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Error Log
Section 11-9
11-9 Error Log
Up to twenty errors detected and notified on the MC Unit can be stored in the
system variable in the MC Unit as the error log.
The system variables (error log) will be cleared when the power is restored or
the Unit is restarted. To store the error log, use the IORD instruction to make
the CPU Unit read and store it.
The error log is composed of 2 words for the number of stored records, and
120 (6 words
×
20 error records) words.
11-9-1 Area Configuration
• Errors are recorded up to 20 starting from the oldest error stored as Error
log 1.
• From the 21
st
error on, the oldest error is deleted and the newest is over-
written. For example, the 21
st
error is stored in the Error log 1, the 22
nd
error is stored in the Error log 2, and so on.
• The newest error is stored in the Error log with the number indicated by
the remainder of dividing SW0011: Error log No. of actual records by 20.
Variable
addresses
IORD
addresses
Name
Description
SW0010
3008h
Error log: No. of stored
records
Outputs the number of errors occurred after the power
ON. 0-20
SW0011
Error log: No. of actual
records
Outputs the number of errors occurred after the power
ON. 0-64000
SW0012
3009h
Error log 1: Error code
Outputs the code of the error.
SW0013
Error log 1: Detailed data
Outputs detailed data of the error.
SW0014
300Ah
Error log 1: Minute, Second
Outputs minutes and seconds of the time when the error
was generated.
SW0015
Error log 1: Day, Hour
Outputs days and hours of the time when the error was
generated.
SW0016
300Bh
Error log 1: Year, Month
Outputs year and month of the time when the error was
generated.
SW0017
Reserved
Reserved
:
:
SW0084
3042h
Error log 20: Error code
Outputs the code of the error.
SW0085
Error log 20: Detailed data
Outputs detailed data of the error.
SW0086
3043h
Error log 20: Minute, Second
Outputs minutes and seconds of the time when the error
was generated
SW0087
Error log 20: Day, Hour
Outputs days and hours of the time when the error was
generated.
SW0088
3044h
Error log 20: Year, Month
Outputs year and month of the time when the error was
generated.
SW0089
Reserved
Reserved
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