National Instruments NI 6612 Manuel utilisateur

PCIe-6612

NI 6612

User Manual

NI 6612 User Manual

November 2013

374008B-01

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Contents

About This Manual

Related Documentation .................................................................................................... xiii

Chapter 1

Introduction

Installation ........................................................................................................................ 1-1

Accessories and Cables .................................................................................................... 1-1

Chapter 2

Digital I/O

Digital Input Data Acquisition Methods .......................................................................... 2-3

Software-Timed Acquisitions................................................................................... 2-3

Hardware-Timed Acquisitions ................................................................................. 2-3

Digital Input Triggering.................................................................................................... 2-4

Digital Waveform Acquisition ......................................................................................... 2-5

DI Sample Clock Signal ........................................................................................... 2-5

Routing DI Sample Clock to an Output Terminal ............................................ 2-6

Other Timing Requirements ............................................................................. 2-6

DI Sample Clock Timebase Signal........................................................................... 2-6

DI Start Trigger Signal ..................................................................................... 2-7

Retriggerable DI ............................................................................................... 2-7

Using a Digital Source...................................................................................... 2-8

Routing DI Start Trigger to an Output Terminal .............................................. 2-8

DI Reference Trigger Signal..................................................................................... 2-8

Using a Digital Source...................................................................................... 2-9

Routing DI Reference Trigger Signal to an Output Terminal .......................... 2-9

DI Pause Trigger Signal ........................................................................................... 2-9

Using a Digital Source...................................................................................... 2-10

Routing DI Pause Trigger Signal to an Output Terminal ................................. 2-10

Digital Output Data Generation Methods......................................................................... 2-10

Software-Timed Generations.................................................................................... 2-10

Hardware-Timed Generations .................................................................................. 2-11

Digital Output Triggering................................................................................................. 2-12

Digital Waveform Generation .......................................................................................... 2-12

DO Sample Clock Signal.......................................................................................... 2-13

Routing DO Sample Clock to an Output Terminal .......................................... 2-13

Other Timing Requirements ............................................................................. 2-13

DO Sample Clock Timebase Signal ......................................................................... 2-13

DO Start Trigger Signal............................................................................................ 2-14

Retriggerable DO.............................................................................................. 2-14

Using a Digital Start Trigger ............................................................................ 2-14

Routing DO Start Trigger Signal to an Output Terminal ................................. 2-14

Contents

viii |ni.com

DO Pause Trigger Signal ..........................................................................................2-15

Using a Digital Pause Trigger........................................................................... 2-15

Routing DO Pause Trigger Signal to an Output Terminal................................2-15

I/O Protection....................................................................................................................2-16

DI Change Detection ........................................................................................................ 2-16

DI Change Detection Applications ...........................................................................2-17

Digital Filtering................................................................................................................. 2-17

Connecting Digital I/O Signals......................................................................................... 2-20

Getting Started with DIO Applications in Software .........................................................2-21

Signal Integrity Considerations ........................................................................................2-22

Chapter 3

Counters

Counter Input Applications............................................................................................... 3-2

Edge Counting .......................................................................................................... 3-2

Channel Settings ............................................................................................... 3-2

Timing Settings.................................................................................................3-3

Trigger Settings................................................................................................. 3-4

Other Settings ................................................................................................... 3-6

Exporting a Terminal Count Signal .................................................................. 3-6

Cascading Counters .......................................................................................... 3-6

Pulse Measurement ................................................................................................... 3-6

Create Channel.................................................................................................. 3-7

Channel Settings ............................................................................................... 3-7

Timing Settings.................................................................................................3-8

Trigger Settings................................................................................................. 3-9

Other Settings ................................................................................................... 3-10

Semi-Period Measurement........................................................................................ 3-10

Settings.............................................................................................................. 3-10

Frequency Measurement........................................................................................... 3-11

Frequency Measurement Considerations.......................................................... 3-11

Frequency Measurement Methods.................................................................... 3-12

Period Measurement .................................................................................................3-19

Pulse-Width Measurement........................................................................................ 3-19

Channel Settings ............................................................................................... 3-20

Timing Settings.................................................................................................3-20

Trigger Settings................................................................................................. 3-21

Other Settings ................................................................................................... 3-22

Two-Edge Separation ...............................................................................................3-22

Channel Settings ............................................................................................... 3-23

Timing Settings.................................................................................................3-23

Trigger Settings................................................................................................. 3-24

Other Settings ................................................................................................... 3-25

NI 6612 User Manual

Quadrature and Two-Pulse Encoder Overview ........................................................ 3-25

Quadrature Encoders ........................................................................................ 3-25

Two-Pulse Encoders ......................................................................................... 3-27

Angular Position Measurement ................................................................................ 3-27

Create Channel ................................................................................................. 3-27

Channel Settings ............................................................................................... 3-27

Timing Settings................................................................................................. 3-28

Trigger Settings ................................................................................................ 3-29

Other Settings ................................................................................................... 3-29

Linear Position Measurement................................................................................... 3-29

Counter Output Applications............................................................................................ 3-29

Generating a Series of One or More Pulses.............................................................. 3-30

Create Channel ................................................................................................. 3-30

Channel Settings ............................................................................................... 3-31

Timing Settings................................................................................................. 3-31

Triggering Setting............................................................................................. 3-31

Generating a Waveform with Constant Frequency and Duty Cycle ........................ 3-32

Create Channel ................................................................................................. 3-32

Channel Settings ............................................................................................... 3-33

Timing Settings................................................................................................. 3-33

Triggering Setting............................................................................................. 3-33

Generating a Waveform with Variable Frequency and Duty Cycle......................... 3-34

Create Channel ................................................................................................. 3-34

Channel Settings ............................................................................................... 3-35

Timing Settings................................................................................................. 3-35

Triggering Settings ........................................................................................... 3-35

Buffer Considerations....................................................................................... 3-35

Generating Complex Digital Waveform or Timing Pattern ..................................... 3-36

Create Channel ................................................................................................. 3-36

Channel Settings ............................................................................................... 3-36

Timing Settings................................................................................................. 3-37

Triggering Setting............................................................................................. 3-37

Buffer Considerations....................................................................................... 3-37

Other Features........................................................................................................... 3-37

Frequency Division........................................................................................... 3-37

Frequency Generator ................................................................................................ 3-38

Chapter 4

PFI

Using PFI Terminals as Timing Input Signals ................................................................. 4-2

Exporting Timing Output Signals Using PFI Terminals .................................................. 4-2

Using PFI Terminals as Static Digital I/Os ...................................................................... 4-3

Using PFI Terminals to Digital Detection Events ............................................................ 4-3

Connecting PFI Input Signals........................................................................................... 4-3

PFI Filters ......................................................................................................................... 4-3

Contents

x|ni.com

I/O Protection....................................................................................................................4-5

Signal Integrity Considerations ........................................................................................4-5

Chapter 5

Counter Signal Routing and Clock Generation

Clock Routing ...................................................................................................................5-1

100 MHz Timebase...................................................................................................5-2

20 MHz Timebase..................................................................................................... 5-2

100 kHz Timebase .................................................................................................... 5-2

External Reference Clock .........................................................................................5-2

10 MHz Reference Clock ......................................................................................... 5-3

PXIe_CLK100 (NI PXIe-6612 Only).......................................................................5-3

PXIe_SYNC100 (NI PXIe-6612 Only) ....................................................................5-3

PXI_CLK10 (NI PXIe-6612 Only)...........................................................................5-3

Default Routing.................................................................................................................5-3

Routing Options ................................................................................................................ 5-5

Matching Routing Terminology ....................................................................................... 5-5

Synchronizing Multiple Devices ......................................................................................5-6

PXI Express Devices ................................................................................................ 5-6

PCI Express Devices.................................................................................................5-7

Real-Time System Integration (RTSI).............................................................................. 5-7

Using RTSI as Outputs .............................................................................................5-8

Using RTSI Terminals as Timing Input Signals....................................................... 5-8

RTSI Filters............................................................................................................... 5-9

PXI Trigger Signals (NI PXIe-6612 Only).......................................................................5-9

PXI_Trigger<0..7>.................................................................................................... 5-9

PXI_STAR................................................................................................................ 5-9

PXIe-DSTAR<A..C>................................................................................................ 5-10

Chapter 6

Bus Interface

Data Transfer Methods ..................................................................................................... 6-1

PCI Express/PXI Express Device Data Transfer Methods .......................................6-1

PXI Express Considerations ............................................................................................. 6-2

PXI Express Clock and Trigger Signals ................................................................... 6-2

PXI Express .............................................................................................................. 6-2

Chapter 7

Calibration

Appendix A

Pinout and Signal Descriptions

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