User Manual
AllenBradley
FLEX I/O Analog
Modules
(Cat. No. 1794IE8, OE4,
and IE4XOE2 Series B)
Page 1: ...User Manual Allen Bradley FLEX I O Analog Modules Cat No 1794 IE8 OE4 and IE4XOE2 Series B...
Page 2: ...ate Control available from your local Allen Bradley office describes some important differences between solid state equipment and electromechanical devices which should be taken into consideration whe...
Page 3: ...ut analog module 1794 IE4XOE2 series B 4 in 2 out combo analog module The differences between series A and series B are explained in Appendix B I O Mapping I O mapping for the series B versions of the...
Page 4: ...og Modules Communicate with Programmable Controllers 1 2 Features of your Analog Modules 1 4 Chapter Summary 1 4 How to Install Your Analog Module 2 1 Chapter Objectives 2 1 Before You Install Your An...
Page 5: ...er Summary 3 6 Writing Configuration to and Reading Status from Your Module with a Remote I O Adapter 4 1 Chapter Objectives 4 1 Configuring Your Analog Module 4 1 Range Selection 4 2 Safe State Value...
Page 6: ...1 Adapter Input Status Word 5 2 Mapping Data into the Image Table 5 3 8 Input Analog Module Cat No 1794 IE8 Series B Image Table Mapping 5 3 Analog Input Module 1794 IE8 B Read 5 3 Analog Input Module...
Page 7: ...es A and Series B Analog Modules B 1 Data Table Formats C 1 Two s Complement Binary C 1 Analog Data Format C 2 Scaling Example C 3 Support Services C 1 Technical Support C 1 Engineering and Field Serv...
Page 8: ...title and a brief overview of the topics covered in that chapter Chapter Title Contents 1 Overview of FLEX I O and Analog modules Describes FLEX I O Analog modules features and how they function 2 How...
Page 9: ...e 3 wire Terminal Base 1794 5 2 1794 TBN Terminal Base Unit 1794 5 16 1794 TBNF Fused Terminal Base Unit 1794 5 17 1794 TB3T Temperature Terminal Base Unit 1794 5 41 1794 IB16 24V dc 16 Input Module 1...
Page 10: ...stem for distributed applications that performs all of the functions of rack based I O The FLEX I O system contains the following components shown below Adapter Terminal Base I O Module 20125 I V I V...
Page 11: ...odule s memory to a designated area in the processor data table and output data words from a designated area in the processor data table to the module s memory Block transfer programming also moves co...
Page 12: ...us External devices transmit analog signals to the module 2 The module converts analog signals into binary format and stores these values until the adapter requests their transfer 3 Your ladder progra...
Page 13: ...T RET V OUTPUT 3 I RET RET V Removable Label Input Designators Output Designators Keyswitch Position Indicator 3 1794 IE8 1794 OE4 Keyswitch Position Indicator 4 Module Type Module Type INPUT 0 INPUT...
Page 14: ...as an empty slot in your chassis If the adapter does not recognize your module after installation is completed cycle power to the adapter If this product has the CE mark it is approved for installati...
Page 15: ...his publication as well as the following Allen Bradley publications Industrial Automation Wiring and Grounding Guidelines For Noise Immunity publication 1770 4 1 Guidelines for Handling Lithium Batter...
Page 16: ...dc ATTENTION Do not daisy chain power or ground from an analog terminal base unit to any ac or dc discrete module terminal base unit Note Use this configuration if using any noisy dc discrete I O modu...
Page 17: ...s applied Interruption of the flexbus can result in unintended operation or machine motion 1 Remove the cover plug if used in the male connector of the unit to which you are connecting this terminal b...
Page 18: ...the female flexbus connector C into the adjacent terminal base or adapter female connector to complete the flexbus connections 9 Repeat the above steps to install the next terminal base Panel Wall Mou...
Page 19: ...s and the adapter Important Make certain that the mounting plate is properly grounded to the panel Refer to Industrial Automation Wiring and Grounding Guidelines publication 1770 4 1 4 Hold the adapte...
Page 20: ...ay to the left to connect with the neighboring terminal base adapter You cannot install the module unless the connector is fully extended 3 Make sure that the pins on the bottom of the module are stra...
Page 21: ...mage by sending an erroneous signal to your system s field devices causing unintended machine motion causing an explosion in a hazardous environment Repeated electrical arcing causes excessive wear to...
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Page 26: ...3 5 1 2 287387 2 287387 5 7 5 7 9 287387 5 7 5 7 9 287387 5 7 5 7 9 287387 5 7 5 7 9 OOHQ UDGOH 6WDWXV QGLFDWRU QGLFDWHV SRZHU DSSOLHG WR PRGXOH 2 1387 1387 1387 1387 3 5 9 9 9 9 1 2 20 2 2 OOHQ UDGOH...
Page 27: ...e to the processor s data table The processor user program initiates the request to transfer data from the module to the processor The transferred words contain module status channel status and input...
Page 28: ...rent block transfer control file is required for every module A sample program segment with block transfer instructions is shown in Figure 3 1 and described below Figure 3 1 PLC 3 Family Sample Progra...
Page 29: ...lock transfers Note You must create the data file for the block transfers before you enter the block transfer instructions 2 Figure 3 3 PLC 3 Family Sample Program Structure for a 1794 IE4XOE2 Module...
Page 30: ...sfer write N13 8 15 Power up Bit1 At power up in RUN mode or when the processor is switched from PROG to RUN the user program enables a block transfer read Then it initiates a block transfer write to...
Page 31: ...e block transfers At power up in RUN mode or when the processor is switched from PROG to RUN the user program enables a block transfer read Then it initiates a block transfer write to configure the mo...
Page 32: ...04 03 02 01 00 10 09 08 07 06 05 04 03 02 01 00 S S 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00 11 10 09 08 07 06 05 04 03 02 01 00 0 A D Unipolar Data Analog Value A D Bipolar Data Analog Value D A...
Page 33: ...of data table words that are transferred to the module using a block transfer write instruction The software configurable features available are input output range selection including full range and...
Page 34: ...your output module will maintain in the event of a network communication error When the multiplex control bits M are cleared simultaneously by a communication error or by the user the analog outputs...
Page 35: ...6 Input Data Channel 7 Underrange Configure select Input Size Output Size 0 or 1 Word 1 to 9 Words PU Analog Input Module 1794 IE8 Read Word Dec Bit 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00 Wo...
Page 36: ...analog data 12 bit left justified two s complement number unused lower bits are zero 4 20mA uses all 16 bits Word 5 Bits 15 17 Channel 5 analog data sign bit Word 6 Bits 00 14 00 16 Channel 6 analog...
Page 37: ...1 0 1 0 1 10 to 10V dc 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Off1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 C Configure select bit F Full range bit 1 When configured to off individual channels will return 0000H on S...
Page 38: ...6 15 14 13 12 11 10 07 06 05 04 03 02 01 00 Read Word 0 PU Not used set to 0 W3 W2 W1 W0 Where W Diagnostic bits for current output wire broken or load resistance high Not used on voltage outputs PU P...
Page 39: ...e Channel 3 Where S Sign bit in 2 s complement M Multiplex control C Configure select bit F Full range bit Range Selection Bits for the 1794 OE4 B Analog Output Module Word 5 Channel No Channel 0 Chan...
Page 40: ...full range and configure select bits are preserved at their last setting Bits 04 15 04 17 Not used set to 0 Bits 00 03 Full range bits F for individual channels Bit 00 corresponds to output channel 0...
Page 41: ...2 S Analog Value Input Channel 2 Word 3 S Analog Value Input Channel 3 Word 4 PU Not used set to 0 W1 W0 U3 U2 U1 U0 Where S sign bit in 2 s complement W Diagnostic bits for current output wire broken...
Page 42: ...onds to channel 0 bit 01 corresponds to channel 2 and so on Word 4 Bits 06 14 06 16 Not used Bit 15 17 Power Up bit included in series B modules only This bit is always 0 in series A modules This bit...
Page 43: ...0mA uses all 16 bits Word 1 Bits 15 17 Channel 1 analog data sign bit Word 2 Bits 00 01 Multiplex control bits M for individual channels These bits control the safe state analog outputs Bit 00 corresp...
Page 44: ...justified two s complement number unused lower bits are zero 4 20mA uses all 16 bits Word 6 Bits 15 17 Channel 0 Safe State analog data sign bit Word 7 Bits 00 14 00 16 Channel 1 Safe State analog val...
Page 45: ...3 Output data is received by the adapter in the order of the installed I O modules The Output data for Slot 0 is received first followed by the Output data for Slot 1 and so on up to slot 7 The first...
Page 46: ...odule Fault 3 This bit is set 1 when an error is detected in slot position 3 I O Module Fault 4 This bit is set 1 when an error is detected in slot position 4 5 This bit is set 1 when an error is dete...
Page 47: ...nput Data Channel 1 Input Data Channel 2 Input Data Channel 3 Input Data Channel 4 Input Data Channel 5 Input Data Channel 6 Input Data Channel 7 Underrange Configure select Not used Not used Not used...
Page 48: ...10 03 11 04 12 05 13 06 14 07 15 0 10V dc 0 20mA 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 4 20mA 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 10 to 10V dc 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Off1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0...
Page 49: ...U for individual channels 4 20mA current input only Bit 00 corresponds to input channel 0 bit 01 corresponds to input channel 1 and so on When set 1 indicates either a broken or open input wire or inp...
Page 50: ...13 12 11 10 09 08 07 06 05 04 03 02 01 00 Size Octal Bit 17 16 15 14 13 12 11 10 07 06 05 04 03 02 01 00 Read Words PU Not used set to 0 W3 W2 W1 W0 Read Word 1 Where PU Power up bit included in serie...
Page 51: ...the wire on the output is broken or the load resistance is too high Bit 00 corresponds to channel 0 bit 01 corresponds to channel 2 and so on Read Bits 04 14 Not used set to 0 Read Word 1 Bit 15 Powe...
Page 52: ...rresponds to output channel 1 and so on Refer to range selection above Write Word 6 Bits 04 07 Not used set to 0 Write Word 6 Bits 08 11 Configure select bits C for individual channels Bit 08 correspo...
Page 53: ...nput Size Output Size 0 to 4 Words 0 to 5 Words Read Write OE PU Analog Combo Module 1794 IE4XOE2 B Read Decimal Bit 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00 Size Octal Bit 17 16 15 14 13 12 11...
Page 54: ...05 13 4 20mA 0 1 0 1 0 1 0 1 0 1 0 1 0 10V dc 0 20mA 1 0 1 0 1 0 1 0 1 0 1 0 10 to 10V dc 1 1 1 1 1 1 1 1 1 1 1 1 Off1 0 0 0 0 0 0 0 0 0 0 0 0 C Configure select bit F Full range bit 1 When configure...
Page 55: ...it left justified two s complement number unused lower bits are zero 4 20mA uses all 16 bits Write Word 2 Bits 15 Channel 1 analog data sign bit Write Word 3 Bits 00 01 Output Enable bits Bit 00 corre...
Page 56: ...For example for the 8 input analog module you have 9 input words and 6 output words You can change the I O data size for a module by reducing the number of words mapped into the adapter module as sho...
Page 57: ...50Hz 11 4dB 60Hz 3db 9Hz 20db decade 15 3dB 50Hz 16 8dB 60Hz Step Response to 63 Voltage Terminal Current Terminal 9 4ms 18 2ms Input Impedance Voltage Terminal Current Terminal 100k ohms 238 ohms Inp...
Page 58: ...operating 5 to 80 noncondensing nonoperating 30 g peak acceleration 11 1 ms pulse width 50 g peak acceleration 11 1 ms pulse width Tested 5 g 10 500Hz per IEC 68 2 6 Conductors Wire Size Category 12...
Page 59: ...output until module is configured 10V user configurable 0 10V user configurable Step Response to 63 of FS 24ms Current Load on Voltage Output 3mA maximum Resistive Load on mA Output 15 750 ohms Absol...
Page 60: ...ncondensing operating 5 to 80 noncondensing nonoperating 30 g peak acceleration 11 1 ms pulse width 50 g peak acceleration 11 1 ms pulse width Tested 5 g 10 500Hz per IEC 68 2 6 Conductors Wire Size C...
Page 61: ...18 2ms Input Impedance Voltage Terminal Current Terminal 100k ohms 238 ohms Input Resistance Voltage Terminal Current Terminal 200k ohms 238 ohms Absolute Accuracy1 Voltage Terminal Current Terminal...
Page 62: ...rent 24V dc nominal 19 2 to 31 2V dc includes 5 ac ripple 70mA 24V dc Dimensions Inches Millimeters 1 8H x 3 7W x 2 1D 45 7 x 94 0 x 53 3 Environmental Conditions Operational Temperature Storage Tempe...
Page 63: ...e 0mA output until module is configured 4 20mA user configurable 0 20mA user configurable Output Voltage Terminal 2V output until module is configured 10V user configurable 0 10V user configurable 0V...
Page 64: ...10110 22 To get the negative using the two s complement method you must invert each bit from right to left after the first 1 is detected In the above example 0 10110 22 Its two s complement would be...
Page 65: ...10 Volt Mode 0 10 Volt M d Current mA 4 20mA Mode 0 20mA Mode Voltage V Input Output 0 10 Volt Mode 10 50 8000 8000 0 00 0000 10 00 8620 8618 1 00 0618 9 00 9250 9248 2 00 0C30 8 00 9E80 9E78 3 00 124...
Page 66: ...egrees N30 0 Desired Range Actual Range X Analog Input Data Offset F8 0 32 Scaled Data degrees N30 0 See ladder logic below F8 0 32 COMPUTE DESTINATION EXPRESSION F8 0 968 0001 This rung will scale FL...
Page 67: ...ramming 3 1 block transfer read 4 2 1794 OE4 B 4 6 block transfer write 1794 IE4XOE2 4 10 1794 IE8 B 4 3 1794 OE4 B 4 6 configuration block 4 10 1794 IE8 B 4 4 1794 OE4 B 4 7 input range selection 4 2...
Page 68: ...I O structure 5 1 power defaults 5 12 programming example PLC 3 3 2 PLC 5 3 4 R range selecting 4 2 range selection 1794 IE4XOE2 4 11 5 10 1794 IE8 5 4 1794 OE4 5 7 1794 IE8 B 4 5 1794 OE4 B 4 7 remo...
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