multi-variable analog interface overview - honeywell · multi-variable analog interface. 3...

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


MVA Block Diagram

Analog Outputs

Status Output

Power

Digital Transmitter Input

STAT

RLY

DE

PWR


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


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


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


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.


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:


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


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


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



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



Single-Variable Transmitter

Analog PVs

Status

MVA

DPTemperature

• Access Secondary Variable (Temperature)

• 80% Increase in DP Accuracy

• Independent Transmitter Status


Handheld Communicator


Accuracy Enhancement

Typical analog installation . . .

Analog 4-20mA

Control System

±0.1%

RL ±0.1%

Overall Accuracy = ± 0.2 %

Analog 1-5 volts





80% improvement with MVA . . .

±0.075%


MVA

Digital PV and Status

±0.045%

Status

Analog1-5 volts

Control System



Competitive approach . . .

HART

Control System

±0.075%

Tri-Loop

±0.045%

analog 1-5 volts

±0.1%


Brand “R” Pressure

Transmitter



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% !


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.



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


MVA Control System

MTS

Analog

Status

Trip

Analog

MotorRecorder(s)


MVA Configuration

• No Special Tools !

• Secure

Release Tabs

Configuration Switches


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


Helping You Control Your World


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

multi-variable analog interface overview - honeywell · multi-variable analog interface. 3...

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