FLEX I/O Frequency Input Module Catalog Numbers 1794-IJ2, 1794-IJ2K, 1794-IJ2XT User Manual
Important User Information Solid state equipment has operational characteristics differing from those of electromechanical equipment. Safety Guidelines for the Application, Installation and Maintenance of Solid State Controls (publication SGI-1.1 available from your local Rockwell Automation sales office or online at http://literature.rockwellautomation.com) describes some important differences between solid state equipment and hard-wired electromechanical devices.
Summary of Changes This manual contains new and updated information. Changes throughout this revision are marked by change bars, as shown to the right of this paragraph. New and Updated Information This table contains the changes made to this revision.
iv Summary of Changes Notes: Publication 1794-6.5.
Table of Contents Summary of Changes New and Updated Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii Preface Who Should Use This Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix Purpose of the Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix About the Vocabulary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix Related Documentation. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
vi Table of Contents Chapter 3 Configure Your FLEX I/O Module with RSLogix 5000 Software Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 Add and Configure the FLEX I/O Module. . . . . . . . . . . . . . . . . . . . . 29 Chapter Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Chapter 4 Troubleshoot the Module Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Preface Read this preface to familiarize yourself with the rest of the manual. It provides information concerning: • • • • • who should use this manual the purpose of this manual related documentation conventions used in this manual terminology used in this manual Who Should Use This Manual We assume that you have previously used an Allen-Bradley programmable controller, that you are familiar with its features, and that you are familiar with the terminology we use.
x Preface Related Documentation The following documents contain additional information concerning Rockwell Automation products. To obtain a copy, contact your local Rockwell Automation office or distributor. Resource Description FLEX I/O Product Profile, publication 1794-PP019 xxxxx Comprehensive product profile for the FLEX I/O product line. FLEX I/O ControlNet Redundant Media Adapter, publication 1794-5.
Preface Resource xi Description FLEX I/O 4 Isolated Input Module Installation Instructions, Information on how to install the FLEX I/O 4 Isolated Input Module publication 1794-IN038 x xxxxxxxxxxxxx (Catalog No. 1794-IF4I). FLEX I/O 2 In/2 Out Isolated Analog Combo Module Installation Instructions, publication 1794-IN039 x xxxxxxxxxxxxx Information on how to install the FLEX I/O 2 In/2 Out Isolated Analog Combo Module (Catalog No. 1794-IF2XOF2I).
xii Preface Resource Description FLEX I/O DC Power Supply Installation Instructions, publication 1794-IN069 x xxxxxxxxxxxxx Information on how to install the FLEX I/O DC Power Supply (Catalog No. 1794-PS13, 1794-PS3). Industrial Automation Wiring and Grounding Guidelines, publication 1770-4.1 x xxxxxxxxxxxxx In-depth information on grounding and wiring Allen-Bradley programmable controllers. Rockwell Automation Industrial Automation Glossary, AG-7.
Chapter 1 Overview of the Frequency Input Module This chapter provides a description of the application and capabilities of the 1794 FLEX I/O Frequency Input module. It also explains the general algorithm for calculating frequency.
2 Overview of the Frequency Input Module • I/O module – contains the bus interface and circuitry needed to perform specific functions related to your application The 1794 FLEX system consists of an adapter module, terminal base unit, DIN rail, power supply, and adapter cabling components. You can use up to 8 terminal bases per adapter module. For detailed instructions to set up and install your module, refer to the topic, Install Your FLEX I/O Frequency Input Module, on page 13.
Overview of the Frequency Input Module 3 The primary use of the module is accurate, high-speed frequency measurement. A high-speed internal clock is synchronized with the frequency input to count over a user-selected sampling time or a user-defined number of frequency input pulses. All power for input devices (4 devices, 24 V DC @ 15 mA max) is supplied by the I/O module.
4 Overview of the Frequency Input Module Typical Communication between a FLEX I/O Module and an Adapter 1794-ACN15 1794-ACNR15 1794-ACNR15K 1794-ADN 1794-AENT 1794-APBDPV1 1794-ASB 1794-APB Adapter 1794-AENT shown 2 External devices transmit frequency signals to the module. 1 The adapter transfers your configuration data to the module using a BTW. FlexBus 1794-IJ2 FREQUENCY INPUT 2 CHANNEL 4 Your ladder program instructs the adapter to perform a BTR of the values and stores them in a data table.
Overview of the Frequency Input Module 5 A broader view of how the FLEX I/O module interfaces with the different elements in a Logix system is shown in the sample illustration below. PC running controller and Rockwell Automation configuration software PanelView Station FLEX System 1794 Adapter 1794 FLEX I/O module Bridge Ethernet 45567 In this example, the FLEX I/O module communicates with the controller through the adapter. The controller can produce and consume tags.
6 Overview of the Frequency Input Module The frequency module has 2 input channels (mode dependent). Each of the 2 input channels may accept these input signals: Input Capabilities • magnetic pickup – 500 mV…28V AC peak (optional 50 mV…28V AC peak for increased signal sensitivity) • proximity probe inputs – compatible with Bently Nevada 3300 – 5 mm (0.197 in.) and 8 mm (0.315 in.
Overview of the Frequency Input Module 7 Selecting the Modes of Operation You configure the frequency input module for these modes of operation: Modes of Operation Mode Use this mode to Frequency and % Full Scale •Monitor the frequency of an input with high accuracy (for example, shaft) Indicators / Alarms Scaler / Values •Monitor the percentage of full scale frequency •Operate frequency alarm (% full scale) x •Scale the frequency •Monitor the direction of shaft rotation x •Wire-off alarm with D
8 Overview of the Frequency Input Module processor to do other tasks and helps increase the overall throughput of your controller system. Application Features Feature Mode Purpose Alarm is ON when Frequency alarm Frequency alarm selected Activate alarm when calculated or scaled frequency is higher than user-specified frequency value.
Overview of the Frequency Input Module 9 Normal Mode Frequency Determination, at Least Two Pulses in Sampling Time Missing pulse alarm would be reported after 2 s, if no pulse occurs Frequency reported at end sampling time = Pulses counted T2 - T1 Minimum sampling time pulses counted Frequency input pulses First pulse in window, T1 time stored T2, update as each pulse occurs Last pulse in window 45340 If only one pulse occurs within the sampling window, when the sample time has expired, the window
10 Overview of the Frequency Input Module Termination on Number of Pulses The normal mode is designed to provide wide bandwidth. However, it requires the full 2 seconds to report a missing pulse. Another user parameter, Number of Pulses to Terminate Sampling, is provided for scenarios where many pulses are expected within the sampling window, such that early determination of frequency is possible.
Overview of the Frequency Input Module Frequency reported at = first pulse in extended time Missing pulse multiplier 11 2-1 T2 - T1 Missing pulse alarm would be reported after last window, if no pulse occurs Extended windows added one at time, until pulse occurs or multiplied windows exceeded Minimum sampling time 2 = pulses counted Possible extended window Frequency input pulses First pulse in window, T1 time stored First pulse in an extended window, T2 time stored 45343 Direction Detection Dir
12 Overview of the Frequency Input Module Direction Detection – Principle of Operation Clockwise rotation 2xM Sensor 0 M Sensor 1 Gate input Frequency input IJ2 module Sensor 0 (F) Sensor 1 (G) Sensor 0 (F) Clockwise Rotation Counter Clockwise Sensor 1 (G) Rotation 45344 Chapter Summary Publication 1794-6.5.11 - September 2011 In this chapter, you learned about the frequency input module, block transfer communication, and details of how the module functions.
Chapter 2 Install Your FLEX I/O Frequency Input Module Overview Before You Install Your Module This chapter provides you with pre-installation requirements and instructions on how to install your FLEX I/O Frequency Input modules.
14 Install Your FLEX I/O Frequency Input Module ATTENTION Total current draw through the terminal base unit is limited to 10 A. Separate power connections may be necessary. The frequency input module requires 30 mA at 5V DC from the FlexBus backplane. Methods of wiring the terminal base units are shown in the illustration below. ATTENTION Install the Module Do not daisychain power or ground from the terminal base unit to any AC or DC digital module terminal base unit.
Install Your FLEX I/O Frequency Input Module 15 2. Check to make sure that the 16 pins in the male connector on the adjacent device are straight and in line so that the mating female connector on this terminal base unit will mate correctly. 9 0 1 8 2 7 7 3 6 4 22 ++ 45319 Make certain that the female FlexBus connector is fully retracted into the base unit. 3. Position the terminal base at a slight angle and hooked over the top of the 35 x 7.
16 Install Your FLEX I/O Frequency Input Module 6. Press down on the terminal base unit to lock the terminal base on the DIN rail. If the terminal base does not lock into place, use a screwdriver or similar device to open the locking tab, press down on the terminal base until flush with the DIN rail and release the locking tab to lock the base in place. 22 ++ 45321 Gently push the FlexBus connector into the side of the adapter, or proceeding terminal base to complete the backplane connection.
Install Your FLEX I/O Frequency Input Module 17 • installing the terminal base units and securing them to the wall or panel. Use the mounting kit Cat. No. 1794-NM1 for panel or wall mounting. 1794-NM1 Mounting Kit 35.5 (1.4) Millimeters (inches) 1 2 0 1 9 8 4 7 2 3 7 6 4 22 ++ 3 45323 Description Description 1 Mounting plate for adapter 3 Terminal base unit (not included) 2 #6 Self-tapping screws 4 Adapter module (not included) To install the mounting plate on a wall or panel: 1.
18 Install Your FLEX I/O Frequency Input Module 2. Drill the necessary holes for the #6 self-tapping mounting screws. 3. Mount the mounting plate for the adapter module using two #6 self-tapping screws – 18 screws are included for mounting up to 8 modules 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.
Install Your FLEX I/O Frequency Input Module 19 2 3 1 4 5 6 7 8 40231 Label here or under here Description Description 1 FlexBus connector 5 Base unit 2 Latching mechanism 6 Alignment groove 3 Keyswitch 7 Alignment bar 4 Cap plug 8 Module 2. Make certain the FlexBus connector (1) is pushed all the way to the left to connect with the neighboring terminal base or adapter. You cannot install the module unless the connector is fully extended. 3.
20 Install Your FLEX I/O Frequency Input Module IMPORTANT The adapter is capable of addressing eight modules. Do not exceed a maximum of eight terminal base units in your system. This section provides essential wiring information for the 1794-TB3G, 1794-TB3GK, and 1794-TB3GS terminal base units. It also includes instructions for connecting wiring to the FLEX I/O module.
Install Your FLEX I/O Frequency Input Module ATTENTION 21 Take note of the following considerations when wiring your terminal base units: •AIl modules must be frequency or analog modules for the daisychain configuration. •Use the individual type of configuration for any "noisy" DC digital I/O modules in your system. •All modules powered by the same power supply must be frequency or analog modules for the combination type of configuration.
22 Install Your FLEX I/O Frequency Input Module Connecting Wiring Using a 1794-TB3G, 1794-TB3GK or 1794-TB3GS Terminal Base Unit 1. Connect individual signal wiring to numbered terminals on the 0…15 row (A) and 17…32 row (B) on the terminal base unit as indicated in the table below. 2. Connect output signal and supply wiring to the numbered terminals on rows B and C, as shown in the figure, 1794-TB3G, 1794-TB3GK and 1794-TB3GS Wiring Connections, on page 21. 3.
Install Your FLEX I/O Frequency Input Module 23 Wiring Connections for the Frequency Input Module Channel 0 Terminals(5) Channel 1 Terminals(5) Types of Inputs Power Input RET(7) Power Input RET(7) 24V DC IEC1+ Proximity(1) (2) 7 6 3 8 9 12 24V DC Contact Switch(3) 7 6 3 8 9 12 500mV AC Magnetic Pickup 7(6) 5 3 8 10 12 50mV AC Magnetic Pickup(4) 7 5 3 8 10 12 6V AC Vortex 2 1 3 13 14 12 3V AC Vortex 2 0 3 13 15 12 24V DC IEC1+ Proximity(1) (2) 24 23 20 25
24 Install Your FLEX I/O Frequency Input Module Connections for Terminal Base 1794-TB3G shown 16 0 1 3V 6V 17 18 2 19 +V COM 24V DC Supply In 5 6 20 21 22 23 50 500/50 G mV mV Sel Channel 0 Gate Input RET Chassis Gnd 35 4 24V RET 50 500/50 F Pwr mV mV Sel Channel 0 Frequency Input Out 0 Out 0 Ret 34 3 36 37 Sply 0 Gnd 38 39 40 Sply 0 Ret 41 7 8 24V Pwr 24V Pwr 24 25 9 10 11 12 13 15 F 500/50 50 RET 24V 6V 3V Pwr mV mV Sel Channel 1 Frequency Input 26 27 28 2
Install Your FLEX I/O Frequency Input Module 25 Resolution % is defined as: % Resolution = 100 Count frequency x minimum frequency sample time Accuracy % is defined as: % Accuracy = 100 Minimum frequency sample time 2 Minimum 1frequency sample + 1 time count frequency Resolution and Accuracy Accuracy Minimum Sampling Time Frequency Accuracy Base Accuracy Sample Time (ms) Worst Case Total Accuracy Deviation in Hz Due to Total Accuracy Resolution 1.0…3276.
26 Install Your FLEX I/O Frequency Input Module Input Map Bit 15 14 Word Read 5 Reserved 6 Reserved Where: 13 12 11 10 09 08 07 Diagnostic Status Channel 0 06 05 04 Reserved 03 02 01 00 Diagnostic Status Channel 1 R = Reserved GS = Gate state F/A = Frequency/Acceleration alarm WO = Wire-off alarm MPA = Missing pulse alarm Output Map Dec 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00 Oct 17 16 15 14 13 12 11 10 07 06 05 04 03 02 01 00 0 CF SS
Install Your FLEX I/O Frequency Input Module 27 Examples of Wiring to a 1794-TB3G Terminal Base Unit Standard Magnetic Pickup 500 mV threshold (F0) 0 1 2 3 4 5 6 7 8 Standard Magnetic Pickup 50 mV threshold (F0) 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 Magnetic + Input Device - 5 10 3 12 40 41 Important: When using a channel for 50 mV sensor, jumper the 50/500 mV pin to the appropriate RET.
28 Install Your FLEX I/O Frequency Input Module Notes: Publication 1794-6.5.
Chapter 3 Configure Your FLEX I/O Module with RSLogix 5000 Software Overview This chapter describes how to configure the 1794-IJ2 module for the ControlLogix and CompactLogix system. The module can communicate through different networks such as ControlNet, Ethernet, Profibus, among others. In the examples below, the Ethernet adapter is used for communication between the Logix processor and the FLEX I/O bus.
30 Configure Your FLEX I/O Module with RSLogix 5000 Software 1. Select New Module for the I/O Configuration. Right-click the local communication module. Select New Module. 2. The Select Module dialog appears. Select the FLEX I/O module from the Specialty module type. Click OK 3. The New Module dialog appears. Publication 1794-6.5.
Configure Your FLEX I/O Module with RSLogix 5000 Software 31 Complete the following fields and click OK. • • • • Name Description Comm Format Electronic Keying 4. On the Connection tab, specify a value for the Requested Packet Interval(RPI). 5. On the Fault Action tab, specify the following: • Fault Mode • Communication Fault Behavior Publication 1794-6.5.
32 Configure Your FLEX I/O Module with RSLogix 5000 Software 6. On the Configuration tab, specify the following: • Channel • Frequency or Acceleration If you choose Frequency, go to step 8. Go to step 9 if you choose Acceleration. 7. • • • For Frequency mode, specify the following: Maximum Frequency Frequency Range Minimum Frequency Sample Time 8. • • • • For Acceleration mode, specify the following: Maximum Frequency Frequency Range Minimum Frequency Sample Time Acceleration Calculation Time 9.
Configure Your FLEX I/O Module with RSLogix 5000 Software 33 Configuration Parameters Module Property Configuration Options Maximum Frequency 0 Hz (default) Frequency Range 1…32767 1.0…3276.
34 Configure Your FLEX I/O Module with RSLogix 5000 Software Notes: Publication 1794-6.5.
Chapter 4 Read and Write Configuration Maps for the FLEX I/O Module Overview Configure Your Frequency Input Module This chapter describes how to configure, read data from, and map data to your Frequency Input module.
36 Read and Write Configuration Maps for the FLEX I/O Module Map Data for the Module The following read and write words and bit/word descriptions describe the information written to and read from the frequency input module. The module uses up to 6 words of input data and up to 7 words of output data. Each word is composed of 16 bits. Frequency Input Module Image Table Mapping Module Image Frequency Channel 0 I/O Image % Full Scale or Acceleration Channel 0 Input size Frequency Channel 1 1...
Read and Write Configuration Maps for the FLEX I/O Module 37 Block Transfer Read Word Assignments (Octal Bit) 17 16 15 14 13 12 11 10 07 06 05 04 03 02 01 00 Decimal Bit 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00 4 R R Direction Ch 0 MPA Ch 0 R R Direction Ch 1 GS Ch 1 F/A Ch 1 WO Ch 1 MPA Ch 1 5 Reserved Where: R = Reserved GS = Gate state F/A = Frequency/Acceleration alarm WO = Wire-off alarm MPA = Missing pulse alarm GS F/A WO Ch 0 Ch 0 Ch 0 Diagn
38 Read and Write Configuration Maps for the FLEX I/O Module Bit/Word Definitions for Block Transfer Read Words Word Bit Definition Word 4 Bits 00 Missing Pulse Alarm (channel 1) – Indicates that no Frequency input pulse has occurred within the period determined by the Minimum Frequency Sampling Time and the Missing Pulse Multiplier. Primary control is given to the Missing Pulse Multiplier to determine when this bit is set.
Read and Write Configuration Maps for the FLEX I/O Module 39 Bit/Word Definitions for Block Transfer Read Words Word Bit Definition Word 5 Bits 00…03 Diagnostic Status – indicates the response from the module; a normal or non-normal operating condition. Bit 03 02 01 00 0 0 0 0 0 = Normal Operation (No Failure) 0 0 0 1 1 = Calibration Failure 0 0 1 0 2 = Configuration Failure A Minimum Frequency Sample Time value other than 0…9 was selected.
40 Read and Write Configuration Maps for the FLEX I/O Module Block Transfer Write Word Assignments (Octal Bit) 17 16 15 14 13 12 11 10 07 06 05 04 03 02 01 00 Dec.
Read and Write Configuration Maps for the FLEX I/O Module 41 Bit/Word Definitions for the Block Transfer Write Words Word Bit Definition Word 0 (con’t.) Bits 05 Frequency range bits (channel 1) – Specifies the Frequency Range of the Frequency input. 0 = 1…32767 (below 1 Hz reports 0); 1 = 1.0…3276.7 (below 1.0 Hz reports 0.0). Default = 0 Bits 06 Local fault mode selection – determines how the Module Safe State data is used to control alarm outputs for bus communication and internal module faults.
42 Read and Write Configuration Maps for the FLEX I/O Module Bit/Word Definitions for the Block Transfer Write Words Word Bit Definition Bit 13 (15) Frequency range bits (channel 0) – Specifies the Frequency Range of the Frequency input. 0 = 1…32767 (below 1 Hz reports 0); 1 = 1.0…3276.7 (below 1.0 Hz reports 0.0).
Read and Write Configuration Maps for the FLEX I/O Module 43 Bit/Word Definitions for the Block Transfer Write Words Word Bit Definition Word 3 Bits 00…01 Wire-Off/Missing Pulse fault select mode (channel 0) – Sets the mode for 24V DC IEC 1+ Wire Off Input Detection and Missing Pulse Detection result for any input (Frequency or Gate). The Maximum Frequency is determined by Frequency Range bit and the Maximum Frequency value, and the Minimum Frequency is determined by Frequency Range bit.
44 Read and Write Configuration Maps for the FLEX I/O Module Bit/Word Definitions for the Block Transfer Write Words Word Bit Definition Word 3 Bit 07 Minimum Frequency Sampling Time (channel 0) – Specifies the minimum time (in ms) the module spends collecting pulses to determine the Frequency.
Read and Write Configuration Maps for the FLEX I/O Module 45 Bit/Word Definitions for the Block Transfer Write Words Word Bit Definition Word 4 Bits 00…15 (00…17) Maximum frequency or absolute value acceleration/deceleration (channel 1) – Specifies the highest Frequency or absolute Acceleration/Deceleration value allowed on the Frequency input. 0…32,767 Hz, 0.0…3,276.7 Hz. or 0…32,767 Hz/s depending on the Frequency Range and Frequency/Acceleration Alarm Select bits.
46 Read and Write Configuration Maps for the FLEX I/O Module Bit/Word Definitions for the Block Transfer Write Words Word Bit Definition Word 6 Bits 00…01 Wire-Off/Missing Pulse fault select (channel 1) – Sets the mode for 24V DC IEC 1+ Wire Off Input Detection and Missing Pulse Detection result for any input (Frequency or Gate). The Maximum Frequency is determined by Frequency Range bit and the Maximum Frequency value, and the Minimum Frequency is determined by Frequency Range bit.
Read and Write Configuration Maps for the FLEX I/O Module 47 Bit/Word Definitions for the Block Transfer Write Words Word Bit Definition Word 6 Bit 07 Initiate Startup Select (channel 1) – Alerts a channel that if process startup is in progress to defeat the missing pulse alarm for a time determined by the missing pulse delay multiplier.
48 Read and Write Configuration Maps for the FLEX I/O Module Bit/Word Definitions for the Block Transfer Write Words Word Bit Definition Word 6 Bit 13 (15) Invert Select – Gate Input (channel 1) – Selects whether to invert the Gate input signal, if not using an Active High (24V = On) 24V DC IEC 1+ sensor or “Normally Open” relay or switch contact on the 24V DC Gate Input terminal.
Read and Write Configuration Maps for the FLEX I/O Module 49 Output Map Dec 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00 Oct 17 16 15 14 13 12 11 10 07 06 05 04 03 02 01 00 0 CF SSM FR Ch0 Number of pulses to terminate sampling 0…7 Ch 0 R LF FR Ch 1 Number of pulses to terminate sampling 0…7 Ch 1 1 Maximum Frequency 0…32.767 or 0.0…3,276.
50 Read and Write Configuration Maps for the FLEX I/O Module Notes: Publication 1794-6.5.
Chapter 5 Troubleshoot the Module Overview Status Indicators This chapter provides a description of the different status indicators for the frequency input module to help you troubleshoot.
36 Troubleshoot the Module When an output indicator is yellow, the logic is driving an output alarm On. After detecting a fault, the internal circuitry sets the output data to the appropriate safe state, as defined by the module data table. Safe state control may be adapter-dependent. The input and output indicators are on the field side of the isolation path, and display the logic state of the actual microcontroller input and output.
Troubleshoot the Module 37 Diagnostic Bits in Word 5 of the BTR File 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00 word 5 See table, Diagnostic Bits in Word 5, for diagnostics 45375 Diagnostic Bits in Word 5 Word 5 Bits 00…03 Diagnostic Status – indicates the response from the module; a normal or non-normal operating condition.
38 Troubleshoot the Module Notes: Publication 1794-6.5.
Appendix A Specifications What This Appendix Contains This appendix contains the frequency accuracy and general specifications of the Frequency Input module (1794-IJ2, 1794-IJ2K, and 1794-IJ2XT). Input Specifications Attribute Value Number of input channels 2 Number of inputs per channel 2 – Frequency and Gate (gate used to establish direction) Input frequency, max 32 kHz Frequency value, max 32,767 Hz or 3,276.
56 Specifications Output Specifications(1) Attribute Value Number of outputs 2 – isolated Output voltage source Customer supplied Output voltage min nom max 10V DC 24V DC 31.2V DC On-state current, min 1 mA per output On-state current, max 1.0 A per channel sourced out of module Current Limited – All outputs can be On simultaneously without derating Surge current 2 A for 50 ms, repeatable every 2 s Off-state leakage, max Less than 300 μA @ 31.2V DC On-state voltage drop 0.
Specifications 57 General Specifications Attribute Value Power dissipation, max 4.6W @ 31.2V DC Thermal dissipation, max 15.6 BTU/hr @ 31.
58 Specifications Environmental Specifications Attribute Value ESD immunity IEC 61000-4-2: 4 kV contact discharges – 1794-IJ2 and 1794-IJ2K 6 kV contact discharges – 1794-IJ2XT 8 kV air discharges EFT/B immunity IEC 61000-4-4: ±2 kV @ 5 kHz on power ports ±2 kV @ 5 kHz on shielded signal ports Surge transient immunity IEC 61000-4-5: ±2 kV line-earth(CM) on shielded signal ports Conducted RF immunity IEC 61000-4-6: 10V rms with 1 kHz sine-wave 80% AM from 150 kHz…80 MHz on shielded signal ports C
Appendix B Electronic Data Sheet (EDS) Files Overview EDS provides the definition for a device's configurable parameters and public interfaces to those parameters: • Every type of configurable device has its own unique EDS. • EDS is a simple text file that allows product-specific information to be made available to third-party vendors. This makes updating of configuration tools easier without having to constantly revise the configuration software tool.
60 Electronic Data Sheet (EDS) Files To acquire EDS files for Rockwell Automation and Allen-Bradley devices, go to Tools & Resources EDS Files at www.ab.com/networks/eds. It allows you to search for devices by the type of network and their catalog number. ATTENTION •Make sure to match the major firmware revision of the device as each major firmware revision is associated with a specific EDS file.
Appendix C Schematics What This Appendix Contains Use this appendix to understand the internal logic of the FLEX I/O Frequency Input module. Follow the wiring practices described in Industrial Automation Wiring and Grounding Guidelines for Noise Immunity, publication 1770-4.1, when wiring your I/O devices.
62 Schematics (F and G, 15 mA each) Isolated 24V power 24V 2.5 KW IEC 1+ or 24V DC Switch input 5.11 KW 2.15 KW 50/500 mV Input 215 W 2.15 KW 100pF Frequency only, not on gate 8.25 KW 6V Vortex input 3V Vortex input 10 KW + Frequency lead break 100 pF (Gate lead break) 100 KW 47 pF 100 pF 8.25 KW Lead breakage Reference voltage 46.4 KW - 100 pF + 10 KW Ex Nor 100 pF Frequency input (Gate input) Internal 500 mV Ref.
Schematics 63 . Output channel Supply 10 KW D5 6.8V 10-31.2V Q1 Output TEMPFET s DC Alarm 3.83 KW Output 0 D6 Rload 1A max 3.83 KW RT1 Supply return 45355 Customer supplied power, ranging from 10V…31.2V DC, is connected internally to the power output transistor. When an output is turned on, current flows into the source, out of the drain, through the load connected to the ground of the customer supply (customer return).
64 Schematics Notes: Publication 1794-6.5.
Appendix D Program Your Module with PLC Processors Overview This Appendix serves as a reference to users of the PLC-* Family Processors to program their modules. To initiate communication between the frequency input module and your PLC processor, you must enter block transfer instructions into your ladder logic program. Use this chapter to enter the necessary block transfer instructions into your ladder logic program.
66 Program Your Module with PLC Processors PLC-2 Family Processor The 1794 Frequency I/O module is not recommended for use with PLC-2 family programmable controllers due to the number of digits needed for high resolution. IMPORTANT The frequency input module functions with reduced performance in PLC-2 systems.
Program Your Module with PLC Processors PLC-3 Processor Program Example 67 Rung M:0 The IJ2 module is located in rack 3, I/O group 2, slot 0. The control file is a 10 word file starting at B17:0 that is shared by the BTR/BTW. The data obtained by the PLC3 processor is placed in memory starting at location N18:101, and with the default length of 0, is 7 words long.
68 Program Your Module with PLC Processors Rung 2:0 The IJ2 module is located in rack 1, I/O group 2, slot 0. The integer control file starts at N22:200, is 5 words long and is compatible with all PLC-5 family members. The data obtained by the PLC-5 processor from the IJ2 module is placed in memory starting at N22:101, and with the default length of 0, is 7 words long. The length 1 can be any number between 0 and 7. In enhanced PLC-5 processors, the block transfer data type may be used as a control file.
Program Your Module with PLC Processors PLC-5/250 Processor Program Example Rung 1STEPO:1 The IJ2 module is located in rack 14, I/O group 1, slot 0. The data obtained by the PLC-5/250 processor from the IJ2 module is placed in the data table starting at 2BTD5:101, and with the default length of 0, is 7 words long. The length can be any number between 0 and 7.
70 Program Your Module with PLC Processors Notes: Publication 1794-6.5.
Index Numerics 1756-ENBT 29 1794-ACN15 4 1794-ACNR1 4 1794-ACNR15K 4 1794-ADN 4 1794-AENT 4 1794-APB 4 1794-APBDPV1 4 1794-ASB 4 1794-IJ2 application 7 capabilities 7 features 8 installation 13 mode 7 operation 8 output capabilities 7 power requirements 13 wiring 21 1794-IJ2K 2 1794-IJ2XT 2 1794-TB3G 18, 20, 21, 22 1794-TB3GK 20, 21 1794-TB3GS 18, 20, 21, 22 A acceleration absolute value 39 alarm 43, 46 calculation 33, 40, 43, 46 accuracy 7, 24, 25 adapter 1, 3, 5, 15, 16, 17, 18, 22, 52 capabilities 20 da
72 Index calibration failure 39, 53 chassis 13, 21, 22 combination type 21 communication 3, 4, 40, 41, 63, 69 CompactLogix 29 configuration alarms 35 block transfer write 35 failure 39, 53 fault action 32 fault modes 35 individual 21 module properties 33 number of pulses 35 connector female 15 FlexBus 16, 16, 19 male 15 contact switch 23 controller 3, 5, 7, 29, 64, 70 ControlLogix 29 ControlNet 29 current draw 14, 20, 23 total 20 D daisychain 14, 21, 22 data map 35 data table 35 data transfer 3 decelerat
Index minimum 46 minimum sample time 32, 33, 41, 47 overange 39 parameters 8 percentage full scale 7 range 32, 33, 35 range bit setting 24 scale 7 zero 9 G gate input low to high transition 11 gate state 26 GND connection 24 H hardware failure 53 major failure 39, 53 hazardous location 19 73 types 23 usage 3 wire-off detection 46 write words 36 installation 14, 15 drilling dimension 16, 17 hazardous location 19 instructions 13 module position 13 mounting kit 17 requirements 13 terminal base 14, 18 wall
74 Index MSG instructions 5 O oil and gas 5 operation mode 7 non-normal 39 normal 39, 53 unintended 14 output 52 alarm 52 connections 24 current 7 data 36 fused 7 indicator 51, 52 isolated 7 supply 24 output map acceleration calculation 26, 49 communication fault 26, 49 frequency range 26, 49 invert frequency input 26, 49 invert gate input 26, 49 local fault mode 26, 49 missing pulse multiplier 26, 49 safe state mode 26, 49 wire-off fault frequency 26, 49 wire-off fault gate 26, 49 wire-off fault mode 26
Index indicator 52 T tags 5 terminal base 1, 13, 14, 15, 17, 19 grounding 22 installation 14 mount 14 replace 14 wiring 14, 21 wiring methods 14 75 throughput 8 troubleshoot 51 turbine metering 5 V vortex flowmeter 6 W wire off 33, 44, 26 wiring 1794-TB3G, 1794-TB3GS, 1794-TB3GK 21 frequency module 21 illustration 14, 20 methods 14 onnecting 22 terminal base 21 word definition 37, 40 write word 39, 35, 40 Z zero frequency 9 Publication 1794-6.5.
76 Index Notes: Publication 1794-6.5.
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