Error Classification And Confirmation - Omron CP1H-CPU - 05-2006 Operation Manual

Error Classification and Confirmation

9-1 Error Classification and Confirmation
Error Categories
Confirming Errors
CPU Unit Indicators
POWER RUN
ERR/ALM INH
BKUP PRPHL
460
Errors in CP1H 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
• Seven-segment display
• Auxiliary Area
These indicators show the operating status of the CPU Unit.
POWER Lit
(green)
Not lit
RUN (green) Lit
Not lit
ERR/ALM Lit
(red)
Flashing
Not lit
INH (yellow) Lit
Not lit
BKUP Lit
(yellow)
(See note.)
Not lit
PRPHL Flashing
(yellow)
Not lit
Note Do not turn OFF the CPU Unit power supply when this indicator is lit.
Comments
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
Power is ON.
Power is OFF.
The CPU Unit is executing a program in either RUN or
MONITOR mode.
Operation is stopped in PROGRAM mode or due to a
fatal error.
A fatal error or CPU error (WDT error) has occurred.
operation will stop and all outputs will be turned OFF.
A non-fatal error has occurred. Operation will continue.
Operation is normal.
The Output OFF Bit (A500.15) was turned ON. All out-
puts will be turned OFF.
Operation is normal.
The built-in flash memory is being written to or the
Memory Cassette is being accessed.
The BKUP indicator also lights while the user program
is being restored when the power supply is turned ON.
Other than the above.
Communications (either sending or receiving) are in
progress through the peripheral port.
Other than the above.
Section 9-1