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2-2SectionUnit Components
16
4, 5, 6) Indicators There are three types of LED indicators: CPU Unit status indicators, CompoBus/
S communications status indicators, and peripheral/RS-232C Port communica-
tions status indicators. These indicate the status of various Units, as shown in
the following table.
Indicator Display Status
PWR (Green)
ON Power is being supplied.
OFF Power is not being supplied.
RUN (Green)
ON In RUN mode or MONITOR mode
OFF In PROGRAM mode or fatal error has occurred.
ERR (Red)
ON Fatal error has occurred.
Flashing Non-fatal error has occurred.
OFF Normal operation
SD (Yellow)
ON CompoBus/S data is being sent.
OFF Data is not being sent.
RD (Yellow)
ON CompoBus/S data is being received.
OFF Data is not being received.
ERC (Red)
ON A CompoBus/S communications error has
occurred.
OFF Normal operation
COMM (Yellow)
Flashing Data is being sent or received at the Peripheral
Port or RS-232C Port.
OFF Data is not being sent or received.