Technical Note
00840-1300-4801, Rev AA
April 2013
Advanced Diagnostics
Rosemount 3051S Advanced Diagnostics
Module Templates for DeltaV
Graphics Files
ROSEMOUNT STATISTICAL PROCESS
MONITORING (SPM) MODULE
TEMPLATES FOR DELTAV.
The Rosemount Statistical Process Monitoring Library
Module Templates for DeltaV® versions 11 and later,
provide a means to easily configure alarms, process
history collection, and operator faceplates for
Rosemount field devices that implement Statistical
Process Monitoring (SPM) technology. There are two
module templates that support SPM technology. The
RMT_SPM_HART template is used for HART®
devices that implement SPM Technology (e.g.
Rosemount 3051S with Advanced HART
Diagnostics), while the RMT_SPM_FF template is
used for FOUNDATION™ Fieldbus devices that
implement SPM (e.g. Rosemount 3051S FF with
Advanced Diagnostics Suite). SPM data (PV, Mean,
Standard Deviation, and Coefficient of Variation)
generated by the field device are brought into Control
Studio via AI Function Blocks. The Module Templates
provide pre-configured, history collection, alarms, and
alarm management.
The DeltaV Module Templates can be downloaded at:
http://www.Rosemount.com/3051SDiagnostics
The following files are included in the DeltaV Module
Templates:
DeltaV Import/Export Configuration Files (e.g. FHX
Files)
•
Spm_vars – Contains the Named Set
“spm_vars” used by both RMT_SPM_HART
and RMT_SPM_FF
•
RMT_SPM_HART – Used for HART Devices
with SPM
•
RMT_SPM_FF – Used for Fieldbus devices
with SPM
www.rosemount.com
•
RMT_SPM_fp – Operator Faceplate Picture
used by both RMT_SPM_HART and
RMT_SPM_FF
•
RMT_SPM_dt – Operator Detail Picture used
by both module templates
Chart Files – Used to create the Process History View
charts launched from the Faceplate
•
RMT_SPM_FF_MC
•
RMT_SPM_FF_MS
•
RMT_SPM_FF_PC
•
RMT_SPM_FF_PS
•
RMT_SPM_HART_MC
•
RMT_SPM_HART_MS
•
RMT_SPM_HART_PC
•
RMT_SPM_HART_PS
Instructions for Installing Module
Templates
The following instructions explain how to import the
Rosemount 3051S Advanced Diagnostics DeltaV
Library Module Templates (with associated charts and
pictures) into a DeltaV 11 system. These templates
will be pre-installed with DeltaV versions 12 and later.
Import Module Template Configuration Files
From DeltaV Explorer, select the menu option File >
Import > Standard DeltaV Format to import the
Module Template Configuration Files. Import the three
files in the FHX folder. First import the file
spm_vars.fhx. Second, import the files
RMT_SPM_HART.fhx and RMT_SPM_FF.fhx.
Import Process History View Chart Files
Copy the following 8 files from the Charts folder to the
directory: C:\DeltaV\DVData\Charts\lib
Technical Note
00840-1300-4801, Rev AA
April 2013
Advanced Diagnostics
RMT_SPM_FF_MC.phve
RMT_SPM_FF_MS.phve
RMT_SPM_FF_PC.phve
RMT_SPM_FF_PS.phve
RMT_SPM_HART_MC.phve
RMT_SPM_HART_MS.phve
RMT_SPM_HART_PC.phve
RMT_SPM_HART_PS.phve
Import the Picture Files
Copy the file RMT_SPM_fp.grf from the Pic folder to
the directory
C:\DeltaV\DVData\Graphics-iFix\Pic\Faceplate
Copy the file RMT_SPM_dt.grf from the Pic folder to
the directory
C:\DeltaV\DVData\Graphics-iFix\Pic\Detail
STATISTICAL PROCESS MONITORING
TECHNOLOGY
Advanced Pressure Diagnostics technology provides
a means for early detection of abnormal situations in
a process environment. Advanced Diagnostics
technology enables the user to proactively respond
to changes in the process, troubleshoot, and prevent
loss of production, plant shut-downs or safety
hazards.
Virtually all dynamic processes have a unique noise
or variation signature when operating normally.
Changes in the signatures may signal that an
abnormal event has occurred or will occur soon.
Examples of abnormal events that are detectable
using process variation include plugged impulse
lines, furnace flame instability, distillation column
flooding, pump cavitation, and entrained gas in liquid
flow measurements.
Since pressure measurement applications require a
very stable reading, damping is typically applied to
both the transmitter and the host system to reduce or
eliminate variation. Control systems typically sample
the pressure once per second or slower. The
combination of damping and sample rate remove
most of the signal variation characteristics that are
useful for detecting abnormal process conditions.
Statistical Process Monitoring (SPM) technology
provides a solution by sampling the pressure at a
rate faster than available in the control system,
computing statistical parameters (e.g. mean,
standard deviation, and coefficient of variation), and
making these parameters available to a host system
via HART or FOUNDATION Fieldbus. Figure 1 shows
one example of how the Standard Deviation value is
affected by changes in Process Noise while the
Process Variable (PV), as typically seen by the
control system, remains unchanged.
Figure 1. Example of how Standard Deviation changes with
the process noise
55
Process
Noise
Normal
Increased Noise Reduced Noise
50
45
0
1
1.5
Standard 1
Deviation
0.5
2
0
0
1
2
4
Standard
Deviation
Decreases
Standard
Deviation
Decreases
3
4
55
Process
Variable
(PV)
PV Unchanged
50
PV Unchanged
45
0
1
2
3
Time (minutes)
4
Figure 2 illustrates SPM technology in greater detail.
The process pressure is measured by the pressure
sensor, and sent to the host system via 4-20 mA. At
the same time, a Statistical Calculations Module
computes the mean, standard deviation, and
coefficient of variation (CV).
Figure 2. Illustration of how the SPM technology works.
Standard Outputs
(4-20 mA/HART
Learning
Module
Process
Variable
Control Inputs
Baseline
Values
Statistical
Calculations
Module
Decision
Module
Resident in Transmitter
2
3
Statistical Parameters
HART alert /
4-20 mA alarm
Outputs
Technical Note
00840-1300-4801, Rev AA
April 2013
Advanced Diagnostics
The Statistical Parameters (or SPM variables) are
made available as outputs to the host system as
HART or FOUNDATION Fieldbus digital variables,
where they may be trended in a process historian
and viewed by a plant operator. If a process upset
occurs, plant staff can look at the process historian
and examine the SPM variables to determine if
changes in these values gave any prior indication.
After understanding how changes in process
conditions change the SPM variable values, a control
engineer can create alarms based on the SPM data.
The SPM data can also be integrated with plant
operations to provide an early indication of abnormal
process conditions and facilitate faster recovery or
the prevention of the abnormal condition.
As of November 2012, the following pressure
transmitters implement Statistical Process Monitoring
technology and are compatible with these module
templates.
Manufacturer Protocol
Device Revision
SPM
Type
(s)
Description Variables
Rosemount
HART
3051S
HDT
1, 2
Rosemount
HART
3051S
HDT
3
Rosemount
FF
3051
23
3051S
Advanced
HART
Diagnostics
– DA1
Option
3051S
Advanced
HART
Diagnostics
– DA2
Option
3051S
FOUNDATION
Fieldbus
with
Advanced
Diagnostics
Suite (D01
Option)
Mean,
Std Dev
Field test and laboratory data have shown that for
most DP flow applications, the standard deviation is
approximately proportionate to the DP mean. This
relationship has been observed in a variety of fluids
(e.g. liquid and gas), primary elements (orifice plate,
venturi, flow nozzle, Annubar, etc.) and beta ratios.
The ratio of standard deviation to mean is defined as
the Coefficient of Variation (CV).
CV = (StDev/Mean) x 100%
CV will remain approximately constant even if the
flow rate changes. Thus, if an operator observes a
change in CV, it is much less likely due to a change
in the flow rate, and much more likely due to the
presence of some abnormal process condition.
Figure 3 on page 4 shows a comparison of standard
deviation with CV. During the abnormal event, (e.g.
plugged impulse line, entrained air, etc.) both the
standard deviation and the CV increase. But when
the flow rate is increased, the standard deviation
increases while the CV stays generally constant.
Mean,
Std Dev,
CV
Mean,
Std Dev
COEFFICIENT OF VARIATION
In DP flow applications, the standard deviation is
affected by the differential pressure. Thus, if the flow
rate increases, the standard deviation also
increases. If the flow decreases, the standard
deviation decreases. A change in standard deviation
caused by a changing flow rate should not be
interpreted as an abnormal event.
3
Technical Note
Advanced Diagnostics
00840-1300-4801, Rev AA
April 2013
Figure 3. Comparison of the Coefficient of Variation and Standard Deviation variables under varying flow conditions.
CV is recommended to be used only with DP flow
applications, because for other pressure applications
(e.g. line, absolute, DP level) the relationship of
standard deviation being proportionate to pressure
does not hold.
NOTE
In the 3051S Advanced HART Diagnostics with DA2
option the Mean, Standard Deviation, and Coefficient
of Variation are available directly from the transmitter
as HART digital variables. In the 3051S HART DA1
and 3051S FF D01, only Mean and Standard
Deviation are available. If needed, CV can be
calculated in Control Studio as described in
“Operation of the Module Templates.”
4
Technical Note
00840-1300-4801, Rev AA
April 2013
EXAMPLE APPLICATIONS FOR SPM
TECHNOLOGY
Some example applications for SPM technology are
listed below. SPM technology may also be
appropriate for applications not listed. For more
information on SPM applications, refer to:
www.Rosemount.com/3051Sdiagnostics
•
Plugged Impulse Lines
•
Furnace Flame Instability
•
Distillation Column Flooding
•
Pump or Valve Cavitation
•
Wet Gas Flow
•
Catalyst Circulation Problems
•
Coal Pulverizer Primary Fan Wear
•
Coated or Plugged Annubar
•
Pulsation Induced Measurement Error
•
Aerated Liquid Flow
•
Agitation Loss in DP Level
•
Bubbler Tank Level
•
Process Leak
NOTE
SPM diagnostic capability in the pressure transmitter
calculates and detects significant changes in
statistical parameters derived from the input pressure
signal. These statistical parameters relate to the
variability of and the noise signals present in the
pressure signal. It is difficult to predict specifically
which noise sources may be present in a given
pressure measurement application, the specific
influence of those noise sources on the statistical
parameters, and the expected changes in the noise
sources at any time. Therefore, Emerson Process
Management cannot absolutely warrant or guarantee
that SPM will accurately detect each specific
condition under all circumstances.
Advanced Diagnostics
1. A CALC block with code for Alarm Management
and Calculating Coefficient of Variation when
needed
2. AI Function Blocks for reading PV, Mean, and
Standard Deviation from the field device
3. AI Function Block for Coefficient of Variation
(either read from the field device, or populated
by the CALC block)
4. Device Tag parameter to allow the AMS Device
Dashboard to be launched from the Operator
Faceplate
5. Alarm Management parameters, allowing the
SPM alarms to be automatically enabled and
disabled during known periods (such as during
a process startup or shutdown), or when the
process goes outside of a known valid operating
range.
6. Parameters for specifying SPM variables to be
displayed to the Operator on the Faceplate and
Process History View charts.
The module template also provides preconfigured
history collection for each of the AI blocks (PV,
HI_LIM, and LO_LIM parameters). Preconfigured HI
and LO alarms are provided for each AI block.
Each of these components of the module template is
described in detail later on.
DIAGNOSTIC MODULE TEMPLATE
OVERVIEW
The pre-configured Advanced Diagnostics module
templates provide the means for the user to easily
utilize Rosemount advanced pressure diagnostics.
Figure 4 on page 6 shows a screen capture of the
RMT_SPM_HART module template. The module
template contains six main components:
5
Technical Note
00840-1300-4801, Rev AA
April 2013
Advanced Diagnostics
Figure 4. Screenshot of the HART SPM Module Templates in Control Studio
(1)
(2)
(3)
(4)
(5)
(6)
6
Technical Note
00840-1300-4801, Rev AA
April 2013
CONFIGURATION
To configure Statistical Process Monitoring using the
DeltaV Explorer, create a module from the module
template RMT_SPM_FF for Fieldbus devices or
RMT_SPM_HART for HART devices. You can use
DeltaV Explorer or Control Studio to customize the
module’s properties and configuration parameters.
There are configuration tips in the function block
diagram of the module in Control Studio. Begin by
assigning the ‘AI1’, ‘MEAN’, and ‘STDEV’ function
blocks to the Signal Tag for the corresponding
variable from the transmitter. If available in the device
also assign the ‘CV’ function block, and change the
CV_ASSIGNED parameter to TRUE. If CV is not
available in the device, then leave the CV function
block and CV_ASSIGNED parameter unchanged,
and the CALC block will automatically calculate CV
from the mean and standard deviation.
Next you will need to set the scaling for both the AI
and/or ALM function blocks as desired. The scaling
limits will automatically propagate into both the
Operator Faceplate and the Process History View
Chart. In RMT_SPM_HART the OUT_SCALE
parameters of the AI blocks are used for the
faceplate and charts. In RMT_SPM_FF the
IN_SCALE parameters of the ALM blocks are used
for the faceplate and charts. Modify the history
collection parameters as desired.
Enable SPM Alarms and set alarm limits as desired.
Note that all of the SPM Alarms are disabled by
default. It is recommended that prior to enabling
alarms the user monitors the SPM data to determine
how it is affected by an abnormal condition.
Set the DEVICE_TAG parameter to the DeltaV tag
for the device. Configure the alarm management
(ALARMS_ENABLED and PV_LIM_MODE) as
desired.
OPERATION OF THE MODULE
TEMPLATES
SPM variables (Mean, Standard Deviation, and CV)
are available from the pressure transmitter as either
HART digital variables (HART_SV, HART_TV, and
HART_FV) or as FOUNDATION Fieldbus variables.
Refer to the device documentation for information on
mapping the SPM variables to HART or Fieldbus
variables.
Advanced Diagnostics
With the SPM module templates, PV, mean and
standard deviation values are monitored using 3 AI
blocks (AI1, MEAN, and STDEV). The coefficient of
variation is monitored using a 4th AI block (CV).
Some pressure transmitters provide CV directly as a
secondary variable. For other pressure transmitters,
CV is calculated from the mean and standard
deviation by logic in the CALC block of the module
template, and written to the CV AI Block via the
SIMULATE parameter. The Boolean parameter
CV_ASSIGNED is used to specify whether the CV is
read directly from the transmitter (TRUE) or whether
CV is calculated in the CALC block (FALSE).
ALARM LIMITS AND ALARM
MANAGEMENT
There are 11 alarms provided by the module. All
alarms are disabled by default except the
PVBAD_ALM. The alarm limits and priorities can be
modified, and alarms can be enabled or disabled
individually in either the AI Block (RMT_SPM_HART)
or the Alarm Block (RMT_SPM_FF). Default alarm
limits, priorities, and enabled states are shown below.
Alarm
Parameter
Limit
Value Enabled
Priority
CV_HI
CV/HI_ACT
1
False
Advisory
CV_LO
HI_ALM
HI_HI_ALM
LO_ALM
LO_LO_ALM
MEAN_HI
MEAN_LO
PVBAD_ALM
CV/LO_ACT
AI1/HI_ACT
AI1/HI_HI_ACT
AI1/LO_ACT
AI1/LO_LO_ACT
MEAN/HI_ACT
MEAN/LO_ACT
AI1/BAD_ACTIV
E
STDEV/HI_ACT
STDEV/LO_ACT
0
95
100
5
0
95
5
False
False
False
False
False
False
False
True
Advisory
Warning
Critical
Warning
Critical
Log
Log
Critical
1
0
False
False
Advisory
Advisory
STDEV_HI
STDEV_LO
Typically alarms are left disabled and the SPM data
is logged into the process historian for a period of
time. Alarm limits are adjusted, and alarms are
enabled, after operating experience determines the
threshold of transition from normal to abnormal
process conditions.
7
Technical Note
00840-1300-4801, Rev AA
April 2013
Advanced Diagnostics
DYNAMIC ENABLING AND DISABLING
OF ALARMS
Situations may exist where the monitored point is
deliberately being operated outside its normal
operating range, or the process may be starting up or
shutting down, or the process may be transitioning
from one operating regime to another. During those
times it may be desirable to disable alarms so
operators don’t experience nuisance alarms. The
CALC block has logic for dynamically enabling and
disabling alarms at run-time. The logic does this by
changing the HI_ENAB and LO_ENAB parameters of
the AI blocks (RMT_SPM_HART) or the Alarm
blocks (RMT_SPM_FF). There are two separate
criteria used to enable and disable alarms. One is by
an external reference, and the other is by operating
the process outside configured PV or Mean limits.
Both are described below.
Alarm Management by external reference
The ALARMS_ENABLED configuration parameter in
the template is used to link the control module to an
external reference used to toggle the SPM alarms
between the enabled and the disabled states. The
value of this external reference can be modified by a
process parameter, or by an operator action. The
external reference is generally a logic statement in
another control module. A logic result of “0” disables
alarms. A logic result of “1” enables alarms. A single
external reference can be used to enable or disable
the alarms from a single or multiple instances of SPM
modules. Refer to Figure 5 on page 8 for a flowchart
of the Alarm Management logic.
The ALARMS_ENABLED configuration parameter
enables and disables the HI and LO alarms of all AI
Blocks (PV, MEAN, STDEV, CV). The parameter
does NOT enable or disable PV HIHI (HI_HI_ALM),
PV LOLO (LO_LO_ALM), or PV_BAD alarms.
Figure 5. Flowchart of the Alarm Management logic.
Enable
Disable
PV Alarms
AI1 PV
Enable
Disable
Mean Alarms
Remote
Parameter
AI2 Mean
ALARMS ENABLED
CALC
Enable
Disable
StDev Alarms
AI3 StDev
Enable
Disable
CV Alarms
AI4 CV
8
Alarm Management by PV or Mean
When PV_LIM_MODE is set to True, the CALC block
disables and enables StDev or CV alarms based on
the PV or MEAN (whichever is selected in
FP_VAR_1) exceeding the HI or LO limit. This logic
is illustrated in Figure 6. When PV_LIM_MODE is set
to False, the StDev and CV alarms are always
enabled.
Figure 6. Flowchart of Alarm Management through
PV/Mean.
PV
LO_LIM ≤
PV ≤HI_LIM
Mean
FP_VAR_1
Yes
LO_LIM ≤
MEAN ≤HI_LIM
No
No
Disable STDEV
and CV HI and LO
Alarms
Yes
Enable STDEV
and CV HI and LO
Alarms
OPERATOR FACEPLATE LAUNCHING
OF AMS DEVICE MANAGER
The DEVICE_TAG configuration parameter is used
to enable the operator to open the AMS™ Device
Manager screen from the operator faceplate. The
DEVICE_TAG parameter must be set to the DeltaV
tag (that is, the device tag shown in DeltaV Explorer)
of the device with SPM.
FACEPLATE VARIABLES
The RMT_SPM_fp operator faceplate can display
two variables. The first variable (left side of
faceplate), can be configured as PV or Mean via
FP_VAR_1. The second variable (right side of
faceplate), can be configured as StDev or CV via
FP_VAR_2. The variables selected to be shown on
the faceplate are the same variables that are shown
in the Process History View chart when launched
from the faceplate. See “Operator Faceplate
(RMT_SPM_fp)” on page 13 for additional
information on the Operator Faceplate.
Technical Note
00840-1300-4801, Rev AA
April 2013
Advanced Diagnostics
THEORY OF OPERATION –
FOUNDATION FIELDBUS ONLY
The RMT_SPM_FF module template, designed for
FOUNDATION Fieldbus SPM devices, operates with a
few differences from the HART modules. Refer to
Figure 7 for a screen capture of the Fieldbus Module
Template. The AI Blocks (AI1, MEAN, and STDEV)
are configured as Fieldbus shadow function blocks
(1). These blocks are pre-configured to CHANNEL
values of 1, 12, and 13 respectively, which
correspond to the PV, Mean, and Standard Deviation
in the 3051S FF Rev 23. The CV AI Block (3) is not a
Fieldbus shadow block.
Each AI block has a corresponding Alarm Detection
(ALM) block (2 and 4). The 3051S Rev 23 Fieldbus
SPM (D01) does not provide the CV parameter, so
the variable is calculated by code in the CALC block
(5) as the ratio of Standard Deviation to Mean.
9
Technical Note
00840-1300-4801, Rev AA
April 2013
Advanced Diagnostics
Figure 7. Screenshot of the Fieldbus SPM Module Templates in Control Studio
(5)
(1)
(2)
(3)
10
(4)
Technical Note
00840-1300-4801, Rev AA
April 2013
Advanced Diagnostics
See flowchart in Figure 8 for how the SPM data
passes from the AI blocks to the Alarm blocks. The
CALC block copies the value and status of the OUT
parameter of each AI block to the IN parameter of the
corresponding ALM block. The ALM block is used to
generate the alarms rather than the AI block,
because the Alarms are dynamically enabled and
disabled. Writing directly to the HI_ENAB or
LO_ENAB parameters of a Fieldbus function block
would require writing to Non-Volatile parameters of a
Field Device, and cause Control Studio to give a
warning message. This situation is avoided by using
the ALM block for alarms.
The value and status from the AI blocks are copied to
the ALM blocks using code in the CALC block, rather
than using links. This allows the SPM data to be
brought into the controller during Unscheduled
Fieldbus communication time, rather than during
scheduled communication. This reduces the load on
the Fieldbus segment and gives the minimum effect
on the segment macro-cycle.
FUNCTION BLOCKS AND
CONFIGURATION PARAMETERS
Function Blocks in RMT_SPM_HART
Function
Block
AI1
MEAN
Analog Input block for the
Standard Deviation –
assigned to HART_SV,
HART_TV, or HART_FV
CV
Analog Input block for the
Coefficient of Variation –
may either be assigned to
HART_SV, HART_TV, and
HART_FV (on support
devices) or calculated in
DeltaV and updated via
SIMULATE parameter.
CALC block containing logic
to calculate Coefficient of
Variation, and
enable/disable alarms.
PV
AI1 PV
ALM PV
Mean
Mean
AI2 Mean
ALM Mean
CV_ALAR
M_CTRL
CV
CALC
AL4 CV
ALM CV
Analog Input block for the
Primary Variable – usually
assigned to
FIELD_VAL_PCT,
HART_FIELD_VAL, or
HART_PV
Analog Input block for the
Mean – assigned to
HART_SV, HART_TV, or
HART_FV
STDEV
Figure 8. Flowchart of SPM Variables in the Foundation
Fieldbus template
PV
Description
Default Scaling
XD_SCALE = 0.0 to
100.0%
OUT_SCALE = 0.0 to
100.0 no units
L_TYPE = Indirect
XD_SCALE = 0.0 to
100.0 inH2O
OUT_SCALE = 0.0 to
100.0 inH2O
L_TYPE = Indirect
XD_SCALE = 0.000 to
1.000 inH2O
OUT_SCALE = 0.000
to 1.000 inH2O
L_TYPE = Indirect
XD_SCALE = 0.000 to
1.000%
OUT_SCALE = 0.000
to 1.000%
L_TYPE = Indirect
N/A
StDev
StDev
AI3 StDev
ALM StDev
11
Technical Note
00840-1300-4801, Rev AA
April 2013
Advanced Diagnostics
Function Blocks in RMT_SPM_FF
Function Block
AI1
MEAN
Description
Fieldbus Shadow
Analog Input block for
the Primary Variable
–
Fieldbus Shadow
Analog Input block for
the Mean
STDEV
Fieldbus Shadow
Analog Input block for
the Standard
Deviation
CV
Analog Input block for
the Coefficient of
Variation – calculated
in DeltaV and
updated via
SIMULATE
parameter.
CALC block
containing logic to
calculate Coefficient
of Variation, and
enable/disable
alarms.
Alarm Detection block
for generating alarms
based on Primary
Variable
Alarm Detection block
for generating alarms
based on Mean
Alarm Detection block
for generating alarms
based on Standard
Deviation
Alarm Detection block
for generating alarms
based on Coefficient
of Variation
CV_ALARM_CTRL
ALM_AI1
ALM_MEAN
ALM_STDEV
ALM_CV
Default Channel and/or
Scaling
CHANNEL=1
XD_SCALE = 0.0 to
100.0 inH2O (68º F)
OUT_SCALE = 0.0 to
100.0 inH2O
L_TYPE = Indirect
CHANNEL=12
XD_SCALE = 0.0 to
100.0 inH2O (68º F)
OUT_SCALE = 0.0 to
100.0 inH2O
L_TYPE = Indirect
CHANNEL=13
XD_SCALE = 0.000 to
1.000 inH2O (68º F)
OUT_SCALE = 0.000
to 1.000 inH2O
L_TYPE = Indirect
XD_SCALE = 0.000 to
1.000%
OUT_SCALE = 0.000
to 1.000%
L_TYPE = Indirect
N/A
IN_SCALE = 0.0 to
100.0 inH2O
Module Configuration Parameters
Applies to both RMT_SPM_HART and
RMT_SPM_FF modules
Parameter
CV_ASSIGNED
DEVICE_TAG
ALARMS_ENABLED
PV_LIM_MODE
FP_VAR_1
FP_VAR_2
Description
Differentiates whether the CV value is
read from the transmitter or calculated
in the Controller. Set to TRUE if the
IO_IN parameter of the CV function
block is configured.
Specifies the DeltaV tag for the device,
which is used by the faceplate to launch
AMS Device Manager
Enables/Disables all HI and LO alarms
in the Control Module. Change this
parameter to an External Reference,
and link it to another control module
containing the logic to enable and
disable alarms.
If set to TRUE, the STDEV and CV
Alarms are disabled if the MEAN or PV
(as determined by FP_VAR_1) go
outside of the HI or LO limits.
Configures the first variable for both the
Process History View and the Operator
Faceplate (PV or MEAN).
Configures the second variable for both
the Process History View and the
Operator Faceplate (STDEV or CV).
The faceplate and detail display picture names are
pre-defined as module properties. For more
information on the faceplate and detail display, refer
to the corresponding help sections:
“Operator Faceplate (RMT_SPM_fp)” on page 13
IN_SCALE = 0.0 to
100.0 inH2O
IN_SCALE = 0.000 to
1.000 inH2O
IN_SCALE = 0.000 to
1.000%
“Operator Detail Display (RMT_SPM_dt)” on page 15
DELETING FUNCTION BLOCKS
In some instances, it may be desirable to delete one
or more of the function blocks from the control
module. For example, if the PV is being used in a
different control module (such as in a PID control
module), then you may want to delete the PV
function block from the SPM module. As another
example, if the pressure transmitter is being used in
a gauge pressure application, it may not be
necessary to monitor the CV. You may delete any of
the function blocks that are not needed.
After deleting unneeded function blocks, you must
also do the following:
12
Technical Note
00840-1300-4801, Rev AA
April 2013
1. Delete any alarms referencing the deleted
function block(s).
Advanced Diagnostics
Figure 9. DeltaV Operate View of the Statistical Process
Monitoring Faceplate (RMT_SPM_FP)
2. Modify the code in the CALC block. Right-click
on the CALC block, and select Expression…
from the context menu. Follow the instructions
in the code comments to delete sections of the
code that reference the deleted function
block(s).
NOTE
To use the operator faceplate with the control
module, you must at a minimum keep either the AI1
or MEAN function blocks, and either the STDEV or
CV function blocks.
NOTE
If any function blocks are deleted, the operator detail
display will recognize this and automatically make
the corresponding fields invisible.
OPERATOR FACEPLATE
(RMT_SPM_FP)
The RMT_SPM_FP faceplate is used with the
RMT_SPM_HART and RMT_SPM_FF library
module templates. The faceplate shows the values
and bar graphs for two different AI function block
variables. The left bar graph is the value of either the
PV or the MEAN function block, as determined by the
FP_VAR_1 (Left Operator Variable) parameter in the
control module. The right bar graph is the value of
either the STDEV or the CV function block, as
determined by the FP_VAR_2 (Right Operator
Variable) parameter. If either the FP_VAR_1 or
FP_VAR_2 parameter are changed to display a
different variable, the faceplate must be closed, and
reopened, in order to display the newly assigned
variable on the bar graph.
Transmitter
Tag
Standard
Deviation
PV
PV Units
PV EU 100
High High
PV Alarm
Limit
High PV
Alarm Limit
Low PV
Alarm Limit
Low Low PV
Alarm Limit
PV EU 0
Standard
Deviation
units
Standard
Deviation
EU 100
High
Standard
Deviation
Limit
Tick Marks
Low
Standard
Deviation
Limit
Standard
Deviation
EU 0
Alarm
Indicators
Unit Field
Detail Display
Button
Primary
Acknowledge
Launch Control Process
Control
Studio History View Alarms
AMS
Display
button
Button Button Button
Button
The following items are contained in the faceplate:
•
Transmitter Tag – Tag of the transmitter
providing SPM data to this module. This tag
must be specified in the DEVICE_TAG
parameter of the module.
•
PV – This field displays the OUT value from
either the PV or the MEAN function block, as
specified in the FP_VAR_1 parameter. The
background color of the 3-D box changes from
gray to orange or red when the PV status
becomes uncertain or bad, respectively. The
PV or MEAN value is visible in the decimal
format provided by OUT_SCALE.DECPT.
13
Technical Note
00840-1300-4801, Rev AA
April 2013
Advanced Diagnostics
•
PV Units – This area provides the engineering
units description used for the PV or MEAN as
defined in the OUT_SCALE parameter.
•
PV EU 100 – This value corresponds to 100%
of scale for the PV (or MEAN).
•
PV EU 0 – This value corresponds to 0% of
scale for the PV (or MEAN).
•
PV Bar Graph – This field indicates the value
of the PV (or MEAN) function block, which is
the same as the value shown in the PV display
box.
•
•
•
Standard Deviation Units – This area
provides the engineering units description
used for the STDEV or CV, as defined in the
OUT_SCALE parameter.
Standard Deviation EU 100 – This value
corresponds to 100% of scale for STDEV or
CV.
•
Standard Deviation EU 0 – This value
corresponds to 0% of scale for the STDEV or
CV.
•
Standard Deviation Bar Graph – This field
indicates the value of STDEV or CV, which is
the same as the value shown in the Standard
Deviation display box.
•
Tick Marks – Use this vertical arrangement of
black lines to indicate percentages of
PV/MEAN and STDEV/CV.
•
14
Standard Deviation – This field displays the
OUT value from either the STDEV or the CV
function block, as specified in the FP_VAR_2
parameter. The background color of the 3-D
box changes from gray to orange or red when
the Standard Deviation status becomes
uncertain or bad, respectively. The displayed
decimal format of STDEV or CV is determined
by the OUT_SCALE.DECPT parameter field.
PV Alarm Limits – These arrowheads are
vertically positioned relative to the PV bar
graph to indicate the High High, High, Low,
and Low Low Alarm Limits for the PV, or the
High and Low Alarm Limits for the MEAN. The
alarm limit values they indicate can be
modified by using the module’s detail display.
Only alarms that are enabled have a
corresponding arrowhead displayed. The color
corresponds to the alarm priority.
•
Standard Deviation Alarm Limits – These
arrowheads are vertically positioned relative to
the Standard Deviation bar graph to indicate
the High and Low Alarm Limits for the STDEV
or CV. The alarm limit values they indicate can
be modified by using the module’s detail
display. Only alarms that are enabled have a
corresponding arrowhead displayed. The color
corresponds to the alarm priority.
•
Alarm Indicators – This is a scrollable list of
the current alarms in the control module. The
list functions like the first two columns of an
alarm summary. The first column shows the
state of the alarm represented by one of the
following symbols:
•
Active/unacked – blank field
•
Active/acked – checkmark
•
Inactive/unacked – empty box
The second column is the alarm name or
parameter. The text and colors are as configured
for the alarm’s current state.
Unit Field – This field displays the unit name.
Toolbar – Click the icons from left to right to perform
the following functions, respectively:
•
Detail Display button: open the detail display
for the control module.
•
Primary Control Display button: open the
primary control display.
•
Launch AMS button: opens the AMS Device
Manager Overview or Configuration screen for
transmitter providing SPM data to this control
module. The DeltaV tag of the transmitter must
be specified in the DEVICE_TAG parameter of
the module.
•
Control Studio button: open Control Studio.
•
Process History View button: opens the
DeltaV Process History View, and displays a
trend of the two variables (PV or MEAN and
STDEV or CV) shown on the faceplate.
•
Acknowledge Alarms button: acknowledge all
alarms on this module.
Technical Note
00840-1300-4801, Rev AA
April 2013
Advanced Diagnostics
OPERATOR DETAIL DISPLAY (RMT_SPM_DT)
Figure 10. DeltaV Operate View of the Statistical Process Monitoring Detail Display (RMT_SPM_DT)
The Statistical Process Monitoring detail display
provides you with access to modify alarm
configuration and simulation. It includes the following
items:
DeltaV Alarm Limits
These fields are used to specify the limits for module
alarms. Each of the alarms is assigned to one of the
function blocks in the module: AI1 (PV), MEAN,
STDEV, and CV. Note that the alarm limits set within
the module may be different than alert limits internal
to a transmitter with SPM.
•
Hi Hi Lim – This field displays the maximum
value of the PV in engineering units before the
high high limit active bit (HI_HI_ACT for the
AI1 function block) is set. Click this field to
enter a new limit.
•
Hi Lim – This field displays the maximum
value of the PV in engineering units before the
high limit active bit (HI_ACT for the AI1
function block) is set. Click this field to enter a
new limit.
15
Technical Note
00840-1300-4801, Rev AA
April 2013
Advanced Diagnostics
•
Lo Lim – This field displays the minimum
value of the PV in engineering units before the
low limit active bit (LO_ACT for the AI1
function block) is set. Click this field to enter a
new limit.
•
Lo Lo Lim – This field displays the minimum
value of the PV in engineering units before the
low low limit active bit (LO_LO_ACT for the
AI1 function block) is set. Click this field to
enter a new limit.
•
•
Low Cutoff – Activated when the Low Cutoff
I/O option for the AI1 function block is enabled.
When the converted measurement is below
the LOW_CUT value, it is shown in the PV as
0.0.
•
Mean Hi Lim – This field displays the
maximum value of the Mean in engineering
units before the high limit active bit (HI_ACT
for the MEAN function block) is set. Click this
field to enter a new limit.
•
Mean Lo Lim – This field displays the
minimum value of the Mean in engineering
units before the low limit active bit (LO_ACT
for the MEAN function block) is set. Click this
field to enter a new limit.
•
16
Alm Hysteresis – This field displays the alarm
hysteresis (or deadband) value for the PV
(AI1) alarms in % of PV Scale. Click this field
to enter a new value. An alarm does not recur
until the PV has backed away from the
corresponding limit by at least the % of PV
Scale specified by this value.
Mean Alm Hysts – This field displays the
alarm hysteresis (or deadband) value for
MEAN alarms in % of Mean Scale. Click this
field to enter a new value. An alarm does not
recur until the Mean has backed away from
the corresponding limit by at least the % of
Mean Scale specified by this value.
•
Std Dev Hi Lim – This field displays the
maximum value of the Standard Deviation in
engineering units before the high limit active
bit (HI_ACT for the STDEV function block) is
set. Click this field to enter a new limit.
•
Std Dev Lo Lim – This field displays the
minimum value of the Standard Deviation in
engineering units before the low limit active bit
(LO_ACT for the STDEV function block) is set.
Click this field to enter a new limit.
•
Std Dev Alm Hysts – This field displays the
alarm hysteresis (or deadband) value for the
STDEV alarms in % of Standard Deviation
Scale. Click this field to enter a new value. An
alarm does not recur until the Standard
Deviation has backed away from the
corresponding limit by at least the % of
Standard Deviation Scale specified by this
value.
•
CV Hi Lim – This field displays the maximum
value of the Coefficient of Variation (CV) in
engineering units before the high limit active
bit (HI_ACT for the CV function block) is set.
Click this field to enter a new limit.
•
CV Lo Lim – This field displays the minimum
value of the CV in engineering units before the
low limit active bit (LO_ACT for the CV
function block) is set. Click this field to enter a
new limit.
•
CV Alm Hysts – This field displays the alarm
hysteresis (or deadband) value for the CV
alarms in % of CV Scale. Click this field to
enter a new value. An alarm does not recur
until the CV has backed away from the
corresponding limit by at least the % of CV
Scale specified by this value.
DeltaV Alarms
These fields show the configured alarm priority for
each alarm, and allow the alarms to be enabled,
disabled and suppressed. Note that the alarm priority
fields are read-only. Each of the alarms are assigned
to one of the function blocks: AI1, MEAN, STDEV,
and CV. The table below shows the function block
and alarm corresponding to each of the fields.
Field
Hi Hi
Hi
Lo
Lo Lo
PV Bad
Mean Hi
Mean Lo
Std Dev Hi
Std Dev Lo
CV Hi
CV Lo
Function Block
AI1
AI1
AI1
AI1
AI1
MEAN
MEAN
STDEV
STDEV
CV
CV
Alarm
HI_HI
HI
LO
LO_LO
BAD_ACTIVE
HI
LO
HI
LO
HI
LO
Technical Note
00840-1300-4801, Rev AA
April 2013
Priority Adj
Priority Adj – Use this to decrease the alarm priority
at run time. If a module has more than one alarm
configured, the alarm priorities are all reduced by the
same value, except that the lowest priority that will be
set is 3, a logged event.
(For example, if a module has three alarms,
configured with alarm priorities of 12, 8, and 5, and a
priority adjustment of 5 is made, the run-time alarm
priorities will be set to 7, 3, and 3, respectively).
The configurable alarm priority held in the PRI field of
each alarm parameter remains unchanged.
Therefore, setting the priority adjustment back to 0
reestablishes the original priority levels (in the above
example, 12, 8, and 5). Refer to DeltaV Books Online
Events and Alarms Reference for more information
on the ALARMS parameter and to System Alarm
Management for more information on alarm priorities.
Diagnostics
This section displays visible text for active conditions
in the module’s MERROR, MSTATUS, and
BLOCK_ERR parameters. There is a tab for each
parameter. The parameter name on the tab is
underlined when an active condition for that
parameter is displayed. When an error has occurred
in the module, a Clear Error button is displayed on
the MERROR tab. Click this button to clear active
errors.
Simulate
These fields are used to activate simulated values
into any of the function blocks (AI, MEAN, STDEV, or
CV). For each of the four function blocks, the
following fields are shown:
•
Sim Enable – This check box is used to
enable or disable the simulate value as input
to the AI function block. When the check box is
checked, the value in “Sim Value” is used to
calculate the PV value.
•
Sim Value – This is the simulated field value.
To scale this value, use the OUT_SCALE to
calculate the PV value when simulate is
enabled. Click this field to enter a new value.
•
Field Value – This value indicates the raw
field value. To scale this value, use the
OUT_SCALE to calculate the PV value when
simulate is disabled.
Advanced Diagnostics
The following parameters are used to change the
SPM variable that is shown on the Faceplate:
•
Left Operator Variable (FP_VAR_1) – This
field displays the variable that is assigned to
the left side of the operator faceplate. User
configurable to either PV or Mean.
•
Right Operator Variable (FP_VAR_2) – This
field displays the variable that is assigned to
the right side of the operator faceplate. User
configurable to either Standard Deviation
(STDEV) or CV.
Overall Alarm Control
•
All Hi/Lo Alarms – This read-only field
displays the enabled status of all high and low
alarms in the module. For example, external
logic may be used to disable all alarms during
start-up or shutdown. This field shows the
result of that logic.
•
PV/Mean Alarms – This read-only field
displays the enabled status of all PV and
Mean alarms configured. This field is always
the same as “All Hi/Lo Alarms.”
•
StDev/CV Alarms – This read-only field
displays the status of all StDev and CV alarms
configured. If the PV or MEAN exceeds its
limit, and the check-box below is checked,
then the StDev and CV alarms will be
disabled.
•
Disable Std Dev and CV Alarms when PV
exceeds limits – This check box is used to
enable or disable whether the PV or MEAN (as
selected in “Left Operator Variable”) exceeding
its limits, will cause the Std Dev and CV alarms
to be disabled.
Tuning
PV Filter TC – This field indicates the PV filter time
constant of the AI1 function block in seconds. Click
this field to enter a new value.
17
Technical Note
00840-1300-4801, Rev AA
April 2013
Advanced Diagnostics
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