15
1, 2, 3... 1. Indicators
The indicators (LEDs) on the front cover of the CPU Unit operate as
described in the following table.
LED Contents
RUN (green) Lights when the PC is operating normally in MONITOR
or RUN mode.
ERR (red) Flashes if an error occurs that does not stop the CPU
Unit (a non-fatal error).
Lights if an error occurs that stops the CPU Unit (a fatal
error). If a fatal error occurs, the RUN indicator will turn
OFF and the outputs from all Output Units will turn OFF.
INH (orange) Lights when the Load OFF Bit (SR 25215) turns ON. If
the Load OFF Bit is turned ON, the outputs from all
Output Units will turn OFF.
COMM (orange) Lights when the CPU Unit is communicating via the
peripheral or RS-232C port.
2. Memory Casette Compartment
The Memory Cassette compartment contains the built-in RAM and can be
used to mount an optional Memory Cassette. Refer to 3-1-8 Mounting
Memory Cassettes for the mounting methods.
Units
Section 2-2
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