DCB EtherPoll Manuale utente
Revised October 7, 2002
Firmware Version 4.1
EtherPoll
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 200, 2002. All rights reserved.
Version 4.0
All trademarks and trade names are the properties of their
respective owners.
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TABLE OF CONTENTS
Chapter 1 Introduction ............................................1
EtherPoll Functions......................................................3
Other Features..............................................................5
Physical Details............................................................6
Configuration Switch.............................................7
LED Indicators......................................................8
Package Contents ................................................10
Software Requirements .......................................10
Chapter 2 Installation ............................................ 11
Overview....................................................................11
LAN Installation ........................................................11
Chapter 3 Terminal/Telnet Configuration........... 13
Overview....................................................................13
Terminal Configuration..............................................14
Procedure ............................................................14
Telnet Configuration..................................................15
Terminal/Telnet Interface ..........................................17
Entering Data ......................................................18
Menu Options......................................................18
Chapter 4 Browser Configuration ........................ 32
Overview....................................................................32
Connection Procedure................................................32
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Web-based Interface.................................................. 34
Port Configuration Screen .................................. 35
Port Activity Screen............................................ 36
Advanced Configuration Screen ......................... 38
LAN Configuration Screen ................................. 41
SNMP Configuration Screen .............................. 44
Configuration Summary Screen.......................... 46
Chapter 5 Configuration Security........................49
Overview ................................................................... 49
Level 0:...................................................................... 50
Level 1:...................................................................... 51
Level 2:...................................................................... 51
Level 3:...................................................................... 51
Chapter 6 Operation...............................................53
Normal Mode ........................................................... 53
Broadcast Mode ........................................................ 54
Point-to-Point Mode.................................................. 54
Chapter 7 Troubleshooting ....................................55
Hardware Problems ................................................... 55
Can't Connect via the LAN........................................ 56
Other Problems.......................................................... 58
Checking Device Operation....................................... 60
Appendix A Specifications .....................................61
EtherPoll Specifications ............................................ 61
RS-232 PIN Assignments.......................................... 62
Introduction
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Control Signal Operation ...........................................63
CABLES ....................................................................65
Appendix B Advanced Operation Information ... 67
Introduction................................................................67
Description and Behavior...........................................68
Ports used by the EtherPoll .................................68
Normal Operation Modes....................................68
Point - to - Point Mode........................................69
Broadcast Mode ..................................................69
Transmit Conditions............................................69
Application Notes ......................................................70
Protocols .............................................................70
Quick Set-Up.......................................................70
Appendix C RS-422/ RS-485 Interface ................. 71
Introduction................................................................71
Changing the Setting ...........................................71
RS-422 / 4-Wire RS-485 Interface Pinout .................72
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Chapter 1
Introduction
This chapter provides an overview of the
EtherPoll's features and capabilities.
ongratulations on the purchase of your new EtherPoll. The
EtherPoll is a SCADA communications serial server that allows
multi-drop devices to use Ethernet LAN's. The EtherPoll
connects any async serial device through a LAN and between
LAN's via routers. The EtherPoll is designed specifically to
support asynchronous polling protocols, such as Poll Select,
Modbus, DNP, etc. These protocols are often error corrected,
and the EtherPoll allows these protocols to work through routed
LANs and over IP protocol networks. The EtherPoll uses the
UDP/IP protocol, allowing the necessary data connection over
a local LAN and across routed networks.
The EtherPoll functions independently of the device protocol,
allowing most 8 bit asynchronous protocols to be used with no
configuration changes.
The EtherPoll can receive data from any Serial device, convert
the data to a valid IP packet, and transmit that data over the
LAN/WAN. Serial devices can then be accessed from anywhere
on your LAN/WAN by any workstation computer using another
EtherPoll. Two EtherPolls may be used in “nailed-up” mode
to build a “RS-232 path” through the WAN/LAN.
Most EtherPolls are used with multi-drop SCADA RTUs;
although a pair of EtherPolls configured for point-to-point
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Etherpoll User’s Guide
2
operation may be used by any async serial devices such as
alarms, access control devices, and Multiplexers.
For easy connection to your LAN, the EtherPoll supports
10BaseT or 100BaseT with autosensing.
NOTE: A similar product, the EtherPath, uses TCP/IP protocol
and may be more appropriate for some installations. If the
application is not a polled environment, the EtherPath should
be investigated.
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