1756-UM007A-EN-P, ControlLogix High Speed Counter

Table of ContentsChapter 1W hat is the ControlLogixHigh Speed Counter M odule?What This Chapter Contains . . . . . . . . . . . . .What is the ControlLogix High Speed CounterPurpose of the HSC Module . . . . . . . . . . .Using An High Speed Counter Modulein the ControlLogix System . . . . . . . . . . . . . .Features of the ControlLogix High SpeedCounter Modules . . . . . . . . . . . . . . . . . . .Preventing Electrostatic Discharge . . . . . . . . .Removal and Insertion Under Power . . . . . . .Chapter Summary and What’s Next . . . . . . . . . . . . . . . . . 1-1Module? . . . 1-1. . . . . . . . . . 1-2. . . . . . . . . . 1-3.1-31-41-51-5What This Chapter Contains . . . . . . . . . . . . . . . . . . . . . .Ownership and Connections . . . . . . . . . . . . . . . . . . . . . .Using RSNetWorx and RSLogix 5000 . . . . . . . . . . . . . . . .Enabling HSC Module Operation in a Remote Chassis .Direct Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . .High Speed Counter Module Operation . . . . . . . . . . . . . .High Speed Counter Modules in a Local Chassis. . . . . . . .Requested Packet Interval (RPI) . . . . . . . . . . . . . . . . .High Speed Counter Modules in a Remote Chassis . . . . . .Listen-Only Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Chapter Summary and What’s Next . . . . . . . . . . . . . . . . er 2High Speed Counter OperationW ithin the ControlLogix SystemChapter 3ControlLogix High SpeedCounter M odule Featuresand I/O OperationiWhat this Chapter Contains . . . . . . . . . . . . . . . . . . . . . . .Determining Encoder and Sensor Compatibility . . . . . . . .Features of the ControlLogix High Speed Counter ModuleRemoval and Insertion Under Power (RIUP) . . . . . . . .Module Fault Reporting . . . . . . . . . . . . . . . . . . . . . . .Fully Software Configurable . . . . . . . . . . . . . . . . . . . .Electronic Keying. . . . . . . . . . . . . . . . . . . . . . . . . . . .Producer/Consumer Model. . . . . . . . . . . . . . . . . . . . .LED Status Information. . . . . . . . . . . . . . . . . . . . . . . .Full Class I Division 2 Compliance . . . . . . . . . . . . . . .CE/CSA/UL Agency Certification . . . . . . . . . . . . . . . . .Operation in Encoder or Counter Mode . . . . . . . . . . . . . .Counter Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Encoder Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Preset Value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Rollover Value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Software Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Gate/Reset Input (Z) . . . . . . . . . . . . . . . . . . . . . . . . .Store Count . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Publication 1756-UM 007A-EN-P - October 2000

Table of ContentsiiOperation in Rate Measurement Mode . . .Sample Period . . . . . . . . . . . . . . . . . .Connection to Channel Inputs . . . . . .Outputs . . . . . . . . . . . . . . . . . . . . . . . . .Controlling the ON/OFF Output StatusManual Override of Outputs. . . . . . . .Assigning Outputs to Counters . . . . . .Operation of Outputs. . . . . . . . . . . . .Handshaking . . . . . . . . . . . . . . . . . . .Module Maximum Frequency . . . . . . .Chapter Summary and What’s Next . . . . er 4Installing and W iring theControlLogix High SpeedCounter M oduleWhat this Chapter Contains . . . . . . . . . . . . . . . . . . . . . . . . 4-1Installing the ControlLogix High Speed Counter Module . . . 4-1Keying the Removable Terminal Block. . . . . . . . . . . . . . . . 4-3Connecting Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4Connect Grounded End of the Cable . . . . . . . . . . . . . . 4-4Connect Ungrounded End of the Cable . . . . . . . . . . . . . 4-5Two Types of RTBs (each RTB comes with housing) . . . 4-5Recommendations for Wiring Your RTB . . . . . . . . . . . . 4-6Cable Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6Wiring Terminations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8Wiring an Allen-Bradley 845 Incremental Encoder. . . . . 4-8Wiring an Allen-Bradley Bulletin 8723-Wire DC Proximity Sensor . . . . . . . . . . . . . . . . . . . . . 4-9Wiring a Photoswitch Series 10,000 Photoelectric Sensor 4-10Assembling The Removable Terminal Blockand the Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11Installing the Removable Terminal Block onto the Module . 4-12Removing the Removable Terminal Block from the Module 4-13Removing the Module from the Chassis . . . . . . . . . . . . . . . 4-14Chapter Summary and What’s Next . . . . . . . . . . . . . . . . . . 4-14Chapter 5Configuring the ControlLogixHigh Speed Counter M odulePublication 1756-UM 007A-EN-P - October 2000What This Chapter Contains . . . . . . . . . . . . . .Configuring Your High Speed Counter Module.RSLogix 5000 Configuration Software . . . . .Overview of the Configuration Process . . . . . .Using the Default Configuration . . . . . . . . .Altering the Default Configuration . . . . . . .Creating a New Module . . . . . . . . . . . . . . . . . .Communications Format. . . . . . . . . . . . . . .Electronic Keying. . . . . . . . . . . . . . . . . . . .High Speed Counter Data Structures . . . . . .5-15-15-15-25-25-25-35-65-75-7

Table of ContentsAccessing the Tags . . . . . . . . . . . . . . . . . . . . . . . . . . .Changing Configuration Information at the Tags. . . . . .Configurable Features . . . . . . . . . . . . . . . . . . . . . .Downloading Configuration Data. . . . . . . . . . . . . . . . .Changing Configuration During HSC Module OperationUsing Ladder Logic . . . . . . . . . . . . . . . . . . . . . . . .Using Message Instructions . . . . . . . . . . . . . . . . . . . . .Processing Real-Time Control and Module Services .One Service Performed Per Instruction . . . . . . . . . .Creating a New Tag . . . . . . . . . . . . . . . . . . . . . . . . . .Enter Message Configuration . . . . . . . . . . . . . . . . .Configuring HSC Modules in a Remote Chassis. . . . . . .Chapter Summary and What’s Next . . . . . . . . . . . . . . -265-28.6-16-16-16-26-4Chapter 6Troubleshooting Your M oduleWhat This Chapter Contains . . . . . . . . . . . . . . . . .Using Indicators to Troubleshoot Your Module . . .LED indicators for the HSC module . . . . . . . . .Using RSLogix 5000 to Troubleshoot Your Module .Determining Fault Type . . . . . . . . . . . . . . . . . .Solving Common Problemsin High Speed Counter Applications . . . . . . . . . . .Chapter Summary and What’s Next . . . . . . . . . . . . . . . . . 6-4. . . . . . 6-5Appendix ASpecifications1756-HSC Specifications . . . . . . . . . . . . . . . . . . . . . . . . A-1Appendix BApplication ConsiderationsAppendix Objectives . . . . . . . . . . . . . .Types of Input Devices . . . . . . . . . . . .Examples for Selecting Input Devices. .Circuit Overview . . . . . . . . . . . . . .Detailed Circuit Analysis. . . . . . . . .5V Differential Line Driver Example 12 to 24V Single Ended Driver . .Open Collector . . . . . . . . . . . . . . .Electromechanical Limit Switch. . . .Output Circuits . . . . . . . . . . . . . . . . . .Application Considerations . . . . . . . . .Input Cable Length . . . . . . . . . . . .Totem-pole Output Devices . . . . . .Cable Impedance . . . . . . . . . . . . . .Cable Capacitance . . . . . . . . . . . . .Cable Length and Frequency . . . . 10IndexPublication 1756-UM 007A-EN-P - October 2000

Table of ContentsivPublication 1756-UM 007A-EN-P - October 2000

Chapter1What is the ControlLogixHigh Speed Counter M odule?W hat This Chapter ContainsThis chapter describes the ControlLogix HSC module and what youmust know and do before you begin to use it.For information about:See page:What is the ControlLogix High Speed1-1Counter Module?Using An High Speed Counter M odule in the1-3ControlLogix SystemFeatures of the ControlLogix High Speed1-3Counter ModulesPreventing Electrostatic Discharge1-4Removal and Insertion Under Power1-5Chapter Summary and What’s Next1-5W hat is the ControlLogixHigh Speed CounterM odule?The ControlLogix HSC module is an intelligent I/O module providingfour high speed output switching, ON-OFF windows, and usingpulses from quadrature encoders, pulse generators, proximityswitches and other similar products for counting or frequency.These high speed digital outputs are dedicated to one of tworotational position sensors and not affected by any changes occurringin the ControlLogix controller. The module outputs provide consistentswitch ON and switch OFF times for repeatable speed compensation.Using the producer/consumer network model, controllers canproduce information for any controller that may use it. A singleencoder may drive multiple modules as long as it provides theminimum current required for each module.The HSC is a single-slot module that requires a separate externalpower supply for its outputs. For more information on specific voltageand current requirements, see the specifications listed in Appendix A.1Publication 1756-UM 007A-EN-P - October 2000

1-2What is the ControlLogix High Speed Counter M odule?High speed inputs, as found on the HSC module, may be sensitive toelectromagnetic noise. The module contains opto-isolators thatminimize the effects of noise, but you should provide groundingmethods that keep noise spikes under 2000V for backplane(ControlBus) protection and under 1000V for channel-to-channelprotection.I M PORTAN TThe HSC module must reside in the same chassis asthe Logix5550 controller for maximum performancewith the controller.The following is a list of the features available on the ControlLogixHSC module: Removal and insertion under power (RIUP) - a system featurethat allows you to remove and insert modules while chassispower is applied Operation in any of the following modes: Counter, Encoder X1,Quadrature Encoder (Encoder X4) or Rate MeasurementFrequency - each mode allows the HSC module to operate witha specific maximum frequency Two configurable channels with up to 3 single-ended ordifferential (user-defined) inputs per channel Four current-sourcing outputs at 5-30V dc with 1A maximum peroutput that can turn ON and OFF within 300 µs Class I/Division 2, UL, CSA, and CE Agency CertificationPurpose of the HSC M oduleThe most common use for the HSC Module is to interface 1 or 2incremental encoders to the ControlLogix platform. It can also beused to count high speed pulse streams from 1 or 2 discrete devicessuch as a proximity or photoelectric control.Publication 1756-UM 007A-EN-P - October 2000

1-3What is the ControlLogix High Speed Counter M odule?Using An High SpeedCounter M odule in theControlLogix SystemAn HSC module performs high speed counting for industrialapplications. The module interfaces with a ControlLogix Logix5550controller to report the number of counts at each frequency.A ControlLogix HSC module mounts in a ControlLogix chassis anduses a Removable Terminal Block (RTB) to connect all field-sidewiring.Before you install and use your module you should have already: installed and grounded a 1756 chassis and power supply. Toinstall these products, refer to publications 1756-5.67, 1756-5.78and 1756-5.80.I M PORTAN TA grounded 1756 chassis is not sufficient to minimizeencoder noise. You should use continuous overallshielded cable that is properly grounded to a signalground. The signal ground must be separate fromthe AC earth ground used to protect personnel. ordered and received an RTB and its components. RTBs are notincluded with your module purchase.Features of the ControlLogix High Speed Counter M odulesControlLogix HSC M oduleRemovableTerminalBlockIndicatorsLocking tabTop andbottomguidesControlBus ConnectorConnectorpinsSlots forkeying theRTB41623Publication 1756-UM 007A-EN-P - October 2000

1-4What is the ControlLogix High Speed Counter M odule?Contr olBus connector - The backplane interface for theControlLogix system connects the module to the ControlBusbackplane.Connectors pins - Input/output, power and grounding connectionsare 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.Slots for keying - Mechanically keys the RTB to preventinadvertently making the wrong wire connections to your module.Status indicators - Indicators display the status of communication,module health and presence of input/output devices. Use theseindicators to help in troubleshooting.Top and bottom guides - Guides provide assistance in seating theRTB onto the module.Preventing ElectrostaticDischargeThis module is sensitive to electrostatic discharge when handledoutside of the chassis. The module has been tested to withstand anelectrostatic discharge while operating within the chassis.ATTEN TION!Electrostatic discharge can damageintegrated circuits or semiconductors if you touchbackplane connector pins. Follow these guidelineswhen you handle the module: Touch a grounded object to discharge staticpotential Wear an approved wrist-strap grounding device Do not touch the backplane connector orconnector pins Do not touch circuit components inside themodule If available, use a static-safe work station When not in use, keep the module in itsstatic-shield boxPublication 1756-UM 007A-EN-P - October 2000

What is the ControlLogix High Speed Counter M odule?Removal and InsertionUnder Pow er1-5These modules are designed to be installed or removed while chassispower is applied.ATTEN TION!When you insert or remove a module whilebackplane power is applied, an electrical arc mayoccur. An electrical arc can cause personal injuryor property damage by: sending an erroneous signal to your system’sfield devices causing unintended machinemotion or loss of process control. causing an explosion in a hazardousenvironment.Repeated electrical arcing causes excessive wear tocontacts on both the module and its matingconnectors. Worn contacts may create electricalresistance that can affect module operation.Chapter Summaryand W hat’s NextIn this chapter you learned about: what the ControlLogix HSC module isusing the HSC module in the ControlLogix systempreventing electrostatic dischargeremoving and inserting the module under powerMove on to Chapter 2 to learn about High Speed Counter operationwithin the ControlLogix system.Publication 1756-UM 007A-EN-P - October 2000

1-6What is the ControlLogix High Speed Counter M odule?Notes:Publication 1756-UM 007A-EN-P - October 2000

Chapter2High Speed Counter Operation Withinthe ControlLogix SystemW hat This Chapter ContainsThis chapter describes how the HSC module works within theControlLogix system.For information about:Ow nership andConnectionsSee page:Ownership and Connections2-1Using RSNetWorx and RSLogix 50002-2Direct Connections2-3High Speed Counter Module Operation2-3High Speed Counter Modules in a LocalChassis2-4Requested Packet Interval (RPI)2-4High Speed Counter Modules in a RemoteChassis2-5Listen-Only Mode2-6Chapter Summary and What’s Next2-6Every HSC module in the ControlLogix system must be owned by aLogix5550 Controller. This owner-controller stores configuration datafor every HSC module that it owns. Other controllers may also talk tothe HSC module through the owner-controller.The owner-controller sends configuration data to the HSC module,defining the module’s behavior within the control system. Each HSCmodule continuously maintains communication with its owner duringnormal operation. When connections are severed or compromised,the HSC module performs as configured, either setting all outputs toreset (ON or OFF) or continuous operations.1Publication 1756-UM 007A-EN-P - October 2000

2-2High Speed Counter Operation Within the ControlLogix SystemUsing RSNetWorx andRSLogix 5000When an HSC module is created, the I/O configuration portion ofRSLogix5000 generates configuration data structures and tags for thatHSC module, whether the module is located in a local or remotechassis. A remote chassis, also known as networked, contains the HSCmodule but not the module’s owner-controller.After creating the HSC module, you can write specific configuration inthe module’s data structures; you must access the module tags tochange information in the data structures. This process is explained indetail in Chapter 5.I M PORTAN TApplication-specific configuration data is transferredto the controller during the program download andsent to the HSC module during the initial power-up.After HSC module operation has begun, you mustuse ladder logic and message instructions to makeconfiguration changes.Enabling HSC M odule Operation in a Remote ChassisHSC modules in the same chassis as the controller are ready to run assoon as the program download is complete. But you must runRSNetWorx to enable HSC modules in the networked chassis.Running RSNetWorx transfers configuration data to networkedmodules and establishes a Network Update Time (NUT) forControlNet that is compliant with the desired communications optionsspecified for each module during configuration.If you are not using HSC modules in a networked chassis, runningRSNetWorx is not necessary. However, anytime a controller referencesan HSC module in a networked chassis, RSNetWorx must be run toconfigure ControlNet.Follow these general guidelines when configuring HSC modules:1. Configure all HSC modules for a given controller using RSLogix5000 and download that information to the controller.2. If the HSC configuration data references a module in a remotechassis, run RSNetWorx.I M PORTAN TPublication 1756-UM 007A-EN-P - October 2000RSNetWorx must be run whenever a new module isadded to a networked chassis. When a module ispermanently removed from a remote chassis, werecommend that RSNetWorx be run to optimize theallocation of network bandwidth.

High Speed Counter Operation W ithin the ControlLogix SystemDirect Connections2-3A dir ect connection is a real-time data transfer link between thecontroller and the device that occupies the slot that the configurationdata references. When module configuration data is downloaded toan owner-controller, the controller attempts to establish a directconnection to each of the modules referenced by the data. One of thefollowing events occurs: If the data is appropriate to the module found in the slot, aconnection is made and operation begins. If the configuration data is not appropriate, the data is rejectedand an error message displays in the software. In this case, theconfiguration data can be inappropriate for any of a number ofreasons. For e

1756-PA75/A, -PB75/A ControlLogix Power Supply Installation Instructions 1756-5.78 1756-A4, -A7, -A10, -A13, -A17 ControlLogix Chassis Installation Instructions 1756-5.80 1756 Series ControlLogix System User Manual 1756-UM001 ControlLogix Digital I/O Modules User Manual 1756-6.5.8 ControlLogix Analog I/O Modules User Manual 1756-6.5.9