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Reference Manual
00809-0100-4021, Rev DA
November 2004
Rosemount 3144P
4-24
FOUNDATION Fieldbus
SPM#_Thresholds
The SPM#_Thresholds are used to allow alerts to be sent when the values
are beyond the threshold values that have been 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. Must be set to
“Disabled” for configuration. Only set to “Enabled” after fully configuring the
SPM.
SPM#_User Command
Select “Learn” after all the parameters have been configured to begin the
Learning Phase. The monitoring phase will start 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.