Atop ABLELink GW51C-MAXI User manual

ABLELink®
GW51C-MAXI Serial Server
User Manual
Version 1.3
Updated on September, 2007
TEL: [phone]
FAX: [phone]
http://www.atop.com.tw

User manual Version 1.3
GW51C-MAXI Serial Server
Copyright © 2004 Atop Technologies, Inc.
All rights reserved. Designed in Taiwan.
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IMPORTANTANNOUNCEMENT
The information contained in this document is the property of Atop Technologies, Inc. and is supplied for
the sole purpose of the operation and maintenance of products of Atop 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 express written consent ofAtop Technologies, Inc.
Published by
Atop Technologies, Inc.
2F, No. 146, Sec. 1, Tung-Hsing Rd.
Jubei City, Hsinchu 302
Taiwan, R.O.C.
Tel: [phone]
Fax: [phone]
www.atop.com.tw
Copyright © 2004Atop Technologies, Inc.All rights reserved.
All other product names referenced herein are registered trademarks of their respective companies.

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FCC WARNING
Class A for Ethernet-Serial Server (Model GW51C-MAXI Serial Server)
This equipment has been tested and found to comply with the limits for a Class A digital device
pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable protection
against harmful interference when the equipment is operated in a commercial environment. This
equipment generates, uses and radiates radio frequency energy and, if not installed and used in
accordance with the instructions, may cause harmful interference to radio communications.
Operation of this equipment in a residential area is likely to cause harmful interference in which
case the user will be required to correct the interference at his own expenses.
A shielded-type power cord is required in order to meet FCC emission limits and also to prevent
interference to the nearby radio and television reception. It is essential that only the supplied
power cord can be used.
Use only shielded cables to connect other devices to this equipment by RS-232 / RS-485 ports.
Be cautioned that changes or modifications not expressly approved by the party responsible for
compliance could void ones authority to operate the equipment.

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Contents
1. INTRODUCTION........................................................................................................5
1.1 PACKAGING...........................................................................................................................5
1. 2 APPLICATION CONNECTIVITY.................................................................................................6
2. NOMENCLATUREAND SETTINGS......................................................................9
2.1 NOMENCLATURE OF GW51C-MAXI SERIAL SERVER COMPONENTS........................................9
2.2 MODE SWITCH.....................................................................................................................9
3. HARDWARE INSTALLATION...............................................................................10
3.1 CONFIGURATION..................................................................................................................10
3.2ASSIGNING A NEW IPADDRESS BY ARP COMMAND...............................................................10
3.3 AUTO IP..............................................................................................................................11
3.4 TCP/IP PORT NUMBER .......................................................................................................12
4. SOFTWARE CONFIGURATION...........................................................................13
4.1 CONFIGURATION SET BY MONITOR.EXE UTILITY .....................................................................13
4.2 CONFIGURATION SET BY TELNET UTILITY ..............................................................................13
4.3 CONFIGURATION SET BY HYPER TERMINAL CONSOLE UTILITY................................................23
4.4 CONFIGURATION SET BY WEB BROWSER...............................................................................24
4.5 VIRTUAL COM MODE ..........................................................................................................30
4.5.1 Setup of a virtual COM driver ...................................................................................................30
4.5.2 Virtual COM communication.....................................................................................................31
5. SNMP SETUP...........................................................................................................36
5.1 SNMP NETWORK MANAGEMENT PLATFORM ........................................................................36
5.2 USING NETWORKVIEW AS AN EXAMPLE...............................................................................36
6. START WRITING ONES OWNAPPLICATIONS...............................................38
6.1 PREPARING THE SYSTEM.....................................................................................................38
6.2 RUNNING THE SAMPLE PROGRAM........................................................................................38
6.2.1 TCPTEST in Visual Basic.........................................................................................................38
6.2.2 TCPTEST2 in Visual C .............................................................................................................39
7. DIAGNOSTICS.........................................................................................................41
7.1 USE STANDARD TCP/IP UTILITY PING COMMAND .................................................................41

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7.2 USE MONITOR.EXE CONFIGURATION UTILITY PROGRAM........................................................41
7.3 USE TCPTEST.EXE OR TCPTEST2.EXE SAMPLE PROGRAM ............................................42
APPENDIXA: GW51C-MAXI SERIAL SERVER SPECIFICATIONS................43
A.1. HARDWARE SPECIFICATIONS..............................................................................................43
A.2. SOFTWARE SPECIFICATIONS ..............................................................................................44
A.3 CONNECTOR PIN ASSIGNMENTS..........................................................................................44
A.3.1 COM Port..................................................................................................................................44
A.3.2 Ethernet Port (RJ-45)...............................................................................................................46
A.3.3 Power terminal block connector...............................................................................................47
A.4 BUZZER/LED MESSAGE......................................................................................................47
A.4.1 Buzzer ......................................................................................................................................47
A.4.2 LAN LED...................................................................................................................................47
A.4.3 COM Port LED..........................................................................................................................48
A.4.4 RUN LED..................................................................................................................................48
APPENDIX B. UPGRADE SYSTEM SOFTWARE................................................49
B.1 UPGRADE PROCEDURES.....................................................................................................49
B.2 CRITICAL ISSUES OF UPGRADING ........................................................................................50
B.3 ERROR MESSAGES.............................................................................................................50
APPENDIX C. HARDWARE CONFIGURATION...................................................52
C.1 DISABLE SYSTEM FIRMWARE ..............................................................................................52
APPENDIX D CONFIGURATION UTILITY.............................................................53
D.1 RUN THE UTILITY.................................................................................................................53
D.2 DETECT OPERATIONAL DEVICES..........................................................................................53
D.3 CONFIGURE DEVICES..........................................................................................................53

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1. Introduction
GW51C-MAXI Serial Server is a gateway between Ethernet (TCP/IP) and RS-232/RS-485
communications. The information transmitted by GW51C-MAXI Serial Server is transparent to both host
computers (Ethernet) and devices (RS-232/RS-485). Data coming from the 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
Ethernet (TCP/IP) transparently.
In the computer integration manufacturing or industrial automation area, the GW51C-MAXI Serial Server
is used for field devices to direct connect to Ethernet network. Terminal Server (main control program run
in GW51C-MAXI Serial Server) transforms whatever data received from RS-232/RS-485 to TCP/UDP port
then connect devices to the Ethernet 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 one, it is hard to transfer data through a long
distance. With GW51C-MAXI Serial Server, 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.
GW51C-MAXI Serial Server from Atop Technologies Inc. offers one RS-232/ RS-485 port, one RJ45
Ethernet and Watch-Dog Timer etc.
1.1 Packaging
 GW51C-MAXI Serial Server
 Warranty Booklet
 Quick Start Guide
 Product CD
 Mini DIN to RS-232 DB-9 Cable
Optional Accessories：
 Power Adapter with Terminal block output 12V1.25A
(1) US315-12 (US) Switching adapter
(2) US315-12 (EU) Switching adapter
UL Notice for Power supplier
All the series of GW products are intended to be supplied by a Listed Power Unit marked with “LPS”,
“Limited Power Source” or “Class 2” and output rate 9~30VDC, 0.3A minimum. Or, use the recommended
power supply in “Optional Accessories”.

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1. 2 Application Connectivity
The GW51C-MAXI Serial Server can be operated in one of the following 4 modes:
TCP Server Mode：GW51C-MAXI Serial Server can be configured in a TCP server mode on an
Ethernet Network to wait for the host computer to establish a connection with the serial device ( the client).
After the connection is established, data can flow in both directions (TCP Server Mode).
TCP Server Mode
TCP Client Mode：GW51C-MAXI Serial Server can be configured in a TCP client mode on a TCP/IP
Network to actively establish a connection with an applications server –the host computer. After the
connection is established, data can flow in both directions (TCP Client Mode)

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TCP Client Mode
UDP Mode：UDP is a fast but non-guaranteed datagram delivery protocol. GW51C-MAXI Serial Server can
be configured in a UDP mode on a TCP/IP Network to establish a connection, using unicast or broadcast
data to and from a serial device to one or multiple host computers (UDP Mode)
UDP Mode
Tunneling Mode(Pair Connection)：The tunneling mode is used for multiple serial devices to “talk”
to each other through GW51C-MAXI Serial Server’s and their Ethernet connections (Tunneling Mode).
This mode is particularly useful when two serial devices are far away, because their communication

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distance is limited to 15 m.
Tunneling Mode

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2. Hardware Description
2.1 Interface
Figure 2.1 shows the interface of GW51C-MAXI Serial Server Connectors、LEDs & the factory switch
settings.
Mode Switch
Table
LED
Indicator
Mode Switch
Serial Port
Terminal Block
Connector
Power Su
pp
l
y
In
pu
Connector
Mini-Din Pin
Assignment
UTP
Connector
Serial Port Mini
D
Connector
Figure 2.1. Front Plate of GW51C-MAXI Serial Server
2.2 MODE Switch
This sets or initializes the operating mode for the GW51C-MAXI Serial Server. The factory default setting
is that Switch 1 (SW1) and Switch 2 (SW2) are set to OFF. You can use the Mode switch to change the
operating mode from the factory default settings to your desired mode.
GW51C-MAXI Serial Server can be setup either RS-232, RS-485, RS-422 or Console configuration mode
by MODE Switch.
SW1 SW2 Mode
OFF RS-232OFF
ON CONSOLE
OFF RS-485ON
ON RS-422

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3. Installation Procedures
 Prepare necessary cables, hub, power cord and RS232/RS485 connector.
 Connect GW51C-MAXI Serial Server to Ethernet network via hub/switch or direct connect to host
computer through cross over cable.
 Connect a serial device to a serial port of GW51C-MAXI Serial Server, make sure the right connection
of either RS-232 or RS-485.
 Plug in DC9-30V, the buzzer will beep and the RUN LED will blink if GW51C-MAXI Serial Server
functions normally. Please refer to Appendix A.4 to see all of LED messages.
 Use monitor.exe configuration utility in the product CD or diskette to diagnose GW51C-MAXI Serial
Server. If it starts up successfully, you are able to find the IP and MAC addresses of GW51C-MAXI
Serial Server. One can change the network parameters of GW51C-MAXI Serial Server to join your
LAN by changing its IP address, gateway IP address and subnet mask.
3.1 Default settings
GW51C-MAXI Serial Server is shipped with default settings shown in the following table:
Property Default Value
IPAddress 10.0.50.100
Gateway 10.0.0.254
Subnet Mask 255.255.0.0
User Name admin
Password Null
COM 1 9600,None, 8, 1, No flow control, buffer disabled, packet delimiter timer 2ms
Link 1 Type: TCP Server, Listen port 4660, Filter=0.0.0.0, Virtual COM disabled
SysName of SNMP name
SysLocation of SNMP location
SysContact of SNMP contact
Note: One can press the default button to restore system settings including IP address, gateway IP
address and subnet mask etc. to the defaults. Press and hold the default button for 5 seconds till the
server reboots.
3.2 Assigning a new IP Address by ARP command
ARP –s is used to assign a static IP address of GW51C-MAXI Serial Server and add this static entries to
the ARP cache of the computer, when TCP/IP packet with destination port number 1 is sent to
GW51C-MAXI Serial Server, it causes the device to check its MAC address with IP address, once
GW51C-MAXI Serial Server finds those two unmatched, it will reboot and change to the new IP address
which was set by ARP –s command. The following example uses ARP to assign a static IP address of

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GW51C-MAXI Serial Server using its MAC address printed on the label of the rear panel, then use Telnet
to send the TCP/IP packet with destination port number 1 to GW51C-MAXI Serial Server, after
GW51C-MAXI Serial Server reboots it will change its IP address to the new one.
Notes:
1. Arp command can only be used to set a static IP address of GW51C-MAXI Serial Server using
system default user name admin and default password null.
2. Only TCP/IP packet with destination port number 1 will lead GW51C-MAXI Serial Server to reboot and
change the IP address.
3.3 Auto IP with DHCP
A DHCP server automatically assigns the IP address and network settings. GW51C-MAXI Serial Server
supports DHCP. It will supply for the unit with an IP address gateway address, and subnet mask. You may
use Monitor.exe software to search network information automatically by putting a check on Auto IP on
Dialog window.

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3.4 TCP/IP Port Number
Port number 4660 is default of GW51C-MAXI Serial Server and is associated with serial port COM1
respectively. After your application program connects to the TCP port 4660 of GW51C-MAXI Serial Server,
data being sent to this TCP connection from your application program are transparent to the COM1 of
GW51C-MAXI Serial Server. Vice versa is also true.

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4. Software Configuration
4.1 Configure by monitor.exe utility
Use monitor.exe that comes with the product CD or diskette to configure the network parameters of
GW51C-MAXI Serial Server. As you can see from the following picture, you can change IP address,
gateway IP address, subnet mask, user ID and password of GW51C-MAXI Serial Server from the utility.
For more details of the utility please refer toAppendix-D Configuration Utility.
4.2 Configure by Telnet utility
You can use Telnet utility to change configuration settings of GW51C-MAXI Serial Server. To do so, please
do the following.
Log in to the system
Using the following command Telnet to GW51C-MAXI Serial Server “Telnet IP_address”.
For example Telnet 10.0.50.100
1. After telnet to GW51C-MAXI Serial Server, system prompts for a password, the default password is
null (leave it blank).
Note: One can press the default button of GW51C-MAXI Serial Server to reset the password to the
default value.

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2. After verifying the password, the following terminal screen appears.
+
NOTE:
1. If GW51C-MAXI Serial Server does not receive any command within 1 minute, Telnet will be
terminated automatically.
2. The changes of networking parameters will take effect only when you exit and restart GW51C-MAXI
Serial Server.
3. Select “1” from “Input choice and enter (0~4):” to enter overview page as following:
This page gives one the general information of GW51C-MAXI Serial Server including IP and MAC address,
SNMP information, kernel and AP version, and connection status of the device.
Networking
Select “2” from “Input choice and enter (0~4):” to enter Networking page as following:

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This page allows one to change network settings of the device including IP address, subnet mask,
gateway IP address and SNMP information of GW51C-MAXI Serial Server. Please notice that any setting
change made on this page won’t take effect until you restart the device.
Change the password
1. Select “3” from “Input choice and enter (0~4):” the following screen appears.
2. If you want to change the password, please enter in the old password in the “Please input old
password” field, enter in the new password in the “Please input new password” and the “Please verify
new password” fields.

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Note: One can press the default key of product to reset password to the default value.
COM1 Setup
Select “4” from “Input choice and enter (0~4):” the following screen appears:
The page gives you the opportunity to configure parameters of COM1 setting which include COM1
working mode, port parameters, enabling or disabling serial buffer’s data and setting packet delimiter.
LINK1 Setup
Enter in 1 from “Input choice and enter (1~4):” of COM1, the following screen appears. Configure
GW51C-MAXI Serial Server as TCP server and the local port is 4660. IP filter is disabled by default, if IP
filter is enabled, only source IP 10.0.0.154 can connect to GW51C-MAXI Serial Server.
Note: IP filtering function is disabled if setting FILTER_IP to “0.0.0.0”.

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Configure GW51C-MAXI Serial Server as TCP client, the destination IP is 10.0.29.123, destination port is
666.

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Configure GW51C-MAXI Serial Server as UDP client, the local port is 4660, the destination IP is
10.0.29.254, destination port is 666.

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COM port setting
Enter in 2 from “Input choice and enter (1~4):” of COM1, the following screen appears, one can then give
the COM port alias name, set the baud rate and parity, determine number of data bit and stop bit, and
decide if one want to use flow control and the enter in of flow control one want to use.