Fatal Errors - Omron CP1H CPU Operation Manual

Troubleshooting

11-2-3 Fatal Errors

Note
Memory Errors
■ CPU Unit Indicators
POWER RUN
ERR/ALM INH
BKUP PRPHL
There may be a CPU error or a fatal error if operation stops (i.e., the RUN indi-
cator turns OFF) and the ERR/ALM indicator lights. Error code for fatal errors
will be updated on the 7-segment display. If a CPU error occurs, the 7-seg-
ment display will remain unlit or the display will freeze.
Data on fatal errors is displayed on the Error Tab Page of the CX-Program-
mer's PLC Error Window.
Take corrective actions after checking error details based on the 7-segment
display or the CX-Programmer display message together with the Auxiliary
Area Error Flags and error information.
1. Errors are listed in order with the most serious errors first.
2. If two or more errors occur at the same time, the most serious error code
will be stored in A400.
3. I/O memory will be cleared if a fatal error occurs (except those created with
FALS instructions).
4. I/O memory will be held when the I/O Memory Hold Bit is ON, but outputs
will be turned OFF.
8.0. → f.1. →
→
Memory error location
Seven-segment display
8.0.→f.1.→ →0.0.→0.1.→ A checksum error has occurred in the user program.
→0.0.→1.0.→ A checksum error has occurred in the PLC Setup. Trans-
→0.0.→8.0.→ A checksum error has occurred in the routing tables.
→0.1.→0.0.→ A checksum error has occurred in the CPU Bus Unit
→0.1.→9.0.→ A PLC Setup error, routing table setting error, and CPU
→0.2.→0.0.→ Automatic transfer from the Memory Cassette at startup
POWER Lit
RUN Not lit
ERR/ALM Lit
INH ---
BKUP ---
PRPHL ---
→
Probable cause and possible remedy
Transfer the user program again.
fer the PLC Setup again.
Transfer the routing tables again.
Setup. All settings for the CPU Bus Unit have returned to
the default setting. Perform the settings again.
Bus Unit Setup error have occurred at the same time.
Take corrective actions for these three errors.
failed because the required data is not on the Memory
Cassette or the Memory Cassette is not installed.
Store the required data on the Memory Cassette and be
sure that the Memory Cassette is installed.
Section 11-2
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