User Manual
EtherNet/IP and ControlNet to PROFIBUS PA Linking Devices
Catalog Numbers 1788-EN2PAR, 1788-CN2PAR
Important User Information
IMPORTANT
Read this document and the documents listed in the additional resources section about installation, configuration, and
operation of this equipment before you install, configure, operate, or maintain this product. Users are required to
familiarize themselves with installation and wiring instructions in addition to requirements of all applicable codes, laws,
and standards.
Activities including installation, adjustments, putting into service, use, assembly, disassembly, and maintenance are required
to be carried out by suitably trained personnel in accordance with applicable code of practice.
If this equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be
impaired.
In no event will Rockwell Automation, Inc. 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 associated with any particular installation, Rockwell Automation, Inc. cannot assume responsibility or
liability for actual use based on the examples and diagrams.
No patent liability is assumed by Rockwell Automation, Inc. with respect to use of information, circuits, equipment, or
software described in this manual.
Reproduction of the contents of this manual, in whole or in part, without written permission of Rockwell Automation,
Inc., is prohibited.
Throughout this manual, when necessary, we use notes to make you aware of safety considerations.
WARNING: Identifies information about practices or circumstances that can cause an explosion in a hazardous environment,
which may lead to personal injury or death, property damage, or economic loss.
ATTENTION: Identifies information about practices or circumstances that can lead to personal injury or death, property
damage, or economic loss. Attentions help you identify a hazard, avoid a hazard, and recognize the consequence.
Identifies information that is critical for successful application and understanding of the product.
Labels may also be on or inside the equipment to provide specific precautions.
SHOCK HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that dangerous
voltage may be present.
BURN HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that surfaces may
reach dangerous temperatures.
ARC FLASH HAZARD: Labels may be on or inside the equipment, for example, a motor control center, to alert people to
potential Arc Flash. Arc Flash will cause severe injury or death. Wear proper Personal Protective Equipment (PPE). Follow ALL
Regulatory requirements for safe work practices and for Personal Protective Equipment (PPE).
Allen-Bradley, Rockwell Automation, ControlLogix, FactoryTalk, Studio 5000, Logix Desig ner, and RSNetWorx are trademarks of Rockwell Automation, Inc.
Trademarks not belonging to Rockwell Automation are property of their respective companies
Preface
Installation
Table of Contents
Important User Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
About the Linking Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Network Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1788-EN2PAR Linking Device and EtherNet/IP Network . . . . . . . . 8
1788-CN2PAR Linking Device and ControlNet Network . . . . . . . . 9
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
General Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Prevent Electrostatic Discharge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Environment and Enclosure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
European Hazardous Location Approval . . . . . . . . . . . . . . . . . . . . . . . 12
North American Hazardous Location Approval . . . . . . . . . . . . . . . . 13
Additional Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Chapter 1
Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Power Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
PA Network Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
ControlNet and EtherNet/IP Connections. . . . . . . . . . . . . . . . . . . . . 18
Shielding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
PROFIBUS PA Physical Network Design Guidelines . . . . . . . . . . . . . . . 19
Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Grounding/Earthing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Cable Path. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Cable Lengths. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Cable Type and Minimum Requirements . . . . . . . . . . . . . . . . . . . . . . 21
Cable Color Coding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Termination Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Set the Linking Device Network Address. . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Hardware Switches Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Set the ControlNet Node Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Set the EtherNet/IP Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Ethernet Switch Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
ControlNet Switch Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Software Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
AOP Version . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Firmware Revision. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Set Up in the Studio 5000
Logix Designer Application
Chapter 2
Add the 1788-EN2PAR Linking Device to the I/O Tree . . . . . . . . . . . . 27
Add the 1788-CN2PAR Linking Device to the I/O Tree. . . . . . . . . . . . 28
Configure the Linking Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Configure the PA Master . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Configure the Field Devices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Configure PV with Single Format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Rockwell Automation Publication XXXX-X.X.X - Month Year 3
Table of Contents
Logix Assemblies
Diagnostics
Configure PV with Multiple Formats . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Valve Positioner Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
PROFIBUS PA Redundancy Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
MultiMaster Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Redundant PA Code Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Chapter 3
PA Master Input Image . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Field Device Input Image . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Field Device Output Image. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Chapter 4
Linking Device is Offline. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Field Device is Not Detected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Field Device is Not Configured. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Field Device Faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Web Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Device Type Manager. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Linking Device Display Status
PA Topology
Appendix A
Main Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
PA Master Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Field Device Page. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Appendix B
Master Mode 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Master Mode 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Master Mode 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Master Mode 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Master Mode 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Master Mode 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Master Mode 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Master Mode 7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Master Mode 8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Master Mode 9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Master Mode 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Master Mode 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Master Mode 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Master Mode 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Master Mode 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Master Mode 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Master Mode 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
4 Rockwell Automation Publication XXXX-X.X.X - Month Year
Glossary
Index
Table of Contents
Rockwell Automation Publication XXXX-X.X.X - Month Year 5
Table of Contents
6 Rockwell Automation Publication XXXX-X.X.X - Month Year
Preface
Introduction
This user manual describes the installation and operation of the 1788-EN2PAR
and 1788-CN2PAR linking devices.
About the Linking Devices
The 1788-EN2PAR linking device provides a fast and integrated solution for
adding PROFIBUS PA (process automation) field devices to any Logix platform.
This linking device provides a direct link between PROFIBUS PA and
EtherNet/IP networks with no intermediate PROFIBUS DP (decentralized
peripherals) layer required.
The 1788-CN2PAR linking device provides a fast and integrated solution for
adding PROFIBUS PA field devices to any Logix platform. This linking device
provides a direct link between PROFIBUS PA and ControlNet networks with
no intermediate PROFIBUS DP layer required.
In this manual, both modules are referred to as the linking device.
Integration into the Studio 5000® Logix Designer™ environment is seamless when
you use the Add-on Profiles (AOPs) of the linking device. The process variables
of each field device appear in engineering units without any required user logic.
The entire PROFIBUS PA configuration is done within the Studio 5000 Logix
Designer application. Extra process variable (PV) statuses and diagnostic
information is also available.
The linking device supports up to 24 field devices and supplies 500 mA per
trunk.
You can view detailed diagnostics from each field device by using its device type
manager (DTM) directly from the Studio 5000 environment with FDT
ThinFrame. You can view a scope trace of the signal of each field device and
provide extended statistics about packet count (sent, received, class 1, class 2, and
so on).
Rockwell Automation Publication 1788-UM058B-EN-P - September 2014 7
Preface
Network Diagrams
1788-EN2PAR Linking Device and EtherNet/IP Network
This diagram shows an example of how the 1788-EN2PAR linking device can be
used with an EtherNet/IP network.
8 Rockwell Automation Publication 1788-UM058B-EN-P - September 2014
Preface
1788-CN2PAR
Linking Device
1788-FBJB4R
Junction Boxes
1788-CN2PAR
Linking Device
ControlLog ix
Controller
1788-CN2PAR Linking Device and ControlNet Network
The diagram shows an example of how a 1788-CN2PAR linking device can be
used with a ControlNet network.
Features
Rockwell Automation Publication 1788-UM058B-EN-P - September 2014 9
The AOP provides an intuitive graphical interface to configure devices. A
predefined data structure for each field device provides eight input process
variables (PVs) and eight output PVs.
The linking device uses four controller connections. Data for the 24 field devices
is distributed over the four common industrial protocol (CIP) connections.
Connection A has the data for the linking device and four field devices.
Connections B, C, and D have the data for four field devices each. The minimum
requested packet interval (RPI) is 100 ms, and the maximum is 3,000 ms.
The HSProcessUtility is used to manage and register the general status
description (GSD) files. The utility is launched from the AOP in the Studio
5000 Logix Designer application or directly in Microsoft Windows.
Field Device Tool/Device Type Manager (FDT/DTM) technology is supported;
this technology allows access to field device configuration and diagnostics via
FDT Frames such as FactoryTalk® AssetCentre. In addition, the Rockwell
Automation® FDT ThinFrame (read only) can be launched from a FactoryTalk
View or via the AOP providing access to each field devices status and extended
diagnostics.
Preface
IMPORTANT
Built-in power conditioners and protection help to minimize installation space
requirements. The PA segment is divided between two physical ports (A and B)
with individual protection and a supply of 500 mA per port. See PA Network
Connections on page 16.
Basic diagnostics of the linking device and field devices is found in the input
assemblies. Advanced configuration is accomplished only through the AOP.
To help you troubleshoot the linking device, a 128 x 128 pixel display provides
access to device status information. Status information includes network voltages
and currents, internal temperature, and communication quality to each field
device.
A built-in web server provides remote access to network and field device data.
General Precautions
Read and understand all precautions before using the linking device.
Prevent Electrostatic Discharge
ATT EN TI ON : Prevent Electrostatic Discharge
This equipment is sensitive to electrostatic discharge, which can cause internal
damage and affect normal operation. Follow these guidelines when you handle
this equipment
• Touch a grounded object to discharge potential static.
• Wear an approved grounding wriststrap.
• Do not touch connectors or pins on component boards.
• Do not touch circuit components inside the equipment.
• Use a static-safe workstation, if available.
• Store the equipment in appropriate static-safe packaging when not in use.
Do not wire more than one conductor on any single terminal.
10 Rockwell Automation Publication 1788-UM058B-EN-P - September 2014
Environment and Enclosure
ATTENTION: Environment and Enclosure
• This equipment is intended for use in a Pollution Degree 2 industrial
environment, in overvoltage Category II applications (as defined in IEC 60664-
1), at altitudes up to 2000 m (6562 ft) without derating.
• This equipment is not intended for use in residential environments and may
not provide adequate protection to radio communication services in such
environments.
• This equipment is supplied as open-type equipment. It must be mounted
within an enclosure that is suitably designed for those specific environmental
conditions that will be present and appropriately designed to prevent personal
injury resulting from accessibility to live parts. The enclosure must have
suitable flame-retardant properties to prevent or minimize the spread of flame,
complying with a flame spread rating of 5VA or be approved for the application
if nonmetallic. The interior of the enclosure must be accessible only by the use
of a tool. Subsequent sections of this publication may contain additional
information regarding specific enclosure type ratings that are required to
comply with certain product safety certifications.
• In addition to this publication, see the following:
• Industrial Automation Wiring and Grounding Guidelines, publication 1770-4.1,
for additional installation requirements.
• NEMA Standard 250 and IEC 60529, as applicable, for explanations of the
degrees of protection provided by enclosures.
Preface
ATT EN TI ON : Do not place the module in direct sunlight. Prolonged exposure to
direct sunlight could degrade the LCD.
Rockwell Automation Publication 1788-UM058B-EN-P - September 2014 11
Preface
European Hazardous Location Approval
The following applies when the product bears the marking.
This equipment is intended for use in potentially explosive atmospheres as
defined by European Union Directive 94/9/EC and has been found to comply
with the Essential Health and Safety Requirements relating to the design and
construction of Category 3 equipment intended for use in Zone 2 potentially
explosive atmospheres, given in Annex II to this Directive.
Compliance with the Essential Health and Safety Requirements has been assured
by compliance with EN 60079-15 and EN 60079-0.
ATT EN TI ON : This equipment is not resistant to sunlight or other sources of UV
radiation.
WARNING: This equipment shall be mounted in an ATEX-certified enclosure
with a minimum ingress protection rating of at least IP54 ( as defined in
IEC60529) and used in an environment of not more than Pollution Degree 2 (as
defined in IEC 60664-1) when applied in Zone 2 environments. The enclosure
must have a tool-removable cover or door.
WARNING: This equipment shall be used within its specified ratings defined by
Rockwell Automation.
WARNING: Should the unit be installed in an environment where induced
transients could exceed 44V, then external transient/surge arrestors should be
installed.
WARNING: Secure any external connections that mate to this equipment by
using screws, sliding latches, threaded connectors, or other means provided
with this product.
WARNING: Do not disconnect equipment unless power has been removed or
the area is known to be nonhazardous.
WARNING: Devices shall be used in an environment of not more than Pollution
Degree 2.
12 Rockwell Automation Publication 1788-UM058B-EN-P - September 2014
Preface
North American Hazardous Location Approval
The following information applies when operating this equipment in hazardous
locations.
The following information applies when operating this equipment
in hazardous locations:
Products marked "CL I, DIV 2, GP A, B, C, D" are suitable for use in Class I Division
2 Groups A, B, C, D, Hazardous Locations and nonhazardous locations only. Each
product is supplied with markings on the rating nameplate indicating the
hazardous location temperature code. When combining products within a
system, the most adverse temperature code (lowest "T" number) may be used to
help determine the overall temperature code of the system. Combinations of
equipment in your system are subject to investigation by the local Authority
Having Jurisdiction at the time of installation
WARNING: EXPLOSION HAZARD
• Do not disconnect equipment unless power has
been removed or the area is known to be
nonhazardous.
• Do not disconnect connections to this equipment
unless power has been removed or the area is
known to be nonhazardous. Secure any external
connections that mate to this equipment by using
screws, sliding latches, threaded connectors, or
other means provided with this product.
• Substitution of components may impair suitability
for Class I, Division 2.
• If this product contains batteries, they must only be
changed in an area known to be nonhazardous
Informations sur l'utilisation de cet équipement
en environnements dangereux:
Les produits marqués "CL I, DIV 2, GP A, B, C, D" ne conviennent qu'à une
utilisation en environnements de Classe I Division 2 Groupes A, B, C, D dangereux
et non dangereux. Chaque produit est livré avec des marquages sur sa plaque
d'identification qui indiquent le code de température pour les environnements
dangereux. Lorsque plusieurs produits sont combinés dans un système, le code
de température le plus défavorable (code de température le plus faible) peut
être utilisé pour déterminer le code de température global du système. Les
combinaisons d'équipements dans le système sont sujettes à inspection par les
autorités locales qualifiées au moment de l'installation.
AVERTISSEMENT: RISQUE D'EXPLOSION
• Couper le courant ou s'assurer que l'environnement
est classé non dangereux avant de débrancher
l'équipement.
• Couper le courant ou s'assurer que l'environnement
est classé non dangereux avant de débrancher les
connecteurs. Fixer tous les connecteurs externes
reliés à cet équipement à l'aide de vis, loquets
coulissants, connecteurs filetés ou autres moyens
fournis avec ce produit.
• La substitution de composants peut rendre cet
équipement inadapté à une utilisation en
environnement de Classe I, Division 2.
• S'assurer que l'environnement est classé non
dangereux avant de changer les piles.
WARNING: If you connect or disconnect the communications cable with power
applied to this module or any device on the network, an electrical arc can occur.
This could cause an explosion in hazardous location installations. Be sure that
power is removed or the area is nonhazardous before proceeding.
WARNING: Temperature rating of conductors must be
higher than 82 °C (179.6 °F).
WARNING: If you connect or disconnect wiring while the field-side power is on,
an electrical arc can occur. This could cause an explosion in hazardous location
installations. Be sure that power is removed or the area is nonhazardous before
proceeding.
Rockwell Automation Publication 1788-UM058B-EN-P - September 2014 13
Preface
Additional Resources
These documents contain more information about related products from
Rockwell Automation.
Resource Description
FOUNDATION Fieldbus Linking Devices Technical Data, publication 1788-TD001 Provides technical data and specifications for the FOUNDATION Fieldbus linking devices.
FOUNDATION Fieldbus Junction Boxes Installation Instructions, publication 1788-IN006
ControlLogix® Enhanced Redundancy System User Manual, publication 1756-UM535
ControlLogix EtherNet/IP Module Installation Instructions, publication 1756-IN603
EtherNet/IP Network Configuration User Manual, publication ENET-UM001 Describes how you can use EtherNet/IP communication modules with your Logix5000
RSNetWorx™ for ControlNet Getting Results Guide, publication CNET-GR001 Provides information on how to install and navigate the RSNetWorx™ for ControlNet
RSNetWorx for EtherNet/IP Getting Results Guide, publication ENET-GR001
Industrial Automation Wiring and Grounding Guidelines, publication 1770-4.1 Provides general guidelines for installing a Rockwell Automation industrial system.
Product Certifications website, http://www.ab.com Provides declarations of conformity, certificates, and other certification details.
Provides installation instructions and technical information about the FOUNDATION Fieldbus
junction boxes (1788-FBJB4R, 1788-FBJB6)
Provides information about enhanced redundancy systems including design and planning,
installation, configuration, maintenance, and troubleshooting.
Provides hardware installation instructions for the ControlLogix EtherNet/IP module.
controller and communicate with various devices on the Ethernet network.
software. It explains how to use RSNe tWor x for ControlNet software and how to access and
navigate the online help.
Provides information on how to install and navigate the RSNetWorx for EtherNet/IP
software. It explains how to use RSNetWorx for EtherNet/IP software and how to access and
navigate the online help.
You can view or download publications at
http://www.rockwellautomation.com/literature/
. To order paper copies of
technical documentation, contact your local Allen-Bradley® distributor or
Rockwell Automation sales representative.
14 Rockwell Automation Publication 1788-UM058B-EN-P - September 2014
Hardware
80 mm
(3.15 in)
136 mm
(5.35 in)
152 mm
(5.98 in)
Chapter 1
Installation
ATTENTION: Do not wire multiple conductors on any single terminal.
Dimensions
Power Connection
To comply with the CE Low Voltage Directive (LVD), this equipment must be
powered from a source compliant with Safety Extra Low Voltage (SELV) or
Protected Extra Low Voltage (PELV).
To comply with UL restrictions, this equipment must be powered from a source
compliant with Class 2 or Limited Voltage/Current.
Rockwell Automation Publication 1788-UM058B-EN-P - September 2014 15
Chapter 1 Installation
IMPORTANT
We re co mm en d a 24 …32V DC power supply for the linking device to operate
correctly. No additional power supplies or power conditioners are required. The
power supply connection is described here. Tighten DC Power connections to a
torque of 0.22…0.25Nm (2…2.2 lb-in).
Do not use extra power supplies or power conditioners with the 1788-EN2PAR
and 1788-CN2PAR linking devices.
PA Network Connections
The PA ne twork must be conne cted vi a the PA
terminal on the linking device. The PA network
connection and pin-out is described here.
Pin Description
Right/Top (red) PA +
Middle (green) PA -
Left/Bottom Shield
Make PA network connections to a torque of
0.5…0.6 Nm (4.4…5.3 lb-in)
The PA segment is split between two physical ports,
A and B.
16 Rockwell Automation Publication 1788-UM058B-EN-P - September 2014
The PA network connections are described here.
Installation Chapter 1
Rockwell Automation Publication 1788-UM058B-EN-P - September 2014 17
Chapter 1 Installation
EtherNet/IP Port
ControlNet Connections
(1788-CN2PAR)
ControlNet Status
(1788-CN2PAR)
ControlNet and EtherNet/IP Connections
Two BNC (Bayonet Neill-Concelman) connectors on the base of the
1788-CN2PAR linking device provide connections for single or dual
ControlNet media. The dual port EtherNet/IP switch provides connections for
multiple EtherNet/IP topologies, including device level ring (DLR). The
EtherNet/IP port can also be used as a connection point in the field to access the
Web server or asset management tools.
The ControlNet connections are described here.
Shielding
Ground the linking device shield connection to a clean earth connection.
Connect the shield to the PA media so that connectivity runs through all
junction boxes, but is not connected to the field device shield or grounded at the
device.
18 Rockwell Automation Publication 1788-UM058B-EN-P - September 2014
Do not attach the PA media shield to the field device. Tape the media shield back
to avoid accidental contact with other conductors or ground.
Installation Chapter 1
IMPORTANT
IMPORTANT
If the shield is not correctly connected, noise from the environment on the PA
bus can cause the PA data to be corrupted. Corrupted data can result in a low
success rate and device connections being lost. Section 12.8.5 of IEC61158-2
(Physical Layer Specification), indicates that 90% of the full length of the cable
must be shielded.
See Grounding/Earthing on page 19 for more details for shield connections.
PROFIBUS PA Physical Network Design Guidelines
This section provides more guidelines for the design of your PA network.
Power Supply
Verify that the power supply is not over-specified for the application; otherwise,
the Switch mode generates noise when sufficient current is not being drawn.
Ta b l e 1
Table 1 - Current Consumption Example
The minimum allowed input voltage is 24V DC, and the maximum is 32V DC.
You must calculate the correct cable length and distance from the power supply
for your installation. If the cable is too long, it can cause voltage drops in the
supply rail when sufficient current is being drawn. See Cable Lengths
to help you determine the proper cable length for your installation.
shows an example of current consumption for a typical application.
Linking device current consumption at 24V = 260 mA
PA bus current consumption for a specific application at 24V = 150 mA
Total = 410 mA
Do not use a 24V DC, 10 A power supply. We recommend using a 24V DC, 1 A
power supply.
on page 20
Grounding/Earthing
Per section 12.8.7 of IEC61158-2 (Physical Layer Specification), PA signal wires
(PA+ or PA-) must not be connected to ground/earth at any stage of the
network. The shield must be grounded/earthed at only one place.
To ground the shield, connect it to the PROFIBUS PA connector as shown in
Shielding
connector as shown in Power Connection
Rockwell Automation Publication 1788-UM058B-EN-P - September 2014 19
on page 18, and connect ground/earth to the shield of the power
on page 15.
Chapter 1 Installation
DC resistance per conductor: 24 Ω/km
Total cable resistance: 48 Ω
Total current consumption: (4 x 40 mA) + (16 x 15 mA)
= 320 mA
Tot al vo ltage drop : 48 Ω x 320 mA
= 15.36V
Cable Path
Do not route the PROFIBUS PA cable near any motors or high-voltage/
high-current cables. Motors and high-voltage/high-current cables can generate
noise that decreases communication signal quality on the PA cable, which can
corrupt PA packets and cause field device timeouts.
Cable Lengths
Load and voltage drop determine maximum cable length. Consider these factors
when planning the cable length for your installation:
• The more field devices and junction boxes that are connected, the bigger
the load will be. The bigger the load, the more the signal attenuates, which
can cause the signal to become unreadable.
• The bigger the load and the longer the cable, the bigger the voltage drop
across the cable. The voltage at the end of a long cable can drop below the
allowed PROFIBUS PA level. See Figure 1
example.
for a cable length calculation
Figure 1 - Cable Length Calculation Example
20 Rockwell Automation Publication 1788-UM058B-EN-P - September 2014
Installation Chapter 1
Cable Type and Minimum Requirements
Per section 12.8.2 of IEC61158-2 (Physical Layer Specification), the PROFIBUS
PA cable must meet the following minimum requirements:
• Impedance at 31.25 kHz of 100
Ω ± 20%
• Maximum attenuation of 3 dB/km
• Conductor cross-sectional area of 0.8mm
2
(18 AWG)
• Shield coverage of at least 90%
• Maximum DC resistance of 24
Ω/km per conductor
• Maximum capacitive unbalanced to the shield of 4nF/km
Cable Color Coding
Per section 12.8.8 of IEC61158-2 (Physical Layer Specification), the color code
of the PROFIBUS PA cable must match the descriptions in the following table.
Cable Strand Color
PA cable positive (+) Red
PA cable negative (-) Green
Non-IS PA cable Black
IS PA cable Blue or blue/black
Termination Guidelines
Terminate the PA bus cable at the beginning and end of the cable. You can set the
linking device to be internally terminated. If the architecture allows it,
terminators can be placed at different locations. See Appendix B
and their correct termination locations.
Verify that junction boxes are not terminated internally. More than two
terminators will cause the communication signal to become slewed and
attenuated, which causes the signal to become unreadable.
Per section 12.8.6 of IEC61158-2 (Physical Layer Specification), terminator
impedance is equal to a 100
Ω resistor in series with a 1μF capacitor.
for architectures
Rockwell Automation Publication 1788-UM058B-EN-P - September 2014 21
Chapter 1 Installation
Set the Linking Device Network Address
This section describes the network address switches.
Hardware Switches Location
The hardware switches are located under the front cover of the linking device.
Use the Page button to toggle between different diagnostics on the display.
Set the ControlNet Node Address
To set the ControlNet node address of the 1788-CN2PAR linking device, use the
hardware switches behind the front cover.
22 Rockwell Automation Publication 1788-UM058B-EN-P - September 2014
Installation Chapter 1
IMPORTANT
Set the EtherNet/IP Address
The linking device uses an RJ45 connector to connect to an Ethernet network.
The linking device ships with BOOTP enabled. To set the IP address of the
1788-EN2PAR linking device, use a BOOTP server or use the hardware
switches.
Power down the linking device before changing the Ethernet switch settings.
The IP address is set during powerup.
Rockwell Automation Publication 1788-UM058B-EN-P - September 2014 23
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