S5-95F Error Diagnosis and Elimination
15.4 Acknowledging Errors and Deleting Entries in the System Event DB
Acknowledge an error only after
• A failsafe response has been initiated
• The reported error has been rectified.
The S5-95F's response to an error or fault depends on its gravity. For this reason, there are several
different ways to acknowledge an error, depending on
• the operating mode
and
• the system response.
Acknowledging Errors
Table 15-3. Acknowledging System Events
System response Acknowledged by Comments
Hard STOP Overall reset
- via programmer
- manual (see 2.5.4)
All error flags in DB254 are reset
Soft STOP RUN/STOP switch on both
subunits to STOP, then
RUN/STOP switch on both
subunits to RUN
All error flags in DB254 are reset
Passivation of I/Os Starting depassivation block
FB255 with job number 1,x
(see Chapter 9)
Error flags in DB254 belonging to
signal group x are reset
Standard value formation
(AND, OR, old value) for
deviating DI signals
and
setting of flag in DB254
and
subsequent response at
the user level
Starting depassivation block
FB255 with job number 0,0
(see Chapter 9)
All error flags in DB254 are reset
Error report (state of load
voltage and backup battery
Starting depassivation block
FB255 with job number 0,0
(see Chapter 9)
All error flags in DB254 are reset
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EWA 4NEB 812 6210-02
15-19
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