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1. E E Controller IF8u Sample sele Controller Demo sael Tasks um B S Tasks T P UE B a Mani ast 1 Copy File a ay Mar 0 Copy File 58 MainProgram Source Locak3 Data 0 B am rogram Source FBU Config Program Tags Dest IFBU Input Program Tags Dest Locak3 C Datel En MainRoutine Length 92 Eh MainRoutine Length 73 Unscheduled Programs IFBU H E Motion Groups Motionauto G Trends DoReset ci Unscheduled Programs i Copy File col ype i H E Data Types Message H E Motion Groups Source Locak3 Data 0 140 Configuration Trends Dest IFBU Input 73 Data Types Length 92 1 0 Configuration DoReset 2 L 3 E j J Type Cll DoSevattrll Ms 3 Type Messe DoSetAttrAll 3 Type UL dni 4 Type CIP Message C Type Ladder Diagram Mein Type Ladder Diagram Description Description UL All 4 Type CIP Message C End 4 om Ee mal gt M SLE MainRoutine 4 Rirau A SET LN Ready Ready Rung End ofS APP VER 1 In your project right mouse click the MainRoutine item and select New Routine IF8u was entered in the example above 2 Double click on the MainRoutine item in the sample project and then double click on the added new routine in your project to display their corresponding ladder logic 3 Left mouse inside the MainPro
2. RTD In RTD Exc 2 EDL 5 In RTD In In RTD In 2 EDL 5 iRTN ilN In RTD In 2 E 6 RTD Exc iRTN ilN 2 DT 6In RTD In RTD Exc 3 EDL 6 In RTD In In RTD In 3 01 6 iRTN iN In RTD In 3 EDL RTD Exc iRTN ilN 3 DL 7 In RTD In CJC1 In DT 7 In RTD In CJC1 In DL 7 iRTN ilN U E Wiring Voltage Current Inputs the IF8u Module Chapter 2 Installing And Wiring Your Module 17 Voltage inputs use the terminal block pins labelled IN and IN Current inputs use the terminal block pins labelled IN and IN Voltage Inputs EXC O O O O CABLE SHIELD Current Inputs EXC ADD O JUMPER O IN iRTN O Current O Current CABLE SHIELD 18 ControlLogix Universal Analog Input Module Wiring RTD or Resistance Sensors to the IF8u Module The IF8u module supports two three and four wire RTDs or resistance inputs connected individually to the module as shown in the figure below 2 Wire RTD Interconnection 3 4ANre RTD Interconnection Note 4 wire s exactly like 3 wir with one wire lett open These are 2 wire RTDs which are composed of 2 RTD lead wires EXC and IN with a jumper between EXC and IN 3 wire RTDs which are composed of a 2 Signal and 1 RTD return lead wires EXC and IN with a the return RTD lead to IN 4 wire
3. Config Template Cg Strings e IFBU Input Template ii Predefined Gi Strings Cg Module Defined ia Predefined E 1 0 Configuration i Module Defined i 5 2 1 0 Configuration ChannelConfig ChannelStatus IF8u_Config_Template IF8u_Input_Template 1 Click on the data type 2 Drag it into your new project 3 Continue to drag and drop the data types until all four have been moved Note These can only be moved one at a time ControlLogix Universal Analog Input Module 3 e Drag and drop the controller configuration tags from the sample project into your project 8 2 a BY cae Favorites f 53 Controller Fault Handler D 3 Power Up Handler Ei UL AI E Aoi Motion Groups i MsgSetattributedl Jis XMAS i Trends 3 MsgReset FF Axis_xMAM2 9 63 3 7 EE Axis MAMIT amp C3 1 0 Configuration Axis_xMAJR T7 FRU Input Config Axis_sMAH DoSetattral FE Axis xMAFR a HH axis Autocycle Button Analog In ChO UL Ch Al UL All MsgSetAttributeAll MsgReset UL_Ch_Al1 UL Alf MsgSetAttributeAIl EF MsgReset FEHFBU Input 1 Right click on the Controller Tags item of the sam
4. Oo Metal sheath with electrical continuity to thermocouple signal wires 100 ControlLogix Universal Analog Input Module Exposed Junction Thermocouples As shown in the illustration that follows using exposed junction thermocouples may result in removal of channel to channel isolation This may occur if multiple exposed thermocouples are in direct contact with electrically conductive process material To prevent violation of channel to channel isolation e For multiple exposed thermocouples do not allow the measuring junction of the thermocouple to make direct contact with electrically conductive process material Useasingle exposed junction thermocouple with multiple ungrounded junction thermocouples e Use all ungrounded junction thermocouple instead of the exposed junction type 1756sc IF8u Conductive Material Exposed junction with shielded cable Module Installation Adding Your Module to a Project Appendix D Programming Your Module This chapter explains how program your module in the ControlLogix system It also describes how to the module s input configuration are incorporated into your ladder logic program Topics discussed include importing the module s configuration profile reviewing accessing and altering configuration options configuring the modules input type and filter settings configuring alarms and limits Incorporating your module into the system is similar t
5. 36 position press terminals When installing the module in a chassis it is not necessary to remove the terminal blocks from the module However if the terminal blocks are removed use the write on label located on the side of the terminal blocks to identify the module location and type Chapter 2 Installing And Wiring Your Module 11 Preventing Electrostatic Discharge This module is sensitive to electrostatic discharge ATTENTION Electrostatic discharge can damage integrated circuits or semiconductors if you touch backplane connector pins Follow these guidelines when you handle the module Touch a grounded object to discharge static potential Wear an approved wrist strap grounding device Do not touch the backplane connector or connector pins Do not touch circuit components inside the module If available use a static safe work station When not in use keep the module in its static shield box Removal and Insertion Under Power These modules are designed to be installed or removed while chassis power is applied ATTENTION When you insert or remove a module while backplane power is applied an electrical arc may occur An electrical arc can cause personal injury or property damage by sending an erroneous signal to your system s field devices causing unintended machine motion or loss of process control causing an explosion in a hazardous environment Repeated electrical arcing causes excess
6. AEE S rel Lp v BA Offine D RUN q Pan ne or BONN EZ J Par aB Dra 7 NoFoces b m ok y ok Nod e Hp a See A a o 4 pepe Ee BI dr Nrovores KEK Terrier A 8 ABE A TREES A 3 Tasks Motion Groups 2 Motion Groups Trends Trends Data Types 3 Data Types 5 6 1 0 Configuration B S 1 0 Configuration BJ 3 1756 MODULE IF8u BJ 1 1756 MODULE IF8u BJ 2 1758 8160 Sharedlnput BJ 4 1756 0B16D dcoutputs fJ 8 1756 F6l analog inputs fJ 8 1756 MO2AE ServoCard 1 Open the sample project 2 Open your new project 3 Click once on the IF8u in the sample project 4 Drag and drop it into the I O Configuration section of your project See Appendix D for the I O module property details Chapter 4 Programming Your Module 31 2 Drag and drop the IF8u user defined data types from the sample project into your project There are four IF8u user defined data types that need to be moved f amp RSLogix 5000 IF8u_Sample 1756 11 gix 5000 Your Project 17 BBa D eee Offline D E RUN oo Wael No Forces b ToK No Edits Bir ETE TEPARA a Se rs ES EE Bj str Bl iff Favorites Kem Kc mece A Motion Groups Trends Data Types S S User Defined S S User Defined ChannelConfig ChannelConfi ii ChannelStatus ChannelStatus e IFBLI Config Template faultrecord iif IFBU Input Template ii
7. Chapter 5 Channel Configuration Data and Status 47 Current Engineering Units value 3mA 6 25 4mA 0 12mA 50 20mA 100 21mA 106 25 Important In choosing two points for the low and high signal value of your channel you do not limit the range of the module LowSignal REAL When the input is this value it will scale the input to the LowEngineering value HighSignal REAL When the input is this value it will scale the input to the HighEngineering value LowEngineering REAL The scaled value that will be displayed when the input is at the LowSignal value HighEngineering REAL The scaled value that will be displayed when the input is at the HighSignal value Note User scaling is disabled if LowSignal is equal to HighSignal or LowEngineering is equal to HighEngineering Input Filters Module Filter The universal module uses a ADC filter that provides high frequency noise rejection for the input signals The ADC filter is programmable allowing you to select from four filter frequencies for each channel The filter provides the highest noise rejection at the selected filter frequency Selecting a low value i e 10 Hz for the channel filter frequency provides the best noise rejection for a channel but it also increases the channel update time Selecting a high value for the channel filter frequency provides lower noise rejection but decreases the channel update time 48 ControlLogix Un
8. Owner s Guide 0300191 04 Rev A CONTROLLOGIX UNIVERSAL ANALOG INPUT MODULE Catalog Number 1756sc IF8u amp KA UE Q o U 2 SPECTRUM C O N TROL S Important Notes 1 Please read all the information in this owner s guide before installing the product 2 The information in this owner s guide applies to hardware version A and firmware version 2 0 or later 3 This guide assumes that the reader has a full working knowledge of the relevant processor Notice The products and services described in this owner s guide are useful in a wide variety of applications Therefore the user and others responsible for applying the products and services described herein are responsible for determining their acceptability for each application While efforts have been made to provide accurate information within this owner s guide Spectrum Controls assumes no responsibility for the accuracy completeness or usefulness of the information herein Under no circumstances will Spectrum Controls be responsible or liable for any damages or losses including indirect or consequential damages or losses arising out of either the use of any information within this owner s guide or the use of any product or service referenced herein No patent liability is assumed by Spectrum Controls with respect to the use of any of the information products circuits programming or services referenced herein The information in th
9. 4 Perform a Set Attribute All or Module Reconfigure message instruction via ladder logic Refer to your sample program for information about the DoSetAttrAII command 38 ControlLogix Universal Analog Input Module Configuration Tags Global Module Settings Note If an invalid configuration is sent to the module a connection error will occur See chapter 7 for a list of error codes The following Global Module Settings and Channel Specific Settings sections allow custom configuration of the module These tags can be found within the IF8u_config controller tag The following tag settings are module related Configuration Management ConfigRevNumber 0 1 BOOL 0 The module will always accept this configuration if valid This value must be used for on the fly configuration changes 1 In multiple owner systems if there is already a connection to the module then this configuration must match the one of the current connection in order for this controller to connect to the module Channel On Off Note The Module Reconfigure message instruction sets this parameter to Zero Temperature Measurement RemoteTermination 0 1 BOOL Not Used CJDisable 0 1 BOOL 0 The cold junction compensation terminal block thermistors will be read Thermocouple input values will be compensated based on the thermistor readings 1 The cold junction compensation thermal block thermistors will not be read Thermocouple input values wil
10. Low low You may configure an Alarm Deadband to work with these alarms The deadband allows the process alarm status bit to remain set despite the alarm condition disappearing as long as the input data remains within the deadband of the process alarm Chapter 5 Channel Configuration Data and Status 45 Rate Alarm The rate alarm triggers if the rate of change between input samples for each channel exceeds the specified trigger point for that channel It is based on the channels RangeType native units per second V mA degC TempMode 0 degF TempMode 1 Ohms For example if you set the a channel with a voltage range type to a rate alarm of 1 0 V S the rate alarm will only trigger if the difference between measured input samples changes at a rate gt 1 0 V S If the module s actual sampling time is 100 ms i e sampling new input data every 100ms and at time 0 the module measures 5 0 volts and at time 100ms measures 5 08 V the rate of change is 5 08V 5 0V 100mS 0 8 V S The rate alarm would not set as the change is less than the trigger point of 1 0V s If the next sample taken is 4 9V the rate of change is 4 9V 5 08V 100mS 1 8V S The absolute value of this result is gt 1 0V S so the rate alarm will set Absolute value is used because rate alarm checks for the magnitude of the rate of change being beyond the trigger point whether a positive or negative excursion Note The module acquires data
11. but not negligible oxygen content and can lead to a large decrease in the thermoelectric voltage of the thermocouple with time The effect is most serious at temperatures between 800 C and 1050 C Both thermoelements of type K thermocouples are reasonably stable thermoelectrically under neutron irradiation since the resulting changes in their chemical compositions due to transmutation are small The KN thermoelements are somewhat less stable than the KP thermoelements in that they experience a small increase in the iron content accompanied by a slight decrease in the manganese and cobalt contents ASTM Standard E230 87 in the 1992 Annual Book of ASTM Standards 7 specifies that the initial calibration tolerances for type K commercial thermocouples be 2 2 C or 0 75 whichever is greater between 0 C and 1250 C and 2 2 C or 2 whichever is greater between 200 C and 0 C In the 0 C to 1250 C range type K thermocouples can be supplied to meet special tolerances that are equal to approximately one half the standard tolerances given above Type K thermocouple materials are normally supplied to meet the tolerances specified for temperatures above 0 C However the same materials may not satisfy the tolerances specified for the 200 C to 0 C range If materials are required to meet the tolerances below 0 C this should be specified when they are purchased The suggested upper temperature limit of 1260 C given in the AS
12. guide to the user It does not apply to thermocouples having compacted mineral oxide insulation Nickel Chromium Silicon Alloy Versus Nickel Silicon Magnesium Alloy Thermocouples This type is the newest of the letter designated thermocouples It offers higher thermoelectric stability in air above 1000 C and better air oxidation resistance than types E J and K thermocouples The positive thermoelement NP is an alloy that typically contains about 84 nickel 14 88 ControlLogix Universal Analog Input Module to 14 4 chromium 1 3 to 1 6 silicon plus small amounts usually not exceeding about 0 1 of other elements such as magnesium iron carbon and cobalt The negative thermoelement NN is an alloy that typically contains about 95 nickel 4 2 to 4 6 silicon 0 5 to 1 5 magnesium plus minor impurities of iron cobalt manganese and carbon totaling about 0 1 to 0 3 The type NP and NN alloys were known originally 16 as nicrosil and nisil respectively The research reported in NBS Monograph 161 showed that the type N thermocouple may be used down to liquid helium temperatures about 4 K but that its Seebeck coefficient becomes very small below 20 K Its Seebeck coefficient at 20 K is about 2 5uV K roughly one third that of type E thermocouples which are the most suitable of the letter designated thermocouples types for measurements down to 20 K Nevertheless types NP and NN thermoelements do have a relatively low
13. inhomogeneities in the thermocouple and thereby limit its accuracy in this range They emphasized the important of annealing techniques The positive thermoelement is unstable in a thermal neutron flux because the rhodium converts to palladium The negative thermoelement is relatively stable to neutron transmutation Fast neutron bombardment however will cause physical damage which will change the thermoelectric voltage unless it is annealed out At the gold freezing point temperature 1064 18 C the thermoelectric voltage of type S thermocouples increases by about 340uV about 3 per 86 ControlLogix Universal Analog Input Module B Type Thermocouples weight percent increase in rhodium content the Seebeck coefficient increases by about 4 per weight percent increase at the same temperature ASTM Standard E230 87 in the 1992 Annual Book of ASTM Standards 7 specifies that the initial calibration tolerances for type S commercial thermocouples be 1 5 C or 0 25 whichever is greater between 0 C and 1450 C Type S thermocouples can be supplied to meet special tolerances of 0 6 C or 0 1 whichever is greater The suggested upper temperature limit 1480 C given in the ASTM standard 7 for protected type S thermocouples applies to AWG 24 0 51mm wire This temperature limit applies to thermocouples used in conventional closed end protecting tubes and it is intended only as a rough guide to the user It does n
14. input type does not support this function Overrange Indicates the channel s input is equal to or above the maximum value for the selected range Note The 10 to 10vdc and 0 to 10vdc input types do not support this function CalFault Status bit indicating if the channel has a Bad calibration means that the third attempt to autocalibrate the channel failed with an error and was aborted RateAlarm Alarm bit which gets set when the input channel s rate of change exceeds the configured RateAlarmLimit Remains set until the rate of change drops below the configured limit unless latched via RateAlarmLatch in the configuration LAlarm Low alarm bit which is set when the input signal moves beneath the configured low alarm trigger point LAlarmLimit Remains set until the input signal moves above the trigger point unless latched via ProcessAlarmLatch or the input is still within the configured alarm deadband of the low alarm trigger point HAlarm High alarm bit which is set when the input signal moves above the configured high alarm trigger point HAlarmLimit Remains set until the input signal moves below the trigger point unless latched via ProccessAlarmLatch or the input is still within the configured alarm deadband of the high alarm trigger point LLAlarm Low low alarm bit which is set when the input signal moves beneath the configured low low alarm trigger point LLAlarmLimit Remains set until the input sign
15. 36 TC Type N 18 RTD 500 Ni 618 37 TC Type C 44 IM ControlLogix Universal Analog Input Module Temperature Measurement RTD3Wire 0 1 BOOL 0 Two wire RTD or resistor if RTD or resistor input type for this channel is selected 1 Three or four wire RTD or resistor if RTD or resistor input type for this channel is selected DisableCyclicLead 0 1 BOOL 0 If 30r 4 wire RTDs or resistors are selected then the lead resistances are also read and compensated for Note Only one channel s lead resistance is read during each all channel scan every 5 minutes This reduces the effect of the increased scan time due to lead measurements This means however that the lead resistance for any given channel will be measured only once every 5 minutes if all channels are enabled with 3 or 4 wire RTDs 1 RTD lead resistance will only be read for this channel on power up reset and reconfigure TenOhmOffset 100 to 100 INT An optional offset in ohms to be applied to the 10 ohm copper RTD input type 100 to 100 correspond to 1 00 to 1 00 ohms For example if the resistance of a copper RTD used with this channel was 9 74 ohms at 250C you would enter 0 26 in this field Process Alarms Process alarms alert you when the module has exceeded configured high or low limits for each channel You can latch process alarms These are set at four user configurable alarm trigger points High high High Low
16. 68 For additional technical information regarding ITS 90 refer to the NIST Monograph 175 Iron Versus Copper Nickel Alloy SAMA Thermocouples This is one of the most common types of industrial thermocouples because of its relatively high Seebeck coefficient and low cost It has been reported that more than 200 tons of type J materials are supplied annually to industry in this country However this type is least suitable for accurate thermometry because there are significant nonlinear deviations in the thermoelectric output of thermocouples obtained from different manufacturers These irregular deviations lead to difficulties in obtaining accurate calibrations based on a limited number of calibration points The positive thermoelement is commercially pure 99 5 Fe iron usually containing significant impurity levels of carbon chromium copper manganese nickel phosphorus silicon and sulfur Thermocouple wire represents such a small fraction of the total production of commercial iron wire that the producers do not control the chemical composition to maintain constant thermoelectric properties Instead instrument companies and thermocouple fabricators select material most suitable for 76 ControlLogix Universal Analog Input Module the thermocouple usage The total and specific types of impurities that occur in commercial iron change with time location of primary ores and methods of smelting Many unusual lots have been sele
17. Control in Science and Industry Vol 4 Plumb H H ed Pittsburgh Instrument Society of America 1972 1543 1560 31 McLaren E H Murdock E G The properties of Pt PtRh thermocouples for thermometry in the range 0 1100C I Basic measurements with standard thermocouples National Research Council of Canada Publication APH 2212 NRCC 17407 1979 32 McLaren E H Murdock E G The properties of Pt PtRh thermocouples for thermometry in the range 0 1100C II Effect of heat treatment on standard thermocouples National Research Council of Canada Publication APH 2213 NRCC 17408 1979 Appendix B Thermocouple Descriptions 93 33 McLaren E H Murdock E G Properties of some noble and base metal thermocouples at fixed points in the range 0 1100C Temperature Its Measurement and Control in Science and Industry Vol 5 Schooley J F ed New York American Institute of Physics 1982 953 975 34 Bentley R E Jones T P Inhomogeneities in type S thermocouples when used to 1064C High Temperatures High Pressures 12 33 45 1980 35 Rhys D W Taimsalu P Effect of alloying additions on the thermoelectric properties of platinum Engelhard Tech Bull 10 41 47 1969 36 Cochrane J Relationship of chemical composition to the electrical properties of platinum Engelhard Tech Bull 11 58 71 1969 Also in Temperature Its Measurement and Control in Science and Industry Vol 4 Plumb H H ed Pitts
18. FS 0 25 FS Resistance Input 0 4000 ohms 0 05 FS 0 1 FS 0 1 FS 0 25 FS Input Type Error 25C Error over temp typical amp worst case typical amp worst case TypeJ 210 to 1200C Type K 225 to 1370C Type K 270 to 225C Type T 230 to 400C Type T 270 to 230C Type E 220 to 1000C Type E 270 to 220C TypeR Oto 1768C Type S Oto 1768C Type B 600 to 1820C Type B 300 to 600C Type N 200 to 1300C Type N 210 to 200C Type C 0t02315C 0 05 FS 0 1 FS 0 05 FS 0 1 FS 0 3 FS 0 6 FS 0 05 FS 0 1 FS 0 5 FS 1 25 FS 0 05 FS 0 1 FS 0 25 FS 0 5 FS 0 06 FS 0 12 FS 0 06 FS 0 12 FS 0 09 FS 0 18 FS 0 11 FS 0 22 FS 0 05 FS 0 1 FS 0 07 FS 0 14 FS 0 05 FS 0 1 FS 0 196 FS 0 25 FS 0 1 FS 0 25 FS 0 6 FS 1 2 FS 0 2596 FS 0 5 FS 1 25 FS 2 5 FS 0 196 FS 0 25 FS 0 5 FS 1 0 FS 0 12 FS 0 25 FS 0 12 FS 0 25 FS 0 2596 FS 0 5 FS 0 5 FS 1 0 FS 0 1 FS 0 25 FS 0 14 FS 0 28 FS 0 1 FS 0 25 FS 74 ControlLogix Universal Analog Input Module Current Input 0 to20mA Current Input 4 to 20mA Voltage Input 10 to 10V Voltage Input 0 to 10V Voltage Input Oto 5 V Voltage Input 1 toSV Voltage Input 50m to 50mV Voltage Input 150m to 150mV 0 05 FS 0 1 FS 0 05 FS 0 1 FS 0 025 FS 0 05 FS 0 02596 FS 0 05 FS 0 025 FS 0 05 FS 0 02596 FS 0 05 FS 0 05 FS 0 1 FS 0 05 FS 0 1 FS 0 1 FS 0 25 FS 0 1 F
19. Important When changing configuration for a module with multiple owners we recommend the connection be inhibited To prevent other owners from receiving potentially erroneous data as described above the following steps must be followed when changing a module s configuration in a multiple owner scenario when online 1 For each owner controller inhibit the controller s connection to the module in the software on the I O Module Connection tab 2 Make the appropriate configuration data changes in the software 3 Repeat steps 1 and 2 for all owner controllers making the exact same changes in all controllers 4 Uncheck the Inhibit box in each owner s configuration to reconnect each module 28 ControlLogix Universal Analog Input Module Module Installation Adding Your Module to a Project Chapter 4 Programming Your Module This chapter explains how to program your module in the ControlLogix system It also describes how the module s input configuration are incorporated into your ladder logic program Topics discussed include importing the module s configuration profile reviewing accessing and altering configuration options configuring the modules input type and filter settings configuring alarms and limits To incorporate the module into the system you must use the RSLogix 5000 programming software If you re using RSLogix 5000 version 15 or greater an AOP Add On Profile is available and can be do
20. RTDs which are composed of 2 Signal and 2 RTD return lead wires EXC and IN with a the return RTD lead to IN The fourth lead is not used so wiring is identical to 3 wires RTDs 2 wire Resistance which is composed of 2 leads EXC and IN with a jumper between EXC and IN 3 wire Resistance which is composed of 3 leads EXC IN and IN and the resistance lies between IN and IN In any RTD sensing system it is important that the lead and sense wire resistances are matched as much as possible The lead lengths and their resulting impedances must be matched and kept small to eliminate the introduction of connectivity errors The 3 4 wire RTDs are the most accurate with 2 wire RTDs being the most inaccurate In 2 wire the lead resistance adds error to the resulting degree reading With a 1 008mA current source 1Q of lead resistance adds 1 008uV or 2 82 C error with the 100Q 385 alpha type To gain an understanding of how lead resistance affects RTD readings the nV C for each RTD type is listed below Chapter 2 Installing And Wiring Your Module 19 RTD Type Current Source V C 100Q Pt 385 1 008mA 357uV C 2000 Pt 385 1 008mA 714uV C 5009 Pt 385 252A 447 UV C 10000 Pt 385 2520A 893yV C 1000 Pt 3916 1 008mA 377uV C 2009 Pt 3916 1 008mA 754uV C 5009 Pt 3916 202A 472uV C 10000 Pt 3916 252uA 941uV C 1200 Ni 618 1 008mA 694uV C 2000 Ni 618 1 008mA 1389uV C 5000 Ni 618 252uA 867uV C 1000
21. Safety Circuits Circuits installed on machinery for safety reasons like over travel limit switches stop push buttons and interlocks should always be hard wired to the master control relay These circuits should also be wired in series so that when any one circuit opens the master control relay is de energized thereby removing power Never modify these circuits to defeat their function Serious injury or equipment damage may result WARNING EXPLOSION HAZARD SUBSTITUTION OF COMPONENTS MAY IMPAIR SUITABILITY FOR CLASSI DIVISION2 WARNING EXPLOSION HAZARD DO NOT DISCONNECT EQUIPMENT UNLESS POWER HAS BEEN SWITCHED OFF OR THE AREA IS KNOWN TO BENON HAZARDOUS NOTE THIS EQUIPMENT IS SUITABLE FOR USE IN CLASSI DIVISION 2 GROUPS A B C AND D OR NON HAZARDOUS LOCATIONS ONLY Chapter 8 Maintaining Your Module And Ensuring Safety 67 WARNING EXPLOSION HAZARD WHEN IN HAZARDOUS LOCATIONS TURN OFF POWER BEFORE REPLACING OR WIRING MODULES WARNING THIS DEVICE IS INTENDED TO ONLY BE USED WITH THE ALLEN BRADLEY CONTROLLOGIX 1756 I O SYSTEM ControlLogix Universal Analog Input Module Electrical Specifications Appendix A Module Specifications This appendix lists the specifications for the 1756sc IF8u Universal analog Input Module Backplane Current Consumption Backplane Power Consumption Number of Channels TO Chassis Location A D Conversion Method
22. Thermocouples As shown in the illustration that follows the shield input terminals are connected together which are then connected to chassis ground Using grounded junction thermocouples with electrically conductive sheaths removes the thermocouple signal to chassis ground isolation of the module This is inherent to the thermocouple construction In addition if multiple grounded junction thermocouples are used the module s channel to channel isolation is removed since there is no isolation between signal and sheath and the sheaths are tied together It should be noted that the isolation is removed even if the sheaths are connected to chassis ground at a location other than the module since the module is connected to chassis ground Appendix B Using Grounded Junction Ungrounded Junction and Exposed Junction Thermocouples 99 For grounded junction thermocouples it is recommended that they have protective sheathes made of electrically insulated material e g ceramic or the metal protective sheaths be floated The metal sheaths would need to be floated with respect to any path to chassis ground or to another thermocouple metal sheath This means the metal sheath must be insulated from electrically conductive process material and have all connections to chassis ground broken It should be noted that a floated sheath may result in a less noise immune thermocouple signal 1756sc IF8u Grounded junction with shielded cable om o
23. causing an interruption in input data This can be useful for sending new alarm values DoSet ttrAll d OP Gerai CIP Generic Message Control MsgSetttibuteAll D seein Rung 4 is an example of how to unlatch all alarms for a given channel In this case the 3rd channel UL All MSG JE Type CIP Generic 0 7 Message Control UL Ch All LJ lt D UL All U Rung 0 This rung copies the configuration data IF8u_Config into the module s configuration image memory This rung is required Rung 1 This rung copies the input data received from the module s input memory into the IF8u_Input tag for monitoring and ladder usaged this rung is required Rung 2 This is an optional example rung indicating how to reset the module via ladder logic Chapter 6 Ladder Program Examples 57 Message Configuration MsgReset ICIP Generic Device Reset Source Element SOUTCE LETT TS Ex T IJESHrTat or Rung 3 This is an optional example rung indicating how to send on the fly configuration data to the module This is useful if you would like to change channel alarm or scaling tags without causing interuption in channel updates Changing other tags will cause a 2 5 second delay in channel updates but the connection will not be interupted Continued on next page 58 ControlLo TM gx Universal Analog Input Module You may use either the SetAttributeAll o
24. continuously even though it is only reported to the controller at the RealTimeSample rate The sampling time used for calculating the rate alarm is the acquisition rate This can be determined by setting the RealTimeSample tag to 10ms Faster than the module can acquire data and record the difference between successive RollingTimeStamp values AlarmEnable 0 1 BOOL 0 Process and rate alarms are disabled 1 Process and rate alarms are enabled ProcessAlarmLatch 0 1 BOOL 0 Process alarms are not latched 1 Process alarms are latched RateAlarmLatch 0 1 BOOL 0 Rate alarm is not latched 1 Rate alarm is latched RateAlarmLimit 0 to 4x of native signal value REAL Specifies a rate alarm will occur if the input data changes more than the configured amount per second between two successive reads either negative or positive Specified in units V mA Ohms DegC DegF per second 46 IM ControlLogix Universal Analog Input Module LAlarmLimit REAL A low alarm will activate if the value of the scaled input is at or below this value It will clear if not latched if it is above this level plus the AlarmDeadband amount HAlarmLimit REAL A high alarm will activate if the value of the scaled input is at or above this value It will clear if not latched if it is below this level plus the AlarmDeadband amount LLAlarmLimit REAL A low low alarm will activate if the value of the scaled input is at or be
25. data is transferred to the controller during the program download and subsequently transferred to the appropriate I O modules I O modules in the same chassis as the controller are ready to run as soon as the configuration data has been downloaded You must run RSNetWorx to enable I O modules in the networked chassis Running RSNetWorx transfers configuration data to networked modules and establishes a Network Update Time NUT for ControINet that is compliant with the desired communications options specified for each module during configuration If you are not using I O modules in a networked chassis running RSNetWorx is not necessary However anytime a controller references an I O module in a networked chassis RSNetWorx must be run to configure ControlNet Follow these general guidelines when configuring I O modules 1 Configure all I O modules for a given controller using RSLogix 5000 and download that information to the controller 24 ControlLogix Universal Analog Input Module Direct Connections Module Operation Modules in a Local Chassis 2 If the I O configuration data references a module in a remote chassis run RSNetWorx Important RSNetWorx must be run whenever a new module is added to a networked chassis When a module is permanently removed from a remote chassis we recommend that RSNetWorx be run to optimize the allocation of network bandwidth A direct connection is a real time data transfer link between
26. data values in their final form 36 ControlLogix Universal Analog Input Module a i3 m Status Tags These tags report module status such as alarm conditions faults and errors Send Configuration Data to the Module Chapter 5 Configuration Data and Status Tags Read this chapter to send configuration data to the module configure global module properties configure each input channel check each input channel s data check module and individual channel status This chapter outlines the detailed settings for the 1756sc IF8u These settings determine the modules input types filter frequencies scan rates and various attributes Detailed descriptions of these settings are available in the Tag Definition section of this chapter Note An AOP Add On Profile is availabe for the 1756sc IF8U and can be downloaded from our website at http www spectrumcontrols com downloads htm Note The following format is used to describe tags Tag Name Range Data Type After changing the configuration tags in this chapter you must then send them to the module To do this you may perform any of these operations 1 Inhibit then un inhibit the module via the module properties dialog Connection Tab 2 Reset the module via the modules properties dialog Module Info tab 3 Reset the module via ladder logic See the DoReset rung in the sample ladder project
27. ex dee ee o neret 55 Figure 5 1 Sample Ladder Logic ed enters 56 Using Module Indicators to Troubleshoot seen 1 Using RSLogix 5000 to Troubleshoot Your Module sese e Module Configuration Errors essere nnne 64 Preventive Maintenance eosdem os cosa ori ne Prec o heic pe ret eaae 65 Safety Consideratioris nins er neri iere tig eie iere ire ps 65 Bl ctrical Specifications uoce a to i e E n PO EAM Ri d 69 Physical 4 0 6011102006 E OOE EEA 70 Environmental Specificati fis oce eaae o d n en OO RYE dn n 70 Input 5601116 011008 20 70 J Type Th rmnocoupl s i iade ient dt e Ua Eo d RS 75 K Type Thermocouples 44e ertet OR adn TI T Type Thermocouplescaameoon ome onn nre 0 79 E Type Thermocou ples oiii tn fer nte t tf genes 81 R Type Thermocouples RI Ee 83 S Type Thermocouples 84 B Type ThermocoupleS odd ota eter pei HU t erras 86 N Type Thermocouple Serrara anpra 87 Referee nsi reet r a REE OTE O RS 90 Using Grounded Junction Ungrounded Junction and Exposed Junction Thermocouples 97 Programming Your Module 101 Table of Contents xi PMETMOCOUPIE Type Serre terere ride rr o ER dee a E Ren 97 Grounded 0 oreet terrtrtrdeer tr d n iii e P EH NR ae 98 Ungrounded Insulated Junction esee 98 Exposed Junction ene per PRI OD IER P E EE 98 OO 98 Module Installation 32 5 Gn
28. greater between 200 C and 0 C Type T thermocouples can also be supplied to meet special tolerances which are equal to approximately one half the standard tolerances given above Type T thermocouple materials are normally E Type Thermocouples Appendix B Thermocouple Descriptions 81 supplied to meet the tolerances specified for temperatures above 0 C However the same materials may not satisfy the tolerances specified for the 200 C to 0 C range If materials are required to meet the tolerances below 0 C this should be specified when they are purchased The suggested upper temperature limit of 370 C given in the ASTM standard 7 for protected type T thermocouples applies to AWG 14 1 63mm wire It decreases to 260 C for AWG 20 0 81mm 200 C for AWG 24 or 28 0 51mm or 0 33mm and 150 C for AWG 30 0 25mm These temperature limits apply to thermocouples used in conventional closed end protecting tubes and they are intended only as a rough guide to the user They do not apply to thermocouples having compacted mineral oxide insulation Nickel Chromium Alloy Versus Copper Nickel Alloy Thermocouples This type and the other base metal types do not have specific chemical compositions given in standards rather any materials whose emf temperature relationship agrees with that of the specified reference table within certain tolerances can be considered to be a type E thermocouple The positive thermoelement EP is the same
29. of the ADC was assumed to be at least 16 bits use of the 10Hz 50Hz and 60Hz filter frequencies Note The 250Hz frequency should not be applied to thermocouple or RTD inputs if accuracy is a concern Input Type Error 25C Error over temp typical amp worst case typical amp worst case Platinum 385 100 ohm 0 05 FS 0 1 FS 0 1 FS 0 25 FS Platinum 385 200 ohm 0 05 FS 0 1 FS 0 1 FS 0 25 FS Platinum 385 500 ohm 0 05 FS 0 1 FS 0 196 FS 0 25 FS Platinum 385 1000 ohm 0 05 FS 0 196 FS 0 1 FS 0 25 FS Platinum 3916 100 ohm 0 05 FS 0 1 FS 0 1 FS 0 2596 FS Platinum 3916 200 ohm 0 05 FS 0 196 FS 0 1 FS 0 25 FS Platinum 3916 500 ohm 0 05 FS 0 196 FS 0 196 FS 0 25 FS Platinum 3916 1000 ohm 0 0596 FS 0 196 FS 0 196 FS 0 25 FS Nickel 618 120 ohm 0 0596 FS 0 196 FS 0 196 FS 0 25 FS Nickel 618 200 ohm 0 05 FS 0 1 FS 0 1 FS 0 25 FS Nickel 618 500 ohm 0 05 FS 0 1 FS 0 1 FS 0 25 FS Nickel 618 1000 ohm 0 05 FS 0 1 FS 0 1 FS 0 25 FS Nickel 672 120 ohm 0 05 FS 0 1 FS 0 1 FS 0 25 FS Nickel Fe 5 18 604 ohm 0 05 FS 0 1 FS 0 196 FS 0 25 FS Cu 427 10 ohm 0 5 FS 1 0 FS 1 0 FS 2 0 FS Resistance Input 0 250 ohms 0 0596 FS 0 1 FS 0 25 FS 0 5 FS Resistance Input 0 500 ohms 0 05 FS 0 1 FS 0 1 FS 0 25 FS Resistance Input 0 1000 ohms 0 05 FS 0 1 FS 0 1 FS 0 25 FS Resistance Input 0 2000 ohms 0 0596 FS 0 1 FS 0 1 FS 0 25 FS Resistance Input 0 3000 ohms 0 0596 FS 0 1 FS 0 1
30. or EN is a copper nickel alloy known ambiguously as constantan The word constantan refers to a family of copper nickel alloys containing anywhere from 45 to 60 copper These alloys also typically contain small percentages of cobalt manganese and iron as well as trace impurities of other elements such as carbon magnesium silicon etc The constantan for type T thermocouples usually contains about 55 copper 45 nickel and small but thermoelectrically significant amounts about 0 1 or larger of cobalt iron or manganese It should be emphasized that type TN or EN thermoelements are NOT generally interchangeable with type JN thermoelements although they are all referred to as constantan In order to provide some differentiation in nomenclature type TN or EN is often referred to as Adams or RP1080 constantan and type JN is usually referred to as SAMA constantan The thermoelectric relations for type TN and type EN thermoelements are the same that is the voltage versus temperature equations and tables for platinum versus type TN thermoelements apply to both types of thermoelements over the temperature range recommended for each thermocouple type However it should not be assumed that type TN and type EN thermoelements may be used interchangeably or that they have the same commercial initial calibration tolerances The low temperature research 8 by members of the NBS Cryogenics Division showed that the type T thermocouple m
31. or impurity level because both are already heavily alloyed Similarly they are also not extremely sensitive to minor differences in heat treatment provided that the treatment does not violate any of the restrictions mentioned above For most general applications they may be used with the heat treatment given by the wire manufacturers However when the highest accuracy is sought additional preparatory heat treatments may be desirable in order to enhance their performance Details on this and other phases of the use and behavior of type KP thermoelements EP is the same as KP are given in publications by Pots and McElroy 14 by Burley and Ackland 15 by Burley 16 by Wang and Starr 17 18 by Bentley 19 and by Kollie et al 20 ASTM Standard E230 87 in the 1992 Annual Book of ASTM Standards 7 specifies that the initial calibration tolerances for type E commercial thermocouples be 1 7 C or 0 5 whichever is greater between 0 C and 900 C and 1 7 C or 1 whichever is greater between 200 C and 0 C Type E thermocouples can also be supplied to meet special tolerances which are equal to 1 C or 0 4 whichever is greater between 0 C and 900 C and 1 C or 0 5 whichever is greater between 200 C and 0 C Type E thermocouple materials are normally supplied to meet the tolerances specified for temperatures above 0 C The same materials however may not satisfy the tolerances specified for the 20
32. special tolerances that are equal to approximately one half the standard tolerances given above Tolerances are not specified for type N thermocouples below 0 C The suggested upper temperature limit of 1260 C given in the ASTM standard 7 for protected type N thermocouples applies to AWG 8 3 25mm wire It decreases to 1090 C for AWG 14 1 63mm 980 C for AWG 20 0 81mm 870 C for AWG 24 or 28 0 51mm or 0 33mm and 760 C for AWG 30 0 25mm These temperature limits apply to thermocouples used in conventional closed end protecting tubes and they are intended only as a rough guide to the user They do not apply to hermocouples having compacted mineral oxide insulation 90 ControlLogix Universal Analog Input Module References 1 Preston Thomas H The International Temperature Scale of 1990 ITS 90 Metrologia 27 3 10 1990 ibid p 107 2 The International Practical Temperature Scale of 1968 Amended Edition of 1975 Metrologia 12 7 17 1976 3 Mangum B W Furukawa G T Guidelines for realizing the International Temperature Scale of 1990 ITS 90 Natl Inst Stand Technol Tech Note 1265 1990 August 190 p 4 The 1976 Provisional 0 5 to 30 K Temperature Scale Metrologia 15 65 68 1979 5 ASTM American Society for Testing and Materials Manual on the use of thermocouples in temperature measurement Special Tech Publ 470B edited by Benedict R P Philadelphia ASTM 1981 258p 6 Hanse
33. thermal conductivity and good resistance to corrosion in moist atmospheres at low temperatures Type N thermocouples are best suited for use in oxidizing or inert atmospheres Their suggested upper temperature limit when used in conventional closed end protecting tubes is set at 1260 C by the ASTM 7 for 3 25mm diameter thermoelements Their maximum upper temperature limit is defined by the melting temperature of the thermoelements which are nominally 1410 C for type NP and 1340 C for type NN 5 The thermoelectric stability and physical life of type N thermocouples when used in air at elevated temperatures will depend upon factors such as the temperature the time at temperature the diameter of the thermoelements and the conditions of use Their thermoelectric stability and oxidation resistance in air have been investigated and compared with those of type K thermocouples by Burley 16 by Burley and others 13 44 47 by Wang and Starr 17 43 48 49 by McLaren and Murdock 33 by Bentley 19 and by Hess 50 Type N thermocouples in general are subject to the same environmental restrictions as types E and K They are not recommended for use at high temperatures in sulfurous reducing or alternately oxidizing and reducing atmospheres unless suitably protected with protecting tubes They also should not be used in vacuum at high temperatures for extended times because the chromium and silicon in the positive thermoelement a nicke
34. thermocouples in the mineral insulated metal sheathed format thermoelectric instabilities to 1100C J Phys E Sci Instrum 19 262 268 1986 53 Wang T P Bediones D 10 000 hr stability test of types K N and a Ni Mo Ni Co thermocouple in air and short term tests in reducing atmospheres Temperature Its Measurement and Control in Science and Industry Vol 6 Schooley J F ed New York American Institute of Physics 1992 595 600 54 Burley N A N CLAD N A novel advanced type N integrally sheathed thermocouple of ultra high thermoelectric stability High Temperatures High Pressures 8 609 616 1986 55 Burley N A A novel advanced type N integrally sheathed thermocouple of ultra high thermoelectric stability Thermal and Temperature Measurement in Science and Industry 3rd Int IMEKO Conf Sheffield Sept 1987 115 125 56 Burley N A N CLAD N A novel integrally sheathed thermocouple optimum design rationale for ultra high thermoelectric stability Temperature Its Measurement and Control in Science and Industry Vol 6 Schooley J F ed New York American Institute of Physics 1992 579 584 Appendix B Thermocouple Descriptions 95 57 Bentley R E The new nicrosil sheathed type N MIMS thermocouple an assessment of the first production batch Mater Australas 18 6 16 18 1986 58 Bentley R E Russell Nicrosil sheathed mineral insulated type N thermocouple probes for short term va
35. to 1768 C 32 F to 3214 F S 0 C to 1768 C 32 F to 3214 F N 210 C to 1300 C 346 F to 2372 F C 0 C to 2315 C 32 F to 4199 F CJC Sensor 0 C to 90 C 32 F to 194 F Table 1 2 RTD Temperature Ranges Type C Temp Range F Temp Range Platinum 385 1000hm 200 C to 850 C 328 F to 1562 F 2000hm 200 C to 850 C 328 F to 1562 F 5000hm 200 C to 850 C 328 F to 1562 F 10000hm 200 C to 850 C 328 F to 1562 F Platinum 3916 1000hm to 630 C 328 F to 1 166 F 2000hm 200 C to 630 C 328 F to 1 166 F 5000hm 200 C to 630 C 328 F to 1 166 F 10000hm 200 C to 630 C 328 F to 1 166 F Copper 426 100hm 100 C to 260 C 148 F to 500 F Nickel 618 1200hm 100 C to 260 C 148 F to 500 F 2000hm to 260 C 148 F to 500 F 5000hm to 260 C 148 F to 500 F 10000hm 100 C to 260 C 148 F to 500 F Nickel 672 1200hm 80 C to 260 C 112 F to 500 F Nickel Iron 518 6040hm 100 C to 200 C 148 F to 392 F The digits in parenthisis following the RTD type represent the temperature coefficient of resistance alpha a which is defined as the resistance change per Ohm per C For instance Platinum 385 refers to a platinum RTD witha 0 00385 Ohms Ohm C or simply 0 00385 C Hardware Features Chapter 1 Module Overview 3 Table 1 3 Millivolt Input Ranges Stated Actual 50 to 50 mV 75 to 75 mV 150 to 150
36. 0 C to 0 C range If materials are required to meet the tolerances below 0 C this should be specified when they are purchased The suggested upper temperature limit 870 C given in the ASTM standard 7 for protected type E thermocouples applies to AWG 8 3 25mm wire It decreases to 650 C for AWG 14 1 63mm 540 C for R Type Thermocouples Appendix B Thermocouple Descriptions 83 AWG 20 0 81mm 430 C for AWG 24 or 28 0 51mm or 0 33mm and 370 C for AWG 30 0 25mm These temperature limits apply to thermocouples used in conventional closed end protecting tubes and they are intended only as a rough guide to the user They do not apply to thermocouples having compacted mineral oxide insulation Platinum 13 Rhodium Alloy Versus Platinum Thermocouples This type is often referred to by the nominal chemical composition of its positive RP thermoelement platinum 13 rhodium The negative RN thermoelement is commercially available platinum that has a nominal purity of 99 99 21 An industrial consensus standard ASTM E1159 87 specifies that rhodium having a nominal purity of 99 98 shall be alloyed with platinum of 99 99 purity to produce the positive thermoelement which typically contains 13 00 0 05 rhodium by weight This consensus standard 21 describes the purity of commercial type R materials that are used in many industrial thermometry applications and that meet the calibration tolerances described later in thi
37. 0 Ni 618 252uA 1733uV C 100 Cu 426 202A 9 7uV C 1200 Ni 672 1 008mA 929uV C The accuracies specified for the IF8u RTDs do not include errors due to lead resistance imbalances Important To ensure temperature or resistance value accuracy the resistance difference of the cable lead wires must be equal to or less than 0 01 ohms Important Keep total lead resistance as small as possible and less than 25 ohms There are several ways to insure that the lead values match as closely as possible They are as follows Use quality cable that has a small tolerance impedance rating Use a heavy gauge lead wire which has less resistance per foot Wiring Thermocouples to the IF8u Module One end of thermocouple to IN Other end of thermocouple to IN Thermocouple Inputs EXC O N O IN O iRIN O CABLE SHIELD CJC Sensors CJC White With Potted Sensor White No Sensor For cold junction compensation be sure the two supplied thermistors are connected One should be connected between CJCO IN and CJCO IN and the other should be connected between CJC1 IN and CJC1 IN Also be sure configuration tag CJDisable is set to zero to perform cold junction compensation for thermocouple inputs Cold Junction Compensation CJC CAUTION POSSIBLE EQUIPMENT OPERATION Both CJCs are critical to ensure accurate thermocouple input readings at each channel Failure to observe thi
38. 17ms Note This is approximation only The time changes because the software does not need to spend time setting up the ADC for another filter frequency if it is the same as the previous channel The same applys for the the gain settings etc Example 2 illustrates there is a significant savings because the filter frequency and input type are the same Note If the autocalibration is enabled the module sampling time will increase by as much as 500ms when autocalibration is being performed Chapter 5 Channel Configuration Data and Status 41 RealTimeSample 10 30 000 ms INT The time in milliseconds that updated input data is to be sent from the module to the controller If this value is smaller than the minimum update time to scan all input channels then the actual rate will be greater than this value In this case you may determine what the actual sample time is by subtracting two successive values of the RollingTimeStamp input tag Real Time Sampling RTS and Requested Packet Interval RPI This RealTimeSample tag instructs the module to scan its input channels and obtain all available data After the channels are scanned the module multicasts that data This feature is used on a module wide basis During module configuration you specify a Real Time Sampling RTS period via the RealTimeSample tag and a Requested Packet Interval RPI period Both of these features instruct the module to multicast data but only the RTS feature
39. 6 RTD types SAMA RC21 4 1966 for the 10 Cu 426 RTD DIN 43760 Sept 1987 for the 120 N1618 RTD and MINCO Application Aid 18 May 1990 for the 120 N1672 RTD When configured for millivolt volt milliamp or resistance analog inputs the module converts the analog values directly into floating point values For those input types the module assumes that the input signal is linear prior to input into the module System Operation Module Operation Chapter 1 Module Overview 5 Table 1 6 Hardware Features Hardware Function OK LED Displays communication and fault status of the module Cal LED Displays a fault condition Side Label Nameplate Provides module information Removable Terminal Block Provides electrical connection to input devices Door Label Permits easy terminal identification Self Locking Tabs Secure module in chassis slot Terminal Block Switch Locksthe RTB to the module At power up the module checks internal circuits memory and basic functions During this time the Cal LED remains on If the module does not find any faults it turns off the Cal LED After completing power up checks the module wait for a connection to an owner controller then valid channel configuration data from your ladder logic program After channel configuration data is transferred and one or more channels are enabled the module continuously converts the inputs to floating point data for use in your ladder program Each time the module read
40. Dee etn etta pere rre nere de Pete deis 101 Adding Your Module to a Project sss 101 Declaration of 6201010 105 xii ControlLogix Universal Analog Input Modules General Description Chapter 1 Module Overview This chapter describes the universal analog input module and explains how the ControlLogix controller reads analog input data from the module Read this chapter to familiarize yourself further with your universal analog input module This chapter covers general description and hardware features an overview of system and module operation This module is designed exclusively for use in the Allen Bradley ControlLogix 1756 I O rack systems The module stores digitally converted thermocouple RTD resistance millivolt mV volt V milliamp mA and CJC temperature analog data in its image table for retrieval by all ControlLogix processors Following is a list of features available on the IF8u module that allow their use in a wide variety of applications Removal and insertion under power RIUP a system feature that allows you to remove and insert modules while chassis power is applied Producer consumer communications an intelligent data exchange between modules and other system devices in which each module produces data without having been polled Rolling timestamp of data 15 bit module specific rolling timestamp with millisecond resolution which indicates when data was sampled
41. Input Filtering Normal Mode Rejection between input and input Common Mode Rejection between inputs and chassis ground Input Filter Cut Off Frequencies Calibration Input Overvoltage Protection Input Overcurrent Protection Isolation User defineable 230 mA at5 VDC 75 mA at 24 VDC 3 00W maximum 0 6W 5 VDC 2 4W 24 VDC 8 backplane and channel to channel isolated Any I O module slot Sigma Delta Modulation Low pass digital filter with programmable notch filter frequencies User defined digital filter 64 5 dB at 50 Hz 60 Hz with 10 Hz filter selected 96 dB at 50 Hz 60 Hz with 10 Hz filter selected 7 8 Hzat 10 Hz filterfrequency 392 Hz at50 60 Hz filter frequency 65 54 Hz at 100 Hz filter frequency 163 9 Hzat250 Hz filter frequency 659 7 Hz at 1000 Hz filter frequency Module autocalibrates at power up and periodically afterwards 14 5 VDC continuous 250W pulsed for 1 msec 28 mA continuous 40 mA ImS pulsed 10 duty cycle maximum 1000 VDC continuous between inputs and chassis ground and between inputs and backplane 12 5 VDC continuous between channels 70 ControlLogix Universal Analog Input Module Physical Specifications Environmental Specifications Input Specifications LED Indicators 1 red green status indicators red calibration status Recommended Cable for thermocouple inputs Shielded twisted pair thermocouple extension wireg formV V or mA inputs Beld
42. KP which is the same as EP is an alloy that typically contains about 89 to 90 nickel 9 to about 9 5 chromium both silicon and iron in amounts up to about 0 5 plus smaller amounts of other constituents such as carbon manganese cobalt and niobium The negative thermoelement KN is typically composed of about 95 to 96 nickel 1 to 1 5 silicon 1 to 2 3 aluminum 1 6 to 3 2 manganese up to about 0 5 cobalt and smaller amounts of other constituents such as iron copper and lead Also type KN thermoelements with modified compositions are available for use in special applications These include alloys in which the manganese and aluminum contents are reduced or eliminated while the silicon and cobalt contents are increased The low temperature research 8 by members of the NBS Cryogenics Division showed that the type K thermocouple may be used down to liquid helium temperatures about 4 K but that its Seebeck coefficient becomes quite small below 20 K Its Seebeck coefficient at 20 K is only about 4uV K being roughly one half that of the type E thermocouple which is the most suitable of the letter designated thermocouples types for measurements down to 20 K Type KP and type KN thermoelements do have a relatively low thermal conductivity and good resistance to corrosion in moist atmospheres at low temperatures The thermoelectric 78 ControlLogix Universal Analog Input Module homogeneity of type KN thermoelements howe
43. S 0 25 FS 0 05 FS 0 1 FS 0 05 FS 0 1 FS 0 05 FS 0 1 FS 0 05 FS 0 1 FS 0 1 FS 0 2 FS 0 1 FS 0 2 FS J Type Thermocouples Appendix B Thermocouple Descriptions The following information was extracted from the NIST Monograph 175 issued in January 1990 which supersedes the IPTS 68 Monograph 125 issued in March 1974 NIST Monograph 175 is provided by the United States Department of Commerce National Institute of Standards and Technology International Temperature Scale of 1990 The ITS 90 1 3 is realized maintained and disseminated by NIST to provide a standard scale of temperature for use in science and industry in the United States This scale was adopted by the International Committee of Weights and Measures CIPM at its meeting in September 1989 and it became the official international temperature scale on January 1 1990 The ITS 90 supersedes the IPTS 68 75 2 and the 1976 Provisional 0 5 K to 30 K Temperature Scale EPT 76 4 The adoption of the ITS 90 has removed several deficiencies and limitations associated with IPTS 68 Temperatures on the ITS 90 are in closer agreement with thermodynamic values than were those of the IPTS 68 and EPT 76 Additionally improvements have been made in the non uniqueness and reproducibility of the temperature scale especially in the temperature range from t68 630 74 C to 1064 43 C where the type S thermocouple was the standard interpolating device on the IPTS
44. TM standard 7 for protected type K thermocouples applies to AWG 8 T Type Thermocouples Appendix B Thermocouple Descriptions 79 3 25mm wire It decreases to 1090 C for AWG 14 1 63mm 980 C for AWG 20 0 81mm 870 for AWG 24 or 28 0 51mm or 0 33mm and 760 C for AWG 30 0 25mm These temperature limits apply to thermocouples used in conventional closed end protecting tubes and they are intended only as a rough guide to the user They do not apply to thermocouples having compacted mineral oxide insulation Copper Versus Copper Nickel Alloy Thermocouples This type is one of the oldest and most popular thermocouples for determining temperatures within the range from about 370 C down to the triple point of neon 248 5939 C its positive thermoelement TP is typically copper of high electrical conductivity and low oxygen content that conforms to ASTM Specification B3 for soft or annealed bare copper wire Such material is about 99 95 pure copper with an oxygen content varying from 0 02 to 0 07 depending upon sulfur content and with other impurities totaling about 0 01 Above about 200 C the thermoelectric properties of type TP thermoelements which satisfy the above conditions are exceptionally uniform and exhibit little variation between lots Below about 200 C the thermoelectric properties are affected more strongly by the presence of dilute transition metal solutes particularly iron The negative thermoelement TN
45. able Module has lost it s calibration data Send in Module for repair RED 10 Blinks Major Recoverable Module s firmware watchdog timer has timed out Try resetting module If condition persists send module in for repair RED 11 Blinks Major Nonrecoverable Wrong application installed Send in Module for Repair RED 12 Blinks Major Recoverable ADC communication fault Try resetting module Ifcondition persists send module in for repair Note In RSLogix5000 the Fault Status can be seen in the Module Info tab of the module s properties dialog 62 ControlLogix Universal Analog Input Module The following LED display is used with ControlLogix analog input modules CUZ SPECTRUM CONTROLS UNIVERSAL ANALOG IN CAL 68 Using RSLogix 5000 to Troubleshoot Your Module In addition to the LED display on the module RSLogix 5000 will alert you to fault conditions You will be alerted in one of three ways Warning signal on the main screen next to the module This occurs when the connection to the module is broken Fault message in a screen s status line Notification in the Tag Editor General module faults are also reported in the Tag Editor Diagnostic faults are only reported in the Tag Editor Status on the Module Info Page The screens below display fault notification in RSLogix 5000 Ca Controller IFBu Sample GI Tasks amp Motion Groups Trends 3 Data Types eu 140 Configur
46. al moves above the trigger point unless latched via ProccessAlarmLatch or the input is still within the configured alarm deadband of the low low alarm trigger point Module Data Tags Chapter 5 Channel Configuration Data and Status 53 HHAlarm High high alarm bit which is set when the input signal moves above the configured high high alarm trigger point HHAlarmLimit Remains set until the input signal moves below the trigger point unless latched via ProccessAlarmLatch or the input is still within the configured alarm deadband of the high high alarm trigger point Status Below are a collection of individual channel status bits Bits are defined as follows 0 HHAlarm 1 LLAlarm 2 HAlarm 3 Lalarm 4 RateAlarm 5 Overrange 6 Underrange 7 CalFault 8 15 are unused The following data tags are preceeded by the tag name IF8u Input ChannelData x where x is the channel number 0 7 Ch Data REAL The channel 0 input signal represented in engineering units The input signal is measured and then scaled based on the user configuration ChlData REAL The channel 1 input signal represented in engineering units The input signal is measured and then scaled based on the user configuration Ch2Data REAL The channel 2 input signal represented in engineering units The input signal is measured and then scaled based on the user configuration Ch3Data REAL The channel 3 input signal represented in engine
47. al strength and 3 higher operating temperatures The research by Burns and Gallagher 38 indicated that the 30 6 thermocouple can be used intermittently for several hours up to 1790 C and continuously for several hundred hours at temperatures up to about 1700 C with only small changes in calibration The maximum temperature limit for the thermocouple is governed primarily by the melting point of the Pt 6 rhodium thermoelement which is estimated to be about 1820 C by Acken 40 The thermocouple is most reliable when used in a clean N Type Thermocouples Appendix B Thermocouple Descriptions 87 oxidizing atmosphere air but also has been used successfully in neutral atmospheres or vacuum by Walker et al 25 26 Hendricks and McElroy 41 and Glawe and Szaniszlo 24 The stability of the thermocouple at high temperatures has been shown by Walker et al 25 26 to depend primarily on the quality of the materials used for protecting and insulating the thermocouple High purity alumina with low iron content appears to be the most suitable material for the purpose Type B thermocouples should not be used in reducing atmospheres nor those containing deleterious vapors or other contaminants that are reactive with the platinum group metals 42 unless suitably protected with nonmetallic protecting tubes They should never be used in metallic protecting tubes at high temperatures The Seebeck coefficient of type B thermocouples de
48. applied This timestamp may be used to calculate the interval between channel or updates System timestamp of data 64 bit system clock places a timestamp on the transfer of data between the module and its owner controller within the local chassis IEEE 32 bit floating point format On Board Features such as custom User Scaling Process Alarms Rate Alarms Digital Filtering and Under Overrange Detection Automatic Calibration analog I O modules may perform autocalibration on a channel by channel or module wide basis to reduce drift inaccuracies due to module ambient temperature changes Class I Division 2 UL CSA CE and FM Agency Certification 2 ControlLogix Counter Module Detailed Specifications Input Ranges The following tables provide compatibility information on the supported thermocouple types and their associated temperature ranges the supported RTD types and their associated temperature ranges as well as the millivolt volt milliamp and resistance input types supported by the IF8u module To determine the practical temperature range of your thermocouple refer to the specifications in appendices A and B Table 1 1 Thermocouple Temperature Ranges Type C Temperature Range F Temperature Range J 210 C to 1200 C 346 F to 2192 F K 270 C to 1372 C 454 F to 2502 F T 270 C to 400 C 454 F to 752 F B 300 C to 1820 C 572 F to 3308 F E 270 C to 1000 C 454 F to 1832 F R 0 C
49. ates if a channel fault has occurred on any channel InGroupFault Indicates if a channel fault has occurred on any channel CalFault Status bit indicating if any channel has a bad calibration means that the last attempt to auto calibrate the channel failed with an error and was aborted CJOUnderrange Status bit to indicate if the Cold junction sensor CJCO reading is currently beneath the lowest detectable temperature of 0 0 degrees Celsius or open wire CJOOverrange Status bit to indicate if the Cold junction sensor CJCO reading is currently above the highest detectable temperature of 90 0 degrees Celsius or short circuit CJ1Underrange Status bit to indicate if the Cold junction sensor CJC1 reading is currently beneath the lowest detectable temperature of 0 0 degrees Celsius or open wire CJ1Overrange Status bit to indicate if the Cold junction sensor CJC1 reading is currently above the highest detectable temperature of 90 0 degrees Celsius or short circuit CJCCalFault Status bit to indicate if the Cold junction sensor CJC1 or CJC2 calibration failed 52 IM ControlLogix Universal Analog Input Module Channel related status tags The following channel related tags are preceded by the tag name IF8U Input ChannelStatus X where X is the channel number 0 7 Underrange Indicates the channel s input is equal to or less than the minimum value for the selected range or open wire Note The 10 to 10vdc
50. ation fh 3 1756 MODULE IF8u Module Fault Code 16 0009 Module Configuration Rejected Parameter Error Additional Fault Code 16 0002 Chapter 7 Testing Your Module Module Properties Local 3 1756 MODULE 1 1 Module Info Backplane Fault information on the properties screen Determining Fault Type When you are monitoring a module s properties dialog in RSLogix 5000 and receive a fault message the module fault area lists the type of fault 63 64 ControlLogix Universal Analog Input Module Module Configuration Errors The Additional Fault Code value details the configuration error if the 16 0009 module configuration rejected Parameter Error was received Global Errors 16 0F04 ConfigurationRevError If the ConfigurationRevNumber tag is 1 and a second owner attempts to connect with a different configuration this error will occur You must adjust the second owners configuration to match the first 16 0F05 ConfiguratinRevNumber Error An invalid value has been entered into this tag 1680206 CyclicalAutocalPeriod Error An invalid value has been entered into this tag 16 0F07 RealTimeSample Error An invalid value has been entered into this tag 16 0F08 CJOffset An invalid value has been entered into this tag Channel Specific Errors Note n channel number 0 7 16 0n01 RangeType Error An invalid value has
51. ay be used down to liquid 80 ControlLogix Universal Analog Input Module helium temperatures about 4 K but that its Seebeck coefficient becomes quite small below 20 K Its Seebeck coefficient at 20 K is only about 5 6uV K being roughly two thirds that of the type E thermocouple The thermoelectric homogeneity of most type TP and type TN or EN thermoelements is reasonably good There is considerable variability however in the thermoelectric properties of type TP thermoelements below about 70 K caused by variations in the amounts and types of impurities present in these nearly pure materials The high thermal conductivity of the type TP thermoelements can also be troublesome in precise applications For these reasons type T thermocouples are generally unsuitable for use below about 20 K Type E thermocouples are recommended as the most suitable of the letter designated thermocouple types for general low temperature use since they offer the best overall combination of desirable properties Type T thermocouples are recommended by the ASTM 5 for use in the temperature range from 200 C to 370 C in vacuum or in oxidizing reducing or inert atmospheres The suggested upper temperature limit for continuous service of protected type T thermocouples is set at 370 C for AWG 14 1 63mm thermoelements since type TP thermoelements oxidize rapidly above this temperature However the thermoelectric properties of type TP thermoelement
52. been entered into this tag 16 0n02 ADCFilter Error An invalid value has been entered into this tag 16 0n03 TenOhmOffset Error An invalid value has been entered into this tag 16 0n04 DigitalFilter Error An invalid value has been entered into this tag 16 0n05 RateAlarmLimit Error An invalid value has been entered into this tag 16 0n06 AlarmDeadband Error An invalid value has been entered into this tag Note If there are multiple errors in the configuration tags only one will be displayed at a time Once the displayed error has been corrected the additional errors will be displayed upon reconnection to the module Each error must be resolved before a running connection will be allowed Preventive Maintenance Safety Considerations Chapter 8 Maintaining Your Module And Ensuring Safety Read this chapter to familiarize yourself with preventive maintenance safety considerations The National Fire Protection Association NFPA recommends maintenance procedures for electrical equipment Refer to article 70B of the NFPA for general safety related work practices The printed circuit boards of your module must be protected from dirt oil moisture and other airborne contaminants To protect these boards install the ControlLogix system in an enclosure suitable for its operating environment Keep the interior of the enclosure clean and whenever possible keep the enclosure door closed Also regularly ins
53. burgh Instrument Society of America 1972 1619 1632 37 Aliotta J Effects of impurities on the thermoelectric properties of platinum nst and Control Systems 106 107 March 1972 38 Burns G W Gallagher J S Reference tables for the Pt 30 percent Rh versus Pt 6 percent Rh thermocouple J Res Natl Bur Stand U S 70C 89 125 1966 39 Ehringer H Uber die lebensdauer von PtRh thermoelementen Metall 8 596 598 1954 40 Acken J S Some properties of platinum rhodium alloys J Res Natl Bur Stand U S 12 249 RP650 1934 41 Hendricks J W McElroy D L High temperature high vacuum thermocouple drift tests Environmental Quarterly 34 38 March 1967 42 Zysk E D Platinum metal thermocouples Temperature Its Measurement and Control in Science and Industry Vol 3 Herzfeld C M ed New York Reinhold Publishing Corp 1962 Part 2 pp 135 156 43 Starr C D Wang T P A new stable nickel base thermocouple Journal of Testing and Evaluation 4 1 42 56 1976 44 Burley N A Powell R L Burns G W Scroger M G The nicrosil versus nisil thermocouple properties and thermoelectric reference data Natl Bur Stand U S Monogr 161 1978 April 167p 45 Burley N A Jones T P Practical performance of nicrosil nisil thermocouples Temperature Measurement 1975 Billing B F Quinn T J ed London and Bristol Institute of Physics 1975 172 180 94 C
54. by weight The consensus standard 21 describes the purity of commercial type S materials that are used in many industrial thermometry applications and that meet the calibration tolerances described later in this section It does not cover however the higher purity reference grade materials that traditionally were used to construct thermocouples used as standard instruments of the IPTS 68 as transfer standards and reference thermometers in various laboratory applications and to develop reference functions and tables 27 28 The higher purity alloy material typically contains less than 500 atomic ppm of impurities and the platinum less than 100 atomic ppm of impurities 27 Difference between such high purity commercial material and the platinum thermoelectric reference standard Pt 67 are described in 27 and 28 A reference function for the type S thermocouple based on the ITS 90 and the SI volt was determined recently from new data obtained in an international collaborative effort involving eight national laboratories The results of this international collaboration were reported by Burns et al 28 The new function was used to compute the reference table given in this monograph Research 27 demonstrated that type S thermocouples can be used from 50 C to the platinum melting point temperature They may be used intermittently at temperatures up to the platinum melting point and continuously up to about 1300 C with only small cha
55. commended because the oxidation rate is rapid at elevated temperatures About 50 years ago Dahl 11 studies the thermoelectric 82 ControlLogix Universal Analog Input Module stability of EP and EN type alloys when heated in air at elevated temperatures and his work should be consulted for details More recent stability data on these alloys in air were reported by Burley et al 13 Type E thermocouples should not be used at high temperatures in sulfurous reducing or alternately reducing and oxidizing atmospheres unless suitably protected with protecting tubes They also should not be used in vacuum at high temperatures for extended times because the chromium in the positive thermoelement a nickel chromium alloy vaporizes out of solution and alters the calibration In addition their use in atmospheres that promote green rot corrosion of the positive thermoelement should be avoided Such corrosion results from the preferential oxidation of chromium in atmospheres with low but not negligible oxygen content and can lead to a large decrease in the thermoelectric voltage of the thermocouple with time The effect is most serious at temperatures between 800 C and 1050 C The negative thermoelement a copper nickel alloy is subject to composition changes under thermal neutron irradiation since the copper is converted to nickel and zinc Neither thermoelement of type E thermocouples is very sensitive to minor changes in composition
56. creases with decreasing temperature below about 1600 C and becomes almost negligible at room temperature Consequently in most applications the reference junction temperature of the thermocouple does not need to be controlled or even known as long as it between 0 C and 50 C For example the voltage developed by the thermocouple with the reference junction at 0 C undergoes a reversal in sign at about 42 C and between 0 C and 50 C varies from a minimum of 2 6uV near 21 C to 8 maximum of 2 3uV at 50 C Therefore in use if the reference junction of the thermocouple is within the range 0 C to 50 C then a 0 C reference junction temperature can be assumed and the error introduced will not exceed 3uV At temperatures above 1100 C an additional measurement error of 3uV about 0 3 C would be insignificant in most instances ASTM Standard E230 87 in the 1992 Annual Book of ASTM Standards 7 specifies that the initial calibration tolerances for type B commercial thermocouples be 0 5 between 870 C and 1700 C Type B thermocouples can also be supplied to meet special tolerances of 0 25 Tolerances are not specified for type B thermocouples below 870 C The suggested upper temperature limit of 1700 C given in the ASTM standard 7 for protected type B thermocouples applies to AWG 24 0 51mm wire This temperature limit applies to thermocouples used in conventional closed end protecting tubes and it is intended only as a rough
57. cted in the past for example spools of industrial iron wire and even scrapped rails from an elevated train line At present iron wire that most closely fits these tables has about 0 25 percent manganese and 0 12 percent copper plus other minor impurities The negative thermoelement for type J thermocouples is a copper nickel alloy known ambiguously as constantan The word constantan has commonly referred to copper nickel alloys containing anywhere from 45 to 60 percent copper plus minor impurities of carbon cobalt iron and manganese Constantan for type J thermocouples usually contains about 55 percent copper 45 percent nickel and a small but thermoelectrically significant amount of cobalt iron and manganese about 0 1 percent or more It should be emphasized that type JN thermoelements are NOT generally interchangeable with type TN or EN thermoelements although they are all referred to as constantan In order to provide some differentiation in nomenclature type JN is often referred to as SAMA constantan Type J thermocouples are recommended by the ASTM 5 for use in the temperature range from 0 C to 760 C in vacuum oxidizing reducing or inert atmospheres If used for extended times in air above 500 C heavy gage wires are recommended because the oxidation rate is rapid at elevated temperatures Oxidation normally causes a gradual decrease in the thermoelectric voltage of the thermocouple with time Because iron rusts in
58. d by the thermocouple or RTD manufacturer Using the incorrect type of thermocouple extension wire or not following the correct polarity may cause invalid readings Ground the shield drain wire at only one end ofthe cable The preferred location is at the shield connections at the ControlLogix chassis Refer to IEEE Std 518 Section 6 4 2 7 or contact your sensor manufacturer for additional details Preparing and Wiring the Cables Chapter 2 Installing And Wiring Your Module 15 Keep all unshielded wires as short as possible To limit overall cable impedance keep input cables as short as possible Locate your I O chassis as near the RTD or thermocouple sensors as your application will permit Tighten screw terminals with care Excessive tightening can strip a screw The RTB terminations can accommodate 2 1 0 25 mm2 14 22 AWG shielded wire and a torque of 0 5 Nem 4 4 Ibein Follow system grounding and wiring guidelines found in your ControlLogix Installation and Operation Manual To prepare and connect cable leads and drain wires follow these steps Signal Wires Remove foil shield and drain wire i from sensor end of the cable Drain Wire N Signal Wires At the module end of the cable extract the drain wire but remove the foil shield 1 2 At each end of the cable strip some casing to expose individual wires Trim signal wires to 5 inch lengths beyond the cable casing Strip about 3 16 inc
59. dition Side Label Nameplate Provides module information Removable Terminal Block Provides electrical connection to input devices Door Label Permits easy terminal identification Self Locking Tabs Secure module in chassis slot Terminal Block Switch Locksthe RTB to the module The module contains diagnostic LEDs that help you identify the source of problems that may occur during power up or during normal operation Power up and diagnostics are explained in Chapter 7 Testing Your Module The module communicates with the ControlLogix processor and receives 5 Vdc and 24 Vdc power from the system power supply through the parallel backplane interface You may install as many universal modules in the system as the power supply can support Channels 0 through 7 can receive input signals from RTDs resistance sources thermocouples millivolt volt or milliamp devices When configured for thermocouple input types the module converts analog input voltages into cold junction compensated and linearized digital temperature readings The module uses the National Institute of Standards and Technology NIST linearization tables based on ITS 90 for thermocouple linearization When configured for RTD input types the module converts the analog input voltages into digital temperature readings based on the alpha type wire type and ohms specified The standards used are the JIS C 1604 1997 for the Pt 385 RTD types the JIS C 1604 1989 for the Pt 391
60. e pp 20 Ownership and Connections s eaae RE RR ERR ORAE 23 Using RSNetWorx and RSLogix 5000 sees 23 Direct Connections a u ae oed er ree e oi nm erred ri ges 24 Module Operation oie en p RR RM eee 24 Modules m a Local Chassis sissie r ettet terere terreri the ege 25 Requested Packet Interval RPI eere 25 Modules in a Remote Chassi8 a socer tren ee aet eaae 26 Listen Only Mod tp t oec de er e e uaa hanes 27 Multiple Owners of Input Modules ssssseeeeenennn 27 Configuration Changes in an Input Module with Multiple Owners 28 Module Installatioti TE ed edet 29 Adding Your Module to a Project ssesssseseeeenenreer nenne 29 Configuring module attributes Configuration Tags see 34 X ControlLogix Universal Analog Input Modules Configuration Data and Status Tags 37 Programming Examples 55 Troubleshooting 61 Maintaining Your Module And Ensuring Safety 65 Module Specifications 69 Thermocouple Descriptions 75 Send Configuration Data to the Module Ne 37 Conbhip ration Tags potreste eerte t ese par a i feeds 38 Global Module Setting ate or fone a RE X arent 38 Channel Specie Settlgs aou oer rit nte Pon diet 43 30 Fault and Status Reporting Tags senem 50 Module Data Tags ioo poU ROROOIDOGUDREBBIRIDU DIUINIS 53 Initial Programming oou nonertepamo eod
61. e tag configuration defines the way the module operates This chapter shows some basic programming which controls the operation of the module It also provides you with segments of ladder logic specific to unique situations that might apply to your programming requirements Figure 5 1 illustrates some basic ladder logic commands which will allow you to program the initial configuration into the module copy data to user defined tags resetthe module e make on the fly configuration changes unlatch alarms Additional ladder logic and configuration samples may also be found on our web site www spectrumcontrols com ControlLogix Universal Analog Input Module Figure 5 1 Sample Ladder Logic Rung 0 copies the user assigned configuration data into the configuration data area of the 1756sc IF8U module SFS CPS JE Synchronous Copy File 4 Source F8U Config Dest Local1 C Pata Length Rung 1 copies the data received from the module into the user defined input data tag PS Synchronous Copy File Source Local1 l Data 0 Dest IFBU Input Length g2 Rung 2 is used for resetting the module under ladder control Setting the DoRest1 bit to a 1 will send the reset message to the module DoReset E E Type CIP Generic Message Control MsoReset p RO DoReset Rung 3 is used to perform on the fly configuration changes without resetting the module and in many cases without
62. en 8761 or equivalent for RTD inputs shielded Belden 9501 9533 83503 Maximum Wire Size One 2 1 mm 16AWG wire or two 0 25 mm 22 AWG wires per terminal Refer to the thermocouple manufacturer for the correct extension wire Refer to the RTD manufacturer and Chapter 1 of this user s manual EX n Il TS Gc Il 3G c gt Ta gt 65 DEMEKGO 11 ATEX 1105240X ATEX Special Conditions for Safe Use Provision shall be made to prevent the rated voltage being exceeded by the transient disturbances of more than 140 of the peak rated voltage The system shall be mounted in an ATEX certified enclosure with a minimum ingress protection rating of at least IP54 as defined in IEC60529 or EN60529 and used in an environment of not more than pollution degree 2 The enclosure shall be accessible with the use ofa tool Operating Temperature 0 C to 60 C 32 F to 140 F Storage Temperature 40 C to 85 C 40 F to 185 F Relative Humidity 5 to 95 without condensation Certification UL amp CUL approved UL 508 2006 95 EC Low Voltage Directive 2004 108 EC Electromagnetic Compatibility 94 9 EC ATEX CE compliance to EN 61010 1 EN 61131 2 EN61000 6 2 EN61000 6 4 Hazardous Environment Class I Division 2 T5 Hazardous Environment Classification GroupsA B C D Thermocouple Type J 210 C to 1200 C 346 F to 2192 F Thermocouple Type K 270 C to 1372 C 454 F to 2502 F Thermocouple TypeT 270 C to 400 C 454 F
63. er than 1MQ gt Ohm Voltage Thermocouple RTD 250 Q current Temperature Scale C or F Selectable Open Circuit Detection via Underrange Does not apply to 10V range Timeto Detect lt 5 Seconds Open Circuit Input Step Response 010 9596 in 190 msec 50 60 Hz Display Resolution IEEE Hoting Point Overall Module Accuracy See Module Accuracy Tables below 25 C 77 F Overall Module Accuracy See Module Accuracy Tables below 0 C to 60 C 32 F to 140 F Overall Module Drift See Module Accuracy Tables below Module Update Time Dependent upon enabled channels see Update Time Chap 3 Channel Tum Off Time Uptoone module update time Overall Accuracy The accuracy of the module is determined by many aspects of the hardware and software functionality of the module The following attempts to explain what the user can expect in terms of accuracy based on the thermocouple RTD resistance and millivolt volt and milliamp inputs for the IF8u module The accuracies specified as follows include errors due to the cold junction compensation for thermocouples current source errors for RTDs and hardware and software errors associated with the system which depends upon input path RTD accuracies do not include errors due to lead Appendix A Module Specifications 73 resistance imbalance The hardware and software errors include calibration of the system and non linearity of the ADC For the sake of the calculations the resolution
64. ering units The input signal is measured and then scaled based on the user configuration Ch4Data REAL The channel 4 input signal represented in engineering units The input signal is measured and then scaled based on the user configuration Ch5Data REAL The channel 5 input signal represented in engineering units The input signal is measured and then scaled based on the user configuration 54 IM ControlLogix Universal Analog Input Module Ch6Data REAL The channel 6 input signal represented in engineering units The input signal is measured and then scaled based on the user configuration Ch7Data REAL The channel 7 input signal represented in engineering units The input signal is measured and then scaled based on the user configuration CJ Data REAL The cold junction sensor temperature of CJCO in degrees Celsius or Fahrenheit CJ1Data REAL The cold junction sensor temperature of CJC1 in degrees Celsius or Fahrenheit CSTTimestamp 2 dimension array of DINT Timestamp taken at time the input data was sampled and placed in terms of Coordinated System Time which is a 64bit quantity in microseconds coordinated across the rack Must be addressed in 32 bit chunks as an array RollingTimestamp INT Timestamp taken at time the input data was sampled which is in terms of milliseconds relative solely to the individual module Initial Programming Chapter 6 Programming Examples Earlier chapters explained how th
65. esponse as shown below you can see that when the digital filter time constant elapses 63 2 of the total response is reached each additional time constant achieves 63 2 of the remaining response Chapter 5 Channel Configuration Data and Status 49 Amplitude Unfiltered input TA 0 01 sec TA 0 5 sec ait TA sec 16723 0 99 Time in Seconds DigitalFilter 0 32767 ms INT The time constant for a digital first order lag filter applied to the input data for smoothing noise transients 0 no digital filter 100 data will achieve 63 296 of its value in 100ms 50 ControlLogix Universal Analog Input Module Input Tags Fault and Status Reporting Tags The following fault and status reporting and module data sections allow monitoring of faults status and input data from the module These tags can be found withing the IF8U_Input controller tag The 1756 IF8u module multicasts status fault data to the owner listening controller with its channel data The fault data is arranged in such a manner as to allow the user to choose the level of granularity he desires for determining fault conditions Three levels of tags work together to provide an increasing degree of detail as to the specific cause of faults on the module The following tags can be examined in ladder logic to indicate when a fault has occurred Channel Fault Word This word provides underrange overrange and communications fault re
66. gram ladder logic in the sample project and press crtl A to select all the rungs 4 Drag and drop these rungs over and add them to the new routine s ladder logic Note You will need to delete the one blank solid bar rung either at the top or bottom of the routine which was left over from the newly created routine 5 Now add a JSR ladder instruction in your MainRountine which calls this routine Note RSLogix 5000 will verify the ladder logic sample You may receive errors regarding invalid tags You will need to change the slot addressing in the logic to coordinate with the location of the IF8u This completes the installation of module in the system 34 ControlLogix Universal Analog Input Module Configuring module attributes Configuration Tags a The module has settings that are global and channel specific These are accessed via the controller tags Specific information regarding these tag settings may be found in Chapter 5 Global module tags These settings are used globally by the module They control features such as the module autocalibration modes and various other attributes Chapter 4 Programming Your Module 35 Channel Specific Tags These settings control channel specific behavior such as input type range filter frequency units and alarms Specific information regarding these tags may be found in Chapter 5 Data Tags These tags represent the process
67. h 4 76 mm of insulation to expose the ends of the wires At the module end of the cables see figure above extract the drain wire and signal wires remove the foil shield bundle the input cables with a cable strap Connect pairs of drain wires together Channels 0 and 1 Channels 2 and 3 Channels 4 and 5 Channels 6 and 7 Keep drain wires as short as possible Connect the drain wires to the grounding lug on the PLC chassis Connect the signal wires of each channel to the terminal block Important Only after verifying that your connections are correct for each channel trim the lengths to keep them short Avoid cutting leads too short At the source end of cables from mV devices remove the drain wire and foil shield apply shrink wrap as an option 16 ControlLogix Universal Analog Input Module connect to mV devices keeping the leads short Important If noise persists try grounding the opposite end of the cable instead Ground one end only Terminal Block Layout The following figure shows the general terminal block layout The input signal type will determine which pins are used RTD Exc 0 CJCO In In RTD In 0 CJCO In In RTD In 0 4 RTD Exc iRTN ilN 0 4 RTD In RTD Exc 1 DL 4In RTD In In RTD In 1 EDT 4 iRTN ilN In RTD In 1 TE sE 5 RTD Exc ilN 1 LEDs 6 EDT 5
68. ing configuration and where in the control system that input module physically resides An input module s communication or multicasting behavior varies depending upon whether it operates in the local chassis or in a remote chassis The following sections detail the differences in data transfers between these set ups When a module resides in the same chassis as the owner controller the following two configuration parameters will affect how and when the input module multicasts data Real Time Sample RTS configured via Real Time Sample tag Requested Packet Interval RPI configured via I O module properties Real Time Sample RTS Requested Packet Interval RPI Modules ina Remote Chassis Chapter 3 Operation within the System 25 This configurable parameter instructs the module to perform the following operations 1 scan all of its input channels and store the data into on board memory 2 multicast the updated channel data as well as other status data to the backplane of the local chassis This configurable parameter also instructs the module to multicast its channel and status data to the local chassis backplane The RPI instructs the module to multicast the current contents of its on board memory when the RPI expires i e the module does not update its channels prior to the multicast Important The RPI value is set during the initial module configuration using RSLogix 5000 It is important to note that the
69. instructs the module to scan its channels before multicasting You may access the RPI in the Module Properties menu Module Properties Local 1 1756 MODULE 1 1 42 IM ControlLogix Universal Analog Input Module Automatic Calibration Autocalibration is an automated input path calibration This insures best possible accuracy under varying application conditions Autocalibration may be turned on or off When autocalibration is active you may also set the interval at which the calibration occurs DisableCyclicAutocal 0 1 BOOL 0 Module auto calibration is performed on power up reset and reconfiguration as well as according to the CyclicAutocalPeriod 1 Module auto calibration is only performed on module power up reset and reconfiguration Note Changing the following tags via the set attribute all or module reconfiguration message will not cause the auto calibration to be performed upon acceptance of the configuration Alarm Enable ProcessAlarmLatch RateAlarmLatch TenOhmOffset DigitalFilter RateAlarmLimit LowSignal HighSignal LowEngineering HighEngineering LAlarmLimit HighAlarmLimit LLAlarmLimit HHAlarmLimit AlarmDeadband CyclicAutocalPeriod 0 3 INT Perform module auto calibration 0 Only on powerup and reset 1 Every 1 minute 2 Every 10 minutes 3 Every 30 minutes Note Options 1 through 3 are not valid if cyclic autocal is disabled Chapter 5 Channel Configurat
70. ion Data and Status 43 Channel Specific Settings The following settings allow you to configure individual channel parameters Each channel 0 through 7 has these tags Channel On Off DisableChannel 0 1 BOOL 0 Channel is enabled 1 Channel is disabled You may decrease the module sampling time by disabling unused channels Input Range Type RangeType 0 37 INT You can select from a series of operational ranges for each channel on your module The range designates the minimum and maximum signals that are detectable by the module In the case of thermocouple or RTD sensors the selected type dictates the linearization curve of the particular sensor 0 0 05 to 0 05V 0 075 to 0 075V 19 RTD 1000 Ni 618 1 0 15 to 0 15V 0 175 to 0 175V 20 RTD 120 Ni 672 2 20 to SV 0 5 to 5 5V 2 RTD 10 Cu 426 3 1 to 5V 0 5 to 5 5V 22 RTD 6040 Ni Fe 518 4 0 to 10V 0 5 to 10 0V 23 Resistance 0 to 2509 5 10 0 to 10 0V 24 Resistance 0 to 500Q 6 0 to 20mA 0 to 21 5mA 25 Resistance 0 0 2 7 410 20mA 3 5 to 21 5mA 26 Resistance 0 0 2 8 RTD 100 Pt 385 27 Resistance 0 0 2 9 RTD 200Q Pt 385 28 Resistance 0 0 2 10 RTD 500Q Pt 385 29 TC Type J 11 RTD 1000Q Pt 385 30 TC Type 12 RTD 100Q Pt 3916 31 TC Type T 13 RTD 200Q Pt 3916 32 TC Type E 14 RTD 500Q Pt 3916 33 TC Type R 15 RTD 10002 Pt 3916 34 TC Type 5 16 RTD 120 Ni 618 35 TC Type B 17 RTD 200 Ni 618
71. is owner s guide is subject to change without notice Limited Warranty Spectrum Controls warrants that its products are free from defects in material and workmanship under normal use and service as described in Spectrum Controls literature covering this product for a period of 1 year The obligations of Spectrum Controls under this warranty are limited to replacing or repairing at its option at its factory or facility any product which shall in the applicable period after shipment be returned to the Spectrum Controls facility transportation charges prepaid and which after examination is determined to the satisfaction of Spectrum Controls to be thus defective This warranty shall not apply to any such equipment which shall have been repaired or altered except by Spectrum Controls or which shall have been subject to misuse neglect or accident In no case shall the liability of Spectrum Controls exceed the purchase price The aforementioned provisions do not extend the original warranty period of any product which has either been repaired or replaced by Spectrum Controls Who Should Use This Guide What This Guide Covers Related Allen Bradley Documents Preface Read this preface to familiarize yourself with the rest of the owner s guide This preface covers who should use this guide what this guide covers related Allen Bradley documents terms amp abbreviations you should know Use this guide if you de
72. ive wear to contacts on both the module and its mating connectors Worn contacts may create electrical resistance that can affect module operation Compliance to European Union Directives If this product bears the CE marking it is approved for installation within the European Union and EEA regions It has been designed and tested to meet the following directives EMC Directive This product is tested to meet Council Directive 89 336 EEC Electromagnetic Compatibility EMC and the following standards in whole or in part documented in a technical construction file TM ControlLogix Universal Analog Input Module EN 61010 1 and EN 61131 2 EN61000 6 2 2001 EN61000 6 4 2001 EN61010 1 2001 This product is intended for use in an industrial environment Low Voltage Directive This product is tested to meet Council Directive 73 23 EEC Low Voltage by applying the safety requirements of EN 61131 2 Programmable Controllers Part 2 Equipment Requirements and Tests For specific information required by EN61131 2 1994 A11 1996 A12 2000 see the appropriate sections in this publication as well as the following Allen Bradley publications Industrial Automation Wiring and Grounding Guidelines For Noise Immunity publication 1770 4 1 Automation Systems Catalog publication B111 This equipment is classified as open equipment and must be installed mounted in an enclosure during operation as a means of providing safety
73. iversal Analog Input Module The module filter is a built in feature of the Analog to Digital convertor which attenuates the input signal beginning at the specified frequency This feature is used on a individual channel basis In addition to frequency rejection a by product of the filter selection is the minimum sample rate RTS that is available For example the 1000Hz selection will not attenuate any frequencies less than 1000Hz and will allow sampling of all 8 channels within 38ms But the 10Hz selection will reject all frequencies above 10Hz and will only allow sampling all 8 channels within 988ms ADCFilter 0 4 SINT Analog to digital converter ADC filter value The signal read by the ADC is filtered prior to being available to the user 0 2 50 60Hz 1 10Hz 2 100Hz 3 250Hz 4 1 000Hz Digital Filter The digital filter smoothes input data noise transients on each input channel This value specifies the time constant for a digital first order lag filter on the input It is specified in units of milliseconds A value of 0 disables the filter The digital filter equation is a classic first order lag equation t Yn 1 2 1 E ALTA X 1 Yn present output filtered peak voltage PV Yn 1 previous output filtered PV At module channel update time seconds TA digital filter time constant seconds Xn present input unfiltered PV Using a step input change to illustrate the filter r
74. l chromium silicon alloy vaporize out of solution and alter the calibration In addition their use in atmospheres with low but not negligible oxygen content is not recommended since it can lead to changes in calibration due to the preferential oxidation of chromium in the positive thermoelement Nevertheless Wang and Starr 49 studied the performances of type N thermocouples in reducing atmospheres as well as in stagnant air at temperatures in the 870 C to 1180 C range and found them to be markedly more stable thermoelectrically than type K thermocouples under similar conditions Appendix B Thermocouple Descriptions 89 The performance of type N thermocouples fabricated in metal sheathed compacted ceramic insulated form also has been the subject of considerable study Anderson and others 51 Bentley and Morgan 52 and Wang and Bediones 53 have evaluated the high temperature thermoelectric stability of thermocouples insulated with magnesium oxide and sheathed in Inconel and in stainless steel Their studies showed that the thermoelectric instabilities of such assemblies increase rapidly with temperature above 1000 C It was found also that the smaller the diameter of the sheath the greater the instability Additionally thermocouples sheathed in Inconel showed substantially less instability above 1000 C than those sheathed in stainless steel Bentley and Morgan 52 stressed the importance of using Inconel sheathing with a very l
75. l be compensated with the default 25 degC value plus CJCOffset Note 2 thermistors have been provided with the module to be installed on your terminal block if cold junction compensation is to be used TempMode 0 1 BOOL 0 Temperatures for thermocouples RTDs and the cold junction thermistors will be displayed in degrees Celsius Chapter 5 Channel Configuration Data and Status 39 1 Temperatures for thermocouples RTDs and the cold junction thermistors will be displayed in degrees Fahrenheit CJ Offset 25 to 65 degC REAL 45 to 117 degF A temperature offset added to the cold junction compensation temperature values This is interpreted as degrees C if the TempMode 0 and degrees F if the TempMode 1 Module Sampling Time The universal module update time is defined as the time required for the module to sample and convert the input signals of all enabled input channels and make the resulting data values available to the processor The sample time is influenced by the input type filter frequency CJC acquisition if enabled and autocal configuration settings For example when thermocouples are selected it is necessary to perform a cold junction compensation CJC measurement to obtain best possible accuracy This CJC measurement occurs in a systematic fashion and adds approximately 26ms to the update time The following tables illustrate the components used to calculate typical channel update times Overhead 5 m
76. ll JEStirratiGm ControlLogix Universal Analog Input Module Using Module Indicators to Troubleshoot Chapter 7 Troubleshooting The universal analog I O module has indicators which provide indication of module status ControlLogix modules use the following LED This display Means Take this action OK Steady GreenLight The inputs are being multicast None OK Flashing Green Light The module has passed internal None diagnostics but is not currently performing connected communication eK Flashing Red Light Previously establisched communication Check controller has timed out and chassis communications R Steady Red Light Itis likely the module should be replaced See below CAL Flashing Green Light The module is in calibration mode None Under fault conditions the IF8u will communicate a particular error via a LED blink code A description ofthe fault conditions and LED blink codes is listed below OK LED CAL LED Fault Status RED 3 Blinks Major Nonrecoverable EEPROM Fault Send in Module for Repair RED 4Blinks Major Nonrecoverable Serial Number not programmed Send in Module for Repair RED 5Blinks Major Nonrecoverable Boot code section has failed the CRC check Send in Module for Repair RED 6Blinks Major Recoverable Application code section has failed the CRC check Try re programming the module firmware Ifcondition persists send module in for repair RED 9 Blinks Major Nonrecover
77. low this value It will clear if not latched if it is above this level plus the AlarmDeadband amount HHAlarmLimit REAL A high high alarm will activate if the value of the scaled input is at or above this value It will clear if not latched if it is below this level plus the AlarmDeadband amount AlarmDeadband REAL A value used for determining when an alarm condition goes away See it s use in the above alarm tags Input Signal Scaling With scaling you change a quantity from one notation to another When you scale the module you must choose two points along the module s operating range and apply low and high values to those points For example you can cause a 4mA input to display 0 and a 20mA input to display 10096 Scaling causes the module to return data to the controller so that 4mA returns a value of 0 in engineering units and 20mA returns a value of 100 in engineering units The module may operate with values beyond the 4mA to 20mA range If an input signal beyond the low and high signals is present at the module e g 3mA that data will be represented in terms of the engineering units set during scaling For example Configuration RangeType 6 0 20mA LowSignal 4 4mA HighSignal 20 20mA LowEngineering 0 0 HighEngineering 100 100 Note If the signal and engineering range are left at zero the default range is utilized Refer to pages 2 and 3 for valid signal and engineering ranges
78. mV 175 to 175 mV 0 to 5 0 V 0 5 to 5 5 V 1 0to 5 0 V 0 5 to 5 5 V Oto 10 0 V 0 5 to 10 0 V 10 0 to 10 0 V 10 0 to 10 0 V Table 1 4 Current Input Ranges 4to20mA 3 5t0421 5mA 0to20mA 0to 21 5mA Table 1 5 Resistance Input Range 010 250 Ohms 0 to 500 Ohms Oto 1000 Ohms 0 to 2000 Ohms 0 to 3000 Ohms 0 to 4000 Ohms All eight input channels are individually configurable for RTD resistance thermocouple millivolt volt or milliamp input types Each input channel provides wire off input over range and under range detection and indication when enabled The module fits into any single slot for I O modules in a ControlLogix modular system The module has a unique generic profile which may be configured using your RSLogix 5000 programming software The module utilizes one removable terminal block that provides connections for the eight input channels There are two cold junction compensation CJC sensors that compensate for the cold junction at ambient temperature rather than at freezing 0 C There are eight current sources for supplying the RTD or resistance sensors The module is configured through RSLogix 5000 software defining RTD resistance current or voltage input paths 4 ControlLogix Counter Module Diagnostic LEDs System Overview Table 1 6 Hardware Features Hardware Function OK LED Displays communication and fault status of the module Cal LED Displays a fault con
79. material as KP The negative thermoelement EN is the same material as TN The low temperature research 8 by members of the NBS Cryogenics Division showed that type E thermocouples are very useful down to liquid hydrogen temperatures n b p about 20 3 K where their Seebeck coefficient is about 8uV C They may even be used down to liquid helium temperatures 4 2 K although their Seebeck coefficient becomes quite low only about 2uV C at 4 K Both thermoelements of type E thermocouples have a relatively low thermal conductivity good resistance to corrosion in moist atmospheres and reasonably good homogeneity For these three reasons and their relatively high Seebeck coefficients type E thermocouples have been recommended 8 as the most useful of the letter designated thermocouple types for low temperature measurements For measurements below 20 K the non letter designated thermocouple KP versus gold 0 07 at iron is recommended The properties of this thermocouple have been described by Sparks and Powell 12 Type E thermocouples also have the largest Seebeck coefficient above 0 C for any of the letter designated thermocouples For that reason they are being used more often whenever environmental conditions permit Type E thermocouples are recommended by the ASTM 5 for use in the temperature range from 200 C to 900 C in oxidizing or inert atmospheres If used for extended times in air above 500 C heavy gage wires are re
80. mocouple Descriptions 91 14 Potts J F Jr McElroy D L The effects of cold working heat treatment and oxidation on the thermal emf of nickel base thermoelements Herzfeld C M Brickwedde F G Dahl A I Hardy J D ed Temperature Its Measurement and Control in Science and Industry Vol 3 Part 2 New York Reinhold Publishing Corp 1962 243 264 15 Burley N A Ackland R G The stability of the thermo emf temperature characteristics of nickel base thermocouples Jour of Australian Inst of Metals 12 1 23 31 1967 16 Burley N A Nicrosil and nisil Highly stable nickel base alloys for thermocouples Temperature Its Measurement and Control in Science and Industry Vol 4 Plumb H H ed Pittsburgh Instrument Society of America 1972 1677 1695 17 Wang T P Starr C D Electromotive force stability of nicrosil nisil Journal of Testing and Evaluation 8 4 192 198 1980 18 Starr C D Wang T P Effect of oxidation on stability of thermocouples Proceedings of the American Society for Testing and Materials Vol 63 1185 1194 1963 19 Bentley R E Short term instabilities in thermocouples containing nickel based alloys High Temperatures High Pressures 15 599 611 1983 20 Kollie T G Horton J L Carr K R Herskovitz M B Mossman C A Temperature measurement errors with type K Chromel vs Alumel thermocouples due to short ranged ordering in Chromel Rev Sci I
81. module from the front away from the backplane connector Do not touch backplane connector pins Keep the module in its static shield container when not in use or during shipment Failure to observe these precautions can degrade the module s performance or cause permanent damage SIM 10 ControlLogix Universal Analog Input Module Power Requirements Module Installation and Removal The module receives its power through the ControlLogix chassis backplane from the fixed or modular 5 VDC and 24 VDC chassis power supply The maximum current drawn by the module is shown in the table below Table 2 1 Maximum current drawn by the module 5VDC Amps 24VDC Amps 0 230 0 075 Using your module in the ControlLogix System Place your module in any slot of a ControlLogix modular or modular expansion chassis Ananalog I O module translates an analog signal into or from a corresponding digital representation which controllers can easily operate on for control purposes A ControlLogix I O module mounts in a ControlLogix chassis and uses a Removable Terminal Block RTB to connect all field side wiring Before you install and use your module you should have already installed and grounded a 1756 chassis and power supply ordered and received an RTB for your application Important RTBs are not included with your module purchase Specify Allen Bradley Part Number 1756 TBCH 36 position screw terminals 1756 TBS6H
82. module will reset the RPI timer each time an RTS is performed This operation dictates how and when the owner controller in the local chassis will receive updated channel data depending on the values given to these parameters If the RTS value is less than or equal to the RPI each multicast of data from the module will have updated channel information In effect the module is only multicasting at the RTS rate If the RTS value is greater than the RPI the module will multicast at both the RTS rate and the RPI rate Their respective values will dictate how often the owner controller will receive data and how many multicasts from the module contain updated channel data Note Even though data may be transfered at the RPI rate the data will be indentical to the previous RTS data transfer If an input module resides in a networked chassis the role of the RPI and the module s RTS behavior change slightly with respect to getting data to the owner The RPI and RTS intervals still define when the module will multicast data within its own chassis as described in the previous section but only the value of the RPI determines how often the owner controller will receive it over the network When an RPI value is specified for an input module in a remote chassis in addition to instructing the module to multicast data within its own chassis the RPI also reserves a spot in the stream of data flowing across the ControlNet network The timing of
83. moist atmospheres and may become brittle type J thermocouples are not recommended for use below 0 C In addition they should not be used unprotected in sulfurous atmospheres above 500 C The positive thermoelement iron is relatively insensitive to composition changes under thermal neutron irradiation but does exhibit a slight increase in manganese content The negative thermoelement a copper nickel alloy is subject to substantial composition changes under thermal neutron irradiation since copper is converted to nickel and zinc Iron undergoes a magnetic transformation near 769 C and an alpha gamma crystal transformation near 910 C 6 Both of these transformations especially the latter seriously affect the thermoelectric properties of iron and therefore of type J thermocouples This behavior and the rapid oxidation rate of iron are the main reasons why iron versus constantan thermocouples are not recommended as a standardized type above 760 C If type J thermocouples are taken to high temperatures especially above 900 C they will lose the accuracy of their calibration when they are recycled to lower temperatures If type J thermocouples are used in air at temperatures above 760 C only the largest wire AWG 8 3 3mm should be used and they should be held at the measured temperature for 10 to 20 minutes before readings are taken The thermoelectric voltage of the type J thermocouples may change by as K Type Thermocouples Ap
84. n M Anderko K Constitution of binary alloys New York McGraw Hill Book Co 1958 7 ASTM American Society for Testing and Materials Standard E230 87 1992 Annual Book of ASTM Standards Vol 14 03 Philadelphia ASTM 1992 102 230 8 Sparks L L Powell R L Hall W J Reference tables for low temperature thermocouples Natl Bur Stand U S Monogr 124 1972 June 61p 9 Starr C D Wang T P Effect of oxidation on stability of thermocouples Proceedings of the American Society for Testing and Materials Vol 63 1185 1194 1963 10 Roeser W F Dahl A I Reference tables for iron constantan and copper constantan thermocouples J Res Natl Bur Stand U S 20 337 355 RP1080 1938 March 11 Dahl A I Stability of base metal thermocouples in air from 800 to 2200F J Res Natl Bur Stand U S 24 205 224 RP1278 1940 February 12 Sparks L L Powell R L Low temperatures thermocouples KP normal silver and copper versus Au 0 02 at Fe and Au 0 07 at Fe J Res Natl Bur Stand U S 76A 3 263 283 1972 May June 13 Burley N A Hess R M Howie C F Coleman J A The nicrosil versus nisil thermocouple A critical comparison with the ANSI standard letter designated base metal thermocouples Temperature Its Measurement and Control in Science and Industry Vol 5 Schooley J F ed New York American Institute of Physics 1982 1159 1166 Appendix B Ther
85. nges in their calibrations The ultimate useful life of the thermocouples when used at such elevated temperatures is governed primarily by physical problems of impurity diffusion and grain growth which lead to mechanical failure The thermocouple is most reliable when used in a clean oxidizing atmosphere air but may be used also in inert gaseous atmospheres or in a vacuum for Appendix B Thermocouple Descriptions 85 short periods of time However type B thermocouples are generally more suitable for such applications above 1200 C Type S thermocouples should not be used in reducing atmospheres nor in those containing metallic vapor such as lead or zinc nonmetallic vapors such as arsenic phosphorus or sulfur or easily reduced oxides unless they are suitably protected with nonmetallic protecting tubes Also they should never be inserted directly into a metallic protection tube for use at high temperatures The stability of type S thermocouples at high temperatures gt 1200 C depends primarily upon the quality of the materials used for protection and insulation and has been studied by Walker et al 25 26 and by Bentley 29 High purity alumina with low iron content appears to be the most suitable material for insulating protecting and mechanically supporting the thermocouple wires Both thermoelements of type S thermocouples are sensitive to impurity contamination In fact type R thermocouples were developed essentially becau
86. nstrum 33 1029 1040 1962 26 Walker B E Ewing C T Miller R R Study of the instability of noble metal thermocouples in vacuum Rev Sci Instrum 36 601 606 1965 27 Bedford R E Ma C K Barber C R Chandler T R Quinn T J Burns G W Scroger M New reference tables for platinum 1096 rhodium platinum and platinum 13 rhodium platinum thermocouples Temperature Its Measurement and Control in Science and Industry Vol 4 Plumb H H ed Pittsburgh Instrument Society of America 1972 1585 1603 28 Burns G W Strouse G F Mangum B W Croarkin M C Guthrie W F Marcarino P Battuello M Lee H K Kim J C Gam K S Rhee C Chattle M Arai M Sakurai H Pokhodun A L Moiseeva N P Perevalova S A de Groot M J Zhang J Fan K Wu S New reference functions for platinum 10 rhodium versus platinum type S thermocouples based on the ITS 90 Part I and Part II in Temperature Its Measurement and Control in Science and Industry Vol 6 Schooley J F ed New York American Institute of Physics 1992 537 546 29 Bentley R E Changes in Seebeck coefficient of Pt and Pt 10 Rh after use to 1700C in high purity polycrystalline alumina Int J Thermophys 6 1 83 99 1985 30 McLaren E H Murdock E G New considerations on the preparation properties and limitations ofthe standard thermocouple for thermometry Temperature Its Measurement and
87. nstrum 46 1447 1461 1975 21 ASTM American Society for Testing and Materials Standard E1159 87 1992 Annual Book of ASTM Standards Vol 14 03 Philadelphia ASTM 1992 388 389 22 Bedford R E Ma C K Barber C R Chandler T R Quinn T J Burns G W Scroger M New reference tables for platinum 1096 rhodium platinum and platinum 13 rhodium platinum thermocouples Temperature Its Measurement and Control in Science and Industry Vol 4 Part 3 p 1585 Plumb H H ed Pittsburgh Instrument Society of America 1972 23 Burns G W Strouse G F Mangum B W Croarkin M C Guthrie W F Chattle M New reference functions for platinum 13 rhodium versus platinum type R and platinum 30 rhodium versus platinum 6 rhodium type B thermocouples based on the ITS 90 in Temperature Its Measurement and Control in Science and Industry Vol 6 Schooley J F ed New York American Institute of Physics 1992 559 564 92 ControlLogix Universal Analog Input Module 24 Glawe G E Szaniszlo A J Long term drift of some noble and refractory metal thermocouples at 1600K in air argon and vacuum Temperature Its Measurement and Control in Science and Industry Vol 4 Plumb H H ed Pittsburgh Instrument Society of America 1972 1645 1662 25 Walker B E Ewing C T Miller R R Thermoelectric instability of some noble metal thermocouples at high temperatures Rev Sci I
88. o adding any type of I O module You will use your RSLogix 5000 programming software The module is not currently in the pick list ofthis software so you will use the Generic 1756 Module option as your starting point This feature allows you to inport the configuration database into your project and use ladder logic to set the attributes of each tag These settings control features such as the modules input type channel input range data format filter frequency etc You will need to download the sample project from our website and then import this into your program Then you may access the controller tags to configure the module Ladder logic samples are also provided with this sample project The module has a unique set of tag definitions which are used to configure specific features Chapter 5 Channel Configuration Data and Status gives you detailed information about the data content ofthe configuration These values are set using your programming software and ladder logic Before you can use these feature you must first include the module into the project ControlLogix Universal Analog Input Module 1 Open your project and go to the Add I O module menu under controller configuration 2 You will now see the list of all I O modules Select the Generic 1756 I O option 2 Axis Analog Encoder Servo 8 Axis SERCOS Interface Generic 1755 M odule 16 Point 74V 265V AC Output 16 Point 74V 265V AC Isolated Ou
89. odule 4 Specify an RPI interval between 10 0 and 750 0 ms Module Properties Local 1 1756 MODULE 1 1 Getting Technical Assistance Declaration of Conformity If you need technical assistance please review the information in Chapter 6 Testing Your Module before calling your local distributor of Spectrum Controls Note that your module contains electronic components which are susceptible to damage from electrostatic discharge ESD An electrostatic charge can accumulate on the surface of ordinary plastic wrapping or cushioning material In the unlikely event that the module should need to be returned to Spectrum Controls please ensure that the unit is enclosed in approved ESD packaging such as static shielding metallized bag or black conductive container Spectrum Controls reserves the right to void the warranty on any unit that is improperly packaged for shipment For further information or assistance please contact your local distributor or call the Spectrum Controls technical Support at USA 440 646 6900 United Kingdom 01908 635230 Australia 800 809 929 or 61 398 990 335 Brazil 55 11 3618 8800 Europe 49 2104 960 333 Declaration available upon request Rockwell Automation Encompass Product Partner 2002 2011 Spectrum Controls Inc All rights reserved Specifications subject to change without notice The Encompass logo andControlLogix are trademarks of Rockwell Au
90. on with the input module Whichever controller s data arrives first establishes a connection When the second controller s data arrives the module compares it to its current configuration data the data received and accepted from the first controller If the configuration data sent by the second controller matches the configuration data sent by the first controller the connection is also accepted If any parameter of the second configuration data is different from the first the module rejects the connection and the user is informed by an error in the software The advantage of multiple owners over a Listen only connection is that now either of the controllers can lose the connection to the module and the module will continue to operate and multicast data to the system because of the connection maintained by the other owner controller Note The previous discussion of multiple owners assues the configuration tag configrevnumber is set to 1 Operation differs is the tag is set to 0 Refer to Chapter 5 for descriptions of this tag s settings You must be careful when changing an input module s configuration data ina multiple owner scenario When the configuration data is changed in one of the owners for example Controller A and sent to the module that configuration data is accepted as the new configuration for the module Controller B will continue to listen unaware that any changes have been made in the module s behavior
91. ontrolLogix Universal Analog Input Module 46 Burley N A Hess M Howie C F Nicrosil and nisil new nickel based thermocouple alloys of ultra high thermoelectric stability High Temperatures High Pressures 12 403 410 1980 47 Burley N A Cocking J L Burns G W Scroger M G The nicrosil versus nisil thermocouple the influence of magnesium on the thermoelectric stability and oxidation resistance of the alloys Temperature Its Measurement and Control in Science and Industry Vol 5 Schooley J F ed New York American Institute of Physics 1982 1129 1145 48 Wang T P Starr C D Nicrosil nisil thermocouples in production furnaces in the 538C 1000F to 1177C 2150F range ISA Transactions 18 4 83 99 1979 49 Wang T P Starr C D Oxidation resistance and stability of nicrosil nisil in air and in reducing atmospheres Temperature Its Measurement and Control in Science and Industry Vol 5 Schooley J F ed New York American Institute of Physics 1982 1147 1157 50 Hess T G Nicrosil nisil high performance thermocouple alloys ISA Transactions 16 3 81 84 1977 51 Anderson R L Lyons J D Kollie T G Christie W H Eby R Decalibration of sheathed thermocouples Temperature Its Measurement and Control in Science and Industry Vol 5 Schooley J F ed New York American Institute of Physics 1982 977 1007 52 Bentley R E Morgan T L Ni based
92. or each slot in the chassis 1 Insert the U shaped band with the longer side near the terminals Push the band onto the module until it snaps into place 14 ControlLogix Universal Analog Input Module Figure 2 2 Terminal block diagram with keying U shaped y if Keying i 4 Wiring Your Module Follow these guidelines to wire your input signal cables Power input and output I O wiring must be in accordance with Class I Division 2 wiring methods Article 501 4 b of the National Electrical Code NFPA 70 and in accordance with the authority having jurisdiction Peripheral equipment must be suitable for the location in which it is used Route the field wiring away from any other wiring and as far as possible from sources of electrical noise such as motors transformers contactors and ac devices As a general rule allow at least 6 in about 15 2 cm of separation for every 120 V of power Routing the field wiring in a grounded conduit can reduce electrical noise further Ifthe field wiring must cross ac or power cables ensure that they cross atright angles Tolimitthe pickup ofelectrical noise keep thermocouple RTD millivolt and milliamp signal wires as far from power and load lines as possible Forimproved immunity to electrical noise use Belden 8761 shielded twisted pair or equivalent wire for millivolt sensors or use shielded twisted pair thermocouple extension lead wire specifie
93. ot apply to thermocouples having compacted mineral oxide insulation Platinum 30 Rhodium Alloy Versus Platinum 6 Rhodium Alloy Thermocouples This type is sometimes referred to by the nominal chemical composition of its thermoelements platinum 30 rhodium versus platinum 6 rhodium or 30 6 The positive BP thermoelement typically contains 29 60 0 2 rhodium and the negative BN thermoelement usually contains 6 12 0 02 rhodium The effect of differences in rhodium content are described later in this section An industrial consensus standard 21 ASTM E1159 87 specifies that rhodium having a purity of 99 98 shall be alloyed with platinum of 99 99 purity to produce the thermoelements This consensus standard 21 describes the purity of commercial type B materials that are used in many industrial thermometry applications that meet the calibration tolerances described later in this section Both thermoelements will typically have significant impurities of elements such as palladium iridium iron and silicon 38 Studies by Ehringer 39 Walker et al 25 26 and Glawe and Szaniszlo 24 have demonstrated that thermocouples in which both legs are platinum rhodium alloys are suitable for reliable temperature measurements at high temperatures Such thermocouples have been shown to offer the following distinct advantages over types R and S thermocouples at high temperatures 1 improved stability 2 increased mechanic
94. ow manganese content to achieve the most stable performance The use of special Ni Cr based alloys for sheathing to improve the chemical and physical compatibility with the thermoelements also has been investigated by Burley 54 56 and by Bentley 57 60 Neither thermoelement of a type N thermocouple is extremely sensitive to minor differences in heat treatment provided that the treatment does not violate any of the restrictions mentioned above For most general applications they may be used with the heat treatment routinely given by the wire manufacturer Bentley 61 62 however has reported reversible changes in the Seebeck coefficient of type NP and NN thermoelements when heated at temperatures between 200 C and 1000 C These impose limitations on the accuracy obtainable with type N thermocouples The magnitude of such changes was found to depend on the source of the thermoelements Consequently when the highest accuracy and stability are sought selective testing of materials as well as special preparatory heat treatments beyond those given by the manufacturer will usually be necessary Bentley s articles 61 62 should be consulted for guidelines and details ASTM Standard E230 87 in the 1992 Annual Book of ASTM Standards 7 specifies that the initial calibration tolerances for type N commercial thermocouples be 2 2 C or 0 75 whichever is greater between 0 C and 1250 C Type N thermocouples can also be supplied to meet
95. pect the terminal connections for tightness Loose connections may cause a malfunctioning of the SLC system or damage to the components WARNING POSSIBLE LOOSE CONNECTIONS Before inspecting connections always ensure that incoming power is OFF Failure to observe this precaution can cause personal injury and equipment damage Safety is always the most important consideration Actively think about the safety of yourself and others as well as the condition of your equipment The following are some things to consider Indicator Lights When the module status LED on your module is illuminated your module is receiving power Activating Devices When Troubleshooting Never reach into a machine to activate a device the machine may move unexpectedly Use a wooden stick 66 ControlLogix Universal Analog Input Module Standing Clear Of Machinery When troubleshooting a problem with any ControlLogix system have all personnel remain clear of machinery The problem may be intermittent and the machine may move unexpectedly Have someone ready to operate an emergency stop switch CAUTION POSSIBLE EQUIPMENT OPERATION Never reach into a machine to actuate a switch Also remove all electrical power at the main power disconnect switches before checking electrical connections or inputs outputs causing machine motion Failure to observe these precautions can cause personal injury or equipment damage
96. pendix B Thermocouple Descriptions 77 much as 40uV or 0 6 C equivalent per minute when first brought up to temperatures near 900 C ASTM Standard E230 87 in the 1992 Annual Book of ASTM Standards 7 specifies that the initial calibration tolerances for type J commercial thermocouples be 2 2 C or 0 75 whichever is greater between 0 C and 750 C Type J thermocouples can also be supplied to meet special tolerances which are equal to approximately one half the standard tolerances given above Tolerances are not specified for type J thermocouples below 0 C or above 750 C The suggested upper temperature limit of 760 C given in the above ASTM standard 7 for protected type J thermocouples applies to AWG 8 3 25mm wire For smaller diameter wires the suggested upper temperature limit decreases to 590 C for AWG 14 1 63mm 480 C for AWG 20 0 81mm 370 C for AWG 24 or 28 0 51mm or 0 33mm and 320 C for AWG 30 0 25mm These temperature limits apply to thermocouples used in conventional closed end protecting tubes and they are intended only as a rough guide to the user They do not apply to sheathed thermocouples having compacted mineral oxide insulation Nickel Chromium Alloy Versus Nickel Aluminum Alloy Thermocouples This type is more resistant to oxidation at elevated temperatures than types E J or T thermocouples and consequently it finds wide application at temperatures above 500 C The positive thermoelement
97. ple project and select edit 2 Right click on the Controller Tags item of your project and select edit 3 Scroll down to the Controller tags ofthe sample project and select all the tags by highlighting them 4 Drag and drop these tags into your project Note IF8u Config and IF8u Input contain the configuration data and status tags for the IF8u module The other tags are used for performing various functions to your module via ladder logic Note Be sure all tags are displayed before moving them Select Display All from the Edit drop down window Note The Local 3 I and Local 3 C tags are not copied f RSLogix 5000 IF8u Sample 1756 L1 MainProgram MainRoutine Chapter 4 Programming Your Module 33 4 Create a new ladder logic routine in your project f5 RSLogix 5000 Demo in Your Project ACD 1756 L1 MainProgram IF inl xi B File Edit View Search Logic Communications Tools Window Help amp x Bi Fie Edit View Search Logic Communications Tools Window Help x s sele 7 o sisle alsia e of Ev sl k Offline fl F RUN No Forces b E No Edits Ale oa 5 A Path 48 Offline D j en sp eee allle 6 a Ee TB H Favorites KEEK imaa A NoForces Py E oK 4 Apaj e e e T Nravorites KBtX Tmercouter A
98. porting It s tag name is ChannelFaults Module Fault Word This word provides fault summary reporting Its tag name is ModuleFaults Channel Status Words These words provide individual channel underrange and overrange fault reporting for process alarms rate alarms and calibration faults Its tag name is ChannelStatus ChannelFaults Bits 0 7 corresponding to channels 0 7 respectively will be set if the channle is over range or under range Any bits set in ChannelFaults sets the ModuleFaults word InGroupFault and AnalogGroupFault bits All bits of the ChannelFaults tag will be set 16 FFFF when a communication fault has occured and its owner controller ChOFault ChiFault Ch2Fault Ch3Fault Ch4Fault Ch5Fault Ch6Fault Ch7Fault Ch x Fault Individual channel fault status bit This indicates an overrange or underrange condition on the channel These bits are also set by the controller if communications are lost with the I O module Chapter 5 Channel Configuration Data and Status 51 ModuleFaults Below are a collection of all module level fault bits Bits are defined as follows 0 7 are unused 8 CJOverrange 9 CJUnderrange 10 unused 11 CalFault set if IFSU Input ChannelStatus x CalFault bit is set 12 unused 13 unused 14 InGroupFault 15 AnalogGroupFault Any bit set in the ChannelFaults word sets both the InGroupFault and AnalogGroupFault bits AnalogGroupFault Indic
99. protection CAUTION POSSIBLE EQUIPMENT OPERATION ATTENTION The module is designed to support Removal and Insertion Under Power RIUP However when you remove or insert an RTB with field side power applied unintended machine motion or loss of process control can occur Exercise extreme caution when using this feature WARNING The 1756sc IF8U module is to be used only with the Allen Bradley 1756 ControlLogix System Chapter 2 Installing And Wiring Your Module 13 To insert your module into the rack follow these steps 1 Align the circuit board of your module with the card guides at the top and bottom of the chassis Figure 2 1 Module insertion into a rack 1 Align circuit board with top chassis guides 2 Align circuit board with Slide module into chassis bottom chassis quides until module tabs click 2 Key the RTB in positions that correspond to unkeyed module positions Insert the wedge shaped tab on the RTB with the rounded edge first Push the tab onto the RTB until it stops Keying the Removable Terminal Block Key the RTB to prevent inadvertently connecting the incorrect RTB to your module When the RTB mounts onto the module keying positions will match up For example if you place a U shaped keying band in position 4 on the module you cannot place a wedge shaped tab in 4 on the RTB or your RTB will not mount on the module We recommend that you use a unique keying pattern f
100. quency The frequency at which the input signal is attenuated 3 dB by the digital filter Frequency components of the input signal that are below the cut off frequency are passed with under 3 dB of attenuation for low pass filters dB decibel A logarithmic measure of the ratio of two signal levels Digital filter A low pass mathmatic single order filter applied to the A D signal The digital filter provides high frequency noise rejection Effective resolution The number of bits in the channel data word that do not vary due to noise Local System A control system with I O chassis within several feet of the processor LSB least significant bit The bit that represents the smallest value within a string of bits Mulitplexer A switching system that allows several input signals to share a common A D converter Normal mode rejection differential mode rejection A logarithmic measure in dB of a device s ability to reject noise signals between or among circuit signal conductors but not between the equipment grounding conductor or signal reference structure and the signal conductors Module update time See channel update time Remote system A control system where the chassis can be located several thousand feet from the processor chassis Chassis communication is via the 1756 DHRIO and 1756 ENET Adapter Resolution The smallest detectable change in a measurement typically expressed in engineering
101. r the Module Reconfigure message Set Attribute All message Message Configuration MsgSetAttributeAll x Configuration Communication Tag Message Type CIP Genetic dis Custom Source Element IF8l Config bd ype Source Length 5 24 Bytes Service Code 4c Hex Class a Hex D E Instance 225 Attribute 0 Hex x New Tag O Enable Enable Waiting O Start O Done Done Length 0 2 Error Code Extended Error Code Timed Out gt Error Path Error Text Cancel Apply Help Module Reconfigure Message Message Configuration MsgReconfig lt Configuration Communication Tag Message Type Module Reconfigure Update module configuration without interrupting the connection O Enable 1 Enable Waiting O Start 2 Done Done Length 0 2 Error Code Extended Error Code Timed Out Error Path IF8u Error Text Cancel Apply Help Chapter 6 Ladder Program Examples 59 Rung 4 This rung describes how to unlatch process alarms Service Type Service Code Class Attribute Unlatch All Alarms l 4b a 0 Unlatch Analog High Alarm 4b a 6c Unlatch Analog High High Alarm l 4b a be Unlatch Analog Low Alarm 4b a 6b Unlatch Analog Low Low Alarm 4b a 6d Unlatch Rate Alarm lI 4b a 6f Message Configuration UL Ch All Unlatch All Alarms I ej Source Element Channel number 1 1 Ch0 8 Ch7 etc SBUTGE Teen 2 7 f
102. re at elevated temperatures gt 1200 C in vacuum air and argon atmospheres have on the thermoelectric voltages of type R thermocouples ASTM Standard E230 87 in the 1992 Annual Book of ASTM Standards 7 specifies that the initial calibration tolerances for type R commercial thermocouples be 1 5 C or 0 25 whichever is greater between 84 ControlLogix Universal Analog Input Module S Type Thermocouples 0 C and 1450 C Type R thermocouples can be supplied to meet special tolerances of 0 6 C or 0 1 whichever is greater The suggested upper temperature limit 1480 C given in the ASTM standard 7 for protected type R thermocouples applies to AWG 24 0 51mm wire This temperature limit applies to thermocouples used in conventional closed end protecting tubes and it is intended only as a rough guide to the user It does not apply to thermocouples having compacted mineral oxide insulation Platinum 10 Rhodium Alloy Versus Platinum Thermocouples This type is often referred to by the nominal chemical composition of its positive SP thermoelement platinum 10 rhodium The negative SN thermoelement is commercially available platinum that has a nominal purity of 99 99 21 An industrial consensus standard ASTM E1159 87 specifies that rhodium having a nominal purity of 99 98 shall be alloyed with platinum of 99 99 purity to produce the positive thermoelement which typically contains 10 00 0 05 rhodium
103. re configuration select a cable that has a consistent impedance throughout its entire length For 2 wire configurations we recommend that you use Belden 9501 or equivalent For 3 wire configurations we recommend that you use Belden 9533 or equivalent for short installation runs less than 100 feet or use Belden 83503 or equivalent for longer runs greater than 100 feet and in high humidity environments Chapter 1 Module Overview Table 1 8 Cable Specifications Description Belden 9501 Belden 9533 Belden 83503 For 2 wireRTDsand 3 wireRTDsand 3 wire RTDs and potentiometers potentiometers Short potentiometers When used Long runs less than 100 feet runs greater than 100 ControlLogix Counter Module Electrostatic Damage Chapter 2 Installing And Wiring Your Module Read this chapter to install and wire your module This chapter covers avoiding electrostatic damage determining power requirements installing the module wiring signal cables to the module s terminal block Electrostatic discharge can damage semiconductor devices inside this module if you touch backplane connector pins Guard against electrostatic damage by observing the following precautions CAUTION ELECTROSTATICALLY SENSITIVE COMPONENTS Before handling the module touch a grounded object to rid yourself of electrostatic charge When handling the module wear an approved wrist strap grounding device Handle the
104. rence from radiated electrical noise For This Type of Device We Recommend This Cable or equivalent Thermocouple Type J EIL Corp J20 5 502 Thermocouple Type K EIL Corp K20 5 510 Thermocouple Type T EIL Corp T20 5 502 Other Thermocouple Types consult with EIL Corp or other manufacturers mV V mA devices Belden 8761 shielded twisted pair Compatibility with RTD and Resistance devices and cables The module is compatible 100 Platinum 385 200 Platinum 385 500 Platinum 385 1000 Platinum 385 100 Platinum 3916 200 Platinum 3916 500 Platinum 3916 1000 Platinum 3916 10 Copper 426 120 Nickel 618 and 120 Nickel 672 RTD types and resistance inputs and 3 possible wire types 2 wire 3 wire or 4 wire Each RTD input individually supports three input pins on the terminal block one excitation current source EXC one sense positive IN and one sense negative IN Only those pins are connected that are required by the selected RTD or resistance wire type For 2 3 or 4 wire configurations the module can support a maximum combined cable length associated with an overall cable impedance of 25 ohms or less without exceeding its input limitations The accuracy specifications provided herein do not include errors associated with unbalanced cable impedance Since the operating principle ofthe RTD and resistance inputs is based on the measurement of resistance take special care in selecting your input cable For 2 wire or 3 wi
105. rer P rrr edere o eee tnr do Dad odes V Related Allen Bradley Documents pp V Table A Related Allen Bradley document pe M Terms amp Abbreviations You Should Know e vi General DESCON ree ette cer riae m POUR D ive re ee ER reve rv E 1 Detailed Specifications ndun diei cem teh em ePi eem n rr e e d 2 Hardware Features anao cbe neento aedem oa baibande iT n d e dua des 3 Diagnostic LEDS rrt REIR EROR ERE ERE RR EET NE E SySIem OVOLVIeW God ute tede erii dria axe tieaeetdste eiu tetut runs 4 System Opera m secede veces d oci bei en eerte ebrio n td ture berebu ES 5 Module Operation tak ann Seton tere de e d eri dv EN 5 Compatibility with Thermocouple Current and Millivolt Devices amp Cables 6 Bl ctrostatic Damage icici uoo qae cere oa ERR D Ond as ades 9 Power Requirements i onenan da atu OO EXER EU S 10 Table 2 1 Maximum current drawn by the module RN 10 Module Installation and Removal esee 10 Figure 2 1 Module insertion into a rack sse 13 Figure 2 2 Terminal block diagram with keying 14 Witing Your Module dme RHRORI REPERI ES l4 Preparing and Wiring the Cables ssessssseeeeenen en 15 Terminal Block Layout aos osea eem rae en ct edere 16 Wiring Voltage Current Inputs the IF8u Module eee 17 Wiring RTD or Resistance Sensors to the IF8u Module sss 18 Wiring Thermocouples to the IF8u Modul
106. riable immersion applications to 1100C Sensors and Actuators 16 89 100 1989 59 Bentley R E Irreversible thermoelectric changes in type K and type N thermocouple alloys within nicrosil sheathed MIMS cable J Phys D 22 1908 1915 1989 60 Bentley R E Thermoelectric behavior of Ni based ID MIMS thermocouples using the nicrosil plus sheathing alloy Temperature Its Measurement and Control in Science and Industry Vol 6 Schooley J F ed New York American Institute of Physics 1992 585 590 61 Bentley R E Thermoelectric hysteresis in nicrosil and nisil J Phys E Sci Instrum 20 1368 1373 1987 62 Bentley R E Thermoelectric hysteresis in nickel based thermocouple alloys J Phys D 22 1902 1907 1989 ControlLogix Universal Analog Input Module Thermocouple Types Appendix C Using Grounded Junction Ungrounded Junction and Exposed Junction Thermocouples This appendix describes the types of thermocouples available and explains the trade offs in using them with the IF8u module There are three 3 types of thermocouple junctions Grounded Junction The measuring junction is physically connected to the protective sheath forming a completely sealed integral junction If the sheath is metal or electrically conductive then there is electrical continuity between the junction and sheath The junction is protected from corrosive or erosive conditions The response time approache
107. s This must be included in all calculations and represents backplane communication and other service routines within the module Filter Frequency The channel filter frequency will impact timing The following table shows associated time adders based on frequency selection Filter Additional Time 10Hz 125 ms per channel 50 60Hz 26 ms per channel 100Hz 18 ms per channel 250Hz 10 ms per channel IkHz 6 ms per channel 40 IM ControlLogix Universal Analog Input Module Input Type Each input type has a specific settling time Select each channel input type and add the time value Time ms Type Tag RangeType 0 All voltage current and thermocouple types 3 100 Pt 385 8 3 100 Pt 392 12 3 120_Ni_618 16 3 120_Ni_672 20 3 10_Cu 426 21 3 604 NiFe 518 22 3 0 250 Ohm 23 3 0 500 Ohm 4 4 200_Pt_385 9 4 500_Pt_385 10 4 200_Pt_392 13 4 500_Pt_392 14 4 200 Ni 618 17 4 500 Ni 618 18 4 0 1000 Ohm 25 4 0 2000 Ohm 26 8 1000 Pt 385 1 8 1000 Pt 392 15 8 1000 Ni 618 19 8 0 3000 Ohm 2 8 0 4000 Ohm 28 Example 1 4 channels with 200 Ohm PT 385 RTD Input Type 9 at 100Hz filter 18ms 4ms 22ms 4 channels 88ms 2 channels of voltage at Ikhz 2 6ms 12ms 2 thermocouples at 250Hz 2 10ms 20ms Total 5ms overhead 26ms CJC 88ms 12ms 20ms 151ms Actual measured 158ms Example 2 8 channels 0 4000 ohm type 28 at 250Hz 10ms 8ms 18ms 8 144ms 5ms 149ms Actual measured 1
108. s that of the exposed junction type Ungrounded Junction The measuring junction is electrically isolated from the protective metal sheath This may also be referred to as an insulated junction This type is often used where noise would affect the reading and for frequent or rapid temperature cycling The response time is longer than the grounded junction Exposed Junction The measuring junction does not have a protective metal sheath so it is exposed This junction style provides the fastest response time but leaves the thermocouple wires unprotected against corrosive or mechanical damage 98 ControlLogix Universal Analog Input Module Isolation The illustration that follows shows each of the three 3 thermocouple types Grounded Junction Measuring Junction is Metal Sheath connected to sheath Extension Wire N Ungrounded Insulated Junction Measuring Junction is isolated from sheath Exposed Junction Measuring Junction has no sheath N The IF8u module provides 12 5 VDC electrical isolation channel to channel 500 VDC electrical isolation channel to chassis ground and 500 VDC electrical isolation channel to backplane Care must be taken when choosing a thermocouple type and connecting it from the environment being measured to the IF8u module If adequate precautions are not taken for a given thermocouple type the electrical isolation ofthe IF8u module may be compromised Grounded Junction
109. s an input channel the module tests that data for a fault i e over range or under range condition If it detects an overrange or under range condition the module sets a unique bit in the status tags The module s input circuitry consists of eight differential analog inputs multiplexed into an A D converter The A D converter reads the analog input signals and converts them to floating point values The input circuitry also continuously samples the CJC sensors if not disabled and compensates for temperature changes for thermocouples at the cold junction terminal block The sensors must be Spectrum Controls supplied temperature sensors The module will not accept other CJC sensor inputs and thermocouple inputs will not function properly if incorrect CJC sensors are used Two CJC sensors are shipped with each module 6 ControlLogix Counter Module Compatibility with Thermocouple Current and Millivolt Devices amp Cables The module is compatible with the following standard types of thermocouples B E J K N R S T and C and extension wire Refer to appendices B and C for details The module is also compatible with a variety of voltage and current devices with an output of 50 150 mV 0 5V 1 5V 0 10V 10V 0 20mA and 4 20mA To minimize interference from radiated electrical noise we recommend twisted pair and highly shielded cables such as the following Table 1 7 Recommendations to minimize interfe
110. s are apparently not grossly affected by oxidation since negligible changes in the thermoelectric voltage were observed at NBS 10 for AWG 12 18 and 22 type TP thermoelements during 30 hours of heating in air at 500 C At this temperature the type TN thermoelements have good resistance to oxidation and exhibit only small voltage changes heated in air for long periods of time as shown by the studies of Dahl 11 Higher operating temperatures up to at least 800 C are possible in inert atmospheres where the deterioration of the type TP thermoelement is no longer a problem The use of type T thermocouples in hydrogen atmospheres at temperatures above about 370 C is not recommended since type TP thermoelements may become brittle Type T thermocouples are not well suited for use in nuclear environments since both thermoelements are subject to significant changes in composition under thermal neutron irradiation The copper in the thermoelements is converted to nickel and zinc Because of the high thermal conductivity of type TP thermoelements special care should be exercised when using the thermocouples to ensure that the measuring and reference junctions assume the desired temperatures ASTM Standard E230 87 in the 1992 Annual Book of ASTM Standards 7 specifies that the initial calibration tolerances for type T commercial thermocouples be 1 C or 0 75 whichever is greater between 0 C and 350 C and 1 C or 1 5 whichever is
111. s precaution can cause unintended equipment operation and damage SIM ControlLogix Universal Analog Input Module Ownership and Connections Using RSNetWorx and RSLogix 5000 Chapter 3 Operation within the System 23 Operation Within the ControlLogix System This chapter describes how the 1756sc IF8u analog module works within the ControlLogix system This chapter covers Ownership and connections to the module Direct connections e Listen only mode Configuration changes with multiple owners Every I O module in the ControlLogix system must be owned by a Logix5550 Controller to be useful This owner controller stores configuration data for every module that it owns and can be local or remote in regard to the I O module s position The owner sends the I O module configuration data to define the module s behavior and begin operation within the control system Each ControlLogix I O module must continuously maintain communication with its owner to operate normally Typically each module in the system will have only 1 owner Input modules can have more than 1 owner Output modules however are limited to a single owner The I O configuration portion of RSLogix5000 generates the configuration data for each I O module in the control system whether the module is located in a local or remote chassis A remote chassis also known as networked contains the I O module but not the module s owner controller Configuration
112. s section It does not cover however the higher purity reference grade materials that traditionally were used to construct thermocouples used as transfer standards and reference thermometers in various laboratory applications and to develop reference functions and tables 22 23 The higher purity alloy material typically contains less than 500 atomic ppm of impurities and the platinum less than 100 atomic ppm of impurities 22 Differences between such high purity commercial material and the platinum thermoelectric reference standard Pt 67 are described in 22 and 23 A reference function for the type R thermocouple based on the ITS 90 and the SI volt was determined recently from new data obtained in a collaborative effort by NIST and NPL The results of this international collaboration were reported by Burns et al 23 The function was used to compute the reference table given in this monograph Type R thermocouples have about a 12 larger Seebeck coefficient than do Type S thermocouples over much of the range Type R thermocouples were not standard interpolating instruments on the IPTS 68 for the 630 74 C to gold freezing point range Other than these two points and remarks regarding history and composition all of the precautions and restrictions on usage given in the section on type S thermocouples also apply to type R thermocouples Glawe and Szaniszlo 24 and Walker et al 25 26 have determined the effects that prolonged exposu
113. se of iron contamination effects in some British platinum 10 rhodium wires The effects of various impurities on the thermoelectric voltages of platinum based thermocouple materials have been described by Rhys and Taimsalu 35 by Cochrane 36 and by Aliotta 37 Impurity contamination usually causes negative changes 25 26 29 in the thermoelectric voltage of the thermocouple with time the extent of which will depend upon the type and amount of chemical contaminant Such changes were shown to be due mainly to the platinum thermoelement 25 26 29 Volatilization of the rhodium from the positive thermoelement for the vapor transport of rhodium from the positive thermoelement to the pure platinum negative thermoelement also will cause negative drifts in the thermoelectric voltage Bentley 29 demonstrated that the vapor transport of rhodium can be virtually eliminated at 1700 C by using a single length of twin bore tubing to insulate the thermoelements and that contamination of the thermocouple by impurities transferred from the alumina insulator can be reduced by heat treating the insulator prior to its use McLaren and Murdock 30 33 and Bentley and Jones 34 thoroughly studied the performance of type S thermocouples in the range 0 C to 1100 C They described how thermally reversible effects such as quenched in point defects mechanical stresses and preferential oxidation of rhodium in the type SP thermoelement cause chemical and physical
114. sign install program or maintain a control system that uses Allen Bradley ControlLogix Controllers You should have a basic understanding of ControlLogix products You should also understand electronic process control and the ladder program instructions required to generate the electronic signals that control your application If you do not contact your local Allen Bradley representative for the proper training before using these products This guide covers the 1756sc IF8u universal analog input module It contains the information you need to install wire use and maintain these modules It also provides diagnostic and troubleshooting help should the need arise Table A lists several Allen Bradley documents that may help you as you use these products Table A Related Allen Bradley documents Allen Bradley Doc No Title Publication Number 1756 PA72 ControlLogix Power Supply Installation PB72 Instructions 1756 5 1 1756 A4 ControlLogix Chassis Installation Instructions 1756 5 2 A7 A10 A13 A17 vi ControlLogix Universal Analog Input Modules Terms amp Abbreviations You Should Know 1756 Series ControlLogix Module Installation Instructions Each module has separate document for installation 1756 5 5 5 42 1756 L1 Logix5550 Controller User Manual 1756 6 5 12 LIM1 L1M2 1756 DHRIO ControlLogix Data Highway Plus Communication Interface Module User Manual 1756 6 5 2 1756 ENET ControlLogix Etherne
115. t Communication Interface Module User Manual 1756 6 5 1 To obtain a copy of any of the Allen Bradley documents listed contact your local Allen Bradley office or distributor You should understand the following terms and abbreviations before using this guide A D Refers to analog to digital conversion The conversion produces a digital value whose magnitude is proportional to the instantaneous magnitude of an analog input signal Attenuation The reduction in magnitude of a signal as it passes through a system The opposite of gain Channel Refers to one of eight small signal analog input interfaces to the module s terminal block Each channel is configured for connection to a input device and has its own configuration and status words Chassis See rack CJC Cold Junction Compensation The means by which the module compensates for the offset voltage error introduced by the temperature at the junction between the thermocouple lead wire and the input terminal block the cold junction Common mode rejection ratio CMRR The ratio of a device s differential voltage gain to common mode voltage gain Expressed in dB CMRR is a comparative measure of a device s ability to reject interference caused by a voltage common to its terminal relative to ground Common mode voltage The voltage difference between the negative terminal and analog common during normal differential operation Preface vii Cut off fre
116. the controller and the device that occupies the slot that the configuration data references When module configuration data is downloaded to an owner controller the controller attempts to establish a direct connection to each of the modules referenced by the data If a controller has configuration data referencing a slot in the control system the controller periodically checks for the presence of a device there When a device s presence is detected the controller automatically sends the configuration data If the data is appropriate to the module found in the slot a connection is made and operation begins If the configuration data is not appropriate the data is rejected and an error message displays in the software In this case the configuration data can be inappropriate for any of a number of reasons The controller maintains and monitors its connection with a module Any break in the connection such as removal of the module from the chassis while under power causes the controller to set fault status bits in the data area associated with the module The RSLogix 5000 software may monitor this data area to announce the modules failures In traditional I O systems controllers poll input modules to obtain their input status Analog input modules in the ControlLogix system are not polled by a controller once a connection is established The modules multicast their data periodically Multicast frequency depends on the options chosen dur
117. the controller does not own the module i e it does not have to hold the module s configuration data to listen to the module The listen only mode is set during the I O configuration process Choosing a Listen Only mode option allows the controller and module to establish communications without the controller sending any configuration data In this instance another controller owns the module being listened to Important Controllers using the Listen Only mode continue to receive data multicast from the I O module as long as a connection between an owner and I O module is maintained If the connection between all owners and the module is broken the module stops multicasting data and connections to all Listening controllers are also broken Because Listening controllers lose their connections to modules when communications with the owner stop the ControlLogix system will allow you to define more than one owner for input modules Important Only input modules can have multiple owners If multiple owners are connected to the same input module they must maintain identical configuration for that module In the example below Controller A and Controller B have both been configured to be the owner ofthe input module Configuration Changes in an Input Module with Multiple Owners Chapter 3 Operation within the System 27 When the controllers begin downloading configuration data both try to establish a connecti
118. this reserved spot may or may not coincide with the exact value of the RPI but the control system will guarantee that the owner controller will receive data at least as often as the specified RPI 26 ControlLogix Universal Analog Input Module Listen Only Mode Multiple Owners of Input Modules The reserved spot on the network and the module s RTS are asynchronous to each other This means there are Best and Worst Case scenarios as to when the owner controller will receive updated channel data from the module in a networked chassis Best Case RTS Scenario In the Best Case scenario the module performs an RTS multicast with updated channel data just before the reserved network slot is made available In this case the remotely located owner receives the data almost immediately Worst Case RTS Scenario In the Worst Case scenario the module performs an RTS multicast just after the reserved network slot has passed In this case the owner controller will not receive data until the next scheduled network slot Because it is the RPI and NOT the RTS which dictates when the module s data will be sent over the network we recommend the RPI value be set LESS THAN OR EQUAL TO the RTS to make sure that updated channel data is received by the owner controller with each receipt of data Any controller in the system can listen to the data from any I O module e g input data or echoed output data even if
119. to 752 F Thermocouple Type E 270 C to 1000 C 454 F to 1832 F Type of Input Selectable Thermocouple TypeR 0 C to 1768 C 32 F to 3214 F Thermocouple Type S 0 C to 1768 C 32 F to 3214 F Appendix A Module Specifications 71 Thermocouple TypeB 300 C to 1820 C 572 F to 3308 F Thermocouple Type N 210 C to 1300 C 346 F to 2372 F Thermocouple TypeC 0 C to 2315 C 32 F to 4199 F CIC Sensor 0 C to 90 C 32 F to 194 F Millivolt 50 mVdc to 50 mVde 150 mVdc to 150 mVdc Volt 0 5V 1 5V 0 10V 10V Current 4 to 20mA 0 to20mA RTD Pt 385 200 C to 850 C 328 F to 1562 F 1000 2000 5002 10002 RTD Pt 3916 200 C to 630 C 328 F to 1166 F 1000 2000 5000 10002 RID 10Q Cu426 100 C to 260 C 148 F to 500 F RIDNi618 100 C to 260 C 148 F to 500 F 1209 2009 5000 10009 RTD 1200Ni 672 80 C to 260 C 112 F to 500 F RTD 120Q Ni Fe 518 100 C to 200 C 148 F to 376 F Resistance 0 to 250 500 1000 2000 3000 4000Q 72 ControlLogix Universal Analog Input Module RTD Conversion JISC 1602 1997 for Pt 385 JIS C 1604 1989 for Pt 3916 SAMARC21 4 1966 for the 10QCu426RTD DIN 43760 Sept 1987 forthe 120Q Ni618RTD MINCO Application Aid 18 May 1990 for the 1200 Ni 672 RTD Thermocouple NISTITS 90 standard Linearization RTD Current Source 252uA or 1 008mA one foreach RTD channel Cold Junction Compensation 2 Onboard CJC Sensor Required Input Impedence Great
120. tomation Publication 0300191 04 Rev A May 2011 Printed in U S A Corporate Headquarters Spectrum Controls Inc P O Box 6489 Bellevue WA 98008 USA Fax 425 641 9473 Tel 425 746 9481 Web Site www spectrumcontrols com E mail spectrum spectrumcontrols com Sai SPECTRUM c Oo N T R Oo L S
121. tput 8 Point 74V 265V AC Output 8 Point 74V 132V AC Diagnostic Output 8 Point 74V 132V AC Electronically Fused Output 16 Point 13 2 30 DC Diagnostic Output 16 Point 10 31 2v DC Electronically Fused Output 16 Point 10 30 DC Isolated Output Sink Source 32 Point 10w 31 2 DC Output 3 After clicking OK you are presented with the following dialog for setting up the general information about the module Use the same values specified here Appendix D Installing the module using a Generic Module profile 103 Owner Controller Connection Controller provides configuration Module Properties Local 1 1756 MODULE 1 1 General Connection Module Info Backplane Type 1756 MODULE Generic 1756 Module Parent Local Connection Parameters Name IFBu Description Dutput Configuration Comm Format Slot 1 Status Offline Cancel Listen only controller connection Controller does not provide configruration but monitors input data only Another owner controller must exist fal Module Properties Local 2 1756 MODULE 1 1 General Connection Module Info Backplane Type 1756 MODULE Generic 1756 Module Parent Local r Connection Parameters Name Fa Description Dutput Configuration Comm Format input Data DINT z Status Input Slot 53 Status Status Offline Cancel Apply Help 104 ControlLogix Universal Analog Input M
122. units e g 0 15 C or as a number of bits For example a 12 bit system has 4096 possible output states It can therefore measure part in 4096 See also effective resolution RTD Resistance Temperature Detector A temperature sensing element with 2 3 4 lead wires It uses the basic characteristics that electrical resistance of metals increases with temperature When a small current is applied to the RTD it creates a voltage that varies with temperature This voltage is processed and converted by the RTD module into a temperature value Sampling time The time required by the A D converter to sample an input channel IM viii ControlLogix Universal Analog Input Modules Step response time The time required for the A D signal to reach 95 of its expected final value given a full scale step change in the output data word Tags Identifiers for configuration data and status information found withing the module Tags allow the user to modify specific module attributes and view data and status Update time The time for the module to sample and convert a channel input signal and make the resulting value available to the ControlLogix processor Table of Contents Preface V Module Overview 1 Installing And Wiring Your Module 9 Operation Within the ControlLogix System 23 Programming Your Module 29 Who Should Use This Guide yes en or arma ee a aes v What This Guid Covers 4 sie erret besse
123. ver was found 8 to be not quite as good as that of type EN thermoelements Type K thermocouples are recommended by the ASTM 5 for use at temperatures within the range 250 C to 1260 C in oxidizing or inert atmospheres Both the KP and the KN thermoelements are subject to deterioration by oxidation when used in air above about 750 C but even so type K thermocouples may be used at temperatures up to about 1350 C for short periods with only small changes in calibration When oxidation occurs it normally leads to a gradual increase in the thermoelectric voltage with time The magnitude of the change in the thermoelectric voltage and the physical life of the thermocouple will depend upon such factors as the temperature the time at temperature the diameter of the thermoelements and the conditions of use The ASTM Manual 5 indicates that type K thermocouples should not be used at high temperatures in sulfurous reducing or alternately oxidizing and reducing atmospheres unless suitably protected with protecting tubes They also should not be used in vacuum at high temperatures for extended times because the chromium in the positive thermoelement a nickel chromium alloy vaporizes out of solution and alters the calibration In addition their use in atmospheres that promote green rot corrosion 9 of the positive thermoelement should be avoided Such corrosion results from the preferential oxidation of chromium in atmospheres with low
124. wnloaded from our website at http www spectrumcontrols com downloads htm The AOP allows you to add the IF8U to the RSLogix 5000 pick list and contains custom configuration screens for the module If you do plan to use the AOP you can skip the remainder of this chapter For those that plan to use RSLogix 5000 version 14 or older the generic module profile must be used to add the IF8U to a new or existing project An RSLogix 5000 sample project utilizing the generic module profile is available for download on our website at www spectrumcontrols com downloads htm The ladder sample contains user defined input and configuration tags used to configure and read analog data from the IFSU module The configuration tags control features such as the modules input type channel input range data format filter frequency etc The module has a unique set of tag definitions which are used to configure specific features Chapter 5 Channel Configuration Data and Status gives you detailed information about the data content of the configuration These values are set using your programming software and ladder logic Before you can use these feature you must first include the module into the project 30 ControlLogix Universal Analog Input Module Open the sample project with the IF8u information Open your project Drag and drop the IF8u module into the I O configuration section of your project Logix 5000 IF8u_Sample 1756 11

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