internal real-time clock at startup. You can set the real-time clock using the BIOS setup utility
or MAX, or you can set the clock programmatically using LabVIEW.
Refer to the specifications on
for the real-time clock accuracy specifications.
CMOS Battery
The cRIO-9031 contains a CMOS battery. The CMOS battery is a lithium cell battery that
stores the system clock information when the cRIO-9031 is powered off. There is only a slight
drain on the CMOS battery when power is applied to the cRIO-9031 power connector. The
rate at which the CMOS battery drains when power is disconnected depends on the ambient
storage temperature. For longer battery life, store the cRIO-9031 at a cooler temperature and
apply power to the power connector. Refer to the specifications on
for the
expected battery lifetime.
The
CMOS BATTERY IS DEAD
warning appears onscreen during the power-on self test if the
battery is dead. The cRIO-9031 still starts, but the system clock is reset to the date and time of
the BIOS release. The battery is not user-replaceable. If you need to replace the CMOS
battery, contact NI. Refer to the specifications on
for information about
battery disposal.
File System
LabVIEW mounts USB devices and SD cards to the
media/sdx1
directory and creates
symbolic links
/u
,
/v
,
/w
, or
/x
to the media mount point, starting with
/u
if it is available.
To prevent any file corruption to external storage devices, verify that any file IO operations
with the specific drive finish before removing the device. Refer to the
LabVIEW Help
for more
information.
The file system of the cRIO-9031 follows conventions established for UNIX-style operating
systems. Other LabVIEW Real-Time targets follow Microsoft Windows-style conventions. In
order to facilitate the porting of applications from those targets, this target supports the
Windows-style
/C
home directory. This path is bound to the UNIX-style directory
/home/
lvuser
.
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-9031, if the application requires this.
and enter the Info Code
RT_Paths
.
Installing the Module Immobilization Accessory
The Module Immobilization accessory, part number 158534-01, ensures that the C Series
module latches cannot be retracted and modules cannot be removed from a system. The
NI cRIO-9031 User Manual
|
© National Instruments
|
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