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Errors and Alarm Troubleshooting Section 7-1
Note The CPU Unit's ALM/ERR Indicator will flash when a non-fatal error has
occurred and stay lit when a fatal error has occurred.
7-1-4 Error Log Data
The configuration of error log data including error codes is as follows. Error
log data is stored in RAM (battery-backed up) on the Loop Controller. The
configuration of each error log is as follows and is regarded as a single record.
Error log data is not stored in flash memory.
RAM can hold up to 256 of the latest records:
Error log data can be read using the FINS (READ ERROR LOG, [command
code 2102 Hex]) command.
A record is not made in the error log if an error for which the error code is
already stored in flash memory.
Not lit Not lit Lit
(A42400, the
Inner Board
WDT Error
Flag, is ON.)
An Inner
Board
WDT Error
occurred.
The Inner Board is mal-
functioning.
Operation is stopped
(fatal error.)
None Turn the power OFF
and ON again. Replace
the Loop Control Board
if the error recurs when
the power is turned
ON.
Lit
(A42401, the
Inner Board
Bus Error
Flag, is ON.)
Inner
Board Bus
Error
An Inner Board Bus
Error occurred.
Operation is stopped
(fatal error.)
0014 Mount the Loop Con-
trol Board securely.
Replace the Loop Con-
trol Board if the error
recurs after the Board
is secured and power
is turned ON again.
Lit
(A42403, the
Flash Mem-
ory Data Error
Flag, is ON.)
Parameter
backup
data (flash
memory)
error
One of the following
problems was detected
during a cold start with
the CS1W-LCB01/05 or
a cold or hot start with
the CS1D-CPU@@P.
1) The data was cor-
rupted by noise or other
factor.
2) The power was inter-
rupted during a backup.
(See note.)
3) The power was inter-
rupted during duplex ini-
tialization (CS1D-
CPU@@P only)
Note: If the function
block database (RAM) is
valid, the data will be
backed up when power
is turned ON again.
Operation is stopped
(fatal error.)
0331
The details
code con-
tains either
the rele-
vant block
address or
FFFF if all
data bases
are invalid.
Execute the Download
or Clear all operation
from CX-Process Tool
Version 3.0.
The Flash Memory
Data Error Flag
(A42403) will go OFF if
the data in RAM
becomes valid.
None of the
above
CPU Unit
Fatal Error
A fatal error occurred in
the CPU Unit.
Operation is stopped
(fatal error.)
None Refer to the CPU Unit's
Operation Manual and
clear the fatal error.
Flash-
ing
Not lit Lit CPU Unit
WDT Error
A CPU Unit WDT Error
occurred.
Operation is stopped
(fatal error.)
0001 Refer to the CPU Unit's
Operation Manual.
LED Indicators
on front of
Loop
Controller
LED
Indicator on
front of CPU
Unit
Problem Cause Status Error
code
(Stored in
error log.)
Corrective action
RDY EXEC ERR/ALM
(See note.)
1 record Error code
Detailed information
Date (year/month) and time (hour/minute/second) of occurrence
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