40
Part Names and Functions Section 2-1
Note The following data will be write-protected if pin SW1 is turned ON:
• The entire user program (all tasks)
• All data in parameter areas (such as the PLC Setup)
When SW1 is turned ON, the user program and the data in the pa-
rameter areas will not be cleared even if the All Clear operation is
performed from a Peripheral Device (i.e., the CX-Programmer).
(7) Memory Cassette Slot
Used for mounting a CP1W-ME05M Memory Cassette. When mounting
a Memory Cassette, remove the dummy cassette.
Data, such as CP1L CPU Unit programs, parameters, and data memory,
can be transferred to the Memory Cassette to be saved.
Note Memory Cassette cannot be used in CP1L-J CPU Unit.
(8) Power Supply, Ground, and Input Terminal Block
(9) Option Board Slots
The following Option Boards can be mounted in either slot 1 or slot 2.
• CP1W-CIF01 RS-232C Option Board
• CP1W-CIF11/CIF12 RS-422A/485 Option Board
• CP1W-DAM01 LCD Option Board
!Caution Always turn OFF the power supply to the PLC before mounting or removing
an Option Board.
SW2 ON Data automatically
transferred from
Memory Cassette at
startup.
Used to enable pro-
grams, Data Memory, or
parameters saved on a
Memory Cassette to be
opened by the CPU Unit
at startup.
Memory Cassette cannot
be used in CP1L-J CPU
Unit.
OFF
OFF Data not transferred.
SW3 ON A395.12 ON This pin enables control-
ling a bit in memory with-
out using an input relay.
OFF
OFF A395.12 OFF
SW4 ON Used for peripheral
bus.
Used to enable a Serial
Communications Option
Board mounted in Option
Board Slot 1 to be used
by the peripheral bus.
This SW should be
always OFF for CPU
Units with 10 I/O points,
because there is no
option slot in CPU Units
with 10 I/O points.
OFF
OFF According to PLC
Setup.
Power supply ter-
minals
Used to provide a 100- to 240-VAC or 24-VDC power
supply.
Ground terminals
Functional ground ( ):
Connect this ground to strengthen noise immunity and to
prevent electric shock.
(AC power supply models only.)
Protective ground ( ):
To prevent electric shock, ground to 100 Ω or less.
Input terminals Used to connect input devices.
No. Setting Description Application Default
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