DCB Ether Series Manuale utente
Revised March 25, 2004
Firmware Version 1.4
EtherSeries
Modbus Gateway
EMB-2
User’s Guide
FCC Statement
This device complies with the limits for a Class B digital device,
pursuant to Part 15 of the FCC rules. Operation is subject to the
following two conditions:
(1) This device may not cause harmful interference.
(2) This device must accept any interference received,
including interference that may cause undesired
operation.
CE Marking Warning
This is a class B product. In a domestic environment this
product may cause radio interference in which case the user
may be required to take adequate measures.
Copyright 2002- 2004. All rights reserved.
Version 1.0
All trademarks and trade names are the properties of their
respective owners.
i
TABLE OF CONTENTS
Chapter 1 Introduction........................................1
EtherSeries EMB-02 Functions..........................................2
Other Features......................................................................2
Physical Details....................................................................4
Configuration Switch...................................................5
LED Indicators..............................................................6
Software Requirements ...............................................7
Chapter 2 Installation..........................................9
Overview...............................................................................9
Quick Start ............................................................................9
Installation..........................................................................10
Chapter 3 Terminal/Telnet Configuration.........11
Overview.............................................................................11
Terminal Configuration.....................................................12
Procedure ....................................................................12
Telnet Management..........................................................13
Terminal/Telnet Interface.................................................15
Entering Data......................................................................16
Menu Options....................................................................16
Main Menu Option 1. Setting IP Addresses .........16
Main Menu Option 2. Set Manager/Telnet IP Address
......................................................................................18
ii
Main Menu Options 3 & 4. Serial Port Configuration
......................................................................................19
Main Menu Option 5. MODBUS TCP Configuration
......................................................................................23
Main Menu Option 6. Modbus Serial Configuration
......................................................................................25
Main Menu Option 7. Display Configuration Settings
......................................................................................28
Main Menu Option 8. Reset Configuration to Default
......................................................................................30
Main Menu Option 9. Save and Exit.......................30
Main Menu Option 0. Exit without Saving............30
Chapter 4 Browser Management......................31
Overview.............................................................................31
Connection Procedure......................................................31
Web-based Interface........................................................33
Serial Port Configuration Screen.............................34
Modbus Configuration Screen................................35
LAN Configuration Screen.......................................36
SNMP Configuration Screen....................................37
Configuration Summary Screen...............................38
Port Activity Screen..................................................39
Chapter 5 Operation..........................................39
Operation............................................................................39
Chapter 6 Troubleshooting................................40
Hardware Problems ...........................................................40
Can't Connect via the LAN..............................................41
Introduction
iii
Other Problems...................................................................43
Verify Proper Operation....................................................44
Appendix A Specifications .................................47
EtherSeries Gateway Specifications................................47
RS-232 PIN Assignments .................................................48
Control Signal Operation..................................................49
CABLES ..............................................................................51
Appendix B RS-422/ RS-485 Interface .............53
Introduction........................................................................53
Changing the Setting.................................................53
RS-422 / 4-Wire RS-485 Interface Pinout........................54
2-Wire RS-485 Interface Pinout.......................................55
RS-485 2-wire Fan-out.......................................................55
1
Chapter 1
Introduction
This chapter provides an overview of the
features and capabilities.
ongratulations on the purchase of your new EtherSeries
Modbus Ethernet Gateway. Interfaces include one
10/100BaseT ethernet interface and two RS-232/422/485 serial9-
pin interfaces.
The gateway allows serial MODBUS RTUs to communicate and
interoperate with MODBUS/TCP based controllers. The
MODBUS standard protocol is an asynchronous protocol
designed to connect directly to computer asynchronous ports.
MODBUS has been extended to operate over Ethernet using the
IP protocol suite. This gateway converts between the
MODBUS TCP/IP protocol and MOBUS ASIII/RTU protocols
transparently.
Normal operation would consist of one or more Ethernet based
computers functioning as Modbus Master and one or more
MODBUS slave devices (usually RTUs) connected serially to
the gateway.
By using RS-485, multiple MODBUS slave devices may be
connected to each of the two serial ports on the EMB-02. If
using RS-232, one MODBUS slave device may be connected to
each serial port.
C
EtherSeries EMB-02 User’s Guide
2
The EMB-02 is designed for mounting on a standard DIN rail, or
for direct mounting on a wall. For easy connection to your
LAN, the gateway supports 10BaseT or 100BaseT with auto-
sensing.
EtherSeries EMB-02 Functions
The gateway allows serial MODBUS RTUs to communicate and
interoperate with MODBUS/TCP based controllers. The
MODBUS standard protocol is an asynchronous protocol
designed to connect directly to computer asynchronous ports.
MODBUS has been extended to operate over Ethernet using the
IP protocol suite. This gateway converts between the
MODBUS TCP/IP protocol and MOBUS ASCII/RTU protocols
transparently.
The EMB-02 enables one or more MODBUS controllers to
communicate with modes ASCII/RTU based serial RTUs. It will
not allow MODBUS/TCP RTUs to operate with a serial
MODBUS controller.
Other Features
Dual Serial Ports
The EMB-02 contains two serial ports. The two serial
ports are independent, and may be used with different
hosts and different serial protocols (RTU/ASCII) as well as
different MODBUS address ranges and timeouts.
Multiple Hosts
The EMB-02 may communicate with multiple host controllers.
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