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

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.

IMPORTANT

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

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

• recognize the consequence

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.
					Labels may be located on or inside the equipment (e.g.,
BURN HAZARD
					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	page 5-5
BTW)
removed Chapter 7	application examples can be found in
	Chapter 4 and Chapter 5
configuring G files using RSLogix 500	page B-9
block transfer examples for earlier	Appendix D
processors

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	Table of Contents
	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	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

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	When Changing From Run Mode . . . . . . . . . . . . . . . . .	3-8
	Status LEDs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3-9
	Chapter 4
Scanner Configuration and	Understanding Remote Input and Output Image Files. . . . .	4-1
Programming	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
	Chapter 5
RIO Block Transfer	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	Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6-1

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	Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6-2
	Retry Counters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6-2
	Block Transfers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6-2
	Appendix A
Specifications	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 and G Files	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
	Appendix C
RIO Configuration Worksheet	Directions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	C-1

Appendix D

Block Transfer Examples for Earlier Processors

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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	Directional Non-Continuous Block Transfer Example .	D-12
	Bidirectional Continuous Block Transfer Example . . . .	D-16
	Bidirectional Alternating Block Transfer . . . . . . . . . . .	D-21
Glossary	Bidirectional Alternating Repeating Block Transfer . . .	D-27
Index	Rockwell Automation Support . . . . . . . . . . . . . . . . . . . . . .	1-7
	Installation Assistance . . . . . . . . . . . . . . . . . . . . . . . . .	1-7
	New Product Satisfaction Return . . . . . . . . . . . . . . . . . .	1-7

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Chapter 1

Overview

System 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

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.

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	RIO Scanner
or Later	(Master of the
Processor	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	1747-ASB Module
	a maximum of 3,048 meters (10,000	(Adapter/Slave)
	feet).
	Local SLC Chassis
	Remote Chassis

Remote Expansion Chassis

Dataliner Message Display	PanelView Operator Terminal	RediPANEL
(Adapter/Slave)	(Adapter/Slave)	(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.

SLC 5/02	RIO
or Later	Scanner
Processor

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 1

Adapter 2

Adapter 3

Adapter 4

Adapter 5

Adapter 6

Half Logical	Quarter Logical	Half	Three-Quarter	Full	Full
Rack	Rack	Logical Rack	Logical Rack	Logical Rack	Logical Rack
Device	Device	Device	Device	Device	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

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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		Logical Rack 1
(Scanner Image)
					Logical Group 0
		Logical Rack 2			Logical Group 7
Processor I/O Image					Scanner I/O Image		Adapter
							Image

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1-4 Overview

How the Scanner Scans

Remote I/O

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.

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	Output	Input
	Input
		Device 3	Device 1
	Image File
	Input		Output
	Device 3
			Device 1
		Output	Input
		Device 2	Device 2

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.

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Overview 1-5

The figure below illustrates the asynchronous operation of the SLC processor and RIO scanner.

SLC Processor Scan Cycle

The SLC processor reads the

scanner input image file into the

SLC input image file, processes Program it, and creates an SLC output

image file. The SLC processor transfers its output file to the scanner..

SLC Processor

					RIO Scanner Scan Cycle
			Scanner	Output	Input
				Image	Image
SLC Input			Input
				Device 3	Device 1
Image File			Image File
						The scanner updates its
			Input		Output	input image file each time
						it scans a logical device.
			Image		Image	The scanner may scan all
			Device 3		Device 1	of its configured logical
						devices several times
				Output	Input	before the SLC processor
						reads the scanner's input
				Image	Image
						image file.
				Device 2	Device 2
			Scanner Output
SLC Output
			Image File
Image File

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

How the Scanner Interacts with Adapters

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

Processor Scanner

RIO Discrete

Transfers

with Adapter 1

SLC Local Chassis

RIO Discrete

Transfers

with Adapter 2

PanelView Operator

Terminal

RIO Discrete

Transfers

with Adapter 3

RIO Discrete

Transfers

with Adapter 4

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.

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

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Overview 1-7

RIO

Logical

Rack 0

RIO

Logical

Rack 1

RIO

Logical

Rack 2

RIO

Logical

Rack 3

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

Bit Number (decimal)

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

0

Rack 0 Group 0

Word 0

Quarter Logical

Rack 0 Group 1

Word 1

Rack

Rack 0 Group 2

Word 2

Rack 0 Group 3

Word 3

Not Used In This

Rack 0 Group 4

Word 4

Rack 0 Group 5

Word 5

Example

Rack 0 Group 6

Word 6

Rack 0 Group 7

Word 7

Rack 1 Group 0

Word 8

Half Logical

Rack 1 Group 1

Word 9

Rack 1 Group 2

Word 10

Rack

Rack 1 Group 3

Word 11

Rack 1 Group 4

Word 12

Not Used In This

Rack 1 Group 5

Word 13

Example

Rack 1 Group 6

Word 14

Rack 1 Group 7

Word 15

Rack 2 Group 0

Word 16

Rack 2 Group 1

Word 17

Three-Quarter

Rack 2 Group 2

Word 18

Logical Rack

Rack 2 Group 3

Word 19

Rack 2 Group 4

Word 20

Rack 2 Group 5

Word 21

Not Used In This

Rack 2 Group 6

Word 22

Rack 2 Group 7

Word 23

Example

Rack 3 Group 0

Word 24

Rack 3 Group 1

Word 25

Rack 3 Group 2

Word 26

Full

Rack 3 Group 3

Word 27

Logical

Rack 3 Group 4

Word 28

Rack

Rack 3 Group 5

Word 29

Rack 3 Group 6

Word 30

Rack 3 Group 7

Word 31

Bit Number (octal)

17 8

16 8

15 8

14 8

13 8

12 8

11 8

10 8

78

68

58

48

38

28

18

08

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

Device 1	Device 2	Device 3	Device 4
Full Logical Rack	Three-Quarter Logical	Half Logical Rack	Quarter Logical Rack
Device	Rack Device	Device	Device
Begins at Logical	Begins at Logical	Begins at Logical	Begins at Logical
Rack 0, Group 0.	Rack 1, Group 0.	Rack 2, Group 0.	Rack 2, Group 4.

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

RIO

Logical

Rack 0

RIO

Logical

Rack 1

RIO

Logical

Rack 2

RIO

Logical

Rack 3

Bit Number

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

0

Rack 0 Group 0

Word 0

Rack 0 Group 1

Word 1

Rack 0 Group 2

Word 2

Rack 0 Group 3

Word 3

Rack 0 Group 4

Word 4

Rack 0 Group 5

Word 5

Rack 0 Group 6

Word 6

Rack 0 Group 7

Word 7

Rack 1 Group 0

Word 8

Rack 1 Group 1

Word 9

Rack 1 Group 2

Word 10

Rack 1 Group 3

Word 11

Rack 1 Group 4

Word 12

Rack 1 Group 5

Word 13

Rack 1 Group 6

Word 14

Rack 1 Group 7

Word 15

Rack 2 Group 0

Word 16

Rack 2 Group 1

Word 17

Rack 2 Group 2

Word 18

Rack 2 Group 3

Word 19

Rack 2 Group 4

Word 20

Rack 2 Group 5

Word 21

Rack 2 Group 6

Word 22

Rack 2 Group 7

Word 23

Rack 3 Group 0

Word 24

Rack 3 Group 1

Word 25

Rack 3 Group 2

Word 26

Rack 3 Group 3

Word 27

Rack 3 Group 4

Word 28

Rack 3 Group 5

Word 29

Rack 3 Group 6

Word 30

Rack 3 Group 7

Word 31

Bit Number (octal)

17 8

16 8

15 8

14 8

13 8

12 8

11 8

10 8

78

68

58

48

38

28

18

08

InputFile

Address

	I:e.0
	I:e.1
	I:e.2
	I:e.3				Device1
	I:e.4
	I:e.5
	I:e.6
	I:e.7
	I:e.8
	I:e.9
	I:e.10				Device 2
	I:e.11
	I:e.12
	I:e.13
	I:e.14				Not Used
	I:e.15
	I:e.16				Device 3
	I:e.17
	I:e.18
	I:e.19
	I:e.20				Device 4
	I:e.21
	I:e.22
	I:e.23
	I:e.24
	I:e.25
	I:e.26				Not Used
	I:e.27
	I:e.28
	I:e.29
	I:e.30
	I:e.31

e = slot number of the SLC chassis containing the scanner

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

Publication 1747-UM013B-EN-P - January 2005

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	Complementary Chassis Logical Rack Number
	Rack Number
		Decimal	Octal
	0	8	10
	1	9	11
	2	10	12
	3	11	13

Publication 1747-UM013B-EN-P - January 2005

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.

Publication 1747-UM013B-EN-P - January 2005

1-12 Overview

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 1

I		I	O	O	I		O	O	O	BT	I	BT		O
											8
8		8	8	8	16		16	8	8		O			8
											8
								1	1
	0			1		2			3		4		5
					E		E			E		E		E
O		O	I	I	M		M	O	O	M	O	M		M
8		8	8	8	P		P	8	8	P	8	P		P
					T		T			T		T		T
					Y		Y	1	1	Y	2	Y		Y
										2		2		2

Example 2

I	O	I	O	I	O	I		O	I	O	I	O
16	16	16	16	16	16		16	16	16	16	16	16

0

1

2

3

4

5

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.

Publication 1747-UM013B-EN-P - January 2005

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 1

		I		I		O		O		I		O		O		BT		I		O	O	I
	16		16		16		16		16			16	16				16		16		16	16
													1
0			1		2		3		4			5	6		7		0		1		2	3
																E
																M
		O		O		I		I		O		I		O		P		O		I	I	O
	16		16		16		16		16			16	16			T	16		16		16	16
													1			Y
															2
Example 2
		I		I		I		I		I		I		I		I		I		I	I	I
		16		16		16		16		16		16		16		16		16		16	16	16
0			1		2		3		4			5	6		7		0		1		2	3
		O		O		O		O		O		O		O		O		O		O	O	O
		16		16		16		16		16		16		16		16		16		16	16	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.																			.

Publication 1747-UM013B-EN-P - January 2005

1-14 Overview

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.

Example 1

	I	I	O	O	I	O	O	BT	O	I
							1
	01	23	45	67	01	23	45	67	01	23
								E
								M
	O	O	I	I	O	I	O	P	I	O
								T
								Y
							1	2

Example 2

I	I	I	I	I	I	I	I	I	I

01

23

45

67

01

23

45

67

01

23

O	O	O	O	O	O	O	O	O	O

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.

Publication 1747-UM013B-EN-P - January 2005

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)
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

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.

Publication 1747-UM013B-EN-P - January 2005

1-16 Overview

I O I O I O I O O I O I O I O I I = Input Module

O = Output Module

Slot	0				1	2	3	4	5	6	7	8
Slot Pair						1	2		3			4

Slot		0			1	2	3	4	5	6	7	8
Slot Pair						1	2		3			4

Primary Chassis		Complementary Chassis
Primary Chassis Configured As:		Complementary Chassis Configured As:
Logical Rack Number	0	Logical Rack Number	8 (decimal)
Logical Group Number	0	Logical Group Number	0
Image Size (logical groups)	16	Image Size (logical groups)	16
Addressing Mode	1/2-slot	Addressing Mode	1/2-slot
Primary/Complementary	Primary	Primary/Complementary	Complementary

Primary Chassis I/O Image										Complementary Chassis I/O Image
	InputImage					Output Image					InputImage					Output Image
from Primary Chassis					from Primary Chassis					from Complementary Chassis					from Complementary Chassis
17	10	7	0	Octal	17	10	7	0	Octal	17	10	7	0	Octal	17	10	7	0	Octal
15	8	7	0	Decimal	15	8	7	0	Decimal	15	8	7	0	Decimal	15	8	7	0	Decimal

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

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

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

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

= unused image space

Scanner's I/O Image

Input Image

Output Image

Both images are overlapped in the

17

10

7

0

Octal

17

10

7

0

Octal

15

8

7

0

Decimal

15

8

7

0

Decimal

scanner. The overlapped image

Group 0

Slot 1

Slot 1

Slot 1

Slot 1

appears where the primary chassis

Group 1

Slot 1

Slot 1

1

Slot 1

Slot 1

1

image is configured to reside.

Logical

Group 2

Slot 2

Slot 2

Slot 2

Slot 2

Group 3

Slot 2

Slot 2

Slot 2

Slot 2

In this case, the primary chassis

Rack 0

Group 4

Slot 3

Slot 3

Slot 3

Slot 3

image is configured as starting

Group 5

Slot 3

Slot 3

2

Slot 3

Slot 3

2

logical rack 0 and starting logical

Group 6

Slot 4

Slot 4

Slot 4

Slot 4

group 0.

Group 7

Slot 4

Slot 4

Slot Pair

Slot 4

Slot 4

Slot Pair

Group 0

Slot 5

Slot 5

Slot 5

Slot 5

Group 1

Slot 5

Slot 5

3

Slot 5

Slot 5

3

Slot 6

Slot 6

Slot 6

Slot 6

Group 2

Logical

Group 3

Slot 6

Slot 6

Slot 6

Slot 6

Slot 7

Slot 7

Slot 7

Slot 7

Rack 1

Group 4

Group 5

Slot 7

Slot 7

4

Slot 7

Slot 7

4

Slot 8

Slot 8

Slot 8

Slot 8

Group 6

Group 7

Slot 8

Slot 8

Slot 8

Slot 8

Publication 1747-UM013B-EN-P - January 2005

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).

	Word 0				1/2 logical rack		Word 0
	Word 1				configured and		Word 1
	Word 2						Word 2
Logical Word 3					usable	Logical	Word 3
Rack 0	Word 4					Rack 8	Word 4
	Word 5						Word 5
					1/2 logical rack not
	Word 6						Word 6
	Word 7				configured		Word 7

1/2 logical rack

1/2 logical rack configuredguredandandusablea

1/2 logical rack 1/2confilogicalured,rackbut not

configured,usable forbutBTnotsinc

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)

Publication 1747-UM013B-EN-P - January 2005

1-18 Overview

Hardware Features

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

			.NOSERIAL		CAT	500SLC Remote	SCANNER			1
							COMM FAULT
			) FAC		SER	ScannerI/O	SW1
							O	1 2
		CLASS					N
				L			/ 1	2	KBAUD
		CB,A,GROUPSI,	A196.LOC.HAZFOR	U
				.EQCONTINDLISTED..			ON	ON	57.6
							ON	OFF	115.2
						2	OFF	ON	230.4
		D, AND		SA			OFF	OFF	230.4
					CURRENT
		2DIV.	T3CCODE	OPERATING TEMPERATURE)		HOST :.FRN	CONNECT ONE END OF
							CABLE SHIELD TO CHASSIS
							MOUNTING BOLT. REFER T O
					REQUIREMENT:		USER'S MANUAL.
						PLUG :.FRN	LINE 1
							SHIELD
					mA 600		LINE 2
		MAKE
		.A.S.U IN			@5VDC
		B
							1747±SN
O N	7					3
						4
1
2	6	5
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

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

Publication 1747-UM013B-EN-P - January 2005

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(1) (2)	PLC- 5/15 (in adapter mode)	-
1785-LT2(1)(2)	PLC- 5/25 (in adapter mode)	-
1785-LT3(1)(2)	PLC- 5/12 (in adapter mode)	-
1785-L30x(1)(2)	PLC- 5/30 (in adapter mode)	-
1785-L40x(1)(2)	PLC- 5/40 (in adapter mode)	-
1785-L60x(1)(2)	PLC- 5/60 (in adapter mode)	-
1771-ASC	Remote I/O Adapter Module	-
1771-ASB(3) (4)	Remote I/O Adapter Module	-
1771-AM1(1)	1-Slot I/O Chassis W/Integral Power Supply and	-
	Adapter
1771-AM2(1)	2-Slot I/O Chassis W/Integral Power Supply and	-
	Adapter
1784-F30D(1)	Plant Floor Terminal Remote I/O Expansion	-
	Module
1771-RIO	Remote I/O Interface Module	-

Publication 1747-UM013B-EN-P - January 2005

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(1)	Remote I/O Adapter Module	-
1747-DCM(1)	Direct Communication Module	-
2706-xxxx(1)(5)	DL40 Dataliner	-
2705-xxx(1)	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 2

Required Tools and

Equipment

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.

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

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.

Publication 1747-UM013B-EN-P - January 2005