Error Diagnosis and Elimination S5-95F
15.3.8 Error Stack Entries
All errors detected by the operating system during a cycle are flagged in the error stack. The error
stack consists of:
• An error block counter
• A write pointer
• 16 error blocks of 8 data words each
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Data Word Contents of the Data Words
DW 61 Error block counter
DW 62 Write pointer
DW 63 Unassigned
DW 64 to 71 Error block 0 with bits for type of error, cause of error, auxiliary information
and time stamp
DW 72 to 79 Error block 1 with bits for type of error, cause of error, auxiliary information
and time stamp
DW 80 ....
.
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.
Error blocks 3 to 14
DW 184 to 191 Error block 15
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Error Block Counter
The operating system enters the number of errors which occurred in data word DW 61. The entry
may be a number between 0 and 65535.
Write Pointer
The write pointer identifies the last error block entered. This pointer is located in DL 62, and
contains the number of the error block+1.
15-8
EWA 4NEB 812 6210-02
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