Programming instructions

Chapter 5 Things You Should Know about Analog Input
© National Instruments Corporation 5-17 LabVIEW Data Acquisition Basics Manual
You refer to AMUX-64T channels only when a single AMUX-64T channel
comprises the entire list. Otherwise, you refer to them indirectly through
the device channels that you use to scan the AMUX-64T channels. Refer to
Appendix B,
Hardware Capabilities
, of the
LabVIEW Function and VI
Reference Manual
, or the LabVIEW
Online Reference
, available by
selecting
Help»Online Reference…
, for more information on addressing
AMUX-64T channels.
Refer to the
AMUX-64T User Manual
for more information on the external
multiplexer device.
Important Terms You Should Know
The following are some definitions of common terms and parameters that
you should remember when acquiring your data.
•A
scan
is one acquisition or reading from each channel in your channel
string.
•
Number of scans to acquire
refers to the number of data acquisitions
or readings to acquire from each channel in the channel string.
Number of samples
is the number of data points you want to sample
from each channel.
•The
scan rate
determines how many times per second LabVIEW
acquires data from channels.
scan rate
enables
interval scanning
(a longer interval between scans than between individual channels
comprising a scan) on devices that support this feature.
channel clock
rate
defines the time between the acquisition of consecutive channels
in your channel string. For more information on scan and channel
clock rates, refer to Chapter 9,
Letting an Outside Source Control Your
Acquisition Rate
.
For specific information about the Analog Input VIs, refer to Chapter 14,
Introduction to the LabVIEW Data Acquisition VIs
, in the
LabVIEW
Function and VI Reference Manual
, or to the LabVIEW
Online Reference
,
available by selecting
Help»Online Reference….
Channel List Parameter Channel Specified
AMy!x Channel x on AMUX-64T device
y
.
AM4!8 Channel 8 on AMUX-64T device 4.