Rockwell Automation 1747-SN User Manual

Remote I/O Scanner

1747-SN

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.ab.com/manuals/gi) 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.

WARNING

IMPORTANT

ATTENTION

SHOCK HAZARD

BURN HAZARD

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.

Identifies information that is critical for successful application and understanding of the product.

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

• recognize the consequence

Labels may be located on or inside the equipment (e.g., drive or motor) to alert people that dangerous voltage may be present.

Labels may be located on or inside the equipment (e.g., drive or motor) to alert people that surfaces may be dangerous temperatures.

Summary of Changes

The information below summarizes the changes to this manual since the last printing. Updates to the manual include using RSLogix 500 instead of APS software.

To help you find new and updated information in this release of the manual, we have included change bars as shown to the right of this paragraph.

The table below lists the sections that document new features and additional or updated information on existing features.

For this information: See

configuring RIO using G Files page 4-4

using block transfer instruction (BTR and BTW)

removed Chapter 7 application examples can be found in

configuring G files using RSLogix 500 page B-9

block transfer examples for earlier processors

page 5-5

Chapter 4 and Chapter 5

Appendix D

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Summary of Changes 2

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Important User Information . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Table of Contents Chapter 1 Overview

System Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Scanner I/O Image Division . . . . . . . . . . . . . . . . . . . . . 1-3

How the Scanner Scans Remote I/O . . . . . . . . . . . . . . . . . 1-4

SLC and Scanner Asynchronous Operation . . . . . . . . . . 1-4

How the Scanner Interacts with Adapters . . . . . . . . . . . . . . 1-5

Scanner I/O Image Concepts . . . . . . . . . . . . . . . . . . . . . . . 1-6

Example Scanner I/O Image. . . . . . . . . . . . . . . . . . . . . 1-7

Transferring Data with RIO Discrete and Block Transfers 1-9

Physical and Logical RIO Link Specifications . . . . . . . . . 1-9

Extended Node Capability . . . . . . . . . . . . . . . . . . . . . . 1-9

Complementary I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10

Complementary I/O: Placing Modules with 2-Slot Addressing

1-12

Complementary I/O: Placing Modules with 1-Slot Addressing

1-13

Complementary I/O: Placing Modules with 1/2-Slot

Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14

Summary for Placing Modules Used In Complementary I/O.

1-15

Complementary I/O Application Considerations . . . . . . 1-17

Complementary 1771 I/O Module Details . . . . . . . . . . . 1-17

Hardware Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-18

Baud Rate DIP Switch . . . . . . . . . . . . . . . . . . . . . . . . . 1-18

LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19

RIO Link Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19

Compatible Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19

Chapter 2

Quick Start for Experienced Users

Required Tools and Equipment . . . . . . . . . . . . . . . . . . . . . 2-1

Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Chapter 3

Installation and Wiring

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Compliance to European Union Directives . . . . . . . . . . . . . 3-1

EMC Directive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Baud Rate Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Scanner Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Insertion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

RIO Link Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

New Installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

For Series A Scanner Retrofits . . . . . . . . . . . . . . . . . . . . 3-7

Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7

Scanner Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8

At Power Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8

In Run Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8

Table of Contents 2

Scanner Configuration and Programming

When Changing From Run Mode . . . . . . . . . . . . . . . . . 3-8

Status LEDs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

Chapter 4

Understanding Remote Input and Output Image Files. . . . . 4-1

RIO Configuration Using G Files . . . . . . . . . . . . . . . . . . . . 4-4

Rules for Configuring the Scanner. . . . . . . . . . . . . . . . . 4-7

Considerations When Configuring Remote I/O . . . . . . . . . . 4-12

G File Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . 4-12

Crossing Logical Rack Boundaries . . . . . . . . . . . . . . . . 4-13

Understanding M Files. . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14

M Files Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14

M0 Control File Description . . . . . . . . . . . . . . . . . . . . . 4-16

M0 File - RIO Device Inhibit Control. . . . . . . . . . . . . . . 4-17

M0 File - RIO Device Reset Control. . . . . . . . . . . . . . . . 4-18

M0 File - Remote Output Reset Control. . . . . . . . . . . . . 4-19

Device Reset and Remote Output Reset Considerations. . . . 4-21

M1 Status File Description . . . . . . . . . . . . . . . . . . . . . . . . . 4-23

General Communication Status - Enable Device Fault Bit. . .

4-23

General Communication Status - Communication Attempted

Bit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-23

RIO Baud Rate Status . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24

Logical Device Starting Address Status . . . . . . . . . . . . . 4-24

Logical Device Image Size Status . . . . . . . . . . . . . . . . . 4-25

Active Device Status. . . . . . . . . . . . . . . . . . . . . . . . . . . 4-26

Logical Device Fault Status . . . . . . . . . . . . . . . . . . . . . . 4-27

RIO Status Example . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-28

RIO Communication Retry Counter (M1:e.16 -47) . . . . . . . . 4-30

Understanding Slot Addressing . . . . . . . . . . . . . . . . . . . . . 4-32

SLC/Scanner Configuration . . . . . . . . . . . . . . . . . . . . . . . . 4-33

RIO Block Transfer

Troubleshooting

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Chapter 5

RIO Block Transfer Theory of Operation . . . . . . . . . . . . . . 5-1

What Is RIO Block Transfer? . . . . . . . . . . . . . . . . . . . . 5-1

Using Block Transfer Instructions (BTR and BTW) . . . . . . . 5-5

RIO Block Transfer General Functional Overview . . . . . 5-5

Parameters for BTR and BTW. . . . . . . . . . . . . . . . . . . . 5-6

Control Status Bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7

Instruction Operation. . . . . . . . . . . . . . . . . . . . . . . . . . 5-11

Programming Examples . . . . . . . . . . . . . . . . . . . . . . . . 5-12

Comparison to the PLC-5 BTR and BTW . . . . . . . . . . . . 5-16

Chapter 6

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

Specifications

M0 - M1 Files and G Files

Table of Contents 3

Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

Retry Counters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

Block Transfers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

Appendix A

Scanner Operating Specifications . . . . . . . . . . . . . . . . . . . . A-1

Network Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1

Throughput Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . A-2

RIO Network Throughput Components. . . . . . . . . . . . . A-2

Calculating Throughput. . . . . . . . . . . . . . . . . . . . . . . . . . . A-3

Discrete I/O Throughput without Block Transfers (Tdm-nbt)

Present . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3

Discrete I/O Throughput with Block Transfers (Tdm-bt)

Present . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-6

Block Transfer Throughput . . . . . . . . . . . . . . . . . . . . A-10

RIO Scanner Output Delay Time (TSNo) Tables . . . . . A-13

Appendix B

M0 - M1 Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1

Addressing M0-M1 Files . . . . . . . . . . . . . . . . . . . . . . . . B-2

Restrictions on Using M0-M1 Data File Addresses . . . . . B-2

Monitoring Bit Addresses . . . . . . . . . . . . . . . . . . . . . . . B-2

Transferring Data Between Processor Files and M0 or M1 Files

B-4

Access Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-4

Minimizing the Scan Time . . . . . . . . . . . . . . . . . . . . . . B-7

Capturing M0-M1 File Data. . . . . . . . . . . . . . . . . . . . . . B-8

Specialty I/O Modules with Retentive Memory . . . . . . . B-8

G Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-9

Configuring G Files using RSLogix 500 . . . . . . . . . . . . . B-9

After all devices have been properly mapped, click OK and

the G file is automatically configured. This procedure

eliminates the bit by bit process needed to configure the G

file with other programming tools. . . . . . . . . . . . . . . . B-13

Editing G File Data . . . . . . . . . . . . . . . . . . . . . . . . . . B-14

RIO Configuration Worksheet

Block Transfer Examples for Earlier Processors

Appendix C

Directions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-1

Appendix D

BTR and BTW Control Logic Examples . . . . . . . . . . . . . . . D-1

Block Transfer Read Control Logic Example . . . . . . . . . D-1

Block Transfer Write Control Logic Example . . . . . . . . D-4

Directional Continuous Block Transfer Example . . . . . . D-6

Directional Repeating Block Transfer Example . . . . . . . D-9

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Table of Contents 4

Glossary Index

Directional Non-Continuous Block Transfer Example . D-12

Bidirectional Continuous Block Transfer Example . . . . D-16

Bidirectional Alternating Block Transfer . . . . . . . . . . . D-21

Bidirectional Alternating Repeating Block Transfer . . . D-27

Rockwell Automation Support . . . . . . . . . . . . . . . . . . . . . . 1-7

Installation Assistance . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

New Product Satisfaction Return. . . . . . . . . . . . . . . . . . 1-7

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Overview

This chapter contains the following information:

• system overview

• how the scanner interacts with the SLC processor

• how the scanner interacts with adapter modules

• scanner I/O image concepts

• extended node capability

• complementary I/O

• scanner features

• compatible network devices

Chapter

System Overview

The Remote I/O (RIO) Scanner, Catalog Number 1747-SN, is the remote I/O scanner for the SLC 500. It enables communication between an SLC processor (SLC 5/02 or later) and remotely located (3,048 meters [10,000 feet] maximum) 1746 I/O chassis and other RIO compatible Allen-Bradley operator interface and control devices. The 1747-SN Scanner communicates with remotely located devices using the Allen-Bradley Remote I/O link. The RIO link consists of a single master (scanner) and multiple slaves (adapters). Communication between devices occurs over twisted pair cable with the devices daisy-chained together. The scanner can reside in any slot of the local SLC chassis except for slot 0.

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1-2 Overview

SLC 5/02 or Later Processor

Local SLC Chassis

Dataliner Message Display

(Adapter/Slave)

RIO Scanner (Master of the RIO Link)

The scanner transfers input and output data between itself and all configured network devices over twisted pair cable. Note that the end-to-end length of the cable can be a maximum of 3,048 meters (10,000 feet).

PanelView Operator Terminal (Adapter/Slave)

The scanner can be configured for and transfer a maximum of 4 logical racks of discrete data on the RIO link. The scanner provides discrete I/O and block (Series B or later) transfers. Configurations allowed are any combination of quarter, half, three-quarter, or full logical rack devices.

1747-ASB Module (Adapter/Slave)

Remote Chassis

Remote Expansion Chassis

RediPANEL (Adapter/Slave)

SLC 5/02 or Later Processor

Adapter 1

Half Logical Rack Device

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RIO Scanner

Adapter 2

Quarter Logical Rack Device

The scanner transfers discrete input and output data between itself, remote adapters, and the SLC processor.. Remote adapters consist of 1746 chassis and other Allen-Bradley operator interface and control devices.

Adapter 3 Adapter 4

Half Logical Rack Device

Three-Quarter Logical Rack Device

Adapter 5

Full Logical Rack Device

Adapter 6

Full Logical Rack Device

The SLC processor transfers the scanner’s 4 logical racks (32 input image and 32 output image words) of discrete remote I/O image data into the SLC input and output image files. You can adjust the size of the scanner input and output image file during configuration of your SLC system so that the scanner only transfers the discrete I/O data

Overview 1-3

your application program requires. Configuration is done through the confiGuration file (G file). Refer to Chapter 4, Configuration and Programming, for more information.

IMPORTANT

The SLC 500 processor (SLC 5/02 or later) supports multiple scanners in its local I/O chassis. The maximum number is dependent on the following:

• backplane power requirements (power supply dependent)

• SLC 500 processor I/O data table limit (4,096 I/O)

• processor memory to support the application

(SLC 500 processor dependent)

Scanner I/O Image Division

The scanner allows each adapter to use a fixed amount (user defined) of the scanner’s input and output image. Part of the SLC processor’s image is used by local I/O, the other portion is used by the scanner for remote I/O.

The scanner remote I/O image is divided into logical racks and further divided into logical groups. A full logical rack consists of eight input and eight output image words. A logical group consists of one input and one output word in a logical rack. Each logical group is assigned a number from 0 to 7.

Local I/O

Logical Rack 0

Remote I/O

(Scanner Image)

Processor I/O Image Scanner I/O Image Adapter

Logical Rack 1

Logical Group 0

Logical Rack 2

Logical Group 7

Image

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1-4 Overview

The scanner image contains the image of each adapter on the RIO link. The adapter is assigned a portion of the scanner image, which is referred to as the adapter image.

How the Scanner Scans Remote I/O

The scanner communicates with each logical device in a sequential fashion. First, the scanner initiates communication with a device by sending output data to the device. The device then responds by sending its input data back to the scanner, as illustrated below. You refer to this exchange as a discrete I/O transfer. After the scanner completes its discrete I/O transfer with the last configured network device, it begins another discrete I/O transfer with the first device.

It is important to understand that the scanner transfers RIO data on a logical device basis not on an adapter basis. A logical device is a full logical rack or portion of a logical rack assigned to an adapter.

RIO Scanner Scan

The scanner updates its input image file each time it scans a logical device.

Scanner Input Image File

Input Device 3

Output Device 3

Output Device 2

Input Device 1

Output Device 1

Input Device 2

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Scanner Output Image File

SLC and Scanner Asynchronous Operation

The SLC processor scan and RIO scanner scan are independent (asynchronous) of each other. The SLC processor reads the scanner input image file during its input scan and writes the output image file to the scanner during its output scan. The RIO scanner continues reading inputs and writing outputs to the scanner I/O image file, independent of the SLC processor scan cycle.

Depending on your SLC processor, RIO link configuration, and application program size, the scanner may complete multiple scans before the SLC processor reads the scanner’s input image file. The RIO scanner updates its I/O files on a per logical rack basis.

The figure below illustrates the asynchronous operation of the SLC

processor and RIO scanner.

SLC Processor Scan Cycle RIO Scanner Scan Cycle

Overview 1-5

The SLC processor reads the scanner input image file into the SLC input image file, processes it, and creates an SLC output image file. The SLC processor

ransfers its output file to the

scanner..

Important: The outputs of the RIO are updated after the end of the first SLC processor scan.

Program

SLC Processor

How the Scanner Interacts with Adapters

Input Image Device 1

Input Image Device 2

Output Image Device 1

The scanner updates its input image file each time it scans a logical device. The scanner may scan all of its configured logical devices several times before the SLC processor reads the scanner's input image file.

SLC Input Image File

SLC Output Image File

Scanner Input Image File

Input Image Device 3

Output Image Device 2

Scanner Output Image File

Output Image Device 3

The scanner’s function is to continuously scan the adapters on the RIO link in a consecutive manner. This scan consists of one or more RIO discrete transfers to each adapter on the RIO link.

RIO discrete transfers consist of the scanner sending output image data and communication commands to the adapter that instruct the adapter on how to control its output. (These include run, adapter reset, and reset decide commands.) The adapter responds by sending input data to the scanner. The scanner performs as many RIO discrete transfers as necessary to update the entire adapter image. If RIO discrete transfers do not occur, data is not exchanged between the scanner and adapter. RIO discrete transfers are asynchronous to the processor scan.

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1-6 Overview

SLC Local Chassis

Processor

Scanner

RIO Discrete Transfers with Adapter 1

RIO Discrete Transfers with Adapter 2

RIO Discrete Transfers with Adapter 3

RIO Discrete Transfers with Adapter 4

PanelView Operator Terminal

RediPANEL

Scanner I/O Image Concepts

The scanner’s I/O image consists of RIO logical racks and I/O groups. A full RIO logical rack consists of eight input image and eight output image words. (A word consists of 16 bits of data.) Each word within an RIO logical rack is assigned an I/O group number from 0 to 7.

You assign devices on the RIO link a portion of the scanner’s image. Devices can occupy a quarter logical rack (2 input and output words), half logical rack (4 I/O words), three-quarter logical rack (6 I/O words), or full logical rack. You may configure devices to start at any even I/O group number within an RIO logical rack. More than one physical device’s (adapter) I/O information can reside in a single logical rack. Also, by crossing logical rack boundaries, a device can consist of more than one logical rack.

IMPORTANT

The following illustration shows only the input image configuration of the scanner’s I/O image. The output image configuration is the same.

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Input Image Half of a Scanner's I/O Image

Overview 1-7

RIO Logical Rack 0

RIO Logical Rack 1

RIO

Logical Rack 2

RIO

Logical Rack 3

Bit Number (decimal)

Rack 0 Group 0

Rack 0 Group 1

Rack 0 Group 2

Rack 0 Group 3

Rack 0 Group 4

Rack 0 Group 5

Rack 0 Group 6

Rack 0 Group 7

Rack 1 Group 0

Rack 1 Group 1

Rack 1 Group 2

Rack 1 Group 3

Rack 1 Group 4

Rack 1 Group 5

Rack 1 Group 6 Rack 1 Group 7 Rack 2 Group 0

Rack 2 Group 1

Rack 2 Group 2

Rack 2 Group 3

Rack 2 Group 4

Rack 2 Group 5

Rack 2 Group 6

Rack 2 Group 7

Rack 3 Group 0

Rack 3 Group 1

Rack 3 Group 2

Rack 3 Group 3

Rack 3 Group 4

Rack 3 Group 5

Rack 3 Group 6

Rack 3 Group 7

Word 0

Word 1 Word 2

Word 3

Word 4

Word 5 Word 6

Word 7

Word 8

Word 9

Word 10

Word 11

Word 12

Word 13

Word 14 Word 15 Word 16

Word 17

Word 18

Word 19

Word 20 Word 21

Word 22

Word 23

Word 24

Word 25

Word 26

Word 27

Word 28

Word 29 Word 30

Word 31

Bit Number (octal)

0123456789101112131415

Quarter Logical Rack

Not Used In This Example

Half Logical Rack

Not Used In This Example

Three-Quarter Logical Rack

Not Used In This Example

Full Logical Rack

1828384858687

8108118128138148158168178

Example Scanner I/O Image

The illustrations below show a scanner’s input image of 4 RIO link devices.

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1-8 Overview

SLC 5/02 or Later Processor

RIO Scanner

RIO

Logical

Rack 0

RIO

Logical

Rack 1

RIO

Logical

Rack 2

RIO

Logical

Rack 3

Device 1

Full Logical Rack Device Begins at Logical Rack 0, Group 0.

Important: The illustration below shows only the scanner's input image. The output image looks the same.

Bit Number

Rack 0 Group 0

Rack 0 Group 1

Rack 0 Group 2

Rack 0 Group 3

Rack 0 Group 4

Rack 0 Group 5

Rack 0 Group 6

Rack 0 Group 7

Rack 1 Group 0

Rack 1 Group 1

Rack 1 Group 2

Rack 1 Group 3

Rack 1 Group 4

Rack 1 Group 5

Rack 1 Group 6 Rack 1 Group 7 Rack 2 Group 0

Rack 2 Group 1

Rack 2 Group 2

Rack 2 Group 3

Rack 2 Group 4

Rack 2 Group 5

Rack 2 Group 6

Rack 2 Group 7

Rack 3 Group 0

Rack 3 Group 1

Rack 3 Group 2

Rack 3 Group 3

Rack 3 Group 4

Rack 3 Group 5 Rack 3 Group 6

Rack 3 Group 7

Bit Number (octal)

Word 0

Word 1

Word 2

Word 3

Word 4

Word 5 Word 6

Word 7

Word 8

Word 9

Word 10

Word 11

Word 12

Word 13

Word 14

Word 15 Word 16

Word 17

Word 18

Word 19

Word 20 Word 21

Word 22

Word 23

Word 24

Word 25

Word 26

Word 27

Word 28

Word 29

Word 30

Word 31

Device 2

Three-Quarter Logical Rack Device Begins at Logical Rack 1, Group 0.

Device 3 Device 4

Half Logical Rack Device Begins at Logical Rack 2, Group 0.

8108118128138148158168178

e = slot number of the SLC chassis containing the scanner

Quarter Logical Rack Device Begins at Logical Rack 2, Group 4.

Input File

0123456789101112131415

Address

I:e.0 I:e.1 I:e.2 I:e.3 I:e.4 I:e.5 I:e.6 I:e.7 I:e.8 I:e.9 I:e.10 I:e.11 I:e.12 I:e.13 I:e.14 I:e.15 I:e.16 I:e.17 I:e.18 I:e.19 I:e.20 I:e.21 I:e.22 I:e.23 I:e.24 I:e.25 I:e.26 I:e.27 I:e.28 I:e.29 I:e.30 I:e.31

1828384858687

Device 1

Device 2

Not Used

Device 3

Device 4

Not Used

Publication 1747-UM013B-EN-P - January 2005

Overview 1-9

Transferring Data with RIO Discrete and Block Transfers

Input and output image data and command information are quickly exchanged between a scanner and adapter using RIO discrete transfers. RIO discrete transfers are the simplest and fastest way a scanner and adapter communicate with each other. RIO discrete transfers, which are transparent to the user, consist of the scanner sending the output image data to the adapter, and the adapter transmitting input data to the scanner. Each RIO discrete transfer also contains scanner commands for the adapter.

Through your control program, you command the SLC processor to initiate RIO block transfers, which directs the scanner to exchange large amounts of data to/from an adapter. Block Transfers (BTs) use the basic RIO discrete transfer mechanism of the RIO link. However, the actual transfer of data occurs asynchronous to the discrete transfers. It is possible for several discrete transfers to occur before the scanner processes a block transfer. Refer to Chapter 5, RIO Block Transfer for more details.

Physical and Logical RIO Link Specifications

The maximum number of adapters with which your scanner can communicate is determined by the scanner’s and adapter’s physical and logical specifications, as described below:

• Physical Specifications are the maximum number of adapters that can be connected to the scanner. For more information, see Extended Node Capability below.

• Logical Specifications for the scanner are the maximum number of logical racks the scanner can address, how the logical racks can be assigned, and whether the scanner can perform BTs.

Extended Node Capability

Extended node functionality allows you to connect up to 32 physical devices on an RIO link. You must use 82 Ohm RIO link resistors in an extended node configuration. You can only use extended node if all RIO link devices have extended node capability. (Refer to the Compatible Devices table at the end of this chapter, or to the specifications of your device.) The 1747-SN Series B Scanner has extended node capability. However, the smallest logical rack division is 1/4 logical rack and the scanner image size is 4 logical racks. Therefore, the scanner is limited to 16 devices unless complementary

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1-10 Overview

I/O is used. Refer to the following section for more information on complementary I/O.

Complementary I/O

Complementary I/O is very useful when portions of your input and output images are unused because it allows the images of two adapters to overlap each other in the scanner’s I/O image. To use complementary I/O, the I/O image from one adapter must be the mirror (complement) of the other. This means that there must be an input module in the primary chassis and an output module in the same slot of the complementary chassis. This enables total use of the scanner’s 32 input and 32 output word image for I/O addressing of up to 1024 discrete points.

ATTENTION

Because the primary and complementary chassis images overlap, input and specialty combination I/O modules must never share the same image location. Inputs received by the scanner may be incorrect and RIO block transfers will not be serviced properly. If an output module shares its output image with another output module, both output modules receive the same output information.

If you want to use complementary I/O, two adapters that support this function are required (e.g., 1747-ASB modules). One adapter is configured (via its DIP switches) as a primary chassis, the other as a complementary chassis. If a primary chassis exists, it is scanned first.

Primary and complementary chassis cannot have the same logical rack number. The logical rack numbers must be assigned to the primary and complementary racks as shown below:

Primary Chassis Logical Rack Number

Complementary Chassis Logical Rack Number

Decimal Octal

Publication 1747-UM013B-EN-P - January 2005

0810

1911

21012

31113

Overview 1-11

ATTENTION

If the logical rack numbers are not properly assigned, unpredictable operation of both ASB modules results. No ASB module errors occur. Refer to your ASB module user manual for specific information on setting the address of the complementary chassis. (For example, in the 1771-ASB manual the addresses for the complementary chassis are referred to as complementary chassis 0-3.)

Guidelines for Configuring Complementary I/O

When you configure your remote system for complementary I/O, follow these guidelines:

• You can place an output module in the primary chassis opposite another output module in the complementary chassis; they use the same bits in the output image table. However, we do not recommend this placement of modules for redundant I/O.

• You cannot use complementary I/O with a chassis that uses 32-point I/O modules and 1-slot addressing or 16-point I/O modules with 2-slot addressing.

• Do not place an input module in the primary chassis opposite an input module in the complementary chassis; they will use the same bits in the input image table.

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1-12 Overview

Example 1

Complementary I/O: Placing Modules with 2-Slot Addressing

The following figures illustrate a possible module placement to configure complementary I/O using 2-slot addressing.

Example 2

I 8

012345

O 8

I 16

012345

I 8

O 8

O 16

O 8

I 8I 8

I 16

O 8

O 16

I 16

E M P T Y

I 16

O 16O 8O 8

E M

8O 8

T Y

O 16

I 16

O 16

E M P T Y

I 16

O 8

I 8 O 8

O 16

I 16

O 16

Publication 1747-UM013B-EN-P - January 2005

Outputs in the complementary chassis would use the same bits in the output image table as the outputs in the primary chassis. You cannot place inputs in the complementary chassis.

1 = Output modules use the same output image table bits. This is not recommended. 2 = Must be empty if corresponding primary slot is a block transfer module.

Important: With 2-slot addressing, if an input module resides in either slot associated with a logical group of the primary chassis, an input module cannot reside in that logical group' s complementary chassis.

Example 1

Overview 1-13

Complementary I/O: Placing Modules with 1-Slot Addressing

The figure below illustrates a possible module placement to configure complementary I/O using 1-slot addressing.

Example 2

I 16

01234 5

O 16O 16I 16I 16

I 16

01234 5

16O16

16I 16I 16I 16I 16I 16I 16I 16I 16

O 16

I 16

O 16

I 16

BT I

67 0 1 2 3

O 16

67 0 1 2 3

16O 16O 16

E M P

I 16

I 16O 16

I 16

O 16O 16

I = Input Module (8- or 16-point) O = Output Module (8- or 16-point) BT = Block Transfer Module 1 = Output modules use the same output image table bits. This is not recommended.

2 = Must be empty if corresponding primary slot is block transfer..

O 16O 16O 16O 16O 16O 16O 16O 16O 16O 16

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1-14 Overview

Example 1

Complementary I/O: Placing Modules with 1/2-Slot Addressing

The figure below illustrates a possible module placement to configure complementary I/O using 1-slot addressing.

IIOOO O BT I

Example 2

01 23 45 67 01 23

OOII IOO1I

I I

01 23 45 67 01 23 45 67 01 23

IIIIIIII

OOO OOO OO

45 67 01 23

E M P T Y

Publication 1747-UM013B-EN-P - January 2005

I = Input Module (8-, 16-, or 32-point) O = Output Module (8-, 16-, or 32-point) BT = Block Transfer Module

1 = Output modules use the same output image table bits. This is not recommended. 2 = Must be empty if corresponding primary slot is block transfer.

Overview 1-15

Summary for Placing Modules Used In Complementary I/O

Discrete Modules

Addressing Method Types of Modules used Placement

2-slot 8-point Install input modules

opposite output modules, and output modules

opposite input modules.

1-slot 8-point, 16-point

1/2-slot 8-point, 16-point, 32-point

(1) If an input module resides in either slot associated with a logical group of the primary chassis, an input module

cannot reside in that logical group’s complementary chassis.

Block Transfer Modules

(1)

Addressing Method Placement

2-slot The right slot of the primary I/O group can be another block

transfer module, or an 8-point input or output module.

The left slot of the complementary I/O group must be empty.

In the right slot of the complementary I/O group, you can place an 8-point output module; this slot must be empty if the corresponding slot in the primary I/O group is a block transfer module.

1-slot Leave the corresponding I/O group in the complementary

chassis empty.

1/2-slot Leave the corresponding I/O group in the complementary

chassis empty.

The following example illustrates how I/O modules requiring two words of the input or output image can leave unused image space.

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1-16 Overview

OOOO

IIII

012 3 45 678

Slot Slot

Slot Pair

1234

I = Input Module

= Output Module

Primary Chassis

Primary Chassis Configured As:

Logical Rack Number 0

Logical Group Number 0

Image Size (logical groups) 16

Addressing Mode 1/2-slot

Primary/Complementary Primary

Primary Chassis I/O Image Complementary Chassis I/O Image

Input Image

from Primary Chassis

701017

Slot 1 Slot 1 Slot 2 Slot 2 Slot 3 Slot 3 Slot 4 Slot 4 Slot 5 Slot 5

Slot 6

Slot 6 Slot 7 Slot 7 Slot 8 Slot 8

07815

Slot 1 Slot 1 Slot 2 Slot 2 Slot 3 Slot 3 Slot 4 Slot 4 Slot 5 Slot 5

Slot 6

Slot 6 Slot 7 Slot 7 Slot 8 Slot 8

Octal

Decimal

Slot Pair

Output Image

from Primary Chassis

701017

Decimal

Slot 1 Slot 1 Slot 2 Slot 2 Slot 3 Slot 3 Slot 4 Slot 4 Slot 5 Slot 5 Slot 6 Slot 6 Slot 7 Slot 7 Slot 8 Slot 8

07815

Slot 1

Slot 2

Slot 3

Slot 4

Slot 5 Slot 5 Slot 6 Slot 6 Slot 7 Slot 7 Slot 8 Slot 8

Input Image

Octal

Slot Pair Slot Pair Slot Pair

from Complementary Chassis

Slot 1

Slot 2

Slot 3

Slot 4

Slot 5 Slot 5 Slot 6 Slot 6 Slot 7 Slot 7 Slot 8 Slot 8

= unused image space

OOOO

IIII

012 3 45 678

Slot Pair

1234

Complementary Chassis

Complementary Chassis Configured As:

Logical Rack Number 8 (decimal)

Logical Group Number 0

Image Size (logical groups) 16

Addressing Mode 1/2-slot

Primary/Complementary Complementary

701017

Slot 1 Slot 1 Slot 2 Slot 2 Slot 3 Slot 3 Slot 4 Slot 4 Slot 5 Slot 5 Slot 6 Slot 6 Slot 7 Slot 7 Slot 8 Slot 8

Decimal

07815

from Complementary Chassis

Octal

Output Image

701017

Slot 1

Slot 2

Slot 3

Slot 4

Slot 5

Slot 6

Slot 7

Slot 8

Octal

Decimal

07815

Scanner's I/O Image

Both images are overlapped in the

scanner. The overlapped image

appears where the primary chassis

image is configured to reside.

In this case, the primary chassis

image is configured as starting

logical rack 0 and starting logical

group 0.

Publication 1747-UM013B-EN-P - January 2005

Logical

Rack 0

Logical

Rack 1

Group 0 Group 1 Group 2 Group 3 Group 4 Group 5 Group 6 Group 7 Group 0 Group 1 Group 2 Group 3 Group 4 Group 5 Group 6 Group 7

Input Image Output Image

Slot 1 Slot 1 Slot 2 Slot 2 Slot 3 Slot 3 Slot 4 Slot 4 Slot 5 Slot 5 Slot 6 Slot 6 Slot 7 Slot 7 Slot 8 Slot 8

701017

Octal

Decimal

07815

Slot 1 Slot 1

Slot 2 Slot 2 Slot 3 Slot 3

Slot 4 Slot 4

Slot Pair Slot Pair

Slot 5 Slot 5

Slot 6 Slot 6 Slot 7 Slot 7

Slot 8 Slot 8

Slot 1 Slot 1 Slot 2 Slot 2 Slot 3 Slot 3 Slot 4 Slot 4 Slot 5 Slot 5 Slot 6 Slot 6 Slot 7 Slot 7 Slot 8 Slot 8

701017

Slot 1 Slot 1 Slot 2 Slot 2 Slot 3 Slot 3 Slot 4 Slot 4 Slot 5 Slot 5 Slot 6 Slot 6 Slot 7 Slot 7 Slot 8 Slot 8

Octal

Decimal

07815

Logical

Rack 0

Word 0 Word 1

Word 2

Word 3 Word 4

Word 5 Word 6 Word 7

Overview 1-17

Complementary I/O Application Considerations

If you configure a complementary device to use more I/O image space than an associated primary device, then block transfers can only be performed to locations in the complementary device that have associated I/O image space in the primary device. For example, if a primary device is 1/2 logical rack and a complementary device is a full logical rack, block transfers can be performed only in the first 1/2 logical rack of the complementary device. Attempting block transfers in the last half of the complementary device will result in a BT error (error - 11 - device not configured).

1/2 logical rack

1/2 logical rack configured and usable

1/2 logical rack not configured

Logical Rack 8

Word 0

Word 1

Word 2

Word 3 Word 4

Word 5 Word 6 Word 7

1/2 logical rack

ured and us

confi

configured and usable

1/2 logical rack

confi

ured, but no

usable for BT sinc

configured, but not

Words 4-7 are not

usable for BT since

configured for the

Words 4 to 7 are not

primary device.

configured for the primary device.

Complementary 1771 I/O Module Details

Use the following modules in either primary or complementary I/O chassis opposite any type of module:

• Communication Adapter Module (1771-KA2)

• Communication Controller Module (1771-KE)

• PLC-2 Family/RS-232-C Interface Module (1771-KG)

• Fiber Optics Converter Module (1771-AF)

• DH/DH+ Communication Adapter Module (1785-KA)

• DH+/RS-232C Communications Interface Module (1785-KE)

Use the following modules in either primary or complementary I/O chassis opposite any type of module. However, these modules do not work as stand-alone modules; each one has an associated master module. Use care when placing the master modules in the I/O chassis:

• Analog Input Expander Module (1771-E1, -E2, -E3)

• Analog Output Expander Module (1771-E4)

• Servo (Encoder Feedback) Expander Module (1771-ES)

• Pulse Output Expander Module (1771-OJ)

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1-18 Overview

Hardware Features

Below are the scanner’s features. You can find LED information in Chapter 6, Troubleshooting.

SCANNER

COMM FAULT

SW1

1 2 KBAUD

ONON57.6

OFF

115.2

OFF

230.4

OFF OFF

230.4

CONNECT ONE END OF

CABLE SHIELD TO CHASSIS

MOUNTING BOLT. REFER T O

USER'S MANUAL.

LINE 1

SHIELD

LINE 2

1747±SN

CAT

SERIAL NO.

Remote I/O Scanner

SLC 500

SER

FAC

)

CLASS I, GROUPS A, B, C AND D, DIV.2

FOR HAZ. LOC. A196

LISTED IND. CONT. EQ.

)

OPERATING

TEMPERATURE

CODE T3C

HOST

FRN.:

CURRENT REQUIREMENT: 600 mA @5VDC

FRN.:

PLUG

MAKE IN U.S.A.

1. Status Led Displays normal communication and fault status

2. Front Label Allows user to record configured baud rate

3. RIO Link Connector Allows for connections to RIO link devices

4. Cable Tie Slots Secures communication wiring from module

5. Self-Locking Tabs Secures module in chassis slot

6. Side Label (Nameplate) Provides module information

7. Baud Rate DIP Switch Allows user to set baud rate

Baud Rate DIP Switch

The Baud Rate DIP switch selects the RIO link baud rate. The baud rates are:

• 57.6 Kbaud

• 115.2 Kbaud

• 230.4 Kbaud

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IMPORTANT

For proper system operation, the baud rate of all devices on the RIO link must be the same.

Overview 1-19

LEDs

Two LEDs allow you to monitor scanner and communication status.

FAULT LED - allows you to monitor scanner status. This LED is red. The FAULT LED’s normal state is off; therefore, it is off whenever the scanner is operating properly.

COMM LED - allows you to monitor communication with all configured devices. This LED is green and its normal state is on once the processor has entered Run mode. The LED is red if there is a communication problem. The COMM LED status information is valid only when the FAULT LED is off.

RIO Link Connector

This 3-pin male connector connects the scanner to the RIO link. The Allen-Bradley repair part number is 1746-RT29.

Compatible Devices

Catalog Number Device Comments

1785-LT/x

1785-LT2

1785-LT3

1785-L30x

1785-L40x

1785-L60x

1771-ASC Remote I/O Adapter Module -

1771-ASB

1771-AM1

1771-AM2

1784-F30D

1771-RIO Remote I/O Interface Module -

(1) (2)

(1)(2)

(3) (4)

(1)

PLC- 5/15 (in adapter mode) -

PLC- 5/25 (in adapter mode) -

PLC- 5/12 (in adapter mode) -

PLC- 5/30 (in adapter mode) -

PLC- 5/40 (in adapter mode) -

PLC- 5/60 (in adapter mode) -

Remote I/O Adapter Module -

1-Slot I/O Chassis W/Integral Power Supply and Adapter

2-Slot I/O Chassis W/Integral Power Supply and Adapter

Plant Floor Terminal Remote I/O Expansion Module

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1-20 Overview

Catalog Number Device Comments

1771-JAB

(1)

Single Point I/O Adapter Module Single Point I/O

Adapter Module

1771-DCM Direct Communication Module -

1778-ASB

1747-DCM

2706-xxxx

2705-xxx

(1)

(1)(5)

(1)

Remote I/O Adapter Module -

Direct Communication Module -

DL40 Dataliner -

RediPANEL Requires half logical rack configuration if you want to use

stored messages.Requires half logical rack configuration if you want to use stored messages.

2711-xx

(1)

PanelView Terminal You can address PanelView Terminals as up to four full

logical racks of discrete I/O. You can also assign partial logical racks.You can address PanelView Terminals as up to four full logical racks of discrete I/O. You can also assign partial logical racks.

1336-G2

(1)

Remote I/O Adapter for 1336 AC Industrial

Drives

1395-NA

(1)

Remote I/O Adapter for 1395 DC Industrial

Drives

1791-xxx Block I/O Products The adapter is built into the block.

1747-ASB

(1)

SLC 500 Remote I/O Adapter Module -

1794-ASB Flex I/O 24VDC Remote I/O Adapter -

(1) Extended node capability

(2) In adapter mode

(3) Series A, B, and C

(4) Extended node capability for Series B and C

(5) Must be Catalog Number 2706-ExxxxxB1

Publication 1747-UM013B-EN-P - January 2005

Chapter

Quick Start for Experienced Users

This chapter helps you to get started using the RIO Scanner. We base the procedures here on the assumption that you have a basic understanding of SLC 500 products.

You must:

• understand electronic process control

• be able to interpret the ladder logic instructions for generating

the electronic signals that control your application

Because it is a start-up guide for experienced users, this chapter does not contain detailed explanations about the procedures listed. It does, however, reference other chapters in this book where you can get more detailed information. It also references other documentation that may be helpful if you are unfamiliar with programming techniques or system installation requirements.

Required Tools and Equipment

If you have any questions, or are unfamiliar with the terms used or concepts presented in the procedural steps, always read the referenced chapters and other recommended documentation before trying to apply the information.

This chapter:

• tells you what tools and equipment you need

• lists preliminary considerations

• describes when to address, configure and program the module

• explains how to install and wire the module

• discusses system power-up procedures

Have the following tools and equipment ready:

• medium blade screwdriver

• programming equipment

• termination kit (package of resistors and ring lug included with

the scanner)

• approximately 15 inches of #20 AWG for grounding the drain shield to the SLC chassis (for Series A retrofits)

• an adequate length of RIO communication cable (Belden 9463) for your specific application

1 Publication 1747-UM013B-EN-P - January 2005

2-2 Quick Start for Experienced Users

Procedures

1. Check the contents of the shipping box.

Unpack the module making sure that the contents include:

• RIO Scanner (Catalog Number 1747 SN)

• termination kit

If the contents are incomplete, call your local Allen-Bradley representative for assistance.

2. Ensure you chassis supports placement of the 1747-SN module.

Review the power requirements of your system to see that your chassis supports placement of the scanner module. The scanner consumes 600 mA @ 5VDC.

For modular style systems, calculate the total load on the system power supply using the procedure described in the SLC 500 Modular Hardware Style User Manual, Publication 1747-UM011.

See Chapter 3, Installation and Wiring and Appendix A Specifications in this manual.

3. Configure the module using the DIP switches.

Set the DIP switches (located on the printed circuit board) to the desired baud rate. Note that all RIO devices must be configured for the same baud rate.

Baud Rate DIP Switch Position

Switch 1 Switch 2

57.6K baud on on

115.2K baud on off

230.4K baud off on

230.4K baud off off

See Chapter 3, Installation and Wiring.

4. Insert the 1747-SN module into the chassis.

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