National Instruments Module SCXI-1125 - Manual (Page 81)

Appendix B Using SCXI Channel Strings with Traditional NI-DAQ (Legacy) 7.0 or Later
SCXI-1125 User Manual B-2 ni.com
channels is the list of channels that are scanned for module z . It can have
several formats:
• ob x ! scy ! mdz ! nx , where nx is a single input channel.
• ob x ! scy ! mdz ! (n0, n2) , where n0, n2 are individual input
channel that are not necessarily sequential.
• ob x ! scy ! mdz ! n0:n3 , where n0 and n3 represent an ascending
sequential list of input channels, inclusive.
• ob x ! scy ! mdz ! (n0, n2, n3:n4, n1, n5, n2) , where
n0 , n2 , and n5 represent single channels, not necessarily sequential,
and n3 and n4 represent the endpoints of an ascending sequential list
of channels, inclusive. In this case, channels n1 and n2 are explicitly
repeated in the channel list.
Notes Using parenthesis surrounding multiple channels in a channel string is important
for correct scanning operation of the SCXI channels.
In a single-chassis system, the
ob x ! specifier is optional and causes the gains on the
module and E/M Series DAQ device to be automatically set to fit the input limits
parameter. When this specifier is omitted, the default gain on the E/M Series DAQ device,
usually the lowest gain, is used, but the SCXI-1125 gain is adjusted to fit the input limits.
NI recommends using the
ob x ! specifier.
Repeating channels or having channels out of sequence in a scan list is not supported on
all SCXI modules. Refer to the manual of each module for information on this feature,
which is referred to as flexible scanning or random scanning.
For more information about using SCXI channel string, refer to the
LabVIEW Measurements Manual and SCXI-1125 shipping examples.