Allen-Bradley 20-COMM-M Modbus/TCP Adapter User manual

20-COMM-M Modbus/TCP Adapter
Firmware 1.xxx
User Manual

20-COMM-M Modbus/TCP Adapter User Manual
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
available from your local Rockwell Automation sales office or online at http://
www.rockwellautomation.com/literature) describes some important differences
between solid state equipment and hard-wired electromechanical devices.
Because of this difference, and also because of the wide variety of uses 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 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.
Important: Identifies information that is critical for successful application and
understanding of the product.
PowerFlex, DriveExplorer, DriveExecutive, DPI, DriveTools SP, and ControlFLASH, are either trademarks or registered trademarks of
Rockwell Automation, Inc.
EtherNet/IP is a trademark of ODVA and COntrolNet International, Ltd.
Ethernet is a trademark of Digital Equipment Corporation, Intel Corporation, and Xerox Corporation.
Windows and Microsoft are registered trademarks of Microsoft Corporation.
!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 consequences.
Shock Hazard labels may be located on or inside the equipment
(e.g., drive or motor) to alert people that dangerous voltage may be
present.
Burn Hazard labels may be located on or inside the equipment
(e.g., drive or motor) to alert people that surfaces may be at
dangerous temperatures.

20-COMM-M Modbus/TCP Adapter User Manual
Publication 20COMM-UM014C-EN-P
Summary of Changes
The information below summarizes the changes made to this manual since
its last release (March 2010):
Description of Changes Page
In the subsection “Direct Access Method,” added a TIP to determine the starting
register for a 0-based Modbus/TCP master device, and the registers to read for the
example provided.
4-9

soc-ii Summary of Changes
20-COMM-M Modbus/TCP Adapter User Manual
Publication 20COMM-UM014C-EN-P

20-COMM-M Modbus/TCP Adapter User Manual
Publication 20COMM-UM014C-EN-P
Table of Contents
Preface About This Manual
Related Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P-1
Rockwell Automation Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P-2
Conventions Used in This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P-2
Chapter 1 Getting Started
Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Compatible Products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Required Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Safety Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Quick Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Status Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Chapter 2 Installing the Adapter
Preparing for an Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Setting the Web Pages Switch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Connecting the Adapter to the Drive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Connecting the Adapter to the Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
Applying Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
Commissioning the Adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Chapter 3 Configuring the Adapter
Configuration Tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Using the PowerFlex 7-Class HIM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Using BOOTP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Setting the IP Address, Subnet Mask, and Gateway Address. . . . . . . . . . . . . . . . . . . . . . 3-6
Setting the Data Rate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8
Setting the I/O Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8
Setting a Communication Fault Action. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
Setting the Message I/O Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
Setting Web Access Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11
Resetting the Adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12
Viewing the Adapter Status Using Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12
Flash Updating the Adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13
Chapter 4 Using Modbus/TCP Function Codes
Understanding Modbus/TCP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Using the I/O. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
Accessing Device Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9
Using Datalinks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12
Supported Modbus Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15

ii Table of Contents
20-COMM-M Modbus/TCP Adapter User Manual
Publication 20COMM-UM014C-EN-P
Chapter 5 Troubleshooting
Understanding the Status Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
PORT Status Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
MOD Status Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
NET A Status Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
NET B Status Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
Viewing Adapter Diagnostic Items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
Viewing and Clearing Events. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6
Chapter 6 Viewing the Adapter’s Web Pages
Accessing the Adapter’s Web Home Page. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Process Display Pop-up Window. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4
TCP/IP Configuration Web Page. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5
Configure E-mail Notification Web Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6
DPI Device Information Pages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-9
Chapter 7 Installing the Adapter in a DPI External Comms Kit (20-XCOMM-DC-BASE)
Appendix A Specifications
Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Mechanical. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Environmental . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2
Regulatory Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2
Appendix B Adapter Parameters
About Parameter Numbers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
Parameter List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
Appendix C Logic Command/Status Words
PowerFlex 7-Class Drives (except PowerFlex 700S) . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-1
PowerFlex 700S Drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-3
Glossary
Index

20-COMM-M Modbus/TCP Adapter User Manual
Publication 20COMM-UM014C-EN-P
Preface
About This Manual
Related Documentation
Documentation can be obtained online at http://
literature.rockwellautomation.com. To order paper copies of technical
documentation, contact your local Rockwell Automation distributor or sales
representative.
To find your local Rockwell Automation distributor or sales representative,
visit www.rockwellautomation.com/locations.
For information such as firmware updates or answers to drive-related
questions, go to the Drives Service & Support web site at www.ab.com/
support/abdrives and click on the “Downloads” or “Knowledgebase” link.
Topic Page
Related Documentation P-1
Rockwell Automation Support P-2
Conventions Used in This Manual P-2
For: Refer to: Publication
EtherNet/IP EtherNet/IP Media Planning and Installation Manual (1)
EtherNet/IP Network Infrastructure Guidelines (1)
EtherNet/IP Performance and Application Guide
ODVA Pub. 148
ODVA Pub. 35
ENET-AP001
DriveExplorer™ http://www.ab.com/drives/driveexplorer, and DriveExplorer online help (2) —
DriveTools™ SP (includes DriveExecutive™) http://www.ab.com/drives/drivetools, and DriveExecutive online help (2) —
PowerFlex 7-Class HIM HIM Quick Reference 20HIM-QR001
PowerFlex®70/70EC Drive PowerFlex 70 User Manual
PowerFlex 70/700 Reference Manual
PowerFlex 70EC/700VC Reference Manual
20A-UM001
PFLEX-RM001
PFLEX-RM004
PowerFlex®700/700VC Series A Drive
PowerFlex®700VC Series B Drive
PowerFlex 700 Series A User Manual
PowerFlex 700 Series B User Manual
PowerFlex 70/700 Reference Manual
PowerFlex 70EC/700VC Reference Manual
20B-UM001
20B-UM002
PFLEX-RM001
PFLEX-RM004
PowerFlex®700H Drive PowerFlex 700H Installation Instructions
PowerFlex 700H Programming Manual
PFLEX-IN006
20C-PM001
PowerFlex®700S Drive
(Frames 1 through 6)
PowerFlex 700S with Phase I Control User Manual
PowerFlex 700S with Phase I Control Reference Manual
PowerFlex 700S with Phase II Control Installation Instructions
PowerFlex 700S with Phase II Control User Manual
PowerFlex 700S with Phase II Control Reference Manual
20D-UM001
PFLEX-RM002
20D-IN024
20D-UM006
PFLEX-RM003
PowerFlex®700S Drive
(Frames 9 and higher)
PowerFlex 700S with Phase I Control User Manual
PowerFlex 700S with Phase I Control Reference Manual
PowerFlex 700S with Phase II Control Installation Instructions
PowerFlex 700S with Phase II Control User Manual
PowerFlex 700S with Phase II Control Reference Manual
20D-UM001
PFLEX-RM002
PFLEX-IN006
20D-UM006
PFLEX-RM003
PowerFlex®700L Drive PowerFlex 700L User Manual 20L-UM001
PowerFlex®Digital DC Drive PowerFlex Digital DC Drive User Manual 20P-UM001
Modbus RTU Protocol Specification www.modicon.com/techpubs/TechPubNew PI_MBUS_300.pdf
(1) Use this link to the ODVA EtherNet/IP library for these publications: http://odva.org/Home/ODVATECHNOLOGIES/EtherNetIP/EtherNetIPLibrary/tabid/76/
Default.aspx
(2) The online help is installed with the software.

P-2 About This Manual
20-COMM-M Modbus/TCP Adapter User Manual
Publication 20COMM-UM014C-EN-P
Rockwell Automation
Support
Rockwell Automation, Inc. offers support services worldwide, with over 75
sales/support offices, over 500 authorized distributors, and over 250
authorized systems integrators located through the United States alone. In
addition, Rockwell Automation, Inc. representatives are in every major
country in the world.
Local Product Support
Contact your local Rockwell Automation, Inc. representative for:
•Sales and order support
•Product technical training
•Warranty support
•Support service agreements
Technical Product Assistance
For technical assistance, please review the information in Chapter 5,
Troubleshooting, first. If you still have problems, then access the
Allen-Bradley Technical Support web site at www.ab.com/support/abdrives
or contact Rockwell Automation, Inc.
Conventions Used in This
Manual
This manual provides information about the adapter and using it with
PowerFlex 7-Class (Architecture-Class) drives. The adapter can be used
with other products that support a DPI™ adapter, such as the DPI External
Comms Kit (20-XCOMM-DC-BASE). Refer to the documentation for your
product for specific information about how it works with the adapter.
The following conventions are used throughout this manual:
•Parameter names are shown in the format Parameter xx - [*]. The xx
represents the parameter number. The * represents the parameter name—
for example Parameter 01 - [DPI Port].
•Menu commands are shown in bold type face and follow the format
Menu > Command. For example, if you read “Select File > Open,” you
should click the File menu and then click the Open command.
•The firmware release is displayed as FRN X.xxx. The “FRN” signifies
Firmware Release Number. The “X” is the major release number. The
“xxx” is the minor update number.

20-COMM-M Modbus/TCP Adapter User Manual
Publication 20COMM-UM014C-EN-P
Chapter 1
Getting Started
The adapter is intended for installation into a PowerFlex 7-Class drive and
is used for network communication. The adapter can also be installed in an
External DPI Comms Kit (20-XCOMM-DC-BASE).
Components Figure 1.1 Components of the Adapter
Topic Page
Components 1-1
Features 1-2
Compatible Products 1-2
Required Equipment 1-3
Safety Precautions 1-3
Quick Start 1-5
Status Indicators 1-6
Item Part Description
➊Status Indicators Four LEDs that indicate the status of the DPI, the adapter, and
network connection. Refer to Chapter 5, Troubleshooting.
➋DPI Connector A 20-pin, single-row shrouded male header. An Internal Interface
cable is connected to this connector and a connector on the drive.
➌Ethernet Connector An RJ-45 connector for the Ethernet cable. The connector is CAT-5
compliant to ensure reliable data transfer on 100Base-TX Ethernet
connections.
➍Web Pages Switch
(SW2)
Enables or disables the adapter web pages. Refer to Setting the
Web Pages Switch on page 2-2. SW1 is unused.
➊
➋
➌➍

1-2 Getting Started
20-COMM-M Modbus/TCP Adapter User Manual
Publication 20COMM-UM014C-EN-P
Features The features of the adapter include:
•Typical mounting in a PowerFlex 7-Class drive. The adapter can also be
installed in a DPI External Comms Kit. See Chapter 7, Installing the
Adapter in a DPI External Comms Kit (20-XCOMM-DC-BASE) for
more information.
Important:Due to inherent operating limitations, the adapter cannot be
used with the kit’s optional I/O board.
•Captive screws to secure and ground the adapter to the drive or, when
mounted in a DPI External Comms Kit, to the kit’s metal enclosure.
•Compatibility with various configuration tools to configure the adapter
and connected drive. The tools include the PowerFlex 7-Class HIM on
the drive, and drive-configuration software such as DriveExplorer
(version 2.01 or higher) or DriveExecutive (version 3.01 or higher). In
addition, you can use a BOOTP server to configure the network address
for the adapter.
•Status indicators that report the status of the drive communications, the
adapter, and network. They are visible when the drive cover is open or
closed.
•Parameter-configurable I/O (Logic Command/Reference and up to four
pairs of Datalinks) to meet application requirements.
•Uses Ethernet II framing for Modbus/TCP protocol.
•Support for a variety of Modbus/TCP function codes.
•User-defined fault actions to determine how the adapter and connected
drive respond to I/O messaging communication disruptions.
•Web pages, viewed using a web browser, that show information about the
adapter, connected drive, and other DPI devices connected to the drive.
•Configurable e-mail messaging to desired addresses when selected drive
faults occur and/or are cleared, and/or when the adapter takes a
communication fault action.
•Access to any PowerFlex drive and its connected peripherals on the
network to which the adapter is connected.
Compatible Products DPI is a second generation peripheral communication interface and a
functional enhancement to SCANport. The adapter is compatible with
Allen-Bradley PowerFlex 7-Class drives and other products that support
DPI. At the time of publication, compatible products include:
•PowerFlex 70/70EC drives •PowerFlex 700L drives
•PowerFlex 700/700VC drives •PowerFlex Digital DC drives
•PowerFlex 700H drives •DPI External Comms Kit
•PowerFlex 700S drives •SMC™ Flex

Getting Started 1-3
20-COMM-M Modbus/TCP Adapter User Manual
Publication 20COMM-UM014C-EN-P
Required Equipment Equipment Shipped with the Adapter
When you unpack the adapter, verify that the package includes:
User-Supplied Equipment
To install and configure the adapter, you must supply:
Safety Precautions Please read the following safety precautions carefully.
❑One adapter
❑A 2.54 cm (1 in.) and a 15.24 cm (6 in.) Internal Interface cable (only
one cable is needed to connect the adapter to the drive; for which cable
to use, see Figure 2.2 on page 2-4)
❑One PowerFlex 7-Class DPI (Drive Peripheral Interface) Network
Communication Adapter Installation Instructions (publication
20COMM-IN004)
❑A small flathead screwdriver
❑Ethernet cable – refer to the EtherNet/IP Media Planning and
Installation Manual (publication ENET-IN001)
❑Configuration tool, such as:
– PowerFlex 7-Class HIM (20-HIM-xx)
– DriveExplorer (version 2.01 or higher)
– DriveExecutive stand-alone software (version 3.01 or higher) or
bundled with the DriveTools SP suite (version 1.01 or higher)
– BOOTP Server (version 2.1 or higher; for network setup only)
❑Third-party network configuration software tool
❑A PC connection to the Modbus/TCP network
!
ATTENTION: Risk of injury or death exists. The PowerFlex
drive may contain high voltages that can cause injury or death.
Remove all power from the PowerFlex drive, and then verify
power has been discharged before installing or removing an
adapter.
!
ATTENTION: Risk of injury or equipment damage exists. Only
personnel familiar with drive and power products and the
associated machinery should plan or implement the installation,
start up, configuration, and subsequent maintenance of the
product using an adapter. Failure to comply may result in injury
and/or equipment damage.
!
ATTENTION: Risk of equipment damage exists. The adapter
contains ESD (Electrostatic Discharge) sensitive parts that can be
damaged if you do not follow ESD control procedures. Static
control precautions are required when handling the adapter. If
you are unfamiliar with static control procedures, refer to
Guarding Against Electrostatic Damage (publication
8000-4.5.2).

1-4 Getting Started
20-COMM-M Modbus/TCP Adapter User Manual
Publication 20COMM-UM014C-EN-P
!
ATTENTION: Risk of injury or equipment damage exists. If
the adapter is transmitting control I/O to the drive, the drive may
fault when you reset the adapter. Determine how your drive will
respond before resetting an adapter.
!
ATTENTION: Risk of injury or equipment damage exists.
Parameter 23 - [Comm Flt Action] lets you determine the
action of the adapter and connected drive if communications are
disrupted. By default, this parameter faults the drive. You can set
this parameter so that the drive continues to run. Precautions
should be taken to ensure that the setting of this parameter does
not create a risk of injury or equipment damage. When
commissioning the drive, verify that your system responds
correctly to various situations (for example, a disconnected cable
or a faulted controller).
!
ATTENTION: Risk of injury or equipment damage exists.
When a system is configured for the first time, there may be
unintended or incorrect machine motion. Disconnect the motor
from the machine or process during initial system testing.
!
ATTENTION: Risk of injury or equipment damage exists.
Parameter 19 - [Msg I/O Timer] lets you determine how long it
will take the adapter to detect network communication losses. By
default, this parameter sets the timeout to five seconds. You can
set it so that the duration is shorter, longer, or disabled. When set
to disabled, this also disables Parameter 23 - [Comm Flt
Action]. Therefore, a communications fault action will be
ignored. Take precautions to ensure that the setting does not
create a risk of injury or equipment damage. When
commissioning the drive, verify that your system responds
correctly to various situations (for example, a disconnected
cable).
!
ATTENTION: Risk of injury or equipment damage exists. The
examples in this publication are intended solely for purposes of
example. There are many variables and requirements with any
application. Rockwell Automation, Inc. does not assume
responsibility or liability (to include intellectual property
liability) for actual use of the examples shown in this publication.
!
ATTENTION: For security reasons, it is recommended to
isolate the Modbus/TCP control network from the
enterprise-wide Ethernet network. This can be accomplished by:
•Making the Modbus/TCP control network a stand-alone
network.
•Placing a firewall between the Modbus/TCP control network
and the enterprise-wide Ethernet network.

Getting Started 1-5
20-COMM-M Modbus/TCP Adapter User Manual
Publication 20COMM-UM014C-EN-P
Quick Start This section is provided to help experienced users quickly start using the
adapter. If you are unsure how to complete a step, refer to the referenced
chapter.
Step Action Refer to…
1Review the safety precautions for the adapter. Throughout This Manual
2Verify that the PowerFlex drive is properly installed. Drive User Manual
3Install the adapter.
Verify that the PowerFlex drive is not powered. Then, connect the
adapter to the network using an Ethernet cable and to the drive
using the Internal Interface cable. Use the captive screws to
secure and ground the adapter to the drive.
Note: When installing the adapter in a DPI External Comms Kit,
refer to the 20-XCOMM-DC-BASE Installation Instructions
(publication 20COMM-IN001) supplied with the kit.
PowerFlex 7-Class DPI
Network Communication
Adapter Installation
Instructions (publication
20COMM-IN004) and
Chapter 2,
Installing the Adapter
4Apply power to the adapter.
A. The adapter receives power from the drive. Verify that the
adapter is installed correctly and then apply power to the drive.
The status indicators should be green. If they flash red, there is
a problem. Refer to Chapter 5, Troubleshooting.
B. Configure/verify key drive parameters.
Chapter 2,
Installing the Adapter
5Configure the adapter for your application.
Set adapter parameters for the following functions as required by
your application:
•IP address, subnet mask, and gateway address
•Data rate
•I/O configuration
•Fault action
Chapter 3,
Configuring the Adapter
6Set up the master device to communicate with the adapter.
Use a network tool to configure the master device on the Modbus/
TCP network.
Instructions for your
network tool

1-6 Getting Started
20-COMM-M Modbus/TCP Adapter User Manual
Publication 20COMM-UM014C-EN-P
Status Indicators The adapter uses four status indicators to report its operating status. They
can be viewed on the adapter or through the drive cover (Figure 1.2).
Figure 1.2 Status Indicators (location on drive may vary)
After installing the adapter and applying power to the drive, refer to
Start-Up Status Indications on page 2-6 for possible start-up status
indications and their descriptions.
Item Name
➊PORT
➋MOD
➌NET A
➍NET B
➊
➋
➌
➍
➊
➋
➌
➍

20-COMM-M Modbus/TCP Adapter User Manual
Publication 20COMM-UM014C-EN-P
Chapter 2
Installing the Adapter
This chapter provides instructions for installing the adapter in a PowerFlex
7-Class drive. This adapter can also be installed in a DPI External Comms
Kit. In this case, refer to the 20-XCOMM-DC-BASE Installation
Instructions (publication 20COMM-IN001) supplied with the kit.
Preparing for an Installation Before installing the adapter:
•Read the EtherNet/IP Performance and Application Guide (publication
ENET-AP001) and EtherNet/IP Media Planning and Installation
Manual (publication ENET-IN001).
•Verify that you have all required equipment. Refer to Required
Equipment on page 1-3.
Topic Page
Preparing for an Installation 2-1
Setting the Web Pages Switch 2-2
Connecting the Adapter to the Drive 2-3
Connecting the Adapter to the Network 2-6
Applying Power 2-6
Commissioning the Adapter 2-8
!
ATTENTION: Risk of equipment damage exists. The adapter
contains ESD (Electrostatic Discharge) sensitive parts that can be
damaged if you do not follow ESD control procedures. Static
control precautions are required when handling the adapter. If you
are unfamiliar with static control procedures, refer to Guarding
Against Electrostatic Damage (publication 8000-4.5.2).

2-2 Installing the Adapter
20-COMM-M Modbus/TCP Adapter User Manual
Publication 20COMM-UM014C-EN-P
Setting the Web Pages
Switch
To use the adapter web pages, the Web Pages Switch must be set to its
“Enable Web” position.
Important:A new switch setting is recognized only when power is applied
to the adapter, or the adapter is reset. If you change a switch
setting, cycle power or reset the adapter to apply the change.
Set the Web Pages Switch SW2 (Figure 2.1) to enable or disable the adapter
web pages. By default, the adapter web pages are disabled. For complete
details on adapter web pages, see Viewing the Adapter’s Web Pages on
page 6-1.
Figure 2.1 Setting Web Pages Switch
SW2 Setting Description
Down (OFF) position Disables the adapter web pages (default setting)
Up (ON) position Enables the adapter web pages
2
1
O
N
UNUSED
SWITCH
WEB PAGES
SWITCH
Enable Web
Position
Disable Web
Position

Installing the Adapter 2-3
20-COMM-M Modbus/TCP Adapter User Manual
Publication 20COMM-UM014C-EN-P
Connecting the Adapter to
the Drive
1. Remove power from the drive.
2. Use static control precautions.
3. Remove the drive cover or open the drive door.
4. Connect the Internal Interface cable to the DPI port on the drive and
then to the DPI connector on the adapter (see Figure 2.2).
5. Secure and ground the adapter to the drive (see Figure 2.3) by doing the
following:
–On a PowerFlex 70 drive, fold the Internal Interface cable behind the
adapter and mount the adapter on the drive using the four captive
screws.
–On a PowerFlex 700, PowerFlex 700H or PowerFlex 700S drive,
mount the adapter on the drive using the four captive screws.
Important:Tighten all screws to properly ground the adapter.
Recommended torque is 0.9 N•m (8.0 lb•in).
!
ATTENTION: Risk of injury or death exists. The PowerFlex
drive may contain high voltages that can cause injury or death.
Remove power from the drive, and then verify power has been
discharged before installing or removing the adapter.

2-4 Installing the Adapter
20-COMM-M Modbus/TCP Adapter User Manual
Publication 20COMM-UM014C-EN-P
Figure 2.2 DPI Ports and Internal Interface Cables
➋
➌
➍
➊
X1
X2
➍
20-COMM-M Adapter
PowerFlex 700 Frames 0 and 1
PowerFlex 700S Frames 0 and 1
PowerFlex 70 - All Frames
PowerFlex 700 Frames 2 and Larger
PowerFlex 700S Frames 2 through 6
HIM panel opens to
allow access to DPI
interface. To open
panel, remove screws
on left side of HIM
panel and swing open.
PowerFlex 700H Frames 9 and Larger
PowerFlex 700S Frames 9 and Larger
Item Description
➊15.24 cm (6 in.) Internal Interface cable
➋DPI Connector
➌Ethernet cable
➍2.54 cm (1 in.) Internal Interface cable

Installing the Adapter 2-5
20-COMM-M Modbus/TCP Adapter User Manual
Publication 20COMM-UM014C-EN-P
Figure 2.3 Mounting and Grounding the Adapter
X1
X2
Drive
Adapter
Internal Interface Cable
folded behind the adapter
and in front of the drive.
PowerFlex 70 - All Frame Sizes
(Adapter mounts in drive.)
Verify metal ground tab is bent 90° and
is under the adapter before tightening
screw. After tightening the screw, verify
continuity exists between the head of
the screw and drive ground.
Ground Tab Detail
PowerFlex 700 Frames 0 and 1
PowerFlex 700S Frames 0 and 1
(Adapter mounts on door.)
0.9 N•m
(8.0 lb•in)
4 Places
PowerFlex 700 Frames 2 and Larger
PowerFlex 700S Frames 2 through 6
(Adapter mounts in drive.)
0.9 N•m
(8.0 lb•in)
4 Places
Verify metal ground tab is bent 90° and
is under the adapter before tightening
screw. After tightening the screw, verify
continuity exists between the head of
the screw and drive ground.
0.9 N•m
(8.0 lb•in)
4 Places
PowerFlex 700H Frames 9 and Larger
PowerFlex 700S Frames 9 and Larger
(Adapter mounts behind HIM panel.)
Ground Tab Detail

2-6 Installing the Adapter
20-COMM-M Modbus/TCP Adapter User Manual
Publication 20COMM-UM014C-EN-P
Connecting the Adapter to
the Network
1. Remove power from the drive.
2. Use static control precautions.
3. Connect one end of an Ethernet cable to the network. See Figure 2.4 for
an example of wiring to a Modbus/TCP network.
Figure 2.4 Connecting the Ethernet Cable to the Network
4. Route the other end of the Ethernet cable through the bottom of the
PowerFlex drive (Figure 2.3) and insert its Ethernet cable plug into the
mating adapter receptacle.
Applying Power
Install the drive cover or close the drive door, and apply power to the drive.
The adapter receives its power from the connected drive. When you apply
power to the adapter for the first time, its topmost “PORT” status indicator
should be steady green or flashing green after an initialization. If it is red,
there is a problem. Refer to Chapter 5, Troubleshooting.
Start-Up Status Indications
After power has been applied, the status indicators for the drive and
communications adapter can be viewed on the front of the drive
(Figure 2.5). Possible start-up status indications are shown in Table 2.A.
!
ATTENTION: Risk of injury or death exists. The PowerFlex
drive may contain high voltages that can cause injury or death.
Remove power from the drive, and then verify power has been
discharged before installing or removing the adapter.
Router
(optional)
Switch
Modbus/TCP
Controller
PowerFlex 7-Class Drives
(each with a 20-COMM-M Adapter)
Modbus/TCP
!
ATTENTION: Risk of equipment damage, injury, or death
exists. Unpredictable operation may occur if you fail to verify
that parameter settings are compatible with your application.
Verify that settings are compatible with your application before
applying power to the drive.