code: def as_ab_write(self, start, data):
          
          wordlen = snap7.snap7types.S7WLByte
          type_ = snap7.snap7types.wordlen_to_ctypes[wordlen]
          size = len(data)
          cdata = (type_ * size).from_buffer_copy(data)
          logger.debug("ab write: start: %s: size: %s: " % (start, size))
          return self.library.Cli_AsABWrite(
              self.pointer, start, size, byref(cdata))
docs: This is the asynchronous counterpart of Cli_ABWrite.