CompactRIO cRIO-9066/cRIO-9067 Operating Instructions
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© National Instruments
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17
Note
If the cRIO-906
x
is not in a hazardous location, you can connect and
disconnect USB devices without affecting operation.
Using the File System
The file system of the cRIO-906
x
follows conventions established for UNIX-style operating
systems. Other LabVIEW Real-Time targets follow Microsoft Windows-style conventions. To
port applications from those targets, this target supports the Windows-style
/C
home directory.
Various LabVIEW Real-Time system files which would be accessible from
C:
(or
/C
) on other
LabVIEW Real-Time targets are found in different locations on this target.
UNIX-style file systems support the concept of a symbolic link, which allows access to a file
using an alternative file path. For example, it is possible to link
/C/ni-rt/system
, where
dynamic libraries are deployed on other LabVIEW Real-Time targets, to
/usr/local/lib
,
where they are stored on the cRIO-906
x
, if the application requires this. The target ships with a
link from
/C/ni-rt/startup
, which is the location on other LabVIEW Real-Time targets for
startup applications, to the
/home/lvuser/natinst/bin
, which is the default location for
startup applications on the cRIO-906x.
For more information, visit
ni.com/info
and enter the Info Code
RT_Paths
.
Using the Internal Real-Time Clock
The system clock of the cRIO-906
x
is synchronized with the internal high-precision real-time
clock at startup. This synchronization provides timestamp data to the controller. Refer to the
specification in the
section for the accuracy
specifications of the real-time clock.
Understanding LED Indications
Figure 15.
cRIO-906
x
LEDs
POWER LED
The POWER
LED lights up while the cRIO-906
x
is powered on. This LED indicates that the
power supply connected to the chassis
is adequate.
POWER
STATUS
USER1
USER FPGA1