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Part Names and Functions Section 2-1
2-1 Part Names and Functions
2-1-1 CP1L CPU Units
(1) Battery Cover
Covers the location where the battery is stored.
(2) Operation Indicators
Show CP1L operation status.
Front Back
(1) Battery cover
(2) Operation indicators
(3) Peripheral USB port
(4) Analog adjuster
(5) External analog settings
input connector
(6) DIP switch
(8) Power supply, ground,
and input terminal block
(9) Option Board slots
(10) Input indicators
(11) Expansion I/O
Unit connector
(12) Output indicators
(7) Memory
Cassette slot
(13) External power supply,
and output terminal
block
POWER
(Green)
Lit Power is ON.
Not lit Power is OFF.
RUN
(Green)
Lit The CP1L is executing a program in either RUN or
MONITOR mode.
Not lit Operation is stopped in PROGRAM mode or due to
a fatal error.
ERR/ALM
(Red)
Lit A fatal error (including FALS execution) or a hard-
ware error (WDT error) has occurred. CP1L opera-
tion will stop and all outputs will be turned OFF.
Flashing A non-fatal error has occurred (including FAL execu-
tion). CP1L operation will continue.
Not lit Operation is normal.
INH
(Yellow)
Lit The Output OFF Bit (A500.15) has turned ON. All
outputs will be turned OFF.
Not lit Operation is normal.
PRPHL
(Yellow)
Flashing Communications (either sending or receiving) are in
progress through the peripheral USB port.
Not lit Other than the above.
BKUP
(Yellow)
Lit A user program, parameters, or Data Memory is
being written or accessed in the built-in flash mem-
ory (backup memory).
A user program, parameters, Data Memory, DM ini-
tial values, or comment memory is being written or
accessed in a Memory Cassette.
The BKUP indicator also lights while user programs,
parameters, and Data Memory are being restored
when the PLC power supply is turned ON.
Note Do not turn OFF the PLC power supply while
this indicator is lit.
Not lit Other than the above.
POWER
ERR/ALM
BKUP
RUN
INH
PRPHL
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