Reference Manual
00809-0100-4021, Rev FB
August 2011
Rosemount 3144P
4-28
FOUNDATION Fieldbus
SPM#_Thresholds
The SPM#_Thresholds allow alerts to be sent when the values are beyond
the threshold values that set for each parameter.
Mean Limit
Alert Limit value in percent change of the Mean compared with the
baseline mean value.
High Variation
Alert Limit value in percent change of the Stdev compared with the
baseline Stdev value.
Low Dynamics
Alert Limit value in percent change of the Stdev compared with the
baseline Stdev value.
SPM_Active
SPM_Active parameter that starts the Statistical Process Monitoring when
“Enabled”. “Disabled” turns the diagnostic monitoring off. It must be set to
“Disabled” for configuration, and only set to “Enabled” after fully configuring
the SPM.
SPM#_User Command
Select “Learn” after all of the parameters have been configured to begin the
Learning Phase. The monitoring phase starts after the learning process is
complete. Select “Quit” to stop the SPM. “Detect” may be selected to return to
the monitoring phase.
Baseline Values
The Baseline Values are the calculated values from the process over the
Learning Cycle.
SPM#_Baseline_Mean
SPM#_Baseline_Mean is the calculated average of the process variable
over the Learning Cycle.
SPM#_Baseline_Standard_Deviation
SPM#_Baseline_Standard_Deviation is the square root of the variance of
the process variable over the Learning Cycle.
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