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1. Checked OPC Toolkits
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1. WinCC 6.0SP4 have OPC XML-DA client (should be selected during installation).
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It is available with IIS under "/wincc-opc-xml/DAWebService.asmx".
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However, the GetStatus request works OK, but Browse requests are failing.
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2. WinCC Flexible 2005 - I have found some marks of OPC XML-DA support, but
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was not able to access it in any way. It looks like the XML-DA support
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switches on automatically on WinCE devices and is swiched off (without
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posibility to get on) on all other platforms.
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Regarding marks it should be accessible under: "/soap/OpcXml".
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3. Connectivity Pack - Provides OPC access to the database. Not useful.
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4. SIMATIC NET - Provides OPC access to different underlying devices. I was
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not able to configure it to work just with existing OPC server. Useless.