EX-9133C-2-MTCP User Manual
Operation Manual
EX-9133C-2-MTCP
Modbus TCP to Modbus RTU/ASCII Converter
Version 1.0.1
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Table of Contents
1. Introduction
Overview
………………………………………………
3
………………………………………………………
4
Package Checklist
Block Diagram
Features
……………………………………………… 4
…………………………………………………
5
………………………………………………………… 7
Product Specifications …………………………………………
2. EX-9133C-2-MTCP Description
Product Panel Views
Top Side
8
.........................…………… 10
…………………………………………… 10
………………………………………………………… 10
Right Side
………………………………………………………
3. EX-9133C-2-MTCP Installation
10
.....................…………............ 12
Power Supply(Left Side)…………………………………………… 12
Ethernet Port …………………………………………………… 12
Reset
.........……………………………………………………… 12
LED Indicators
......…………………………………………… 13
Wiring Architecture ……………………………………………… 14
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4. EX-9133C-2-MTCP Configuration
......................……… 16
Initial IP Configuration ...……………………………………… 16
Device Management Utility of EXBrowser ...…………………… 16
EXBrowser “View”& “Modify IP”…………………………...… 18
EXBrowser “Modify MAC”…………………………….......... 20
Web Browser Configuration ………………………...……….. 21
Controller Setup & Status ……………………………………… 21
Controller Parameter Setup
Controller Updated
…………………………………… 24
……………………..……………………… 29
Factory Default Setting …………………....…………………… 30
Appendix A - FAQ …….............………………........................ 31
Appendix B - Pin Outs and Cable Wiring …..…… 32
B.1 DC-In Jack
………………………………………….....…… 32
B.2 RJ-45 Pin Assignment
………………………………....…… 32
B.3 RS-232 Pin Assignment
…………………………….....…… 32
B.4 RS-232 Wiring Diagram
……………………………...…… 33
B.5 RS-422 Pin Assignment
…………………………….....…… 33
B.6 RS-422 Wiring Diagram
…………………………....……… 33
B.7 RS-485 Wiring Diagram
……………………………....…… 33
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1
Introduction
We provide new ways of connecting legacy serial devices to a Local Area Network (LAN)
or Wide Area Network (WAN). Modbus TCP/IP converters are designed to operate serial
ports over 100M bps Ethernet networks. The data is transmitted via Modbus TCP/IP
protocol. Therefore, control is available via Ethernet, Intranet and Internet.
EX-9133C-2-MTCP converter is packaged in a PVC material case well suited for
industrial environments. It provides two serial ports one is a RS-232 and another is
RS-422/485 (Auto-Detect). All serial ports operate in common industrial configuration.
EX-9133C-2-MTCP converter is a low-cost, high performance design. By carefully
selecting high quality with competitive prices components in the world, the products
made network connectivity possible with affordable cost for virtually all kinds of devices.
EX-9133C-2-MTCP is a full set converter device with two serial ports as one is a RS-232
port and another is a RS-422/485 (Auto-Detect) and it provides one socket connection
port. This operation manual will guide you step by step to learn the various functions of
the EX-9133C-2-MTCP converter.
The following topics are covered in this chapter:
□□ Overview
□□ Block Diagram
□□ Product Features
□□ Product Specifications
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Overview
EX-9133C-2-MTCP converter is designed to make your industrial serial devices
Internet ready instantly. ARM Cortex-M4 CPU of EX-9133C-2-MTCP converters makes
them the ideal choice for connecting your RS-232 and RS-422 or RS-485 serial
device—such as PLCs, meters, and sensors—to an IP-based Ethernet LAN, making it
possible for your software to access serial devices anywhere and anytime over a local
LAN or the Internet.
ARM Cortex-M4 CPU Series converters ensure the compatibility of network software
that uses a standard network API (Winsock or BSD Sockets) by providing TCP Server
Mode, TCP Client Mode, and UDP Mode. Model EX-9133C-2-MTCP provides 1
socket connection for remote management. ARM Cortex-M4 CPU Series Virtual COM
driver and software that works with COM port can be set up to work over a TCP/IP
network in no time. This excellent feature preserves your software investment and let
you enjoy the benefit of networking your serial devices instantly.
ARM-Cortex-M4 CPU series converter supports manual configuration via the handy web
browser console and many protocols including TCP, IP, UDP, HTTP, DHCP, ICMP,
and ARP. They are the best solution to network your serial devices.
Package Checklist
ARM-Cortex-M4 CPU products are shipped with the following items:
□□ 1 unit of EX-9133C-2-MTCP converter
□□ 1 unit of Power Adaptor/Supply(9V/12V/24VDC, 500mA) : Optional
□□ Din Rail Mounting Kit : Optional
□□ Quick Installation Guide in Documentation & Software CD
NOTE: Please notify your sales representative if any of the above items is missing or
damaged.
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Block Diagram
Low-cost devices usually are equipped with low speed processors and limited
memories. In reality, they have neither the capability nor practicality to manage
complicated network TCP/IP protocols. The ARM Cortex™-M4 32-bit processor
has been specifically developed to provide a high-performance, low-cost platform
for a broad range of applications including microcontrollers, automotive body
systems, and industrial control systems, networking by converting data stream
between network TCP/IP and popular serial port signals.
Instead of processing TCP/IP packets directly, devices need only deal with those
interface signals, which greatly simplifies the complexity of TCP/IP network in
linkage. The ARM Cortex-M4 processor provides outstanding computational
performance and exceptional system response to interrupt while meeting low cost
requirements through small core footprint, industry leading code density enabling
smaller memories, reducing pin count, and low power consumption.
The central core of ARM Cortex-M4 processor, based on a 3-stage pipeline
Harvard bus architecture, incorporates advanced features including single cycle
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multiply and hardware divide to deliver an outstanding efficiency of 1.25
DMIPS/MHz. The ARM Cortex-M4 processor also implements the new
Thumb®-2 instruction set architecture, which combined with features such as
unaligned data storage and atomic bit manipulation delivers 32-bit performance at a
cost equivalent to modern 8- and 16-bit devices.
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Product Features
□□ Data Conversion between RS-232 and RS-422/485 and Ethernet
EX-9133C-2-MTCP converter device (RS-232 *1 port , RS-422⁄485 *1 port )
data/signal into the Modbus TCP/IP package data/signal and send them out with the
Ethernet Data Stream; or convert the Modbus TCP/IP package data/signal into serial
device data/signal.
□□ Socket Communication
EX-9133C-2-MTCP is provided one socket connection.
□□ Dynamic IP Configuration
Support DHCP client mode, simplifying network address configuration and
management.
□□ Dual LAN Speed
Support 10/100 Mbps Ethernet, auto-detected.
□□ Server / Client Dual Modes
EX-9133C-2-MTCP converter device can be configured as network server or network
client. In the client mode, it can be installed in network which is protected by NAT
router or firewall without a real IP address.
□□ Web-based Setup
Parameters setup is based on HTTP protocol by using standard browsers (IE and
Netscape). No special software would be required.
□□ Built-in Security Control
Security protect by login password to prevent intruders.
□□ Remote Update
Firmware can be updated directly via Ethernet network to keep up with latest network
standards.
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Product Specifications
CPU : ARM Cortex™-M4 32-bit processor , 120MHz
RAM : 128K Bytes SRAM
ROM : 512K Bytes Flash ROM
Ethernet
● Port Type : RJ-45 Connector
● Speed : 10 /100 M bps ( Auto Detect )
● Protocol : HTTP, DHCP, ModbusTCP to Modbus-RTU/ Modbus-ASCII(Slave),
Modbus-RTU/ Modbus-ASCII to ModbusTCP(Slave)
● Mode : Modbus TCP Client/ Server
● Setup : HTTP Browser Setup (IE & Netscape)
● Security : Login Password
● Protection : Built-in 1.5KV Magnetic Isolation
● About..to..json; Remote IP; Report ID Support
Serial Port
● No. of Ports : RS-232*1 Port and RS-422/485(Auto-Detect) * 1 Port
● Port Type:DB9 male * 1 and Terminal Block(7pin) * 1
● Speed:300 bps∼115.2K bps
● Parity:None , Odd , Even, Mark, Space
● Data Bit:5, 6, 7, 8
● Stop Bit:1 , 2
● Port 1:
One RS-232 Signals Port:Rx , Tx , GND , RTS , CTS , DTR , DSR , DCD
● Port 2:
One RS-422 /485 Port (Auto-Detect)
RS-422 Signals:Rx+ , Rx- , Tx+ , Tx- (Surge & Over Current Protect)
RS-485 Signals : Data+ , Data- (Surge & Over Current Protection)
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Built-in RS422/RS485 Pull High-Low Resistor
Socket Port Connection:1 Connection
15KV ESD for all signal
Watch Dog Function
Virtual Support Windows 2000 /2003 / XP / Vista / 7
Firmware On-line Updated Via Ethernet
Power:DC 9 – 24V , 500mA (Terminal Block: Optional/ DC Jack: Default)
LED Lamp:
Port-1 (Red)
Port-2 (Green)
DI/DO (Red)
SYS (Green: It is a device status indicator)
Environment:
Operating Temperature:0℃∼70℃
Storage Temperature:-10℃∼80℃
Dimensions:115 * 90 * 27 mm ( W * D * H )
WEIGHT:140 gm
RoHS:Compliant with RoHS
Regulatory Approvals:FCC, CE
WARRANTY:1 year
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2
EX-9133C-2-MTCP Description & Installation
Product Panel Views
Top Side
DC-In
Power Outlet
Serial I/O Port
RS-422/485
Ethernet LAN Port
Serial I/O Port
RS-232
Reset Button
Right Side
LED Indicators
Serial I/O Port of RS-232 and RS-422/485
Connect the serial data cable between the converter device and the serial devices.
Follow the parameter setup procedures to configure the converter (see the following
chapters).
RS-422/485
RS-232
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EX-9133C-2-MTCP Installation
Power Supply(Left Side)
EX-9133C-2-MTCP converter device is powered by a single 9/12/24VDC (inner
positive/outer negative) power supply and 500mA of current. A suitable power supply
adapter is part of the packaging. Connect the power line to the power jack at the left
side of EX-9133C-2-MTCP converter device and put the adapter into the socket.
DC-In
Power Outlet
Ethernet LAN Port
Reset Button
Ethernet LAN Port
The connector for network is the usual RJ45. Simply connect it to your network
switch or Hub. When the connection is made, the LAN LED indicator will light up.
When data traffic occurs on the network, red DATA LED indicator will blink during
data transferring and receiving.
Reset Button
If by any chance, you forget the setup password, or have incorrect settings making
EX-9133C-2-MTCP converter inoperable. First, turn on the power. Second, use any
point tip to push this button and hold it about 3 seconds All the parameters will be
reset to the factory default. But do not over 5 seconds , it will enter update mode
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LED Indicators
PORT-1 (Red):
Port1 data transmitting indicator (When data are sending to the network, the LED will
blink.)
PORT-2 (Green):
Port2 data transmitting indicator (When data are sending to the network, the LED will
blink.)
DI/DO (Red):
Data input/output indicator (When data are input/output by the network, the LED will
blink.)
SYS (Green):
It is a device statues indicator (When EX-9133C-2-MTCP is operated in normal
statues, the LED will blink once per second.)
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Wiring Architecture
RS-232 Wiring Architecture
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RS-422/RS-485 Wiring Architecture
When you finish the steps mentioned above and the LED indicators are as shown in above
diagram, the converter is installed correctly.
You can use the Setup Tool “EXBrowser.exe”
to setup the IP Address.
To proceed the advanced parameter setup, please use a web browser (IE or Netscape) to
continue the detailed settings.
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4
EX-9133C-2-MTCP Converter Configuration
Initial IP Configuration
When sett up your converter for the first time, the first thing you should do is to configure
the IP address. This chapter introduces the method to configure the device server’s IP
address.
For more details about network settings, please see the Network Settings section
in Chapter 4, “Web Browser Configuration”.
The following topics are covered in this chapter:
□□ Device Management Utility of EXBrowser
□□ EXBrowser “View”
□□ EXBrowser “Modify IP”
□□ EXBrowser “Modify MAC”
Device Management Utility of EXBrowser
On PC we provide a Device Management Utility named “EXBrowser.exe” which is an
executable program in Windows 32-bit environments. EXBrowser setup tool is used to
detect and setup the installed converters. It uses UDP broadcast packets to query and
configure converters on the network.
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When you activate the tool, it will detect the existence of the installed converters and
depict the converters’ status such as IP address, Subnet Mask, MAC Address, and
Device ID (see Figure 4.1).
The Setup Tool only can setup one converter at a time.
Thus if there are more than one converter on the network, please shut down or
disconnect other converters. Otherwise the EXBrowser.exe can not detect the converter.
Due to the nature of broadcast UDP packets, EXBrowser has following characteristics:
□□ Broadcast packets are not limited by subnet. Even if the IP address of the converters
and the computer running EXBrowser that do not belong to the same subnet, it still
works fine.
□□ Broadcast packets can not pass routers. EXBrowser can only be used to monitor
devices with computer running EXBrowser in the same segment of local area
network.
(Figure 4.1)
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EXBrowser “View”
□□ View -> Refresh
There are two ways for refreshing the status of existing devices. You may
select the item “View” to refresh the status of existing devices on LAN.
Another is to click the icon as red color remark as below. EXBrowser will send
another query to get updated information. (see Figure 4.2).
Note: Always run the “Refresh” after any data change.
(Figure 4.2)
□□ File -> Exit
Alt+F4
Exit from the program (see Figure 4.3).
(Figure 4.3)
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EXBrowser “Modify IP”
□□ Modify IP -> Dialog Frame
To click the device on the existing devices list in the EXBrowser table and then the
function bar will be enable. To press second icon of “Modify IP” on function bar
and a dialog frame table will be shown (see Figure 4.4).
(Figure 4.4)
Assign an IP Address with the same Subnet Mask of your computer, avoiding any
IP conflict with other network devices.
When you press “Confirm” button, the IP address will be refreshed in 2~3 seconds.
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(Figure 4.5)
After click “Confirm” button and then “Input Password” request will be pop-up on
screen (see Figure 4.5). Please simply press “Confirm” button and the new device’s
IP will be changed and save in table, if you changed it.
(Figure 4.6)
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EXBrowser “Modify MAC”
□□ Modify MAC -> Dialog Frame
To click the device on the existing devices list in the EXBrowser table and then the
function bar will be enabled. To press Third icon of “Modify MAC” on function
bar and a dialog frame table will be shown (see Figure 4.7).
(Figure 4.7)
□□ Input Password -> Dialog Frame
After click “Confirm” button and then “Input Password” request will be pop-up on
screen (see Figure 4.8). Please simply press “Confirm” button and the new device’s
MAC will be changed and save in table, if you changed it.
(Figure 4.8)
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Web Browser Configuration
The following topics are covered in this chapter:
□□ Serial To Ethernet Converter Setup
●
Login Setting
●
Login Setting Page Field Description
●
Parameter Setting
●
Parameter Setting Page Field Description
Login Setting
In addition to basic IP address and subnet mask, specific device settings can be set
through HTTP protocol with popular browsers, e.g. Internet Explorer, Netscape,
etc. Setup of the converters is as easy as surfing on WWW, no special software
will be required.
Setup converter device is as easy as surfing on WWW; no special software will be
required. Popular Browsers, such as IE, or Netscape, can easily do the setup
process. In the browser URL field, set the IP address of device directly, to enter
the “Login Setting” page, please follow the steps below.
□□ Open your browser. This chapter will use IE as an example.
□□ In the browser URL field, type the IP address of the converter directly and
press ENTER. (The IP address is what you set using the Device Management
Utility as EXBrowser.)
□□ To press fourth icon of “Web Browser” on function bar and a “Login
Setting” Screen will be shown (see Figure 4.9) to login into the device.
Alternatively, if the IP address of the converter is already known, you can
connect to the converter directly by providing its IP address in the URL field
of browsers.
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(Figure 4.9)
Login Setting Page Field Description
□□ System time elapsed
The time elapsed since start of this device in [Day Hour : Minute : Second]
format. This information can be useful in identifying the reliability of system.
□□ Firmware version
Converter firmware is identified by date code. This information will be required
looking for technical support.
□□ Serial number
It is a product serial number code in the converter device and has been provided
by factory.
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□□ Ethernet MAC Address
Converter is a unique MAC (Media Access Control) address used by Ethernet.
□□ Password
This field is the administration password for authentication. Factory default is
“empty”. However, it is not recommended to leave it empty in field operation.
If you could not login, it means you have to key in the password. If you do not
know the password you can “Reset” this converter(First, turn on the power. Second, use
any point tip to push this button and hold it about 3 seconds All the parameters will be reset
to the factory default. But do not over 5 seconds , it will enter update mode).
Converter device uses the same password protection mechanism commonly
used in Windows NT or UNIX. If there are more than “3 consecutive failures”
in password check during login, the login function will be disabled for “15
minutes”. During this 15 minutes period, even if you supply correct password,
login will not proceed. This prevents intruders from finding the password by
computer generated program.
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Parameter Setting Page
□□ The Parameter Setting Page
Type the correct password in the “Password” field and click the “Confirm”
button in the “Login Setting” page, then the “Parameter Setting” page will be
shown (see Figure 4.10).
Note: If you forget the password or can’t login successfully, please contact the
manufacturer directly.
(Figure 4.10)
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□□ Parameter Setting Page Field Description
□□ IP Address
The IP address of converter device, 4 digits separated by '.'
conflict with the other devices on the network.
Don’t let it
If DHCP client mode is enabled and there's a DHCP server on the network, this
field will be assigned by DHCP server automatically.
□□ Subnet mask
Subnet mask of the converter device has connected to. “255.255.255.0” is
usually used for small network, “255.255.0.0” for larger network, 4 digits
separated by '.'
If your IP address is provided by an ISP or the internal network administrator,
please inquire of them that information and type it correctly.
If DHCP client mode is enabled and there's a DHCP server on the network, this
field will be assigned by DHCP server automatically.
□□ Gateway address
Gateway or Router IP address. 'Gateway' is a device which connects local
network to external network. If you need to communicate with other networks
or your device owns a real IP address on the internet, please inquire of them that
information and type it correctly. If there's no gateway on the network, just
leave it as “0.0.0.0”.
If DHCP client mode is enabled and there's a DHCP server on the network, this
field will be assigned by DHCP server automatically.
□□ DHCP client
DHCP client mode could be enabled/disabled status. If DHCP is enabled, there
should be a DHCP server on the network. If DHCP is disabled, [IP address],
[Subnet mask], and [Gateway address] should be manually assigned.
□□ Auto Reset(Reboot)
It is for resetting when the device has been disconnected or some reasons, the
data stop transmitting for a while. You can prevent it and restart the device after
waiting a while (1∼255 Minute) as your settings.
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□□ Login Password
For security and management issues, you may setup the “Login Password”.
This administration password uses to login converter parameter setting pages. It
may be empty or up to 15 characters long.
□□ Serial I/O Port 1 (RS-232)
This converter device model provides one serial port as RS-232 interface for
connecting the extension serial device.
□□ Local Port ⁄ Socket Mode ⁄ Remote IP & Port
This converter devoice provides one socket connection port.
□□ Port number
A socket port assigned for the serial port. It’s a 16-bit numbers,
ranging from 1 to 65535. Because the numbers below 1000 are used for
specific purposes (e.g. 80 is for HTTP protocol), we suggest you use
the numbers larger than 1000. Generally the port number 4660 is used
for the serial communication. However you should specify different
port number for each serial port.
□□ Socket type
Modbus TCP Server: Modbus TCP protocol, passive open, to be
connected from the Modbus TCP clients.
□□ Remote IP address
The server IP address and socket port would be connected in Modbus
TCP Client mode for a certain serial port .
□□ Remote socket port
The server socket port would be connected in Modbus TCP Client
mode for a certain serial port.
□□ Interface of serial I/O
RS232:TxD, RxD for data stream, no flow control
RS232 (RTS/CTS):TxD, RxD for data stream, RTS/CTS for flow
control.
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□□ Baudrate
Baud Rate: 300 ~ 115.2K bps
□□ Parity, Data bits, Stop bit
Parity: None, Even, Odd, Space, Mark.
Data Bits: 5, 6, 7, 8.
Stop Bit: 1 or 2.
□□ Force off-line time(Close the Socket)
It is for setting the off-line time period of device will be taken when
there is no date input. The parameter can be from “1 to 255” and the
time unit is “Minute”.
□□ Packet Collect Time
It is for setting a packet collecting period of the device serial port’s Tx
and Rx. The parameter can be from “0 to 999” and the time unit is
“mSec”.
□□ Modbus type
It is for setting the ModbusTCP to Modbus-RTU/Modbus-ASCII
or Modbus-RTU/Modbus-ASCII to ModbusTCP
□□ Serial I/O Port 2 (RS-422/485)
This converter device model is provided second serial port as RS-422/485
(Auto-Detect) interfaces for connecting the extension serial device.
□□ Local Port ⁄ Socket Mode ⁄ Remote IP & Port
This converter device provides one socket connection port.
□□ Port number
A socket port is assigned for the serial port. It’s a 16-bit numbers,
ranging from 1 to 65535. Because the numbers below 1000 are used for
specific purposes (e.g. 80 is for HTTP protocol), we suggest you use
the numbers larger than 1000. Generally the port number 4660 is used
for the serial communication. However you should specify different
port number for each serial port.
□□ Socket type
Modbus TCP Server: Modbus TCP protocol, passive open, to be
connected from the Modbus TCP clients.
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□□ Remote IP address
The server IP address and socket port would be connected in Modbus
TCP Client mode for a certain serial port.
□□ Remote socket port
The server socket port would be connected in Modbus TCP Client mode
for a certain serial port.
□□ Interface of serial I/O
It provides an “Auto Detect” function and just depends on the
connected serial device’s interface as RS-422 or RS-485.
□□ Baudrate
Baud Rate: 300 ~ 115200 bps
□□ Parity, Data bits, Stop bit
Parity: None, Even, Odd, Space, Mark.
Data Bits: 5, 6, 7, 8.
Stop Bit: 1 or 2.
□□ Force off-line time(Close the Socket)
It is for setting the off-line time period of device will be taken when
there is no date input. The parameter can be from “1 to 255” and the
time unit is “Minute”.
□□ Packet Collect Time
It is for setting a packet collecting period of the device serial port’s Tx
and Rx. The parameter can be from “0 to 999” and the time unit is
“mSec”.
□□ Modbus type
It is for setting the ModbusTCP to Modbus-RTU or Modbus-ASCII
or Modbus-RTU/Modbus-ASCII to ModbusTCP
□□ Interface of serial I/O
RS-485 (Half-duplex): Half-duplex RS-485 interface, RTS for
driver enable/disable
RS-422 (Full-duplex): Full-duplex RS-422 interface
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Controller Updated
Press “Update” Button after finish the detailed parameter setting. The converter
will save all parameters into internal non-volatile memory and then reboot (see
Figure 4.11). It takes about 5 seconds to complete the whole process, and a new
login page will be presented (see Figure 4.9).
(Figure 4.11)
You can re-login and check if all parameters have been correctly saved. If
everything is ok, you can close the browser now.
Note : If the domain of the converter is different from that of the computer
running the browser, the login page won’t appear unless the converter’s
“Gateway Address” has been correctly set.
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Factory Default Setting
If you forget the setup password or have incorrect settings making the converter
inoperable, there are two ways to reset the setting and the following procedures
can be used to reset all settings to factory default:
A:
1. Please turn on the power and then use any point tip to push “Reset” button
for 5 seconds. The password will be reset to the factory default as
“empty”.
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Appendix A
FAQ
Q. Why can’t the EXBrowser.exe detect the converter on the network?
A. Please check
□□ if the power is properly plugged to the converter.
□□ if the network cable is properly connected between the converter and the Hub.
Please refer to the “Hardware Installation” steps in Chapter 3.
Q. Why can’t I use IE to setup the converter?
A. Please check if the network domain of your PC is the same as that of the converter.
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Appendix B
Pin outs and Cable Wiring
□□ DC-In Jack
□□ RJ-45 Pin Assignment
□□ RS-232 Pin Assignment
The pin assignment scheme for a 9-pin male connector on a DTE is given
below.
PIN 1 : N/A
PIN 2 : RXD
PIN 3 : TXD
PIN 4 : DTR
PIN 5 : GND
PIN 6 : DSR
PIN 7 : RTS
PIN 8 : CTS
PIN 9 : N/A
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□□ RS-232 Wiring Diagram
EX-9133C-2-MTCP
Serial Device
2 RX
3 TX
5 GND
7 RTS
8 CTS
3
2
5
8
7
TX
RX
GND
CTS
RTS
□□ RS-422 Pin Assignment
The pin assignment scheme for a 4-pin RS-422 is given below.
1
PIN 1 : T+
2
3
4
PIN 2 : T-
PIN 3 : R+
PIN 4 : R-
□□ RS-422 Wiring Diagram
EX-9133C-2/ PoE
Serial Device
RR+
TT+
2 T1 T+
4 R3 R+
□□ RS-485 Wiring Diagram
EX-9133C-2/ PoE
Serial Device
D+
1
D+
D-
2
D-
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