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CP1L CPU Unit Operation Section 2-3
Never turn OFF the power supply to the CPU Unit when the BKUP indicator is
lit.
Memory Cassette Memory Cassettes can be used as required in system operation and mainte-
nance. For example, they can be used to save programs, data memory con-
tents, PLC Setup data, or I/O comments from the CX-Programmer. The
contents of a Memory Cassette can also be automatically transferred if
desired.
Note Memory Cassette cannot be used in CP1L-J CPU Unit.