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Reference Manual
00809-0100-4021, Rev DA
November 2004
4-23
Rosemount 3144P
FOUNDATION Fieldbus
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
AI 1500
PID 1600
ISEL 1700
CHAR 1800
ARITH 1900
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.