Rockwell-automation 1746-NR8 SLC 500 RTD/Resistance Input Module User Manual de usuario

SLC 500™RTD/Resistance Input Module(Catalog Number 1746-NR8)User Manual

Publication 1746-UM003A-EN-PPreface 4

Publication 1746-UM003A-EN-P 7-8 Application ExamplesTable 7.5 Data TableENDTO BCDSource I:1.5Dest O:8.0TODTO BCDSource I:1.6Dest O:9.0TODTO BC

1 Publication 1746-UM003A-EN-P Appendix ASpecificationsThis appendix lists the specifications for the 1746-NR8 RTD Input Module.Electrical Specificati

Publication 1746-UM003A-EN-P A-2 SpecificationsEnvironmental SpecificationsInput SpecificationsOperating Temperature 0°C to +60°C (+32°F to +14

Publication 1746-UM003A-EN-P Specifications A-3Module AccuracyRTD Temperature Ranges, Resolution, and RepeatabilityInput Type Temp. Range(0.25

Publication 1746-UM003A-EN-P A-4 SpecificationsRTD Accuracy and Temperature Drift SpecificationsInput Type 0.25 mA Excitation 1.0 mA Excitation

Publication 1746-UM003A-EN-P Specifications A-5Resistance Device CompatibilityTable A.1 Resistance Input SpecificationsCable SpecificationsRTD

Publication 1746-UM003A-EN-P A-6 Specifications

1 Publication 1746-UM003A-EN-P Appendix BConfiguration Worksheet for RTD/Resistance Module See Chapter 4 for worksheet procedure.11121415 13 910 8 674

Publication 1746-UM003A-EN-P B-2 Configuration Worksheet for RTD/Resistance Module

1 Publication 1746-UM003A-EN-P GlossaryThe following terms and abbreviations are specific to this product. For a complete listing of Allen-Bradley ter

1 Publication 1746-UM003A-EN-PChapter 1OverviewThis chapter describes the 8-channel 1746-NR8 RTD/Resistance Input 1746-NR8 RTD/Resistance Input 1746-N

Publication 1746-UM003A-EN-P Glossary 2excitation currentexcitation currentexcitation currentexcitation current - A user-selectable current (0.

Publication 1746-UM003A-EN-P Glossary 3resolution resolution resolution resolution - The smallest detectable change in a measurement, typically

Publication 1746-UM003A-EN-P Glossary 4

Publication 1746-UM003A-EN-P IndexAA/D G-1abbreviations G-1addressingconfiguration word 3-4addressing example 3-4data wordaddressing example 3-5status

Publication 1746-UM003A-EN-P ii Indexspecifications A-2Ffilter frequency G-2bit description in configuration word 4-17bit description in status

Publication 1746-UM003A-EN-P Index iiiRremote configuration G-3removable terminal block 1-6removing the module 2-7removing the terminal block 2

Publication 1746-UM003A-EN-P iv Index

Back Cover

Publication 1746-UM003A-EN-P - June 2000 2© 2000 Rockwell International Corporation. Printed in the U.S.A.

Publication 1746-UM003A-EN-P1-2 OverviewFigure 1.1 Simplified RTD Module CircuitConstant Current SourceRTD ModuleBackplaneDigital DataDigital D

Publication 1746-UM003A-EN-POverview 1-3RTD CompatibilityThe following table lists the RTD types used with the RTD module and gives each type’s

Publication 1746-UM003A-EN-P1-4 OverviewTable 1.2 RTD Accuracy and Temperature Drift SpecificationsInput Type 0.25 mA Excitation 1.0 mA Excitat

Publication 1746-UM003A-EN-POverview 1-5Resistance Device CompatibilityThe table below lists the resistance input types you can use with the RT

Publication 1746-UM003A-EN-P1-6 OverviewFigure 1.2 RTD Module HardwareTable 1.4 Hardware FeaturesGeneral Diagnostic FeaturesThe RTD module cont

Publication 1746-UM003A-EN-POverview 1-7System OverviewFigure 1.3 RTD ConfigurationEach individual channel on the RTD module can receive input

Publication 1746-UM003A-EN-P1-8 OverviewPower-upAt power-up, the RTD module checks its internal circuits, memory, and basic functions via hardw

Publication 1746-UM003A-EN-POverview 1-9Figure 1.4 LED IndicatorsThe purpose of the LEDs is as follows:• Channel Status - One LED for each of t

Important User InformationBecause of the variety of uses for the products described in this publication, those responsible for the application and use

Publication 1746-UM003A-EN-P1-10 OverviewModule to Processor CommunicationAs shown in the following illustration, the RTD module communicates w

1 Publication 1746-UM003A-EN-PChapter 2Installation and WiringThis chapter tells you how to:• comply to European union directives• avoid electrostatic

Publication 1746-UM003A-EN-P2-2 Installation and WiringSafety ConsiderationsElectrostatic DamageElectrostatic discharge can damage semiconducto

Publication 1746-UM003A-EN-P Installation and Wiring 2-3Power RequirementsThe RTD module receives its power through the SLC500 chassis backplan

Publication 1746-UM003A-EN-P2-4 Installation and WiringModule Location in ChassisModular Chassis ConsiderationsPlace your RTD module in any slo

Publication 1746-UM003A-EN-P Installation and Wiring 2-5General ConsiderationsMost applications require installation in an industrial enclosure

Publication 1746-UM003A-EN-P2-6 Installation and WiringRemoving the Terminal Block1.1.1.1. Loosen the two terminal block release screws.2.2.2.2

Publication 1746-UM003A-EN-P Installation and Wiring 2-7Installing the Module1.1.1.1. Align the circuit board of the RTD module with the card g

Publication 1746-UM003A-EN-P2-8 Installation and WiringTerminal WiringFigure 2.1 Terminal BlockWiring ConsiderationsFollow the guidelines below

Publication 1746-UM003A-EN-P Installation and Wiring 2-9For a 3-wire configuration, the module can compensate for a maximum cable length associ

i Publication 1746-UM003A-EN-P Table of ContentsPrefaceWho Should Use This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . P-1Purpose

Publication 1746-UM003A-EN-P2-10 Installation and WiringFigure 2.2 RTD Connections to Terminal BlockWhen using a 3-wire configuration, the modu

Publication 1746-UM003A-EN-P Installation and Wiring 2-11There are several ways to insure that the lead values match as closely as possible. Th

Publication 1746-UM003A-EN-P2-12 Installation and WiringFigure 2.3 2-Wire Potentiometer Connections to Terminal BlockFor details on wiring a po

Publication 1746-UM003A-EN-P Installation and Wiring 2-13Figure 2.4 3-Wire Potentiometer Connections to Terminal BlockFor details on wiring a p

Publication 1746-UM003A-EN-P2-14 Installation and WiringWiring Input Devices to the ModuleTo wire your 1746-NR8 module, follow these steps as s

Publication 1746-UM003A-EN-P Installation and Wiring 2-15CalibrationThe accuracy of a system that uses the RTD module is determined by the foll

Publication 1746-UM003A-EN-P2-16 Installation and WiringAn autocalibration programming example is provided on page 5-10. Single-Point Calibrati

1 Publication 1746-UM003A-EN-P Chapter 3Preliminary Operating ConsiderationsThis chapter explains how the RTD module and the SLC processor communicate

Publication 1746-UM003A-EN-P 3-2 Preliminary Operating ConsiderationsModule AddressingThe memory map shown in the following illustration displa

Publication 1746-UM003A-EN-P Preliminary Operating Considerations 3-3Figure 3.2 Class 3 Memory MapChannel 0 Configuration WordChannel 1 Configu

Publication 1746-UM003A-EN-P Table of Contents iiChapter 3Preliminary Operating ConsiderationsModule ID Code. . . . . . . . . . . . . . . . . .

Publication 1746-UM003A-EN-P 3-4 Preliminary Operating ConsiderationsOutput Image - Configuration WordsThe RTD module output image (defined as

Publication 1746-UM003A-EN-P Preliminary Operating Considerations 3-5Example - To obtain the status of channel 2 (input word 6) of the RTD modu

Publication 1746-UM003A-EN-P 3-6 Preliminary Operating ConsiderationsEffective ResolutionThe effective resolution for an input channel depends

Publication 1746-UM003A-EN-P Preliminary Operating Considerations 3-7Channel Cut-Off FrequencyThe channel filter frequency selection determines

Publication 1746-UM003A-EN-P 3-8 Preliminary Operating ConsiderationsFigure 3.4 50/60 Hz Filter Frequency ResponseFigure 3.5 800 Hz Filter Freq

Publication 1746-UM003A-EN-P Preliminary Operating Considerations 3-9Figure 3.6 6400 Hz Filter Frequency ResponseThis section shows how to dete

Publication 1746-UM003A-EN-P 3-10 Preliminary Operating ConsiderationsChannel AutocalibrationUpon entry into the channel enabled state, the mod

Publication 1746-UM003A-EN-P Preliminary Operating Considerations 3-11Figure 3.7 Scanning CycleChannel 1 Channel 0StartUpdate Channel 1 Data Wo

Publication 1746-UM003A-EN-P 3-12 Preliminary Operating ConsiderationsThe table below gives you the turn-on, turn-off, and reconfiguration time

1 Publication 1746-UM003A-EN-P Chapter 4Channel Configuration, Data, and StatusThis chapter examines the channel configuration word and the channel st

Publication 1746-UM003A-EN-P Table of Contents iiiChapter 5Ladder Programming ExamplesDevice Configuration . . . . . . . . . . . . . . . . . .

Publication 1746-UM003A-EN-P4-2 Channel Configuration, Data, and StatusFigure 4.1 Module Output Image (Configuration Word)Channel 0 Configurati

Publication 1746-UM003A-EN-P Channel Configuration, Data, and Status 4-3Module default settings for configuration words 0 through 7 are all zer

Publication 1746-UM003A-EN-P4-4 Channel Configuration, Data, and Status5.5.5.5. Determine the desired input filter frequency for the channel an

Publication 1746-UM003A-EN-P Channel Configuration, Data, and Status 4-5Table 4.1 Channel Configuration Word (O:e.0 through O:e.7) - Bit Defini

Publication 1746-UM003A-EN-P4-6 Channel Configuration, Data, and StatusInput Type Selection (Bits 0 through 3)The input type bit field lets you

Publication 1746-UM003A-EN-P Channel Configuration, Data, and Status 4-7Default scaling can be selected for scaled-for-PID data format and prop

Publication 1746-UM003A-EN-P4-8 Channel Configuration, Data, and StatusProportional Counts Data Format - If the user selects proportional count

Publication 1746-UM003A-EN-P Channel Configuration, Data, and Status 4-9User-Set ScalingProportional Counts - If the user wants to configure th

Publication 1746-UM003A-EN-P4-10 Channel Configuration, Data, and StatusConfiguration Words For User-set Scaling (Words 8 to 23)The following i

Publication 1746-UM003A-EN-P Channel Configuration, Data, and Status 4-11Scaling ExamplesThe following examples are using the default scaling r

Publication 1746-UM003A-EN-P Table of Contents ivAppendix BConfiguration Worksheet for RTD/Resistance ModuleGlossaryIndex

Publication 1746-UM003A-EN-P4-12 Channel Configuration, Data, and StatusProportional Counts to Engineering Units Equation:Assume that input typ

Publication 1746-UM003A-EN-P Channel Configuration, Data, and Status 4-13Table 4.3 Data Formats for RTD Temperature Ranges for 0.25 and 1.0 mA

Publication 1746-UM003A-EN-P4-14 Channel Configuration, Data, and StatusThe following tables show the resistance ranges provided by the 1746-NR

Publication 1746-UM003A-EN-P Channel Configuration, Data, and Status 4-15Table 4.13 Channel Data Word Resolution for 500ΩΩΩΩ Platinum (385)Tabl

Publication 1746-UM003A-EN-P4-16 Channel Configuration, Data, and StatusThe following two tables show the data resolution provided by the 1746-

Publication 1746-UM003A-EN-P Channel Configuration, Data, and Status 4-17Temperature Units Selection (Bit 8)The following table shows the descr

Publication 1746-UM003A-EN-P4-18 Channel Configuration, Data, and StatusWhile the channel enable bit is cleared (0), the channel data word and

Publication 1746-UM003A-EN-P Channel Configuration, Data, and Status 4-19Channel Data WordThe actual RTD or resistance input sensor values resi

Publication 1746-UM003A-EN-P4-20 Channel Configuration, Data, and StatusFigure 4.7 Module Input Image (Status Word)The channel status word can

Publication 1746-UM003A-EN-P Channel Configuration, Data, and Status 4-21Table 4.25 Channel 0 through 7 Status Word (I:e.8 through I:e.15) - Bi

1 Publication 1746-UM003A-EN-PPrefaceRead this preface to familiarize yourself with the rest of the manual. This preface covers the following topics:•

Publication 1746-UM003A-EN-P4-22 Channel Configuration, Data, and StatusExplanations of the status conditions follow. Input Type Status (Bits 0

Publication 1746-UM003A-EN-P Channel Configuration, Data, and Status 4-23Channel Filter Frequency (Bits 9 and 10) The channel filter frequency

Publication 1746-UM003A-EN-P4-24 Channel Configuration, Data, and StatusOut-Of-Range Error (Bit 14)This bit is set (1) whenever a configured ch

1 Publication 1746-UM003A-EN-P Chapter 5Ladder Programming ExamplesEarlier chapters explained how the configuration word defines the way a channel ope

Publication 1746-UM003A-EN-P 5-2 Ladder Programming ExamplesInitial ProgrammingTo enter data into the channel configuration word (O:e.0 through

Publication 1746-UM003A-EN-P Ladder Programming Examples 5-3This example transfers configuration data and sets the channel enable bits of all e

Publication 1746-UM003A-EN-P 5-4 Ladder Programming ExamplesDynamic ProgrammingThe ladder below explains how to change data in the channel conf

Publication 1746-UM003A-EN-P Ladder Programming Examples 5-5Figure 5.5 Program to Verify Configuration Word Data ChangesInterfacing to the PID

Publication 1746-UM003A-EN-P 5-6 Ladder Programming ExamplesFigure 5.6 Programming for PID ApplicationATTENTION!!!!When using the module’s scal

Publication 1746-UM003A-EN-P Ladder Programming Examples 5-7Using the Proportional Counts Data Format with the User-set Scaling (Class 3)The RT

Publication 1746-UM003A-EN-PPreface 2Related DocumentationThe following documents contain information that may be helpful to you as you use All

Publication 1746-UM003A-EN-P 5-8 Ladder Programming ExamplesTable 5.1 Data Table (Class 3)Monitoring Channel Status BitsThe following illustrat

Publication 1746-UM003A-EN-P Ladder Programming Examples 5-9Figure 5.8 Programming to Monitor Channel StatusFirst PassS:115COPCopy FileSourceDe

Publication 1746-UM003A-EN-P 5-10 Ladder Programming ExamplesInvoking AutocalibrationAutocalibration occurs whenever:• power is provided to the

Publication 1746-UM003A-EN-P Ladder Programming Examples 5-11ExampleExampleExampleExample - Command the RTD module to perform an autocalibratio

Publication 1746-UM003A-EN-P 5-12 Ladder Programming Examples

1 Publication 1746-UM003A-EN-P Chapter 6Module Diagnostics and TroubleshootingThis chapter describes troubleshooting using the channel status LEDs as

Publication 1746-UM003A-EN-P 6-2 Module Diagnostics and TroubleshootingPower-Up DiagnosticsAt module power-up, a series of internal diagnostic

Publication 1746-UM003A-EN-P Module Diagnostics and Troubleshooting 6-3The following tables explain the function of the channel status LEDs whi

Publication 1746-UM003A-EN-P 6-4 Module Diagnostics and TroubleshootingChannel Status LEDs (Green)The channel LED is used to indicate channel s

Publication 1746-UM003A-EN-P Module Diagnostics and Troubleshooting 6-5If an open- or short-circuit is detected, the channel data word reflects

Publication 1746-UM003A-EN-P Preface 3Common Techniques Used in this ManualThe following conventions are used throughout this manual:• Bulleted

Publication 1746-UM003A-EN-P 6-6 Module Diagnostics and TroubleshootingFigure 6.2 Troubleshooting FlowchartCheck LEDs on module.Module Status L

Publication 1746-UM003A-EN-P Module Diagnostics and Troubleshooting 6-7Replacement PartsThe RTD module has the following replaceable parts:Tabl

Publication 1746-UM003A-EN-P 6-8 Module Diagnostics and Troubleshooting

1 Publication 1746-UM003A-EN-P Chapter 7Application ExamplesThis chapter provides two application examples to help you use the RTD input module. They

Publication 1746-UM003A-EN-P 7-2 Application ExamplesTable 7.1 Channel Configuration Worksheet (With Settings Established for Channel 0)Program

Publication 1746-UM003A-EN-P Application Examples 7-3Figure 7.2 Program to Convert  F to BCDTable 7.2 Data TableSupplementary ExampleApplicati

Publication 1746-UM003A-EN-P 7-4 Application ExamplesFigure 7.3 Device Configuration for Displaying Many RTD InputsChannel Configuration(see co

Publication 1746-UM003A-EN-P Application Examples 7-5Configuration setup for bath RTD:• channels 1 and 5• 200Ω Platinum RTD (385)• display temp

Publication 1746-UM003A-EN-P 7-6 Application ExamplesProgram Setup and Operation Summary1.1.1.1. The alarms section of the ladder program monit

Publication 1746-UM003A-EN-P Application Examples 7-7Figure 7.4 Program to Display Data On LEDs 0] [I:2.0OSRB30COPCOPY FILESource #N10:0Dest #O