OPC HDA Server Details

This chapter provides additional information on the WinCC OA OPC HDA Server.

Invalid Bit Mapping

Following mapping is used between the invalid bits in WinCC OA and the OPC quality information.

WinCC OA _offline.._bad	WinCC OA _offline.._default	OPC quality
FALSE	FALSE	good, non-specific (11000000)
FALSE	TRUE	good, local override (11011000)
TRUE	FALSE	bad, non-specific (00000000)
TRUE	TRUE	bad, non-specific (00000000)

Debug-Levels

In order to detect possible sources of error during the driver actions the command line options can be used for debugging. Use -helpdbg to view more information on all other options (see also Manager Options).

Debug level	Description
-dbg 10	General debug information for the OPC HDA Server manager.
-dbg 11	Information regarding the function calls of the manager.
-dbg 12	Detailed information for the queried historical values.