Rockwell Automation 6008-SV2R User Manual

AllenBradley

VMEbus Remote I/O

User

Scanner

(Cat.

No. 6008SV1R,

6008SV2R)

Manual

Important User Information

Because of the variety of uses for the products described in this publication, those responsible for the application and use of this control equipment must satisfy themselves that all necessary steps have been taken to assure that each application and use meets all performance and safety requirements, including any applicable laws, regulations, codes and standards.

The illustrations, charts, sample programs and layout examples shown in this guide are intended solely for purposes of example. Since there are many variables and requirements associated with any particular installation, Allen-Bradley does not assume responsibility or liability (to include intellectual property liability) for actual use based upon the examples shown in this publication.

Allen-Bradley publication SGI-1.1, Safety Guidelines for the Application, Installation, and Maintenance of Solid State Control (available from your local Allen-Bradley office), describes some important differences between solid-state equipment and electromechanical devices that should be taken into consideration when applying products such as those described in this publication.

Reproduction of the contents of this copyrighted publication, in whole or in part, without written permission of Allen-Bradley Company, Inc., is prohibited.

Throughout this manual we use notes to make you aware of safety considerations:

ATTENTION: This notation identifies information about practices or circumstances that can lead to personal injury or death, property damage or economic loss.

Attention statements help you to:

identify a hazard avoid the hazard recognize the consequences

Important: This notation identifies information that is critical for successful application and understanding of the product.

Using This Manual pi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Introduction pi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Audience pi Required Hardware pi Terms

Scanner Overview 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Using This Chapter 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Introduction 11 VMEbus How the Scanner Scans 16 Comparison to 6008SV Scanner 18 Operating Modes 19 VME Master Processor Watchdog Timer 111

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Relationship

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pii

14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Installing the Scanner 21. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Using This Chapter 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Handling the Scanner 21 Setting Switches 21 Removing VME Backplane Jumpers 26 Grounding the VME Chassis 26 Inserting the Scanner 27 Determining PowerSupply Requirements 27 Connecting

Addressing

Using This Chapter 31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

I/O Addressing Concept 31 Choosing an Addressing Mode 33 Addressing BlockTransfer Modules 36 Assigning Racks 37

to the Remote I/O Link

I/O

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28. . . . . . . . . . . . . . . . . . . . . . . .

31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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Communicating with Remote I/O 41. . . . . . . . . . . . . . . . . . . .

Using This Chapter 41. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Selecting Devices that You Can Connect 41 Introduction Designing Specifying a Scan List 45 Processing Processing Block Data 48

to Remote I/O

a Remote I/O Link

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Discrete I/O

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42. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

43. . . . . . . . . . . . . . . . . . . . . . . . . . . .

46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table of Contentsii

Operating

Using This Chapter 51. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Addressing Command Summary 56 SETUP command byte 13 57 description 57 parameters 58 coding sequence 58 AUTOCONFIGURE command byte 10 59 description 59 parameters 510 coding sequence 512 SCAN LIST command byte 11 513 description 513 parameters 513 coding sequence 515 FAULT DEPENDENT GROUP command byte 12 516 description 516 parameters 516 coding sequence 518 SET MODE command byte 20 519 description 519 parameters 519 coding sequence 520 LINK STATUS command byte 21 521 description 521 parameters 522 coding sequence 524 BT READ command byte 01 525 description 525 parameters 526 coding sequence 526 BT WRITE command byte 02 527 description 527 parameters 527 coding sequence 528 RESET 529 description 529 parameters 530 coding sequence 530

in SV

Compatible Mode 51. . . . . . . . . . . . . . . . . . .

Global RAM

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51. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table of Contents iii

Operating

Using This Chapter 61. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Addressing Command Summary 67 SETUP command byte 13 68 description 68 parameters 68 coding sequence 610 AUTOCONFIGURE command byte 10 611 description 611 parameters 612 coding sequence 614 SCAN LIST command byte 11 615 description 615 parameters 615 coding sequence 617 FAULT DEPENDENT GROUP command byte 12 618 description 618 parameters 618 coding sequence 620 SET MODE command byte 20 621 description 621 parameters 621 coding sequence 622 LINK STATUS command byte 21 623 description 623 parameters 624 coding sequence 627 BT READ command byte 01 628 description 628 parameters 630 coding sequence 631 BT WRITE command byte 02 632 description 632 parameters 634 coding sequence 635 CONTINUOUS BT READ command byte 06 636 description 636 parameters 638 coding sequence 639 CONTINUOUS BT WRITE command byte 07 640 description 640 parameters 642 coding sequence 643 RESET 644

in SV

Superset Mode 61. . . . . . . . . . . . . . . . . . . . .

Global RAM

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61. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table of Contentsiv

description 644. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

parameters 645 coding sequence 645

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Starting the Scanner 71. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Using This Chapter 71. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Understanding the Scanner States 71 Powering Up the Scanner 74 After Waking Up the Scanner 78

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Programming the Scanner 81. . . . . . . . . . . . . . . . . . . . . . . . .

Using This Chapter 81. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Using the Semaphore 81 Knowing When a Command Is Complete 82 Programming Examples of Each Scanner Management Command 82 Programming Block Transfers 834 Communicating with PLC5 Processor in Adapter Mode 839

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Troubleshooting 91. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Using This Chapter 91. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Indicators 91 Error Codes 92 Troubleshooting Suggestions 94

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Specifications A1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Environmental Performance VMEbus

Specifications

A1. . . . . . . . . . . . . . . . . . . . . . . . . . .

A1. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Using This Manual

Preface

Introduction

Audience

Required Hardware

This manual describes how to install and use the VMEbus remote I/O scanners (catalog numbers 6008-SV1R and 6008-SV2R).

You should have experience in system development and integration and in writing software for VMEbus master processors. You should also have a working knowledge of the C programming language, including the concepts of structures and pointers. Knowledge of Allen-Bradley 1771 I/O products is helpful but not essential.

You need a VMEbus-compatible VME master processor to set up and control the VMEbus remote I/O scanner. You install the scanner in a standard 6U, full-height VME rack.

The 1771 I/O modules that the scanner monitors and controls depend on your application. You also need an adapter in the 1771 chassis to allow communication between the scanner and the I/O modules. You can use any A-B adapter module or a PLC-5 processor that operates in adapter mode.

pi

Preface

Terms

This table defines common terms:

This term: Refers to the:

scanner

VME master processor main CPU of your VME system

VME chassis frame that VME cards are mounted in

VMEbus circuit board or backplane mounted in the chassis that the scanner, the

I/O chassis AllenBradley 1771 series I/O chassis

input image table area of global memory in the scanner that contains the data from the

output image table area of global memory in the scanner that contains output data for

block transfer transfer of data between an intelligent I/O module and a scanner

general data area designated area of global VME memory, existing within the scanner,

global RAM an area of global VME memory in the scanner that can be accessed

semaphore bit bit that indicates whether part of the global RAM (the general data

scan list list that the scanner maintains internally to determine the I/O racks that

both remote scanners (catalog numbers 6008SV1R and 6008SV2R)

The VME master processor runs the application program that accesses the scanner. A VME system can have more than one VME master processor, each assigned different duties and both accessing the same scanner(s).

Both the scanner and the VME master processor are mounted in the chassis along with other VME hardware.

VME master processor, and other VME cards plug into

This is the frame that houses the I/O modules, power supply, and adapter or PLC processor.

input terminals of input modules

When an input switch is closed its corresponding input bit in the image table is set to 1.

terminals of output modules

When a bit is set to 1, the corresponding output turns on.

A block transfer sends as many as 64 words of data at a time.

that is used to pass information between the scanner and a VME master processor.

Scanner commands are processed in this data area.

by both the scanner and the VME master processor(s).

This area of memory is the key means for communication between the scanner and the VME master

area) is being used.

Typically this bit is used to prevent multiple masters or the scanner from writing to the general data area simultaneously.

it is to scan, and the order in which it is to scan them.

You create the scan list using the AUTOCONFIGURE command or the SCAN LIST command.

pii

Scanner Overview

Chapter

Using This Chapter

Introduction

This chapter provides an overview of the scanner. This chapter describes how the scanner relates to the VMEbus and to the remote I/O link.

If you want to read about: go to page:

introduction VMEbus relationship 14 how the scanner scans 16 operating modes 19 VME master processor watchdog timer 111

The VMEbus scanners (catalog number 6008-SV1R and 6008-SV2R) monitor and control remote Allen-Bradley I/O modules without using a PLC processor. Use your VME master processor(s) to manage as many as 32 racks of remote A-B I/O (16 per scanner channel).

The scanner communicates with I/O adapters that reside in the left slot of a remote chassis and with other products that have node adapters built into them. The scanner transfers the information necessary to control discrete and block-transfer data to and from the VMEbus.

The VMEbus scanner physically resides in the VME chassis. The scanner occupies one 6U (full-height) VME slot. The scanner uses the P1 connector to interface to the VMEbus. You can use more than one scanner in your VME system to create large and flexible I/O subsystems.

11

To the VMEbus, the scanner is a memory-mapped slave that responds to 8-bit or 16-bit accesses in either A16 or A24 address space. The scanner can act as a VME interrupter on any of the seven VMEbus interrupt lines.

The SV1R and SV2R scanners replace the Allen-Bradley 6008-SV scanner. The SV1R has one remote I/O channel; the SV2R has two remote I/O channels. The SV1R and SV2R scanners have an extra embedded communication microprocessor, which gives them more flexibility and faster performance than the 6008-SV scanner. The new scanners are backward-compatible with the 6008-SV scanner and offer:

continuous block-transfer operations each remote I/O channel supports as many as 16 racks of remote I/O configurable scan rate at 57.6, 115.2, or 230.4 kbps

VME interrupt signals change in the scanner input table

11

Chapter

Scanner Overview

Figure 1.1

connection overview

System

HP 9000 computer

VAX computer

Ethernet network

Vision

VME CPU

PanelView

PLC5 processor

Ethernet

Data

remote I/O channel B

6008SV2R

VME chassis

remote I/O channel A

1336 drive

Flex I/O

Note: The 6008SV1R scanner is interchangeable with the 6008SV2R scanner, except that the SV1R scanner supports only one channel of remote I/O.

12

chassis with 1771ASB

Chapter

Scanner Overview

Each scanner channel supports as many as 32 physical adapters (16 logical racks). Figure 1.2 shows the front panels of the scanners.

6008SV2R

PWR

BPLN COM

FLT

Indicators:

power (green)

VMEbus backplane communication (green)

fault (red)

Indicators:

channel status (green/red)

Channels:

remote I/O channel A communication port (factory enabled)

Figure 1.2 Scanner

front panel

6008SV1R

PWR

BPLN COM

FLT

Table 1.A Significance of scanner indicators

When this indicator:

PWR

(power) green LED

BPLN COM

(backplane communication) green LED

FLT

(fault) red LED

is: it means:

illuminated power is applied to the

module

illuminated for approximately a half second

illuminated the scanner board is reset,

a VMEbus access is made to the scanner board

performing a self test, or a fault has been detected

Table 1.B Significance

of channel status

indicators

When the status indicator is:

off

green is on line, in Run mode, and

the scanner:

is off line

scanning the racks in the scan list

remote I/O channel B communication port (factory disabled)

blinking green is on line, in Run mode, and

scanning only some of the racks in the scan list

red has an unrecoverable fault

blinking red has a recoverable fault

13

Chapter

Scanner Overview

VMEbus Relationship

The scanner complies with the VMEbus specification (revision C.1) and responds to VME masters on the VMEbus. The scanner appears as an area of global VME RAM to other master processors on the VMEbus. This area contains the I/O image area, control/status area, general data area, and interrupt ID area.

memory map for one channel

SVcompatible mode SVsuperset mode

output image table

64 words

input image table

64 words

control/status area

16 words

general data area

1872 words

output image table

128 words

input image table

128 words

control/status area

16 words

general data area

112 words

interrupt/VME ID area

32 words

continuous BT write

16 entries (72 words each)

continuous BT read

32 entries (72 words each)

interrupt/VME ID area

32 words

For more details on these memory areas, see chapter 5 or 6 for SV-compatible mode or SV-superset mode, respectively.

There is no direct communication between a VME master processor and the discrete I/O, rather the VME master processor communicates with the I/O image table in the scanner (shown above). The VME master processor reads the status of inputs from the input image table and controls the outputs by writing data to the output image table.

14

Chapter

Scanner Overview

These VMEbus transfers are asynchronous to the scanner’s I/O update. This means there is no way to know exactly when the data being put in the output image table will be sent to the appropriate I/O rack. Data is sent to an adapter only when that adapter is being scanned. Best-case timing is if the data is placed in the output image table just before the specified adapter is scanned; worst-case timing is if the data is placed in the output image table just after the specified adapter was scanned. In the worst-case scenario, the data does not reach the specified I/O rack until the next time that adapter is scanned.

How the Scanner Responds to VME Signals

The scanner can generate interrupts on any of seven request levels (IRQ1-IRQ7). When a VMEbus master acknowledges the interrupt, the scanner replies with a vector (status/id) using the odd 8 bits of the data bus.

Important: The VME master processor might “crash” if there is no software routine written to process an interrupt from the scanner. Or, you can use the SETUP command to configure the scanner so that it never generates interrupts, in case no interrupt software routine has been written. If the scanner does not generate interrupts, the application program must “poll” the scanner to see when commands have been processed.

The scanner responds to Data Transfer Bus (DTB) cycles initiated by masters that transfer data 16 bits at a time or 8 bits transferred in an even and odd format (D16, D08EO). The scanner works in the 16-bit (short) addressing mode or the 24-bit (standard) addressing mode.

The scanner responds to common VME signals as follows:

This VME signal:

SYSFAIL

ACFAIL When the scanner recognizes an ACFAIL signal, it shuts itself down because this

SYSRESET If SYSRESET is asserted on the VMEbus, the scanner resets itself and goes

means:

When the scanner recognizes a SYSFAIL signal, it can either ignore the signal or shut itself down, depending on how the scanner is configured. When the scanner shuts down, the I/O serviced by the adapter either resets to a default condition or holds all of its current values, as determined by switches on the I/O chassis backplane. When the scanner is faulted or shut down, it asserts SYSFAIL on the VMEbus.

means that power will soon be gone. When the scanner shuts down, the I/O serviced by the adapter either resets to a default condition or holds all of its current values as determined by switches on the I/O chassis backplane.

through its initialization tests. The scanner does not clear (reset to 0) the input and output image tables. After a SYSRESET signal, you have to wake up the scanner, the same as a powerup situation.

15

Chapter

Scanner Overview

For more information, see the VMEbus specification (revision C.1) published by VITA (VMEbus International Trade Association), 10229 N. Scottsdale Rd., Suite B, Scottsdale, AZ, 85253, (602) 951-8866. Contact a VITA representative for a copy.

VMEbus Address Modifier Codes

The scanner can respond to the following VMEbus address modifier codes, depending on how you configure the scanner’s address space and response to VME accesses.

How

the Scanner Scans

This code (hex):

39 standard (A24) nonprivileged access

2D short (A16) supervisory access

29 short (A16) nonprivileged access

means:

standard (A24) supervisory access

The scanner runs asynchronously to other VME master processors. Once in Run mode, the scanner continuously scans all the adapters in its scan list. The scan list identifies which adapters to scan and in what order to scan them. An adapter can appear several times in the scan list. For more information about using the scan list, see chapter 4.

When the scanner scans an adapter, it brings in digital input data and places the data in the scanner’s input image table. At the same time, the scanner sends digital output data to the adapter.

16

VME system with scanner (scanner using only 1 channel)

Chapter

Scanner Overview

remote I/O system

adapter 1

example scan list:

adapter 1 adapter 2 adapter 1 adapter 3

➂ scan adapter 1

scan

list: adapter 1 adapter 2 adapter 1 adapter 3

➃ scan adapter 3

remote I/O channel A

remote I/O channel B (6008SV2R only)

➄ if the VME master

processor sent a command, execute the command and then return to processing the scan list

if there is no command, continue processing the scan list

adapter 2

adapter 3

command processing

➁ scan adapter 2

scanner

➀ scan adapter 1

adapter scan

output data

status and input data

scanning the adapters in the scan list

17

Chapter

Scanner Overview

Getting the Scanner's Attention

For a VME master processor to get the scanner’s attention, it must write a value (any value) to any byte in the scanner’s identification area. This area is located in the last 64 bytes of the global RAM for each scanner channel.

The scanner gets the attention of a VME master processor by generating a VMEbus interrupt to which the VME master processor must respond. This interrupt is sent when the scanner finishes commands that a VME master processor initiated.

Comparison to 6008SV Scanner

The 6008-SV1R and 6008-SV2R scanners replace and are backward compatible with the Allen-Bradley 6008-SV VMEbus remote I/O scanner. The 6008-SV1R and 6008-SV2R scanners offers these improvements:

each remote I/O channel controls as many as 32 adapters configurable communication rate of 230.4, 115.2, or 57.6 kbps lets you

select I/O scan time embedded communication microprocessor increases

scanner performance VME interrupt signals change in the scanner input table configurable VME operating mode lets you select the scanner features

you need for your application

Important: The SCAN LIST command is the only difference between the 6008-SV1R and 6008-SV2R scanners and the 6008-SV scanner. If you use that command, you must modify the command to specify the rack size.

The 6008-SV1R and 6008-SV2R also offer improved block transfer operations. In addition to single block transfer operations, the 6008-SV1R and 6008-SV2R support continuous block transfer operations. A single block transfer is a single read or write transfer to a specific intelligent I/O module. If your application needs to continuously poll a module to receive up-to-date data, use a continuous block transfer request. The continuous block transfer requests uses less programming overhead than programming a single block transfer request each time you need the data.

18

Chapter

Scanner Overview

Operating

Modes

Before you begin using the scanner, you have several choices to make concerning how the scanner operates. You need to specify how the scanner operates in the VME system and how you want to program the scanner.

Selecting VME Operating Mode

The scanner offers two VME operating modes. The mode you select determines the command set available to the scanner and the memory structure the scanner uses. You set a switch on the scanner to specify the operating mode you want.

If you want: select this VME

the scanner to operate exactly as the 6008SV scanner

This mode is compatible with the 6008SV so you can run previouslydeveloped applications with minor modifications. Select this mode if you are replacing a 6008SV with a 6008SV2R and do not want to modify your application.

In any application that uses the SCAN LIST command with the 6008SV scanner, you must modify the command to specify the rack size.

For more information see chapter 5. the scanner to use the new commands and additional memory, as

compared to the SVcompatible mode

This mode provides additional features, as compared to the 6008SV.

For more information, see chapter 6.

operating mode:

SVcompatible

SVsuperset

Important: An application developed for one operating mode will not work in another operating mode.

19

Chapter

Scanner Overview

Selecting a Programming Mode

Select the appropriate programming mode for programming the scanner.

Table 1.C Programming

modes

If you want these conditions: select this

• the scanner doesn't send output information to the adapters

• all module outputs are reset (off); outputs are disabled, so they

remain reset

• discrete input information is updated

• the scanner doesn't send blocktransfer requests to the adapters,

but the scanner will queue the requests from the VME master processor

• the scanner sends output information to the adapters

• all module outputs are held reset (off) outputs are disabled, so they

remain reset

• discrete input information is updated

• the scanner sends blocktransfer requests to the adapters, but

actual outputs are disabled (reset)

• the scanner sends output information to the adapters

• input information is updated

• the scanner sends blocktransfer requests to the adapters

• all outputs are allowed to energize

programming mode:

Program

Test

Run

When your application program first starts the scanner with the SETUP command, the scanner is in the Program mode. Your program must issue a SET MODE command to change the scanner to Run mode.

110

Chapter

Scanner Overview

VME

Master Processor

Watchdog Timer

The VME master processor must issue a valid command to the scanner at least once in a user-specified time period (the default is 500 msec). If the scanner fails to see a valid command from a VME master processor in this time period (as counted by the watchdog timer), the scanner resets itself and repeats its startup initialization sequence. This causes the I/O racks on the link to fault within 100 msec and the I/O all turn off or remain in their last state, depending on the switch setting on the I/O chassis.

You can disable the watchdog timer or change its timeout period with the SETUP command.

To keep the watchdog from shutting down the scanner, periodically issue a LINK STATUS command. This command provides the application program with important diagnostic information about the status of the I/O link and, at the same time, causes the least amount of overhead for the scanner to complete the command.

To debug your application program you can select debug mode and disable the watchdog timer using the SETUP command.

ATTENTION: Unwanted machine action can result from disabling the VME master processor watchdog. When the VME master processor watchdog is disabled, the scanner has no way of knowing that communication has been lost with your VME master processor and will continue to send data from the output image table to the output modules.

111

Installing the Scanner

Chapter

Using This Chapter

Handling the Scanner

This chapter explains how to install the scanner and connect it to a remote I/O link. For information about programming and using the scanner, use the flow chart preceding each chapter to determine where to find the information you need.

If you want to read about: go to page:

handling the scanner setting switches 21 removing VME backplane jumpers 26 grounding the VME chassis 26 inserting the scanner 27 determining power requirements 27 connecting to the remote I/O link 28

The scanner is shipped in a static-shielded bag to guard against electrostatic damage. Electrostatic discharge can damage integrated circuits or semiconductors in the scanner. Avoid electrostatic damage by observing these precautions.

Remain in contact with an approved ground point while handling the

scanner (by wearing a properly grounded wrist strap).

21

Wrist strap

Setting Switches

Do not touch the backplane connector or connector pins.

When not in use, keep the scanner in its static-shielded bag.

The scanner has several on-board switches you set to configure:

address space VME operating mode VME address space scanner responses to VME accesses

21

Chapter

Installing the Scanner

Determine the VMEbus A24/A16 Address Space

Use this diagram and the example to set SW1 and SW2 for the correct VMEbus address space.

12345678

slide switch pushed up on = closed = 0

slide switch pushed down off = open = 1

SW2

SW1

Important: These pins are for manufacturing use only

- do not jumper these pins.

A23 A22 A21 A20 A19 A18 A17 A16

SW2

12345678

reserved

A15 A14 A13 A12

SW1

12345678

22

In this VME operating mode:

SVcompatible

SVsuperset A23 through A13 1 channel active

If there are switches not accounted for in a particular address space, such as the switches for A16A23 for SVcompatible, A16 address space, the switch position does not affect scanner operation.

these bits: are valid for this

A23 through A12 1 channel active A23 through A13 2 channels active

A15 through A12 1 channel active A15 through A13 2 channels active

A23 through A14 2 channels active

address space:

A24

A16

A24

Chapter

Installing the Scanner

Determine the Operating Mode, Address Space, Scanner Response, and Rack Configuration

Use this diagram and Table 2.A on page 2-4 to set SW3.

SW3

Important: These pins are for manufacturing use only

- do not jumper these pins.

12345678

slide switch pushed up on = closed = 0

slide switch pushed down off = open = 1

SW3

12345678

23

Chapter

Installing the Scanner

This switch: configures: with these options:

Table 2.A

settings for SW3

Switch

switch 1, 2, 3

switch 4, 5 VME operating mode switch 4 switch 5

switch 6 VME address space on A16

switch 7 how the scanner responds to

switch 8 which channels are active on only channel A is active

not used set to off

on on SV compatible on off SV superset off off reserved off on reserved

off A24 Select A24 if you select SVsuperset as the VME operating mode.

on responds to nonprivileged and supervisory VME accesses

VME accesses

off responds to supervisory VME accesses

off both channel A and B are active

this switch is ignored if you are configuring the 6008SV1R

(2D, 3D, 29, and 39 address modifiers)

(29 and 39 address modifiers)

24

For example:

12345678

SW3

SW2

Chapter

Installing the Scanner

These switch settings specify:

• SVcompatible mode

• A24 address space

• response to both nonprivileged and supervisory access

• only channel A is active

Switch

These switch settings specify VME address 562,000.

SW1

12345678

Specifying VME addresses

You specify the first digit (for A16) or first 3 digits (for A24) of the address space; the remaining digits are always 0. The switches are set from left to right. For example, to set the address space at 562,000 (hex) in A24 with one channel active, set the bits as:

VME address space of 562,000 (hex) A24 address mode with 1 channel active

SW1SW2

A23 A22 A21 A20 A19 A18 A17 A16 A15 A14 A13 A12

Setting

010101100010 (on) (off) (on) (off) (on) (off) (off) (on) (on) (on) (off) (on)

562

The last three digits in 562,000 (hex) address are already determined by the scanner, so there are no switches to set.

25

Chapter

Installing the Scanner

Removing

VME

Backplane Jumpers

one empty slot (jumpers are installed)

The VMEbus has several daisy-chained control signals. Almost all VMEbus backplanes contain jumpers for these control signals to allow systems to operate with empty slots. There are five jumpers per VME slot, one for each of the four bus-grant arbitration levels and one for the interrupt-acknowledge daisy chain.

Depending on the backplane manufacturer, the jumpers can be on the rear pins of the J1 connector or alongside it on the front of the backplane. The scanner uses 1 slot of the VME backplane. Remove these jumpers from the slot where you plan to insert the scanner.

remove all the backplane jumpers in the slot where you insert the scanner

backplane

Grounding the VME Chassis

other VME module

scanner

CPU

Allen-Bradley makes specific recommendations for properly grounding its racks so that their operation is as safe and error-free as possible. VME systems, on the other hand, may have no formal specifications for grounding the VME chassis frame. Allen-Bradley recommends that you ground the VME chassis frame and that you connect the logic ground (common) of the VME power supply to the chassis frame’s earth ground.

The specific procedure for grounding a VME chassis varies depending on the style of the chassis. Read the Programmable Controller Wiring and Grounding Guidelines, publication 1770-4.1, for information on how Allen-Bradley racks are grounded, and try to ground your VME chassis frame in a similar way.

26

Chapter

Installing the Scanner

Inserting the Scanner

Insert the scanner in one slot in a 6U (full-height) VMEbus chassis.

ATTENTION: Make sure that your VME system is powered off. The scanner is not designed to be inserted or removed from a live system.

ATTENTION: Avoid touching the circuit board and connectors. You might damage the board, or electrostatic discharge might damage the board.

Use the VME chassis card guides to slide the scanner into the chassis. Use firm pressure on the top and bottom handles of the scanner to make its P1 connector fit firmly into the connector on the backplane. Tighten the screws on the top and bottom of the front panel to prevent the scanner from loosening.

Determining PowerSupply Requirements

The scanner operates on 5V dc @ 2.3A (typical), 2.5A (maximum).

27

Chapter

Installing the Scanner

Connecting to the Remote I/O Link

Each scanner channel supports as many as 32 physical adapters. Use 1770-CD (or Belden 9463) cable. Connect a remote I/O network using a daisy-chain or trunkline/dropline configuration.

Table 2.B

number of devices the scanner supports

Total

In this mode: the maximum number

SVcompatible

SVsuperset 16 32

of logical racks per channel is:

8 16

and the maximum number of physical adapters per channel is:

Important: The maximum cable length for remote I/O depends on the transmission rate. Configure all devices on a remote I/O link to communicate at the same transmission rate.

Table 2.C

the correct cable length based on the link'

Choose

A remote I/O link using this communication rate:

57.6 kbps

115.2 kbps 1,524 m (5,000 ft)

230.4 kbps 762 m (2,500 ft)

cannot exceed this cable length:

3,048 m (10,000 ft)

s communication rate

For proper operation, terminate both ends of a remote I/O link by using external resistors. See Table 2.D for information on whether to use a 150W or 82W terminator.

28

Chapter

Installing the Scanner

Table 2.D Terminating

If your remote I/O link:

operates at 230.4 K bit/s

operates at 57.6 or 115.2 K bit/s, and no devices listed below are linked

Scanners 1771SN; 1772SD, SD2;

1775SR, S4A, S4B; 6008SQH1, SQH2

Adapters 1771AS; 1771ASB (series A only); 1771DCM

Miscellaneous 1771AF

connects to any device listed below:

Scanners 1771SN; 1772SD, SD2;

1775SR, S4A, S4B; 6008SQH1, SQH2

Adapters 1771AS; 1771ASB (series A only); 1771DCM

Miscellaneous 1771AF

operates at 57.6 or 115.2 K bit/s, and you do not require over 16 physical devices

the remote I/O link

You can connect a remote I/O link in one of two ways:

trunkline/dropline—from the drop line to the connector screw terminals

on the remote I/O connectors of the scanner

usethis

his

use t resistor rating:

82W

150W

the maximum number of

physical devices that you can connect on the link is:

32 16

16 16

racks that you can scan on the link is:

daisy chain—to the connector screw terminals on the remote I/O

connectors of the scanner and then to the remote I/O connector screw terminals of the next remote I/O device

Important: The cable connections for the 6008-SV1R and 6008-SV2R scanner are opposite from those for the earlier 6008-SV scanner. Make sure you follow the instructions in Figure 2.1 below.

29

Chapter

Installing the Scanner

Figure 2.1

remote I/O connections

Make

To connect the remote I/O cable, do the following:

1. Run the cable (1770CD) from the processor to each

remote I/O adapter in the remote I/O system.

2. Connect the signal conductor with blue insulation to the

3pin connector terminal labeled 1 on the scanner and to each remote I/O adapter in the remote I/O system.

3. Connect the signal conductor with clear insulation to the

3pin connector terminal labeled 2.

4. Connect the shield drain wire to the middle 3pin

terminal (it is not labeled).

5. Tie wrap the remote I/O network cable to the chassis to

relieve strain on the cable.

6. Terminate the remote I/O link by connecting an external

terminator resistor between the remote I/O terminals labeled 1 and 2.

Important:

Last device on the remote I/O link. Terminate both ends of a remote I/O link.

To another remote I/O device

Blue

Shield

Clear

1770CD

(Belden 9463)

82Ω or 150Ω

resistor

210

Addressing I/O

Chapter

Using This Chapter

I/O Addressing Concept

Classification: Term: Relation to memory:

A specific terminal on an I/O module

I/O terminals that when combined occupy 1 word in the input image table and 1 word in the output image table

Combinations of bits or I/O groups I/O rack 128 input bits and 128 output bits

This chapter provides an overview of I/O addressing. This chapter also explains the basics of how the scanner processes discrete I/O and block-transfer data.

If you want to read about: go to page:

I/O addressing concept

choosing an addressing mode 33

addressing blocktransfer modules 36

assigning racks 37

Each terminal on an input or output module that can be wired to a field device occupies a bit within the scanner’s input image table or output image table.

I/O addressing maps the physical location of an I/O module terminal to a bit location in the processor memory. I/O addressing is just a way to segment memory:

terminal or point

I/O group 16 input bits = 1 word in the input image table

The density of an I/O module, i.e., 8point, 16point, 32point, directly relates to the amount of memory (bits) the module occupies in memory. For example, a 16point input module occupies 16 bits in the input image table.

16 output bits = 1 word in the output image table

8 input words and 8 output words

8 I/O groups

31

Figure 3.1 shows the relationship between an I/O terminal and its location in scanner memory.

31

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