Omron CS1D DUPLEX SYSTEM - 10-2009 Operation Manual page 92

CPU Units
Indicators
56
RUN
ERR/ALM
INH BKUP
PRPHL COMM
Indicator Color Status
RUN Green ON
Flashing
OFF
ERR/ALM Red ON
Flashing
OFF
INH Yellow ON
OFF
BKUP Yellow ON
OFF
PRPHL Yellow Flashing
OFF
COMM Yellow Flashing
OFF
Meaning
CPU Unit is operating normally in MONITOR or RUN
mode.
DIP switch settings error.
PLC has stopped operating while in PROGRAM
mode, or has stopped operating due to a fatal error.
A fatal error has occurred (including FALS instruction
execution), or a hardware error (CPU error) has
occurred.
The CPU Unit will stop operating, and the outputs will
turn OFF.
A non-fatal error has occurred (including FAL instruc-
tion execution).
The CPU Unit will continue operating.
CPU Unit is operating normally.
Output OFF Bit (A50015) has been turned ON. The
outputs from all Output Units will turn OFF.
Output OFF Bit (A50015) has been turned OFF.
User program and Parameter Area data is being
backed up to flash memory in the CPU Unit or being
restored from flash memory.
Do not turn OFF the power supply to the PLC while
this indicator is lit.
Data is not being written to flash memory.
CPU Unit is communicating (sending or receiving)
via the peripheral port.
CPU Unit is not communicating via the peripheral
port.
CPU Unit is communicating (sending or receiving)
via the RS-232C port.
CPU Unit is not communicating via the RS-232C
port.
Section 2-4