TCP_ReadBuffer (FB)

FUNCTION_BLOCK TCP_ReadBuffer EXTENDS CBM.LTrig

Like TCP_Read this function block serves to read data from the previously established connection given in hConnection. As long as xEnable is TRUE the handle of the connection is valid. The function block returns the handle of the buffer containing the data. If xReady is TRUE, data has been read successfully and the handle of the buffer is valid. The buffer is passed on and not copied like at TCP_Read.

InOut:

Scope Name Type Comment Inherited from Input xEnable BOOL TRUE: Action starts FALSE: Action stops, outputs xDone, xBusy, xError are resetted LTrig Output xDone BOOL TRUE: Action successfully completed LTrig xBusy BOOL TRUE: Function block active LTrig xError BOOL TRUE: Error occurred, function block aborts action FALSE: No error LTrig Input hConnection CAA.HANDLE Output eError ERROR xReady BOOL hBuffer CAA.HANDLE