Error Classification And Confirmation - Omron CP1L Operation Manual

Error Classification and Confirmation

10-1 Error Classification and Confirmation
Error Categories
Confirming Errors
CPU Unit Indicators
POWER
ERR/ALM
PRPHL
BKUP
560
Errors in CP1L CPU Units can be broadly divided into the following four cate-
gories.
Category
CPU Error
CPU Standby
Fatal Error
Non-fatal Error
There are three sources of information on errors that have occurred.
• CPU Unit indicators
• Auxiliary Area
These indicators show the operating status of the CPU Unit.
POWER
(green)
RUN (green)
RUN
ERR/ALM
INH
(red)
INH (yellow)
PRPHL
(yellow)
BKUP
(yellow)
(See note.)
Note Do not turn OFF the CPU Unit power supply when this indicator is lit.
A WDT (watchdog timer) error is generated in the CPU Unit, the
CPU Unit will malfunction, and operation will stop.
The CPU will go on standby because conditions for stating oper-
ation have not yet been met.
Operation cannot continue. Operation will stop due to a serious
problem.
A minor problem has occurred. Operation will continue
Lit Power is ON.
Not lit Power is OFF.
Lit The CPU Unit is executing a program in either RUN or
MONITOR mode.
Not lit Operation is stopped in PROGRAM mode or due to a
fatal error.
Lit A fatal error or CPU error (WDT error) has occurred.
operation will stop and all outputs will be turned OFF.
Flashing A non-fatal error has occurred. Operation will continue.
Not lit Operation is normal.
Lit The Output OFF Bit (A500.15) was turned ON. All out-
puts will be turned OFF.
Not lit Operation is normal.
Flashing Communications (either sending or receiving) are in
progress through the peripheral port.
Not lit Other than the above.
Lit • The user program, parameters, or DM Area
data is being written to or accessed in the
built-in flash memory (backup memory).
• The user program, parameters, DM Area data,
or DM initial values are being written to or
accessed in a Memory Cassette.
• The BKUP indicator also lights while the user
program is being restored when the power
supply is turned ON.
Not lit Other than the above.
Section 10-1
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