National Instruments NI VISION PCI-8254R - Manual (Page 6)

© National Instruments Corporation vii NI PCI-8254R User Manual
Contents
Chapter 1
Introduction
Software Overview ........................................................................................................1-1
Vision Builder for Automated Inspection .......................................................1-2
Vision Development Module ..........................................................................1-2
IEEE 1394 and NI 8254R ..............................................................................................1-3
Functional Overview......................................................................................................1-3
Start Conditions .............................................................................................................1-4
Acquisition Window Control.........................................................................................1-4
Chapter 2
Hardware Overview
Digital I/O ......................................................................................................................2-1
RIO and The LabVIEW FPGA Module ........................................................................2-1
TTL Inputs and Outputs.................................................................................................2-2
Isolated Inputs and Outputs ...........................................................................................2-3
I/O for Normal Operation ..............................................................................................2-4
Trigger Inputs ..................................................................................................2-5
Timed Pulse Output.........................................................................................2-5
Initiating a Timed Pulse ....................................................................2-5
Pulse Modes ......................................................................................2-6
Pulse Delay .......................................................................................2-6
Pulse Width .......................................................................................2-7
Trigger Polarity .................................................................................2-7
Trigger Change Detectors................................................................................2-8
Quadrature Encoder.........................................................................................2-8
Product Selection Port .....................................................................................2-8
Using ISO Input 5 as a Latch ............................................................2-9
General-Purpose I/O........................................................................................2-9
General-Purpose Inputs.....................................................................2-10
General-Purpose Outputs ..................................................................2-10
I/O for Fault Conditions ..................................................................................2-10
Shutdown ..........................................................................................2-11
Watchdog Timer ...............................................................................2-11