A-BSLC 500 EtherNet/IP Adapter

Important User Information

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.

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impaired.

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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.

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Overview

This chapter provides an introduction to the features and functionalities of the 

1747-AENTR SLC™ 500 EtherNet/IP Adapter. It includes the following sections.

Module Description The 1747-AENTR Adapter enables CompactLogix™ and ControlLogix® 

processors to control SLC™ I/O modules. It is primarily designed to enable 

migration of existing SLC controlled systems to Logix-based systems.

The adapter mainly acts as a gateway between the SLC backplane and 

EtherNet/IP and typically replaces an SLC controller in the 1746 rack. On 

remote SLC racks, it replaces the 1747-ASB module or the ControlNet® adapters 

1747-ACN15 and 1747-ACNR15.

Control of the backplane I/O is accomplished with a CompactLogix or 

ControlLogix controller communicating through an EtherNet/IP router in the 

Logix backplane, across EtherNet/IP, and into the 1747-AENTR gateway. 

As a gateway between the SLC backplane and EtherNet/IP, the 1747-AENTR 

module is a CIP™ server (for both Explicit Messaging and I/O) on the Ethernet 

port, and an SLC host on the 1746 backplane. 

Connections can be made to support 1746 and 1747 analog, digital, and 

specialty I/O modules installed in the backplane.

For the complete list of supported I/O modules, see the table, List of I/O 

Modules Supported by the 1747-AENTR Adapter on page 27.

Topic Page

Module Description 9

Hardware Components 10

The 1747-AENTR in a Logix System 11

Hardware/Software Compatibility 11

Diagnostic Indicators 11

What the Adapter Does 11

Use of the Common Industrial Protocol (CIP) 12

Understand the Producer/Consumer Model 12

Support of Direct Connections 12

IMPORTANT Studio 5000 Logix Designer® application (previously RSLogix 5000®) 

revision 21 and later, and firmware revision 2.001 and later supports:

• multiple chassis, with a maximum number of three chassis;

• a maximum of 30 SLC I/O modules;

• a maximum of 96 Class 1 connections;

• up to 8 Class 3 connections.

The 1747-AENTR in a 

Logix System

In this example, the I/O modules communicate with the controller through the 

1747-AENTR adapter. The controller can produce and consume tags to the I/O. 

Configuration of devices and the network is done through the personal 

computer running the controller and configuration software

Hardware/Software

Compatibility

The adapter and the applications described in this manual is compatible with 

the following firmware revisions and software releases

roduct Firmware Revision/

Software Versions

1747-AENTR 1.001 or later

Logix controller v20 or later

RSLogix 5000 or Logix Designer v20 or later

RSLinx® software v2.59 or later

Diagnostic Indicators The module has the following diagnostic indicators:

• Link 1 and Link 2 status indicator

• Module indicator

• 4-character status display

What the Adapter Does The 1747-AENTR EtherNet/IP adapter performs the following primary tasks:

• Control of real-time I/O data (also known as implicit messaging) – the 

adapter serves as a bridge between I/O modules and the network 

• Support of messaging data for configuration and programming 

information (also known as explicit messaging)

Use of the Common 

Industrial Protocol (CIP)

The adapter uses the Common Industrial Protocol (CIP), the application layer 

protocol specified for EtherNet/IP, the Ethernet Industrial Protocol. It is a 

message-based protocol that implements a relative path to send a message 

from the producing device in a system to the consuming devices.