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.