Functional description
5
gas-lab
Q1
Page 59
5.3
Monitoring
module
5.3.1 Function
The
Monitoring
module basically performs the signalling and monitoring tasks of
the device:
Monitoring the gas quality measurement for errors.
The error listing serves the user to analyse and remove gas quality
measurement errors and to be able to understand the history of the course
of error.
Monitoring of any logged measurements.
Signalling of operating states.
Log-on of process value archives (archives for measurements and count
values which can be used to replace a recording instrument, for example)
Switching functionality
5.3.1.1
Monitoring the gas quality measurement and error listing
There are three different kinds of gas quality measurement errors, which are
also treated differently by the error management:
An
Alarm
is generated if a gas quality-relevant error has occurred.
Beginning and end of an alarm are entered in the associated error listing
together with a time mark (
<Alarm> begins/ends
).
If an alarm is no longer pending, i.e. it is no longer relevant, it can be
accepted at the device and thus removed from the error listing.
A
Warning
is generated if a gas quality-relevant variable is affected but
does not influence the result of the gas quality measurement. If a warning is
no longer pending, i.e. it is no longer relevant, it can be accepted at the
operator panel of the device and thus removed from the error listing.