Allen-Bradley ControlLogix DeviceNet 1756-DNB Foglio di istruzioni

Configuration

Manual

DeviceNet

Communication

Module

(Cat. No. 1756-DNB)

Allen-Bradley

Allen-Bradley Drives

Because of the variety of uses for the products described in this

publication, those responsible for the application and use of this

control equipment must satisfy themselves that all necessary steps

have been taken to assure that each application and use meets all

performance and safety requirements, including any applicable laws,

regulations, codes and standards.

The illustrations, charts, sample programs and layout examples

shown in this guide are intended solely for example. Since there are

many variables and requirements associated with any particular

installation, Allen-Bradley does not assume responsibility or liability

(to include intellectual property liability) for actual use based upon

the examples shown in this publication.

Allen-Bradley publication SGI-1.1, “Safety Guidelines For The

Application, Installation and Maintenance of Solid State Control”

(available from your local Allen-Bradley office) describes some

important differences between solid-state equipment and

electromechanical devices which should be taken into consideration

when applying products such as those described in this publication.

Reproduction of the contents of this copyrighted publication, in

whole or in part, without written permission of Allen-Bradley

Company, Inc., is prohibited.

Throughout this manual we make notes to alert you to possible

injury to people or damage to equipment under specific

circumstances.

!ATTENTION: Identifies information about practices

or circumstances that can lead to personal injury or

death, property damage, or economic loss.

Attention helps 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.

Important: We recommend that you frequently back up your

application programs on an appropriate storage medium

to avoid possible data loss.

PLC-5, DeviceNetManager, FLEX I/O, and RediSTATION are trademarks of Rockwell Automation.

DeviceNet is a trademark of Open DeviceNet Vendor Association (O.D.V.A.).

Windows is a trademark of Microsoft Corp.

Microsoft is a registered trademark of Microsoft Corp.

IBM is a registered trademark of International Business Machines, Incorporated.

All other brand and product names are trademarks or registered trademarks of their respective companies.

Important

Use

Information

Preface

Publication

1756–6.5.15 – July 1998



Use this manual to help you understand how:

•the 1756–DNB communicaton module communicates with the

Logix 5550 processor

•to map I/O data using DeviceNet Manager software

•to configure your 1756-DNB communication module

Use

this chapter before

you begin configuring

your communication

module.

Chapter

Chapter 2 Chapter 3

Appendix A Appendix B

Use

this chapter

to plan your

configuration.

Use this chapter

to configure the

communication

module by using

DeviceNet Manager

software.

Use this appendix

for help with

troubleshooting. Use this appendix

to see a scan list

example.

We assume that you:

•are developing a DeviceNet network using a ControlLogix

chassis in conjunction with a 1756-DNB communication module

•know each of your device’s I/O parameters and requirements

•are proficient with DeviceNet Manager software

•are familiar with the MicrosoftWindowsenvironment

What’

Manual

Audi

Allen-Bradley Drives

P–2

Publication

1756–6.5.15 – July 1998

The following conventions appear throughout this manual to guide

you through the information and concepts.

Important: Your screens may appear slightly different than the ones

depicted in this manual if you are running DeviceNet

Manager software on a platform other than Windows

NT, version 4.0.

This is a definition

box. When a word

is bold within the

text of a paragraph,

a definition box will

appear in the left

margin to further

define the term.

The “MORE” icon is placed beside any paragraph that references

sources of additional information outside of this document.

A definition box defines terms that may be unfamiliar to you.

Screen captures are pictures of the software’s actual screens.

The names of screen buttons and fields are often bolded in the

text of a procedure.

Screen Summary The screen-summary arrow points to a table that summarizes

each button and field of the corresponding screen capture.

The optional-step arrow points to a step that is not required for

scanner configuration. It may be a stand-alone feature or may be

dependent upon a set list of criteria.

Optional Step

1Step numbers appear on the screen captures by the

corresponding buttons or fields discussed in the procedure text.

Title Publication Number

DeviceNet Manager Software User Manual 1787-6.5.3

ControlLogix DeviceNet Scanner Module

Installation Instructions 1756–5.66

DeviceNet Cable Planning and Installation Manual DN-6.7.2

Installation

Instructions

DeviceNet

Scanner

(1756–DNB)

DeviceNet

Manager

Software

(Version

3.0)

(1787-MGR)

User

Manual

Conv

ntion

lat

ublication

P–3

Publication

1756–6.5.15 – July 1998

This term Means

Change of State The communication module can send and receive data with slave

devices that have the change of state feature. Data is sent

whenever a data change occurs or at a user-configurable heartbeat

rate.

Communication

Module This refers to the 1756–DNB communication module.

Cyclic The communication module can send and receive data with slave

devices that have the cyclic feature. Data is only sent at a

user-configurable rate.

Dual Mode The communication module is in dual mode when it serves as a

master to one or more slaves and as a slave to another master

simultaneously.

EDS An electronic data sheet is a vendor-supplied template that dictates

how information is displayed as well as what is an appropriate

entry (value).

Explicit Messaging This messaging protocol states the meaning of the message.

The Explicit Message protocol commands the performance of a

particular task and returns the results of the task performance to

the requestor.

Heartbeat Rate The heartbeat rate is associated with producing data once every

EPR (Expected Packet Rate) duration. You may have four EPRs

before you time out. This only applies to change of state and cyclic

messaging.

Host Platform The computer that hosts the 1756–DNB communication module.

I/O I/O is an abbreviation for “input and output.”

Input Data This data is produced by a DeviceNet device and collected by the

communication module and made available for a host platform to

read.

Output Data This data is produced by a host platform that is written to the

communication module’s memory. This data is sent by the

communication module to DeviceNet devices.

MAC ID A MAC ID is the network address of a DeviceNet node.

Network This is a DeviceNet network or DeviceNet Manager software

representation of a network.

Node A node is the hardware that has a single address on the network

(also referred to as device).

Offline This is when the communication adapter is not able to

communicate on the network.

Online This is when the communication adapter is configured and enabled

to communicate on the network.

PC This is an abbreviation for an IBMcompatible personal-computer.

Poll This is a type of input/output-data communication. A poll message

solicits a response from a single, specified device on the network

(a point-to-point transfer of data).

Record This is a node address and channel-specific memory assigned in

the communication module’s non-volatile storage for a node in the

scan list.

Rx This is an abbreviation for “receive”.

Slave Mode The communication is in slave mode when it serves as a slave to

another master.

Strobe This is a type of input/output-data communication. A strobe

message solicits a response from each strobed device (a multicast

transfer). It is a 64-bit message that contains one bit for each

device on the network.

Tx This is an abbreviation for “transmit”.

rminolog

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P–4

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1756–6.5.15 – July 1998

At Rockwell Automation, customer service means experienced

representatives at Customer Support Centers in key cities

throughout the world for sales, service, and support.

Our value-added services include:

Technical Support

•SupportPlus programs

•telephone support and 24-hour emergency hotline

•software and documentation updates

•technical subscription services

Engineering and Field Services

•application engineering assistance

•integration and start-up assistance

•field service

•maintenance support

Technical Training

•lecture and lab courses

•self-paced computer and video-based training

•job aids and workstations

•training needs analysis

DeviceNet courses Designing a DeviceNet Network (course no.

CCP160) and Configuring a DeviceNet Network (course no.

CCP161) are currently offered. Contact your local authorized

Allen-Bradley distributor or sales/support office for

more information.

Repair and Exchange Services

•your only “authorized” source

•current revisions and enhancements

•worldwide exchange inventory

•local support

upport

rvic

Chapter 1

What’s

in This Chapter?

1–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

What Y

ou Need to Know

1–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Beginning the Process 1–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PlanningExamples 1–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

About This Example 1–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Part

I – Photoelectric Sensor Mapping Input Data

1–3. . . . . . . . . . . .

Part

II – RediST

TION Operator Interface Mapping Input Data

1–4. .

Part

III – RediST

TION Operator Interface Mapping Output Data

1–5.

What’s Next? 1–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Chapter 2

What’s

in This Chapter?

2–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

What Y

ou Need to Know

2–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

What Y

our Scanner Does

2–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Communicating

with Y

our Devices 2–3. . . . . . . . . . . . . . . . . . . . . .

What

Communication Module Data T

ables Are and What They Do

2–4. .

Scanner

Configuration T

able (SCT)

2–4. . . . . . . . . . . . . . . . . . . . . .

Scan

List T

able (SL

T) 2–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

DeviceNet

Manager Software as a Configuration T

ool 2–5. . . . . . . . . . .

1756–DNB

Configuration Screen-Map

2–6. . . . . . . . . . . . . . . . . . . .

What’s Next? 2–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Chapter 3

What’s

in This Chapter

3–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

What Y

ou Need to Know

3–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Beginning

the Configuration Process

3–1. . . . . . . . . . . . . . . . . . . . . . .

Online

and Of

fline Configuration

3–2. . . . . . . . . . . . . . . . . . . . . . . .

ConfiguringY

our 1756–DNB Communication Module

3–2. . . . . . . . . . .

Accessing

the Module Configuration Screen

3–3. . . . . . . . . . . . . . .

Setting

the Module’

s Operational Parameters

3–4. . . . . . . . . . . . . . .

Assigning Names From the Project 3–6. . . . . . . . . . . . . . . . . . . . . .

Accessing

the Scan List Editor Screen

3–7. . . . . . . . . . . . . . . . . . . .

Entering

the Scan List Editor Screen Through a Project

3–7. . . . . .

Entering

the Scan List Editor Screen Through Network Who

3–7. .

Using

the Scan List Editor Screen

3–8. . . . . . . . . . . . . . . . . . . . . . . . .

Scan

List Editor Functions

3–8. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Removing Devices from the Scan List 3–9. . . . . . . . . . . . . . . . . . . .

Viewing

Device Information in the Scan List

3–9. . . . . . . . . . . . . . . .

Adding

Devices to the Scan List from the Scan List Editor Screen

3–11

Configuring a Device in the Scan List

3–13. . . . . . . . . . . . . . . . . . . .



Planning Your Configuration

Before You Begin

Configuring Through

DeviceNet Manager Software

Allen-Bradley Drives

Table of Contentstoc–ii

1784-6.5.15

– July 1998

Using

the Slave Mode Function

3–14. . . . . . . . . . . . . . . . . . . . . . . . .

Determining

Data-Mapping Preferences with Auto Map

3–15. . . . . . . .

About

the Data T

able Map

3–16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Using

the Data T

able Map for Custom Editing

3–17. . . . . . . . . . . . . . .

Mapping Specific Bits to Specific Device Memory Locations 3–19. . . .

About Y

our Files

3–21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

What’s Next? 3–21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

If You Encounter Error Messages 3–21. . . . . . . . . . . . . . . . . . . . . . .

Appendix A

What’s

in This Appendix?

A–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Appendix B

What’s

in This Appendix?

B–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Understanding a Scan List Example B–2. . . . . . . . . . . . . . . . . . . . . . .

Photoelectric

Sensor Input Mapping Scheme Example

B–3. . . . . . . .

Node

Address 1 Input Data

B–4. . . . . . . . . . . . . . . . . . . . . . . . . .

Node

Address 2 Input Data

B–4. . . . . . . . . . . . . . . . . . . . . . . . . .

Node

Address 3 Input Data

B–5. . . . . . . . . . . . . . . . . . . . . . . . . .

Node

Address 4 Input Data

B–5. . . . . . . . . . . . . . . . . . . . . . . . . .

RediSTATION

Operator Interface Input Mapping Scheme Example

B–6

RediSTA

TION Operator Interface Output Mapping Scheme Example

. . .

B–7

Node

Address 5 Input and Output Data

B–8. . . . . . . . . . . . . . . . .

FLEX

I/O Module Input Mapping Scheme Example

B–9. . . . . . . . . .

FLEX

I/O Module Output Mapping Scheme Example

B–10. . . . . . . . .

Node

Address 22 Input and Output Data

B–11. . . . . . . . . . . . . . . .

Troubleshooting

Scan List Example

Chapter

Publication

1756–6.5.15 – July 1998



This chapter introduces questions you should ask before configuring

your 1756–DNB communication module. In addition, it presents an

example DeviceNet network and I/O data mapping scheme.

For information about See page

What you need to know 1–1

Beginning the process 1–1

Planning example 1–2

Mapping input data 1–3

Mapping input data 1–4

Mapping output data 1–5

To map data via your communication module, you must understand:

•your network requirements

•how to map input data

•how to map output data

Planning before configuring your communication module helps

make sure that you can:

•use your memory and bandwidth efficiently

•cater to device-specific needs and requirements

•give priority to critical I/O transfers

•leave room for expansion

A very important question to answer is “what is on your network?”

You should be familiar with each device’s:

•communication requirements

•I/O importance and size

•frequency of message delivery

You should also ask “how might this network appear in the future?”

At this point in your planning, it is advantageous for you to have

some idea of how the network could be expanded. When mapping

your I/O, you have the opportunity to allot room for future I/O. This

can save time and effort in the future.

What’

Chapt

What

now

ginning

e P

roc

ess

Allen-Bradley Drives

1–2 Planning Your Configuration

Publication

1756–6.5.15 – July 1998

The following examples illustrate a data-mapping plan for a

DeviceNet network.

About This Example

This example has the following characteristics:

•a PC host platform

•a 1756–DNB communication module

•a Series 9000 photoelectric sensor (strobed)

•a RediSTATION operator interface (polled)

Important: In the following examples, output is data sent to a

device. Input is data collected from a device.

PC running Windows

NT or Windows 95

containing DeviceNet

Manager software

DeviceNet network

Two input bits from the photoelectric

sensor will be mapped: one status bit and

one data bit.

Two input bits from the RediSTATION

operator interface will be mapped: one bit

for the green start button and one bit for the

red stop button. One output bit for the

operator interface will also be mapped: one

bit for the operator interface’s indicator light

(on/off). Bit 4 of the input byte indicates if

the bulb is missing.

Series 9000 photoelectric sensor RediSTATION operator interface

indicator light

green start button

red stop button

1 byte 1 byte

1 byte

input

output

The photoelectric sensor

produces one byte of input

data in response to the

strobe message.

The RediSTATION

operator interface produces

one byte of input data and

consumes one byte of

output data.

status

bit

data

bit

bit for green button

bit for

red button

bit for

indicator light

Node 1

Node 2

RediStation

operator interface

photoelectric

sensor

input

1770–KFD

communciation

module

Node 62

1756–DNB in ControlLogix chassis

DEVICENET

01234567

Node 15

lanning

ampl

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