Emerson Rosemount 3051 Manual page 111

Plugged Line
This parameter "enables" or "disables" the Plugged Impulse Line
Algorithm. Having the ADB block activated does not automatically
"enable" the Plugged Impulse Line Algorithm. The default state is
"disabled".
Affect PV Status
Determines whether the quality of the DP measurement will be
affected by the Plugged Impulse Line status. If the parameter is
"true" the following status will cause the quality of the pressure
measurement from the Sensor Transducer Block to go
UNCERTAIN.
• All Lines Plugged
• Inactive...See History
If the parameter is "false" the algorithm will detect plugged impulse
lines, but has no affect on the quality of the pressure measurement
from the Sensor Transducer Block.
Sensitivity
Determines the sensitivity of the PIL Detection Algorithm. Low
sensitivity is primarily used if the process contains large amount of
dynamics. Medium sensitivity would be recommended for normal
processes. High sensitivity would be used for a process with
minimal dynamics.
User Command
Allows the user to activate the learning phase of the PIL Detection
Algorithm. To activate the relearn "Relearn" must be selected from
the drop down list. This can be used to reinitiate the algorithm after
a plugged line has been detected. The proper measures must be
taken to clear the plug, and the process should be running normally
before relearning the process. Relearning the process may also be
necessary after changing parameters on the Adv Set window.
Block Information
C-17