ALM-5080 CAN BUS Communication Abnormal

Description

This alarm is reported when the CAN main control module finds that the communication between the CAN node and CAN sub-nodes is faulty.

Attribute

Alarm ID Alarm Severity Alarm Type
5080 Major Fault

Parameters

ID Name Meaning
1 Site No.

Number of the site where the faulty board or module is located

Value range: 0-2047
2 Board Type

Number of the type which the faulty board belongs to.

87:GTMU
3 Board No.

Number of the fault board

0:GTMU
4 PassNo

Number of the passage where the faulty board is located.
5 SubLink No.

Alarm sub-category number

0: CANBUS1 abnormal;

1: CANBUS2 abnormal;

3: CANS1 and CANBUS2 abnormal
6 Cell Index

Index of the cell where the board or module is located

0-2047: Cell index of the faulty cell in the data configuration

65535: None
7 Site Type

Type of the site where the faulty board is located.

17:DBS3900 GSM;

18:BTS3900 GSM;

19:BTS3900A GSM;
8 RackNo

Number of the rack where the faulty board is located.
9 BoxNo

Number of the subrack where the faulty board is located.
10 SlotNo

Number of the slot where the faulty board is located.
11 Site Name

Site Name
12 Alarm Attribute

Alarm Character

0:Normal

1:Transient Count

Impact on the System

  • If a bus is faulty, the system automatically switches to the backup bus.
  • If both buses are faulty, the system cannot communicate with external devices, the clock for baseband clocks is faulty, and the power monitoring function cannot be performed.

System Actions

If a bus is faulty, the system automatically switches to the backup bus.

Possible Causes

  • The power supply between the fans and the MPT is abnormal or the cable connection between the fans and the MPT is abnormal.
  • The fans are faulty.

Procedure

  1. Power off and power on the faulty board.
    1. Power off and power on the faulty board.
    2. Check whether the alarm is cleared:

      Y => The alarm is cleared. The alarm handling ends.

      N => The alarm is not cleared. Go to procedure 2.

  2. Remove the faulty board and reinstall it properly.
    1. Remove the faulty board and reinstall it properly.
    2. Check whether the alarm is cleared:

      Y => The alarm is cleared. The alarm handling ends.

      N => The alarm is not cleared. Go to procedure 3.

  3. Replace the board.
    1. Decide the type of the faulty board, and then replace the faulty board with a new one.
    2. Check whether the alarm is cleared:

      Y => The alarm is cleared. The alarm handling ends.

      N => The alarm is not cleared. Contact Huawei Customer Service Center.

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