System settings
1
1.1 Delivery condition of the system
Scope of validity
This document is valid for all systems that are supplied with Linux as operating system on the
CompactFlash Card, such as all NCUs of the type NCU 7x0.3B PN.
Directories on the CompactFlash Card
A Linux partition as well as a FAT partition are available on the CompactFlash Card. The
memory space of the CompactFlash Card is occupied mainly by the Linux-EXT3 partition
containing the system software and the user data. A 2 MB large FAT partition still exists but
only for internal administration purposes.
When the system is in operation, the following directories (this is a selection and not a complete
list) are available in the EXT3 partition on the CompactFlash Card:
Directory Use
/siemens Reserved for Siemens system software
/addon Reserved for Siemens add-on software
/oem Additional software and configurations of the machine manufacturer
/user
● Storage of user data
● Configuring the HMI application
● Data that is created when commissioning the system using the HMI
application.
/system Linux operating system
/user/system/etc File basesys.ini (modifications possible)
/user/common/tcu TCU configuration files
/var/log/messages System log file (same as event.log under Windows)
Note
Files in the directory under /user always have priority over files with the same name in the
directory /oem → /addon → /siemens.
NCU operating system
Commissioning Manual, 12/2017, 6FC5397-1DP40-6BA1 5
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