Ras Function; Initial Check Error; Errors During Power Up - Toshiba V Series User Manual

Chapter 6 Troubleshooting

6.8 RAS Function

6.8.1

Initial check error

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If S2 detects an error in self-diagnosis, it enters the corresponding error message in the
error log table, and if this error makes the continuation of operation impossible, turns off
all outputs and stops operation (error down).
The error log table stores the latest 32 error messages and the time of occurrence that
can be displayed by the engineering tool.
In addition to the error log, the table stores the following information that can also be
displayed by the engineering tool:
• Event log: Power supply ON and OFF data, mode control data
• Transmission log: Information on transmission via Ethernet, etc.
The FLT LED on the front of S2 blinks during power up if an error is detected in the initial
check by S2. Contents of the error are indicated with the FLT LED as shown in the table
below.
Check causing errors
CPU operation check
Boot area sum check
OS work area R/W check
FROM ID check
OS program sum check
User memory data erasure error
Table 6-1 Errors during power up
RUN/FLT LED blinks every operation
FLT LED blinks once
RUN/FLT LED blinks once and repeats it at intervals.
FLT LED blinks three
RUN/FLT LED blinks once and repeats it at intervals.
FLT LED blinks four
RUN/FLT LED blinks once and repeats it at intervals.
→
FLT LED blinks five
RUN/FLT LED blinks once and repeats it at intervals.
Only FLT LED blinks
(Continued after memory clear when the system starts from
ROM.)
model 2000 Sequence Controller S2 User's Manual -Basic Hardware-
RUN/FLT LED
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