National Instruments NI 6612 User manual

PCIe-6612

NI 6612
User Manual
NI 6612 User Manual
November 2013
374008B-01

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© National Instruments |vii
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
© National Instruments |ix
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