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MVA Multi-Variable Analog Interface
Overview
2 HONEYWELL - CONFIDENTIAL July 6, 2010
What is the MVA ?
Interfaces Honeywell Smartline® digitally enhanced (DE) transmitters with analog instrumentation, such as safety systems, analog DCSs, and recorders.
Multi-Variable Analog Interface
3 HONEYWELL - CONFIDENTIAL July 6, 2010
MVA Block Diagram
Analog Outputs
Status Output
Power
Digital Transmitter Input
STAT
RLY
DE
PWR
4 HONEYWELL - CONFIDENTIAL July 6, 2010
Typical MVA Usage
• Multivariable Transmitter Interface
• Analog Safety System Interface
• Accuracy Enhancement
Analog Outputs
Status Output
Power
MultivariableTransmitter Input
STAT
RLY
DE
PWR
Analog Control System
DP
AP
Temp
Flow
ST 3000 Pressure Transmitter
5 HONEYWELL - CONFIDENTIAL July 6, 2010
MVA Benefits
• Allows mixing of DE and ANALOGinstrumentation:- Safety Systems, Controllers, Recorders, etc.
• Access to all variables saves on wiring costs.
• Increases analog accuracy 80% !
• Bumpless & secure digital communication.
• Independent transmitter status.
• Expands functionality while maintaining full digital integration.
• Enables stand-alone digital operation
MVA
6 HONEYWELL - CONFIDENTIAL July 6, 2010
MVA Features
• 4 high-precision analog outputs
• Independent transmitter status relay
• 4 LED indicators
• Compatible with all DE protocol modes
• Modular DIN rail mount
• Test mode
• CE Mark & CSA
• Configurable fail-safe and “Output Mode” action
MVA
7 HONEYWELL - CONFIDENTIAL July 6, 2010
Safety System Benefits
• Bumpless & secure digital communication.
• The independent transmitter status output differentiates a MAINTENANCE problem from a PROCESS problem. False shutdowns may be avoided by incorporating the status output into the shutdown strategy.
• Configurable “forced INPUT/OUTPUT manual” mode for routine validation testing.
8 HONEYWELL - CONFIDENTIAL July 6, 2010
ST STT MagneW
PV1 Pressure Temperature Volumetric Flow
SV1 Sensor Temperature Cold Junction Temperature Totalized Flow2
2 = not available for MVA
SCM SGC SLT SMV
PV1
PV2
PV3
PV4
Mass Flow
Temperature
Density
% Solids
Gas Component
Gas Component
Gas Component
Gas Component
Level
Mass | Volume1
n/a
n/a
DP
AP
Temperature
Compensated Flow
SV1
SV3
Totalized Flow2
n/a
Toven | PCarrier Gas2
| PAtmos2
n/a
n/a
n/a
Sensor Temperature
CJT2
1 = choice of one
2 = not available for MVA
PVs and SVs
Multi-Variable Transmitters:
Single-Variable Transmitters:
9 HONEYWELL - CONFIDENTIAL July 6, 2010
MVA Application Examples
• Multivariable Transmitter- Wiring savings
• Safety System- Analog I/F
- Bumpless communication
- Pass forced output values
• Stand Alone- Digital communication
• Single Variable Transmitter- Access second variable
• Accuracy Enhancement
MVA
10 HONEYWELL - CONFIDENTIAL July 6, 2010
Multi-variable PV Access
• Access DP, AP, Temperature and Flow
• Connect to Any Analog DCS
• 80% Accuracy Increase for All Variables
• Independent Transmitter Status
• Reduce Wiring Costs
SMV 3000 Multi-variable
Pressure Transmitter
MVA
Flow ComputerAnalog
Status
2-wire All Digital Communications
11 HONEYWELL - CONFIDENTIAL July 6, 2010
Safety System Interface
• Maintain Full Digital Integration
• Bumpless & Secure Communication
• Test & Validate Using Handheld Communicator
• Incorporate Transmitter Status into Strategy
MTS
2-wire digital communications Digital Control System
Safety System
Handheld Communicator
Status
Analog
ST 3000 Pressure Transmitter
12 HONEYWELL - CONFIDENTIAL July 6, 2010
Stand Alone Flow Application
• Access DP, AP, Temperature, Flow and Transmitter Status
• 80% Accuracy Increase for All Variables
• Bad PV Protection
MVA
2-wire digital communications
Power
Status
Analog
SMV 3000 Multivariable
Pressure Transmitter
13 HONEYWELL - CONFIDENTIAL July 6, 2010
ST 3000 Pressure Transmitter
Single-Variable Transmitter
Analog PVs
Status
MVA
DPTemperature
• Access Secondary Variable (Temperature)
• 80% Increase in DP Accuracy
• Independent Transmitter Status
2-wire All Digital Communications
Handheld Communicator
14 HONEYWELL - CONFIDENTIAL July 6, 2010
Accuracy Enhancement
Typical analog installation . . .
Analog 4-20mA
Control System
±0.1%
RL ±0.1%
Overall Accuracy = ± 0.2 %
Analog 1-5 volts
ST 3000 Pressure Transmitter
15 HONEYWELL - CONFIDENTIAL July 6, 2010
ST 3000 Pressure Transmitter
Accuracy Enhancement
80% improvement with MVA . . .
±0.075%
Overall Accuracy = ± 0.12 %
MVA
Digital PV and Status
±0.045%
Status
Analog1-5 volts
Control System
16 HONEYWELL - CONFIDENTIAL July 6, 2010
Accuracy Enhancement
Competitive approach . . .
HART
Control System
±0.075%
Tri-Loop
±0.045%
analog 1-5 volts
±0.1%
Overall Accuracy = ± 0.22 %
Brand “R” Pressure
Transmitter
17 HONEYWELL - CONFIDENTIAL July 6, 2010
Accuracy Enhancement
Comparison Results . . .
DE Digital = ±0.075 %
DE Digital w/MVA = ±0.12 %
Analog 4-20mA = ±0.20 %
HART w/Tri-Loop = ±0.22 %
MVA increases overall accuracy by 80% !
18 HONEYWELL - CONFIDENTIAL July 6, 2010
MVA Competition
• Rosemount “Tri-Loop”- Only works with 2 transmitters.
- Upper operating temperature is only 104°F.
- Not suited for Control or Safety applications• Low accuracy current outputs
• No “Bad PV” protection
• Lacks “Last Known Good” feature
• All outputs go bad if any 1 variable fails.
- Must be factory pre-configured or user needs PC, modem, software and license.
- Must be powered from the first current loop.
- Can NOT be used in a stand alone applications.
- No indicators.
19 HONEYWELL - CONFIDENTIAL July 6, 2010
ST 3000 Pressure Transmitter
Installation
• Mix, Match and Multidrop
• Installs Without Disconnecting Existing Installation
• Maximize DE Input & Minimize Analog Output Wire Runs
• Installs Either as Stand Alone or Listener
2-wire All Digital Communications
MVA Control System
MTS
Analog
Status
Trip
Analog
MotorRecorder(s)
20 HONEYWELL - CONFIDENTIAL July 6, 2010
MVA Configuration
• No Special Tools !
• Secure
Release Tabs
Configuration Switches
21 HONEYWELL - CONFIDENTIAL July 6, 2010
MVA Benefits Summary
• Access to all variables saves on wiring costs.
• Allows mixing of DE and ANALOG instrumentation
• Increases analog accuracy 80% !
• Secure digital communication.
• Independent transmitter status differentiates a MAINTENANCE problem from a PROCESS problem.
• Expands functionality while maintaining full digital integration.
• Enables stand-alone digital operation
22 HONEYWELL - CONFIDENTIAL July 6, 2010
Helping You Control Your World
23 HONEYWELL - CONFIDENTIAL July 6, 2010
MVA or MTS ?
MVA MTS
DE Inputs 1 1
Bumpless Comm YES YES
MV Capability YES YES
SV Temp Capability YES YES
Independent Status Relay YES YES
Stand-Alone & Pwr Xmtr YES YES
DE Integrate w/TDC, AB, etc. YES YES
Analog Outputs 4 1
Analog Input NO YES
PV Trip Relay NO 2