CAN总线切断的检测及处理

Inspecting and Disposing to CAN Bus-cutting

基于CANopen应用层协议,使用其网络管理对象的节点监护,提出CAN总线切断状态的判断方法。在CAN网络中设置备用主节点,在总线切断的紧急状态下,使断开的子网段内部能保持通信,并通过网络自身的管理能力使断开的子网中的节点尽量保持正常功能,防止系统崩溃。

It puts forward a method to inspect the cut-off of CAN bus, which uses node-guard or heart-beat protocol, a kind of network management object, base on CANopen application layer. When the CAN bus was cut off, it keeps communication in subnet at the exigence, and manage subnets retaining normal functions, avoiding the system collapse.