Error Log - Omron SYSMAC CPM2B Operation Manual

Error Log

4-6

Error Log

Error log pointer
DM 2000
DM 2021
Error log record 1
(3 words used.)
DM 2022
DM 2023
to
DM 2019
Error log record 7
(3 words used.)
DM 2020
DM 2021
Note
1,2,3...
88
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The error log function registers the error code of any fatal or non-fatal error
that occurs in the PLC. The date and time at which the error occurred are reg-
istered along with the error code. The error code is also stored in AR 253.
The error log is stored in DM 2000 through DM 2021. Up to 7 error records
can be stored.
Indicates the number of records stored in the log (0 to 7). A 0 indi-
cates no records.
Each error log record is configured as follows:
15
Leading word Error classification
Leading word + 1 Min
Leading word + 2 Day
Error classification: 00: Non-fatal
1. An error record with an error code of 00 will be stored in the error log for
power interruptions. Refer to 8-3 Self-diagnostic Functions for tables listing
error codes.
2. In CPU Boards without a clock, the time that the error occurred will be set
to all zeroes.
Error Log Storage Methods
The error log storage method is set in the PLC Setup (bits 00 to 03 of DM
6655). Set any of the following methods.
1. DM 6655 bits 00 to 03 set to 0:
Stores the most recent 7 error log records and discard older records. This
is achieved by shifting the records as shown below so that the oldest
record (record 0) is lost whenever a new record is generated.
Error log record 1
Error log record 2
Error log record 6
Error log record 7
2. DM 6655 bits 00 to 03 set to 1:
Stores only the first 7 error log records, and ignores any subsequent errors
beyond those 7.
3. DM 6655 bits 00 to 03 set to any value other than 0 or 1:
Disables the log so that no records are stored.
The default setting is the first method. Refer to the preceding page for details
on the error log settings in DM 6655.
Clearing the Error Log
To clear the entire error log, turn ON SR 25214 from a Programming Device.
(After the error log has been cleared, SR 25214 will turn OFF again automati-
cally.)
Section 4-6
8 7 0
Error code
Sec
Each stored in
2 digits BCD.
Hour
80: Fatal
Lost
All records shifted
New record added