1. Meanings of the parameters in the BUS_ERR alarm are defined as follows in related product manuals:
The first parameter indicates that the bus is faulty, and this parameter is always 0x01.
The second and the third parameters indicate the number of the bus sending the alarm, and the two parameters occupy two bytes. The value range of the second and the third parameters: 0x01 0x2c � 0x01 0x30, 0x01 0x40 � 0x01 0x44.
0x01 0x2c � 0x01 0x30 indicates that the active XCS board is faulty; 0x01 0x40 � 0x01 0x44 indicates that the standby XCS board is faulty.
2. For example, the TDG board reports: 129028 102 BUS_ERR CR start
2007-12-28 16:40:53 None 0x01 0x01 0x2c 0xff 0xff
According to the parameters, the TDG board knows that No.300 bus of the active XCS board is faulty, and automatically receives signals from the standby XCS board.