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Allen Bradley 1746 NI8 Manual

1. 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Bit Number 0 0 0 Channel 0 0 0 0 Channel 1 0 0 0 Channel 2 0 0 0 Channel 3 0 0 0 Channel 4 0 0 0 Channel 5 0 0 0 Channel 6 0 0 0 Channel 7 A A A A d Input Type Data Format Open Circuit Filter Frequency Channel Enable Not Used Bit Definitions Bits 0 2 Input Type 000 10V dc 010 0 5V dc 100 0 20 mA 110 20 mA 001 1 5V de 011 0 10V dc 101 4 20 mA 111 0 1 mA FM 000 engineering units 010 proportional counts 100 user defined scaling 110 illegal BD Dele FOB 001 scaled for PID 011 1746 NI4 data format 101 user defined scaling 111 illegal Bits 6 and 7 Open Circuit 00 zero 01 upscale 10 downscale 11 illegal 000 no filter 010 50 Hz 100 10 Hz 110 2 Hz PREGAN HF FY i zee 011 20 Hz 101 5 Hz 111 1 Hz Bit 11 Channel Enable 0 channel disabled 1 channel enabled Bits 12 15 Not Used 0000 always make this setting Publication 1746 6 8 April 1997 Module ID Code Appendix C Converting from 1746 NI4 to 1746 NI8 This information is provided for those who are replacing two 1746 NI4 modules with one 1746 NI8 module The module identification code is a unique number encoded for each 1746 I O module The code defines for the processor the type of I O or specialty module residing in a s
2. Publication 1746 6 8 April 1997 Program Listing Application Examples 8 3 Rung 2 0 Initialize the 1746 NI8 First Pass Bit Module Channel 0 S 1 MOV E MOVE 15 Source N10 0 Dest 0 3 0 SCP Rung 2 1 Scale w Parameters _ Input I 3 0 0 Input Min 3500 3500 Input Max 20500 20500 Scaled Min 0 0 Scaled Max 100 100 lt Output N7 0 0 Rung 2 2 mb TO BCD Source N7 0 Convert the scaled channel 0 data word 0 to BCD and write this to the LED display Dest N7 1 If channel 0 is ever disabled a zero is 0000h lt written to the display MVM MASKED MOVE Source N7 1 0 Mask OFFFh 4095 Dest 0 2 0 0 Rung 2 3 END The use of the masked move instruction with the OFFF mask allows you to use outputs 12 13 14 and 15 for other output devices in your system The 7 segment display uses outputs 0 11 Data File DATA FILE N10 Offset 15 14 13 12 1110 9 8 7 N10 0 0 0 O O 1 1 O O O O O O 1 1 0 1 Publication 1746 6 8 April 1997 8 4 Application Examples Supplementary Example Application Setup Display Amps PSI and Liquid Level This example shows how to display current pressure and liquid level at one annunciator panel The motor current draw is displayed in amps The tank pressure is displayed in psi The liquid level in the holding tank is displayed in inches A three position selector swi
3. Channel 0 Enabled Sample Sample Channel 1 Channel 2 Channel 3 Enabled Enabled ia Sample Sample Channel 4 Disabled Channel 5 Disabled Channel 6 Disabled Channel 7 Disabled Enabled Sample Channel 4 Enabled Sample Enabled Sample Enabled Sample Channel 5 Channel 6 Channel 7 The following table shows the module update time The module update time is the same regardless of the filter frequency The fastest module update time occurs when only one channel is enabled The slowest module update time occurs when 8 channels are enabled Module Update Time Number of Channels Enabled Update Time 1 0 75 msec 1 50 msec 2 25 msec 3 00 msec 3 75 msec 4 50 msec 5 25 msec INIo A Pp 6 00 msec Publication 1746 6 8 April 1997 4 6 Preliminary Operating Considerations Channel Turn On Turn Off and Reconfiguration Times Response to Slot Disabling Publication 1746 6 8 April 1997 The table below gives you the turn on turn off and reconfiguration times for enabling or disabling a channel Description Duration The time it takes to set the status bit transition Turn On Time from 0 to 1 in the status word after setting the enable bit in the configuration word The time it takes to reset the status bit tran
4. 214421342124 511425 51420 215 16384 8192 4096 2048 32 2 1 32768 30755 32768 2013 1x2 4 16384 1x2137g192 1x2127 4096 1x21 7 2048 1x2107 1024 13227 512 1287256 1x27 128 1x26 64 105732 1x2 7 16 10578 19274 1x21571 This position is always 1 for negative numbers 16384 8192 4096 2048 1024 512 256 128 64 32 oo ON 32767 Glossary The following terms and abbreviations are used throughout this manual For definitions of terms not listed here refer to Allen Bradley s Industrial Automation Glossary Publication AG 7 1 A D Refers to the analog to digital converter inherent to the module The converter produces a digital value whose magnitude is proportional to the instantaneous magnitude of an analog input signal analog input module An I O module that contains circuits that convert analog dc input signals to digital values that can be manipulated by the processor attenuation The reduction in the magnitude of a signal as it passes through a system backplane A printed circuit board at the back of the chassis that provides electrical interconnection between the modules inserted into the chassis channel Refers to one of eight small signal analog input interfaces available on the module s terminal block Each channel is configured for connection to a voltage or current source input device and has its own data and diagnostic status words channel updat
5. channel data value x scaling factor x reza input range where SLow 0 C SHIGH 10 C channel data word 5000 scaling for engineering units 1 mV per step i NAC PORE E Solution Real Units Equivalent 5000 x I mV x T0V de OV c 5 000 C p TIP Ifyou are measuring a real voltage or current then selecting engineering units allows the module to report real values without further scaling For example a 4 683V dc signal would produce a channel data word of 4683 Publication 1746 6 8 April 1997 Channel Configuration Data and Status 5 9 Scaled for PID to Real Units Situation Find Eguation where Solution A transducer is being used to measure temperature The 4 20 mA signal is proportional to 100 500 C 212 9329F The channel data word is in scaled for PID format The channel data 5500 Real units equivalent in F channel data value Real Units Equivalent Stow Sow X m scale default PID a Stow 212 F SHIGH 932 F channel data word 5500 full scale PID default value from table on page 5 6 16383 Real Units Equivalent 212 F 032r 212 F x 3 8 453 71 F Proportional Counts to Real Units Situation Find Equation Real Units Equivalent S ow c HIGH Stow X where Solution A transducer is being used to measure pressure The 10V dc to 10V dc signal is proportional to O to 200 ps
6. module update time 55 msec module update time 60 msec module update time 50 Hz 14 5 msec module update time 22 msec module update time 24 msec module update time 75 Hz 10 msec module update time 15 msec module update time 18 msec module update time no filter 0 5 msec module update time 0 75 msec module update time 0 75 msec module update time The module accuracy for current inputs is 0 05 and for voltage inputs is 0 1 Channel Step Response The channel filter frequency determines the channel s step response The step response is time required for the channel data word to reach a specified percentage of its expected final value This means that if an input signal changes faster than the channel step response a portion of that signal will be attenuated by the channel filter The table above shows the step response for each filter frequency Channel Frequency Channel Cut Off Frequency The channel filter frequency selection determines a channel s cut off frequency also called the 3 dB frequency The cut off frequency is defined as the point on the input channel frequency response curve where frequency components of the input signal are passed with 3 dB of attenuation All frequency components at or below the cut off frequency are passed by the digital filter with less than 3 dB of attenuation All frequency components above the cut off frequency ar
7. Chapter 8 Application Examples This chapter provides two application examples to help you use the analog input module They are defined as a basic example e supplementary example The basic example builds on the configuration word programming provided in chapter 6 to set up one channel for operation This setup is then used in a typical application to display a current amperage value The supplementary example demonstrates how to perform a dynamic configuration of five of the eight available channels The example sets up an application that allows you to manually select whether the current transducer data is displayed for L1 L2 or L3 The example also includes configuration and programming to display pressure and liquid level Application Setup Display a Current amperage Value In this example the current draw of a single phase motor is shown on an LED display The display requires BCD data so the program must convert the current reading from the analog input module to BCD before sending it to the display Device Configuration 1746 0B16 1746 NI8 L1 L2 SLC 5 04 processor LA Pe ooo Current Transducer LED Display N DC sinking inputs BCD format Single Phase Motor Publication 1746 6 8 April 1997 8 2 Application Examples Channel Configuration Configure channel 0 of the 1746
8. Numberof Resolution Representation Significant Bits per LSB 0 to 20 mA 0 to 16 384 14 bits 4 to 20 mA 3 277 to 16 304 13 67 bits 1 22070 uA 20 mA to 20 mA 16 384 to 416 384 15 bits 0to 1 mA 0 to 1000 10 bits 1 uA This data format is not supported by the 1746 NI4 module but is available for the 1746 NI8 module User defined scaling count Class 3 operation only allows the output image data words 8 and 9 or words 10 and 11 to be selected to represent low scale and high scale limits The module uses these limits and scales proportionately between them For example if words 8 and 9 are selected to represent low and high scaling ranges data format select bits 100 binary and word 8 contains 0000 hex 0 decimal and word 9 contains 4E20 hex 20000 decimal this would represent the range of values that the voltage or current readings would be scaled into The lowest voltage or current reading would be scaled to 0 and the highest voltage or current reading would be scaled to 20000 with other readings scaled proportionately between them If the module is in Class 1 mode and you attempt to configure for user defined proportional counting a configuration error will be generated Using Scaled for PID and Proportional Counts The scaled for PID and proportional count selections provide the highest display resolution but also require you to manually convert the channel data to real units Publication 1746 6
9. and Status 5 5 While the channel enable bit is cleared 0 the channel data word and status word values are cleared After the channel enable bit is set the channel data word and status word remain cleared until the module sets the channel status bit bit 11 in the channel status word Refer to Channel Status on page 5 11 Unused Bits Bits 12 15 Bits 12 15 are not defined Ensure these bits are always set to zero Channel Data Word The module input image uses 8 data word values whether the module is in Class 1 or Class 3 mode The converted voltage or current input data values reside in I e 0 through I e 7 of the module s input image file When an input channel is disabled its data word is reset to Zero 1746 NI8 Module Input Image Data Word Class 1 Class 3 l e 0 channel 0 data word 16 bit integer lie channel 1 data word 16 bit integer lie 2 channel 2 data word 16 bit integer l e 3 channel 3 data word 16 bit integer l e 4 channel 4 data word 16 bit integer lie 5 channel 5 data word 16 bit integer l e 6 channel 6 data word 16 bit integer lie 7 channel 7 data word 16 bit integer The channel data word contains a 16 bit integer that represents the value of the analog input channel The tables below show the channel data word values for various input types and data formats The second table shows the default full scale values for the
10. eo single end 2 Channel 1 signal source a shield e a TM o Channel 2 signal source S shield e c mm o eben signal source shield e mH i differential B signal source en Channel 4 shield e differential signal source m Channels ET Sy shield e 3 m differential g signal source A Channel 6 shield im S i D differential E OE a signal source o anne shield n Shield l Publication 1746 6 8 April 1997 When wiring single ended analog input devices to the analog input module the number of total wires necessary can be limited by jumpering all IN terminals together Note that differential inputs are more immune to noise than single ended inputs Important The module does not provide loop power for analog inputs Use a power supply that matches the transmitter specifications Important Follow the guidelines on pages 3 7 and 3 9 when wiring the module Important The module does not provide loop power for analog inputs Use a power supply that matches the transmitter specifications Important Follow the guidelines on pages 3 7 and 3 9 when wiring the module Publication 1746 6 8 April 1997 Installation and Wiring Wiring Schematic for Single ended Analog Input Connections Transmitter Supply O Signal Transmitter ignal a We Transmitte
11. proportional counts data format The table does not imply the entire data value range is usable resolution Channel Data Word Values for Engineering Units Input Type Signal Range Engineering Units Engineering Units Scale 10V dc 10 25V to 10 25V 10250 to 10250 1mV step 0 5V de 0 5V to 5 5V 500 to 5500 1mV step 1 5V dc 0 5V to 5 5V 500 to 5500 1mV step 0 10V dc 0 5V to 410 25V 500 to 410250 1mV step 0 20 mA 0 5 mA to 20 5 mA 500 to 20500 1 0uA step 4 20 mA 3 5 mA to 20 5 mA 3500 to 20500 1 0uA step 20 mA 20 5 mA to 20 5 mA 20500 to 20500 1 0uA step 0 1 mA 0 05 mA to 1 05 mA 50 to 1050 1 0uA step Publication 1746 6 8 April 1997 5 6 Channel Configuration Data and Status Channel Data Word Values for Scaled Data Input Type Signal Range Scaled for PID Proportional Counts default NI4 Data Format 10V dc 10 00V to 10 00V 0 to 16383 32768 to 32767 32768 to 32767 0 5V dc 0 0V to 5 00V 0 to 16383 32768 to 32767 0 to 16384 1 5V de 1 00V to 5 00V 0 to 16383 32768 to 32767 3277 to 16384 0 10V de 0 0V to 10 00V 0 to 16383 32768 to 32767 0 to 32767 0 20 mA 0 0 mA to 20 0 mA 0 to 16383 32768 to 32767 0 to 16384 4 20 mA 4 0 mA to 20 0 mA 0 to 16383 32768 to 32767 3277 to 16384 20 mA 20 0 mA to 20 0 mA 0 to 16383 32768 to 32767 16384 to 16384 0 1 mA 0 0 mA to 1 00 mA 0 to 16383 32768 to 32767 0 to 1000 This data format is not supported by the 1746 NI4 module but is
12. table shows the first alias frequency based on the number of channels enabled Aliasing Frequency for Number of Channels Enabled 1 Channel 1333 Hz 2 3 4 5 6 7 8 Channels Channels Channels Channels Channels Channels Channels 666 Hz 444 Hz 333 Hz 267 Hz 222 Hz 190 Hz 167 Hz Transfer Function Response dB Transfer Function Response dB Preliminary Operating Considerations 4 9 The graph below shows the aliasing characteristic at a filter frequency of 10 Hz with one channel enabled 10 Hz Filter Frequency with One Channel Enabled 0 l il LLY MM 40 U 60 100 10 10 10 104 Input Frequency Hz 1333 Hz The graph below shows the aliasing characteristic at a filter frequency of 10 Hz with eight channels enabled 10 Hz Filter Frequency with Eight Channels Enabled O UE 40 60 10 10 102 108 104 167 Hz Input Frequency Hz Publication 1746 6 8 April 1997 4 10 Preliminary Operating Considerations Publication 1746 6 8 April 1997 Noise Rejection Rejection of common mode noise is inherent in the hardware design of the module Common Mode Rejection is better than 75 dB for common mode DC signals and better than 100 dB for common mode 50 Hz and 60 Hz AC s
13. 12726 Class 3 interface Important All programming software does not support configuration for Class 3 operation e Advanced Programming Software APS supports Class 3 configuration After entering the ID code 12726 enter 16 input words and 12 output words e SLC 500 A I Series Programming Software supports Class 3 configuration After entering the ID code 12726 enter 16 input words and 12 output words e RSLogix 500 version 1 30 or later supports Class 3 configuration After entering the ID code 12726 select Class 3 operation e Earlier versions of RSLogix 500 will only support configuration for Class 1 operation Contact Rockwell Software for information on upgrading your software Publication 1746 6 8 April 1997 4 2 Preliminary Operating Considerations Class 1 and Class 3 The 1746 NI8 analog input module has multiclass interface Interface capabilities Class is the standard configuration The module can be configured through the user program for Class 3 which enables user defined data scaling and monitoring of channel status words Configuration Class 1 Class 3 Compatible SLC SLC 500 fixed SLC 5 01 SLC 5 02 Processors SLC 5 03 and SLC 5 04 SEC POE ene ae and BI Compatible local chassis or remote chassis with a Mn Chassis 1747 ASB module output ligna output image p g y 8 channel configuration words and 4 limit ranges Input and 8 channel configuration words i i
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15. Word 1 Word 2 Word 3 Word 4 Word 5 Word 6 Word 7 Word 8 Word 9 Word 10 Word 11 Word 12 Word 13 Word 14 Word 15 4 3 Address O e 0 O e 1 O e 2 O e 3 O e 4 O e 5 O e 6 O e 7 O e 8 O e 9 O e 10 O e 11 Address l e 0 l e 1 l e 2 l e 3 l e 4 l e 5 l e 6 l e 7 l e 8 l e 9 l e 10 l e 11 e 12 l e 13 l e 14 l e 15 The module output image defined as the output from the processor to the module contains information that you configure to define the way a specific module channel will work Each output word configures a single channel Publication 1746 6 8 April 1997 4 4 Publication 1746 6 8 April 1997 Preliminary Operating Considerations Example If you want to configure channel 2 on the analog module located in slot 4 in the chassis your address would be O 4 2 File Type gt 4 2 4 Word p Element Word Delimiter Slot Delimiter Chapter 5 Channel Configuration Data and Status gives you detailed bit information about the data content of the configuration word Input Image Data Words and Status Words The input image defined as the input from the module to the processor represents data words and status words Important Status words are only available when the module is configured for Class 3 Input words 0 7 data words hold the input data that represent the value of analog inputs for channels 0 7 This data wor
16. available for the 1746 NI8 module Scaling the This section provides descriptions of how the data types are Channel Data Word expressed in the channel data word and examples of how to Publication 1746 6 8 April 1997 mathematically convert the data Data Type Descriptions The engineering units are 1 mV step for voltage input types and 1 0 n A step for current input types The scaled for PID value is a 14 bit unsigned integer with 0 representing the low scale value and 16 383 representing the full scale value minus 1 Isb The input signal range is proportional to your selected input type and scaled into a 0 16 383 range which is standard to the SLC PID algorithm The proportional count value is a 16 bit signed integer The input signal range is proportional to your selected input and scaled into a 32 768 to 32 767 range The 1746 NIA data format converts the current and voltage signals into 16 bit 2 s complement binary values The table below identifies the current and voltage input ranges for the input channels the number of significant bits and the resolution Voltage Current Range Decimal Number of Resolution Representation Significant Bits per LSB 10V dc to 10V dc 1LSB 32 768 to 432 767 16 bits 0 to 5V dc 0 to 16 384 14 bits 1 to 5V dc 3 277 to 16 384 13 67 bits UL 0 to 10V dc 1LSB 0 to 32 767 15 bits Channel Configuration Data and Status 5 7 Voltage Current Range Decimal
17. drives away from modules which generate significant radiated heat such as the 32 point I O modules In addition route shielded twisted pair analog input wiring away from any high voltage I O wiring This product is approved for installation within the European Union and EEA regions It has been designed and tested to meet the following directives EMC Directive The 1746 NI8 analog input module 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 e EN 500812 EMC Generic Emission Standard Part 2 Industrial Environment e EN 500822 EMC Generic Immunity Standard Part 2 Industrial Environment This product is intended for use in an industrial environment Publication 1746 6 8 April 1997 3 4 Installation and Wiring Module Installation and Removal Publication 1746 6 8 April 1997 When installing the module in a chassis it is not necessary to remove the terminal block from the module However if the terminal block is removed use the write on label located on the side of the terminal block to identify the module location and type Terminal Block Removal SLOT __ RACK_ e MODULE ATTENTION Never install remove or wire modules with power applied to the chassis or devices wired to the module To remove the terminal block 1 Loosen the two terminal block release screw
18. for user defined scaling data format Output Images input image j 8 channel data words PESO 8 channel data words and 8 channel status words Default Class 1 is the default on power up Class 3 is programmable by user Module Addressing The following memory maps show you how the input and output SLC 5 0X Data Files Input Image Publication 1746 6 8 April 1997 input image tables are defined for Class 1 and Class 3 Class 1 Memory Map Bit 15 Analog Input Module Image Table Output Image Output Image 8 Words Input Image 8 Words Input Image Class 1 f U Bit 15 Bit 0 Address TE Ww Ol Address Bit 0 Preliminary Operating Considerations Class 3 Memory Map Bit 15 Bit 0 Channel 0 Configuration Word Channel 1 Configuration Word Channel 2 Configuration Word Channel 3 Configuration Word Channel 4 Configuration Word Channel 5 Configuration Word Channel 6 Configuration Word Analog Input SLC 5 0X Module Data Files Image Table Channel 7 Configuration Word lower scale limit range 0 Output Image upper scale limit range 0 lower scale limit range 1 Output Image aa 12 Words upper scale limit range 1 Input Image yere Channel 7 Data Word Class 3 Bit 15 Bit 0 Output Image Configuration Words Word 0 Word 1 Word 2 Word 3 Word 4 Word 5 Word 6 Word 7 Word 8 Word 9 Word 10 Word 11 Word 0
19. go on and the module continuously converts the analog input to a value within the range you selected Each time a channel is read by the module that data value is tested by the module for a fault condition i e open circuit over range and under range If such a condition is detected a unique bit is set in the channel status word and the channel status LED blinks Publication 1746 6 8 April 1997 1 4 Overview Publication 1746 6 8 April 1997 The SLC processor reads the converted analog data from the module at the end of the program scan or when commanded by the ladder program The processor and module determine that the backplane data transfer was made without error and the data is used in your ladder program A graphic representation of this is shown below Data Transfer Between the Module and Processor shown for one channel Voltage or Current Channel Data Word Analog Channel Input g p 1746 NIB Channel Status Word Analog SLC 500 Input Processor Module Channel Configuration Word from Ladder Program Module Operation The 1746 NI8 module s input circuitry consists of eight differential analog inputs multiplexed into a single analog to digital A D converter The A D converter reads the selected input signal and converts it to a digital value The multiplexer sequentially switches each input channel to the module s A D converter Multiplexing provides an economical means for a si
20. is in a run state Examines the channel configuration word and the 5 Channel Configuration channel status word bit by bit and explains how the Data and Status module uses configuration data and generates status during operation Gives an example of the ladder logic required to Ladder Programming define the channel for operation Also includes 6 Examples representative examples for unigue programming reguirements such as PID 7 Module Diagnostics and Explains how to interpret and correct problems that Troubleshooting may occur while using the module Examines both basic and supplementary 8 Application Examples applications and gives examples of the ladder logic necessary to achieve the desired result M Provides physical electrical environmental and Appendix A ification Em Yo i PP shecieations functional specifications for the module Appendix B Configuration Worksheet Provides a worksheet to help you configure the module for operation Converting from Describes how to reconfigure a system using Appendix C 1746 NI4 to 1746 NI8 1746 NI4 modules to one with that uses 1746 NI8 modules Appendix D Two s Complement Binary Describes the two s compliment binary number pp Numbers system Glossary Lists key terms and abbreviations Preface Related Documentation The following documents contain information that may be helpful to you as you use Allen Bradley SLC products To obtain a copy of any of the Allen Bradley docume
21. must also use the DIP switches to select voltage or current Ensure unused bits 12 15 are always be set to zeros Publication 1746 6 8 April 1997 Channel Configuration Data and Status 5 3 Select Input Type Bits 0 2 The input type bit field lets you configure the channel for the type of input device you have connected to the module Valid input is an analog voltage or current that provides a signal within one of the specified ranges Determine the input device type for a channel and enter its respective 3 digit binary code in bit field 0 2 of the channel configuration word You must also set the DIP switches of the module for voltage or current Select Data Format Bits 3 5 Select a data format for the data word value Your selection determines how the analog input value from the A D converter will be expressed in the data word Enter your 3 digit binary code in bit field 3 5 of the channel configuration word The data types are engineering units scaled for PID proportional counts 1746 NI4 data format and user defined scaling for Class 3 operation only For all data types the channel data word is proportional to the analog input signal To have the data in real units the channel data word must be scaled mathematically See Channel Data Word on page 5 5 for the default scaling values and Scaling the Data Channel Word on page 5 6 for data type descriptions and scaling examples Select Open Circuit State B
22. processor multiplexer An switching system that allows several input signals to share a common A D converter Glossary G 3 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 output image The output from the SLC processor to the 1746 NI8 module The output image contains the module configuration information Each output word configures a single channel remote configuration A control system where the chassis can be located several thousand feet from the processor chassis Chassis communication is via the 1747 SN Scanner and 1747 ASB Remote PO Adapter resolution The smallest detectable change in a measurement typically expressed in engineering units e g 1 mV or as a number of bits For example a 12 bit system has 4 096 possible output states It can therefore measure 1 part in 4096 scaling The process of changing a quantity from one notation to another status word Contains status information about the channel s current configuration and operational state You can use this information in your ladder program to determine whether the channel data word is valid step response time This is the time required for the channel data word signal to reach a specified percentage of its expected final value given a large step change in the input signal transducer A device that converts one energ
23. that affect the compatibility characteristics of NR4 o 0 050 0 050 the BASIC module BAS and the DH 485 RS 232C HSTP1 0 200 module KE IH16 0 085 a sn When you use the BAS module or the KE module to OB16 0 280 supply power to a 1747 AIC Link Coupler the Link IN16 5 0 085 F Coupler draws its power through the module The BASn 0 150 0 125 higher current drawn by the AIC at 24V dc is calculated BAS 0 150 0 040 and recorded in the table for the modules identified as T 1455 BASn BAS networked or KEn KE networked IV32 0 106 Make sure to refer to these modules if your application IB32 0 106 uses the BAS or KE module in this way OX8 0 085 0 090 NO4I v 0 055 0 195 NO4V v 0 055 0 145 KEn 0 150 0 125 KE 0 150 0 040 Publication 1746 6 8 April 1997 Compliance to European Union Directives Installation and Wiring 3 3 General Considerations Most applications require installation in an industrial enclosure to reduce the effects of electrical interference Analog inputs are highly susceptible to electrical noise Electrical noise coupled to the analog inputs will reduce the performance accuracy of the module Group your modules to minimize adverse effects from radiated electrical noise and heat Consider the following conditions when selecting a slot for the analog input module Position the module in a slot away from sources of electrical noise such as hard contact switches relays and AC motor
24. to 0 200 psi The channel data word is in user defined data format The lower scale limit configuration word 8 0 The upper scale limit configuration word 9 20000 The channel data word 16600 Real units equivalent in psi Real Units Equivalent channel data word X Sincn Stow upper scale limit lower scale limit Stow 0 psi SHIGH 200 psi j 200 psi 0 psi x 2 b Real Units Equivalent 16600 20000 0 166 00 psi Publication 1746 6 8 April 1997 Channel Status Checking Channel Configuration Data and Status 5 11 If the module is in Class 3 mode there are an additional 8 input image words available for status information The channel status word is a part of the module s input image Input words 8 15 correspond to and contain the configuration status of channels 0 7 You can use the data provided in the status word to determine if the input configuration data for any channel is valid per your configuration in O e 0 through O e 7 For example whenever a channel is disabled O e x 11 0 its corresponding status word shows all zeros This condition tells you that input data contained in the data word for that channel is not valid and should be ignored 1746 NI8 Module Input Image Status Word Class 1 Class 3 l e 9 channel 1 status word bit mapped field l e 10 channel 2 status word bit mapped field l e 11 channel 3 status word bit mappe
25. 00 msec Select Channel Filter Frequency Bits 8 10 Determine the desired input filter frequency for the channel and enter the 3 digit binary code in bit field 8 10 of the channel configuration word The channel filter frequency bit field lets you select one of 8 filters available for a channel The filter frequency affects the noise rejection characteristics A lower filter frequency increases the noise rejection and a higher filter frequency decreases the noise rejection Select a filter frequency considering acceptable noise and step response time See Channel Filter Frequency Selection on page 4 7 for more information on filter frequency Select Channel Enable Bit 11 Determine which channels are used in your program and enable them Place a one in bit 11 if the channel is to be enabled Place a zero in bit 11 if the channel is to be disabled The 1746 NI8 module only scans those channels that are enabled To optimize module operation and minimize throughput times unused channels should be disabled by setting the channel enable bit to zero When set 1 the channel enable bit is used by the module to read the configuration word information you have selected While the enable bit is set modification of the configuration word may lengthen the module update time for one cycle If any change is made to the configuration word the change must be reflected in the status word before new data is valid Channel Configuration Data
26. 1 EMC Directive 3 3 enabling a channel 5 4 engineering units input 5 6 environmental specifications A 2 equipment required for installation 2 1 errors 7 3 channel related errors configuration error 7 3 detecting channel related errors 7 3 open circuit 7 3 over range error 7 3 under range error 7 3 module related errors 7 4 conditions at power up 7 4 over range error 7 3 European Union Directives 3 3 configuration word 2 4 examples basic application example 8 1 how to address configuration word 4 4 how to address data word 4 4 how to address status word 4 4 how to use PID instruction 6 3 scaling the data word 5 8 supplementary application example using alarms to indicate status 6 4 F fault condition at power up 1 3 during operation 1 3 filter definition G 2 filter frequency 4 7 definition G 2 examining in status word 5 13 setting in configuration word 5 4 FSR See full scale range full scale error definition G 2 full scale range definition G 2 G gain drift definition G 2 gain error See full scale error getting started 2 1 procedure 2 2 tools required 2 1 H hazardous environment classification A 2 heat considerations 3 3 ID code 4 1 C 1 input channel multiplexing 1 4 input data scaling definition G 2 input device type 5 3 examining in status word 5 13 setting in configuration word 5 3 input devices source impedance wiring 3 9 inpu
27. 12 11 10 9 8 7 6 5 4 3 2 1 0 N10 0 o 0 00110000001 10 1 N10 1 o 0o 0 O 1 1 0 0 0O O 0 O 1 1 0 1 N10 2 o o 0 O 1 1 0 0 0O O O O 1 1 0 1 N10 3 o o 0 O 1 1 0 0 0O O O O 1 1 0 1 N10 4 0 0 0 O 1 1 0 0 0 0 O O 1 1 0 1 N10 5 o 0o 0 1 1 0 0 0O 0O O O 1 1 0 1 N10 6 o 0o 0 O 1 1 0 0 0O O O O 1 1 0 1 N10 7 o O 0 O 1 1 0 0 O O O O 1 1 0 1 Publication 1746 6 8 April 1997 Module Operation vs Channel Operation Power Up Diagnostics Channel Diagnostics Chapter 7 Module Diagnostics and Troubleshooting This chapter describes troubleshooting using the channel status LEDs as well as the module status LED It explains the types of conditions that might cause an error to be reported and gives suggestions on how to resolve the problem Major topics include module operation vs channel operation power up diagnostics channel diagnostics e LED indicators troubleshooting flowchart replacement parts e contacting Allen Bradley The module performs operations at two levels module level operations channel level operations Module level operations include functions such as power up configuration and communication with the SLC processor Channel level operations describe channel related functions such as data conversion and open circuit detection Internal diagnostics are performed at both levels of operation and any error conditions detected are immediately indicated by the module s LEDs At module pow
28. 4 6 two s complement binary numbers D 1 U under range error 5 14 fault bit 5 14 update time 4 5 See also channel update time module update time effects of filter time setting 4 7 related to cut off frequency 4 8 W wiring 3 1 routing considerations 3 3 terminal wiring 3 6 shield connections 3 9 worksheet B 1 OY Rockwell Aviomation Allen Bradley a Rockwell Automation Business has been helping its customers improve _ __ productivity and quality for more than 90 years We design manufacture and support a broad Allen Bradley range of automation products worldwide They include logic processors power and motion control devices operator interfaces sensors and a variety of software Rockwell is one of the world s leading technology companies SS Worldwide representation ee am ww Argentina e Australia e Austria e Bahrain e Belgium e Brazil e Bulgaria e Canada e Chile e China PRC e Colombia e Costa Rica e Croatia e Cyprus e Czech Republic e Denmark e Ecuador e Egypt e El Salvador e Finland e France e Germany e Greece e Guatemala e Honduras e Hong Kong e Hungary e Iceland e India e Indonesia e Ireland e Israel e Italy e Jamaica e Japan e Jordan e Korea e Kuwait e Lebanon e Malaysia e Mexico e Netherlands e New Zealand e Norway e Pakistan e Peru e Philippines e Poland e Portugal e Puerto Rico e Qatar e Romania e Russia CIS e Sa
29. 8 April 1997 5 8 Channel Configuration Data and Status Scaling Examples The following scaling examples show how to convert the channel data word from the configured data type to real units Real units are the values being measured such as temperature and pressure To perform the scaling you must know the defined voltage or current range for the channel s input type The lowest possible value for an input type is Sy ow and the highest possible value is Syicy Refer to the Channel Data Word Value tables on pages 5 5 and 5 6 for the data channel word ranges Engineering Units to Real Units Situation 1 A transducer is being used to measure temperature The 4 20 mA signal is proportional to 100 500 C 212 932 F The channel data word is in engineering units format The channel data 5500 Find Real units equivalent in F Equation Real Units Equivalent channel data value X scaling factor x ass Se input range where Stow 2129F SHIGH 932 F channel data word 5500 scaling for engineering units 1 WA per step 932 F 212 F Solution Real Units Equivalent 5500 x I uA x 20 mA dm 247 5 F Situation 2 A transducer is being used to measure temperature The 0 10V dc signal is proportional to 0 10 C The channel data word is in engineering units format The channel data 5000 Find Real units equivalent in C S 5S Equation Real Units Equivalent
30. Channel 3 Channel 3 Channel 4 Channel 4 Channel 5 Channel 5 Channel 6 Channel 6 Channel 7 Channel 7 Shield Installation and Wiring 3 7 Wiring Single Ended and Differential Inputs The diagram below shows typical wiring for the module Important Follow these guidelines when wiring the module Use shielded communication cable Belden 8761 and keep length as short as possible Connect only one end of the cable shield to earth ground Connect the shield drain wires for channels 0 3 to the top shield terminal Connect the shield drain wires for channels 4 7 to the bottom shield terminal Shield terminals are internally connected to chassis ground which is connected to earth ground via the SLC backplane Single ended source commons may be jumpered together at the terminal block Channels are not isolated from each other a differential signal source has an analog common it can not and must not be connected to the module Common mode voltage range is 10 5 volts The voltage between any two terminals must be less than 21 volts The module does not provide power for the analog inputs Use a power supply that matches the transmitter sensor specifications Power Supply Connections O Shield e ane Channel 0 sZ signal source 0 shield e
31. Impedance If the source impedance of the input device and associated cabling is too high it will affect the accuracy of the channel data word Source impedance of 500 ohms will produce up to 0 05 of module error over and above the specified accuracy of the module You can compensate for device impedance error by implementing the following equation in your ladder program Vs E V measured x R R j in where Vs input device voltage R input device source impedance Rin 1746 NI8 input impedance 1 MQ Publication 1746 6 8 April 1997 3 10 Installation and Wiring Publication 1746 6 8 April 1997 Wiring Input Devices to the 1746 NI8 After the analog input module is properly installed in the chassis follow the wiring procedure below using Belden 8761 cable ATTENTION Care should be taken to avoid connecting a voltage source to a channel configured for current input Improper module operation or damage to the voltage source can occur f Cut foil shield and drain wire Signal Wire Signal Wire Signal Wire Drain Wire Foil Shield Signal Wire Twist the drain wire and foil shield together and connect to earth ground or to the shield terminal on the 1746 NI8 module To wire your 1746 NI8 module follow these steps 1 At each end of the cable strip some casing to expose the individual wires 2 Trim the signal wires to 2 inch lengths Strip about 3 16 inch 5 mm of insulation away to exp
32. Looking for more information Artisan Visit us on the web at http www artisan scientific com for more information QUALITY INSTRUMENTATION GUARANTEED Price Quotations Drivers Technical Specifications Manuals and Documentation Artisan Scientific is Your Source for Quality New and Certified Used Pre owned Equipment Tens of Thousands of In Stock Items Fast Shipping and Delivery Eguipment Demos Hundreds of Manufacturers Supported Leasing Monthly Rentals Consignment Service Center Repairs InstraView Remote Inspection Experienced Engineers and Technicians on staff in our Remotely inspect equipment before purchasing with our State of the art Full Service In House Service Center Facility Innovative InstraView website at http www instraview com We buy used equipment We also offer credit for Buy Backs and Trade Ins Sell your excess underutilized and idle used equipment Contact one of our Customer Service Representatives today Talk to a live person 888 88 SOURCE 888 887 6872 Contact us by email sales artisan scientific com Visit our website http www artisan scientific com Allen Bradley SLC 500 User Analog Input Module M anu al Cat No 1746 NI8 Important User Information Because of the variety of uses for the products described in this publication those responsible for the application and use of this control equipment must satisfy themselves that all nec
33. NI8 module with the following setup 4 20 mA input type engineering units data format zero data word in the event of an open circuit 10 Hz input filter to reject high frequency noise and provide rejection of 60 Hz line noise Channel Configuration Worksheet With Settings Established for Channel 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 O Bit Number 0 0 0 0 1 1 0 0 0 0 0 0 0 1 0 1 Channel 0 N10 0 0 0 0 0 Channel 1 0 0 0 0 Channel 2 0 0 0 0 Channel 3 0 0 0 0 Channel 4 0 0 0 0 Channel 5 0 0 0 0 Channel 6 0 0 0 0 Channel 7 L Input Type Data Format Open Circuit Filter Frequency Channel Enable Not Used Bit Definitions Bits 0 2 naut Tee 000 10V dc 010 0 5V dc 100 0 20 mA 110 20 mA TB 001 1 5V dc 011 0 10V de 101 4 20 mA 111 20 1 mA dcm 000 engineering units 010 proportional counts 100 user defined scaling 110 illegal pus Data Format 001 scaled for PID 011 1746 NI4 data format 101 user defined scaling 111 illegal Bits6and7 Open Circuit 00 zero 01 upscale 10 downscale 11 illegal 000 no filter 010 50 Hz 100 10 Hz 110 2 Hz BIS B 10 FGE FREUEN SI idg Ta 011 20 Hz 101 5 Hz 111 1Hz Bit 11 Channel Enable 0 channel disabled 1 channel enabled Bits 12 15 Not Used 0000 always make this setting
34. O e 1 channel 1 configuration word bit mapped field O e 2 channel 2 configuration word bit mapped field O e 3 channel 3 configuration word bit mapped field O e 4 channel 4 configuration word bit mapped field O e 5 channel 5 configuration word bit mapped field O e 6 channel 6 configuration word bit mapped field O e 7 channel 7 configuration word bit mapped field O e 8 lower scale limit range 0 16 bit integer O e 9 upper scale limit range 0 16 bit integer O e 10 lower scale limit range 1 16 bit integer O e 11 upper scale limit range 1 16 bit integer After module installation and voltage or current is selected via the DIP switches each channel must be configured to establish the way the channel operates You configure the channel by entering bit values into the configuration word using your programming device A bit by bit examination of the configuration word is provided in the chart on page 5 2 Programming is discussed in chapter 6 Addressing is explained in chapter 4 The configuration word default setting is all zeros Publication 1746 6 8 April 1997 5 2 Channel Configuration Data and Status Channel Configuration The channel configuration word consists of bit fields the settings of Procedure Bit s Define 0 2 Input Type 3 5 Data Format 6and7 Open Circuit 8 10 Filter Frequency T Channel Enable 12 15 Unused which determine how the channel will operate S
35. Open Circuit Conditi To determine the exact error check the error pen uircuit Sonditon bits in the input image Check the channel configuration word for valid data Make sure Blinking Out of Range Condition that the data format is indicated correctly in bits 3 5 and that the open circuit selection state bits 6 and 7 is valid Refer to the On Channel Configuration Error troubleshooting flowchart on page 7 5 and to chapter 5 for more information Power Up No action required No action required For an example of how to Off enable a channel refer to chapter 2 Quick Channel NotEnabled Start or chapter 6 Ladder Logic Configuration Examples Module Status LED State Table If Module Status Indicated condition Corrective action LED is On Proper Operation No action required Cycle power If condition persists call your local on Module Fault distributor or Allen Bradley for assistance Publication 1746 6 8 April 1997 Module Diagnostics and Troubleshooting 7 3 Channel Status LEDs Green The channel status LED is used to indicate channel status and related error information contained in the channel status word This includes conditions such as normal operation channel related configuration errors open circuit errors out of range errors All channel errors are recoverable errors and after corrective action normal operation resumes Invalid Channel Configuration Whenever a c
36. Source N7 1 0 lt Dest 0 2 0 0000h lt If the selector switch is in the L3 position convert the scaled data word to BCD format and send the value to the LED display I 6 0 I 6 0 1 6 0 TOD 1 E 1 E 1 E To BCD 0 1 2 Source N7 2 0 lt Dest O 2 0 Scale the data word from the pressure transducer 0000h lt Then convert the scaled data word to BCD format and send the value to the LED display SCP Scale w Parameters Input I 1 3 0 lt Input Min 3500 3500 lt Input Max 20500 20500 lt Scaled Min 0 0 lt Scaled Max 200 200 lt Output N7 3 0 lt TOD To BCD Source N7 3 0 lt Dest 0 3 0 0000h lt Publication 1746 6 8 April 1997 8 10 Application Examples Scale the data word from the level sensor Then convert the scaled data word to BCD format and send the value to the LED display SCP 0007 Scale w Parameters J Input I 1 4 0 Input Min 3500 3500 Input Max 20500 20500 Scaled Min 6 6 Scaled Max 120 120 Output N7 4 0 lt TOD 0008 To BCD Source N7 4 0 lt Dest O 4 0 0000h lt lf the value of the level sensor is less than 12 High Level inches energize the High Level Warning Light Warning Light LES 0 5 0 0009 Less Than A lt B C Source A N7 4 1 0 Source B 12 12 lt If the value of the level sensor is greater than 110 Low Level inches energize the Low Level Warning Light Warn
37. a Word l 3 2 Slot 3 Channel 2 Data Word l 3 3 Slot 3 Channel 3 Data Word 1746 NI8 Input Addressing l 3 0 Slot 3 Channel 0 Data Word l 3 1 Slot 3 Channel 1 Data Word l 3 2 Slot 3 Channel 2 Data Word 3 3 Slot 3 Channel 3 Data Word l 3 4 Slot 3 Channel 4 Data Word l 3 5 Slot 3 Channel 5 Data Word l 3 6 Slot 3 Channel 6 Data Word l 3 7 Slot 3 Channel 7 Data Word l 4 0 Slot 4 Channel 0 Data Word 4 1 Slot 4 Channel 1 Data Word l 4 2 Slot 4 Channel 2 Data Word l 4 3 Slot 4 Channel 3 Data Word Channel Configuration Variable Content TTL Chap C 3 For the 1746 NIA input selection voltage or current is made via a switch For the 1746 NI8 input selection voltage or current is made via a switch and a configuration word is used to define the other operating parameters for the module The 1746 NI4 does not employ a configuration word To configure the 1746 NIS for the same input type as the 1746 NI4 use the following configuration word For voltage input you must select 10V dc and for current input you must select 20 mA Define a configuration word for channels 0 7 on the 1746 NI8 module Bit Number Current Input Voltage Input 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 0 0 0 O 1 1 00 00 0 1 1 1 1 0 0 0 0 0 1 1 0 0 00 0 1 1 0 0 0 A Input Type Data Format Open Ci
38. ac and 750V dc pulse withstand for 1 second Common Mode Voltage Range 10 5V 21V maximum between any two terminals Physical Specifications Description LED Indicators Specification 9 green status indicators one for each of 8 channels and one for module status Module ID Code Class 1 Interface 3526 Class 3 Interface 12726 Recommended Cable Belden 8761 or equivalent Maximum Wire Size Two 14 AWG wires per terminal Maximum Cable Impedance Voltage Source with less than 100 impedance 4092 maximum loop impedance for lt 1LSB error Current Source transmitter properly wired to its power supply 2509 maximum loop impedance to meet common mode voltage reguirements Terminal Block Removable Allen Bradley spare part Catalog Number 1746 RT25G Publication 1746 6 8 April 1997 Variable Content TTL Chap Environmental Specifications Description Operating Temperature Specification 0 C to 55 C 32 F to 131 F in any slot except slot 0 0 C to 60 C 32 F to 140 F in right most slot of chassis Storage Temperature 40 C to 85 C 40 F to 185 F Relative Humidity 5 to 95 without condensation Certification UL listed CSA approved CE compliant for all applicable directives Hazardous Environment Classification Class I Division 2 Hazardous Environment Input Specifications Description Type of Input Selectable Specificat
39. aled for PID and Proportional Counts 5 7 scaling Examples uu eu ve bt eer bt err RE tee 5 8 Engineering Units to Real Units v 5 8 Scaled for PID to Real Units 0 0 00 e eee eee 5 9 Proportional Counts to Real Units 5 9 1746 NI4 Data Format Units to Real Units 5 10 Table of Contents iii User Defined Limits Data Format to Real Units 5 10 Channel Status Checking 0 2 cece eee eee 5 11 Input Type Status Bits 0 2 0 cee eee eee 5 13 Data Format Type Status Bits 3 5 5 13 Open Circuit Type Status Bits 6and 7 5 13 Channel Filter Frequency Bits 8 10 5 13 Channel Status Bit 11 4 es rh RR Rr ER e tower ss 5 13 Open Circuit Error Bit 12 o e ws 5 14 Over Range Error Bit 13 Y uu 5 14 Under Range Error Bit 14 2 eee eee eee 5 14 Configuration Error Bit 15 YY Yu 5 14 Ladder Logic Configuration Examples 6 1 Initial Programming 0c cee 6 1 Procedur8 soaua Y Y ed y Y y 6 2 Interfacing to the PID Instruction 6 3 Monitoring Channel Status Bits Class 3 Mode Only 6 4 Module Diagnostics and Troubleshooting 7 1 Module Operation vs Channel Operation 7 1 Power Up Diag
40. ble enabled Not Used Publication 1746 6 8 April 1997 Reference Chapter 4 Preliminary Operating Considerations Appendix C Converting from 1746 NI4 to 1746 NI8 Your programming device s user manual Reference Chapter 4 Preliminary Operating Considerations Chapter 5 Channel Configuration Data and Status Appendix B NI8 Configuration Worksheet Appendix C Converting from 1746 NI4 to 1746 NI8 Quick Start 2 5 1746 NI8 Module Output Image Channel Configuration Class 1 Class 3 0 1 0 channel 0 configuration word bit mapped field 0 1 1 channel 1 configuration word bit mapped field 0 1 2 channel 2 configuration word bit mapped field 0 1 3 channel 3 configuration word bit mapped field 0 1 4 channel 4 configuration word bit mapped field 0 1 5 channel 5 configuration word bit mapped field 0 1 6 channel 6 configuration word bit mapped field 0 1 7 channel 7 configuration word bit mapped field 0 1 8 lower scale limit range 0 16 bit integer 0 1 9 upper scale limit range 0 16 bit integer 0 1 10 lower scale limit range 1 16 bit integer 03 11 upper scale limit range 1 16 bit integer a Program the configuration Do the programming necessary to establish the new configuration word setting in the previous step Chapter 6 1 Create integer file N10 Integer file N10 should
41. cale 11 illegal 000 no filter 010 50 Hz 100 10 Hz 110 2 Hz BE ee FODD c be 011 20 Hz 101 5 Hz 111 1Hz Bit 11 Channel Enable 0 channel disabled 1 channel enabled Bits 12 15 Not Used 0000 always make this setting The open circuit option is only valid for the 4 20 mA data format Publication 1746 6 8 April 1997 Application Examples 8 7 Program Set Up and Operation Summary 1 Set up one configuration word in memory for each channel The table below shows the configuration word allocation summary Channel Configuration Word Value 0 N10 0 L1 amps 1 N10 1 L2 amps 2 N10 2 L3 amps 3 N10 3 pressure psi 4 N10 4 liquid level inches 2 When the position of the three position selector changes convert the appropriate scaled data word to BCD and send the data to the LED display Amps PSI Liquid Level TEIT JW High Level JA Low Level Selector Switch Display Panel L1 1 6 0 L2 1 6 1 L3 I 6 2 3 If the liquid level goes below the low level set point turn on the low level warning light and if the liquid level goes above the high level set point turn on the high level warning light 4 Convert the individual analog scaled data words to BCD and send the data to the respective LED displays Publication 1746 6 8 April 1997 8 8 Application Examples Program Listing The first rung of this program sends the channel setup infor
42. cations A 1 PID input type 5 6 PID instruction 6 3 pinout diagram 3 6 Positive Decimal Values D 1 power requirements 3 1 power up sequence 1 3 programming alarms 6 4 configuration settings 2 5 6 1 initial setting 6 1 PID instruction 6 3 proportional counts input 5 6 R reconfiguration time 4 6 remote configuration definition G 3 removable terminal block 1 2 removing the module 3 4 resolution definition G 3 Index S scaled for PID 5 6 scaling definition G 3 scaling input data See input data scaling scan time G 2 self locking tabs 1 2 shield connections 3 6 3 9 slot disabling 4 6 software 2 4 4 1 C 1 specifications A 1 electrical A 1 environmental A 2 input A 2 physical A 1 start up instructions 2 1 status bit channel enable 1 3 fault condition 1 3 time to reset 4 6 time to set status LED See channel status LED or module status LED status word See also input image addressing 4 4 bit definition chart 5 12 definition G 3 module input image 5 11 step response time at filter frequency 4 7 definition G 3 in choosing filter frequency 5 4 system operation 1 3 T terminal pinout diagram 3 6 terminal wiring 3 6 wiring inputs 3 10 tools required for installation 2 1 transducer definition G 3 source impedance 3 9 wiring 3 10 troubleshooting contacting Allen Bradley P 4 flowchart 7 5 LED examination 7 2 turn off time 4 6 turn on time
43. contain one element for each channel used Ladder Logic For this example we only need one N10 0 Configuration 2 Enter the configuration parameters from step 7 for channel 0 into integer N10 0 Examples 3 Program an instruction in your ladder logic to copy the contents of N10 0 to output word O 1 0 Chapter 8 DATA FILE N10 Application Offset 15 14 13 12 11 10 9 8 7 6 5 4 3 2 Examples N10 0 0 0 O O 1 O 1 1 O O O O O O O 0 First Pass Bit Initialize 1746 NI8 COP On power up the first pass bit S l S 1 15 is set for one scan enabling f COPY FILE the COPY instruction that transfers 15 Source N10 0 the channel configuration word 0 Dest 0 1 0 Thi f bles tfi Length 1 is configures and enables the channel Publication 1746 6 8 April 1997 2 6 Quick Start EE Write the ladder program Chapter 5 Write the remainder of the ladder logic program that specifies how your analog input data will be Channel processed for your application In this procedure the module is located in slot 1 Configuration Data and Status 1514 13 12 11 10 9 8 7 6 5 4 3 2 1 O BitNumber Chapter 6 Ladder Logic o o o o olo o olo o o o olo o o Channelo Data Word ee eis variable input data g Examples 1746 NI8 Module Input Image Data Word Chapter 8 Application Class 1 Class 3 Examples 1 1 0 channel 0 data word 16 bit integer 44 channel 1 data word 16 b
44. cuit Type Status Bits 6 and 7 The open circuit bit field indicates how you have defined the response of the module to an open circuit condition This feature is active for the 4 20 mA input type only The open circuit field is cleared when the channel is disabled Channel Filter Frequency Bits 8 10 The channel filter frequency bit field reflects the filter frequency you selected in the configuration word This feature is active for all current and voltage input types The filter frequency bit field is cleared while the channel is disabled Channel Status Bit 11 The channel status bit indicates the operational state of the channel Once the channel enable bit is set the module will configure the channel and take the first data sample of the channel data word before setting the channel status bit The channel status bit is cleared upon power up and reset Publication 1746 6 8 April 1997 5 14 Channel Configuration Data and Status Publication 1746 6 8 April 1997 Open Circuit Error Bit 12 The open circuit error bit is set 1 whenever the channel detects an open circuit condition at its input The open circuit error is active for the 4 20 mA input type only The open circuit error state will always take precedence over the out of range error states There will never be an out of range error when an open circuit is detected The open circuit error bit is cleared when the channel is disabled or when the open circuit cond
45. d field l e12 channel 4 status word bit mapped field I e 13 channel 5 status word bit mapped field I e 14 channel 6 status word bit mapped field e 15 channel 7 status word bit mapped field The channel status word can be analyzed bit by bit In addition to providing information about an enabled or disabled channel each bit s status 0 or 1 tells you how the input data from the voltage or current analog sensor connected to a specific channel will be translated for your application The bit status also informs you of any error condition and can tell you what type of error occurred A bit by bit examination of the status word is provided in the chart on the following page Publication 1746 6 8 April 1997 5 12 Channel Configuration Data and Status Channel 0 7 Status Word l e 8 through l e 15 Bit Definitions Bit s Define hoea oN Sn Indicate this 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 o 0 0 0 10 V dc 0 0 1 1 5V dc 0 1 0 0 5V de 0 1 1 0 10V de 0 2 Input Type ilolo 0 20 mA 11010 1 4 20 mA 111 0 20 mA 1 1 14 0 1 mA 0 00 Engineering Units 0 0 1 Scaled for PID 01 0 Proportional Counts 3 5 Data Format 0101 1746 NI4 Data Format 1 0 0 User Defined Class 3 1 0 1 User Defined Class 3 Illegal configuration error Illegal configuration error 0 0 Zero EP 0 1 Upscale 6and7 OpenCircu
46. d is valid only when the channel is enabled and there are no channel errors Input words 8 15 status words contain the status of channels 0 7 respectively The status bits for a particular channel reflect the configuration settings that you entered into the output image configuration word for that channel and provide information about the channel s operational state To receive valid status information the channel must be enabled and the channel must have processed any configuration changes that may have been made to the configuration word Example To obtain the status of channel 2 input word 10 of the analog module located in slot 4 in the SLC chassis use address 1 4 10 File Type ln Word I 4 10 Element Word Delimiter Delimiter Chapter 5 Channel Configuration Data and Status gives you detailed bit information about the content of the data word and the status word Module Update Time Channel 0 Disabled Preliminary Operating Considerations 4 5 The 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 provide the resulting data values to the SLC processor Module update time can be calculated by adding the the sum of all enabled channel sample times 0 75 msec per channel The 1746 NI8 module sequentially samples the channels in a continuous loop Channel 1 Disabled Channel 2 Disabled Channel 3 Disabled Enabled
47. dition exists The input signal is less than the low scale limit for the channel Correct and retry Over range condition exists The input signal is greater than the upper scale limit for the channel Correct and Retry Yes Is problem corrected Bit 12 set 1 Lr An open circuit condition is present Check channel and wiring for open or loose connections Retry I Contact your local distributor or Allen Bradley Publication 1746 6 8 April 1997 7 6 Module Diagnostics and Troubleshooting Replacement Parts Contacting Allen Bradley Publication 1746 6 8 April 1997 The 1746 NI8 module has the following replaceable parts Part Part Number Replacement Terminal Block 1746 RT25G Replacement Terminal Cover 1746 R13 1746 NI8 User Manual 1746 6 8 If you need to contact Allen Bradley for assistance please have the following information available when you call a clear statement of the problem including a description of what the system is actually doing Note and record the LED states also note input and output image words for the module a list of things you have already tried to remedy the problem processor type and firmware FRN number See label on left side of processor hardware types in the system including I O modules and chassis fault code if the SLC processor is faulted Basic Example
48. e eight consecutive output words of the 1746 NI8 analog module beginning with word O 3 0 First Pass Bit Initialize 1746 NI8 S2 1 COP E COPY FILE 15 Source N10 0 Dest 0 3 0 Length 8 On power up bit S2 1 15 is set for the first program scan and integer file N10 is sent to the eight 1746 NI8 channel configuration words DATA FILE N10 Offset 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 N10 0 0 0 0 O 1 1 O O O O O O 1 10 1 N10 1 0 0 0 O 1 1 O O O O O O 1 1 0 1 N10 2 0 0 0 O 1 1 O O O O O O 1 10 1 N10 3 0 0 0 O 1 1 O O O O O O 1 1 0 1 N10 4 0 0 0 0 1 1 O O O O O O 1 10 1 N10 5 0 0 0 0 1 1 O O O O O O 1 1 0 1 N10 6 0 0 0 0 1 1 O O O O O O 1 1 0 1 N10 7 0 0 0 O 1 1 O O O O O O 1 10 1 Publication 1746 6 8 April 1997 Interfacing to the PID Instruction Ladder Logic Configuration Examples 6 3 The analog input module was designed to interface directly to the SLC 5 02 or later processor PID instruction without the need for an intermediate scale operation Example Use 1746 NI8 channel data as the process variable in the PID instruction 1 Select scaled for PID as the data format in the channel configuration word 2 Specify the 1746 NI8 channel data word as the process variable for the PID instruction Program Listing Initialize 1746 NI8 First Pass Bit Channel 0 S2 1 MOV 1 E MOVE 15 Source N10 0 3083 Channel 0 Dest O 3 0 Status 0 PID PID 4 Control Block N11 0 Proce
49. e increasingly attenuated Publication 1746 6 8 April 1997 4 8 Preliminary Operating Considerations Publication 1746 6 8 April 1997 The cut off frequency for each input channel is defined by its filter frequency selection Choose a filter frequency so that your fastest changing signal is below that of the filter s cut off frequency The cut off frequency should not be confused with update time The cut off frequency relates how the digital filter attenuates frequency components of the input signal The update time defines the rate at which an input channel is scanned and its channel data word is updated Aliasing Frequency Aliasing is a natural characteristic of discrete time sampling of analog signals This can result in erroneous data in the data channel word Aliasing is usually not a problem because the duration of the high frequency signal is much shorter than the program scan time Aliasing begins at a lower frequency when more channels are enabled Anti aliasing filters are available but it is recommended that you first check your transducer for malfunctions as the filters are fairly expensive Aliasing occurs when unwanted signals at a frequency greater than the effective sampling rate are present The effective sampling rate is determined by the number of enabled channels n The first aliasing frequency occurs at f 1 n 0 00075 Subsequent aliasing frequencies occur at integer multiples of fa The following
50. e operating IM4 o 0 035 M8 0 050 temperature range the 1746 NI8 module or multiple IM16 O 0 085 1746 NI8 modules should be placed in the right most OA8 0 185 slot s of the chassis The specification for operating OAP12 0 370 E temperature is OA16 0 370 IB8 0 050 i Operating Temperature Range ae Ns 0 C to 55 C 32 F to 131 F in any slot except slot 0 ITB16 A 0 085 0 C to 60 C 32 F to 140 F in right most slot of chassis ITV16 0 085 IV8 0 050 IV16 0 085 Fixed Expansion Chassis Considerations IG16 0 140 ove 0 138 Important The 2 slot SLC 500 fixed I O expansion chassis OV16 0 270 s i s OB8 n 0 135 7 1746 A2 will support only specific combinations of OBP8 6 0 135 modules If you are using the 1746 NI8 module in a OBP16 0 250 2 slot expansion chassis with another SLC I O or OVP16 0 250 communication module refer to the table at the left to 0G16 0 180 determine whether the combination can be supported OW4 o 0 045 0 045 ows 0 085 0 090 In the table E Tem gus A dot indicates a valid combination 0 g 0 060 0 049 No symbol indicates an invalid combination 1012 0 090 0 070 Ni4 0 025 0 085 I A triangle indicates an external power supply is NIB 0 200 0 100 required Refer to the Analog I O Module User NIO4I 0 055 0 145 en FIO4I 0 055 0 150 Manual publication 1746 6 4 c ns HE When using the table be aware that there are certain NT4 0 060 0 040 conditions
51. e right with 2 and ending at the left with 215 Each position can be 0 or 1 in the processor memory A 0 indicates a value of 0 a 1 indicates the decimal value of the position The equivalent decimal value of the binary number is the sum of the position values Positive Decimal Values The far left position is always 0 for positive values As indicated in the figure below this limits the maximum positive decimal value to 32767 all positions are 1 except the far left position For example 0000 1001 0000 1110 211 28 23 22 21 2048 256 8 4 2 2318 0010 0011 0010 1000 213429428495493 8192 512 256 32 8 9000 1x2 4 16384 16384 1x2137 8192 8192 1x2127 4096 4096 1x21 2048 2048 1x2107 1024 1024 13227 512 512 1x2 256 256 127 128 128 1x2 64 64 19732 32 105716 129 78 1274 2172 1x29 1 es oo ON 32767 0x21570 This position is always zero for positive numbers Publication 1746 6 8 April 1997 D 2 Variable Content TTL Chap Publication 1746 6 8 April 1997 Negative Decimal Values In two s complement notation the far left position is always 1 for negative values The equivalent decimal value of the binary number is obtained by subtracting the value of the far left position 32768 from the sum of the values of the other positions In the figure below all positions are 1 the value is 32767 32768 1 For example 1111 1000 0010 0011
52. e time The time required for the module to sample and convert the input signals of one enabled input channel and update the channel data word chassis A hardware assembly that houses devices such as I O modules adapter modules processor modules and power supplies common mode rejection ratio 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 input terminals relative to ground CMRR 20 Logio V1 V2 common mode voltage A voltage that appears in common at both input terminals of a differential analog input with respect to ground configuration word Contains the channel configuration information needed by the module to configure and operate each channel Information is written to the configuration word through the logic supplied in your ladder program Publication 1746 6 8 April 1997 G 2 Glossary Publication 1746 6 8 April 1997 dB decibel A logarithmic measure of the ratio of two signal levels data word A 16 bit integer that represents the value of the analog input channel The channel data word is valid only when the channel is enabled and there are no channel errors When the channel is disabled the channel data word is cleared 0 digital filter A filter implemented in firmware using discrete sampled data of the input signal filter A device
53. edures Guide Using A common procedures guide AML A l Series available on PASSPORT list price 50 00 ABT1 47 TSJS1 A procedural and reference manual for technical personnel who use the APS import export utility to convert APS files to ASCII APS Import Export User Manual 9399 APSIE and conversely ASCII to APS files A procedural and reference manual for technical personnel who Allen Bradley Hand Held Terminal User Manual 1747 NP002 use an HHT to develop control applications An introduction to HHT for first time users containing basic concepts but focusing on simple tasks and exercises and Getting Started Guide for HHT 1747 NM009 allowing the reader to guickly begin programming A reference manual that contains status file data and instruction Mi set information for the SLC 500 processors and MicroLogix 31G 00 MOD P Jrisiruetion Sel 1747 6 15 Reference Manual 1000 controllers In depth information on grounding and wiring Allen Bradley Allen Bradley Programmable Controller Grounding and 177041 programmable controllers Wiring Guidelines m PLC 5 Family Programmable Controllers Hardware A description on how to install a PLC 59 system Installation Manual 1785 6 6 1 A description of important differences between solid state programmable controller products and hard wired Application Considerations for Solid State Controls SGI 1 1 electromechanical devices Published by the c National Fire m wire sizes and t
54. ee eee 4 3 Output Image Configuration Words 4 3 Input Image Data Words and Status Words 4 4 Module Update Time 222 0000000 eb seed eee eee 4 5 Channel Turn On Turn Off and Reconfiguration Times 4 6 Response to Slot Disabling VVYYYY eee 4 6 Input RESPONSE 355 2 300 eh ate ate e Rn eo aet 4 6 Output Response c orc Sete te eae Cea es 4 6 Channel Filter Frequency Selection 4 7 Channel Step Response V YY YY Y eee 4 7 Channel Frequency YY YY YY Yu 4 7 Channel Cut Off Frequency YYYu 4 7 Aliasing Frequency 02 00 c cece eee eee eee 4 8 Noise Rejection 0 cee eee eee eee eee 4 10 Channel Configuration Data and Status 5 1 Channel Configuration Y YY eee 5 1 Channel Configuration Procedure 00e00 eee 5 2 Select Input Type Bits 0 2 YY eee 5 3 Select Data Format Bits 3 5 2 00 eee eee 5 3 Select Open Circuit State Bits 6 and 7 5 3 Select Channel Filter Frequency Bits 8 10 5 4 Select Channel Enable Bit 11 5 4 Unused Bits Bits 12 15 2 0 2 2 eee eee 5 5 Channel Data Word 5 2 ae RR Rex 5 5 Scaling the Channel Data Word V YY eee eae 5 6 Data Type Descriptions 2 0040 ene eee ns 5 6 Using Sc
55. ee the chart below and the descriptions that follow for configuration information Appendix B contains a configuration worksheet After determining the configuration for each channel follow the steps outlined in chapter 2 Quick Start or in chapter 6 Ladder Logic Configuration Examples to enter this configuration data into your ladder program and copy it to the 1746 NI8 module Channel Configuration Word 0 e 0 through O e 11 Bit Definitions Make these bit settings in the Channel Configuration Word To Select 154 14 13 124 11 10 9 8 7 6 5 4 3 2 1 O SET 10V de 0 0 0 DIP SWITCH 1 5V dc 0 0 1 TO OFF FORVOLTAGE 0 5V dc 0 1 0 ee 0 10V de 0 1 1 SET 0 20 mA 1 0 0 DIP SWITCH 4 20 mA 1 0 1 TO ON FORCURRENT 20 mA 111 0 Meur 0 1 mA 1 4 14 Engineering Units 0 07 0 Scaled for PID 0 0 1 Proportional Counts 0 1 0 1746 NI4 Data Format 0 1 1 User Defined Class 3 1 0 0 User Defined Class 3 1 0 1 Illegal configuration error Illegal configuration error Zero 0 0 Upscale 0 1 Downscale 150 Illegal No Filter 75 Hz 50 Hz 20 Hz 10 Hz 5Hz 2Hz lo2 2 ioioioi o olol l lolo o o o o 1Hz Channel Disabled 0 Channel Enabled 1 Unused 0 0 0 0 In addition to programming the configuration word you
56. eral Diagnostic Features The 1746 NI8 module contains diagnostic features that can help you identify the source of problems that may occur during power up or during normal channel operation These power up and channel diagnostics are explained in chapter 7 Module Diagnostics and Troubleshooting The module communicates to the SLC 500 processor through the parallel backplane interface and receives power from the SLC 500 power supply through the backplane The 5V dc backplane supply powers the SLC circuitry and the 24V dc backplane supply powers the module analog circuitry No external power supply is required You may install as many 1746 NI8 analog modules in your system as the power supply can support Each channel on the module can receive input signals from voltage or current analog input devices You configure each channel individually to accept either a voltage or current input signal System Operation At power up the module performs a check of its internal circuits memory and basic functions During this time the module status LED remains off If no faults are found during the power up diagnostics the module status LED is turned on After power up checks are complete the module waits for valid channel configuration data from your SLC ladder logic program channel status LEDs off After configuration data is written to one or more channel configuration words and the channel enable status bits are set the channel status LEDs
57. erup a series of internal diagnostic tests is performed These diagnostic tests must be successfully completed or a module error results and the module status LED remains off When a channel is enabled bit 11 1 a diagnostic check is performed to see that the channel has been properly configured In addition the channel is tested on every scan for configuration errors over range under range and for the 4 20 mA input type open circuit conditions Publication 1746 6 8 April 1997 7 2 Module Diagnostics and Troubleshooting A failure of any channel diagnostic test causes the faulted channel status LED to blink All channel faults are indicated in bits 12 15 of the channel s status word Channel faults are self clearing When the fault conditions are corrected the channel status LED will stop blinking and resume steady illumination Important If you clear 0 a channel enable bit 11 all channel status information is reset LED Indicators The module has nine LEDs Eight of these are channel status LEDs numbered to correspond to each of the input channels and one is a module status LED INPUT CHANNEL STATUS 0 2 4 6 Channel Status LEDs 1 3 5 7 Module Status LED MODULE STATUS ANALOG LED State Table If Module pelea Status Indicated Condition Corrective action LED is Status LED is On Channel Enabled No action required
58. essary steps have been taken to assure that each application and use meets all performance and safety requirements including any applicable laws regulations codes and standards The illustrations charts sample programs and layout examples shown in this guide are intended solely for purposes of example Since there are many variables and requirements associated with any particular installation Allen Bradley does not assume responsibility or liability to include intellectual property liability for actual use based upon the examples shown in this publication Allen Bradley publication SGI 1 1 Safety Guidelines for the Application Installation and Maintenance of Solid State Control available from your local Allen Bradley office describes some important differences between solid state equipment and electromechanical devices that should be taken into consideration when applying products such as those described in this publication Reproduction of the contents of this copyrighted publication in whole or in part without written permission of Allen Bradley Company Inc is prohibited Throughout this manual we use notes to make you aware of safety considerations ATTENTION Identifies information about practices or circumstances that can lead to personal injury or death property damage or economic loss Attention statements help you to identify a hazard avoid the hazard recognize the consequences Important Identifie
59. filter to reject high freguency noise and provide 60 Hz line noise rejection Configuration setup for level sensor channel 4 0 10V dc input type engineering units data format zero data word in the event of an open circuit 10 Hz input filter to reject high frequency noise and provide 60 Hz line noise rejection Publication 1746 6 8 April 1997 8 6 Application Examples Channel Configuration Worksheet With Settings Established for Channels 0 4 15 14 13 12 11 10 9 8 6 5 4 3 O Bit Number 0 0 0 0 1 1 0 0 0 0 0 0 1 Channel 0 N10 0 0 0 o o 4 1 0 0 0 o 0 o 1 Channel 1 N10 1 0 0 0 0 1 1 0 0 0 0 0 0 1 Channel 2 N10 2 0 0 0 0 1 1 0 0 0 0 0 0 1 Channel 3 N10 3 0 0 0 0 1 1 0 0 0 0 0 0 1 Channel 4 N10 4 0 0 0 0 Channel 5 0 0 0 0 Channel 6 0 0 0 0 Channel 7 A A Input Type Data Format Open Circuit Filter Frequency Channel Enable Not Used Bit Definitions Bits 0 2 iniu fuos 000 10V dc 010 0 5V dc 100 0 20 mA 110 20 mA PP 001 1 5V de 011 0 10V de 101 4 20 mA 111 20 1 mA rd 000 engineering units 010 proportional counts 100 user defined scaling 110 illegal BYR Datart ormat 001 scaled for PID 011 1746 NI4 data format 101 user defined scaling 111 illegal Bits6and7 Open Circuit 00 zero 01 upscale 10 downs
60. hannel s configuration word is improperly defined the channel status LED blinks and bit 15 of the channel status word is set Configuration errors occur when the data format bits 3 5 in the channel configuration word is invalid or when the open circuit state selection bits 6 and 7 is invalid Open Circuit Detection An open circuit test is performed on all enabled channels configured for 4 20 mA input Whenever an open circuit condition occurs see possible causes listed below the channel status LED blinks and bit 12 of the channel status word is set Possible causes of an open circuit include e The sensing device may be broken A wire may be loose or cut e The sensing device may not have been installed on the configured channel If an open circuit is detected the channel data word reflects input data as defined by the open circuit bits 6 and 7 in the channel configuration word Out Of Range Detection Whenever the data received at the channel data word is out of the defined operating range an over range or under range error is indicated and bit 13 over range or bit 14 under range of the channel status word is set Publication 1746 6 8 April 1997 7 4 Module Diagnostics and Troubleshooting Publication 1746 6 8 April 1997 Module Status LED Green The module status LED is used to indicate module related diagnostic or operating errors These non recoverable errors may be detected at power up or dur
61. i The channel data word is in proportional counts data format The channel data 21567 Real units equivalent in psi data value proportional count low default value proportional count full scale default value Stow 0 psi SHIGH 200 psi channel data 21567 proportional count low default value from table on page 5 6 32768 proportional count full scale default value from table on page 5 6 65535 21567 32678 Real Units Equivalent 0 psi om psi 0 psi x l 65535 165 55 psi Publication 1746 6 8 April 1997 5 10 Channel Configuration Data and Status 1746 NI4 Data Format Units to Real Units Situation Find Eguation where Solution A transducer is being used to measure flow rate The 10V dc to 10V dc signal is proportional to 0 100 GPM The channel data word is in 1746 NI4 data format The channel data 10000 Real units eguivalent in GPM S HIGH S an Real Units Equivalent channel data value x input range SLow 0 GPM SHIGH 100 GPM channel data word 5500 NI4 full scale default value from table on page 5 6 65535 100 GPM 0 GPM 65535 Real Units Equivalent 10000 x 15 26 GPM User Defined Limits Data Format to Real Units Situation Find Equation where Solution A transducer is being used to measure pressure The 10V dc to 10V dc signal is proportional
62. ignals The module performs well in the presence of common mode noise as long as the signals applied to the user terminals do not exceed the common mode voltage rating 10 5 Volts of the module Improper earth chassis ground connections may be a source of common mode noise Rejection of normal mode noise is implemented in the firmware and is a function of the filter frequency selected by the user A lower frequency filter will reject more normal mode noise than a higher frequency filter Transducer power supply noise transducer circuit noise or process variable irregularities may be sources of normal mode noise Channel Configuration Chapter 5 Channel Configuration Data and Status This chapter examines the channel configuration word and the channel status word bit by bit and explains how the module uses configuration data and generates status during operation It gives you information about how to e configure a channel scale the channel data check a channel s status The channel configuration word is a part of the 1746 NI8 module s output image as shown below The module output image uses 8 word values when the module is in Class 1 mode and 12 word values when the module is in Class 3 mode A description of the output image is shown below 1746 NI8 Module Output Image Channel Configuration Class1 Class 3 O e 0 channel O configuration word bitmappedfield
63. in the processor output image However this data is not transferred to the module The outputs are held in their last state When the slot is re enabled the current data in the processor image is transferred to the module Channel Filter Frequency Selection Filter Frequency 1 Hz Preliminary Operating Considerations 4 77 The module uses a digital low pass filter that provides noise rejection for the input signals The digital filter is programmable allowing you to select from eight filter frequencies for each channel Selecting a low value i e 1 Hz for the channel filter frequency provides the best noise rejection for a channel Selecting a high value for the channel filter frequency provides lower noise rejection and faster step response time See page 4 10 for more information on noise rejection The following table shows the available filter freguencies and step response for each filter freguency Step Response Time 1 Accuracy 730 msec module update time 0 1 Accuracy 1100 msec module update time 0 05 Accuracy 1200 msec module update time 2Hz 365 msec module update time 550 msec module update time 600 msec module update time 5 Hz 146 msec module update time 220 msec module update time 240 msec module update time 10 Hz 73 msec module update time 110 msec module update time 120 msec module update time 20 Hz 36 5 msec
64. ing Light GRT 0 5 0 0010 Greater Than A gt B C Source A N7 4 0 0 Source B 110 110 0011 END Data File DATA FILE N10 Offset 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 N10 0 0 0 O O 1 1 O O O O O O O 1 0 1 N10 1 0 0 O O 1 1 O O O O O O O 1 0 1 N10 2 0 0 O O 1 1 O O O O O O O 1 0 1 N10 3 0 0 O O 1 1 O O O O O O O 1 0 1 N10 4 0 0 O O 1 1 O O O O O O O O 1 1 Publication 1746 6 8 April 1997 Appendix A Specifications This appendix lists the specifications for the 1746 NI8 Analog Input Module Electrical Specifications Description Backplane Current Consumption Specification 200 mA at 5V dc 100 mA at 24V dc Backplane Power Consumption 3 4W maximum 1 0W 5V dc 2 4W 24V dc Number of Channels 8 backplane isolated I O Chassis Location Any I O module slot except slot 0 A D Conversion Method Successive approximation switched capacitor Input Filtering Low pass digital filter with programmable filter frequencies Normal Mode Rejection between input and input Provided by low pass filter Common Mode Rejection between inputs and chassis ground Greater than or equal to 75 dB at DC Greater than or equal to 100 dB at 50 60 Hz Input Filter Frequencies 1 Hz 2 Hz 5 Hz 10 Hz 20 Hz 50 Hz 75 Hz Calibration The module performs continuous autocalibration Isolation 50V dc continuous between the analog inputs and the backplane 530V
65. ing module operation Once in a module error state the 1746 NI8 module no longer communicates with the SLC processor Channel states are disabled and data words are cleared Failure of any diagnostic test results in a non recoverable error and requires the assistance of your local distributor or Allen Bradley Troubleshooting Flowchart Module Diagnostics Check LEDs on module Module Module Status LED off Status LED on Module fault Normal module condition operation Check to see End that module is seated properly in chassis Cycle power Is problem corrected End No Contact your local distributor or Allen Bradley Channel Status LED s blinking Fault condition Check channel status word bits 12 15 _ Bit 15 set 1 Bit 14 set 1 Bit 13 set 1 Lr and Troubleshooting 7 5 Channel Channel Status LED Status LED off on Channel is not enabled Channel enabled and working properly i desired by Enable channel if channel config word bit 11 1 Retry setting Configuration error Check configuration word bits 3 5 for valid data format configuration as well as bits 6 and 7 for valid configuration setting Retry s Under range con
66. ion 10V de 1 5V dc 0 5V de 0 10V dc 0 20 mA 4 20 mA 20 mA 0 1 mA Type of Data Selectable Engineering Units Scaled for PID Proportional Counts 32 768 to 32 767 range Proportional Counts User Defined Range Class 3 only 1746 NI4 Data Format Input Impedance 1 MQ Voltage Input maximum 30V between any two signal terminals Current Input maximum 30 mA Time to Detect Open Circuit 1 module scan Input Step Response See Chapter 4 Channel Filter Frequency Selection page 4 7 Input Resolution 1mVor1 pA Display Resolution 1mVor1 pA Overall Module Accuracy 0 C to 60 C 32 F to 140 F Voltage input types 10V dc 1 5V dc 0 5V dc 0 10V dc 0 1 Current input types 0 20 mA 4 20 mA 20 mA 0 05 Current input type 0 1 mA 0 5 Overall Module Drift Voltage input type 6 ppm C Current input type 12 ppm C Module Update Time See Chapter 4 Update Time page 4 5 Channel Turn On Time See Chapter 4 Turn On Time page 4 6 Channel Turn Off Time See Chapter 4 Turn Off Time page 4 6 Channel Reconfiguration Time See Chapter 4 Reconfiguration Time page 4 6 Publication 1746 6 8 April 1997 Configuration Worksheet Appendix B The following worksheet is provided to help you configure each of the channels on your module See Chapter 5 for detailed configuration information
67. is chapter will e tell you what equipment you need explain how to install and wire the module show you how to set up one channel for analog input examine the state of the LEDs at normal startup examine the channel status word Have the following tools and eguipment ready medium blade screwdriver e medium cross head screwdriver analog input device cable for wiring inputs to module e SLC processor and power supply installed in chassis e analog input module 1746 NI8 e programming device and software Publication 1746 6 8 April 1997 2 2 Quick Start Procedures IE Check the contents of shipping box Unpack the shipping box making sure that the contents include e analog input module Catalog Number 1746 NI8 removable terminal block factory installed If the contents are incomplete call your local Allen Bradley representative for assistance Ensure that your chassis and power supply support the 1746 NI8 Reference module Review the power requirements of your system to see that your chassis supports the module Chapter 3 e If combining a 1746 NI8 module with another I O module in a fixed controller refer to the I O Installation and module compatibility table found in chapter 3 Wiring For modular style systems calculate the total load on the system power supply using the procedure described in the SLC Installation amp Operation Manual for Modular Style Controllers publication 1747 6 2
68. it 19 Dijwristal Illegal configuration error 0 0 0 No Filter TE 75 Hz 0 1 0 50 Hz Filter olala 20 Hz En Freguency 1o o 10 Hz e 5 Hz 1 1 0 2 Hz 1 1 1 1Hz Channel 0 Channel Disabled i Status 1 Channel Enabled ij Open Circuit 0 No Error Error 1 Open Circuit Detected i Over Range 0 No error Error 1 Over Range Condition 44 Under Range 0 No Error Error 1 Under Range Condition 15 Configuration 0 No Error Error Configuration Error Publication 1746 6 8 April 1997 Important If the channel for which you are seeking status is disabled bit O e x 11 0 all bit fields are cleared The status word for any disabled channel is always 0000 0000 0000 0000 regardless of any previous setting that may have been made to the configuration word Channel Configuration Data and Status 5 13 Explanations of the status conditions follow Input Type Status Bits 0 2 The input type bit field indicates what type of input signal you have configured for the channel This field reflects the input type defined in the channel configuration word The input field is cleared when the channel is disabled Data Format Type Status Bits 3 5 The data format bit field indicates the data format you have defined for the channel This field reflects the data type selected in the channel configuration word The data format field is cleared when the channel is disabled Open Cir
69. it integer vers programming a evice s user 11 2 channel 2 data word 16 bit integer manual 1 1 3 channel 3 data word 16 bit integer l 1 4 channel 4 data word 16 bit integer 1 1 5 channel 5 data word 16 bit integer 1 1 6 channel 6 data word 16 bit integer 11 7 channel 7 data word 16 bit integer IE Go through the system start up procedure Apply power Download your program to the SLC processor and put the controller into Run mode Chapter 7 During a normal start up the module status LED and any enabled channel status LED turn on Module Diagnostics and Troubleshooting INPUT CHANNEL STATUS ol 4 4 Channel Status LEDs 1 3 5 7 MODULE STATUS Module Status LED ANALOG Publication 1746 6 8 April 1997 Quick Start 2 7 IE Check that the module is operating correctly Optional If the Module Status LED is off or if the Channel 0 LED is off or blinking refer to chapter 7 Class 3 Interface Monitor the status of input channel 0 to determine its configuration setting and operational status This is useful for troubleshooting when the blinking channel LED indicates that an error has occurred The example below shows the configuration for channel 0 with no errors 15 14 13 12 11 10 9 8 5 4 3 1 0 Bit Number 010 10 o 1 0 1 1 ololo 0 0 Chan
70. ition is removed Over Range Error Bit 13 The over range error bit is set 1 whenever a configured channel detects an over range condition for the channel data An over range condition exists when the input value is above the specified upper limit of the particular sensor connected to that channel The over range bit is cleared when the channel is disabled Under Range Error Bit 14 The under range error bit is set 1 whenever a configured channel detects an under range condition for the channel data An under range condition exists when the input value is below the specified lower limit of the particular sensor connected to that channel The under range bit is cleared when the channel is disabled Configuration Error Bit 15 The configuration error bit is set 1 whenever a configured channel detects that the channel configuration word is not valid All other status bits reflect the settings from the configuration word even those settings that may be in error The configuration error bit is cleared when the channel is disabled Initial Programming Chapter 6 Ladder Logic Configuration Examples Earlier chapters explained how the configuration word defines the way achannel operates This chapter shows the programming required to enter the configuration word into the processor memory It also provides you with segments of ladder logic specific to unique situations that might apply to your programming requirements The exam
71. its 6 and 7 Determine the desired state for the channel data word if an open circuit condition is detected for that channel Enter the 2 digit binary code in bit field 6 7 of the channel configuration word Open circuit errors are only detected for 4 20 mA input types bits 6 7 are ignored for other input types The open circuit options are zero upscale and downscale e If zero is selected the channel data word is forced to O during an open circuit condition e Selecting upscale forces the channel data word value to its full scale value during an open circuit condition The full scale value is determined by the selected input type and data format Selecting downscale forces the channel data word value to its low scale value during an open circuit condition The low scale value is determined by the selected input type and data format Publication 1746 6 8 April 1997 5 4 Channel Configuration Data and Status Publication 1746 6 8 April 1997 Important The processor may continue receiving data values for a period of time after the open circuit condition occurs until when the condition is flagged The module indicates an open circuit within one module scan times The module response time is shown below Module Response to Open Circuit Number of Channels Enabled Response Time maximum 1 0 75 msec 1 50 msec 2 25 msec 3 00 msec 3 75 msec 4 50 msec 5 25 msec o NIJA S n 6
72. lass 3 The 8 high impedance input channels can be wired as either single ended or differential inputs The module provides a direct interface to the following input types e 10V dc 1 5V dc 0 5V dc 0 10V dc 0 20 mA 4 20 mA 20 mA 0 1 mA The data presented to the processor can be configured as Engineering Units Scaled for PID Proportional Counts 32 768 to 432 767 range Proportional Counts with User Defined Range Class 3 only 1746 NI4 Data Format Reguires use of Block Transfer in a remote configuration Each input channel also provides open circuit out of range and invalid configuration indication via the LEDs In Class 3 operation these conditions are also in the channel status word Publication 1746 6 8 April 1997 1 2 Overview Channel Status LEDs Green INPUT CHANNEL STATUS SS r l 0j 2 4 6 1 3 5 7 Module Status MODULE STATUS LED Green LAwatos Removable VA Terminal Block o ie a e 8 8 a eo ed G0 Q Cable Tie Slots Door Label Important Status words are only available when the module is configured for Class 3 Hardware Features The module fits into any slot except the processor slot 0 in either an SLC 500 modular system or an SLC 500 fixed system expansion chassis 1746 A2 The module contains a removable terminal block providing connection for eight analog input cha
73. ley for technical assistance please review the information in the Troubleshooting chapter first Then call your local Allen Bradley representative Your Questions or Comments on this Manual If you find a problem with this manual please notify us of it on the enclosed Publication Problem Report If you have any suggestions for how this manual could be made more useful to you please contact us at the address below Allen Bradley Control and Information Group Technical Communication Dept A602V T122 P O Box 2086 Milwaukee WI 53201 2086 General Description Chapter 1 Overview This chapter describes the 1746 NI8 analog input module and explains how the SLC 500 processor gathers analog input from the module Included is information about e the module s hardware and diagnostic features an overview of system operation The module receives and stores digitally converted analog data into its image table for retrieval by all fixed and modular SLC 500 processors The module supports connections from any combination of up to eight voltage or current analog sensors The 1746 NIS is a multiclass Class 1 or Class 3 single slot module Class 1 configuration utilizes 8 input words and 8 output words Class 3 configuration utilizes 16 input words and 12 output words Fixed and SLC 5 01 processors can only operate as Class 1 The SLC 5 02 SLC 5 03 and SLC 5 04 processors can be configured for either Class 1 or C
74. mation to the 1746 NI8 module The next four rungs send the scaled data to the LED display based on the position of the selector switch Publication 1746 6 8 April 1997 Initialize the 1746 NI8 First Pass Bit Module Channels 0 4 S2 1 COP 0000 E Copy File 15 Source N10 0 Dest 0 1 0 Length 5 Scale the data word containing the current values from L1 L2 and L3 SCP 0001 Scale w Parameters Input I 1 0 0 lt Input Min 3500 3500 lt Input Max 20500 20500 lt Scaled Min 0 0 Scaled Max 400 400 Output N7 0 0 SCP Scale w Parameters Input I 1 1 0 Input Min 3500 3500 Input Max 20500 20500 Scaled Min 0 0 Scaled Max 400 400 Output N7 1 0 SCP Scale w Parameters Input I 1 2 0 Input Min 3500 3500 Input Max 20500 20500 Scaled Min 0 0 Scaled Max 400 400 Output N7 2 0 0002 0003 0004 0005 0006 Application Examples If the selector switch is in the L1 position convert the scaled data word to BCD format and send the value to the LED display 8 9 I 6 0 I 6 0 1 6 0 TOD E 1 E 1 t To BCD 0 1 2 Source N7 0 0 Dest 0 2 0 0000h If the selector switch is in the L2 position convert the scaled data word to BCD format and send the value to the LED display I 6 0 I 6 0 I 6 0 TOD 1 E 1 E 1 E To BCD 0 1 2
75. nel o A A A A Status Word I 1 8 Input Type Data Format Open Circuit Filter Frequency Channel Status Open Circuit Error Over Range Error Under Range Error Configuration Error Chapter 5 Channel Configuration Data and Status Chapter 7 Module Diagnostics and Troubleshooting Chapter 8 Application Examples Publication 1746 6 8 April 1997 Electrostatic Damage 1746 NI8 Power Requirements Chapter 3 Installation and Wiring This chapter tells you how to avoid electrostatic damage determine the chassis power requirement for the module choose a location for the module in the SLC chassis e set the channels for voltage or current analog input install the module wire the module s terminal block wire input devices Electrostatic dischar ge can damage semiconductor devices inside this module if you touch backplane connector pins Guard against electrostatic damage by observing the following precautions ATTENTION Electrostatic dischar ge can degrade performance or cause permanent damage Handle the module as stated below e Wear an approved wrist strap grounding device when handling the module e Touch a grounded object to rid yourself of electrostatic char ge before handling the module e Handle the module from the front away from the backplane connector Do not touch backplane connector pins e Keep the mod
76. ng the upper limit of the operating temperature range the 1746 NI8 module or multiple 1746 NI8 modules should be placed in the right most slot s of the chassis The specification for operating temperature is Operating Temperature Range 0 C to 55 C 32 F to 131 F in any slot except slot 0 0 C to 60 C 32 F to 140 F in right most slot of chassis 10 W 10 WH WS WS WS WA pe oof E o CS em X o CN yr TUN Top and Bottom MYM A Module Release s OWSA pee M Card Guide ERES X cs NE i Ni ee Publication 1746 6 8 April 1997 3 6 Installation and Wiring Terminal Wiring Publication 1746 6 8 April 1997 Module Removal Procedure 1 Press the releases at the top and bottom of the module and slide the module out of the chassis slot 2 Cover all unused slots with the Card Slot Filler Catalog Number 1746 N2 The 1746 NI8 module contains an 18 position removable terminal block The terminal pin out is shown below ATTENTION Disconnect power to the SLC before attempting to install remove or wire the removable terminal wiring block To avoid cracking the removable terminal block alternate the removal of the slotted terminal block release screws Terminal Block Terminal Block Spare Part Catalog Number 1746 RT25G Shield Channel 0 Channel 0 Channel 1 Channel 1 Channel 2 Channel 2
77. ngle A D converter to convert multiple analog signals However multiplexing also affects the speed at which an input signal can change and still be detected by the converter Module Calibration The module performs continuous autocalibration for all the channels that are enabled There is no need to invoke a calibration cycle to compensate for changes in temperature Required Tools and Equipment Chapter 2 Quick Start for Experienced Users This chapter can help you to get started using the 1746 NI8 analog input module We base the procedures here on the assumption that you have an understanding of SLC 500 products You should understand electronic process control and be able to interpret the ladder logic instructions required to generate the electronic signals that control your application Because it is a start up guide for experienced users this chapter does not contain detailed explanations about the procedures listed It does however reference other chapters in this book where you can get more information about applying the procedures described in each step It also references other documentation that may be helpful if you are unfamiliar with programming techniques or system installation requirements If you have any questions or are unfamiliar with the terms used or concepts presented in the procedural steps always read the referenced chapters and other recommended documentation before trying to apply the information Th
78. nnels which is specifically designed to interface with analog current and voltage input signals The channels can be wired as either single ended or differential inputs There are no output channels on the module Module configuration is done via the user program There are DIP switches on the circuit board for selecting voltage or current input Side Label BIN 9PZL QA xo AML aooo cd NR 00S D1S y 3na0N 1ndNI DOTWNY FE y sao INAN B we DIP Switches abeyon Moun9 Notons INzuuno NO abeyon quaung iE E Self Locking Hardware Feature Function Channel Status LED Indicators Displays channel operating and fault status Module Status LED Displays module operating and fault status Side Label Nameplate Provides module information Removable Terminal Block Provides physical connection to input devices Door Label Permits easy terminal identification Cable Tie Slots Secures and route wiring from module Self Locking Tabs Secures module in chassis slot Voltage current Selection DIP Switches Selects voltage or current input type to match the analog sensor Publication 1746 6 8 April 1997 System Overview Overview 1 3 Gen
79. nostics 00 cece eee eee 7 1 Channel Diagnostics os ted en erates cae eke een 7 1 LED TrdICalOIS HF Sees bosco bot case eS 7 2 Channel Status LEDs Green 0 00 eee ee 7 3 Invalid Channel Configuration 7 3 Open Circuit Detection llle 7 3 Out Of Range Detection 00 ccc eee eens 7 3 Module Status LED Green VV Y eee 7 4 Troubleshooting Flowchart V YY eee eee 7 5 Replacement Parts 22 0 6 cee YY nn 7 6 Contacting Allen Bradley 0 0 0c cece YY eae 7 6 Application Examples 8 1 Application Setup Display a Current amperage Value 8 1 Basic EXaImple cx suele GU CE EH CR 8 1 Device Configuration 00 cece eee Y ees 8 1 Channel Configuration 0 cece eee Y uu 8 2 Channel Configuration Worksheet With Settings Established for Channel 0 8 2 Program Listing Ss oco es 2 RR Rigi beeen tints 8 3 Data File oo rola me oic Y aca Dub a steht e 8 3 Application Setup Display Amps PSI and Liquid Level 8 4 Supplementary Example 0000 0 eee Y eae 8 4 Device Configuration Y eee Y ees 8 4 Channel Configuration 00 cece eee eee 8 5 iv Table of Contents Channel Configuration Worksheet With Settings Established for Channels 0 4 8 6 Program Set Up and Operation Summary 8 7 P
80. nstallation and Wiring Lees 3 1 Electrostatic Damage 2 2 eee eee eee es 3 1 1746 NI8 Power Requirements 3 1 Modular Chassis Considerations 3 2 Module Location in Chassis s an anaana 3 2 Fixed Expansion Chassis Considerations 3 2 General Considerations 000 cece eee eens 3 3 Compliance to European Union Directives 3 3 EMG DIIG6llV8 ivi E33 wi RE XR aar b eR 3 3 Module Installation and Removal 00eeeeeeee 3 4 Terminal Block Removal YY YY Y Y au 3 4 Switch Settings to Select Voltage or Current Input 3 4 Module Installation Procedure v 3 5 Module Removal Procedure 00 cee Yu 3 6 Table of Contents Terminal Wiring a ove ek Y See ee ee ees 3 6 Terminal Blook 222 85 e nets oak eee wee a Eae spit 3 6 Wiring Single Ended and Differential Inputs 3 7 Wiring Guidelines 00 00 cc cece eee ee 3 9 INPULDEVICES 24 Pe iach us dace se y ree Beta hee 3 9 Wiring Input Devices to the 1746 NI8 3 10 Preliminary Operating Considerations 4 1 Module ID Code ss rs DUDEN PEU anc een REA 4 1 Class 1 and Class 3 Interface V YY Yu 4 2 Module Addressing cece ee eee Y eee eee 4 2 Class 1 Memory Map YY YF Y Yu 4 2 Class 3 Memory Map YY YY Y eee e
81. nts listed contact your local Allen Bradley office or distributor For Read This Document Document Number An overview of the SLC 500 family of products SLC 500 System Overview 1747 2 30 A description on how to install and use your Modular SLC 500 Installation amp Operation Manual for Modular Hardware 1747 6 2 programmable controller Style Programmable Controllers A description on how to install and use your Fixed SLC 500 Installation amp Operation Manual for Fixed Hardware Style 147621 programmable controller Programmable Controllers A procedural manual for technical personnel who use APS to Rockwell Software Advanced Programming Software 9399 APSUM develop control applications APS User Manual An introduction to APS for first time users containing basic concepts but focusing on simple tasks and exercises and APS Quick Start for New Users 9399 APSQS allowing the reader to quickly begin programming SLC 500 Software Programmer s Quick Reference A training and quick reference guide to APS Guide Using APS available on PASSPORT list price ABT 1747 TSG001 50 00 f SLC 500 Troubleshooting Guide Using A I Series A training and quick reference guide to A I available on PASSPORT list price 50 00 ABT 1747 TSJ21 SLC 500 Family Common Procedures Guide Using A common procedures guide to APS APS available on PASSPORT list price 50 00 ABT 1747 T550 SLC 500 Family Common Proc
82. or the SLC 500 Family System Overview publication 1747 2 30 The 1746 NI8 backplane current consumption is 200 mA at 5V dc and 100 mA at 24V dc FEM Select voltage or current input type to match the analog sensor Appendix A Specifications The voltage current selection DIP switches are located on the side of the module The switch Chapter 3 settings are OFF VOLTAGE INPUT and ON CURRENT INPUT Installation and Wiring e SLC 3005 MODULE T746 Ni8 i CURRENT 012 012 012 0 12 LM umm jm jn VOLTAGE CHO CH7 L Publication 1746 6 8 April 1997 Quick Start 2 3 EM Insert the 1746 NI8 module into the chassis ATTENTION Never install remove or wire modules with power applied to the chassis or devices wired to the module Make sure system power is off then insert the module into your 1746 chassis Chapter 3 In this example procedure local slot 1 is selected Installation and Important For applications using the upper limit of the operating temperature range the 1746 NI8 Wiring module or multiple 1746 NI8 modules should be placed in the right most slot s of the chassis The specification for operating temperature is 0 C to 55 C 32 F to 131 F in any slot except slot 0 0 C to 60 C 32 F to 140 F in right m
83. ose the end of the wire 3 At one end of the cable twist the drain wire and foil shield together This end of the cable will be connected to one of the shield terminals on 1746 NI8 module Connect shields for channels 0 3 to the upper shield terminal and shields for channels 4 7 to the lower shield terminal 4 At the other end of the cable cut the drain wire and foil shield back to the cable 5 Connect the signal wires and the shield drain wire to the 1746 NI8 terminal block Connect the other end of the cable to the input device 6 Repeat steps 1 through 6 for each channel on the module Module ID Code Chapter 4 Preliminary Operating Considerations This chapter explains how the analog input module and the SLC 500 processor communicate through the module s input and output image It lists the preliminary setup and operation required before the module can function in a 1746 I O system Topics discussed include how to e enter the module ID code select the Class 1 or Class 3 interface address your 1746 NI8 module select the proper input filter for each channel calculate the module update time e interpret the module response to slot disabling The module identification code is a unique number encoded for each 1746 I O module The code defines for the processor the type of I O or specialty module residing in a specific slot in the 1746 chassis Catalog Number ID Code 3526 Class 1 interface 1746 NI8
84. ost slot of chassis Top and Bottom KUNG Module Release s AN m wa Connect sensor cable Connect sensor cable to the module s terminal block Chapter 3 Important Follow these guidelines when wiring the module Installation and Wiring Use shielded communication cable Belden 8761 and keep length as short as possible Connect only one end of the cable shield to earth ground Connect the shield drain wires for channels 0 3 to the top shield terminal Connect the shield drain wires for channels 4 7 to the bottom shield terminal Shield terminals are internally connected to chassis ground which is connected to earth ground via the SLC backplane Single ended source commons may be jumpered together at the terminal block Channels are not isolated from each other All analog commons are connected together internally Ifa differential signal source has an analog common it can not and must not be connected to the module Common mode voltage range is 10 5 volts The voltage between any two terminals must be less than 21 volts The module does not provide power for the analog inputs Terminal Block Use a power supply that matches the transmitter sensor specifications Sensor Cable Publication 1746 6 8 April 1997 2 4 Guick Start DEM Configure the system Configure your system I O for the particular slot the 1746 NI8 is in slot 1 in this example Enter the module ID code The ID code i
85. pecific slot in the 1746 chassis Using your programming device configure the slot with the appropriate ID code In this example the 1746 NIS is in slot 3 Catalog Number ID Code 3526 Class 1 interface LENG 12726 Class 3 interface Important All programming software does not support configuration for Class 3 operation e Advanced Programming Software APS supports Class 3 configuration After entering the ID code 12726 enter 16 input words and 12 output words SLC 500 A I Series Programming Software supports Class 3 configuration After entering the ID code 12726 enter 16 input words and 12 output words e RSLogix 500 version 1 30 or later supports Class 3 configuration After entering the ID code 12726 select Class 3 operation Earlier versions of RSLogix 500 will only support configuration for Class 1 operation Contact Rockwell Software for information on upgrading your software See chapter 4 for more information on Class 1 and Class 3 interfaces Publication 1746 6 8 April 1997 C 2 Variable Content TTL Chap Addressing SLOT 0 1 2 3 4 5 SLOT 0 1 2 3 4 Publication 1746 6 8 April 1997 5 Addressing is changed from two modules with 4 channels to one module with 8 channels The input addressing is shown below 1746 NI4 Input Addressing l 3 0 Slot 3 Channel 0 Data Word 3 1 Slot 3 Channel 1 Dat
86. ple segments include e initial programming of the configuration word e interfacing the analog module to a PID instruction monitoring channel status bits Class 3 Mode only To enter data into the channel configuration word O e 0 through O e 7 when the channel is disabled bit 11 0 follow these steps Refer to page 5 2 for specific configuration details Example A 1746 NIS analog module is residing in slot 3 of a 1746 chassis Configure all eight channels with the same parameters 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Bit Number 0 0 0 0 11 11 0 0 10 0 0 0 1 1 0 1 Bit Setting A Input Type 4 20 mA Data Format scaled for PID Open Circuit zero if open circuit Filter Frequency 10 Hz Channel Enable enabled Not Used This example transfers configuration data and sets the channel enable bits of all eight channels with a single File Copy instruction Publication 1746 6 8 April 1997 6 2 Ladder Logic Configuration Examples Procedure 1 Create integer file N10 Integer file N10 should contain eight elements N10 0 through N10 7 2 Enter the configuration parameters for all eight analog input channels into a source integer data file N10 See Appendix B for the channel configuration worksheet 3 Program a rung in your ladder logic to copy the contents of integer file N10 to th
87. r O Signal Transmitter Supply Signal Ground Wiring Schematics for 2 3 and 4 Wire Analog Input Devices 2 Wire Transmitter Transmitter O Transmitter Supply Signal GND Transmitter Signal Input Devices Installation and Wiring 3 9 Wiring Guidelines ATTENTION To prevent shock hazard care should be taken when wiring the module to analog signal sources Before wiring any analog module disconnect power from the SLC 500 system and from any other source to the analog module Follow the guidelines below when planning your system wiring To limit noise keep signal wires as far away as possible from power and load lines To ensure proper operation and high immunity to electrical noise always use Belden 8761 shielded twisted pair or equivalent wire Connect the shield drain wire to the shield terminal on the 1746 NI8 module Up to four shield wires may be connected to each shield connection screw terminal that provides a connection to chassis ground Tighten terminal screws using a flat or cross head screwdriver Each screw should be turned tight enough to immobilize the wire s end Excessive tightening can strip the terminal screw The torque applied to each screw should not exceed 5 Ib in 0 565 Nm for each terminal Follow system grounding and wiring guidelines found in your SLC 500 Modular Hardware Style Installation and Operation Manual publication 1747 6 2 Transducer Source
88. rcuit Filter Frequency Channel Enable Not Used Bit Definitions for Converting from 1746 NI4 to 1746 NI8 Bits 0 2 Input Type 000 10V dc 110 20 mA Bits 3 5 Data Format 011 1746 NI4 data format Bits 6 and 7 Open Circuit 00 zero the open circuit option is not available for the 20 mA data type Bits 8 10 Filter Frequency 100 10 Hz Bit 11 Channel Enable 0 channel disabled 1 channel enabled Bits 12 15 Not Used 0000 always make this setting Ladder Program See chapter 5 for more detailed information on channel configuration To convert your ladder program from the 1746 NI4s to a 1746 NIS you only need to change the module addressing Change the addresses in the program slot and word sub element number to reflect the location of the new module See chapter 6 for more information on ladder programming Publication 1746 6 8 April 1997 Appendix D Two s Complement Binary Numbers The SLC 500 processor memory stores 16 bit binary numbers Two s complement binary is used when performing mathematical calculations internal to the processor Analog input values from the analog modules are returned to the processor in 16 bit two s complement binary format For positive numbers the binary notation and two s complement binary notation are identical As indicated in the figure on the next page each position in the number has a decimal value beginning at th
89. rogram Sting Gn Sc Des ep ow CAD ER ERU SE 8 8 Data File Y chi ed cuc he tee ees eet retia 8 10 Specifications 1 Ceca teria terre ef adis eos aa A 1 Electrical Specifications V Y uu A 1 Physical Specifications se mere HE emet A 1 Environmental Specifications 2 c eee eee eee A 2 Input Specifications 2 2 5299 Rer Rete EE A 2 Configuration Worksheet B 1 Converting from 1746 NI4 to 1746 NI8 C 1 Module ID Code seh ere E sin REX OR eR E tae d C 1 Addressing ci tha drum oido bs alee Seaweeds fuis C 2 Channel Configuration llis C 3 Ed oC MR meee ee eee C 3 Two s Complement Binary Numbers D 1 Positive Decimal Values VYF Y YL D 1 Negative Decimal Values 0 0c Y ee eeees D 2 Glossary ineno nme i I ra eee Mac a raa G 1 Who Should Use this Manual Purpose of this Manual Preface Read this preface to familiarize yourself with the rest of the manual This preface covers the following topics who should use this manual the purpose of this manual contents of this manual related documentation common techniques used in this manual e Allen Bradley support Use this manual if you are responsible for the design installation programming or maintenance of an automation control system that uses Allen Bradley small logic controllers You should have a basic understanding of SLC 500 prod
90. s 2 Grasp the terminal block at the top and bottom and pull outward and down 3 o Terminal S Block Release Screws 3j 3 Switch Settings to Select Voltage or Current Input Select between voltage and current inputs before installing the module in the chassis Use the DIP switches on the module circuit board The switch settings are OFF VOLTAGE INPUT and ON CURRENT INPUT Do this for channels 0 7 l Ll Tn SLC 500 wr ANALOG INPUT MODULE T746 NI8 nw capes ig K io aba m H o 3 5 TIT CLASS 1 GROUPS A B C AND D DI Z E WY CRUS TP REST Alten Bradley MADE INUAA CURRENT We ef a VOLTAGE CHO CH7 Installation and Wiring 3 5 Module Installation Procedure 1 Align the circuit board of the analog input module with the card guides located at the top and bottom of the chassis 2 Slide the module into the chassis until both top and bottom retaining clips are secured Apply firm even pressure on the module to attach it to its backplane connector Never force the module into the slot 3 Cover all unused slots with the Card Slot Filler Catalog Number 1746 N2 Important For applications usi
91. s 3526 for Class 1 interface and 12726 for Class 3 interface See chapter 4 for more information on Class 1 and Class 3 interfaces Important All programming software does not support configuration for Class 3 operation Advanced Programming Software APS supports Class 3 configuration After entering the ID code 12726 enter 16 input words and 12 output words SLC 500 A l Series Programming Software supports Class 3 configuration After entering the ID code 12726 enter 16 input words and 12 output words RSLogix 500 version 1 30 or later supports Class 3 configuration After entering the ID code 12726 select Class 3 operation Earlier versions of RSLogix 500 will only support configuration for Class 1 operation Contact Rockwell Software for information on upgrading your software If you are converting from a 1746 NI4 to a 1746 NI8 based system see Appendix C 7 Determine the operating parameters Determine the operating parameters for channel 0 This example shows the channel 0 configuration word The module is in slot 1 The default configuration word is all zero s 15 14 13 12 1 10 9 8 7 6 5 4 3 2 1 O Bit Number o o ojo 1 o 1 1 o o o o oj o o o Chanelo A A A A Input Type 10V de Data Format engineering units Open Circuit only used for 4 20 mA input type Filter Frequency 20 Hz Channel Ena
92. s information that is critical for successful application and understanding of the product SLC SLC 500 SLC 5 02 SLC 5 03 SLC 5 04 and MicroLogix are trademarks of Allen Bradley Company Inc A I Series and RSLogix 500 are trademarks of Rockwell Software Inc Table of Contents Important User Information 1 Prefa GG wu a a MA eas P 1 Who Should Use this Manual FY YY ug P 1 Purpose of this Manual Y Y Y Y ees P 1 Contents of this Manual YY Y Y uu P 2 Related Documentation VYYY Y eens P 3 Common Techniques Used in this Manual P 4 Allen Bradley Support sseuueeeeeeennssenee P 4 Local Product Support YY Y YY a P 4 Technical Product Assistance P 4 Your Questions or Comments on this Manual P 4 OVEIVIOW i Loa cesi ux ue E EN aA 1 1 General Description 00 cece eee eee eee 1 1 Hardware Features 0 YY Y ug 1 2 General Diagnostic Features 000 0 ee eeeeee 1 3 System Overview Y YY eee 1 3 System Operation ss ires Dx RR o coe EE MEE 1 3 Module Operation ssluueeeeseeeeeeensee 1 4 Module Calibration ed eret e O Y CC Y YU HR ens 1 4 Quick Start for Experienced Users 2 1 Required Tools and Equipment 2 1 Procedures as i peered DEG ex aer TR ee hae E 2 2 I
93. sition from 1 to 0 in the status word after 1to 7 msec resetting the enable bit in the configuration maximum word The time it takes to change a channel configuration if the device type filter freguency Reconfiguration or configuration error bits are different from the 101 to 107 msec Time current setting The enable bit remains in a maximum steady state of 1 Changing data format does not reguire reconfiguration time 101 to 107 msec maximum Turn Off Time O The duration varies with the number of channels that are enabled By writing to the status file in your modular SLC processor you can disable any chassis slot Refer to your programming device s manual for the slot disable enable procedure ATTENTION Always understand the implications of disabling a module before using the slot disable feature Input Response When a slot is disabled the 1746 NI8 module continues to update its input image table However the SLC processor does not read inputs from a module that is disabled Therefore when the processor disables the module slot the module inputs appearing in the processor image table remain in their last state and the module s updated image table is not read When the processor re enables the module slot the current state of the module inputs are read by the processor during the subsequent scan Output Response The SLC processor may change the module output data configuration as it appears
94. ss Variable I 3 0 Control Variable N11 23 Control Block Length 23 SCL Scale Source N11 23 The Rate and Offset parameters should be set per your application The Dest Rate 10000 will typically be an analog output channel Refer to your programming Offset device s user manual or Analog I O Modules User Manual for specific Dest examples of the SCL instruction JENDI DATA FILE N10 Offset N10 0 15 14 13 12 11 10 0 0 0 O 1 1 O O O O O O 1 o Publication 1746 6 8 April 1997 6 4 Monitoring Channel Status Bits Class 3 Mode Only Ladder Logic Configuration Examples This example shows how you could monitor the open circuit error bits of each channel and set an alarm in the processor if one of the channels opens An open circuit error can occur if the analog input device breaks or one of the sensor wires gets cut or disconnected from the terminal block Program Listing First Pass Bit Initialize 1746 NI8 S2 1 COP Copy File 15 Source N10 0 Dest 0 3 0 Length 8 Channel 0 Channel 0 Channel 0 Status Open Alarm I 3 8 I 3 8 O 2 0 1 E E 11 12 0 Channel 1 Channel 1 Channel 1 Status Open Alarm I 3 9 I 3 9 O 2 0 t E 11 12 1 e e e e e e e e e Channel 7 Channel 7 Channel 7 Status Open Alarm I 3 15 I 3 15 0 2 0 t E 11 12 7 END DATA FILE N10 Offset 15 14 13
95. t filter See filter frequency input image 2 6 See also status word and data word definition G 2 input response to slot disabling 4 6 input specifications A 2 input types A 2 installation 3 1 3 5 equipment required 2 1 getting started 2 1 heat and noise considerations 3 3 location in chassis 2 3 3 2 L LEDs 1 2 channel status indicators 1 2 module status indicator 1 2 state tables 7 2 local configuration definition G 2 LSB 5 6 definition G 2 M memory map 4 2 4 3 module ID code 2 4 4 1 C 1 how to enter 2 4 4 1 C 1 module operation 1 4 module scan time definition G 2 minimizing 5 4 response to open circuit 5 4 module status LED 2 6 module update time calculating 4 5 definition G 2 for number of channels enabled 4 5 increased by reconfiguration 5 4 multiplexer definition G 2 multiplexing 1 4 N negative decimal values D 2 noise filtering 4 7 normal mode rejection definition G 3 Index l 3 0 open circuit 7 3 defining conditional state of channel data 5 3 downscale enable 5 3 upscale enable 5 3 zero 5 3 error condition 7 3 fault detection bit 5 14 module response to 5 4 5 13 operation module 1 4 system 1 3 out of range error 7 3 over range error 5 14 under range error 5 14 output image 2 5 4 3 definition G 3 output response to slot disabling 4 6 over range error 5 14 fault indicator bit 5 14 P physical specifi
96. tch allows the operator to choose between displaying the current draw for L1 L2 or L3 of the three phase motor Two warning pilot lights indicate a low or high liquid level condition in the holding tank Each display is a 3 digit 7 segment display The displays have DC sinking inputs and use BCD data format Device Configuration Scena orm Amps PSI Liquid Level OA A ANN ANN REISEN L2 High Level Spero uU 13 JA High Leve 2 o o o E a JA Low Level o SSIS SSIS Pry ES Ge De Des EB Selector Switch Display Panel O 9 L1 I 6 0 C V L2 1 6 1 L3 1 6 2 Pressure r Transducer Sensor Holding Tank Li L L2 Current Transducers Three Phase Motor Publication 1746 6 8 April 1997 e Valve d Kt i Incoming Supply Application Examples 8 5 Channel Configuration Configuration setup for current transducers channels 0 1 and 2 4 20 mA input type engineering units data format zero data word in the event of an open circuit 10 Hz input filter to reject high freguency noise and provide 60 Hz line noise rejection Configuration setup for pressure transducer channel 3 4 20 mA input type engineering units data format zero data word in the event of an open circuit 10 Hz input
97. that passes a signal or range of signals and eliminates all others filter frequency 3 dB frequency The user selectable frequency full scale error gain error The difference in slope between the actual and ideal analog transfer functions full scale range FSR The difference between the maximum and minimum specified analog input values gain drift The change in full scale transition voltage measured over the operating temperature range of the module input data scaling The data formats that you select to define the logical increments of the channel data word These may be scaled for PID or Engineering Units which are automatically scaled They may also be proportional counts which you must calculate to fit the resolution of the quantity being measured in your application input image The input from the 1746 NI8 module to the SLC processor The input image contains the module data words and status words local configuration A control system where all the chassis are located within several feet of the processor and chassis to chassis communication is via a 1746 C7 or 1746 C9 ribbon cable LSB Least Significant Bit The bit that represents the smallest value within a string of bits module scan time same as module update time module update time 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 SLC
98. ucts You should understand electronic process control and be able to interpret the ladder logic 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 this product This manual is a learning and reference guide for the 1746 NI8 Analog Input Module It contains the information you need to install wire and configure the module It also provides diagnostic and troubleshooting information and application examples Publication 1746 6 8 April 1997 P 2 Preface Publication 1746 6 8 April 1997 Contents of this Manual Chapter Title Content Describes the purpose background and scope of this manual Also specifies the audience for whom Preface this manual is intended and gives directions to using Allen Bradley support services Provides listing of related documentation Provides a hardware and system overview Explains 1 Overview P and illustrates the theory behind the input module 9 Quick Start for Experienced Serves as a Quick Start Guide for the experienced Users user 3 Installation and Wiring Provides installation information and wiring guidelines Gives you the background information you need to 4 Preliminary Operating understand how to address and configure the Considerations module for optimum operation as well as how to make changes once the module
99. udi Arabia e Singapore e Slovakia e Slovenia e South Africa Republic e Spain e Sweden e Switzerland e Taiwan e Thailand e Turkey e United Arab Emirates e United Kingdom e United States e Uruguay e Venezuela Yugoslavia Allen Bradley Headquarters 1201 South Second Street Milwaukee WI 53204 USA Tel 1 414 382 2000 Fax 1 414 382 4444 Publication 1746 6 8 April 1997 PN 40072 040 01 A Copyright 1997 Allen Bradley Company Inc Printed in USA Looking for more information Artisan Visit us on the web at http www artisan scientific com for more information QUALITY INSTRUMENTATION GUARANTEED Price Quotations Drivers Technical Specifications Manuals and Documentation Artisan Scientific is Your Source for Quality New and Certified Used Pre owned Equipment Tens of Thousands of In Stock Items Fast Shipping and Delivery Eguipment Demos Hundreds of Manufacturers Supported Leasing Monthly Rentals Consignment Service Center Repairs InstraView Remote Inspection Experienced Engineers and Technicians on staff in our Remotely inspect equipment before purchasing with our State of the art Full Service In House Service Center Facility Innovative InstraView website at http www instraview com We buy used equipment We also offer credit for Buy Backs and Trade Ins Sell your excess underutilized and idle used equipment Contact one of our Customer Service Representatives today Talk to a live person 888 88
100. ule in its static shield bag when not in use or during shipment The 1746 NI8 module receives its power through the SLC 500 chassis backplane from the fixed or modular 5V dc 424V dc chassis power supply The 5V dc backplane supply powers the SLC circuitry and the 24V dc backplane supply powers the module analog circuitry The maximum current drawn by the module is shown in the table below 5V dc Amps 24V dc Amps 0 200 0 100 When you are using a modular system configuration add the values shown in the table above to the requirements of all other modules in the SLC chassis to prevent overloading the chassis power supply When using a fixed system controller refer to the Important note about compatibility in a 2 slot expansion chassis on page 3 2 Publication 1746 6 8 April 1997 3 2 Installation and Wiring Module Location in Chassis Modular Chassis Considerations Fixed Controller Compatibility Table Place your 1746 NI8 module in any slot of an SLC 500 modular or m 5V de 24V de modular expansion chassis except for the extreme left slot slot 0 in Amps Amps the first chassis This slot is reserved for the processor or adapter IA4 0 035 modules IA8 0 050 PS 0 085 Important For applications using the upper limit of th
101. update time 4 7 channel status bit 5 13 channel status LED 1 3 2 6 channel status word example 2 7 channel step response 4 7 channel update time definition G 1 chassis definition G 1 installing module in 3 5 installing module in 2 3 CMRR See common mode rejection ratio common mode rejection ratio definition G 1 common mode voltage definition G 1 configuration word 4 3 bit definition chart 5 2 definition G 1 factory default setting 5 1 worksheet B 1 configuring a channel 5 1 worksheet B 1 connection diagram 2 3 3 6 contacting Allen Bradley for assistance P 4 contents of manual P 2 converting from 1746 NIA to 1746 NI8 C 1 current draw 3 1 cut off frequency 4 7 D data type descriptions 5 6 data word 4 4 addressing 4 4 converting to other units 5 6 definition G 2 module input image 2 6 5 5 scaling examples 5 8 values for engineering units 5 5 values for scaled data 5 6 data word format 5 3 examining in status word 5 13 setting in configuration word 5 3 dB definition G 2 decibel See dB default setting of configuration word 5 1 definition of terms G 1 diagnostics at power up 7 1 channel diagnostics 7 1 differential mode rejection See normal mode rejection digital filter definition G 2 DIP switches 1 2 2 2 disabling a channel 5 4 door label 1 2 E electrical noise 3 3 3 9 electrical specifications A 1 electrostatic damage 3
102. y form to another e g mechanical to electrical When a transducer is actuated by signals from one system or medium it can supply a related signal to the other system or medium Publication 1746 6 8 April 1997 Symbols 3 dB frequency See filter frequency A A D converter 1 4 definition G 1 value in data word 5 3 abbreviations G 1 addressing 4 2 1746 NI4 to 1746 NI8 C 2 configuration word 4 3 addressing example 4 4 data word 4 4 addressing example 4 4 status word 4 4 addressing example 4 4 alarms 6 4 aliasing frequency 4 8 Allen Bradley P 4 contacting for assistance P 4 analog input module definition G 1 overview 1 1 attenuation 3 dB frequency 4 7 definition G 1 backplane connector 3 5 data transfer 1 4 definition G 1 electrostatic damage 3 1 ground connection 2 3 3 7 interface 1 3 power supply 3 1 bit allocation 5 1 in status word 5 12 bit definition channel enable 5 4 channel status 5 13 configuration error 5 14 data format 5 3 5 13 filter frequency 5 4 5 13 in configuration word 5 2 Index in status word 5 12 input type 5 3 5 13 open circuit error 5 14 open circuit state 5 3 5 13 over range error 5 14 under range error 5 14 C cable tie slots 1 2 calibration 1 4 channel definition G 1 channel configuration error 7 3 fault detection bit 5 14 channel filter frequency 4 7 effects on noise filtering 4 7 effects on
103. ypes for grounding electrical National Electrical Code Protection quip Association of Boston MA A complete listing of current Allen Bradley documentation including ordering instructions Also indicates whether the Allen Bradley Publication Index D499 documents are available on CD ROM or in multi languages A glossary of industrial automation terms and abbreviations Allen Bradley Industrial Automation Glossary AG 7 1 Publication 1746 6 8 April 1997 P 4 Preface Common Technigues Used in this Manual Allen Bradley Support Publication 1746 6 8 April 1997 The following conventions are used throughout this manual e Bulleted lists such as this one provide information not procedural steps Numbered lists provide sequential steps or hierarchical information e Textin this font indicates words or phrases you should type e Key names appear in bold capital letters within brackets for example ENTER Allen Bradley offers support services worldwide with over 75 Sales Support Offices 512 authorized Distributors and 260 authorized Systems Integrators located throughout the United States alone plus Allen Bradley representatives in every major country in the world Local Product Support Contact your local Allen Bradley representative for e sales and order support product technical training warranty support support service agreements Technical Product Assistance If you need to contact Allen Brad

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