, for example BinaryInput.Change [...] change of object state. Prior to first change

Ua_DataTypeAttributes : STRUCT InOut: Name [...] Ua_UInt32 DisplayName Opc [...] Ua_UInt32 UserWriteMask Opc

Ua_ObjectTypeAttributes : STRUCT InOut: Name [...] Ua_UInt32 DisplayName Opc [...] Ua_UInt32 UserWriteMask Opc

Name Type Return IecVarAccGetSymbolSetMask DWORD Input hUser RTS

_T_DP_PRM_DATA : STRUCT InOut: Name [...] user_prm_data ARRAY

also means ‘user is [...] Name Type Return

ErrorNumber Handle InstanceName [...] Instance OnAfterOnlineChange [...] Instance OnBeforeOnlineChange

online change, an online change must be [...] Name Type Comment

Out: Name Initial Comment [...] ClientRequestStateChange [...] 16#10000 SysComHandlerStateChange

Name Type Comment [...] (online change).