Programming instructions

Chapter 15 Things You Should Know about Digital I/O
LabVIEW Data Acquisition Basics Manual 15-2
© National Instruments Corporation
Types of Digital Acquisition/Generation
There are two types of digital acquisition/generation—
nonlatched
(or
immediate
) and
latched
(or
handshaked
). With nonlatched or
immediate digital I/O, your system updates the digital lines immediately.
Latched or handshaked digital I/O is when a device or module accepts or
transfers data after a digital pulse has been received. There are two types
of latched (handshaked) digital I/O: non-buffered and buffered. Not all
devices and modules support latched (handshaked) digital I/O. Refer to the
hardware tables in Appendix B,
Hardware Capabilities
, of the
LabVIEW
Function and VI Reference Manual
, your hardware manual, or refer to the
LabVIEW
Online Reference
, by selecting
Help»Online Reference…
, to
see if your device or module supports it.
For specific information about the Digital I/O VIs, refer to Chapter 14,
Introduction to the LabVIEW Data Acquisition VIs
, in the
LabVIEW
Function and VI Reference Manual,
or refer to the LabVIEW
Online
Reference
, by selecting
Help»Online Reference…
.