National Instruments DAQ S Chapter 6 Digital I/O, Chapter 7 Counters

Contents
© National Instruments Corporation vii NI 6124/6154 User Manual
Other Timing Requirements..............................................................5-7
AO Sample Clock Timebase Signal................................................................5-8
AO Start Trigger Signal...................................................................................5-9
Using a Digital Source......................................................................5-9
Using an Analog Source...................................................................5-10
Routing AO Start Trigger Signal to an Output Terminal..................5-10
AO Pause Trigger Signal.................................................................................5-10
Using a Digital Source......................................................................5-11
Using an Analog Source...................................................................5-11
Getting Started with AO Applications in Software.......................................................5-11
Chapter 6
Digital I/O
Digital I/O for Non-Isolated Devices.............................................................................6-1
Static DIO for Non-Isolated Devices..............................................................6-2
Digital Waveform Triggering for Non-Isolated Devices................................ 6-3
Digital Waveform Acquisition for Non-Isolated Devices...............................6-3
DI Sample Clock Signal....................................................................6-4
Digital Waveform Generation for Non-Isolated Devices................................6-5
DO Sample Clock Signal..................................................................6-5
I/O Protection for Non-Isolated Devices.........................................................6-7
Programmable Power-Up States for Non-Isolated Devices............................6-7
DI Change Detection for Non-Isolated Devices..............................................6-8
DI Change Detection Applications for Non-Isolated Devices..........6-9
Connecting Digital I/O Signals on Non-Isolated Devices...............................6-9
Getting Started with DIO Applications in Software on Non-Isolated Devices.....6-10
Digital I/O for Isolated Devices.....................................................................................6-11
Static DIO for Isolated Devices.......................................................................6-11
I/O Protection for Isolated Devices.................................................................6-12
Connecting Digital I/O Signals on Isolated Devices.......................................6-12
Getting Started with DIO Applications in Software on Isolated Devices.......6-13
Chapter 7
Counters
Counter Input Applications............................................................................................7-2
Counting Edges...............................................................................................7-2
Single Point (On-Demand) Edge Counting......................................7-2
Buffered (Sample Clock) Edge Counting......................................... 7-3
Controlling the Direction of Counting..............................................7-4
Pulse-Width Measurement..............................................................................7-4
Single Pulse-Width Measurement.....................................................7-4
Buffered Pulse-Width Measurement.................................................7-5