ABB 800xA Operation page 135

Section 9 Heat Exchanger Asset Monitor (HXAM)
Trend Display Tab
The Trend Display tab shows the plots of the logged properties against time. This
tab is the view of Trend Display Aspect. Three properties are logged and the user
can configure for which logged property the trend is to be displayed. Refer to
Trends and Logs
BOPS Info Tab
The BOPS Info tab
first text box in
on page 152. The second text box shows the details of the trained BOPS. Clicking
Clear all BOPS and Retrain gives the user the choice to retrain the Asset Monitor
at any time if BOPS have not been manually entered. This view also gives an
additional information that will change and dynamically vary depending on some of
the configuration parameters and running status of the Asset Monitor. These values
are internal calculations and are not available for the user to modify. This tab is a
view of the HXAM_G_BOPS_Info_FE Aspect.
A brief explanation of the additional information displayed on BOPS info tab is as
mentioned below:
Last Calculated staleness period
Last calculated staleness period is the time elapsed since a BOPS has not been
referenced by the Asset Monitor logic after comparison with COPS. If a BOPS is
not referenced by Asset Monitor for more than the staleness period, then the BOPS
set is considered to be stale and is then no longer considered for comparing with
COPS. Following formula is used for calculating staleness period.
Minimum of:
20 % of Heat Exchanger Service Interval, or
Monitoring Interval * Number of non-Stale BOPS sets.
Tolerance Band
Tolerance Band value is computed by the Asset Monitor logic in order to compare if
the COPS values fall within the range of BOPS and track the stability during
3BUA000150-600
on page 173 for more details.
(Figure 64) gives the user information on the trained BOPS. The
Figure 64 will display the same message as the text box in
HXAM_G_Faceplate
Figure 69
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