S5-95F Error Diagnosis and Elimination
Determine the cause of error.
Ascertain the identifier for the main error report by viewing the contents of byte 1, and
locate the associated plaintext message in the table below.
If indicated in the table, also ascertain the auxiliary info by reading bytes 2 to 7.
Ascertain the time at which the error occurred.
View bytes 12 to 15 to find out the date and time when the error occurred (serves a
practical purpose only when the integrated clock was properly set).
Overview of Error Reports
Table 15-2. Evaluating System Events in DB254
Error No.
(Decimal)
Primary
Information
Auxiliary
Information
Corrective
Measures
01 Hardware fault on the CPU
board
(Error response: Hard STOP or
soft STOP)
Replace basic unit
02 Hardware fault on the internal
power supply board
(Error response: Hard STOP)
Replace basic unit
03 Subunit synchronization error
(Error response: Soft STOP)
Check fiber-optics link
Check switch setting or
subunit ID
04 Too many interrupts
(Error response: Soft STOP)
Shorten OB2
Reduce no. of INTs
Replace basic unit
05 Hardware clock failed
(Error response: Flag)
Replace basic unit
06 Basic units have different
version numbers
(Error response: Hard STOP)
Check version nos.
Replace basic unit
07 Internal RAM error (hardware
fault)
(Error response: Hard STOP)
Replace basic unit
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EWA 4NEB 812 6210-02
15-11
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