Spectrum-controls 1746sc-CTR4 Manuel d'utilisateur Page 1

SLC 500™ 50 KHZ COUNTER /FLOWMETER INPUT MODULECatalog Numbers1746sc-CTR41746sc-CTR8Owner’sGuide 0300181-05 Rev.G

10 SLC 500™ 50 KHz Counter / Flowmeter Input ModuleData Format Counter mode Max Binary Value: -8,388,608 to +8,388,607 Rate mode Max Binary Val

Installing And Wiring Your ModuleRead this chapter to install and wire your module. This chapter covers:• avoiding electrostatic damage• determining p

12 ControlLogix™ Counter ModuleThe following documents contain information that may help you as youinstall and wire your module:• National Electrical

Chapter 2: Installing And Wiring Your Module 13Determining PowerRequirementsThe backplane of the system can provide both 5 Vdc and 24 Vdc power.The f

14 ControlLogix™ Counter ModuleCAUTIONPOSSIBLE EQUIPMENT OPERATIONBefore installing or removing your module, always disconnectpower from the SLC 500 s

Chapter 2: Installing And Wiring Your Module 152. Slide your module into the chassis until both top and bottom retainingclips are secure. Apply firm e

16 ControlLogix™ Counter Modulefoil shield to their ground points. Connect only one end of the shield tothe module.2. At each end of the cable, strip

Chapter 2: Installing And Wiring Your Module 17To guard against electrostatic damage and improve chassis grounding,connect one of the shield pins on t

18 ControlLogix™ Counter ModuleLabeling And Re-Installing TheTerminal Block(if it is removed)The supplied label is mounted on the module door. This la

Things To Consider Before UsingYour ModuleThis chapter explains how the module and the SLC processorcommunicate through the processor’s I/O image tabl

20 SLC 500™ 50 KHz Counter / Flowmeter Input ModuleModule AddressingThe CTR-8 module uses 32 input and 32 output registers, and the CTR-4module uses 1

Chapter 3: Things To Consider Before Using Your Module 21Output Image - Configuration WordsThirty-two (CTR-8) or sixteen (CTR-4) words of the SLC proc

22 SLC 500™ 50 KHz Counter / Flowmeter Input ModuleOperating ModesThe module’s operating mode determines the number of available countersand which inp

Chapter 3: Things To Consider Before Using Your Module 23Note: The X1 Quadrature mode provides additional Anti-Jittercircuitry. This distinguishes be

24 SLC 500™ 50 KHz Counter / Flowmeter Input ModuleGate ModesThere are two methods to gate (start/stop) your counter, hardware andsoftware. The count

Chapter 3: Things To Consider Before Using Your Module 25Input ResponseWhen a counter slot is disabled, the counter module continues to updateits inpu

26 SLC 500™ 50 KHz Counter / Flowmeter Input Module

Channel Configuration, Data,and StatusRead this chapter to:• configure each input channel• set user-defined scale limits• monitor each input channel•

28 SLC 500™ 50 KHz Counter / Flowmeter ModuleFigure 4.1 - Configuration WordChannel 1 Rate Limit / R FactorO:e.7Channel 1 Limit / K FactorO:e.6Channe

Chapter 4: Channel Configuration, Data, and Status 29Figure 4.2 - Configuration Word SettingsScale / Limit Mode Roll under to Roll over to DirectrionC

Important Notes1. Please read all the information in this owner’s guide before installingthe product.2. The information in this owner's guide app

30 SLC 500™ 50 KHz Counter / Flowmeter ModuleReset Flags: (Configuration Bit 2)The reset flags command is performed when this bit is set. Reset flags

Chapter 4: Channel Configuration, Data, and Status 31Rate - Instant:When this bit is reset to “0” the rate detection circuit operates in “Instant”mode

32 SLC 500™ 50 KHz Counter / Flowmeter ModuleCount Mode: (Configuration Bits 6-7)The Count Mode bit selects 1 of 4 types of counter operation.The Unid

Chapter 4: Channel Configuration, Data, and Status 33Stop on Limit: (Configuration Bit 9)This bit, when set, will hold the counter output at its limit

34 SLC 500™ 50 KHz Counter / Flowmeter ModuleCounter Roll Under: (Configuration Bit 14)When the counter rolls under zero it can continue to count down

Chapter 4: Channel Configuration, Data, and Status 35Note: In extended count mode (counts up to +/- 8M) the preset will bemultiplied by 256 internally

36 SLC 500™ 50 KHz Counter / Flowmeter ModuleRate Limit / R Factor:The rate limit function is used in the Normal operation mode. The RateLimit repr

Chapter 4: Channel Configuration, Data, and Status 37Input Registers -Channel DataThe channel data consists of 4 words, the lower counter data value,

38 SLC 500™ 50 KHz Counter / Flowmeter ModuleCounter Output Register, Low word:This output data register contains the lower word of the counteraccumul

Chapter 4: Channel Configuration, Data, and Status 39Check each inputchannel’sconfiguration and statusOutput Channel Status FlagsFigure 4.13 Counter O

40 SLC 500™ 50 KHz Counter / Flowmeter ModuleCounter Start/Stop Echo: (Status Bit 0)This bit echo’s the setting of the Counter Enable bit set in the

Chapter 4: Channel Configuration, Data, and Status 41Counter Zero Flag: (Status Bit 8)The flag is set when the counter counts down through zero. Refe

42 SLC 500™ 50 KHz Counter / Flowmeter Module

Programming / Application ExamplesLearning to configure your counter to meet your application requirementswill require knowledge of counter configurat

44 SLC 500™ 50 KHz Counter / Flowmeter Module0 Count 10,000Roll OverNote: If we change Configuration Bit 9 to 1 the counter will reach thelimit and th

Chapter 5: Ladder Program Examples 45SampleConfigurationSimple Ring Counterw/ Flags (20k Limit):This configuration for the counter module will allow t

46 SLC 500™ 50 KHz Counter / Flowmeter ModuleThe above figure illustrates counting in a clockwise direction.Using Preset Valueswith Extended ModeThe C

Chapter 5: Ladder Program Examples 47Rate Limit Flag = 10,000Hz * 2 = 20,000HzApplication:Meter ProvingThe 1746sc-CTR4/8 module provides a feature tha

48 SLC 500™ 50 KHz Counter / Flowmeter ModuleThe external enable line accommodates 5 Vdc, 12 Vdc and 24 Vdc signalsand is pulled low internally. The

Chapter 5: Ladder Program Examples 49In order to clear the factored data 0 must be loaded into the Preset / KFactor, Limit / M Factor and Limit / R Fa

ContentsOverview And Specifications... 7General Features And Benefits...

50 SLC 500™ 50 KHz Counter / Flowmeter Module

Testing Your ModuleRead this chapter to prevent potential problems in a systematic andcontrolled way. This chapter covers:• inspecting your module• di

52 SLC 500™ 50 KHz Counter / Flowmeter ModuleDisconnecting PrimeMoversBefore testing your module, ensure that machine motion will not occur:• Disconne

Chapter 6: Testing Your Module 53Interpreting The LEDIndicatorsYour module has nine LEDs: eight channel status LEDs (numbered 0–7for channels 0–7, res

54 SLC 500™ 50 KHz Counter / Flowmeter ModuleCodesI/O error codes appear in word S:6 of the SLC processor status file. Thefirst two digits of the erro

Chapter 6: Testing Your Module 55TroubleshootingFigure 6.2. Problem resolution flowchartModuleStatus LED(s)off.Module faultcondition.Check to seethat

56 SLC 500™ 50 KHz Counter / Flowmeter ModuleModuleStatus LEDon.Both Count andFrequencyModes NotWorkingCounter Mode isnot working.Check K+MScaling Sta

Maintaining Your ModuleAnd Ensuring SafetyRead this chapter to familiarize yourself with:• preventive maintenance• safety considerationsThe National F

58 SLC 500™ 50 KHz Counter / Flowmeter Input ModuleStanding Clear Of Machinery – When troubleshooting a problem withany SLC 500 system, have all perso

Floating Point Rate ModeRead this appendix to:• configure rate for floating point mode• read input words to get data• use ladder logic to create float

Check each outputchannel’sconfiguration and status...

60 SLC 500™ 50 KHz Counter / Flowmeter ModuleInput Registers - ChannelDataThe channel data consists of 4 words, the lower counter data value, therate

Appendix A: Floating Point Rate Mode 61Setting the Rate Limit / RFactor:The R Factor function is used to activate the floating point mode. Settingth

62 SLC 500™ 50 KHz Counter / Flowmeter ModuleModule status:Status remains the same as other modes. Information may be found inChapter 4.Ladder LogicI

Appendix A: Floating Point Rate Mode 63

64 SLC 500™ 50 KHz Counter / Flowmeter Module

Getting TechnicalAssistanceIf you need technical assistance, please review the information in Chapter6, “Testing Your Module,” before calling your loc

The ENCOMPASS logo and SLC 500 are trademarks of Allen-Bradley Company, Inc. Copyright © 2000-2004, Spectrum Controls, Inc.All rights reserved. Print

Overview And SpecificationsThe 1746sc-CTR4 and the 1746sc-CTR8 are 4 and 8 channel Counter/Flow Meter modules. The modules are suitable for general p

8 SLC 500™ 50 KHz Counter / Flowmeter Input ModuleIncreased Accuracy and ReliabilityThe counter module offers ±1 count accuracy and ±1% or betterfrequ

Chapter 1: Overview And Specifications 9 Vmax 75V Input impedance 25K ohmsInput Filter Digital Filter 50kHz (Default) Digital Filter 3