Service manual

116 System Tests
C.8 DZ Controller Status and Error Messages
TEST NUMBER ID NAME
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C 0080 DZ
All errors detected during the DZ system exerciser are considered to
be fatal. If the exerciser is being executed in Customer Services or
manufacturing mode, then loopback connectors are required on the
appropriate ports. If an error is detected during these modes, check that
the loopbacks are installed before changing the system module.
Error messages will be displayed as follows:
0LSS.EEEE
The error message is broken up into two fields. The first field, ’0LSS’,
represents the status word. The second field, ’EEEE’, represents the
error code.
The status word portion of the error message from this test will be broken
into two fields. The upper byte, ’0L’, will indicate the line preempted by
the console. The lower byte, ’SS’ will give additional information on the
error code as follows:
Status
Code Meaning
0 The error code is broken into four fields with each digit of the error code
corresponding to one line on the DZ. The least significant four bits of the
error code represents line 0.
FF Device fatal error. The entire error code indicates the error.
0F System software error. The entire error code indicates the error.
Error descriptions for status code = 0:
0X00.ABCD
where X represents the line preempted by the console and A, B, C, D
represents a 4-bit error field for each line. ’A’ represents 4 bits for line
3, ’B’ represents 4 bits for line 2, ’C’ represents 4 bits for line 1, and
’D’ represents 4 bits for line 0.