code: def write_by_name(adr, data_name, value, plc_datatype):
      # type: (AmsAddr, str, Any, Type) -> None
      
      if port is not None:
          return adsSyncWriteByNameEx(port, adr, data_name, value, plc_datatype)
docs: Send data synchronous to an ADS-device from data name.
  
      :param AmsAddr adr: local or remote AmsAddr
      :param string data_name: PLC storage address
      :param value: value to write to the storage address of the PLC
      :param int plc_datatype: type of the data given to the PLC,
          according to PLCTYPE constants