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Reference Manual
00809-0200-4801, Rev BA
April 2007
Rosemount 3051S
3-26
Verify Phase
The verifying phase is similar to the learning phase. It calculates a baseline
value which is then compared to the learning phase baseline value. This is
done to ensure a steady process before the detection phase. The amount of
acceptable deviation between the two values is set up in
PLINE_Learn_Sensitivity.
Monitoring Phase
The monitoring phase starts after the learning process is complete. The
algorithm compares the current values to the baseline values of the mean and
standard deviation. During this phase the algorithm computes the percent
change in mean and standard deviation to determine if the defined limits are
violated.
SPM Configuration SPM_Bypass_Verification
If “Yes” the verification of the baseline is turned off. If “No” the learned
baseline is compared to the next current calculated value to ensure a good
baseline value. The recommended value is NO.
SPM_Monitoring_Cycle
SPM_Monitoring_Cycle is the length of time the process values are taken and
used in each calculation. A longer monitoring cycle may provide a more stable
mean value. The default is 15 minutes.
SPM#_Block_Tag
Enter the Block Tag of the function block that contains the parameter to be
monitored. Block tag must be entered, there is no pull-down menu to select
the tag. The tag must be a valid “Block Tag” that is in the device. The default
block tags from the factory are:
AI 1400 ARITH 1900
AI 1500 INTEG 2000
AI 2100 AO2700
AI 2200 AO2800
PID 1600 OSPL2600
ISEL 1700 CSEL2500
ISEL 2400 Mass Flow 2900
CHAR 1800
SPM can also monitor “out” parameters from other devices. To do this, link the
“out” parameter to an input parameter of a function block that resides in the
device, and set up SPM to monitor the input parameter.
SPM#_Block Type
Enter the Block Type of the function block that contains the parameter to be
monitored.
SPM#_Parameter Index
Enter the Parameter Index of the parameter to be monitored.
Mass Flow