers are 32-bit applications that can be used on 64-bit systems in 32-bit mode without any limitations or performance reduction. Background information from the German Wikipedia entry (translated excerpt): The advantages of 64-bit CPUs include an easier calculation of large integer values. This offers benefits, for example, for encryption algorithms, graphical calculations (e.g.

Fixed point arithmetic for computer games), 64-bit file systems, or multimedia formats (MPEG2, MP3). Diskeeper Professional Edition V10 0.593. Another advantage over 32-bit architecture is that 64-bit systems can directly address more than four GB RAM. This is useful for applications with large memory requirements, such as video processing applications and database systems, provided they have been programmed for a 64-bit system. In most other applications – in particular, office applications – there is no subjectively noticeable speed advantage.

OPC Server: Softing OPC Servers provide an integrated web server interface where you can access the exact version information of an OPC server. To start the OPC server's web interface, open the context menu of the Tray Application and click “Show Web Pages.” The “Information” area can be accessed by all users without any user login. Note: You can only access the web pages of the OPC server when the server is running! Some of the tray applications also display the exact version information. OPC Toolbox: In the OPC Toolbox, the exact version information is contained in the “SOVersion.h” file. The version number can also be determined from the version of the “OTB.dll” file. You can find these files in the following directories: • 'C: Program Files Softing OPCToolkit V44x Windows core common' and • 'C: Program Files Softing OPCToolkit V44x Windows bin' OPC ActiveX Controls: You can determine the version number from the file version of “C: Program Files Softing OPCActiveX bin soaxcmn32.ocx.”.

The error 0x80070005 (Access denied) indicates a DCOM problem. The problem often lies in the user context used by COM/DCOM to launch the OPC Server (Microsoft DCOM Identity Setting). The Identity setting (dcomcnfg) also plays an important role by a local connection and even with our OPC Tunnel! In order to handle the underlying OPC Server in the OPC Tunnel correctly, the identity should be set to 'Interactive User'. This identity setting is applicable only when running in Application Mode and not as “Service”. Please configure the OPC Server/Client as “Application” in the OPC Tray (Running Mode) and change the identity in the DCOM configuration (dcomcnfg).