_xChannelPLCActivateRead (Function) CIFX_xChannelPLCActivateWrite [...] _xChannelPLCIsReadReady (Function) CIFX_xChannelPLCIsWrite

output data to write [...] write Output ENO BOOL

and write into the

by write or read

restricted by write or

by write or read

write over the buffer

FileSetPosAsync (FunctionBlock) SysFileWrite

write variables b

_APP_ONLINECHANGE UDINT 3 OP_APP_WRITE