User`s manual

UC-7400-CE User’s Manual Introduction
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Supporting Servers and Daemons
In addition to the development and communication capability, UC-7400-CE embeds the services
and daemons as stated next. These common and easy-to-use application servers help users to
migrate the UC-7400-CE embedded computer to the industrial communication application very
easily and conveniently.
y Telnet Server - A sample server that allows remote administration through a standard telnet
client.
y FTP Server - A sample server used for transferring files to and from remote computer
systems over a network using TCP/IP.
y Web Server (HTTPD) - Includes ASP, ISAPI Secure Socket Layer support, SSL 2, SSL 3,
and Transport Layer Security (TLS/SSL 3.1) public key-based protocols, and Web
Administration ISAPI Extensions.
y Dial-up Networking - Consists of RAS client API and the Point to Point Protocol (PPP).
RAS and PPP support Extensible Authentication Protocol (EAP) and RAS scripting.
Learning Firmware Build Versions
There are three ways to obtain the firmware version of the UC-7400-CE computer. This
information is particularly important for the purpose of feature identification.
y Examine the welcome message after you logon the computer.
y Logon the Web-based management system (described in a later chapter) to view the system
information.
In addition, for a UC-7420-CE or UC-7410, you can obtain the firmware version by pressing
function key F1 and then examining this information on the LCM display.
Memory and File Systems
From the 128M bytes of SDRAM space, the main memory has a capacity of about 112M bytes in
which the operating system and user applications run. The kernel image occupies the rest of the
space.
The internal file system in the UC-7400-CE computer controls access to ROM and also provides
file storage in the object store, which is in the RAM. The ROM file system provides persistent
storage for applications and their related data even when the main power supply is lost. It
integrates the read-only files that are stored in Flash ROM with the read/write files of both an
application and a user. In the UC-7400-CE computer, a child directory named “NORFlash” under
the root indicates the ROM storage of the flash memory of size 15.5M bytes.
The root directory is a RAM file system of size 15.5M bytes. It can be used for storing temporary
files for your applications. However, do not place persistent files or applications in the root
directory because they will be wiped out when the system is shutdown. Instead, place them under
the directory “NORFlash”.
The internal file system supports TFAT (Transaction-Safe File Allocation Table), which is a safer
mechanism than FAT. TFAT protects the file system from write corruption in critical times such
as power loss. During power loss, the file state is rolled back. In addition, TFAT is a superset of
FAT. This means that the internal file system of the computer provides the ability to mount
external FAT file systems.
The additional file systems on USB and CompactFlash storage devices are placed at the root of the
internal file system. If you intend to use these devices to port data between your PC and the
UC-7400-CE computer, please format them as the FAT file system on your PC. These devices
need to be formatted as FAT as otherwise the PC may not recognize the TFAT format.