过程数据对象和服务数据对象通信在CANopen列车网络中的应用

Application of PDO and SDO in CANopen Train Network

CANopen因其实时性高、成本低等优势成为目前列车网络的主流协议。提出了利用PDO(过程数据对象)和SDO(服务数据对象)的特殊通信方式,解决CANopen协议在列车网络应用中局限性的方案。可单独使用PDO或SDO的特殊通信方式以满足需求,也可以两种方式配合使用来满足更复杂的功能需求,这样可以有效提高CANopen列车网络的灵活性和可靠性。

CANopen has become the mainstream protocolin train network because of its advantages in real-time applica- tion and low cost. A special process data object（PDO） and service data object （SDO） communication scheme is pro- posed to solve the limitations of CANopen protocol in train network applications. This special communication means of PDO and SDO can be used separately and together to meet complicated demands, thus the flexibility and reliability of CANopen train networkcan be effectively improved.