Allen-Bradley ControlLogix User manual

User
Manual
ControlLogix
Data Highway Plus/
Remote I/O
Communication
Interface Module
Allen-Bradley

Important User Information Solid state equipment has operational characteristics differing from
those of electromechanical equipment. “Safety Guidelines for the
Application, Installation and Maintenance of Solid State Controls”
(Publication SGI-1.1) describes some important differences between
solid state equipment and hard-wired electromechanical devices.
Because ofthisdifference, and also because of the wide variety ofuses
for solid state equipment, all persons responsible for applying this
equipment must satisfy themselves that each intended application of
this equipment is acceptable.
In no event will the Allen-Bradley Company be responsible or liable
for indirect or consequential damages resulting from the use or
application of this equipment.
The examples and diagrams in this manual are included solely for
illustrative purposes. Because of the many variables and requirements
associatedwithanyparticularinstallation,theAllen-BradleyCompany
cannot assume responsibility or liability for actual use based on the
examples and diagrams.
Nopatentliabilityisassumedby Allen-BradleyCompanywith respect
touseofinformation,circuits,equipment,orsoftwaredescribedinthis
manual.
Reproductionofthecontentsofthismanual,inwholeorinpart,without
written permission of the Allen-Bradley Company is prohibited.
Throughout this manual we use notes to make you aware of safety
considerations.
Attentions help you:
•identify a hazard
•avoid the hazard
•recognize the consequences
Important: Identifies information that is especially important for
successful application and understanding of the product.
Ethernet is a registered trademark of Digital Equipment Corporation, Intel and Xerox Corporation.
Microsoft is a registered trademark of Microsoft Corporation.
Windows, Windows 95 and Windows NT are trademarks of Microsoft Corporation.
ControlLogix and Data Highway Plus are trademarks of the Allen-Bradley Company, Inc.
!
ATTENTION: Identifiesinformationaboutpracticesor
circumstances that can lead to personal injury or death,
property damage, or economic loss.

Publication 1756-6.5.14 - August 1998
Preface
About This User Manual
What This Preface Contains This preface describes how to use this manual. The following table
describes what this preface contains and its location.
Who Should Use this Manual We assume you have a good understanding of the Data Highway Plus
protocol and Remote I/O. This user manual contains a brief
description of Data Highway Plus in Chapter 2 and a brief description
of Remote I/O in Chapter 7.
Purpose of This Manual This manual describes how to understand, configure and troubleshoot
your ControlLogix Data Highway Plus/Remote I/O communication
interface module.
For installation information, refer to the ControlLogix Data Highway
Plus Communication Interface Module Installation Instructions,
publication 1756-5.4.
For information about: See page:
Who Should Use This Manual P-1
Purpose of This Manual P-1
Conventions and Related Terms P-2
Related Products and Documentation P-4
Rockwell Automation Support P-4

Publication 1756-6.5.14 - August 1998
P-2 About This User Manual
Conventions and Related Terms This manual uses the following conventions:
This icon: Calls attention to:
helpful, time-saving information
an example
additional information in the
publication referenced
TIP
Example
For more information . . .

Publication 1756-6.5.14 - August 1998
About This User Manual P-3
Terms
This term: Means:
bridge an internetwork node between two similar communication
subnets where protocol translation isminimal
ControlLogix Gateway
Configuration tool software that provides manual configuration capability for the DH+ module
communication module 1756-DHRIO module
connection a logical communication path
DH+TM Data Highway Plus - A-B’s proprietary token pass
communications protocol for peer to peer communications
Etherneta physical layer standard using Carrier Sense Multiple Access
with Collision Detection (CSMA/CD) methods
Ethernet network a local area network with a baseband communication rate of
10M bps designed for the high-speed exchange of information
between computers and related devices
gateway a module or set of modules that allows communications
between nodes on dissimilar networks
indicator LED indicator
link a unique network
module address a six-bit number used to uniquely identify any module on the
local and extended ControlLogix backplane
PCCC programmable controller communications commands
rack a physical and logical collection of application modules sharing
a common power supply and backplane for module to module
communication
RIUP remove and insert under power
transaction an exchange of request and data and response and data
transfer to send a message to the next destination

Publication 1756-6.5.14 - August 1998
P-4 About This User Manual
Related Products and
Documentation The following table lists related ControlLogix products and
documentation:
If you need more information on these products, contact your local
Allen-Bradley integrator or sales office for assistance. For more
information on the documentation, refer to the Allen-Bradley
Publication Index, publication SD499.
Rockwell Automation Support Rockwell Automation offers support services worldwide, with over
75 sales/support offices, 512 authorized distributors and 260
authorized systems integrators located throughout the United States
alone, plus Rockwell Automation representatives in every major
country in the world.
Local Product Support
Contact your local Rockwell Automation representative for:
•sales and order support
•product technical training
•warranty support
•support service agreements
Technical Product Assistance
If you need to contact Rockwell Automation for technical assistance,
please review the troubleshooting information in Appendix A first. If
problem persists, then call your local Rockwell Automation
representative.
Your Questions or Comments on this Manual
If you find a problem with this manual, please notify us of it on the
enclosed Publication Problem Report.
Catalog
number: Document title: Publication number:
1756-DHRIO Data Highway Plus Communication Interface Module
Installation Instructions 1756-5.4
1756-GTWY ControlLogix Gateway Configuration Tool Quick Start 1756-10.2

Table of Contents
Publication 1756-6.5.14 - August 1998
ControlLogix Data Highway Plus/
Remote I/O Communication
Interface Module
Chapter 1
What the Module Does . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Routing Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
DH+ and CIP Messaging . . . . . . . . . . . . . . . . . . . . 1-2
Remote I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Module Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Setting Switches . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Alphanumeric Indicators . . . . . . . . . . . . . . . . . . . . 1-6
Compliance to European Union Directives . . . . . . . . . . 1-6
EMC Directive . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Low Voltage Directive . . . . . . . . . . . . . . . . . . . . . 1-7
Preventing Electrostatic Discharge . . . . . . . . . . . . . . . . 1-7
Removal and Insertion Under Power . . . . . . . . . . . . . . . 1-8
Chapter Summary and What’s Next . . . . . . . . . . . . . . . 1-8
Basics of Using Data
Highway Plus Chapter 2
What is Data Highway Plus . . . . . . . . . . . . . . . . . . . . . . 2-1
Selecting Devices that You Can Connect . . . . . . . . . . . 2-1
Link Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Programming Terminal Port . . . . . . . . . . . . . . . . . . . . . 2-2
Application Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Chapter Summary and What’s Next . . . . . . . . . . . . . . . 2-3
DH+ Operation Chapter 3
Two Methods of Communication Over
Data Highway Plus . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Using DH+ Messaging . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Benefits of DH+ Messaging . . . . . . . . . . . . . . . . . . . . . 3-2
Local DH+ Messaging . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Receiving Local DH+ Messages on DH+ . . . . . . . 3-3
Sending Local DH+ Messages on DH+ . . . . . . . . 3-3
Limitations of Local DH+ Messaging . . . . . . . . . . 3-4
Routing Error in Local DH+ Messaging . . . . . . . . 3-5
Before Programming in a Controller . . . . . . . . . . . . . . . 3-5
Remote DH+ Messaging . . . . . . . . . . . . . . . . . . . . . . . . 3-6
Limitations of Remote DH+ Messaging . . . . . . . . 3-9
Routing Errors in Remote DH+ Messaging . . . . . 3-9
Configuration Information in DH+ Messaging . . . . . . 3-10
Generating Configuration Faults . . . . . . . . . . . . . 3-10
Application Timeout . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11

toc–ii Table of Contents
Publication 1756-6.5.14 - August 1998
Example of an Application Timeout . . . . . . . . . . 3-11
Example DH+ Routing Configuration . . . . . . . . . . . . . 3-12
Using Control and Information
Protocol (CIP) Messaging . . . . . . . . . . . . . . . . . . . . 3-13
Limitations of CIP Messaging . . . . . . . . . . . . . . . 3-14
Chapter Summary and What’s Next . . . . . . . . . . . . . . 3-14
Programming Terminal
Operation Over DH+ Chapter 4
Connecting Your Programming Terminal
Over DH+ Using RSLogix 5 . . . . . . . . . . . . . . . . . . . 4-1
Connecting Your Programming Terminal
Over DH+ RSLogix 500 . . . . . . . . . . . . . . . . . . . . . . 4-2
Connecting Your Programming Terminal
Over DH+ Using RSLogix 5000 . . . . . . . . . . . . . . . . 4-3
Defining Connection Paths . . . . . . . . . . . . . . . . . . . . . . 4-5
Connection path examples . . . . . . . . . . . . . . . . . . . 4-6
Chapter Summary and What’s Next . . . . . . . . . . . . . . . 4-9
PLC-5 or SLC-5/04 to PLC-5 or
SLC-5/04 Messaging Chapter 5
DH+ Messaging Between PLC-5s With
One 1756-DHRIO Module . . . . . . . . . . . . . . . . . . . . . 5-2
Set the Module Switches . . . . . . . . . . . . . . . . . . . . 5-3
Set-Up a Routing Table for the1756-DHRIO Module 5-3
Configure Message Instructions . . . . . . . . . . . . . . 5-4
DH+ Messaging Between SLC-5/04s With
Two 1756-DHRIO Modules With One
ControlLogix Chassis . . . . . . . . . . . . . . . . . . . . . . . . . 5-5
Set the Module Switches . . . . . . . . . . . . . . . . . . . . 5-6
Set-Up a Routing Table for the First
1756-DHRIO Module . . . . . . . . . . . . . . . . . . . . 5-7
Set-Up a Routing Table for the Second
1756-DHRIO Module . . . . . . . . . . . . . . . . . . . . 5-7
Configure Message Instructions . . . . . . . . . . . . . . 5-8
DH+ Messaging Between PLC-5s With
Multiple ControlLogix Chassis . . . . . . . . . . . . . . . . . 5-9
Set the Module Switches . . . . . . . . . . . . . . . . . . . 5-10
Set-Up a Routing Table for the First
1756-DHRIO Module . . . . . . . . . . . . . . . . . . . 5-11
Set-Up a Routing Table for the Second
1756-DHRIO Module . . . . . . . . . . . . . . . . . . . 5-11
Configure Message Instructions . . . . . . . . . . . . . 5-12
DH+ Messaging From PLC-5 to PLC-5/C
on ControlNet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-13
Set the Module Switches . . . . . . . . . . . . . . . . . . . 5-14
Set-Up a Routing Table for the
1756-DHRIO Module . . . . . . . . . . . . . . . . . . . 5-15
Configure Message Instructions . . . . . . . . . . . . . 5-16
Chapter Summary and What’s Next . . . . . . . . . . . . . . 5-16

Table of Contents toc–iii
Publication 1756-6.5.14 - August 1998
PLC-5 or SLC-5/04 to Logix5550
Messaging Chapter 6
DH+ Messaging From a PLC-5 to One Logix5550
With One ControlLogix Chassis . . . . . . . . . . . . . . . . 6-2
Set the Module Switches . . . . . . . . . . . . . . . . . . . . 6-3
Set-Up a Controller Slot for the
1756-DHRIO Module . . . . . . . . . . . . . . . . . . . . 6-4
Configure Message Instructions . . . . . . . . . . . . . . 6-5
DH+ Messaging From a PLC-5 to Multiple
Logix5550s With One ControlLogix Chassis . . . . . . 6-6
Set the Module Switches . . . . . . . . . . . . . . . . . . . . 6-7
Set-Up a Controller Slot for the
1756-DHRIO Module . . . . . . . . . . . . . . . . . . . . 6-8
Set-Up a Routing Table for the
1756-DHRIO Module . . . . . . . . . . . . . . . . . . . . 6-9
Configure Local Message Instructions . . . . . . . . 6-10
Configure Remote Message Instructions . . . . . . . 6-11
DH+ Messaging From a SLC-5/04 to a Logix5550
With Multiple ControlLogix Chassis . . . . . . . . . . . . 6-12
Set the Module Switches . . . . . . . . . . . . . . . . . . . 6-13
Set-Up a Routing Table for the
1756-DHRIO Module . . . . . . . . . . . . . . . . . . . 6-14
Configure Message Instructions . . . . . . . . . . . . . 6-15
Chapter Summary and What’s Next . . . . . . . . . . . . . . 6-16
Logix5550 to PLC-5 or SLC-5/04
Messaging Chapter 7
Local DH+ Messaging From a Logix5550 to
a PLC-5 With One ControlLogix Chassis . . . . . . . . . 7-2
Set the Module Switches . . . . . . . . . . . . . . . . . . . . 7-3
Configure Message Instructions . . . . . . . . . . . . . . 7-4
DH+ Messaging From a Logix5550 to a PLC-5
With Multiple ControlLogix Chassis Over DH+ . . . . 7-5
Set the Module Switches . . . . . . . . . . . . . . . . . . . . 7-6
Set-Up a Routing Table for the First
1756-DHRIO Module . . . . . . . . . . . . . . . . . . . . 7-7
Set-Up a Routing Table for the Second
1756-DHRIO Module . . . . . . . . . . . . . . . . . . . . 7-7
Configure Message Instructions . . . . . . . . . . . . . . 7-8
DH+ Messaging From a Logix5550 to a SLC-5/04
Over ControlNet and DH+ With Multiple
ControlLogix Chassis . . . . . . . . . . . . . . . . . . . . . . . . . 7-9
Set the Module Switches . . . . . . . . . . . . . . . . . . . 7-10
Set-Up a Routing Table for the
1756-DHRIO Module . . . . . . . . . . . . . . . . . . . 7-11
Configure Message Instructions . . . . . . . . . . . . . 7-12
Chapter Summary and What’s Next . . . . . . . . . . . . . . 7-13

toc–iv Table of Contents
Publication 1756-6.5.14 - August 1998
Logix5550 to Logix5550
Messaging Chapter 8
CIP Messaging Between a Logix5550 and
a Logix5550 Over One Link . . . . . . . . . . . . . . . . . . . 8-2
Set the Module Switches . . . . . . . . . . . . . . . . . . . . 8-3
Configure Message Instructions . . . . . . . . . . . . . . 8-4
CIP Message Routing Between a Logix5550 and
a Logix5550 Over Two Links . . . . . . . . . . . . . . . . . . 8-5
Set the Module Switches . . . . . . . . . . . . . . . . . . . . 8-6
Configure Message Instructions . . . . . . . . . . . . . . 8-7
Chapter Summary and What’s Next . . . . . . . . . . . . . . . 8-8
Basics of Using Remote I/O Chapter 9
Introduction to Remote I/O . . . . . . . . . . . . . . . . . . . . . . 9-1
Selecting Devices That You Can Connect . . . . . . . . . . . 9-2
Designing a Remote I/O Network . . . . . . . . . . . . . . . . . 9-3
Network Design Guidelines . . . . . . . . . . . . . . . . . 9-3
Cable Design Guidelines . . . . . . . . . . . . . . . . . . . . 9-3
Configuring a DHRIO Channel as a RIO Scanner . . . . 9-5
Chapter Summary and What’s Next . . . . . . . . . . . . . . . 9-6
Communicating with Remote I/O Chapter 10
DHRIO Module Operation . . . . . . . . . . . . . . . . . . . . . 10-1
Exchanging I/O Data Between Adapters on
the RIO Link and the 1756-DHRIO Module . . 10-2
Exchanging I/O Data Between the Logix5550
and the 1756-DHRIO Module . . . . . . . . . . . . . 10-2
I/O Configuration Tree in Controller Organizer
in RSLogix 5000 . . . . . . . . . . . . . . . . . . . . . . . 10-3
RIO Scanner Status . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-3
Adapter Module I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-3
Setting the Rate of Data Exchange Between the
Logix5550 and the 1756-DHRIO Module . . . . . . . . 10-4
Requested Packet Interval (RPI) . . . . . . . . . . . . . 10-4
RIO Scanner Status Update Rate With the
1756-DHRIO in a Local Chassis . . . . . . . . . . . 10-4
RIO Scanner Status Update Rate With the
1756-DHRIO Module in a Remote Chassis . . 10-4
Setting the Rate of I/O Data Exchange Between
the Logix5550 and the 1756-DHRIO Module . . . . . 10-5
Minimum Requested Packet Intervals (RPIs) . . . 10-6
Adapter Module I/O Update Rate with
the 1756-DHRIO Module in the Local Chassis 10-7
Adapter Module I/O Update Rate with the
1756-DHRIO Module in the Remote Chassis . 10-8
RIO Scanner Failure Notification . . . . . . . . . . . . . . . . 10-9
RIO Adapter Failure Notification . . . . . . . . . . . . . . . . 10-9
Inhibiting the DHRIO Module Connections . . . . . . . 10-10

Table of Contents toc–v
Publication 1756-6.5.14 - August 1998
Inhibiting an RIO Connector Adapter . . . . . . . . . . . . 10-10
Increased Remote I/O System Throughput . . . . . . . . 10-11
Sending Block Transfer Data . . . . . . . . . . . . . . . . . . . 10-12
Block Transfer Notification . . . . . . . . . . . . . . . . . . . . 10-12
Block Transfer ‘Pass-Through’ Messages . . . . . . . . . 10-13
Troubleshooting Remote I/O
Communication Difficulties . . . . . . . . . . . . . . . . . . 10-14
Chapter Summary and What’s Next . . . . . . . . . . . . . 10-16
Connecting a Logix5550 to
Remote I/O Chapter 11
Scanning Remote FLEX Adapter Through a
1756-DHRIO Module in a Local 1756-Chassis . . . . 11-2
Set the Module Switches . . . . . . . . . . . . . . . . . . . 11-3
Configure DHRIO Module . . . . . . . . . . . . . . . . . 11-3
Configure the FLEX Adapter . . . . . . . . . . . . . . . 11-4
Scanning Remote FLEX Adapters Through
Multiple 1756-DHRIO Modules in a Local Chassis 11-6
Set the Module Switches . . . . . . . . . . . . . . . . . . . 11-7
Configure 1st DHRIO Module . . . . . . . . . . . . . . 11-7
Configure 1st FLEX Adapter . . . . . . . . . . . . . . . 11-8
Configure 2nd DHRIO Module . . . . . . . . . . . . . 11-10
Configure 2nd FLEX Adapter . . . . . . . . . . . . . . 11-11
Scanning 1771 Remote I/O Adapters Through
a 1756-DHRIO in a Remote Chassis . . . . . . . . . . . 11-12
Set the Module Switches . . . . . . . . . . . . . . . . . . 11-13
Configure 1st CNB Module . . . . . . . . . . . . . . . 11-14
Configure 2nd CNB Module . . . . . . . . . . . . . . . 11-15
Configure DHRIO Module . . . . . . . . . . . . . . . . 11-16
Configure 1771-ASB Adapter . . . . . . . . . . . . . . 11-17
Run RSNetworx . . . . . . . . . . . . . . . . . . . . . . . . 11-18
Chapter Summary and What’s Next . . . . . . . . . . . . . 11-18
Block Transfers Chapter 12
Block Transfers to Remote FLEX I/O Modules
Through a 1756-DHRIO in a Local Chassis . . . . . . 12-2
Set the Module Switches . . . . . . . . . . . . . . . . . . . 12-3
Configure DHRIO Module . . . . . . . . . . . . . . . . . 12-3
Configure the FLEX Adapter . . . . . . . . . . . . . . . 12-4
Configure Block Transfer Module . . . . . . . . . . . 12-6
Configure Message Instruction. . . . . . . . . . . . . . . 12-7
Block Transfers to Remote 1771-ASB I/O Modules
Through a 1756-DHRIO in a Remote Chassis . . . . . 12-8
Set the Module Switches . . . . . . . . . . . . . . . . . . . 12-9
Configure 1st CNB Module . . . . . . . . . . . . . . . 12-10
Configure 2nd CNB Module . . . . . . . . . . . . . . . 12-11
Configure DHRIO Module . . . . . . . . . . . . . . . . 12-12
Configure 1771-ASB Adapter . . . . . . . . . . . . . . 12-13
Configure 1771-BT Module . . . . . . . . . . . . . . . 12-14

toc–vi Table of Contents
Publication 1756-6.5.14 - August 1998
Chapter Summary and What’s Next . . . . . . . . . . . . . 12-15
Troubleshooting Chapter 13
Checking Power Supply and Module Status . . . . . . . . 13-1
Troubleshooting the Power Supply . . . . . . . . . . . . . . . 13-2
Troubleshooting the Module . . . . . . . . . . . . . . . . . . . . 13-2
Monitoring DH+ Communication Channels . . . . . . . . 13-5
Chapter Summary and What’s Next . . . . . . . . . . . . . . 13-6
PCCC Commands Supported by
the Data Highway Plus Module Appendix A
Specifications Appendix B

Publication 1756-6.5.14 - August 1998
Chapter 1
ControlLogix Data Highway Plus/Remote
I/O Communication Interface Module
What This Chapter Contains This chapter describes the module and what you must know and do
before you begin to use it. The following table describes what this
chapter contains and its location.
What the Module Does The Data Highway Plus/RIO module supports the following types
of communication:
• DH+ Messaging
• Control and Information Protocol (CIP) Messaging
• Remote I/O
You can send messages between devices on Data Highway Plus
networks and devices on other networks such as ControlNet,
Ethernet, or other DH+.
Using the RIO functionality, a 1756-DHRIO channel in scanner mode
transfers discrete and block-transfer data with remote I/O devices.
This module allows connection to multiple remote I/O adapters.
Routing Limitations The 1756-DHRIO module has the capability of routing a message
through up to four communications networks and three chassis. This
is only a limitation on the routing of a message and not on the total
number of networks or chassis in a system.
For information about: See page:
What the Module Does 1-1
Routing Limitations 1-1
Module Features 1-4
Compliance to European Union Directives 1-6
Preventing Electrostatic Discharge 1-7
Removal and Insertion Under Power 1-8
Chapter Summary and What’s Next 1-8

Publication 1756-6.5.14 - August 1998
1-2 ControlLogix Data Highway Plus/Remote I/O Communication Interface Module
DH+ and CIP Messaging
The 1756-DHRIO module allows an information exchange between
devices, such as PLCs, Logix5550 processors in ControlLogix
chassis, and SLCs.
With the 1756-DHRIO module, you may exchange information in
any of the following scenarios:
• between PLCs/SLCs on different networks
• between the Logix5550 and a PLC/SLC
• between Logix5550s
The following illustration shows an example system. Two
ControlLogix Gateways link existing Data Highway Plus networks.
Communication between PLC-5 programmable controllers on
different networks is accomplished in the same manner used for
communication within a network.
41275
Data Collection and
Recipe Management Programming Terminal
ControlLogix
Chassis
ControlLogix
Chassis
Data Highway Plus
PLC-5
Data Highway Plus
SLC 500 RSView PLC-5 SLC 500 RSView

Publication 1756-6.5.14 - August 1998
ControlLogix Data Highway Plus/Remote I/O Communication Interface Module 1-3
Remote I/O
When a channel on the module is configured for Remote I/O, the
module will act as a scanner for the RIO network. The Logix5550
controller (1756-L1) communicates to the module’s RIO scanner to
send and receive the I/O on the RIO network.
The following illustration shows an example system.
41276
ControlLogix
chassis
DHRIO moduleLogix5550
1771-ASB
1746-ASB
PLC-5/20 in Adapter mode
1794-FLEX I/O
Remote I/O

Publication 1756-6.5.14 - August 1998
1-4 ControlLogix Data Highway Plus/Remote I/O Communication Interface Module
Module Features Use the following illustration to identify the external features of the
Data Highway Plus/RIO module.
Other module features are:
• uses routing table that allows DH+ only devices to use the
1756-DHRIO module and ControlLogix chassis to access
other networks
• supports routing communications to and from other
modules
• has no limit on number of modules per chassis, up to the
number of available slots and the capabilities of the
power supply
• can be removed and inserted under power without
disrupting power to other modules in the chassis
41278
Network Type switches
(behind cover)
41277
Network Address switches
(behind cover)
Backplane
connector
(CIP=Port 1)
Side
view Front view
Alphanumeric
status indicator
Channel and
module status
indicators
8-pin mini-DIN
Programming
Terminal
Channel A
(CIP=Port 2)
Wiring
label
Door
Switch 1 Switch 6
Channel A
Network Type Channel B Network Type
031
5
4
2
6
7
Switch 2
(10s)
Channel A Address
Shown in Position 10
Switch 3
(1s) Channel B Address
Shown in Position 24
Channel
A
Channel
B
Specify Network Type Set Switch
0
1
2-7
0
1
2-7
DH+
RIO Scanner
Illegal
DH+
RIO Scanner
Illegal
031
5
4
2
6
7
031
5
4
2
6
7
031
5
4
2
6
7031 5
4
2
6
7
031
5
4
2
6
7
Switch 4
(10s) Switch 5 (1s)
Channel B
(CIP=Port 3)

Publication 1756-6.5.14 - August 1998
ControlLogix Data Highway Plus/Remote I/O Communication Interface Module 1-5
Setting Switches
Before installing the module, you must set the network type switches
for DH+ or RIO, depending on your application. For a channel
configured as DH+, you must also select a node address within the
range of 00-77. Node addresses are set and displayed in octal.
Important: If you require a channel to be configured for DH+, use
Channel A. By doing so, you can connect your
programming terminal to the connector on the front of
the module and communicate to devices on the network.
If only one channel is needed for RIO, use Channel B.
Set the network type and node address switches as shown below.
Switch 1 Switch 6
Channel A
Network Type Channel B Network Type
031
5
4
2
6
7
031
5
4
2
6
7
Switch 2
(10s)
Channel A Address
Shown in Position 10
Switch 4
(10s) Switch 5 (1s)
Switch 3
(1s) Channel B Address
Shown in Position 24
Channel
A
Channel
B
Specify Network Type Set Switch
0
1
2-7
0
1
2-7
DH+
RIO Scanner
Illegal
DH+
RIO Scanner
Illegal
Network type
switches
(behind cover)
20810
Nodetypeswitches
(behind cover)
This example shows
channel A set for DH+
and channel B set RIO
031
5
4
2
6
7
031
5
4
2
6
7
031
5
4
2
6
7
031
5
4
2
6
7
031
5
4
2
6
7
031
5
4
2
6
7
031
5
4
2
6
7
031
5
4
2
6
7
031
5
4
2
6
7
031
5
4
2
6
7
This example shows A node address
at 010 and channel B at 024
Specify Network Type Set Switch
Channel
ADH+ 0
RIO Scanner 1
Illegal 2-7
Channel
BDH+ 0
RIO Scanner 1
Illegal 2-7
Important: These node switches
are not used with RIO.

Publication 1756-6.5.14 - August 1998
1-6 ControlLogix Data Highway Plus/Remote I/O Communication Interface Module
Alphanumeric Indicators
At module power-up, the alphanumeric indicator illuminates and
cycles through a sequence of power-up messages.
Included in the sequence is a scrolling display of the series letter, two
digits of the firmware major revision, a dot, and two digits of the
firmware minor revision. For example, the display will scroll B02.14
for a series B module with firmware revision 2.14.
After the power-up sequence, a sequence of information and status
messages are displayed on a continuous cycle. The following table
shows the sequence of messages for a module that has channel A set
for DH+ and channel B set for RIO.
The module’s alphanumeric indicators will stop cycling and display
an error message or error code if it detects an error that is severe. See
chapter 13 for a detailed list of the error messages and the cyclic
status messages that my display across the alphanumeric indicator
and for troubleshooting information.
Compliance to
European Union Directives This product has the CE mark and is approved for installation within
the European Union and EEA regions. It has been designed and tested
to meet the following directives.
EMC Directive
This product is tested to meet Council Directive 89/336/EEC
Electromagnetic Compatibility (EMC) and the following standards,
in whole or in part, documented in a technical construction file:
• EN 50081-2EMC - Generic Emission Standard, Part 2 -
Industrial Environment
• EN 50082-2EMC - Generic Immunity Standard, Part 2 -
Industrial Environment
This product is intended for use in an industrial environment.
Table 1.1
Data Highway Plus/Remote I/O
Sequence of
display: Where:
A DH
A#XX
XXXX
A is the channel (A or B) and DH indicates network type is DH+
XX is the channel’s node address
XXXX is the channel’s status message
B IO
SCAN
XXXX
B is the channel (A or B) and IO is network type
SCAN indicates scanner
XXXX is the channel’s status message

Publication 1756-6.5.14 - August 1998
ControlLogix Data Highway Plus/Remote I/O Communication Interface Module 1-7
Low Voltage Directive
This product is tested to meet Council Directive 73/23/EEC Low
Voltage, by applying the safety requirements of EN 61131-2
Programmable Controllers, Part 2 - Equipment Requirements
and Tests.
For specific information required by EN 61131-2, see the appropriate
sections in this publication, as well as the following Allen-Bradley
publications:
• Industrial Automation Wiring and Grounding Guidelines
For Noise Immunity, publication 1770-4.1
• Guidelines for Handling Lithium Batteries,
publication AG-5.4
• Automation Systems Catalog, publication B111
Preventing Electrostatic Discharge The Data Highway Plus module is sensitive to electrostatic discharge.
!ATTENTION: Electrostatic discharge can damage
integrated circuits or semiconductors if you touch
backplaneconnectorpins. Follow theseguidelineswhen
you handle the module:
• Touch a grounded object to discharge static
potential
• Wear an approved wrist-strap grounding device
• Do not touch the backplane connector or
connector pins
• Do not touch circuit components inside the module
• If available, use a static-safe work station
• When not in use, keep the module in its
static-shield bag

Publication 1756-6.5.14 - August 1998
1-8 ControlLogix Data Highway Plus/Remote I/O Communication Interface Module
Removal and Insertion Under
Power This module is designed to be installed or removed while chassis
power is applied.
Chapter Summary and What’s Next In this chapter you learned about:
• what the module does
• module features
• compliance to European Union Directives
• electrostatic discharge
• removal and insertion under power
Move on to Chapter 2 to learn about Using Data Highway Plus.
!ATTENTION: When you insert or remove a module
whilebackplanepowerison,anelectricalarcmay occur.
An electrical arc can cause personal injury or property
damage by:
• sending an erroneous signal to your system’s
field devices causing unintended machine
motion or loss of process control.
• causing an explosion in a hazardous
environment.
Repeated electrical arcing causes excessive wear to
contacts on both the module and its mating connector.
Worn contacts may create electrical resistance that can
affect module operation.