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NET101
RS232 / RS422 / RS485 to Ethernet Converter
User’s Manual
Version 1.2
Copyright Information
Copyright © 2004-2005, Mega System Technologies, Inc.
All rights reserved.
Reproduction without permission is prohibited.
Technical Support and Contact Information
Mega System Technologies, Inc.
Tel: +886-2-87922060
Fax: +886-2-87922066
Customer Service: service@megatec.com.tw
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Chapter 1: Introduction
Chapter 1: Introduction
Section 1. Features
NET101 is one of the smallest RS232/RS422/RS485 Ethernet Converter in the
market. This device provides the means to transfer serial data over the Internet
without having to make changes to your existing hardware/software. That is done by
connecting two NET101 in Master mode and Slave mode. Alternatively, a virtual
driver can be installed to control the facility over Internet.
The NET101 also could be used as a MODBUS gateway. It could convert transaction
between the MODBUS on Serial Bus and MODBUS on TCP/IP. Please refer to the
specification of MODBUS for detailed specification on MODBUS.
Some of the main features of this device are;
Firmware:
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Built-in Web Server
Support RS232 / 422 /485 (Half/Full Duplex) physical bus
Auto-detection of Ethernet bus type
Support Virtual COM port drivers from Microsoft Windows platform
Support One-on-One communication mode
Support Virtual COM port mode
Gateway between MODBUS Serial and MODBUS on Ethernet
Configuration via telnet, Web or Netility (freeware)
PPPoE and DDNS protocol for xDSL broadband connection
Serial data transfer rate up to 115kbps (19.2kbps for continuous
transmit/receive).
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Connects serial device to 10/100Mbps Fast Ethernet Network Access
Support any Web Browser for configuration
Network Protocol: HTTP server, TCP/IP, UDP, SMTP, PPPoE, Dynamic DNS,
DNS Client, SNTP, BOOTP, DHCP, FTP Server, SNMP
Hardware:
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32-Bit 50MHz RISC ARM7 TDMI CPU
System clock: 25MHz or 50MHz
Flash Memory: 512KB / 1MB / 2MB / 4MB / 8MB
Dynamic Memory: 2MB / 8MB / 16MB
LCD display shows the IP address, Subnet Mask and Gateway
Power supply: 4.8V to 7.0V, 250mA maximum.
Operating Voltage: 3.3 volts
Operating Temperature: 0°C ~ 60°C
Operating Humidity: 5% ~ 90%
Dimensions: 48mm x 63mm x 21m
Weight: 75g
For Indoor Use. Protective housing required for outdoor use
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Chapter 1: Introduction
Section 2. Networking with NET101
NET101 gives the user two options when it comes to Network connection. The user
may choose to manage and control the various serial devices over Internet using
windows Virtual COM port function (refer to Fig 1). In this configuration, a NET101 is
connected to a serial device. The user can then manage and control each of these
serial devices over LAN.
Fig.1 NET101 using a Virtual COM Port in Windows mode
To extend this further, the user may opt to have a One-on-One configuration (refer to
Fig. 2). One of these 2 NET101 needs to be configured in Master mode, and the other
is configured in Slave mode.
Fig.2 NET101 a One-on-One Communication Diagram
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Chapter 1: Introduction
Section 3. Package Contents
A standard package should contain these items;
One NET101 module
One Utility CD which contains;
1. Netility: to configure IP address and update the firmware.
2. Time Server: Time adjustment utility.
3. Adobe Acrobat 5.0 Reader.
4. User Manual
One Power Adaptor (European / USA)
Section 4. NET101 Description
Fig.3 NET101 Front View
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Chapter 1: Introduction
Section 5. NET101 DB-9 Pin Assignment
Fig.4 DB-9 Male
NET101 DB-9 PIN Assignment
RS-485
Full Duplex
RS-485
Half-Duplex
DB-9 Pin No.
RS-232
RS-422
1
2
3
4
5
6
7
8
9
DCD
RxD
TxD
DTR
GND
DSR
RTS
CTS
RI
RxD-
RxD+
TxD+
TxD-
GND
RxD-
RxD+
TxD+
TxD+ / RxD+
TxD- / RxD-
GND
TxD-
GND
Fig.5 NET101 DB-9 PIN assignment
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Chapter 1: Introduction
Section 6. NET101 Indicators
NET101 LED Status Indicators
Signal Definition Condition / Description
Power state On: Normal power
Color
Green
Red
Error Condition
Logon state
On: Error condition occurred
Orange
On: When there is Master or Driver
logon and receive the image.
Yellow
Data activity
Flash
when
there
is
data
transmission / receive by DB-9.
Fig.6 NET101 Status LED Indicator
NET101 LAN Port LED Light indicators
Condition / Description
Color
Green
On: Internet correspond speed is 100M
Flash: Data transmitting / receiving
Yellow
On: Internet correspond speed is 10M
Flash: Data transmitting / receiving
Fig.7 NET101 LAN LED Indicator
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Chapter 2: Installation Procedure
Chapter 2: Installation Procedure
Before you start using NET101, you will need to set-up both the hardware and
software. The following is a flow chart on the installation procedure:
Connect the designated serial device, power
adaptor and Ethernet cable to NET101
(Chapter 3)
Install Netility supplied in the Utility CD.
Use Netility to setup the IP (for Static IP)
(Chapter 4)
Open a standard web browser, key in the IP
and go thru the configuration in
“NET101 Web Manager”
(Chapter 5)
Set-up completed
Fig.8 NET101 installation flowchart
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Chapter 3: NET101
Chapter 3: Hardware Installation
The following details the installation procedure for NET101.
Section 1. Installation Procedure
Step 1:
Connect the DB-9 to
either a RS232 / 422 or
485 serial port of the
device.
Step 2:
Connect one end of the
Ethernet cable to a hub /
router.
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Chapter 3: NET101
Step 3:
Connect the other end of
the Ethernet cable to
NET101 Ethernet port.
Step 4:
Connect the DC adapter
power
output
into
NET101 socket, and plug
the DC adaptor into the
wall socket
Step 5:
The LCD will display the
IP, Subnet Mask and
Gateway IP. Use a WEB
browser to login into the
IP address.
Warning:
Please make sure the input Voltage and Frequency of the DC power adapter (DC
5.3V) is correct before plugging into the power outlet!
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Chapter 4: Using Netility to Setup IP & Update Firmware
Chapter 4: Using Netility to Setup IP & Update Firmware
Section 1. Installing Netility
1. Insert the Utility CD into the CD-ROM drive and execute Netility.exe
2. After installation is completed, ‘Netility’ group will appear in Windows ’Start’ Æ
‘Program Group’.
Fig.8 Netility Group
3. Click “Netility” to start the program.
Section 2. Using Netility
The Netility main menu is shown below. The selection menu is located on the left. The
device, hardware, firmware and IP address connected to a LAN are displayed on the
right.
nSelect Network card in you system
o Configure iCAMView
p Update iCAMView Firmware
q About Netility
r Conduct another search for
iCAMViews on network
Fig.9 Netility Main Menu
2.1 Network Selection
Once Netility starts-up, it will automatically search for the computer’s Network card (If
not, click on “Network Selection” on the main menu to start the search). A pop-up
window will show the available Network Adapter.
Next, select the Network Adapter, which is connected to the LAN, and click ‘OK’ to
return to the main menu. NET101 will now appear in the main menu display area.
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Chapter 4: Using Netility to Setup IP & Update Firmware
Fig.10 Netility: Network Selection
2.2 Configure
Select NET101 on the right display screen, and then click “Configure”. This will bring
up the IP Address Configuration window. Here, the user can set;
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•
IP Address
Advanced (for port setting configuration)
2.2.1 IPAddress
This section sets an IP Address for NET101. Enter your IP Address if you have a
Static IP otherwise choose Obtain an IP address by DHCP.
Fig.11 Netility: Set an IP Address for NET101
Once the IP address is set, you will be able to connect to the NET101 webpage from a
standard browser.
Obtain an IP address by DHCP or BOOTTP – the IP address, Subnet Mask and
Gateway is acquired automatically by the system.
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Chapter 4: Using Netility to Setup IP & Update Firmware
2.2.2 Advanced
In order to increase security of NET101, Netility offers two additional security features:
i.
Netility Password
Use this to set an access password for Netility.
WARNING:
Do not lose this password. If the password is lost, Netility will not be able to
perform future firmware upgrades.
ii.
Management Protocol (This function is disabled for NET101)
2.3 Upgrade Firmware
Netility offers a convenient firmware upgrade. To upgrade your firmware follow the
following procedure.
Download the latest firmware;
1. Open internet explorer and browse to;
Make sure that you choose “NET101” (Downloading the wrong firmware
may permanently damage NET101).
2. Check if the latest firmware has been released.
3. Click
to download and save the file to your local hard drive.
Upgrade NET101 firmware;
1. Open Netility,
2. Click “Download Firmware” from the Netility main menu,
3. Click , and browse to the location where you save the firmware earlier.
4. Select the new firmware file (*.bin) and,
5. Click “Start”.
Fig.12 Netility: Update NET101 firmware
The NET101 red and yellow LED will flash alternately to indicate that firmware
upgrading is in progress. Once completed, NET101 will reboot.
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Chapter 4: Using Netility to Setup IP & Update Firmware
NOTE:
If the downloading / upgrade process is interrupted or the data is corrupted, NET101
will keep its default firmware to avoid complete data loss. If this happens, repeat the
above firmware upgrade procedure.
2.4 About
This section displays the current Netility version.
Fig.13 Netility version examined
2.5 Refresh
Normally, Netility will automatically search for any NET101 connected to the LAN.
However, the user can do a manual search by click the “Refresh” icon.
Fig.14 Netility: Manually search for NET101
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Chapter 5: NET101 Web Manager
Chapter 5: Configure NET101 by WEB Browser
Section 1. Introduction
After you have setup the hardware and set an IP address for NET101, you will then be
able to go to NET101 web site to monitor, manage and control the serial devices. All
you have to do is enter the new IP address into any standard web browser.
To do this;
1. Start the Web Brower (Netscape or Internet Explore)
2. Enter NET101 IP Address that was set earlier using Netility (e.g. 211.21.67.51)
and press [ENTER]
Fig.15 Enter NET101 IP address
3. A login screen will appear, press [ENTER]. By default the username and
password is left blank.
Fig.16 NET101 Login screen
Section 2. NET101 Web Manager Interface
NET101 webpage main menu is divided into two sections. The selections menu on
the left and display menu on the right. The selection menu consists of the following
options:
2.1 Information
2.2 Configuration
2.3 Help
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Chapter 5: NET101 Web Manager
2.1 Information
Click on “System Status” to display the System Information and Network Status. The
information and values here are either provided by NET101 or were set by the users
in the “Configuration” section earlier on.
Fig.17 NET101 Information Menu
2.1.1 System Information
This section shows NET101 System Information such as the Hardware and Firmware
Version, the serial number, current / local System Time, the system name, contact,
location and uptime. These values are either provided by NET101 or set by user.
2.1.2 Network Status
This section shows NET101 Network settings. The MAC address is unique to every
NET101. All the other values are set by the user in the Configuration page.
2.2 Configuration
Please ensure that each of the following option is set correctly. Otherwise, NET101
may not work properly.
2.2.1 Network
2.2.2 WEB (User Account)
2.2.3 System Time
2.2.4 Connection
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Chapter 5: NET101 Web Manager
Fig.18 NET101 Configuration Menu
2.2.1 Network
This option determines NET101 Network settings.
i. IP Address
Fig.19 NET101 IP Address Settings
IP Address
If you want to fix the IP address, enter your chosen IP address here. Otherwise
go to “Obtain an IP address” and choose “via DHCP”
Subnet Mask
This item sets NET101 Subnet Mask. The value is normally 255.255.255.0
Gateway
This item is to set NET101 Gateway.
Obtain an IP address
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Chapter 5: NET101 Web Manager
This allows the user to choose either to set NET101 IP Address manually or via
DHCP. The above items can be set in Netility as well. NET101 will reboot after
the above settings have been changed.
ii.
DNS Server IP
Fig.20 NET101 DNS Server IP
Primary DNS Server IP
This item sets NET101 primary DNS Server IP address. Enter a value here if
you have a DNS Server IP.
Secondary DNS Server IP
This item sets NET101 secondary DNS Server IP address. NET101 will use the
secondary DNS Server IP address if the Primary DNS Server IP address is not
working.
iii.
Ethernet
Fig.21 NET101 Ethernet Settings
Connection Type
This item sets the communication speed between NET101 and the Network.
Choose “Auto Sense” to let NET101 automatically decide on the appropriate
connection speed. NET101 will reboot if this setting is changed.
iv.
Dynamic DNS
Fig.22 NET101 Dynamic DNS Settings
Service Provider
For users with a Dynamic IP, NET101 can be configured to point the current IP
(as provided by your ISP upon each successful dial-up to the internet) to a
dynamic DNS provider. This will enable you to locate NET101 every time the
IP changes due to an ADSL connection redial.
To enable this function, you will first have to register with either one of these
three service providers;
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Chapter 5: NET101 Web Manager
None (Choose this only if you have a Static IP)
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•
3322.org
dhs.org
DynDNS(Dynamic)
DynDNS(Custom)
Myddns.com
Zive.org
Domain Name
Enter the Domain Name you have created from one of the three websites.
Login Name
Enter your login name for the above domain name. You should have this when
you register with the above DDNS provider.
Login Password
Enter your password. You should have this when you register with the above
DDNS provider.
Use external STUN server to get Public IP to register
Enable/disable using the external IP for DDNS server registration. If this function
is enabled, the NET101 will get the external IP by the help of STUN server, and
then use this IP to register the IP of the DDNS server.
Primary STUN Server IP
Input the primary STUN server IP. The NET101 will use this server’s help to get
the external IP address. The default IP is 66.7.238.210.
Secondary STUN Server IP
Input the secondary STUN server IP. The NET101 will use this server’s help to
get the external IP address when the primary STUN server has no respond. The
default IP is 67.153.142.67.
v.
PPPoE
Use this option to allow NET101 to connect to the internet using your xDSL modem.
Once set-up, NET101 will be able connect to the Internet directly without going thru a
PC.
Fig.23 NET101 PPPoE setting
When Connection should be made
The user has a choice of;
Disabled
:
Default setting.
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Chapter 5: NET101 Web Manager
Connect always
:
NET101 will automatically dial up the ISP.
Login Name
Enter your login name as provided by your ISP.
Login Password
Enter your password as provided by your ISP.
2.2.2 WEB / Telnet
This section allows you to set up to eight (8) User account for NET101. Once set, a
valid username and password will have to be entered to access NET101.
i. User Account
User Name
Enter a user name here.
Password
Set a password for the account.
Permission
Determine the permission to Read/Write (Administrator) or Read only.
WARNING: You MUST set at least one User Account permission to Read/Write
(Administrator) BEFORE setting a Read Only. Failure to do so will result in you
being locked out of NET101 Web Manager!
IP Filter
To increase security, the Administrator can specify the IP address of the user
logging in. Leave “*.*.*.*” to allow the user to login from any place.
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Chapter 5: NET101 Web Manager
Fig.24 NET101 WEB / Telnet Settings
2.2.3 System Time
This section is to set and synchronize NET101 System Time with your chosen time
server.
Fig.25 System Time
Time Between Automatic Updates
This section is to set an interval for time synchronization. Select either; 1, 3, 12
hours or 1, 10 & 30 days.
Time Server
Choose the nearest Time Server to your NET101 location.
Time Zone (Relative to GMT)
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Chapter 5: NET101 Web Manager
Select the appropriate time zone for your area.
System Time (mm/dd/yyyy hh:mm:ss)
This section is to set NET101 System Time manually. The format is
pre-determined to: mm/dd/yyyy hh:mm:ss
2.2.4 Connection
This section determines the connection type for NET101.
i. Connect Status
Choose a mode for the current NET101.
Mode
Description
Master
Master mode is selected when the NET101 is used in a
one-on-one configuration with another NET101. The master
NET101 will define the communication baud rate, data length,
stop bit, etc. The slave NET101 will have the same exact
communication mode as the Master NET101.
Slave
Slave mode is selected when NET101 is used in a one-on-one
configuration with the master NET101 or when connecting to
the virtual COM port driver. The communication baud rate,
data length, stop bit and others will all follow the instructions
from the Master NET101 or the virtual COM driver.
MODBUS gateway
MODBUS gateway is selected when NET101 is used as a
gateway between the MODBUS on serial and the MODBUS
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Chapter 5: NET101 Web Manager
on TCP/IP.
For detailed information about MODBUS
gateway, please refer to the specifications of MODBUS.
Login Name
Enter the login name here when using NET101 in the Slave mode. Either the
Master NET101 or the Virtual COM port driver has to know the account and
password to use the slave NET101. The account / password is to protect against
unauthorised use of NET101 to access the serial communication data.
Login Password
Enter a login password here when using the NET101 in the Slave mode.
ii. Connection Type
Connection Status Description
RS232
RS422
RS485
To select the DB9 serial port signalling in RS232 mode.
To select the DB9 serial port signalling in RS422 mode.
To select the DB9 serial port signalling in RS485 mode.
iii. Operation Mode
Mode Type
Description
Half Duplex
To select the RS485 communication in Half Duplex
mode.
Full Duplex
To select the RS485 communication in Full Duplex
mode.
Tx Polarity
Mode Type
Normal
Description
To set the transmit data polarity in normal mode.
To set the transmit data polarity in Invert mode.
Invert
Rx Polarity
Choose
Normal
Description
To set the receive data polarity in normal mode.
To set the receive data polarity in invert mode.
Invert
Click “Apply” to confirm selection, otherwise click “Reset”
2.3 Help
2.3.1 About
Displays the following information about NET101;
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Chapter 5: NET101 Web Manager
Fig.26 Event Log
NET101 Firmware Version
Display NET101 firmware version details.
NET101 Hardware Version
Show the hardware version.
NET101 Serial Number
Shows the serial number
Manufacturers Details
Display the manufacture’s contact details.
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Appendix A: Methods to Update NET101 Firmware
Appendix A: Update NET101 Firmware
You can update NET101’s firmware using any of the following methods.
Method 1: Using Netility
(1) Use “Download Firmware” function under Netility to update it. (refer to
Section …)
Method 2: Using FTP
Windows FTP is another way to upload the latest firmware into NET101. You can
also use other FTP client software to do this. In the following example, NET101 IP
address is 192.168.50.179
(1) Click “Start” on Windows taskbar, then “Run..”, type in “ftp 192.168.50.179”
(2) Click “OK”
(3) The systems will requests for your User Name and Password. Enter “admin”
for User Name and press “Enter”. The default password is left blank.
Once the User Name and Password is verified, the server will response with
“230 OK” to indicate that Login is successful.
If you enter the wrong Username or Password, the server will response with
“530 Not Logged in”.
(4) FTP commands:
ls : This command request the server to list all files and sub-file in the current
menu. User may finds out the firmware version of the NET101 of its IP.
put <client’s file route> : This command ask the client to copy its specific file
route to the Server point. Use this to upload the latest firmware to your
NET101
quit : This command allow the user to logout and close the FTP connection.
Illustration: The picture shows, that the latest NET101 firmware file uploaded
from the local computer located in (c:\work\netagent\prjs\nag\2.32.DK520.bin)
to the NET101 with an IP address 192.168.50.179
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Appendix A: Methods to Update NET101 Firmware
Method 3: Using IE Browser
This method uses IE to update the latest firmware. Open IE, then type in the
account, password and NET101 IP address to be updated in the following format,
Once logged in, the current firmware and version will be displayed. Copy the
latest firmware to here to complete the updating process.
There are two method to log in:
Enter the password that was set earlier using Netility. Otherwise, enter
NET101’s default value:
Username: admin
Password: <blank>
The follow error message will show, when the above is entered. Ignore it and
select “Enter Identity” at the top left corner of file menu. Then enter “admin”
as the User Name and <blank> Password to re-enter.
Once the connection has been established, the following window will be
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Appendix A: Methods to Update NET101 Firmware
display. The user may then transfer the latest firmware here in order to
complete the updating steps.
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Appendix B: NET101 Virtual COM Port
Appendix B: NET101 Virtual COM Port
The NET101 could be used as a virtual COM port on your Windows system. The
virtual COM port driver is supported on the Windows2000, Windows2003 and
Windows XP. After installation the virtual COM port driver, the NET101 will be act like
a remote COM port of your system.
The installation procedure is here followed:
1. Execute the ‘Net101.exe’ in the “Net101 driver” subdirectory of the CD.
2. Open the “Device Manager” on your system.
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Appendix B: NET101 Virtual COM Port
3. Open the property of the ‘Net101 Communication Port’. In the ‘System
Configuration’, input the NET101’s IP. And set an unused COM port name in the
‘COM port number’
4. Now you could use the remote NET101 as a COM port of you computer.
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