Troubleshooting
7-5
TI545/TI555 System Manual
• SF/Loop
Follows PLC to Program Mode — informational comment.
•
PLC Fatal Error = a description, causes, and corrective actions are
listed in Section 7.3.
•
PLC Non-fatal Error = a description, causes, and corrective actions are
listed in Section 7.4.
•
Loop Fatal Error = status word 161 (STW161) reports the causes and
indicates the corrective actions.
•
Loop Non-fatal Error = status word 162 (STW162) reports the causes
and indicates the corrective actions.
•
Battery = On indicates the backup battery is switched On
and
good
;
Off indicates the backup battery is switched Off or bad
.
•
Download select switch is not user accessible and is always Off.
•
Program in [RAM or ROM]; RAM if system is operating from RAM
memory; ROM if system is operating from an EEPROM (EPROM).
TI545/TI555
Operational Status
Scan = 027 milliseconds
Battery = On
Key = Unlocked
Download = Of
f
Mode = Run
Program in RAM
SF/Loop Mode = Run
SF/Loop Follows P/C to Program Mode
Fatal Error
= None
Loop Fatal Error
= None
Non Fatal Error
= None
Loop Non Fatal Error = None
Figure 7-1 Typical
AUX Function 29 Scr
een
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