Smart Transmitter Interface Products (HART Protocol)
Smart Transmitter Interface Products(HARTr Protocol)Cat. Nos. 1770-HT1, 1770-HT8, 1770-HT16User Manual
Important User InformationBecause of the variety of uses for the products described in this publication,those responsible for the application and use of this control equipment mustsatisfy themselves that all necessary steps have been taken to assure that eachapplication and use meets all performance and safety requirements, includingany applicable laws, regulations, codes and standards.The illustrations, charts, sample programs and layout examples shown in thisguide are intended solely for purposes of example. Since there are manyvariables and requirements associated with any particular installation, theAllen-Bradley Company, Inc. does not assume responsibility or liability (toinclude intellectual property liability) for actual use based upon the examplesshown in this publication.Allen-Bradley Publication SGI-1.1, “Safety Guidelines for the Application,Installation and Maintenance of Solid State Control” (available from your localAllen-Bradley office) describes some important differences between solid-stateequipment and electromechanical devices which should be taken intoconsideration when applying products such as those described in thispublication.Reproduction of the contents of this copyrighted manual, in whole or in part,without written permission of the Allen-Bradley Company Inc. is prohibited.Throughout this manual we use notes to make you aware of safetyconsiderations:ATTENTION: Identifies information about practices orcircumstances that can lead to personal injury or death, propertydamage or economic loss.Attentions help you:identify a hazardavoid the hazardrecognize the consequencesImportant: Identifies information that is especially important forsuccessful application and understanding of the product.Interchange, ControlView, Data Highway Plus and DH are trademarks and PLC is a registeredtrademark of Allen-Bradley Company, Inc.HART is a registered trademark of Rosemount Inc.IBM is a registered trademark of International Business Machines Corporation.
Table of ContentsPreface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .P 1Purpose of the Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Organization of the Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . .How to Use This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Related Publications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Allen Bradley Publications . . . . . . . . . . . . . . . . . . . . . . . . . . .HART Publications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Related Products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Glossary of Terms and Abbreviations . . . . . . . . . . . . . . . . . . . . . .P 1P 1P 1P 2P 2P 2P 2P 3P 3Introducing the Smart Transmitter Interface . . . . . . . . . . . .1 1Product Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1770 HT1 Communications Controller . . . . . . . . . . . . . . . . . . .1770 HT8/16 Terminal Block . . . . . . . . . . . . . . . . . . . . . . . . . .The Remote I/O Port of the Communications Controller . . . . . . .The RS 232C Port of the Communications Controller . . . . . . . .The HART Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .The HART Protocol and the Smart Transmitter Interface . . . . . .Poll/Response Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Burst Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Features of the Smart Transmitter Interface . . . . . . . . . . . . . . . . .Benefits of Using the Smart Transmitter Interface . . . . . . . . . . . . .Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .PLC 5 Family . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .HART Field Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Analog I/O Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Hand Held Terminal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 11 11 31 41 51 81 91 101 101 101 111 121 121 121 131 13Installing the Smart Transmitter Interface Products . . . . . .2 1Before You Begin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Electrostatic Damage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Overview of the Installation Procedure . . . . . . . . . . . . . . . . . . . . .Mounting Smart Transmitter Interface Products in a Cabinet . . . . .Connecting the Communications Controller to the Terminal Blocks .Digital Communications Cables . . . . . . . . . . . . . . . . . . . . . . . .Linear Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Star Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Star/Linear Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Connector and Pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Setting the Board Address Jumpers . . . . . . . . . . . . . . . . . . . . . . .2 12 22 22 32 42 42 52 62 72 82 9
iiTable of ContentsMarking the Terminal Block Labels . . . . . . . . . . . . . . . . . . . . . .Connecting the Terminal Blocks to I/O and HART Field Devices . . .Connecting to 1771 I/O Devices . . . . . . . . . . . . . . . . . . . . . . .Connecting to HART Field Devices . . . . . . . . . . . . . . . . . . . . .Connecting a Hand Held Terminal . . . . . . . . . . . . . . . . . . . . . .Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Grounding the HART Field Device Cable Shield . . . . . . . . . . . .Grounding the Analog I/O Cable Shield . . . . . . . . . . . . . . . . . .Supplying Power to the Communications Controller andTerminal Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Fuses for the Communications Controller . . . . . . . . . . . . . . . . .Connecting Power to the Communications Controller . . . . . . . . .Supplying Loop Power for HART Field Devices . . . . . . . . . . . . . . .Power Supply Requirements . . . . . . . . . . . . . . . . . . . . . . . . . .Connecting the Power Supply for Loop Power . . . . . . . . . . . . .Connecting the Communications Controller to the RIO Host . . . . . .Termination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Activity Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Connecting the Communications Controller to the RS 232C Host . .RS 232C Baud Rates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Activity Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Connector and Pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Modem Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 112 112 122 132 162 182 182 182 192 192 202 202 212 212 222 232 242 242 242 242 242 242 29Configuring the Communications Controller . . . . . . . . . . .3 1Overview of Configuration Procedures . . . . . . . . . . . . . . . . . . . . .Displays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Push Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Configuration Step by Step . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Enter Configuration Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . .Configure Basic Parameters . . . . . . . . . . . . . . . . . . . . . . . . . .Configure Advanced RS 232C Parameters . . . . . . . . . . . . . . . .Save and Exit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Exit Without Saving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Setting Factory Defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Communication Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . .Basic Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Basic Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Advanced RS 232C Communication Parameters . . . . . . . . . . .Verifying the Communication Parameters . . . . . . . . . . . . . . . . . . .Marking the Communications Controller Label . . . . . . . . . . . . .3 13 13 23 33 33 43 43 43 53 63 63 63 63 83 103 10
Table of ContentsiiiCommunicating with the Smart Transmitter Interface . . . .4 1Data Routing and Protocol Conversion . . . . . . . . . . . . . . . . . . . . .Data Routing In Poll and Response Mode . . . . . . . . . . . . . . . . .Data Routing in Burst Monitor Mode . . . . . . . . . . . . . . . . . . . . .Protocol Conversion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Definition of Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .HART Poll Packets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Preamble . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .HART Delimiter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .HART Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .HART Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Byte Count . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Check Byte . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .HART Response and Burst Data Packets . . . . . . . . . . . . . . . . . . .Preamble . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .HART Delimiter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .HART Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .HART Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Byte Count . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Response Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Check Byte . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Smart Transmitter Interface Packets Received by theSmart Transmitter Interface . . . . . . . . . . . . . . . . . . . . . . . . . .Smart Transmitter Interface Command . . . . . . . . . . . . . . . . . . .Smart Transmitter Interface Channel . . . . . . . . . . . . . . . . . . . .Smart Transmitter Interface Control . . . . . . . . . . . . . . . . . . . . .Smart Transmitter Interface Parameter . . . . . . . . . . . . . . . . . . .Smart Transmitter Interface Data . . . . . . . . . . . . . . . . . . . . . . .Smart Transmitter Interface Packets Sent by the SmartTransmitter Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Smart Transmitter Interface Command . . . . . . . . . . . . . . . . . . .Smart Transmitter Interface Channel . . . . . . . . . . . . . . . . . . . .Smart Transmitter Interface Error Code . . . . . . . . . . . . . . . . . .Smart Transmitter Interface Status . . . . . . . . . . . . . . . . . . . . . .Smart Transmitter Interface Data . . . . . . . . . . . . . . . . . . . . . . .Valid Smart Transmitter Interface Commands and Responses . . . .No Operation (hexadecimal command 00) . . . . . . . . . . . . . . . .Enable Poll and Response Mode (hexadecimal command 01) . .Enable Burst Monitor Mode (hexadecimal command 02) . . . . . .Send Message to Device (hexadecimal command 10) . . . . . . . .Read Burst Data (hexadecimal command 11) . . . . . . . . . . . . . .Set Number of Preambles (hexadecimal command 20) . . . . . . .Set Number of Retries (hexadecimal command 21) . . . . . . . . . .4 14 24 24 34 44 54 54 54 54 84 84 94 94 94 94 94 104 114 114 124 134 134 144 144 144 154 164 164 164 164 174 174 174 194 194 204 204 204 204 214 214 22
ivTable of ContentsRead Status and Statistics (hexadecimal command 30) . . . . . . .Reset Statistics Counters (hexadecimal command 31) . . . . . . . .Read ID (hexadecimal command 32) . . . . . . . . . . . . . . . . . . . .Programmable Controller Communication with HART Field DevicesShort Frame Word Contents Programmable Controller to SmartTransmitter Interface (Offset at D9:00) . . . . . . . . . . . . . . . .Short Frame Word Contents Smart Transmitter Interface toProgrammable Controller (Offset at D9:40) . . . . . . . . . . . . .Long Frame Word Contents Programmable Controller to SmartTransmitter Interface (Offset at D9:10) . . . . . . . . . . . . . . . .Long Frame Word Contents Smart Transmitter Interface toProgrammable Controller (Offset at D9:40) . . . . . . . . . . . . .Serial Communication with the Smart Transmitter Interface . . . . . .Full Duplex . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Half Duplex . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .DF1 Packet Formation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Data Highway Plus and the Smart Transmitter Interface . . . . . . . . .4 224 224 224 254 334 344 354 354 374 40Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 1Interpreting the Terminal Block LEDs . . . . . . . . . . . . . . . . . . . . . .Interpreting the Communications Controller Status LEDs . . . . . . . .Interpreting the Communications Controller Status LEDs . . . . . .Interpreting the Communications Controller Numeric Displays . . . .5 15 25 25 3Product Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . .A 1Communications Controller (1770 HT1) . . . . . . . . . . . . . . . . . . . .RS 232 Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .RIO Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Terminal Block (1770 HT8/16) Interface . . . . . . . . . . . . . . . . . .Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Physical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Environmental . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 Channel Terminal Block (1770 HT8) . . . . . . . . . . . . . . . . . . . . .1770 HT1 Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 20 mA Current Loop Interfaces (see Figure A.1) . . . . . . . . . .Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Physical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Environmental . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16 Channel Terminal Block (1770 HT16) . . . . . . . . . . . . . . . . . . .1770 HT1 Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 20 mA Current Loop Interfaces (see Figure A.1) . . . . . . . . . .Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Physical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Environmental . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .HART Communications Specifications . . . . . . . . . . . . . . . . . . . . .A 1A 1A 1A 1A 2A 2A 2A 2A 2A 2A 3A 3A 3A 3A 3A 4A 4A 4A 4A 54 284 304 31
Table of ContentsvDF1 Diagnostic Command Support . . . . . . . . . . . . . . . . . .B 1Diagnostic Command Support . . . . . . . . . . . . . . . . . . . . . . . . . . .Diagnostic Loop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Diagnostic Read . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Diagnostic Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Diagnostic Counter Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . .B 1B 1B 2B 2B 3Cable Length and Power Supply Requirements . . . . . . . . .C 1Cabling Requirements Between the Communications Controllerand the Terminal Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . .Maximum Power Cable Lengths . . . . . . . . . . . . . . . . . . . . . . .Using a Separate Power Supply for a Terminal Block . . . . . . . . . . .Connecting Power to the Terminal Blocks . . . . . . . . . . . . . . . . .Cabling and Power Supply Requirements for Loop Power . . . . . . .C 1C 2C 4C 4C 5
PrefacePrefacePurpose of the ManualThis manual shows you how to use the Smart Transmitter Interfaceproducts with Allen-Bradley programmable controllers and otherintelligent host computers. It describes how to install and configure theSmart Transmitter Interface products, as well as how to performtrouble-shooting procedures.Organization of the ManualThis manual contains five chapters and three appendices. They address thefollowing topics:ChapterHow to Use This ManualTopics CoveredChapter 1: Introducing the Smart TransmitterInterfaceoverview of the Smart Transmitter Interface;introduction to the HART protocol, and featuresand benefits of using themChapter 2: Installing the Smart TransmitterInterfaceinstallation procedure, power supplyrequirements and connection instructionsChapter 3: Configuring the CommunicationsControllerthe communication parameters and how to setthem on the Communications ControllerChapter 4: Communicating with the SmartTransmitter InterfaceSmart Transmitter Interface data routing andprotocol conversion, communication terms,HART and Smart Transmitter Interface datapackets, PLC 5 programming example, andserial host communication with the SmartTransmitter InterfaceChapter 5: Troubleshootingdiagnosing communications problemsAppendix A: Product Specificationstechnical specifications for 1770 HT1, HT8 andHT16, and HART communicationsspecificationsAppendix B: DF1 Diagnostic Command Supportdiagnostic commands for use on the RS 232Clink between a host processor and theCommunications ControllerAppendix C: Cable Length and Power SupplyRequirementscable length requirements between theCommunications Controller and the TerminalBlocks, and power supply requirementsThis manual explains the features, functions and specifications of threeproducts designed to provide communication between Allen-Bradleyproducts and HARTr field devices. These products are:Communications ControllerCat. No. 1770-HT1P-1
Preface8 Channel Terminal BlockCat. No. 1770-HT816 Channel Terminal BlockCat. No. 1770-HT16AudienceThis manual is intended for use by:persons installing Smart Transmitter Interface products, in connectionwith Allen-Bradley PLC controllers or other intelligent controllerssystem integrators who are designing and establishing network systemsinvolving plant floor machinery, programmable controllers, HART fielddevices, Smart Transmitter Interface products and host computersmaintenance personnel who maintain such systems and who mustlocate, define and correct problems arising during their day-to-dayoperationRelated PublicationsAllen Bradley PublicationsPublicationReference Number and DateAllen Bradley Data Highway/Data Highway Plust/DH485Communication Protocol and Command Set ReferenceManual1770 6.5.16, November 1991Analog Input Module User Manual cat. no. 1771 IFE1771 6.5.90, September 1991ControlView Core User Manual6190 6.5.1, November 1992PLC 5 Family Programmable Controllers HardwareInstallation Manual1785 6.6.1PLC 5 Programming Software6200 6.4.76008 SI IBM PC Scanner User's Manual6008 6.5.3A complete list of publications relating to ControlView and its options isavailable in the ControlView Core User Manual. For a list of publicationson Allen-Bradley programmable controller products refer to theAllen-Bradley publication index (SD499).HART PublicationsP-2PublicationReference Number and DateHART - Smart Communications ProtocolSpecificationRevision 5.1, January 4, 1991Rosemount, Inc. Document No. D9000047,Revision A
PrefaceRelated ProductsThe Smart Transmitter Interface Products create a communication interfacebetween programmable controllers and HART field devices. They arecompatible with HART field devices and with hand-held terminals capableof supporting the physical and data link layers of the HART protocol.Glossary of Terms andAbbreviationsThis manual uses the following terms as defined below.Actuator: any one of several field devices that provide control functionsusing a 4-20mA input control signal. Actuators that support the HARTprotocol are designated as being “smart”.BTR: Block Transfer ReadBTW: Block Transfer WriteClear: (a bit) equal to 0Hand-held terminal: a smart terminal product capable of functioning aseither a primary or secondary master to one single HART device, using theHART protocol; this terminal allows the operator to monitor and configurethe HART field device (e.g. Rosemount 268)HART: Highway Addressable Remote TransducerHART field device: a transducer or actuator that supports the HARTprotocol- 4-wire: refers to a HART field device drawing power from anexternal power source- 2-wire: refers to a HART field device drawing power from the 4-20mA loopHART protocol: a protocol that provides digital communication over anindustry-standard 4-20 mA process control loop at the same time as thevalue of a process control variable is being transmitted as a 4-20 mA signalHost Processor: the programmable controller or host computer (generallya PC) connected to the Communications Controller over the RIO, or thehost computer connected to the Communications Controller’s RS-232 portmA: milliamp; one-thousandth of an AmpereMultidrop: multiple HART field devices (to a maximum of 15), connectedin parallel, per channel on a terminal blockPLC: Programmable Logic Controller; an Allen-Bradley programmablecontrollerP-3
PrefacePoint-to-point: one HART field device per channel on a terminal blockRIO: Remote Input Output link that supports remote, time-critical, I/Oand control communications between a master PLC controller and itsremote I/O and adapter mode slave processorsTransducer/Transmitter: any one of several field devices that canmeasure pressure, temperature, level, flow, density or other process controlvariables, and then transmit the value of that variable as a 4-20 mA signal.Transducers that support the HART protocol are designated as being“smart”.P-4
Chapter1Introducing the Smart Transmitter InterfaceThis chapter provides an overview of the Smart Transmitter Interfaceproducts, a brief introduction to the HART protocol and a description ofthe different system architectures which can be implemented. It alsodescribes the features and benefits of using the Smart Transmitter Interfaceand lists some of the products that are compatible with the 1770-HT1,1770-HT8 and 1770-HT16.Product OverviewThe Smart Transmitter Interface products provide a communicationinterface between Allen-Bradley PLC controllers or host computers andHART field devices (transmitters, transducers and actuators). Theseproducts give host processors access to the digital information encodedwith the 4-20 mA analog process control signal. The digital informationcan be passed to and from the host processor using either a remote I/O(RIO) or an RS-232C port.A Smart Transmitter Interface consists of one Communications Controller(1770-HT1), and one or more Terminal Blocks (1770-HT8 or 1770-HT16).These products can be mounted on a DIN rail in a control cabinet and thefield wiring brought directly to the Terminal Blocks.1770 HT1 Communications ControllerThe 1770-HT1 Communications Controller receives commands from ahost processor and passes them on, via the 1770-HT8/16 Terminal Blocks,to HART field devices. Responses from the HART field devices gothrough the Terminal Blocks to the Communications Controller and thenon to the host processor.The Communications Controller communicates through its Remote I/O orRS-232C port to the host processor. The combination of hardware andsoftware used by the host determines which port is used.Use the Remote I/O port (labelled RIO in Figure 1.1) with the following:a programmable controller as host processor using ladder logic toperform block transfer reads and writes. On the DH network theprogrammable controller can connect to a computer running softwareapplications, such as ControlView, to monitor and supervise the ongoingprocesses.1-1
Chapter 1Introducing the Smart TransmitterInterfacea programmable controller with Allen-Bradley’s pass-throughfunctionality connected to a host computer on the DH network runningapplication software to initiate communicationsUse the RS-232C port (labelled RS-232 in Figure 1.1) with the following:a host computer using Allen-Bradley DF1 protocol, connected to theCommunications Controller by an RS-232 cable (if the distance is lessthan 50 feet)a host computer using Allen-Bradley DF1 protocol, connected to theCommunications Controller by telephone lines and modemsThe Communications Controller requires an external 24 VDC powersupply. It provides a multiplexed, 32 channel interface to the TerminalBlocks. All of the Remote I/O and RS-232C communications parametersare set on the Communications Controller using push buttons and a sevensegment LED display.Figure 1.11770 HT1 Communications ControllerRS-232CConnectorConnector to Terminal Block(s)RIO - ConnectorParameter #ParameterSettingPower ConnectorStatus LEDsPower Fuse1RS-2321 SH 2RIOOPTIONPOWERDATASMART TRANSMITTERCOMMUNICATIONSCONTROLLER 24 VDCRIORS-232HT8/HT16 INTERCONNECTHARTFAULTOPTNVIEWDATAEXITSAVEPush Button DATA177-Segment LEDDisplayUser writeableareas90002
Chapter 1Introducing the Smart TransmitterInterface1770 HT8/16 Terminal BlockThe Terminal Blocks pass both analog and digital signals to and from theHART field devices. The analog signal is passed on to devices such as theAllen-Bradley 1771-IFE Analog I/O module. The digital signal is routed tothe Communications Controller.Each Terminal Block provides either 8 (1770-HT8) or 16 (1770-HT16)channels. Each channel has connection points for HART field devices andAnalog I/O modules, loop fuses and loop power selection jumpers. Anycombination of 8 and 16 channel Terminal Blocks can be used to make upthe 32 channel maximum. The board address jumpers (see Figure 1.2 andFigure 1.3) indicate to the Communications Controller which set ofchannels a particular Terminal Block will use. These are set when theTerminal Block is installed (see Chapter 2).Figure 1.21770 HT8 8 Channel Terminal BlockConnection to CommunicationsController or other Terminal BlocksLoopPowerLEDAnalog I/O ModuleConnector1HT1/HT8/HT16 INTERCONNECTBoard Selected LEDBoard AddressJumpers8 CHANNELTERMINAL BLOCK12345678Power Fuse Power Connector Loop PowerRTN SHCATALOG NO. 1770-HT8 VOLTS 24 VDCEJP1DEJP1CH 1CH 21 2 SH1 2 SHD EJP1CH 31 2 SHD EJP1CH 41 2 SHD EJP1DEJP1CH 5CH 61 2 SH1 2 SHD EJP1CH 71 2 SHD EJP1DCH 81 2 SH17User writeable areaJumpers to select Loop PowerHART Transmitters ConnectorsLoop Fuses900181-3
Chapter 1Introducing the Smart TransmitterInterfaceFigure 1.31770 HT16 16 Channel Terminal BlockConnection to CommunicationsController or other Terminal BlocksLoopPowerLEDAnalog I/O ModuleConnector1HT1/HT8/HT16 INTERCONNECTBoard Selected LEDBoard AddressJumpers8 CHANNELTERMINAL BLOCK12345678RTN SH12345678Power ConnectorPower Fuse Loop PowerRTN SHCATALOG NO. 1770-HT8 VOLTS 24 VDCEJP1DEJP1CH 1CH 21 2 SH1 2 SHD EJP1CH 31 2 SHD EJP1CH 41 2 SHD EJP1D EJP1DECH 5CH 61 2 SH1 2 SHJP1CH 71 2 SHD EJP1CH 81 2 SHDEJP1JP1DECH 11 2 SHD EJP1D EJP1D EJP1D EJP1CH 2CH 3CH 4CH 5CH 61 2 SH1 2 SH1 2 SH1 2 SH1 2 SHD EJP1CH 71 2 SHD EJP1DCH 81 2 SH17User writeable areaJumpers to select Loop PowerHART Transmitters ConnectorsLoop Fuses90017The Remote I/O Port of the Communications ControllerProgrammable Controller Host CommunicationsUsing programmable controller ladder logic to initiate Block TransferWrites and Reads (BTW and BTR), data can be sent to and received fromthe HART field devices. A host computer on the DH network runningapplication programs (such as ControlView) can read and display the datawhich the programmable controller has obtained from the HART fielddevices. (See Figure 1.4)1-4
Chapter 1Introducing the Smart TransmitterInterfaceFigure 1.4Smart Transmitter Interface with Programmable Controller HostCONTROLVIEWDH RIOProgrammableController withLadder 2DH Host Communications (Using Programmable ControllerPass-through)Data can also be sent to and received from HART field devices using thepass-through feature of the programmable controller to initiate BlockTransfer Reads and Writes (BTR and BTW). No dedicated programmablecontroller ladder logic programs are required when the pass-throughfeature is used. A host computer on the DH network, running programswith pass-through support, can be used to communicate with the HARTfield devices.Figure 1.5Smart Transmitter Interface with DH Host(Using Pass through)THIRDPARTYSOFTWAREDH RIOProgrammableController withPass vices90033The RS 232C Port of the Communications ControllerThe RS-232C port on the Communications Controller allows the HARTfield devices to communicate with either a local host or, via modem, aremote host.1-5
Chapter 1Introducing the Smart TransmitterInterfaceFull Duplex CommunicationsWith DF1 full duplex systems, you can communicate directly to a singleSmart Transmitter Interface. No programmable controllers arenecessary—just a computer running the appropriate software, the HARTfield devices, and the Smart Transmitter Interface between them. The hostcomputer and the Smart Transmitter Interface should be connected
compatible with HART field devices and with hand-held terminals capable of supporting the physical and data link layers of the HART protocol. This manual uses the following terms as defined below. Actuator: any one of several field devices that provide control functions using a 4-20mA input control signal. Actuators that support the HART
Connecting a HART modem The transmitter can be linked to a PC via the HART modem. The modem can be supplied to special order, at extra cost: Sales No. 40/00345666 Connecting a HART communicator - up to 15 transmitters (multidrop) Transmitter dTRANS T01 HART modem RS232 PC or notebook Supply 10—35V DC Burden (U - 10V) / 0.022A
Chuck Cawthon Paraprofessional ccawthon@hart.k12.ga.us Sonia Cobb Director of Alternative Program scobb@hart.k12.ga.us TeacherVicky Hardyvhardy@hart.k12.ga.us Guidance Susan Carman Counselor susan.carman@hart.k12.ga.us HCCA CounselorClaudette Gillespieclaudette.gillespie@hart.k12.ga.us Paul Griffith Lead Counselor pgriffith@hart.k12.ga.us
HART I/O module The ControlLogix HART analog I/O module converts to or from 4.20 mA analog signals and the digital values used in the ControlLogix controller. The I/O module automatically collects dynamic process data from the HART field instrument. The I/O module also bridges HART messages from CIP clients to HART field instruments.
HART I/O module The ControlLogix HART analog I/O module converts to or from 4.20 mA analog signals and the digital values used in the ControlLogix controller. The I/O module automatically collects dynamic process data from the HART field instrument. The I/O module also bridges HART messages from CIP clients to HART field instruments.
Accessori Unità di programmazione Modem VIATOR HART Modello PU-H Fig. sinistra: VIATOR HART USB Fig. centrale: VIATOR HART USB PowerXpress Fig. destra: VIATOR HART RS-232 Applicazioni Modem HART
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The Intelligent Transmitter/0 to 20 mA Output Interface Module contains four Intelligent Transmitter interface channels and four 20 mA dc analog output channels. The module is a main type and . The Intelligent Transmitter interface portion of the module is a transmitter host, thus enabling the system to receive digital messages from the
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