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Handling Errors and Alarms Section 3-8
3-8 Handling Errors and Alarms
3-8-1 Indicators and Error Flowchart
Indicators If an alarm or error occurs in the Analog Input Unit, the ERC or ERH indica-
tors on the front panel of the Unit will light.
LED Meaning Indicator Operating status
RUN (green) Operating Lit Operating in normal mode.
Not lit Unit has stopped exchanging data with
the CPU Unit.
ERC (red) Error
detected by
Unit
Lit Alarm has occurred (such as disconnec-
tion detection) or initial settings are incor-
rect.
Not lit Operating normally.
ERH (red) Error in the
CPU Unit
Lit Error has occurred during data exchange
with the CPU Unit.
Not lit Operating normally.
ADJ (yellow) Adjusting Flashing Operating in offset/gain adjustment
mode.
Not lit Other than the above.
RUN
ERC
ERH
ADJ
Front panel of Unit
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