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Error History Function Section 8-2
• Detail codes
• The times at which errors occurred (using the CPU Unit's time data)
Error History Save Area When an error is detected, the contents of the error and the time at which it
occurred are registered as an error history in the Unit's internal RAM. Serious
errors are registered not only in RAM but also in EEPROM. The error history
registered in EEPROM is saved during a power interruption or when the Unit
is restarted. When the CompoNet Master Unit is started, the error history in
EEPROM is copied to RAM.
When the contents of the error history are read by a FINS command or the
CX-Integrator, it is the error history saved on RAM that is read. When the error
history is cleared (either by a FINS command or the CX-Integrator), however,
it is cleared from both RAM and EEPROM.
Reading or Clearing Error
History Tables
Use FINS commands to the CompoNet Master Unit to read or clear the Error
History Table. Use the CompoNet Master Unit as the destination address for
FINS commands.
CompoNet Master Unit address: 20 hex + unit number
For instructions on using FINS commands, refer to the CS/CJ-series PLC
Communications Command Reference Manual (Cat. No. W342).
For details on FINS commands for CompoNet Master Units, refer to Appendix
A.
Note The CPU Unit's time information is read and used by the CompoNet Master
Unit. If this time information cannot be read from the CPU Unit, the error his-
tory time information will be shown as all zeros. In addition, for CS/CJ-series
PLCs, the time setting for the CPU Unit's built-in clock must be reset when the
power is turned ON after replacing the battery. If the time is not reset, correct
time information will not be registered. When the error history is read, the time
information will be unreliable.
Error Code and Detailed Information Tables
Error
code
(hex)
Error contents Detailed information EEP
ROM
First byte Second byte
0001 CPU Unit WDT error 00 hex 00 hex ❍
0002 CPU Unit service monitoring error (Ser-
vice from the CPU Unit is irregular.)
Monitoring time (ms) ❍
0006 Other CPU Unit errors Bit 14: Unit number duplication
Bit 11: No applicable Unit in Registration Table
All other bits are reserved.
❍
000F CPU Unit initialization error 00 hex 00 hex ❍
0011 Event timeout MRC SRC ❍
0012 CPU Unit memory error 01 hex: Read error
02 hex: Write error
03 hex: Routing Table ❍
0101 Transmission is not possible because
local node is not participating in the net-
work.
×
0103 Transmission is not possible because of
too many resends.
Command
Bit 15: OFF
Bits 14 to 8: SNA
Bits 7 to 0: SA1
×
0106 Transmission is not possible because of
an address duplication error.
×
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