A CAN network can be configured to work with two different message (or "frame") formats: the standard or base frame format (described in CAN 2.0 A and CAN 2.0 B), and the extended frame format (only described by CAN 2.0 B).
CAN网络可以配置为使用两种不同的消息（或“帧”）格式：标准或基本帧格式（在CAN 2.0 A和CAN 2.0 B中描述）和扩展帧格式（仅由CAN 2.0 B描述）。