F_IolIsBusy

Function indicates whether a function block is still being processed.

Sample

VAR
  hr                :HRESULT;
  fbIIolStdVarSlave :FB_IolStdVarSlave;
  nRead             :DWORD;
END_VAR

hr := fbIIolStdVarSlave.read(16#0019, 0, ADR(nRead), SIZEOF(nRead));
IF NOT F_IolIsBusy(hr) THEN
  IF FAILED(hr) THEN
    //Error Handling
  ELSE
    //Success
  END_IF
END_IF