Moxa Technologies UC-7122 User manual

UC-7122/7124
User’s Manual
Second Edition, June 2008
www.moxa.com/product
©2008 Moxa Inc., all rights reserved.
Reproduction without permission is prohibited.

UC-7122/7124 User’s Manual
The software described in this manual is furnished under a license agreement and may be used only in
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Table of Contents
Chapter 1 Introduction..................................................................................................1-1
Overview.................................................................................................................................. 1-2
Model Descriptions and Package Checklist.................................................................. 1-2
UC-7122/7124 Features................................................................................................ 1-3
Hardware Specifications............................................................................................... 1-3
UC-7122/7124 Software .......................................................................................................... 1-4
Applications Development Environment...................................................................... 1-4
Networking and Communications Capabilities ............................................................ 1-5
Supported Servers and Daemons.................................................................................. 1-5
Obtaining the Firmware Build Version .................................................................................... 1-5
Memory and File Systems ....................................................................................................... 1-6
RAM File System ......................................................................................................... 1-6
Flash File System.......................................................................................................... 1-6
External File System..................................................................................................... 1-6
Cautions when Using File Systems .............................................................................. 1-6
Using a RAM File System instead of a Flash File System ........................................... 1-7
Hive-based Registry................................................................................................................. 1-7
Inserting an SD Card into the Computer.................................................................................. 1-7
Connecting a USB Mass Storage Device to the Computer ...................................................... 1-7
RS-232/422/485 Serial Ports.................................................................................................... 1-8
Chapter 2 Getting Started.............................................................................................2-1
Starting Your UC-7122/7124 Computer .................................................................................. 2-2
Resetting Your UC-7122/7124 Computer ................................................................................ 2-2
Operating Your UC-7122/7124 Computer through the Serial Console.................................... 2-3
Changing the Network Settings ............................................................................................... 2-3
Operating Your UC-7122/7124 Computer through a Telnet Client.......................................... 2-4
User/Group Management......................................................................................................... 2-5
System Time Management....................................................................................................... 2-6
Starting and Stopping Services ................................................................................................ 2-6
Troubleshooting Network Connectivity................................................................................... 2-6
Simple Network Management Protocol (SNMP)..................................................................... 2-7
Chapter 3 Web-based Management System...............................................................3-1
Logging onto the Web-based Management System ................................................................. 3-2
System Information.................................................................................................................. 3-2
Networking/Server Configuration............................................................................................ 3-3
Serial Port Configuration ......................................................................................................... 3-3
Monitoring and Controlling Services....................................................................................... 3-4
Monitoring and Controlling Processes (Threads) .................................................................... 3-5
Launching Processes Automatically ........................................................................................ 3-5
Appendix A Firmware Upgrade Procedure....................................................................A-1
Appendix B Frequently Asked Questions .....................................................................B-1

1
1
Chapter 1 Introduction
The UC-7122/7124 are pocket size embedded computers with 2 or 4 serial ports, dual 10/100
Mbps Ethernet, an SD socket, and a USB 2.0 host port. The UC-7122/7124 are ideal for front-end
device monitoring, data acquisition, and protocol conversion. Wide temperature models are also
available to provide reliable performance in harsh operating environments.
The RISC-based UC-7122/7124 embedded computers come with the Windows® CE operating
system pre-installed. Microsoft® Windows® CE 5.0 is an open, scalable, 32-bit operating system
that allows users to build a wide range of innovative, small footprint devices. A typical Windows®
CE-based device is designed for a specific use, and often runs disconnected from other computers,
or distributed as a front-end to a centralized host. Examples include enterprise tools, such as
industrial controllers, communications hubs, point-of-sale terminals, and display devices, such as
HMI, advertisement appliances, and interactive panels.
The following topics are covered in this chapter:
Overview
¾Model Descriptions and Package Checklist
¾UC-7122/7124 Features
¾Hardware Specifications
UC-7122/7124 Software
¾Applications Development Environment
¾Networking and Communications Capabilities
¾Supported Servers and Daemons
Obtaining the Firmware Build Version
Memory and File Systems
¾RAM File System
¾Flash File System
¾External File System
¾Cautions when Using File Systems
¾Using a RAM File System instead of a Flash File System
Hive-based Registry
Inserting an SD Card into the Computer
Connecting a USB Mass Storage Device to the Computer
RS-232/422/485 Serial Ports

UC-7122/7124 User’s Manual Introduction
Overview
The UC-7122/7124 embedded computers come with 2 or 4 RS-232/422/485 serial ports and dual
10/100 Mbps Ethernet LAN ports to provide users with a versatile communication platform,
making these RISC-based embedded computers ideal for your embedded applications.
The UC-7122/7124 embedded computers use the Cirrus Logic EP9302 ARM9 200 MHz RISC
CPU. Unlike the X86 CPU, which uses a CISC design, the ARM9’s RISC design architecture and
modern semiconductor technology provide the UC-7122/7124 with a powerful computing engine
and communication functions, but without generating too much heat. Moreover, the built-in 16
MB NOR Flash ROM and 32 MB SDRAM give you enough storage capacity to run applications
on the UC-7122/7124. The additional SD socket provides the flexibility for storage expansion, and
the dual LAN ports built into the ARM9 make the UC-7122/7124 ideal communication platforms
for simple data acquisition and protocol conversion applications. In addition, the RS-232/422/485
serial ports allow you to connect a variety of serial devices. Taken together, these features ensure
that the UC-7122/7124 embedded computers are convenient and powerful central control units for
industrial applications, such as data acquisition, remote device control and monitoring, and
protocol conversion.
Model Descriptions and Package Checklist
UC-7124-CE
Mini RISC-based, Ready-to-Run Embedded Computer with Dual LANs, 4 Serial Ports, SD, USB,
WinCE 5.0
UC-7122-CE
Mini RISC-based, Ready-to-Run Embedded Computer with Dual LANs, 2 Serial Ports, SD, USB,
WinCE 5.0
Each model is shipped with the following items:
y1 UC-7122/7124 embedded computer
yQuick Installation Guide
yDocument & Software CD
y100 cm RJ45-to-RJ45 Ethernet cross-over cable
yCBL-4PINDB9F-100: 100 cm console port cable, 4-pin header to female DB9
yUniversal Power Adaptor
yProduct Warranty Statement
Optional Accessories
y35 mm DIN-rail mounting kit (DK-35A)
NOTE: Please notify your sales representative if any of the above items are missing or damaged.
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UC-7122/7124 User’s Manual Introduction
UC-7122/7124 Features
The UC-7122/7124 embedded computers have the following features:
yCirrus Logic EP9302 ARM9 32-bit 200 MHz processor
y32 MB on-board RAM
y16 MB built-in flash memory
yRS-232/422/485 serial ports with software selectable interface
yBaudrates between 50 and 921.6Kbps; supports ANY BAUDRATE
yDual 10/100 M Ethernet for backup networking
ySD card slot for storage expansion
yLED indicators for status, serial transmission
yReady-to-run WinCE platform
yEasy DIN-rail or wall mounting
yFanless design for increased ruggedness
y-40 to 75°C wide temperature models available
Hardware Specifications
System
CPU Cirrus Logic EP9302 ARM9 RISC CPU, 200 MHz
RAM 32 MB
Flash 16 MB
Storage Expansion SD slot
USB USB2.0 host x 1
Console port RS-232 x 1 (TxD, RxD, GND), 4-pin header output, “115200, n, 8, 1”
Button Reset button x 1; supports “Reset to Factory Default”
Other RTC, buzzer, Watchdog Timer
OS Built-in WinCE 5.0
Network Communication
LAN 10/100 Mbps RJ45 x 2, auto-sensing
Protection 1.5 KV built-in magnetic isolation protection
Serial Communication
Serial Ports UC-7122: RS-232/422/485 male DB9 x 2
UC-7124: RS-232/422/485 male DB9 x 4
Protection 15 KV built-in ESD protection for all signals
Data bits 5, 6, 7, 8
Stop bit(s) 1, 1.5, 2
Parity None, Even, Odd, Space, Mark
Flow Control RTS/CTS, XON/XOFF, RS-485 ADDC™
Speed 50 bps to 921.6Kbps; supports ANY BAUDRATE
LEDs
System Ready, SD activity
LAN 10M/Link, 100M/Link (RJ45 connector)
Serial TxD, RxD
Power Requirements
Power Input 12 to 48 V
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UC-7122/7124 User’s Manual Introduction
Power Consumption (Without USB device plugged in)
UC-7122: 340 mA @ 12 VDC
UC-7124: 360 mA @ 12 VDC
(With USB device plugged in)
UC-7122: 667 mA @ 12 VDC
UC-7124: 700 mA @ 12 VDC
Mechanical
Dimensions
(W x D x H)
UC-7122/7124: 77 x 111 x 26 mm (without wall mount ears)
Construction Material UC-7122/7124: aluminum, 1 mm
Mounting DIN-rail, wall
Environment
Operating
Temperature
-10 to 60°C (14 to 140°F), 5 to 95% RH
-40 to 75°C (-40 to 167°F) is optional for –T models
Storage Temperature -20 to 80°C (-4 to 176°F), 5 to 95% RH
-40 to 85°C (-40 to 185°F) is optional for –T models
Regulatory Approvals
EMC FCC, CE (Class A)
Safety UL, cUL
Others RoHS, CRoHS, WEEE
Warranty 5 years
NOTE: (1) The USB Client function is reserved for future enhancement.
(2) CompactFlash is designed for Flash memory cards or Microdrives.
UC-7122/7124 Software
The UC-7122/7124 embedded computer is a ready-to-run, RISC-based, “headless” computer with
a robust and network-centric design. It uses the Microsoft® Windows® CE 5.0 operating system.
Developers of embedded communication applications will find that the open programming
environment makes the UC-7122/7124 well-suited for both new system development and legacy
system migration.
Applications Development Environment
yC Libraries and Run-times—Compared to the C libraries and run-times used on a desktop PC
running Windows®, the C libraries and run-times on a UC-7122/7124 WinCE are a subset of
the WIN32 APIs. The system supports a full ANSI C run-time, standard input/output library,
standard input/output ASCII library, and standard ASCII string functions. In addition, C++
compiler exception handling and Run-Time Type Information (RTTI) equivalent to desktop
C++ compilers are supported.
yComponent Services (COM and DCOM)—The Common Object Model (COM) is an
operating system-independent, object-oriented system for creating binary software components
that can interact with other COM-based components in the same process space, in other
processes, or on remote machines.
yMicrosoft® Foundation Classes (MFC)—MFC is a comprehensive class library and complete
object-oriented application framework designed to help build applications, COM components,
and controls.
yWinsock 2.2—Provides enhanced capabilities over Winsock 1.1, including installable service
providers for additional third-party protocols, and Media sense.
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UC-7122/7124 User’s Manual Introduction
Networking and Communications Capabilities
ySimple Network Management Protocol (SNMP)—Monitors remote connections to the
network.
ySimple Network Time Protocol (SNTP) Client—Provides support for synchronizing the
device’s system time with an SNTP server, and supports Daylight Savings Time.
ySerial Communications—In addition to the 16550 UART driver bound to a debug port and the
console port, a special driver for 8 or 16 additional Moxa serial ports is also included.
yNetwork Utilities (IpConfig, Ping, Route)—Utilities for troubleshooting various network
problems.
yTCP/IP—Includes IP, Address Resolution Protocol (ARP), Internet Control Message Protocol
(ICMP), Internet Group Membership Protocol (IGMP), Transmission Control Protocol (TCP),
User Datagram Protocol (UDP), name resolution and registration, and DHCP.
Supported Servers and Daemons
yTelnet Server—A sample server that allows remote administration through a standard Telnet
client.
yFTP Server—A sample server used for transferring files to and from remote computer systems
over a network using TCP/IP.
yWeb Server (HTTPD)—Includes ASP, ISAPI Secure Socket Layer support, SSL 2, SSL 3,
Transport Layer Security (TLS/SSL 3.1) public key-based protocols, and Web Administration
ISAPI Extensions.
Obtaining the Firmware Build Version
There are two ways to obtain the firmware version of UC-7122/7124 embedded computers. This
information is particularly important for identifying the features supported by the computer.
yExamine the welcome message after you log on to the computer.
yLog on to the web-based management system (described in a later chapter) to view the system
information.
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UC-7122/7124 User’s Manual Introduction
Memory and File Systems
The 32 MB of SDRAM is divided into two main parts. The main memory, which houses the
operating system and user applications, has a capacity of about 20 MB. The kernel image occupies
the remainder of the memory space.
RAM File System
The internal file system in the UC-7122/7124 computer controls access to flash and also provides
file storage in the object store, which is in the RAM. The root directory is a RAM file system of
size 4 MB. Child directories such as “Windows,” “Temp,” “My Documents,” “Network,” and
“Program Files” are under the root directory. They can be used for storing temporary files for your
applications. However, do not place persistent files or applications in these directories because
they will be deleted when the system is shut down. Instead, place them in the “NORFlash”
directory.
Flash File System
The Flash file system provides persistent storage for applications and related data, even when the
main power supply is lost. The system integrates the read-only files that are stored on the Flash
with the read/write files from both applications and users. A child directory named “NORFlash” is
created under the root; the size of the directory is 8 MB.
External File System
The additional file systems from USB and SD storage devices are placed in the root of the internal
file system. If you intend to use these devices to port data between your PC and the UC-7122/7124
computer, you should format them using the FAT file system on your PC.
Cautions when Using File Systems
We recommend storing your programs only in the on-board NOR Flash. Please store the log data
generated by your programs in an external storage device such as an SD card or Network File
System. Note that a Network File System will generally provide more storage space than the SD
card. In addition, it is easier to replace a full or damaged Compact Flash than an on-board NOR
Flash.
A NOR Flash has a life cycle of 100,000 write operations in block (128 KB) level, and does not
support BBM (Bad Block Management). For this reason, the FAT file system would not know
when a flash block has reached its cycle, and would try to scan the block repeatedly.
FAT sequentially searches for free memory space for write operations. After deleting many files,
the memory space could become fragmented, making it more difficult to search for free space. If
your program updates (deletes and then creates) a file frequently, it is quite possible that the
program writes data to the same flash area. In the long run, FAT would be blocked when scanning
the area and would cause the operating system to hang.
An SD card has its own life cycle. Since most SD cards are made from a NAND Flash, their
hardware controllers implement BBM. This feature allows FAT to skip bad blocks if they exist.
Furthermore, the memory space of an SD card is much larger than that of the NOR Flash. Using
this space cautiously will ensure that its life cycle is not exceeded. When creating a file for storing
log data, we suggest creating a large empty file (e.g., 30 MB), and then writing data evenly to that
space. When the space is used up, the program rewinds the write operations. As a result, the
number of write operations to each block is reduced.
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UC-7122/7124 User’s Manual Introduction
Using a RAM File System instead of a Flash File System
Even though data in the RAM file system will be deleted after shutting off the power, using the
RAM file system has several advantages over using the Flash file system, including faster
read/write access and not needing to deal with the life cycle issue.
For important applications that relay data back to the host directly, you should write the necessary
log data to the RAM file system. After the host accesses the data, the application erase the data,
freeing up the memory space for further use.
The embedded computer has limited resources, and designers should decide if storing data in a file
system is really necessary. If it is necessary, be sure to choose the most appropriate file system.
Hive-based Registry
The registry for the UC-7122/7124 is a hive-based registry instead of a RAM-based registry. The
hive-based registry stores registry data inside files, or hives, which can be stored in any file system.
This eliminates the need for performing backup and restoring power.
Each file or hive contains a collection of registry data. The hive-based registry is split into two
hives: the system hive, which contains all system data, and the user hive, which contains all data
pertinent to one particular user. The UC-7122/7124 embedded computer is a multi-user system,
and accordingly contains several user hives. A user’s hive will be mounted on logon and
dismounted on logoff.
Inserting an SD Card into the Computer
The UC-7122/7124 is equipped with an SD slot. When an empty SD card is inserted into the slot,
the computer automatically formats it to the FAT system. This process takes a few minutes to
complete. After an SD card is inserted, the embedded computer will create a directory named
“StorageDisk” under the root directory. The “StorageDisk” directory controls access to the SD
storage space. The embedded computer will create a directory called “StorageDisk2” if another
USB storage device is plugged in at a later time.
Connecting a USB Mass Storage Device to the Computer
The USB mass storage device is considered to be highly portable between your PC and a computer
that does not support the TFAT system. We suggest that you format your devices with the FAT
format. When the first USB storage device is plugged into the slot on the back of the computer, a
directory named “USBDisk” under the root directory is created in the internal file system as a link
to the storage device. The embedded computer will create a directory called “StorageDisk2” if
another SD storage device is plugged in at a later time.
The following table lists USB mass storage devices that have been tested successfully for
compatibility.
Vendor Device Name Size
CRUZER mini 128 MB
Intel Flash memor
y
128 MB
Aboco
m
128 MB
P
Q
I 256 MB
Transcend JetFlash 512 MB
Transcend JetFlash 1 GB
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UC-7122/7124 User’s Manual Introduction
ATTENTION
Some USB storage devices may not be detected by the system. We suggest that you use one of
the devices listed in the above table, since these USB mass storage devices have been tested
successfully for compatibility.
RS-232/422/485 Serial Ports
The UC-7122/7124 computer comes with two embedded serial ports, referred to as “COM1” and
“COM2.” COM1 is hidden inside the embedded computer’s outer casing, and is only used for
debugging purposes when developing the firmware. COM2 is used as a console port, and allows
users to connect to the computer through a 3-pin serial cable. Neither of the two COM ports are
programmable, and for this reason they cannot be used by your applications.
The UC-7122’s 2 serial ports are designated as “COM3” and COM4” (from left to right). The
UC-7124’s 4 serial ports are designated as “COM3” to COM6” (from left to right). The serial
ports are designed to provide reliable, high-speed operation (up to 921600 bps). Each port supports
three operation modes (RS-232, RS-422, and RS-485) to handle a diversity of applications. For
detailed information on configuring the serial ports, please refer to the “Serial Port Configuration”
section in Chapter 3, “Web-based Management.”
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2
2
Chapter 2 Getting Started
In this chapter, we explain how to use a PC to operate a UC-7122/7124 embedded computer. We
will refer to the PC that connects to the UC-7122/7124 as a development workstation, and the
UC-7122/7124 embedded computer will be called a target computer.
development workstation = PC used to operate the embedded computer
target computer = UC-7122/7124 embedded computer
In addition, we describe the steps you should follow to carry out certain operations, such as setting
the system time and troubleshooting network connectivity. Some of these operations can be carried
out using system commands after gaining access to the target computer, and others can be carried
out using a web-based management system. The we-based management system is described in a
later chapter.
The following topics are covered in this chapter:
Starting Your UC-7122/7124 Computer
Resetting Your UC-7122/7124 Computer
Operating Your UC-7122/7124 Computer through the Serial Console
Changing the Network Settings
Operating Your UC-7122/7124 Computer through a Telnet Client
User/Group Management
System Time Management
Starting and Stopping Services
Troubleshooting Network Connectivity
Simple Network Management Protocol (SNMP)

UC-7122/7124 User’s Manual Getting Started
Starting Your UC-7122/7124 Computer
Connect the SG wire to the shielded contact located in the upper left corner of the UC-7122/7124
computer, and then power it up by connecting it to the power adaptor. It takes about 30 to 60
seconds for the system to boot up. Once the system is ready, the “Ready” LED will light up. The
light will stay lit until you shut down the computer.
Resetting Your UC-7122/7124 Computer
When the target computer stops responding, or an application locks up, or the target computer fails
to work normally, you may need to restart or reset the target computer’s operating system. We
provide four ways to restart or reset the operating system.
Warm-Start: When the computer is powered on, insert a pin into the “Reset” hole next to the
serial console, and hold for 1 to 2 seconds. The computer will reboot automatically.
Cold-Start: Unplug the power line and then plug it back in again. The computer will reboot
automatically.
Resetting to Factory Defaults: If the computer is not working properly, and you want to reset it
back to factory default settings, press and hold the “Reset” button for at least 5 seconds. The
buzzer will sound while the factory default settings are being loaded. After the factory defaults
have been loaded, the computer will reboot automatically.
Resetting the system: In rare circumstances, the TFAT file system may be damaged by executing
improper applications, or due to an unstable power supply. In this case, the computer may fail to
boot up if the TFAT table crashes. In order to get the system back up and running, you will need to
format the flash disk and reset the operating system. Note that all user files and configurations will
be erased. The following steps show how to format the flash disk through boot loader utilities.
Step 1: Power off the UC-7122/7124 embedded computer.
Step 2: Connect the UC-7122/7124 to your PC using the console port cable.
Step 3: Start a terminal program with the settings: Baudrate = 115200, no hardware flow control,
8 N 1, character set VT100.
Step 4: Hold in the “DEL” key on your PC.
Step 5: Power on the UC-7122/7124. You will be guided to boot loader utility menu.
Step 6: Type “4” for “Format Flash Disk and Reset OS” and then press Enter.
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UC-7122/7124 User’s Manual Getting Started
Step 7: After a few seconds, you will see the bootloader menu again. Unplug the power line and
then plug it back again. It takes about 3 minutes to reset the operating system.
Operating Your UC-7122/7124 Computer through the Serial
Console
The serial console port (located next to the two LAN ports) gives users a convenient way of
connecting the development workstation to the console utility of the target computer. This method
is particularly useful when using the computer for the first time.
After you have wired a serial cable, go back to the development workstation and start a terminal
program (e.g., HyperTerminal) by using the settings shown below for the serial console port.
Baudrate 115200 b
p
s
Parit
y
N
one
Data bits 8
Sto
p
bits 1
Flow Control
N
one
Terminal ANSI
After a successful connection, type the login name and password as requested to log on to the
computer. The default values are both admin.
Login: admin
Password: admin
Changing the Network Settings
The UC-7122/7124 computer comes with two or four network interfaces. The default IP addresses
and netmasks of the network interfaces are shown in the following table:
Default IP Address Netmas
k
LAN1 192.168.3.127 255.255.255.0
LAN2 192.168.4.127 255.255.255.0
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UC-7122/7124 User’s Manual Getting Started
For most applications, you will need to change the network settings to math the local network to
which the development workstation is connected. If you do not change the IP addresses, you may
not be able to make a network connection to the UC-7122/7124 directly. The “netconfig”
command is a utility that is used to complete the task. Before changing the IP addresses, type
“netconfig -h” to list the help for this command.
\> netconfig -h
netconfig V1.0
Usage: netconfig -n <AdapterName | Alias> [-EnableDHCP] [-i <IP address>] [-m
<netmask>]
For example, if your development workstation has a LAN port at 192.168.1.1, and the IP address
of the Domain Name Server (DNS) is 192.168.2.6, execute the following command.
\> netconfig –n LAN1 –i 192.168.1.5 –m 255.255.255.0 –g 192.168.1.254 –d 192.168.2.6
Use the command “netconfig” to view the updated settings.
> netconfig
Ethernet Adapter [CS89501]:
IP Address: 192.168.3.127
SubNet Mask: 255.255.255.0
Gateway
Ethernet Adapter [AX887961]:
IP Address: 192.168.4.127
SubNet Mask: 255.255.255.0
Gateway
Operating Your UC-7122/7124 Computer through a Telnet
Client
We suggest changing the network settings of the computer (see the above section) so that at least
one of the two network ports is on the same LAN as your development workstation.
Use a cross-over Ethernet cable to connect directly from your development workstation to the
UC-7122/7124 computer, or use a straight-through Ethernet cable to connect the computer to a
LAN hub or switch. Next, use the Telnet client in your development workstation to connect to the
Telnet console utility of the UC-7122/7124 computer. After connecting successfully, type the
login name and password as requested to log on to the computer.
Login: admin
Password: admin
After logging on through the console port or through a Telnet client, a list of busybox commands
are available to operate the computer. Use “HELP” to display all of the commands and type
“HELP [command name]” to display extended help for the given command. Some of these
commands, such as “DATE” and “TIME” are very useful for managing the computer’s system
time. Other commands, such as “DIR” and “MKDIR” are good utilities for file management. For
example, to inspect the file structure of the root directory, type DIR.
> dir /b
Network
NORFlash
My Documents Program Files Temp
Windows
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UC-7122/7124 User’s Manual Getting Started
User/Group Management
User Grouping: You often need to define a user group that will be associated with a particular
system service, and manage this service to be accessible only by the users authorized to register
with this group. Three user groups, namely ftpd, telnetd, and httpd, have been created in the
default factory kernel for your convenience.
Use command useradd –g <groupName> to create a user group.
\> useradd –g yyyy
group yyyy has been added.
To remove a group, use the command userdel –g <groupName>.
\> userdel –g yyyy
group yyyy has been removed.
User Addition: Use the command useradd <newUserID> to add a user for accessing the system.
By default, the user’s password is the same as the user name.
\> useradd xxxx
user xxxx has been added.
In addition, you can allow this user to access a particular service by typing “-g” followed by the
user group name of the service. For example, useradd –g <groupName> <newUserID>. For
example,
\> useradd –g telnetd xxxx
user xxxx is existent
group telnetd is existent
user xxxx has been added to group yyyy
User Deletion: Use the command userde <userID>l to prevent a user from accessing the system.
Note that the user “admin” cannot be deleted.
\> userdel xxxx
user xxxx has been deleted
You can also just remove a user from a user group with the command userdel –g <groupName>
<newUserID>. For example,
\> userdel –g yyyy xxxx
user xxxx has been removed from group yyyy
Password Change: Use the command passwd <userID> to change your login password. Type
\> passwd xxxx
Current password:
New password:
Retype new password:
Password has been changed
User List: Use the command userlist to list all users.
\> userlist
List all users
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System Time Management
Setting the System Time Manually: Use the date and time commands to query the current
system date/time, or to set a new system date/time.
\> date
The current date is: Tuesday, November 22, 2005
Enter the new date (mm-dd-[yy]yy): 12-23-05
\> date /T
Wednesday, November 23, 2005
\> time
The current time is: 5:27:17 PM
Enter the new time (hh:mm:ss): 16:02:00
\> time /T
4:02:04 PM
Starting and Stopping Services
After booting up, the UC-7122/7124 computer runs several services continuously to serve requests
from users or other programs. Some important services are telnet (“TEL0:”), console (“CON0:”),
world wide web HTTP (“HTP0:”), and file transfer FTP (“FTP0:”). If you rarely use these services,
you can still start up or stop a service with its associated name by using the services command.
For example:
Start the FTP service with the following command:
\> services start FTP0:
Stop the FTP service with the following command:
\> services stop FTP0:
Troubleshooting Network Connectivity
The ipconfig tool prints the TCP/IP-related configuration data of a host, including the IP addresses,
gateway, and DNS servers.
\> ipconfig /all
Windows IP configuration
Ethernet adapter Local Area Connection:
IP Address: 192.168.30.127
Subnet Mask: 255.255.255.0
Adapter Name: CS89501
Description: CS89501
Adapter Index: 2
Address: 00 90 e8 00 d1 23
DHCP Enabled: NO
Ethernet adapter Local Area Connection:
IP Address: 192.168.27.17
Subnet Mask: 255.255.255.0
Default Gateway: 192.168.27.254
Adapter Name: AX887961
Description: AX887961
Adapter Index: 3
Address: 00 90 e8 00 d1 24
DHCP Enabled: YES
DHCP Server: 192.168.1.95
Primary WINS: 192.168.1.98
Secondary WINS: 192.168.1.99
Lease obtained on: Wednesday, April 11 ,2007 23 : 6 : 46
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UC-7122/7124 User’s Manual Getting Started
Lease expires on: Sunday, April 15 ,2007 23 : 10 : 46
AutoConfig Enabled: YES
Host name: UC7124
Domain Name: moxa.com
DNS Servers: 192.168.1.99
192.168.1.98
NODETYPE: 8
Routing Enabled: NO
Proxy Enabled: NO
To troubleshoot network connectivity or name resolution, use the ping command. This command
verifies IP-level connectivity to another TCP/IP computer by sending Internet Control Message
Protocol (ICMP) Echo Request messages. The corresponding return Echo Reply messages are
displayed, along with round-trip times. For more information, type ping without parameters.
\> ping www.moxa.com
Pinging Host www.moxa.com [192.168.1.16]
Reply from 192.168.1.16: Echo size=32 time<1ms TTL=126
Reply from 192.168.1.16: Echo size=32 time<1ms TTL=126
Reply from 192.168.1.16: Echo size=32 time<1ms TTL=126
The route utility allows you to view or modify network routing tables. Type this command
without parameters to view a list of functions.
\> route
To view current routing items in the tables, type
\> route PRINT
To add a routing item on network interface 1, type
\> route ADD 192.168.0.0 MASK 255.255.0.0 192.168.15.254 IF 1
To delete a routing item, type
\> route DELETE 192.168.0.0
Simple Network Management Protocol (SNMP)
SNMP is the standard Internet protocol for network management, and belongs to the TCP/IP
protocol suite. SNMP was developed to monitor and manage networks. It uses a distributed
architecture that consists of agents and managers:
yThe SNMP agent is an SNMP application that monitors network traffic and responds to queries
from SNMP manager applications. The agent also notifies the manager when significant events
occur by sending a trap.
yAn SNMP manager is an SNMP application that generates queries to SNMP-agent applications
and receives traps from SNMP-agent applications.
The UC-7122/7124 computer installs an SNMP agent to serve as an SNMP device. You should
install the SNMP manager on the workstation computer (for example, a Linux system) that
monitors the network. After installing the nodes, you need to configure the SNMP manager and
agent.
To check SNMP agent capabilities on a target UC-7122/7124 computer (e.g., network IP at
192.168.3.127), log on to the workstation computer on which the SNMP manager resides, and
type:
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\> snmpwalk -v 2c -c public 192.168.3.127 system
SNMPv2-MIB::sysDescr.0 Microsoft Windows CE Version 5.0 (Build 1400)
SNMPv2-MIB::sysObjectID.0 SNMPv2-SMI::enterprises.311.1.1.3.3
SNMPv2-MIB::sysUpTime.0 1282929
SNMPv2-MIB::sysContact.0 Your System Contact Here
SNMPv2-MIB::sysName.0 WindowsCE
…
You will see a series of messages from the SNMP agent on the UC-7122/7124 computer. You may
then proceed to monitor and manage the computer.

3
3
Chapter 3 Web-based Management System
Note: You must use Internet Explorer 5.5 or above to access the web-based management
system.
The UC-7122/7124 ready-to-run embedded computers are network-centric platforms designed to
be used as front-end computers for data acquisition and industrial control. Due to the distributed
characteristics of the devices that these computers control, they often reside in harsh environments
away from the system administrator. To manage these computers, operations such as
networking/server configuration, file management, and process (thread) monitoring/control are
critical.
The following topics are covered in this chapter:
Logging onto the Web-based Management System
System Information
Networking/Server Configuration
Serial Port Configuration
Monitoring and Controlling Services
Monitoring and Controlling Processes (Threads)
Launching Processes Automatically