National-instruments Network Device DAQ S Manual do Utilizador

DAQ S SeriesNI 6124/6154 User ManualDAQ-STC2 S Series Simultaneous Sampling Multifunction Input/Output DevicesNI 6124/6154 User ManualAugust 200837261

ContentsNI 6124/6154 User Manual x ni.comReal-Time System Integration (RTSI) ...

Chapter 7 CountersNI 6124/6154 User Manual 7-28 ni.comCounter n Aux SignalThe Counter n Aux signal indicates the first edge in a two-signal edge-separ

Chapter 7 Counters© National Instruments Corporation 7-29 NI 6124/6154 User ManualCounter n Up_Down SignalCounter n Up_Down is another name for the Co

Chapter 7 CountersNI 6124/6154 User Manual 7-30 ni.comWith pulse or pulse train generation tasks, the counter drives the pulse(s) on the Counter n Int

Chapter 7 Counters© National Instruments Corporation 7-31 NI 6124/6154 User ManualCounter TriggeringCounters support three different triggering action

Chapter 7 CountersNI 6124/6154 User Manual 7-32 ni.comOther Counter FeaturesCascading CountersYou can internally route the Counter n Internal Output a

Chapter 7 Counters© National Instruments Corporation 7-33 NI 6124/6154 User ManualThe filter setting for each input can be configured independently. O

Chapter 7 CountersNI 6124/6154 User Manual 7-34 ni.comFigure 7-31. PrescalingPrescaling is intended to be used for frequency measurement where the me

Chapter 7 Counters© National Instruments Corporation 7-35 NI 6124/6154 User ManualExample Application That Works Correctly (No Duplicate Counting)Figu

Chapter 7 CountersNI 6124/6154 User Manual 7-36 ni.comExample Application That Works Incorrectly (Duplicate Counting)In Figure 7-33, after the first r

Chapter 7 Counters© National Instruments Corporation 7-37 NI 6124/6154 User ManualEven if the Source pulses are long, the counter increments only once

© National Instruments Corporation xi NI 6124/6154 User ManualAbout This ManualThe NI 6124/6154 User Manual contains information about using the Natio

Chapter 7 CountersNI 6124/6154 User Manual 7-38 ni.comIn DAQmx, the device uses 80 MHz source mode if you perform the following:• Perform a position m

Chapter 7 Counters© National Instruments Corporation 7-39 NI 6124/6154 User ManualOther Internal Source ModeIn other internal source mode, the device

© National Instruments Corporation 8-1 NI 6124/6154 User Manual8Programmable Function Interfaces (PFI)Refer to one of the following sections, dependin

Chapter 8 Programmable Function Interfaces (PFI)NI 6124/6154 User Manual 8-2 ni.comEach PFI input also has a programmable debouncing filter. Figure 8-

Chapter 8 Programmable Function Interfaces (PFI)© National Instruments Corporation 8-3 NI 6124/6154 User ManualFigure 8-2 shows the circuitry of one P

Chapter 8 Programmable Function Interfaces (PFI)NI 6124/6154 User Manual 8-4 ni.comUsing PFI Terminals as Timing Input SignalsUse PFI terminals to rou

Chapter 8 Programmable Function Interfaces (PFI)© National Instruments Corporation 8-5 NI 6124/6154 User Manual• AO Start Trigger (ao/StartTrigger)• C

Chapter 8 Programmable Function Interfaces (PFI)NI 6124/6154 User Manual 8-6 ni.comConnecting PFI Input SignalsAll PFI input connections are reference

Chapter 8 Programmable Function Interfaces (PFI)© National Instruments Corporation 8-7 NI 6124/6154 User ManualAssume that an input terminal has been

Chapter 8 Programmable Function Interfaces (PFI)NI 6124/6154 User Manual 8-8 ni.comI/O ProtectionEach DIO and PFI signal is protected against overvolt

About This ManualNI 6124/6154 User Manual xii ni.comRelated DocumentationEach application software package and driver includes information about writi

Chapter 8 Programmable Function Interfaces (PFI)© National Instruments Corporation 8-9 NI 6124/6154 User Manual• NI 6154 Devices—By default, the digit

© National Instruments Corporation 9-1 NI 6124/6154 User Manual9Digital Routing and Clock GenerationThe digital routing circuitry has the following ma

Chapter 9 Digital Routing and Clock GenerationNI 6124/6154 User Manual 9-2 ni.com80 MHz TimebaseThe 80 MHz Timebase can be used as the Source input to

Chapter 9 Digital Routing and Clock Generation© National Instruments Corporation 9-3 NI 6124/6154 User Manual10 MHz Reference ClockThe 10 MHz referenc

Chapter 9 Digital Routing and Clock GenerationNI 6124/6154 User Manual 9-4 ni.comReal-Time System Integration (RTSI)Real-Time System Integration (RTSI

Chapter 9 Digital Routing and Clock Generation© National Instruments Corporation 9-5 NI 6124/6154 User ManualFigure 9-2. S Series PCI Device RTSI Pin

Chapter 9 Digital Routing and Clock GenerationNI 6124/6154 User Manual 9-6 ni.com• Counter n Source, Gate, Z, Internal Output• Change Detection Event•

Chapter 9 Digital Routing and Clock Generation© National Instruments Corporation 9-7 NI 6124/6154 User ManualThe following is an example of low to hig

Chapter 9 Digital Routing and Clock GenerationNI 6124/6154 User Manual 9-8 ni.comRefer to the KnowledgeBase document, Digital Filtering with M Series

Chapter 9 Digital Routing and Clock Generation© National Instruments Corporation 9-9 NI 6124/6154 User ManualAn S Series device receives the Star Trig

About This Manual© National Instruments Corporation xiii NI 6124/6154 User Manual• VI and Function Reference»Measurement I/O VIs and Functions—Describ

Chapter 9 Digital Routing and Clock GenerationNI 6124/6154 User Manual 9-10 ni.comThe filter setting for each input can be configured independently. O

© National Instruments Corporation 10-1 NI 6124/6154 User Manual10Bus InterfaceEach S Series device is designed on a complete hardware architecture th

Chapter 10 Bus InterfaceNI 6124/6154 User Manual 10-2 ni.comData Transfer MethodsThere are three primary ways to transfer data across the PCI bus are

© National Instruments Corporation 11-1 NI 6124/6154 User Manual11TriggeringA trigger is a signal that causes a device to perform an action, such as s

Chapter 11 TriggeringNI 6124/6154 User Manual 11-2 ni.comFigure 11-1 shows a falling-edge trigger.Figure 11-1. Falling-Edge TriggerYou can also progr

Chapter 11 Triggering© National Instruments Corporation 11-3 NI 6124/6154 User ManualAnalog Input Channel(NI 6124 Only) You can select any analog inpu

Chapter 11 TriggeringNI 6124/6154 User Manual 11-4 ni.comIn below-level analog triggering mode, shown in Figure 11-3, the trigger is generated when th

Chapter 11 Triggering© National Instruments Corporation 11-5 NI 6124/6154 User ManualFor the trigger to assert, the signal must first be below the low

Chapter 11 TriggeringNI 6124/6154 User Manual 11-6 ni.com• Analog Window Triggering—An analog window trigger occurs when an analog signal either passe

© National Instruments Corporation A-1 NI 6124/6154 User ManualADevice-Specific InformationThis appendix includes device-specific information about th

About This ManualNI 6124/6154 User Manual xiv ni.comTo create an application in Visual C++, Visual C#, or Visual Basic .NET, follow these general step

Appendix A Device-Specific InformationNI 6124/6154 User Manual A-2 ni.comNote The AO channels do not have analog or digital filtering hardware and do

Appendix A Device-Specific Information© National Instruments Corporation A-3 NI 6124/6154 User ManualNote For more information about default NI-DAQmx

Appendix A Device-Specific InformationNI 6124/6154 User Manual A-4 ni.comNI 6124 Block DiagramFigure A-2 shows the NI 6124 block diagram.Figure A-2.

Appendix A Device-Specific Information© National Instruments Corporation A-5 NI 6124/6154 User ManualUsing BNCsYou can connect BNC cables to your DAQ

Appendix A Device-Specific InformationNI 6124/6154 User Manual A-6 ni.comMating connectors and a backshell kit for making custom 68-pin cables are ava

Appendix A Device-Specific Information© National Instruments Corporation A-7 NI 6124/6154 User ManualNI 6154The NI 6154 is an isolated Plug-and-Play m

Appendix A Device-Specific InformationNI 6124/6154 User Manual A-8 ni.comNI 6154 I/O Connector PinoutFigure A-3 shows the pin assignments for the 37-p

Appendix A Device-Specific Information© National Instruments Corporation A-9 NI 6124/6154 User ManualNote For more information about default NI-DAQmx

Appendix A Device-Specific InformationNI 6124/6154 User Manual A-10 ni.comNI 6154 Block DiagramFigure A-4 shows the NI 6154 block diagram.Figure A-4.

Appendix A Device-Specific Information© National Instruments Corporation A-11 NI 6124/6154 User Manual• CB-37FH—37-pin screw terminal block, horizonta

About This Manual© National Instruments Corporation xv NI 6124/6154 User ManualDevice Documentation and SpecificationsThe NI 6124 Specifications and N

Appendix A Device-Specific InformationNI 6124/6154 User Manual A-12 ni.comThe non-isolated ground is connected to the chassis ground of the PC or chas

Appendix A Device-Specific Information© National Instruments Corporation A-13 NI 6124/6154 User Manual• Improved accuracy—Isolation improves measureme

© National Instruments Corporation B-1 NI 6124/6154 User ManualBTechnical Support and Professional ServicesVisit the following sections of the award-w

Appendix B Technical Support and Professional ServicesNI 6124/6154 User Manual B-2 ni.com• Declaration of Conformity (DoC)—A DoC is our claim of compl

© National Instruments Corporation G-1 NI 6124/6154 User ManualGlossarySymbol Prefix Valueppico10–12nnano10–9μ micro 10–6m milli 10–3k kilo 103Mmega10

GlossaryNI 6124/6154 User Manual G-2 ni.comADC Analog-to-digital converter—an electronic device, often an integrated circuit, that converts an analog

Glossary© National Instruments Corporation G-3 NI 6124/6154 User Manualchannel 1. Physical—a terminal or pin at which you can measure or generate an a

GlossaryNI 6124/6154 User Manual G-4 ni.comDD/A Digital-to-analog.DAC Digital-to-analog converter—an electronic device, often an integrated circuit, t

Glossary© National Instruments Corporation G-5 NI 6124/6154 User ManualDIP Dual inline package.DMA Direct memory access—a method by which data can be

GlossaryNI 6124/6154 User Manual G-6 ni.comFPGA Field-programmable gate array.Ggain The factor by which a signal is amplified, often expressed in dB.

© National Instruments Corporation 1-1 NI 6124/6154 User Manual1Getting StartedThe NI 6124 and NI 6154 are simultaneous sampling multifunction I/O dev

Glossary© National Instruments Corporation G-7 NI 6124/6154 User ManualMm Meter.master A functional part of a MXI/VME/VXIbus device that initiates dat

GlossaryNI 6124/6154 User Manual G-8 ni.compd Pull-down.PFI Programmable function interface.PGIA Programmable gain instrumentation amplifier.physical

Glossary© National Instruments Corporation G-9 NI 6124/6154 User ManualSs Seconds.S Samples.S/s Samples per second—used to express the rate at which a

GlossaryNI 6124/6154 User Manual G-10 ni.comtgwGate pulse width.THD Total harmonic distortion—the ratio of the total rms signal due to harmonic distor

Glossary© National Instruments Corporation G-11 NI 6124/6154 User ManualVILVolts, input low.VinVolts in.VmMeasured voltage.VOHVolts, output high.VOLVo

© National Instruments Corporation I-1 NI 6124/6154 User ManualIndexNumerics10 MHz reference clock, 9-3100 kHz Timebase, 9-220 MHz Timebase, 9-280 MHz

IndexNI 6124/6154 User Manual I-2 ni.comapplicationscounter input, 7-2counter output, 7-19edge counting, 7-2arm start trigger, 7-31Bblock diagramNI 61

Index© National Instruments Corporation I-3 NI 6124/6154 User ManualCounter n Source signal, 7-26Counter n TC signal, 7-29Counter n Up_Down signal, 7-

IndexNI 6124/6154 User Manual I-4 ni.comtriggering, 11-1waveform acquisition, 6-3waveform generation, 6-5digital I/O, 6-1block diagram, 6-2circuitry,

Index© National Instruments Corporation I-5 NI 6124/6154 User Manualfinite pulse train timing generation, 7-22FREQ OUT signal, 7-30frequencydivision,

Chapter 1 Getting StartedNI 6124/6154 User Manual 1-2 ni.comInstalling the HardwareThe DAQ Getting Started Guide contains non-software-specific inform

IndexNI 6124/6154 User Manual I-6 ni.comsingle pulse-width, 7-4single semi-period, 7-8single two-signal edge-separation, 7-18two-signal edge-separatio

Index© National Instruments Corporation I-7 NI 6124/6154 User Manualpower-up states, 6-7, 8-8, 8-9prescaling, 7-33programmablefunction interface (PFI)

IndexNI 6124/6154 User Manual I-8 ni.comsignalsAI Convert Clock, 4-16AI Convert Clock Timebase, 4-17AI Reference Trigger, 4-19AI Sample Clock, 4-14AI

Index© National Instruments Corporation I-9 NI 6124/6154 User Manualtraining and certification (NI resources), B-1transducers, 2-5triggerarm start, 7-

Chapter 1 Getting Started© National Instruments Corporation 1-3 NI 6124/6154 User ManualDevice PinoutsRefer to Appendix A, Device-Specific Information

© National Instruments Corporation 2-1 NI 6124/6154 User Manual2DAQ System OverviewFigure 2-1 shows a typical DAQ system setup, which includes transdu

SupportWorldwide Technical Support and Product Informationni.comNational Instruments Corporate Headquarters11500 North Mopac Expressway Austin, Texas

Chapter 2 DAQ System OverviewNI 6124/6154 User Manual 2-2 ni.comDAQ HardwareDAQ hardware digitizes signals, performs D/A conversions to generate analo

Chapter 2 DAQ System Overview© National Instruments Corporation 2-3 NI 6124/6154 User Manual(NI 6154 Only) S Series isolated hardware also includes ba

Chapter 2 DAQ System OverviewNI 6124/6154 User Manual 2-4 ni.com• Two flexible 32-bit counter/timer modules with hardware gating• Digital waveform acq

Chapter 2 DAQ System Overview© National Instruments Corporation 2-5 NI 6124/6154 User ManualExternal CalibrationExternal calibration is a process to a

Chapter 2 DAQ System OverviewNI 6124/6154 User Manual 2-6 ni.com• If you are using other application software, refer to Common Sensors in the NI-DAQmx

© National Instruments Corporation 3-1 NI 6124/6154 User Manual3I/O ConnectorThis chapter contains information about the S Series I/O connector. Refer

Chapter 3 I/O ConnectorNI 6124/6154 User Manual 3-2 ni.comNI 6154 I/O Connector Signal Descriptions(NI 6154 Only) Table 3-2 describes the signals foun

Chapter 3 I/O Connector© National Instruments Corporation 3-3 NI 6124/6154 User Manual+5 V Power Source(NI 6124 Only) The +5 V pins on the I/O connect

© National Instruments Corporation 4-1 NI 6124/6154 User Manual4Analog InputFigure 4-1 shows the analog input circuitry of each channel of the non-iso

Chapter 4 Analog InputNI 6124/6154 User Manual 4-2 ni.comOn S Series devices, each channel uses its own instrumentation amplifier, FIFO, multiplexer (

Important InformationWarrantyNI 6124 and NI 6154 devices are warranted against defects in materials and workmanship for a period of one year from the

Chapter 4 Analog Input© National Instruments Corporation 4-3 NI 6124/6154 User ManualCaution Exceeding the differential and common-mode input ranges d

Chapter 4 Analog InputNI 6124/6154 User Manual 4-4 ni.comWorking Voltage RangeOn most S Series devices, the PGIA operates normally by amplifying signa

Chapter 4 Analog Input© National Instruments Corporation 4-5 NI 6124/6154 User ManualHardware-timed acquisitions have several advantages over software

Chapter 4 Analog InputNI 6124/6154 User Manual 4-6 ni.comAnalog Input TriggeringAnalog input supports two different triggering actions: start and refe

Chapter 4 Analog Input© National Instruments Corporation 4-7 NI 6124/6154 User ManualRefer to the Analog Input Terminal Configuration section for desc

Chapter 4 Analog InputNI 6124/6154 User Manual 4-8 ni.comFigure 4-3. Differential Connection for Ground-Referenced Signals on Non-Isolated DevicesFig

Chapter 4 Analog Input© National Instruments Corporation 4-9 NI 6124/6154 User ManualWith these types of connections, the instrumentation amplifier re

Chapter 4 Analog InputNI 6124/6154 User Manual 4-10 ni.comFigure 4-5 shows a bias resistor connected between AI 0 – and the floating signal source gro

Chapter 4 Analog Input© National Instruments Corporation 4-11 NI 6124/6154 User Manual• High Source Impedance—For larger source impedances, this conne

Chapter 4 Analog InputNI 6124/6154 User Manual 4-12 ni.comMinimize noise pickup and maximize measurement accuracy by taking the following precautions.

ComplianceCompliance with FCC/Canada Radio Frequency Interference RegulationsDetermining FCC ClassThe Federal Communications Commission (FCC) has rul

Chapter 4 Analog Input© National Instruments Corporation 4-13 NI 6124/6154 User ManualAnalog Input Timing SignalsAn acquisition with posttrigger data

Chapter 4 Analog InputNI 6124/6154 User Manual 4-14 ni.comIf an AI Reference Trigger (ai/ReferenceTrigger) pulse occurs before the specified number of

Chapter 4 Analog Input© National Instruments Corporation 4-15 NI 6124/6154 User ManualSeveral other internal signals can be routed to AI Sample Clock

Chapter 4 Analog InputNI 6124/6154 User Manual 4-16 ni.comFigure 4-9 shows the relationship of AI Sample Clock to AI Start Trigger.Figure 4-9. AI Sam

Chapter 4 Analog Input© National Instruments Corporation 4-17 NI 6124/6154 User ManualUsing an Internal SourceOne of the following internal signals ca

Chapter 4 Analog InputNI 6124/6154 User Manual 4-18 ni.comAI Hold Complete Event SignalThe AI Hold Complete Event (ai/HoldCompleteEvent) signal genera

Chapter 4 Analog Input© National Instruments Corporation 4-19 NI 6124/6154 User ManualUsing an Analog SourceWhen you use an analog trigger source, the

Chapter 4 Analog InputNI 6124/6154 User Manual 4-20 ni.comWhen the reference trigger occurs, the DAQ device continues to write samples to the buffer u

Chapter 4 Analog Input© National Instruments Corporation 4-21 NI 6124/6154 User ManualGetting Started with AI Applications in SoftwareYou can use the

© National Instruments Corporation 5-1 NI 6124/6154 User Manual5Analog OutputFigure 5-1 shows the analog output circuitry of a non-isolated S Series (

© National Instruments Corporation v NI 6124/6154 User ManualContentsAbout This ManualConventions ...

Chapter 5 Analog OutputNI 6124/6154 User Manual 5-2 ni.comThe main blocks featured in the S Series analog output circuitry are as follows:• AO FIFO—Th

Chapter 5 Analog Output© National Instruments Corporation 5-3 NI 6124/6154 User Manual• Hardware-Timed Generations—With a hardware-timed generation, a

Chapter 5 Analog OutputNI 6124/6154 User Manual 5-4 ni.comWith FIFO regeneration, the entire buffer is downloaded to the FIFO and regenerated from the

Chapter 5 Analog Output© National Instruments Corporation 5-5 NI 6124/6154 User ManualFigure 5-3 shows how AO 0 and AO 1 are wired on a non-isolated S

Chapter 5 Analog OutputNI 6124/6154 User Manual 5-6 ni.comWaveform Generation Timing SignalsThere is one AO Sample Clock that causes all AO channels t

Chapter 5 Analog Output© National Instruments Corporation 5-7 NI 6124/6154 User ManualUsing an External SourceYou can use a signal connected to any PF

Chapter 5 Analog OutputNI 6124/6154 User Manual 5-8 ni.comFigure 5-7 shows the relationship of the AO Sample Clock signal to the AO Start Trigger sign

Chapter 5 Analog Output© National Instruments Corporation 5-9 NI 6124/6154 User ManualFigure 5-8 shows the timing requirements for the AO Sample Clock

Chapter 5 Analog OutputNI 6124/6154 User Manual 5-10 ni.comFigure 5-9 shows the timing requirements of the AO Start Trigger digital source.Figure 5-9.

Chapter 5 Analog Output© National Instruments Corporation 5-11 NI 6124/6154 User ManualUsing a Digital SourceTo use ao/Pause Trigger, specify a source

ContentsNI 6124/6154 User Manual vi ni.comConnecting Analog Input Signals...

© National Instruments Corporation 6-1 NI 6124/6154 User Manual6Digital I/ORefer to one of the following sections, depending on your device:• Digital

Chapter 6 Digital I/ONI 6124/6154 User Manual 6-2 ni.comFigure 6-1 shows the circuitry of one DIO line. Each DIO line is similar. The following sectio

Chapter 6 Digital I/O© National Instruments Corporation 6-3 NI 6124/6154 User ManualDigital Waveform Triggering for Non-Isolated Devices(NI 6124 Only)

Chapter 6 Digital I/ONI 6124/6154 User Manual 6-4 ni.comYou can configure each DIO line to be an output, a static input, or a digital waveform acquisi

Chapter 6 Digital I/O© National Instruments Corporation 6-5 NI 6124/6154 User Manual•PXI_STAR• Analog Comparison Event (an analog trigger)You can samp

Chapter 6 Digital I/ONI 6124/6154 User Manual 6-6 ni.comUsing an Internal SourceTo use DO Sample Clock with an internal source, specify the signal sou

Chapter 6 Digital I/O© National Instruments Corporation 6-7 NI 6124/6154 User ManualI/O Protection for Non-Isolated Devices(NI 6124 Only) Each DIO and

Chapter 6 Digital I/ONI 6124/6154 User Manual 6-8 ni.comDI Change Detection for Non-Isolated Devices(NI 6124 Only) You can configure the DAQ device to

Chapter 6 Digital I/O© National Instruments Corporation 6-9 NI 6124/6154 User ManualThe Change Detection Event signal also can be used to detect chang

Chapter 6 Digital I/ONI 6124/6154 User Manual 6-10 ni.comFigure 6-4. Digital I/O ConnectionsCautionExceeding the maximum input voltage ratings, which

Contents© National Instruments Corporation vii NI 6124/6154 User ManualOther Timing Requirements...

Chapter 6 Digital I/O© National Instruments Corporation 6-11 NI 6124/6154 User ManualDigital I/O for Isolated Devices(NI 6154 Only) S Series isolated

Chapter 6 Digital I/ONI 6124/6154 User Manual 6-12 ni.comI/O Protection for Isolated Devices(NI 6154 Only) Each DIO and PFI signal is protected agains

Chapter 6 Digital I/O© National Instruments Corporation 6-13 NI 6124/6154 User ManualFigure 6-6. Isolated S Series Device Digital I/O Signal Connecti

© National Instruments Corporation 7-1 NI 6124/6154 User Manual7CountersS Series devices have two general-purpose 32-bit counter/timers and one freque

Chapter 7 CountersNI 6124/6154 User Manual 7-2 ni.comThe counters have seven input signals, although in most applications only a few inputs are used.F

Chapter 7 Counters© National Instruments Corporation 7-3 NI 6124/6154 User ManualFigure 7-3. Single Point (On-Demand) Edge Counting with Pause Trigge

Chapter 7 CountersNI 6124/6154 User Manual 7-4 ni.comControlling the Direction of CountingIn edge counting applications, the counter can count up or d

Chapter 7 Counters© National Instruments Corporation 7-5 NI 6124/6154 User ManualFigure 7-5 shows an example of a single pulse-width measurement.Figur

Chapter 7 CountersNI 6124/6154 User Manual 7-6 ni.comcondition is not met, consider using duplicate count prevention, described in the Duplicate Count

Chapter 7 Counters© National Instruments Corporation 7-7 NI 6124/6154 User ManualBuffered Period MeasurementBuffered period measurement is similar to

ContentsNI 6124/6154 User Manual viii ni.comPeriod Measurement ...

Chapter 7 CountersNI 6124/6154 User Manual 7-8 ni.comYou can route an internal or external periodic clock signal (with a known period) to the Source i

Chapter 7 Counters© National Instruments Corporation 7-9 NI 6124/6154 User ManualFor information about connecting counter signals, refer to the Defaul

Chapter 7 CountersNI 6124/6154 User Manual 7-10 ni.comYou can configure the counter to make K + 1 buffered period measurements. Recall that the first

Chapter 7 Counters© National Instruments Corporation 7-11 NI 6124/6154 User ManualFigure 7-12 illustrates this method. Another option would be to meas

Chapter 7 CountersNI 6124/6154 User Manual 7-12 ni.comYou can route the signal to measure to the Source input of Counter 0, as shown in Figure 7-13. A

Chapter 7 Counters© National Instruments Corporation 7-13 NI 6124/6154 User Manual• Method 1 uses only one counter. It is a good method for many appli

Chapter 7 CountersNI 6124/6154 User Manual 7-14 ni.comTable 7-2 summarizes some of the differences in methods of measuring frequency.For information a

Chapter 7 Counters© National Instruments Corporation 7-15 NI 6124/6154 User ManualFigure 7-14 shows a quadrature cycle and the resulting increments an

Chapter 7 CountersNI 6124/6154 User Manual 7-16 ni.comChannel Z behavior—when it goes high and how long it stays high—differs with quadrature encoder

Chapter 7 Counters© National Instruments Corporation 7-17 NI 6124/6154 User ManualFor information about connecting counter signals, refer to the Defau

Contents© National Instruments Corporation ix NI 6124/6154 User ManualFrequency Output Signal...

Chapter 7 CountersNI 6124/6154 User Manual 7-18 ni.comYou can configure the rising or falling edge of the Aux input to be the active edge. You can con

Chapter 7 Counters© National Instruments Corporation 7-19 NI 6124/6154 User ManualFigure 7-21 shows an example of a buffered two-signal edge-separatio

Chapter 7 CountersNI 6124/6154 User Manual 7-20 ni.comFigure 7-22 shows a generation of a pulse with a pulse delay of four and a pulse width of three

Chapter 7 Counters© National Instruments Corporation 7-21 NI 6124/6154 User ManualYou can route the Start Trigger signal to the Gate input of the coun

Chapter 7 CountersNI 6124/6154 User Manual 7-22 ni.comYou also can use the Gate input of the counter as a Pause Trigger (if it is not used as a Start

Chapter 7 Counters© National Instruments Corporation 7-23 NI 6124/6154 User ManualFrequency GenerationYou can generate a frequency by using a counter

Chapter 7 CountersNI 6124/6154 User Manual 7-24 ni.comFrequency Output can be routed out to any PFI <0..15> or RTSI <0..7> terminal. All P

Chapter 7 Counters© National Instruments Corporation 7-25 NI 6124/6154 User ManualThe waveform thus produced at the counter’s output can be used to pr

Chapter 7 CountersNI 6124/6154 User Manual 7-26 ni.comCounter n Source SignalThe selected edge of the Counter n Source signal increments and decrement

Chapter 7 Counters© National Instruments Corporation 7-27 NI 6124/6154 User ManualRouting Counter n Source to an Output TerminalYou can route Counter