Flowserve Logix MD+ ValveSight - Manual (Page 138)

ValveSight™ Diagnostics DTM Manual for Logix MD+ Positioner with HART®
FCD- LGENSF0014-00
© Flowserve Corporation
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Trends
The Trends page displays a graph showing data gathered by the positioner over a long
period of time. When this page is first loaded, it will automatically download the trend data
from the positioner memory. The data includes values from several important system
parameters. Viewing these trends can help detect issues that may affect the control of the
valve and become worse over time. The trends are stored with 4 levels of resolution.
1. The 36 hour graph shows the average of each measured value by hour for
the last 36 hours.
2. The 30 days graph shows the average of each measured value by day for
the last 30 days.
3. The 12 months graph shows the average of each measured value by month
for the last 12 months.
4. The 15 years graph shows the average of each measured value by year for
up to 15 years.
Status Area
The Active Indicator area shows the status of the most relevant active indicator. The color
of the "LED light" corresponds to the Active Indicator and the first color of the blink code
sequence on the positioner. Generally green indicates no immediate issues. Yellow
indicates a developing issue. Red indicates the ability to control may be compromised. A
detailed list of the indicators is given in the
Alarm Congfiguraion - Alarm Annunicator page.
The Command Source field indicates weather the positioner is being controlled by digital or
an analog (4-20 mA) command source.