reserved for system [...] 32 to 64 is reserved for IEC tasks

_IEC_HANDLE Method to close a file asynchronous. For details [...] SysFileClose POINTER TO t

_IEC_HANDLE Method to copy a file asynchronous. For details [...] SysFileCopy POINTER TO t

_IEC_HANDLE Method to delete a [...] . For details, see [...] SysFileDelete POINTER TO t

_IEC_HANDLE Method to open a file asynchronous. For details [...] SysFileOpen POINTER TO t

_IEC_HANDLE Method to read a file asynchronous. For details [...] SysFileRead POINTER TO t

_IEC_HANDLE Method to rename a [...] . For details, see [...] SysFileRename POINTER TO t

_IEC_HANDLE Method to write a file asynchronous. For details [...] SysFileWrite POINTER TO t

for COV [...] for COV subscription to be received

. This is used to get access for example to [...] GetSegmentAddress : POINTER TO BYTE