Getting More from HART Communications Ron Helson HART

“Getting More from HART Communications” Ron Helson HART Communication Foundation Austin, TX WE’VE GOT ABILITY 1

HART Communication Protocol The Worldwide Standard for Smart Instrument Communication 2 HART is a registered trademark of the HART Communication Foundation

Things You Probably Know About HART n n Most smart instruments use HART Communication HART smart field devices are used interchangeably with traditional analog only units Hand Held Communicators are often used to perform device set-up, calibration, commissioning and periodic maintenance functions PC-based instrument management tools can remotely communicate with HART devices to manage calibration and other instrument parameters from central locations (instrument shop or control room) HART = $ Savings for Installation & Maintenance 3

Things You May Not Know About HART n n n All HART smart devices generate considerable data of value to process operations 24/7 HART provides access to all device data while the 4 -20 m. A analog signal is being used for control Information about the status (health) of the field device and quality of the 420 m. A signal is transmitted with every message The Primary Variable is transmitted as a 4 -20 m. A signal and also as digital value Many devices have other process variables (measured or calculated) in addition to the Primary Variable Using HART Data = More Asset VALUE 4

Getting More from Your HART Assets n HART devices can provide much more VALUE! – – – n In most installations, communication with HART devices is occasional or infrequent at best Communication is typically through hand held communicators for initial commissioning and periodic maintenance This “part-time” communication provides real savings, but uses only a small portion of the capability available in HART devices Continuous communication allows YOU to get the full value from YOUR HART assets Continuous Communication = More VALUE 5

What You should know About HART Device Data n 35 -40 data items Standard in every HART device – – – n Device Status & Diagnostic Alerts Process Variables & Units Loop Current & % Range Basic Configuration Parameters » Upper & Lower Range Values » Loop Test » Force Loop Current to specific value Manufacturer & Device Tag Standard commands for easy access Let’s look at the Easy-to-Use Data Items 6

HART Device Data n n Data in HART devices is Valuable to more than just the Instrument Dept Data includes: – – Process Variables Device Status Alerts Device Information Basic Calibration Information All Data is easily available to Your Plant Systems! 7

Digital Process Variable Data n Many HART devices are multi-variable and support more than one process measurement or calculated value – – – n All Process Variable data includes: – – – n n Many Pressure & Temperature devices Most Flow, Level & Analytical devices All Valve Positioners / Controllers IEEE Floating Point Value Standard Engineering Units Code Process Data Status Primary Variable is continuously transmitted on the 4 -20 m. A loop HART gives You access to All Process Variables in the device 8

Typical HART Process Variable Data 9

Status & Diagnostics n n HART smart field devices continuously self -assess and monitor their performance Device status information returned with every message Includes quality of 4 -20 m. A signal and process variable data Using HART data increases control system integrity – – – Get early warning of device problems Automatically track and detect changes in Range or Engineering Units Validate PV and Loop Current values at control system against those read from the device Now let’s look at how to Use this Data 10

Getting HART in Plant Systems n MMI Engineering Maintenance Most control system suppliers offer some type of HART interface solution today – Controller I/O H A R T D A T A – – n Capability varies Several have HART-capable I/O Others working to improve Third party interfaces – – – Multiplexers - Provides path for HART data to OPC Servers and PC-based configuration and diagnostic applications Gateways to plant networks - TCP/IP Ethernet, Modbus, Profibus, etc Loop Monitors - convert HART device data into 4 -20 m. A signals, contact closures or fault alarms 11

Getting HART on Plant Networks n n OPC Server provides easy access to HART device data anywhere on plant network Allows several applications to access data in a HART device at the same time Provides popular MMI and Trending packages with access to data in HART devices Connect to one or thousands of devices using common HART I/O systems & interfaces HART SERVER TOOL HART Device Data on Your Desktop Process Variables, Range Values, Device Status 12

Using HART in Control Systems n Continuously Monitor Device Status & Diagnostics – – – n Validate data between Device & System – – – n Device Malfunction Loop Current Fixed Device Needs Maintenance Read Loop Current, PV and Range values from device Validate with system values Track changes in Upper/Lower Range values (20 m. A & 4 m. A points) Use capability of Multi-Variable devices – – Access 2 nd, 3 rd & 4 th Process Variables for operator display, trending, or control functions Get value from additional measurements, calculated values (totalizers), actual valve position, etc. 13

Adding HART to Control Systems n MMI Engineering Maintenance n H A RT Controller n – – D A T A – n I/O Some control systems have direct interface and support the use of HART process & diagnostic data through-out Third party products support use with non. HART systems Multiplexer - Parallel with system I/O HART DATA n n Several manufacturers Some integrally packaged with FTA Data access may be limited if one HART channel serves multiple devices Gateways - HART to Modbus, HART to Profibus and more to come. . . Tri-Loop - Converts secondary process variables into 4 -20 m. A signals SPA - Converts secondary variables and device status alerts into contact closures 14

Multi. Variable Interface for -HART Systems 4 -20 m. A Signals non FV-Differential Pressure TV-Static Pressure SV-Temperature PV-Compensated Flow Tri-Loop takes digital process variable values from HART and produces 4 -20 m. A signal for each secondary variable HART Burst Mode Command #3 One Wire from Field to Control Room Multiple Analog Signals to Control System HART Multi. Variable Transmitter With process variables for Compensated Flow, Differential Pressure, Static Pressure, and Temperature 15

Critical Loop Interface for -HART Systems non SPA gets process variable and device status data via HART and generates additional 4 -20 m. A signal and/or contact closures for High/Low Alarm or Instrument Fault 4 -20 m. A Proportional to PV HART Multivariable Device HART Instrument Fault Alarm Second Variable (SV) High/Low Alarm Third Variable (TV) High/Low Alarm Fourth Variable (FV) High/Low Alarm 4 -20 m. A Proportional to SV, TV, or FV One Wire from Field to Control Room Multiple Analog Signals and Alarm Contacts in the Control System 16

HART Master (Host) Capabilities n n Master implementation rules are more flexible than field device rules Capabilities vary based on the application – n n Example: Field Calibrator does not provide functionality as DCS same Simple HART features not supported in all Masters HART Master Classifications Class 0 1 2 3 4 5 Description Host does not meet the minimum requirements of Conformance Class 1 The host can utilize cyclical process data from any field device The host can supply the user with basic identification and configuration data from any field device The host can perform basic configuration for any field device - Minimum level for classification as “Generic Host” The host provides basic commissioning and calibration support for any device The host can access all data items and device specific functions for any device 17

Other Things You Should Know n HART is Safe, Secure, and Available – – n Saves Time and Money – – – n Install and commission devices in fraction of the time Enhanced communications and diagnostics reduce maintenance & downtime Low or no additional cost by many suppliers Improves Plant Operation and Product Quality – – – n Tested and Accepted global standard Supported by all major instrumentation manufacturers Additional process variables and performance indicators Continuous device status for early detection of warnings and errors Digital capability ensures easy integration with plant networks Protects Your Asset Investments – – – Compatible with existing instrumentation systems, equipment and people Allows benefits to be achieved incrementally No need to replace entire system HART = High VALUE + No RISK 18

Summary n n You probably have HART devices in your plant today Now you know more about the valuable data they can provide Its easy to get the additional data and VALUE from Your HART devices - Risk Free! HART is the lowest cost solution for improving Plant Performance and supporting Asset Management initiatives 19

What to Do? n n Identify your HART devices Provide HART capability training for your staff Talk with your systems supplier about access to your HART data and providing you with tools to better use the capability in your HART devices Use your assets to their fullest… You probably are using only a small part of HART-ability Find Out More! 20

Support for HART Technology HART ® COMMUNICATION FOUNDATION n n n Provides Worldwide Support for Application of the HART Protocol Technology Owner and Standards Setting Body for the HART Protocol Independent Non-Profit Organization Funded by Membership and Training/Support service fees Any Company interested in Use of the HART Protocol should be a member 21

Foundation Services n n Manage and control the HART Protocol Specifications Enhance the HART Technology as necessary to support industry needs for Smart Instrumentation Provide Training Workshops, Newsletters, Web Site and other Services to Educate Industry on use of the HART Protocol Manage Library of all Registered Device Descriptions 22

The Bottom Line. . . Most Users and Suppliers do not use the full value of HART Communication Get More from HART Communications! The HCF is here to help YOU! 23

Contact Information HART Communication Foundation 9390 Research Blvd. , Suite I-350 Austin, Texas 78759 USA Tel: +512 794 -0369 Fax: +512 794 -3904 e-mail: hcfadmin@hartcomm. org www. hartcomm. org Thank You for Your Attention! 24