Rockwell Automation Allen-Bradley ControlLogix 1756-HSC User Manual
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Rockwell Automation Allen-Bradley ControlLogix 1756-HSC User Manual

High speed counter module
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Summary of Contents for Rockwell Automation Allen-Bradley ControlLogix 1756-HSC

  • Page 1 ControlLogix High Speed Counter M odule 1756-HSC User M anual...
  • Page 2 Reproduction of the contents of this copyrighted publication, in whole or part, without written permission of Rockwell Automation, is prohibited. Throughout this manual we use notes to make you aware of safety...
  • Page 3 European Communities (EC) If this product has the CE mark it is approved for installation within the European Union and EEA regions. It has been designed and Directive Compliance tested to meet the following directives. EM C Directive This product is tested to meet the Council Directive 89/336/EC Electromagnetic Compatibility (EMC) by applying the following standards, in whole or in part, documented in a technical construction file:...
  • Page 4 512 authorized distributors and 260 authorized Support systems integrators located throughout the United States alone, as well as Rockwell Automation representatives in every major country in the world. Local Product Support Contact your local Rockwell Automation representative for: •...
  • Page 5 Summary of Changes Introduction This release of this document contains new information. New Information New information is marked by Change Bars in the side column, as shown to the left. lists sections that contain new information. Section: Changes Chapter 3 Additional information about module features Chapter 4 Updated w iring diagram for connection to an...
  • Page 6 Summary of Changes Notes: Publication 1756-UM 007A-EN-P - October 2000...
  • Page 7 Preface W hat This Preface Contains This preface describes how to use this manual. The following table describes what this preface contains and its location. For information about: See page: Who Should Use This Manual Preface- 1 Purpose of This Manual Preface- 1 Related Terms Preface- 2...
  • Page 8 Preface Related Terms This manual uses the following terms: This term: Means: Broadcast Data transmissions to all addresses Communications Format that defines the type of information transferred between an format I/O module and its owner controller. This format also defines the tags created for each I/O module Compatible match An electronic keying protection mode that requires the physical module and the module configured in the software to match...
  • Page 9 Preface Owner controller The controller that creates and stores the primary configuration and communication connection to a module Producer/consum Intelligent data exchange system devices in which the HSC module produces data without having been polled first Program mode In this mode, the controller program is not executing. Inputs are actively producing data.
  • Page 10 Preface Notes: Publication 1756-UM 007A-EN-P - October 2000...

  • Page 11: Table Of Contents

    Table of Contents Chapter 1 W hat is the ControlLogix What This Chapter Contains ..... . . 1-1 What is the ControlLogix High Speed Counter Module? . . . 1-1 High Speed Counter M odule? Purpose of the HSC Module .
  • Page 12 Table of Contents Operation in Rate Measurement Mode ....3-12 Sample Period ....... 3-13 Connection to Channel Inputs .
  • Page 13 Table of Contents Accessing the Tags ......5-17 Changing Configuration Information at the Tags..5-18 Configurable Features .
  • Page 14 Table of Contents Publication 1756-UM 007A-EN-P - October 2000...

  • Page 15: What This Chapter Contains

    Chapter What is the ControlLogix High Speed Counter M odule? W hat This Chapter Contains This chapter describes the ControlLogix HSC module and what you must know and do before you begin to use it. For information about: See page: What is the ControlLogix High Speed Counter Module? Using An High Speed Counter M odule in the...

  • Page 16: Purpose Of The Hsc Module

    What is the ControlLogix High Speed Counter M odule? High speed inputs, as found on the HSC module, may be sensitive to electromagnetic noise. The module contains opto-isolators that minimize the effects of noise, but you should provide grounding methods that keep noise spikes under 2000V for backplane (ControlBus) protection and under 1000V for channel-to-channel protection.

  • Page 17: Using An High Speed Counter Module In The Controllogix System

    What is the ControlLogix High Speed Counter M odule? Using An High Speed An HSC module performs high speed counting for industrial applications. The module interfaces with a ControlLogix Logix5550 Counter M odule in the controller to report the number of counts at each frequency. ControlLogix System A ControlLogix HSC module mounts in a ControlLogix chassis and uses a Removable Terminal Block (RTB) to connect all field-side...

  • Page 18: Preventing Electrostatic Discharge

    What is the ControlLogix High Speed Counter M odule? Contr olBus connector - The backplane interface for the ControlLogix system connects the module to the ControlBus backplane. Connectors pins - Input/output, power and grounding connections are made to the module through these pins with the use of an RTB. Locking tab - The locking tab anchors the RTB on the module, maintaining wiring connections.

  • Page 19: Removal And Insertion Under Power

    What is the ControlLogix High Speed Counter M odule? Removal and Insertion These modules are designed to be installed or removed while chassis power is applied. Under Pow er When you insert or remove a module while ATTEN TION backplane power is applied, an electrical arc may occur.
  • Page 20 What is the ControlLogix High Speed Counter M odule? Notes: Publication 1756-UM 007A-EN-P - October 2000...

  • Page 21: What This Chapter Contains

    Chapter High Speed Counter Operation Within the ControlLogix System W hat This Chapter Contains This chapter describes how the HSC module works within the ControlLogix system. For information about: See page: Ownership and Connections Using RSNetWorx and RSLogix 5000 Direct Connections High Speed Counter Module Operation High Speed Counter Modules in a Local Chassis...

  • Page 22: Using Rsnetworx And Rslogix 5000

    High Speed Counter Operation Within the ControlLogix System Using RSNetWorx and When an HSC module is created, the I/O configuration portion of RSLogix5000 generates configuration data structures and tags for that RSLogix 5000 HSC module, whether the module is located in a local or remote chassis.

  • Page 23: Direct Connections

    High Speed Counter Operation W ithin the ControlLogix System Direct Connections A dir ect connection is a real-time data transfer link between the controller and the device that occupies the slot that the configuration data references. When module configuration data is downloaded to an owner-controller, the controller attempts to establish a direct connection to each of the modules referenced by the data.

  • Page 24: High Speed Counter Modules In A Local Chassis

    High Speed Counter Operation Within the ControlLogix System High Speed Counter HSC modules multicast their data periodically. Multicast frequency depends on the options chosen during configuration and where in the M odules in a Local Chassis control system the module physically resides. The data consumer (i.e. an owner-controller) is responsible for knowing that the format of the new data is integers.

  • Page 25: High Speed Counter Modules In A Remote Chassis

    High Speed Counter Operation W ithin the ControlLogix System High Speed Counter If an HSC module resides in a networked chassis, the role of the RPI changes slightly with respect to getting data to the owner. M odules in a Remote Chassis The RPI not only defines when the module multicasts data within its own chassis (as described in the previous section), but also...

  • Page 26: Listen-Only Mode

    High Speed Counter Operation Within the ControlLogix System Listen-Only M ode Any controller in the system can listen to the data from any HSC module even if the controller does not own the module (i.e. it does not have to hold the module’s configuration data to listen to the module).

  • Page 27: What This Chapter Contains

    Chapter ControlLogix High Speed Counter M odule Features and I/O Operation W hat this Chapter Contains This chapter describes features of the ControlLogix HSC module. For information about: See page: Determining Encoder and Sensor Compatibility Features of the ControlLogix High Speed Counter Module Operation in Encoder or Counter Mode Operation in Rate Measurement Mode...

  • Page 28: Features Of The Controllogix High Speed Counter Module

    ControlLogix High Speed Counter M odule Features and I/ O Operation Features of the The following features are available with the ControlLogix HSC module: ControlLogix High Speed Counter M odule Removal and Insertion Under Pow er (RIUP) The HSC module may be inserted and removed from the chassis while power is applied.

  • Page 29: Electronic Keying

    ControlLogix High Speed Counter M odule Features and I/ O Operation Electronic Keying Instead of plastic mechanical backplane keys, electronic keying allows the ControlLogix system to control what modules belong in the various slots of a configured system. During module creation, you must choose one of the following keying options for your I/O module: •...

  • Page 30: Producer/Consumer Model

    ControlLogix High Speed Counter M odule Features and I/ O Operation Producer/Consumer M odel By using the Producer/Consumer model, ControlLogix HSC modules can produce data without having been polled by a controller first. The modules produce the data and any other owner controller device can decide to consume it.

  • Page 31: Operation In Encoder Or Counter Mode

    ControlLogix High Speed Counter M odule Features and I/ O Operation Operation in Encoder or The operation of encoder and count modes is virtually identical. The only difference between the modes is the method used to count. Counter M ode Use the counter mode to read incoming pulses from a maximum of two pulse counters, pulse generators, mechanical limit switches, or similar devices and return them to the controller as a double integer...

  • Page 32: Counter Mode

    ControlLogix High Speed Counter M odule Features and I/ O Operation Counter M ode The module counts incoming pulses from a maximum of 2 pulse counters, pulse generators, mechanical limit switches, and other similar devices, and returns a count to the controller in a double integer number (0-16 million).

  • Page 33: Encoder Mode

    ControlLogix High Speed Counter M odule Features and I/ O Operation Encoder M ode The encoder mode allows the module to read incoming pulses and return them to the controller as a double integer number (0-16 million). In this mode, the module accepts two phase feedback. The module senses the relationship between the two phases and counts up or down accordingly.
  • Page 34 ControlLogix High Speed Counter M odule Features and I/ O Operation Figure 3.2 Diagram of Encoder M ode A Input Input A B Direction Input B Z (Store Count) Input Z Quadrature Encoder (Gate/ Reset) 1756-HSC M odule Forw ard Rotation Reverse Rotation Input A Input B...

  • Page 35: Preset Value

    ControlLogix High Speed Counter M odule Features and I/ O Operation Preset Value Each of the 2 counters has one preset value associated with it. In the encoder or counter modes, the preset value represents a reference point (or count) from which the module begins counting. The module can count either up or down from the preset value.

  • Page 36: Software Reset

    3-10 ControlLogix High Speed Counter M odule Features and I/ O Operation Softw are Reset The counters can also be reset by the Reset Count bits in the tag editor. When one of these bits is set to 1, the associated counter is reset to zero and begins counting.
  • Page 37 ControlLogix High Speed Counter M odule Features and I/ O Operation 3-11 In mode 2, stor e/ wait/ r esume , the gate/reset/terminal inhibits counting when the gate/reset input is high. Counting resumes when the input goes low. Mode 2 does not reset the counter, although it does store the count value.

  • Page 38: Operation In Rate Measurement Mode

    3-12 ControlLogix High Speed Counter M odule Features and I/ O Operation Operation in Rate Rate measurement mode counts incoming pulses on channel A for a user-specified time interval. At the end of the interval, the HSC M easurement M ode module returns a value representing the sampled number of pulses and a value indicating the incoming frequency.

  • Page 39: Sample Period

    ControlLogix High Speed Counter M odule Features and I/ O Operation 3-13 In the previous figure, three counts have been accumulated during the user-selected time period. If you had selected 50mS as the sample period, the frequency returned to the Logix5550 controller: •...

  • Page 40: Controlling The On/Off Output Status

    3-14 ControlLogix High Speed Counter M odule Features and I/ O Operation Controlling the ON/OFF Output Status Each output on the HSC module can be turned ON and OFF at the user’s discretion. The operation of output(s) tied to a counter are performed independently from the controller scans.

  • Page 41: Manual Override Of Outputs

    ControlLogix High Speed Counter M odule Features and I/ O Operation 3-15 M anual Override of Outputs Outputs may be turned ON or OFF by a ladder logic application. Assigning Outputs to Counters By setting bits in the configuration data, you can assign the outputs on the module to any of the various counters.

  • Page 42: Handshaking

    3-16 ControlLogix High Speed Counter M odule Features and I/ O Operation Tying Outputs to Counters You can jumper any of the outputs to any of the counter inputs on the module’s RTB. In this way, it is possible to use the outputs to reset a counter or to cascade counters.

  • Page 43: Module Maximum Frequency

    ControlLogix High Speed Counter M odule Features and I/ O Operation 3-17 M odule M aximum Frequency The HSC module is capable of counting up to 16 million counts from sensors, such as incremental encoders, quadrature encoders, digital rulers, photoswitches and flowmeters. However, the maximum rate at which the counter can accept counts depends on the type of signal directly connected to the module.
  • Page 44 3-18 ControlLogix High Speed Counter M odule Features and I/ O Operation Notes: Publication 1756-UM 007A-EN-P - October 2000...

  • Page 45: What This Chapter Contains

    Chapter Installing and Wiring the ControlLogix High Speed Counter M odule W hat this Chapter Contains This chapter describes how to install ControlLogix modules. For information about: See page: Installing the ControlLogix High Speed Counter Module Keying the Removable Terminal Block Connecting Wiring Wiring an Allen- Bradley 845 Incremental Encoder...
  • Page 46 Installing and W iring the ControlLogix High Speed Counter M odule Use the diagrams below to install your HSC module. 1. Align circuit board with top and bottom chassis guides, as shown. Top Chassis Guide Printed Circuit Board Bottom Chassis Guide 20861-M 2.

  • Page 47: Keying The Removable Terminal Block

    Installing and Wiring the ControlLogix High Speed Counter M odule Keying the Removable Key the RTB to prevent inadvertently connecting the incorrect RTB to your module. Terminal Block When the RTB mounts onto the module, keying positions will match up. For example, if you place a U-shaped keying band in position #4 on the module, you cannot place a wedge-shaped tab in #4 on the RTB or your RTB will not mount on the module.

  • Page 48: Connecting Wiring

    Installing and W iring the ControlLogix High Speed Counter M odule Connecting W iring You can use an RTB to connect wiring to your module. Follow the directions below to connect wires to the RTB. For most applications, we recommend using Belden 8761 cable. The RTB terminations can accommodate 22-14 gauge shielded wire.

  • Page 49: Connect Ungrounded End Of The Cable

    Installing and Wiring the ControlLogix High Speed Counter M odule Connect Ungrounded End of the Cable 1. Cut the foil shield and drain wire back to the cable casing and apply shrink wrap. 2. Connect the insulated wires to the RTB, as shown below. Tw o Types of RTBs (each RTB comes w ith housing) •...

  • Page 50: Recommendations For Wiring Your Rtb

    Installing and W iring the ControlLogix High Speed Counter M odule Recommendations for Wiring Your RTB We recommend you follow these guidelines when wiring your RTB: 1. Begin wiring the RTB at the bottom terminals and move up. 2. Use a tie to secure the wires in the strain relief area of the RTB. 3.
  • Page 51 Installing and Wiring the ControlLogix High Speed Counter M odule Cable Impedance Ω We recommend 150 Belden 9182 cable for use with encoder and module input circuits. Termination of one, or both ends, of the cable with a I M PORTAN T fixed resistor whose value is equal to the cable impedance will not necessarily improve ‘reception’...

  • Page 52: Wiring Terminations

    Installing and W iring the ControlLogix High Speed Counter M odule Wiring Terminations Wiring an Allen-Bradley 845 Incremental Encoder Use the following tables to connect the High Speed Counter module to an Allen-Bradley 845 incremental encoder: Table 4.A W iring Connections for an Allen-Bradley 845 Incremental Encoder Application: A1 Connections: B1 Connections:...

  • Page 53: Wiring An Allen-Bradley Bulletin 872 3-Wire Dc Proximity Sensor

    Installing and Wiring the ControlLogix High Speed Counter M odule W iring an Allen-Bradley Bulletin 872 3-W ire DC Proximity Sensor Use the following table and diagram to connect the High Speed Counter module to an Allen-Bradley 872 3-wire DC proximity sensor: Table 4.B W iring Connections for an Allen-Bradley 872 3-W ire DC Proximity Sensor Application:...

  • Page 54: Wiring A Photoswitch Series 10,000 Photoelectric Sensor

    4-10 Installing and Wiring the ControlLogix High Speed Counter M odule Wiring a Photosw itch Series 10,000 Photoelectric Sensor Use the following table and diagram to connect wiring to a series 10,000 photoelectric sensor: Table 4.C W iring Connections for a Photosw itch Series 10,000 Photoelectric Sensor Application: A1 Connections: B1 Connections:...

  • Page 55: Assembling The Removable Terminal Block And The Housing

    Installing and Wiring the ControlLogix High Speed Counter M odule 4-11 Assembling The Removable Removable housing covers the wired RTB to protect wiring connections when the RTB is seated on the module. Terminal Block and the Housing 1. Align the grooves at the bottom of each side of the housing with the side edges of the RTB.

  • Page 56: Installing The Removable Terminal Block Onto The Module

    4-12 Installing and Wiring the ControlLogix High Speed Counter M odule Installing the Removable Install the RTB onto the module to connect wiring. Terminal Block onto the The RTB is designed to support Removal and W ARN I N G M odule Insertion Under Power (RIUP).

  • Page 57: Removing The Removable Terminal Block From The Module

    Installing and Wiring the ControlLogix High Speed Counter M odule 4-13 Removing the Removable If you need to remove the module from the chassis, you must first remove the RTB from the module. Terminal Block from the M odule The RTB is designed to support Removal and ATTEN TION Insertion Under Power (RIUP).

  • Page 58: Removing The Module From The Chassis

    4-14 Installing and Wiring the ControlLogix High Speed Counter M odule Removing the M odule 1. Push in the top and bottom locking tabs. from the Chassis Locking tabs 20856-M 2. Pull module out of the chassis. 20857- M Chapter Summary In this chapter you learned about: and W hat’s Next •...

  • Page 59: What This Chapter Contains

    Chapter Configuring the ControlLogix High Speed Counter M odule W hat This Chapter Contains This chapter describes how to configure the ControlLogix High Speed Counter module. The following table describes what this chapter contains and its location. For information about: See page: Configuring Your High Speed Counter Module...

  • Page 60: Overview Of The Configuration Process

    Configuring the ControlLogix High Speed Counter M odule Overview of the When you create an HSC module, module-defined data structures and tags are created. The information contained in these structures Configuration Process determines your HSC module’s behavior. The owner-controller sends configuration information to the modules it owns, including any HSC modules, during the download process.

  • Page 61: Creating A New Module

    Configuring the ControlLogix High Speed Counter M odule Creating a New M odule After you have started RSLogix 5000 and created a controller, you must create a new HSC module. The wizard allows you to create a new module and set comunications options. You must be offline when you create a new module.
  • Page 62 Configuring the ControlLogix High Speed Counter M odule A screen appears with a list of possible new modules for your application. Make sure the Major Revision number matches the label on the side of your module 1. 1. Select a 1756-HSC module 2.
  • Page 63 Configuring the ControlLogix High Speed Counter M odule Although each screen maintains importance during online monitoring, two screens that appear during module creation process are not accessible. They are shown here to maintain the graphical integrity of RSLogix 5000. After the naming page, this screen appears. Adjust the Requested Packet Interval here Inhibit the connection to the module here If you want a Major Fault on the...

  • Page 64: Communications Format

    Configuring the ControlLogix High Speed Counter M odule Communications Format The communications format determines what type of configuration options are made available, what type of data is transferred between the module and its owner controller. This feature also defines the connection between the controller writing the configuration and the module itself.

  • Page 65: Electronic Keying

    Configuring the ControlLogix High Speed Counter M odule Electronic Keying When you create a new HSC module, you can choose how specific the keying must be when a module is inserted into the HSC module’s slot in the chassis. The screen below shows the choices available. For a detailed explanation about electronic keying options, see page 3-3.
  • Page 66 Configuring the ControlLogix High Speed Counter M odule Configuration Structure You must use the Configuration tags to alter HSC module configuration. The following table lists and defines HSC Configuration tags: Table 5.A High Speed Counter M odule Configuration Tags Name: Data Style: Definition:...
  • Page 67 Configuring the ControlLogix High Speed Counter M odule Table 5.A High Speed Counter M odule Configuration Tags Name: Data Style: Definition: Change Type: During Operation: C.ZInvert.0 BOOL Decimal Designates whether channel 0 Z value is inverted. 0 = do not invert Z value 1 = invert Z value C.FilterA.0 BOOL...
  • Page 68 5-10 Configuring the ControlLogix High Speed Counter M odule Table 5.A High Speed Counter M odule Configuration Tags Name: Data Style: Definition: Change Type: During Operation: C.FilterA.1 BOOL Decimal Designates whether channel 1 uses filter A. 0 = do not use filter A 1 = use filter A C.FilterB.1 BOOL...
  • Page 69 Configuring the ControlLogix High Speed Counter M odule 5-11 Table 5.A High Speed Counter M odule Configuration Tags Name: Data Style: Definition: Change Type: During Operation: C.Output[1].ToThisCounter SINT Decimal Designates counter to which output 1 is tied. 0 = not tied to counter 1 = tied to counter (0) 2 = tied to counter (1) C.Output[1].FaultMode...
  • Page 70 5-12 Configuring the ControlLogix High Speed Counter M odule Table 5.A High Speed Counter M odule Configuration Tags Name: Data Style: Definition: Change Type: During Operation: C.Output[3].ONValue[1] DINT Decimal Designates the second value at which output 3 turns ON. Yes C.Output[3].OFFValue[1] DINT Decimal...
  • Page 71 Configuring the ControlLogix High Speed Counter M odule 5-13 Table 5.B High Speed Counter M odule Output Tags Name: Type: Style: Definition: Change During Operation: O.ResetCounter.1 BOOL Decimal Resets counter 1 and begins counting. 0 = do not reset 1 = reset O.LoadPreset.1 BOOL Decimal...
  • Page 72 5-14 Configuring the ControlLogix High Speed Counter M odule Input Tags You must use the Input tags to monitor HSC module status. The following table lists and defines HSC Input tags: Table 5.C High Speed Counter M odule Input Tags Name: Type: Style:...
  • Page 73 Configuring the ControlLogix High Speed Counter M odule 5-15 Table 5.C High Speed Counter M odule Input Tags Name: Type: Style: Definition: I.NewDataFlag.1 BOOL Decimal Displays whether channel 1 received new data on the last scan. 0 = no new data was received 1 = new data was received I.ZState.1 BOOL...
  • Page 74 5-16 Configuring the ControlLogix High Speed Counter M odule Error Codes The table below lists possible errors on your HSC module. These errors are displayed on the Connection tab of the Module Properties section in RSLogix 5000 (e.g. see page 6-3) and in the .EXERR field of the message variable when your reconfigure the HSC module.

  • Page 75: Accessing The Tags

    Configuring the ControlLogix High Speed Counter M odule 5-17 Accessing the Tags When you access tags to change configuration or monitor the I/O data exchange, you have two options.: • Monitor tags - option allows you to view tags and change their values •...

  • Page 76: Changing Configuration Information At The Tags

    5-18 Configuring the ControlLogix High Speed Counter M odule Changing Configuration Some configurable features are changed on a module-wide basis and some on a point-by-point basis. Information at the Tags Configurable Features There are two ways to change the configuration: •...

  • Page 77: Downloading Configuration Data

    Configuring the ControlLogix High Speed Counter M odule 5-19 Dow nloading After you have changed the configuration data for an HSC module, the change does not actually take affect until you download the new Configuration Data program which contains that information. This downloads the entire program to the controller overwriting any existing programs.

  • Page 78: Changing Configuration During Hsc Module Operation

    5-20 Configuring the ControlLogix High Speed Counter M odule Changing Configuration After the HSC module has begun operation, you can only change configuration by using ladder logic and message instructions. During HSC M odule Operation Follow these steps to change HSC module configuration during operation: 1.
  • Page 79 Configuring the ControlLogix High Speed Counter M odule 5-21 Double-click here to Click here to access the IM PORTANT : M essage enter the M ain Routine configuration message instructions are instruction for this rung. explained on page 5-22. Rung 0 sends the configuration data the 1756-HSC module upon a pow er-up or program to run transition.

  • Page 80: Using Message Instructions

    5-22 Configuring the ControlLogix High Speed Counter M odule Using M essage Ladder logic uses message instructions to change the HSC module configuration during module operation. Instructions Message instructions maintain the following characteristics: • messages use unscheduled portions of system communications bandwidth •...

  • Page 81: Creating A New Tag

    Configuring the ControlLogix High Speed Counter M odule 5-23 Creating a New Tag Ladder logic is written in the Main Routine section of RSLogix 5000. Double-click here to enter the M ain Routine After adding a message instruction to a rung, you must create a tag for the message instruction 1 Right-click on the...

  • Page 82: Enter Message Configuration

    5-24 Configuring the ControlLogix High Speed Counter M odule Enter M essage Configuration After creating a new tag, you must enter message configuration. Click here to see the message configuration pop-up screens Enter message configuration on the following screens: • Configuration pop-up screen •...
  • Page 83 Configuring the ControlLogix High Speed Counter M odule 5-25 The following table contains information that must be entered on the configuration pop-up screen to perform the example HSC module service: Table 5.E Configuration M essage Values Enter the following: To send a Configuration Message: Service Code Object Type...

  • Page 84: Configuring Hsc Modules In A Remote Chassis

    5-26 Configuring the ControlLogix High Speed Counter M odule If the HSC module resides in the same chassis as the controller, the path contains two digits, accounting for the backplane and slot number of the HSC module. In the example above, a path of 1,6 is used. •...
  • Page 85 Configuring the ControlLogix High Speed Counter M odule 5-27 1. Create a 1756-CNB or 1756-CNBR module in the local chassis. 1. Select I/ O Configuration. 2. Click on the right mouse button to display the menu. 3. Select New M odule 2.

  • Page 86: Chapter Summary And What's Next

    5-28 Configuring the ControlLogix High Speed Counter M odule 5. Add remote HSC modules to your configuration through the remote 1756-CNB or 1756-CNBR module. 1. Select the local communications module 2. Click on the right mouse button and select New M odule Configure remote HSC modules using the same procedures detailed earlier in this chapter to configure local HSC modules.

  • Page 87: Troubleshooting Your M Odule

    Chapter Troubleshooting Your M odule W hat This Chapter Contains This chapter describes the indicators on the ControlLogix HSC module and how to use them to troubleshoot the module. The following table describes what this chapter contains and its location. For information about: See page: Using Indicators to Troubleshoot Your...

  • Page 88: Using Rslogix 5000 To Troubleshoot Your Module

    Troubleshooting Your M odule Table 6.A This display: Means: Take this action: indicator On/Yellow Input turned on None Output Output turned off If you need to use the (0, 1, 2, 3) Output not currently output, check input used wiring connections and your ladder program On/Yellow...
  • Page 89 Troubleshooting Your M odule The screens below display fault notification in RSLogix 5000. Warning signal on main screen Warning icon w hen a communications fault occurs or if the module is inhibited Warning signal - The module in slot 5 has a communications fault Fault message in status line Status section lists Major and Minor Faults and the Internal State of...

  • Page 90: Determining Fault Type

    Troubleshooting Your M odule Determining Fault Type When you are monitoring a module’s configuration properties in RSLogix 5000 and receive a Communications fault message, the Connection page lists the type of fault. The fault type is listed here In this example, Error 16#0011 means Counter 0 was set to an invalid Operational Mode For a detailed listing of the possible faults, their causes and suggested...

  • Page 91: Chapter Summary And What's Next

    Troubleshooting Your M odule Table 6.B Common Problems w ith High Speed Counter Applications Problem: Possible Solution(s): Despite a module fault, outputs do Make sure C.Output[x].FaultMode is not selected to 1, not turn OFF. which means “ Outputs Turn OFF” during a fault. Make sure C.Output[x].ProgMode is not selected to 1, The owner-controller is in Program Mode but the HSC module outputs...
  • Page 92 Troubleshooting Your M odule Notes: Publication 1756-UM 007A-EN-P - October 2000...

  • Page 93: Specifications

    Appendix Specifications Use this appendix to see the ControlLogix High Speed Counter module specifications. 1756- HSC Specifications Module Location 1756 ControlLogix Chassis Backplane Current 300mA @ 5.1V dc , 3mA @ 24V dc (1.6 W) Maximum Power Dissipation 5.6 W @ 60°C Thermal Dissipation 19.1 BTU/hr Number of Counters...
  • Page 94 A- 2 Specifications Minimum Load Current 3mA/point (5V operation) 40mA/point (12-24V operation) Maximum On- state Voltage 0.55V Drop/Output 300 µ A/point Maximum Off-State Leakage Current/Output Output Delay Time 20 µ s typical Off to On 50 µ s maximum 60 µ s typical On to Off 300 µ...

  • Page 95: Application Considerations

    Appendix Application Considerations Appendix Objectives This appendix provide background for selecting the appropriate input device for your 1756-HSC module, explain the output circuit, and provide you with information for selecting the type and length of input cabling. Types of Input Devices To turn on an input circuit in the 1756-HSC module, you must source current through the input resistors sufficient to turn on the opto-isolator in the circuit.

  • Page 96: Examples For Selecting Input Devices

    B- 2 Application Considerations Examples for Selecting The following examples help you determine the best input type for your particular application. These examples include: Input Devices • 5V differential line driver • single-ended driver • open collector circuit • electromechanical limit switch Circuit Overview To make sure your signal source and the 1756-HSC module are compatibility, you need to understand the electrical characteristics of your...

  • Page 97: Detailed Circuit Analysis

    Application Considerations B- 3 The previous calculation is necessary because the driving device must cause a minimum of 5mA to flow through the photodiode regardless of which jumper position is selected. The optical isolator manufacturer recommends a maximum of 8mA to flow through the photodiode.

  • Page 98: 5V Differential Line Driver Example

    B- 4 Application Considerations Look at the following 5V differential line driver example to see why this is important. 5V Differential Line Driver Example You want to use a 5V differential line driver in your encoder when you have a long cable run and/or high input frequency or narrow input pulses (input duty cycle <...

  • Page 99: To +24V Single_Ended Driver

    Application Considerations B- 5 To determine how much current flows, use the following equation: drive drop resistor 3.3V - 1.6V = 1.7V 1.5V/150 ohm = 11.3mA As you can see, 1.6V is too low. drop Remember that Vdrop varies linearly from about 1.6V to 2.0V as I varies from 4 to 8mA.

  • Page 100: Open Collector

    B- 6 Application Considerations If the input is applied to the 12-24V terminal, the current to the photodiode is limited by the series resistance of R3 and R4 (about 1.15Kohms). A protection circuit consisting of Q2, R7 and R8 is included. If the current through the photodiode exceeds about 8mA, the voltage across R7 and R8 is sufficient to turn Q2 on, shunting any additional current away from the photodiode.
  • Page 101 Application Considerations B- 7 impedance. Note that there is insufficient current with the jumper in the 12-24V position and a +12V supply. 5V DIFFERENTIAL Input Terminals LINE DRIVER 40.2 40.2 + 12 to 24V HIGH DRIVE 22 ohm INPUT DRIVE 40.2 40.2 + 12 to 24V...

  • Page 102: Output Circuits

    B- 8 Application Considerations Output Circuits The 1756-HSC module contains 2 isolated pairs of output circuits. Customer supplied power, ranging from +5V to +24V dc, is connected internally (through terminal Vcc) to the power output transistors. When an output is turned on, current flows into the drain, out of the source, through the fuse and into the load connected to the ground of the customer supply (customer return).

  • Page 103: Application Considerations

    Application Considerations B- 9 Application Considerations A successful installation depends on the type of input driver, input cable length, input cable impedance, input cable capacitance, frequency of the input. The following provides information on these installation factors for the 1756-HSC module. Input Cable Length Maximum input cable length depends on the type of output driver in your encoder, the kind of cable used, and maximum frequency at which you will...

  • Page 104: Cable Impedance

    B- 10 Application Considerations Cable Impedance Generally, you want the cable imedance to match the source and/or load as closely as possible. Using 150 ohm Belden 9182 (or equivalent) cable more closely matches the impedance of both encoder and module input circuits than 78 ohm cable, such as Belden 9463.

  • Page 105: Index

    Index Numerics Class I Division 2 1756-CNB/CNBR Module 5-27 Certification 3-4 1756-TBCH Cage Clamp RTB 4-5 Communications 1756-TBE Extended Housing 4-6, Producer/consumer model 3-4 4-11 Communications Format P-2, 5-6 1756-TBS6H Spring Clamp RTB 4-5 Choosing in RSLogix 5000 5-4 HSC data 5-6 Listen-only-HSC Data 5-6 Accessing Module Tags 5-17 Compatibility...
  • Page 106 I- 2 Connections P-2, 2-1 Encoder Compatibility 3-1 Direct P-2 Allen-Bradley 845 incremental Direct Connection 2-3 encoder 3-1 Listen-only 2-6 Encoder X1 Mode 1-2, 3-5, 3-7, 3-13 Continuous Programs 3-2 Encoder X4 Mode 1-2, 3-5, 3-7, 3-13 ControlBus P-2, 1-2, 1-4 Error Codes 5-16 Controller Exact Match...
  • Page 107 I- 3 Module Fault Reporting 3-2 Keying Module Maximum Frequency 3-16 Compatible match P-2, 3-3 Disable P-2 Disable keying 3-3 Network Update Time (NUT) P-2 Electronic P-2, 3-3, 5-4, 5-7 for ControlNet 2-2 Exact match P-2, 3-3 Mechanical 1-4 Mechanically keying the RTB Output Control Assigning outputs to counters the Removable Terminal Block...
  • Page 108 RIUP module 6-2 Removal and insertion under Using with RSNetWorx 2-2 power P-3, 1-2, 1-5, 3-2 RSNetworx Rockwell Automation Support 4 Using with RSLogix 5000 2-2 Rollover Value Mode 3-5, 3-9 RTB P-3, 1-3 RPI P-3 1756-TBCH cage clamp 4-5...
  • Page 109 3-5, 3-11 Wiring recommendations 4-6 Storing the Count Value 3-10 Wiring the cage clamp RTB 4-5 Support Wiring the spring clamp RTB Rockwell Automation 4 Run Mode P-3 Totem-pole Output Devices 4-7 Troubleshooting Sample Period 3-13 Module fault reporting 3-2...
  • Page 110 I- 6 Using Belden 9182 cable 4-6, Z Invert Mode 3-5 Publication 1756- UM007A-EN- P - October 2000...
  • Page 111 Allen- Bradley Publication Problem Report If you find a problem with our documentation, please complete and return this form. Pub. Name ControlLogix High Speed Counter Module User Manual Cat. No. 1756- HSC Pub. No. 1756- UM007A-EN- P Pub. Date October Part No.
  • Page 112 PLEASE FASTEN HERE (DO NOT STAPLE) Other Comments PLEASE FOLD HERE NO POSTAGE NECESSARY IF MAILED IN THE UNITED STATES BUSINESS REPLY MAIL FIRST-CLASS MAIL PERMIT NO. 18235 CLEVELAND OH POSTAGE WILL BE PAID BY THE ADDRESSEE 1 ALLEN BRADLEY DR MAYFIELD HEIGHTS OH 44124-9705...
  • Page 114 Publication 1756- UM007A-EN- P - October 2000 PN 957345-08 Supersedes Publication 1756-6.5.18 - July 1999 © (2000) Rockwell International Corporation. Printed in the U.S.A.

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