AO2000 CONTINUOUS GAS ANALYZERS | OI/AO2000-EN REV. B 319
System status: Status signals
Overall or individual status
The status signal is factory-configured (see page 193) to output as an overall
or individual status.
Overall status
If the gas analyzer is configured to output overall status, status messages
are issued as overall status indications.
Individual status
If the gas analyzer is configured to output individual status, status messag-
es are issued as the "Failure" or "Maintenance request" or "Maintenance
mode" individual status indications.
The following table shows possible causes of individual status signals and
how to evaluate the values measured.
Individual status
signal
Cause Evaluation of measured
value
Failure The analyzer is in a state
that requires immediate
user intervention.
The measured value is
invalid.
Maintenance request The analyzer is in a state
that will soon require user
intervention.
The measured value is
valid.
Maintenance mode The gas analyzer is being
calibrated or serviced.
The measured value is
not a process measured
value and is to be dis-
carded.
Individual status by analyzer module or sample component
In principle, the individual status signals apply to the entire gas analyzer
(system status).
However, by configuring the Message input function block, individual status
messages for each analyzer module or for each sample component can be
output separately via digital outputs. The Technical Information "Function
Blocks – Descriptions and configuration" contains complete information on
the individual function blocks.
I/O device status messages are only reported as system status signals.
Status indication
Gas analyzer status is indicated by means of status LEDs.
LED Status
Error
Overall status or individual "Error" status
Maint
Individual "Maintenance request" status
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