Fatal Errors - Omron SYSMAC CP Series User Manual

6 Troubleshooting
6-1-8

Fatal Errors

CPU Unit Indicators
N
POWER
RUN
ERR/ALM
INH
BKUP
PORT1A
LINK/ACT
PORT1B
LINK/ACT
There may be a CPU error or a fatal error if operation stops (i.e., the RUN indicator turns OFF) and
the ERR/ALM indicator lights.
Data on fatal errors is displayed on the Errors Tab Page of the CX-Programmer's PLC Errors Win-
dow.
Take corrective actions after checking error details based on the CX-Programmer display message
together with the Auxiliary Area Error Flags and error information.
• Errors are listed in order with the most serious errors first.
• If two or more errors occur at the same time, the most serious error code will be stored in
A400.
• If the IOM Hold Bit has not been turned ON to protect I/O memory, all non-retained areas of I/O
memory will be cleared when a fatal error other than FALS occurs.
• I/O memory will be held when the I/O Memory Hold Bit is ON, but outputs will be turned OFF.
Memory Errors
An error has occurred in memory.
One or more bits in A403 will turn ON to indicate where the error has
occurred.
• Memory Error Location
A403.00 is ON
A403.04 is ON
A403.07 is ON
A403.11 is ON
A403.12 is ON
A403.14 is ON
6-8
: Not lit : Flashing : Lit
E/S
POWER
POWER
RUN
RUN
ERR/ALM
ERR/ALM
INH
INH
PRPHL
PRPHL
BKUP
BKUP
RS-232C
RS-232C
RS-485
RS-485
PORT1A
LINK/ACT
PORT1B
LINK/ACT
—: Irrelevant
Probable cause
A checksum error has occurred in the ladder pro-
gram. The power supply was turned OFF when
backing up the user program to backup memory.
A checksum error has occurred in the PLC Setup.
A checksum error has occurred in the routing tables.
(Only for N -type CPU Units)
A checksum error has occurred in IP address table.
(Only for N -type CPU Units)
A checksum error has occurred in IP router table.
(Only for N -type CPU Units)
I/O memory has not been backed up When power
was turned OFF.
—
—
—
—
—
—
—
See below.
Transfer the ladder program again.
Transfer the PLC Setup again.
Transfer the routing tables again.
Transfer the IP address table again.
Transfer the IP router table again.
Set I/O Memory again.
CP2E CPU Unit Hardware User's Manual(W613)
Possible remedy