Rockwell-automation 1746-NI8 SLC 500 Analog Input Modules User Manual Manual de usuario Pagina 1

UserManualSLC 500tAnalogInput Module(Cat. No. 1746NI8)AllenBradley

PrefaceP–4Publication 17466.8 - April 1997The following conventions are used throughout this manual:• Bulleted lists such as this one provide inform

Chapter 1Publication 17466.8 - April 1997OverviewThis chapter describes the 1746-NI8 analog input module andexplains how the SLC 500t processor gath

1–2OverviewPublication 17466.8 - April 1997Important: Status words are only available when the module isconfigured for Class 3.Hardware FeaturesThe

1–3OverviewPublication 17466.8 - April 1997General Diagnostic FeaturesThe 1746-NI8 module contains diagnostic features that can help youidentify the

1–4OverviewPublication 17466.8 - April 1997The SLC processor reads the converted analog data from the moduleat the end of the program scan, or when

Chapter 2Publication 17466.8 - April 1997Quick Startfor Experienced UsersThis chapter can help you to get started using the 1746-NI8 analoginput mod

2–2Quick StartPublication 17466.8 - April 19971.Check the contents of shipping box.ReferenceUnpack the shipping box making sure that the contents in

2–3Quick StartPublication 17466.8 - April 19974.Insert the 1746NI8 module into the chassis.ReferenceATTENTION: Never install, remove, or wiremodul

2–4Quick StartPublication 17466.8 - April 19976.Configure the system.ReferenceConfigure your system I/O for the particular slot the 1746NI8 is in (

2–5Quick StartPublication 17466.8 - April 19971746NI8 Module Output Image - Channel ConfigurationClass 1 Class 3O:1.0 channel 0 configuration word

Because of the variety of uses for the products described in thispublication, those responsible for the application and use of thiscontrol equipment m

2–6Quick StartPublication 17466.8 - April 19979.Write the ladder program.ReferenceWrite the remainder of the ladder logic program that specifies how

2–7Quick StartPublication 17466.8 - April 199711.Check that the module is operating correctly.Reference(Optional) If the Module Status LED is off, o

Chapter 3Publication 17466.8 - April 1997Installation and WiringThis chapter tells you how to:•avoid electrostatic damage•determine the chassis powe

••••••••••••••••••••••••∇∇IA4IA8IA16IM4IM8IM16OA8OAP12OA16IB8IB16IC16ITB16ITV16IV8IV16IG16OV8OV16OB8OBP8OBP16OVP16OG16OW4OW8OW16IO4IO8IO12NI4NI8NIO4IF

3–3Installation and WiringPublication 17466.8 - April 1997General ConsiderationsMost applications require installation in an industrial enclosure to

3–4Installation and WiringPublication 17466.8 - April 1997When installing the module in a chassis, it is not necessary to removethe terminal block f

3–5Installation and WiringPublication 17466.8 - April 1997Module Installation Procedure1. Align the circuit board of the analog input module with th

3–6Installation and WiringPublication 17466.8 - April 1997Module Removal Procedure1. Press the releases at the top and bottom of the module and slid

3–7Installation and WiringPublication 17466.8 - April 1997Wiring SingleEnded and Differential InputsThe diagram below shows typical wiring for the

3–8Installation and WiringPublication 17466.8 - April 1997Wiring Schematic for Singleended Analog Input ConnectionsTransmitter+TransmitterSupply Si

Important User Information -1. . . . . . . . . . . . . . . . . . . . . . . . Preface P-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–9Installation and WiringPublication 17466.8 - April 1997Wiring Guidelines!ATTENTION: To prevent shock hazard, care shouldbe taken when wiring the

3–10Installation and WiringPublication 17466.8 - April 1997Wiring Input Devices to the 1746NI8After the analog input module is properly installed i

Chapter 4Publication 17466.8 - April 1997Preliminary OperatingConsiderationsThis chapter explains how the analog input module and the SLC 500process

4–2Preliminary Operating ConsiderationsPublication 17466.8 - April 1997The 1746-NI8 analog input module has multiclass interfacecapabilities. Class

4–3Preliminary Operating ConsiderationsPublication 17466.8 - April 1997Class 3 Memory MapChannel 0 Configuration WordChannel 1 Configuration WordCha

4–4Preliminary Operating ConsiderationsPublication 17466.8 - April 1997Example – If you want to configure channel 2 on the analog modulelocated in s

4–5Preliminary Operating ConsiderationsPublication 17466.8 - April 1997The module update time is defined as the time required for themodule to sampl

4–6Preliminary Operating ConsiderationsPublication 17466.8 - April 1997The table below gives you the turn-on, turn-off, and reconfigurationtimes for

4–77Preliminary Operating ConsiderationsPublication 17466.8 - April 1997The module uses a digital low pass filter that provides noise rejectionfor t

4–8Preliminary Operating ConsiderationsPublication 17466.8 - April 1997The cut-off frequency for each input channel is defined by its filterfrequenc

Table of ContentsiiTerminal Wiring 3-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Terminal Block 3-6. . . . . . . .

4–9Preliminary Operating ConsiderationsPublication 17466.8 - April 1997The graph below shows the aliasing characteristic at a filterfrequency of 10

4–10Preliminary Operating ConsiderationsPublication 17466.8 - April 1997Noise RejectionRejection of common mode noise is inherent in the hardware de

Chapter 5Publication 17466.8 - April 1997Channel Configuration, Data,and StatusThis chapter examines the channel configuration word and thechannel s

5–2Channel Configuration, Data, and StatusPublication 17466.8 - April 1997The channel configuration word consists of bit fields, the settings ofwhic

5–3Channel Configuration, Data, and StatusPublication 17466.8 - April 1997Select Input Type (Bits 0-2)The input type bit field lets you configure th

5–4 Channel Configuration, Data, and StatusPublication 17466.8 - April 1997Important:The processor may continue receiving data values for aperiod of

5–5Channel Configuration, Data, and StatusPublication 17466.8 - April 1997While the channel enable bit is cleared (0), the channel data wordand stat

5–6Channel Configuration, Data, and StatusPublication 17466.8 - April 1997Channel Data Word Values for Scaled DataInput Type Signal Range Scaledfor

5–7Channel Configuration, Data, and StatusPublication 17466.8 - April 1997Voltage/Current Range Resolutionper LSBNumber ofSignificant BitsDecimalRep

5–8 Channel Configuration, Data, and StatusPublication 17466.8 - April 1997Scaling ExamplesThe following scaling examples show how to convert the ch

Table of Contents iiiUser Defined Limits Data Format to Real" Units 5-10. . . . . . . . . . . . . . Channel Status Checking 5-11. . . . . .

5–9Channel Configuration, Data, and StatusPublication 17466.8 - April 1997Scaled-for-PID to “Real” UnitsSituation: A transducer is being used to mea

5–10 Channel Configuration, Data, and StatusPublication 17466.8 - April 19971746-NI4 Data Format Units to “Real” UnitsSituation: A transducer is bei

5–11Channel Configuration, Data, and StatusPublication 17466.8 - April 1997If the module is in Class 3 mode, there are an additional 8 inputimage wo

5–12Channel Configuration, Data, and StatusPublication 17466.8 - April 1997Channel 0-7 Status Word (I:e.8 through I:e.15) - Bit DefinitionsBit(s)Def

5–13Channel Configuration, Data, and StatusPublication 17466.8 - April 1997Explanations of the status conditions follow.Input Type Status (Bits 0-2)

5–14Channel Configuration, Data, and StatusPublication 17466.8 - April 1997Open Circuit Error (Bit 12)The open circuit error bit is set (1) whenever

Chapter 6Publication 17466.8 - April 1997Ladder Logic ConfigurationExamplesEarlier chapters explained how the configuration word defines theway a ch

6–2Ladder Logic Configuration ExamplesPublication 17466.8 - April 1997Procedure1. Create integer file N10. Integer file N10 should contain eightele

6–3Ladder Logic Configuration ExamplesPublication 17466.8 - April 1997The analog input module was designed to interface directly to theSLC 5/02t or

6–4Ladder Logic Configuration ExamplesPublication 17466.8 - April 1997This example shows how you could monitor the open circuit errorbits of each ch

Table of ContentsivChannel Configuration Worksheet (With Settings Established for Channels 0-4) 8-6. . . . . . . . . . . Program Set Up and Operatio

Chapter 7Publication 17466.8 - April 1997Module Diagnostics andTroubleshootingThis chapter describes troubleshooting using the channel statusLEDs as

7–2Module Diagnostics and TroubleshootingPublication 17466.8 - April 1997A failure of any channel diagnostic test causes the faulted channelstatus L

7–3Module Diagnostics and TroubleshootingPublication 17466.8 - April 1997Channel Status LEDs (Green)The channel status LED is used to indicate chann

7–4Module Diagnostics and TroubleshootingPublication 17466.8 - April 1997Module Status LED (Green)The module status LED is used to indicate module-r

7–5Module Diagnostics and TroubleshootingPublication 17466.8 - April 1997EndCheck LEDson module.ModuleChannel blinkingModule faultconditionNormal mo

7–6Module Diagnostics and TroubleshootingPublication 17466.8 - April 1997The 1746-NI8 module has the following replaceable parts:Part Part NumberRep

Chapter 8Publication 17466.8 - April 1997Application ExamplesThis chapter provides two application examples to help you use theanalog input module.

8–2Application ExamplesPublication 17466.8 - April 1997Channel ConfigurationConfigure channel 0 of the 1746-NI8 module with the followingsetup:• 4–2

8–3Application ExamplesPublication 17466.8 - April 1997Program ListingTO BCDSource N7:00<Dest N7:10000h <Scale w/ParametersInput I:3.00<Inp

8–4Application ExamplesPublication 17466.8 - April 1997Application Setup - Display Amps, PSI, and Liquid LevelThis example shows how to display curr

Publication 17466.8 - April 1997PrefaceRead this preface to familiarize yourself with the rest of the manual.This preface covers the following topics

8–5Application ExamplesPublication 17466.8 - April 1997Channel ConfigurationConfiguration setup for current transducers:• channels 0, 1, and 2• 4–20

8–6Application ExamplesPublication 17466.8 - April 1997Channel Configuration Worksheet (With Settings Established for Channels 0-4)•Input Type• Data

8–7Application ExamplesPublication 17466.8 - April 1997Program Set Up and Operation Summary1. Set up one configuration word in memory for each chann

8–8Application ExamplesPublication 17466.8 - April 1997Program ListingThe first rung of this program sends the channel setup information tothe 1746-

8–9Application ExamplesPublication 17466.8 - April 1997Scale w/ParametersInput I:1.30<Input Min.35003500 <Input Max.2050020500 <Scaled Min.

8–10Application ExamplesPublication 17466.8 - April 1997Scale w/ParametersInput I:1.40<Input Min.35003500 <Input Max.2050020500 <Scaled Min

Appendix APublication 17466.8 - April 1997SpecificationsThis appendix lists the specifications for the 1746-NI8 Analog InputModule.Description Spec

Variable Content TTL:ChapA–2Publication 17466.8 - April 1997Description SpecificationOperating Temperature0°C to 55°C (32°F to 131°F) in any slot exc

Appendix BPublication 17466.8 - April 1997Configuration WorksheetThe following worksheet is provided to help you configure each ofthe channels on y

Appendix CPublication 17466.8 - April 1997Converting from 1746NI4 to1746NI8This information is provided for those who are replacing two1746-NI4 m

PrefaceP–2Publication 17466.8 - April 1997Contents of this ManualChapter Title ContentPrefaceDescribes the purpose, background, and scope ofthis man

Variable Content TTL:ChapC–2Publication 17466.8 - April 1997Addressing is changed from two modules with 4 channels to onemodule with 8 channels. The

Variable Content TTL:ChapC–3Publication 17466.8 - April 1997For the 1746-NI4, input selection (voltage or current) is made via aswitch. For the 1746

Appendix DPublication 17466.8 - April 1997Two's Complement BinaryNumbersThe SLC 500 processor memory stores 16-bit binary numbers.Two’s comple

Variable Content TTL:ChapD–2Publication 17466.8 - April 1997Negative Decimal ValuesIn two’s complement notation, the far left position is always 1 fo

Publication 17466.8 - April 1997GlossaryThe following terms and abbreviations are used throughout thismanual. For definitions of terms not listed her

GlossaryG–2Publication 17466.8 - April 1997dB - (decibel) A logarithmic measure of the ratio of two signallevels.data word - A 16-bit integer that re

Glossary G–3Publication 17466.8 - April 1997normal mode rejection - (differential mode rejection) A logarithmicmeasure, in dB, of a device’s ability

Symbols-3 dB frequency. See filter frequencyAA/Dconverter, 1-4definition, G-1value in data word, 5-3abbreviations, G-1addressing, 4-21746

IndexI–2Ddata type descriptions, 5-6data word, 4-4addressing, 4-4converting to other units, 5-6definition, G-2module input image, 2-

IndexI–3input image, 2-6See also status word and data worddefinition, G-2input response to slot disabling, 4-6input specifications, A-2inpu

Preface P–3Publication 17466.8 - April 1997Related DocumentationThe following documents contain information that may be helpful toyou as you use All

IndexI–4Sscaled-for-PID, 5-6scaling, definition, G-3scaling input data. See input data scalingscan time, G-2self-locking tabs, 1-2shield co

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