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Error Log Section 10-3
150
Error Log Table Each error is recorded as one record in an error log table. Up to 64 records
can be saved. If more than 64 errors occur, the oldest errors will be deleted
from the error log and the most recent error will be recorded.
The following information is recorded in the error log table.
• Main error code (See table later in this section.)
• Detailed error code (See table later in this section.)
• Time stamp (from the clock in the CPU Unit)
Error Log Location When an error is detected, the error codes and time stamp are recorded in the
error log in RAM inside the FL-net Unit. Serious errors are also recorded in
EEPROM. The maximum number of errors that can be saved to EEPROM is
32. The errors recorded in EEPROM will be saved even if the Unit is restarted
or power is turned OFF. When the FL-net Unit is started, the contents of the
error log in EEPROM are copied to RAM.
When a FINS command is used to read the error log, the log held in RAM is
read. The error log cannot be cleared.
FINS Commands for Error
Logs The FL-net Unit’s error log can be read using the CX-FLnet or FL-net Unit
Support Software. The following FINS commands can also be used to read or
clear the error log. For details on each command, refer to
7-5 Command/
Response Reference .
10-3-2 Error Log Error Codes
The error codes are described in the following table. The detailed error code
will provide detailed information on an error.
Command
code
Function
MRC SRC
21 02 ERROR LOG READ
Error
code
Meaning Detailed error code Correction EE-
PROM
1st byte 2nd byte
0001 Watchdog timer error in CPU Unit 00 00 Replace the CPU Unit. Saved
0002 CPU Unit service monitor error monitoring time (ms) Check the operating environment. Saved
0006 Other CPU error Bit 11: Unit not in Registered
I/O Tables Create the I/O tables. Saved
000F CPU Unit initialization error 00 00 Replace the CPU Unit. Saved
0010 Insufficient System Setup Area 00 00 Reduce the number of CPU Bus
Units. Saved
0011 Event timed out 01: Read
error
02: Write
error
03: Routing
table
04: Setup
error
05: CPU Bus
Unit Words
(CIO/DM)
Replace the CPU Unit. Saved
0012 CPU Unit memory error 01: Recreate the data specified by
the 2nd byte of the detailed error
code.
02: Clear memory using proce-
dure in the PLC operation manual.
Saved
0013 CPU Unit protected 00 00 Remove protection from CPU Unit
memory. Saved
0040 Self-removal Undefined Check the communications cable
hub connection. Use the CX-
FLnet or FL-net Unit Support Soft-
ware to increase the value for the
minimum allowable frame interval. ---