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.

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