AAxeon STW-601C User manual

Wireless Serial-Ethernet Server
STW-601C
User’s Manual
Version 1.3

User’s Manual Version 1.3
Airolinx Wireless Serial-Ethernet Server
STW-601C
- II -
IMPORTANT ANNOUNCEMENT
The information contained in this document is the property of Aaxeon Technologies, Inc. and is supplied
for the sole purpose of operation and maintenance of products of Aaxeon Technologies, Inc. No part of
this publication is to be used for any other purposes, and it is not to be reproduced, copied, disclosed,
transmitted, stored in a retrieval system, or translated into any human or computer language, in any form,
by any means, in whole or in part, without the prior explicit written consent ofAaxeon Technologies, Inc.
Published by
Aaxeon Technologies, Inc.
Toll-Free: 1-877-AAXEON-5
1-877-229-3665
e-Mail: [email protected]
Website: www.aaxeon.com
Copyright © 2007Aaxeon Technologies, Inc. All rights reserved.
All other product names referenced herein are registered trademarks of their respective companies.

User’s Manual Version 1.3
Airolinx Wireless Serial-Ethernet Server
STW-601C
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FCC WARNING
Class B for Wireless Serial Server
This STW-601C has been tested and found to comply with the limits for a Class B digital device,
pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference in a residential installation. This equipment generates, uses and can radiate
radio frequency energy and, if not installed and used in accordance with the instructions, may cause
harmful interference to radio communications. However, there is no guarantee that interference will not
occur in a particular installation. If this equipment does cause harmful interference to radio or television
reception, which can be determined by turning the equipment off and on, the user is encouraged to try to
correct the interference by one of the following measures:
zReorient or relocate the receiving antenna.
zIncrease the separation between the equipment and receiver.
zConnect the equipment into an outlet on a circuit different from that to which the receiver is
connected.
zConsult the dealer or an experienced radio/TV technician for help.
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
(1) This device may not cause harmful interference, and (2) this device must accept any interference
received, including interference that may cause undesired operation.
FCC Caution: Any changes or modifications not expressly approved by the party responsible for
compliance could void the user's authority to operate this equipment.
IMPORTANT NOTE:
FCC Radiation Exposure Statement:
This STW-601C complies with FCC radiation exposure limits set forth for an uncontrolled environment.
This STW-601C should be installed and operated with minimum distance 20cm between the radiator &
your body.
This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter.
IEEE 802.11b/g operation of this product in the U.S.A. is firmware-limited to channels 1 through 11.

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STW-601C
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Contents
1. INTRODUCTION ................................................................................................1
2. APPLICATION CONNECTIVITY ............................................................................2
2.1 TCP &UDPPROTOCOLS.................................................................................2
2.1.1 TRANSMISSION CONTROL PROTOCOL (TCP) .....................................................2
2.1.2 USER DATAGRAM PROTOCOL (UDP).................................................................2
2.2 CONNECTIVITY TOPOLOGY................................................................................2
2.2.1 VIRTUAL COM MODE.......................................................................................3
2.2.2 TUNNELING MODE............................................................................................4
3. HARDWARE DESCRIPTION AND SETTINGS ..........................................................8
3.1. PACKAGING.....................................................................................................8
3.2. INTERFACES ....................................................................................................8
3.3. MODE SWITCH ...............................................................................................8
3.4. HARDWARE INSTALLATION PROCEDURES...........................................................9
3.5. DEFAULT SETTINGS..........................................................................................9
3.6. ASSIGNING NEW IPADDRESS WITH ARP COMMANDS ......................................10
3.7. AUTO IP(DYNAMIC IP)...................................................................................10
3.8. TCP/IPPORT NUMBER..................................................................................10
4. SOFTWARE CONFIGURATION........................................................................... 11
4.1. CONFIGURATION SET BY MONITOR.EXE UTILITY ............................................... 11
4.2. CONFIGURATION SET BY TELNET UTILITY ........................................................ 11
4.2.1. GENERAL INFORMATION FROM OVERVIEW........................................................12
4.2.2. NETWORKING SETTINGS.................................................................................14
4.2.3. CONFIGURING SERIAL ....................................................................................17
4.2.4. CONFIGURING LINK MODE –TCPSERVER MODE.............................................17
4.2.5. CONFIGURING LINK MODE –TCPCLIENT MODE..............................................17
4.2.6. CONFIGURING LINK MODE –UDP MODE .........................................................18
4.2.7. CONFIGURING SERIAL FOR COM PORT ...........................................................18
4.2.8. CONFIGURING PACKET DELIMITER...................................................................19
4.2.9. CONFIGURING WIRELESS SETTINGS................................................................20
4.2.10. SITE SURVEY.................................................................................................21
4.2.11. CONFIGURING WIRELESS LAN BY MANUAL .....................................................22
4.2.12. CONFIGURING AD-HOC MODE.........................................................................23
4.2.13. CONFIGURING WIRELESS FOR WEP................................................................23
4.2.14. CONFIGURING INFRASTRUCTURE MODE...........................................................24
4.2.15. SETTINGS WITH OPEN AUTHORIZATION AND NONE ENCRYPTION........................24

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4.2.16. CONFIGURING SHARE AUTHORIZATION WITH WEP ENCRYPTION........................25
4.2.17. CONFIGURING WIRELESS NETWORK VIA ACCESS POINT WITH WPA-PSK..........26
4.2.18. CONFIGURING SYSTEM SECURITY ...................................................................26
4.3. CONFIGURATION USING WEB BROWSER..........................................................28
4.3.1. LOGIN TO SYSTEM BY WEB.............................................................................28
4.3.2. GENERAL INFORMATION FROM OVERVIEW........................................................28
4.3.3. NETWORK SETTING FROM NETWORK PAGE .....................................................30
4.3.4. CONFIGURING LAN SETTINGS ........................................................................30
4.3.5. CONFIGURING WLAN SETTINGS.....................................................................31
4.3.6. CONFIGURING DNS SETTINGS........................................................................31
4.3.7. CONFIGURING SNMP SETTINGS .....................................................................31
4.3.8. WIRELESS CONFIGURATION FROM WIRELESS PAGE..........................................32
4.4. WIRELESS DETAIL SETTINGS FROM POP-UP PAGE ...........................................33
4.4.1. MORE CASES FOR DIFFERENT WIRELESS APPLICATIONS..................................33
4.4.2. CONFIGURING COM SETTING FROM SERIAL PAGE ...........................................36
4.4.3. CONFIGURING LINK MODE..............................................................................36
4.4.4. CONFIGURING TCP SERVER MODE .................................................................36
4.4.5. CONFIGURING TCP CLIENT MODE ..................................................................37
4.4.6. CONFIGURING UDP MODE..............................................................................37
4.4.7. CONFIGURING SERIAL SETTING.......................................................................38
4.4.8. CONFIGURING PACKET DELIMITER...................................................................39
4.4.9. CONFIGURING SYSTEM...................................................................................40
4.4.10. CONFIGURING TIME BY NTP SERVICE..............................................................40
4.4.11. CHANGING PASSWORD FROM SYSTEM SETTINGS .............................................41
4.4.12. RESTORING FACTORY DEFAULT ......................................................................41
4.4.13. RESTART SYSTEM..........................................................................................41
APPENDIX A: USING VIRTUAL COM ....................................................................................42
A.1 PRE-INSTALLATION REQUIREMENTS.................................................................42
A.2 APPLYING TO THE SERIAL SERVER...................................................................42
A.3 VIRTUAL COM COMMUNICATION .....................................................................43
APPENDIX B: SNMP SETUP ...............................................................................................47
B.1 SNMP NETWORK MANAGEMENT PLATFORM ...................................................47
APPENDIX C: UPGRADING SYSTEM SOFTWARE ....................................................................48
C.1 SYSTEM UPGRADING PROCEDURES ................................................................48
C.2 CRITICAL ISSUES IN UPGRADING PROCESS......................................................49
APPENDIX D: STW’S SPECIFICATIONS.................................................................................50
D.1 HARDWARE SPECIFICATIONS ..........................................................................50

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D.2 SOFTWARE SPECIFICATIONS ...........................................................................51
D.3 CONNECTOR PIN ASSIGNMENTS......................................................................51
D.4 BEEP &LED STATUS.....................................................................................52
D.5 RUN THE UTILITY............................................................................................54
D.6 DETECTING OPERATIONAL DEVICES................................................................54
D.7 CONFIGURING DEVICES..................................................................................54

User’s Manual Version 1.2
Airolinx Wireless Serial-Ethernet Server
STW-601C
Copyright © 2007 Aaxeon Technologies, Inc.
All rights reserved.
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1. Introduction
The STW-601C Wireless-Serial Server is a gateway between wireless LAN or Ethernet (TCP/IP) and
RS-232/RS-485 communications. It allows almost any serial device to be connected to a new or existing
wireless network. The information transmitted by STW-601C is transparent to both host computers (IP
network over wireless LAN or Ethernet) and devices (RS-232/RS-485). Data coming from the wireless
LAN or Ethernet (TCP/IP) is sent to the designated RS-232/RS-485 port and data being received from
RS-232/RS-485 port is sent to the Wireless or Ethernet (TCP/IP) transparently.
In the computer integration manufacturing or industrial automation area, The STW-601C Wireless Serial
Server (Throughout the manual, an abbreviated form “STW” will be used) is used for field devices to direct
connect to Ethernet network. Terminal Server (main control program run in STW) transforms whatever
data received from RS-232/RS-485 to TCP/UDP port then connects devices to the IP network via a single
application program or multiple application programs.
Many control devices provide the ability to communicate with hosts through RS-232/RS-485 however
RS-232/RS-485 serial communication has its limitations. For instance, it is hard to transfer data through a
long distance. With STW, it is possible to communicate with a remote device in the Intranet environment
or even in the Internet and thus, increases the communication distance dramatically.
Flexible configuration options enable this unit to be setup remotely over IP network by Telnet, web browser,
or Window utility. Packed in a rugged DIN Rail mountable case and 9~30V DC power input range, STW is
ideal for almost any industrial and manufacturing automation.

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2. Application Connectivity
STW provides Tunneling and Virtual COM operation mode. The STW family is designed to transmit data
between one-or-more serial device and one-or-more TCP/IP device through wireless, and hence enhance
the accessibility of the serial device through the ubiquitous TCP/IP based Ethernet. Examples of these
devices are PLC controllers, card readers, display signs, security controls, CNC controller, etc. It has
overcome the limit with a family of STW Series.
2.1 TCP & UDP Protocols
STW can be operated in various Internet Protocols–including two most common protocols: TCP and
UDP.
2.1.1 Transmission Control Protocol (TCP)
TCP provides a connection and a byte oriented data stream; it is error free, with control parameters such
as flow control, multiple ports option, and order delivery notification. With TCP, networked computers are
connected to one another. Once the connection is established, data can transmit in both directions. TCP
guarantees data sent from one node to be received in the same order by the other node(s). The protocol
also distinguishes the sent data for different applications (such as a Web server or an email server) on the
same computer.
For redundant or dual-network connectivity purposes, STW offers two TCP operation Modes so users may
choose for their specific application: TCP Server Mode and TCP Client Mode.
2.1.2 User Datagram Protocol (UDP)
UDP is a faster datagram delivery protocol. One can configure in the UDP mode on a TCP/IP network to
establish a connection, transmitting multicast data to/from a serial device to one/multiple host computer.
However, UDP does not guarantee the reliability and orderly data streams provided by the TCP mode;
datagram may arrive out of order or go missing without notice; the tradeoff is: UDP is faster and hence
more attractive in time-sensitive applications.
2.2 Connectivity Topology
SE Server is also equipped with Tunneling and Virtual COM operation modes. It is designed to transmit
data among multiple serial devices and among multiple TCP/IP devices on Ethernet, and hence enhances
accessibility of the serial devices immensely. Examples of these serial devices are PLC controllers, card
readers, display signs, security controls, and CNC controllers (See Fig. 1).
Fig. 1. Typical Topology of STW Connection

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2.2.1 Virtual COM Mode
The Virtual Com software emulates a serial port with Internet or LAN topology. In the Virtual COM Mode,
COM data is converted to Ethernet format. By creating a virtual COM port on a PC, the Virtual COM
driver redirects communications from the virtual COM port to an IP address (and the designated port
number). Figure 2 illustrates a Virtual COM connection diagram.
TCP Server in Virtual COM Mode
STW can be configured in the TCP server mode (with respect to the device as “Client”) with a unique IP
and Port number, and it waits passively for the computer to establish a connection with the serial device
(the client). After the connection is established, data can flow in both directions at the same time.
Fig. 2. TCP Connection in Virtual COM Mode
Configuring STW to TCP server
Using one of the four configuration methods (Telnet, Web, console and LCM controller), one may configure
STW to a TCP Server.
1. IP filter disabled (default)
2. Default STW port number 4660
3. If IP filter is enabled, only the source IP assigned is allowed to be connected to STW.
TCP Client of Virtual COM Mode
STW can be configured to TCP Client mode (with respect to a Host) to establish a TCP connection to an
application server, or the Remote Control Host. Once the connection is complete, multiple hosts of STW
can exchange data with several devices at the same time.

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STW-601C
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Fig. 3. STW as TCP Server in Virtual COM Mode
Configuring STW series to TCP client
One can configure STW to a TCP Client; for example, the destination IP is 10.0.0.100 and the destination
port is 1000, and the IP filter is disabled (by default).
Fig. 4. STW as TCP Client in Virtual COM Mode
2.2.2 Tunneling Mode
Tunneling Mode is used for multiple serial devices to “talk” among one another through STW’s through
wireless LAN (or Ethernet). This mode is particularly useful when two or more serial devices are far away.

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This mode can be used to extend the normal serial communication distance of 15 m to 100 m or longer.
STW can be configured to the TCP Server Mode and waits for the host computer to establish a
connection with a serial device (the client). After the connection is established, data can flow in both
directions (also see Chapter 4 Method of Configuration), and hence enables two or more serial devices to
communicate with one another over IP network.
TCP –Server & Client
One may establish a connection between a TCP Server and a TCP Client for Master /Slave PLCs or other
serial devices.
Fig. 5. TCP Link in Tunneling mode
Configuring SE Series to Tunneling Mode
Using one of the four configuration methods (Telnet, Web, console and LCM controller), one may configure
STW to TCP Server mode with a listening 4660 port, and with other serial servers configured as TCP
Clients
Tip：TCP server shall assign the destination IP and the destination port corresponding to TCP client’s
listening port (example: TCP 4660 port).

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STW-601C
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Fig. 6. STW as TCP Tunneling Links
UDP
In UDP mode, one may exchange Multicast data from one STW with multiple STW’s (or other Serial
Servers), Vice versa is also true.
Fig. 7. UDP Link in Tunneling mode
Configuring STW series in UDP Mode
Using one of the four configuration methods (Telnet, Web, console and LCM controller), one may
configure STW or other’s serial server to UDP mode. Note that the Multicast IP address is limited by the
Class of IP address and subnet mask. As an example, for a network of Class C of subnet 192.168.1.X and
a subnet mask of 255.255.255.0, the maximum Multicast IP address to be configured is four destinations
IP’s.

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Fig. 8. STW as UDP Tunneling Links

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STW-601C
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3. Hardware Description and Settings
3.1. Packaging
zSTW-601C Wireless Serial Server x 1
zMini DIN to DB-9 Cable x 1
z5 pins Terminal Block for Serial Connector x 1
z3 pins Terminal Block for Power Input x 1
z4 dBi Antenna x 1
zWall mount kits x 2
zQuick start guide x 1
zProduct CD containing configuration utility x 1
3.2. Interfaces
Figure 2.1 the STW interfaces are shown.
Fig. 9. STW Interfaces
3.3. MODE Switch
The default setting is RS-232 mode. Software configurations can be changed from the default settings to
user’s desired mode by web browser or telnet tools. To modify the configurations, use the web browser,
Telnet or monitor.exe configuration utilities.

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3.4. Hardware Installation Procedures
Prepare necessary cables, hub, power cord and RS-232/RS-485 connector.
Place STW to the area that an access point can cover, or connect it via Ethernet cable with RJ45
connector.
Connect STW’s serial port to a serial server; make sure the connector of RS-232 or RS-485 is correct.
Plug in STW to DC-9-30V power source (Or to a 9~30V DC Terminal Block, the buzzer will beep and
the RUN LED will blink if STW’s functions normally. LED Status sees Appendix A.4.
Use monitor.exe configuration utility on the product CD to check the status of STW. If it starts up
successfully, one shall find the IP and MAC addresses of STW. One may change IP address, gateway
IP address and subnet mask networking parameters of STW to join your LAN.
Note: If there are more than one access points, the access point’s SSID shall the same.
3.5. Default Settings
The STW default settings are shown in the following table:
Property Default Value
Ethernet Port
IPAddress 10.0.50.100
Gateway 10.0.0.254
Subnet Mask 255.255.0.0
WLAN Port
IPAddress 192.168.1.100
Gateway 192.168.1.254
Subnet Mask 255.255.255.0
Security
User Name admin
Password Null(Leave it blank)
Serial
COM 9600,None, 8, 1, No flow control, buffer disabled, packet delimiter timer 1ms
Link Mode Type: TCP Server, Listen port 4660, Filter=0.0.0.0, Virtual COM disabled
SNMP
SysName of SNMP name
SysLocation of SNMP location
SysContact of SNMP contact
NOTE: Press reset button for 5 seconds to the default settings.

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3.6. Assigning New IP Address with ARP Commands
ARP (address resolution protocol) commands can be used to assign a static IP address on STW using its
hardware MAC (media access control) address. The MAC address"0060E9-xxxxxx" is printed on the rear
side of device. The following shows how it works on MS-DOS command prompt window.
Example: change IP from 10.0.50.100 to 10.0.50.101, and MAC address being 00-60-e9-00-79-f8.
Fig. 10. Assigned IP address mapping byARP Command
Tips:
1. ARP commands can only be used to set a static IP address of STW via reset user name “admin”
and default password null(Leave it blank).
2. Change to the new IP via Telnet port 1, otherwise it will fail after restart.
3.7. Auto IP (Dynamic IP)
A DHCP server can automatically assign the IP address to all the network settings with DHCP client, and
STW supports the DHCP client functions. By default, the DHCP client function on STW is disabled; you
may activate the DHCP functions by the following steps：
ÆExecute Monitor.exe
ÆClick on the IP address (of STW)
ÆClick “Config” to pop-up the static IP Dialog Window
ÆCheck ”Auto IP”
ÆClick “Config Now” (The STW will restart and obtain the IP from the DHCP server
automatically)
3.8. TCP/IP Port Number
Default Port number of STW is 4660 and it is associated with the serial port COM1. After the application
program being connected to the TCP port 4660 on the STW, data of your application program are
transparent to both serial and STW.

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4. Software Configuration
4.1. Configuration Set by Monitor.exe Utility
Use monitor.exe configuration program on the product CD to check the status of STW.
(See below), One shall change STW’s IP address, gateway IP address, subnet mask, user ID (Username)
and password from the utility. For more details see Appendix-D Configuration Utility.
Fig. 11. IP settings for Monitor.exe tool
Tip: All settings were changed if user ID or password was incorrect.
4.2. Configuration Set by Telnet Utility
One may also use Telnet utility to change configuration settings.
ÆOpen Ms-DOS command prompt window or other telnet tools
ÆEnter the “Telnet IP_address” (For example, Telnet 10.0.195.132). The system then prompts for a
password, the default password is blank.
Fig. 12. Login into System by Telnet
Then the following main menu shall appear..

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Fig. 13. Overview information by telnet
Notes:
1. If the STW does not receive any command within 1 minute, Telnet will be terminated
automatically.
2. The changes of networking parameters will take effect only after the STW is exit and restarted.
3. Select “1” from “Input choice and enter (0~5):” to enter “Overview”
4.2.1. General Information from Overview
Location: [Main]Æ[1 Overview]
This system overview window gives the general information on Ethernet & WLAN IP, MAC address,
SNMP information, kernel and AP version, and the connection status of the device.
The following overview information shall appear.
Device Information:
Model Name: STW
Device Name: [Allows for changes in SNMP settings]
Kernel Version: [Read Only, Generated by system]
AP Version: [Read Only, Generated by system]
Current Time: Allows for changes in Time Server Settings to obtain current time automatically]
Ethernet Information:
MAC: [Read Only]

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IP: [Allows for changes in Network Page]
Gateway: [Allows for changes in Auto IP of Networking Page]
Netmask: [Allows for changes inAuto IP of Networking Page]
WLAN Information:
MAC: [Read Only]
IP: Allows for changes inAuto IP of Network Page]
Gateway: [Allows for changes in Auto IP of Networking Page]
Netmask: [Allows for changes inAuto IP of Networking Page]
Default SSID: [Read only, obtain from attachedAccess Point]
Channel: [Allows for changes inAd-Hoc mode of Wireless Page]
Topology: Infrastructure [or Ad-Hoc, Allows for changes in Wireless Page]
Encryption: none [or WEP, WPA-PSK]
Connected: [SSID name, if STW is connected]
Fig. 14. System Information from Overview
This following window gives the general information on DNS Information, SNMP information, and Serial
information of the device.

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Fig. 15. System Information from Overview (Continuous)
DNS Information:
DNS1: [IP address of 1st DNS Server, Allows for changes in Auto IP of Networking Page]
DNS2: [IP address of 2nd DNS Server, Allows for changes in Auto IP of Networking Page]
DNS3: [IP address of 3rd DNS Server, Allows for changes in Auto IP of Networking Page]
SNMP Information:
SNMP Status: Enable [or Disable, Allows for changes in Networking Page]
SysName: [Allows for changes in Networking Page]
SysLocation: [Allows for changes in Networking Page]
SysContact: Allows for changes in Networking Page]
Serial Information:
Link Mode: TCP Server [or TCP Client/UDP Mode, Allows for changes in Serial Page]
Baud rate: 115200 [or 1200/2400/4800/9600...Allows for changes in Serial Page]
Parity rate: None [or Even/Odd/Space/Mark...Allows for changes in Serial Page]
Data length: 8 [or 7 (bits).Allows for changes in Serial Page]
4.2.2. Networking Settings
Operation: [Main]Æ[2 Networking]:
Select “2” on “Input choice and enter (0~5):” to enter Networking settings: