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Section
9-3
Error Log
133
9-3-1 Error Log Table
Errors are recorded in an error log table in the Board’s RAM, with one record for
each error and a maximum of 39 records.
Serious errors are also recorded in the Board’s EEPROM so that when the pow-
er to the Board is turned OFF or reset, a record of the error will remain. (The error
log table in EEPROM automatically reads the Board’s RAM when the power is
turned ON again.)
Item
Specification
No. of records
39 max.
Data code
Binary (Times are in BCD)
Length of each record
10 bytes
Configuration of records
Error code: 2 bytes
(Refer to 9-3-2 Error Codes)
Detail code: 2 bytes
(Refer to 9-3-2 Error Codes)
Time: 6 bytes
(Refer to the Time Information)
Record order
From the oldest record to the most
recent.
If the number of records exceeds 39, the oldest record will be deleted and the
most recent error recorded.
Error Log Table Configuration
Record Configuration
Details
Minutes
Seconds
Day Hour Year Month
Error code
1st byte
10th byte
10 bytes
10 bytes
10 bytes
1 record
1 record
1 record
Maximum 39 records
Time Information
The time is recorded in BCD with one byte each for the year (the rightmost two
digits), month, day, hour, seconds, and minutes of the time the error occurred.
Note The computer’s time information can be read and used in the Controller Link
Support Board. When the time cannot be read from the computer, all error log
times will be 0. When error logs are read from the Controller Link Support Soft-
ware, they will be dated 0 s, 0 min, 0 hr, 0 day, 0 month, 2000.
9-3-2 Error Codes
The following table lists the error codes (in 4-digit hexadecimal) and the contents
of the errors.
Error
code
Contents
Detail code
Correction
Recorded
in
code
1st byte
2nd byte
in
EEPROM
0001
Hex
CPU Unit watchdog timer error
00 Hex
00 Hex
Replace the CPU Unit.
Yes
0002
Hex
CPU Unit service monitor error
Monitor time (ms)
Check the environment settings.
Yes