Allen-bradley Flex I-O User Manual

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Allen-Bradley

FLEX I/O PROFIBUS

User

Adapter

(Cat. No. 1794-APB)

Manual

–2

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) describes some important dif

ferences 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 the Allen-Bradley Company 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, the Allen-Bradley Company cannot assume responsibility or liability for actual use based on the examples and diagrams.

No patent liability is assumed by Allen-Bradley Company 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 the Allen-Bradley Company is prohibited.

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

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 the hazard

• recognize the consequences

Important: Identifies information that is especially important for

successful application and understanding of the product.

Microsoft is a registered trademark of the Microsoft Corporation. Windows is a trademark of the Microsoft Corporation. FLEX I/O and PLC-5 are trademarks of the Allen-Bradley Company PROFIBUS is a trademark of the PROFIBUS User Organization

, Inc.

About this User Manual

Preface

Purpose

Vocabulary

this Manual Contains

What

Use this manual to install and configure your FLEX I/O

PROFIBUS Adapter, cat. no. 1794-APB.

In this manual, we refer to:

• the FLEX I/O PROFIBUS adapter module as the “adapter”

• the programmable controller as the “processor”

The following table shows what each chapter of this manual describes:

Chapter Title Describes

Overview of FLEX I/O

and Your PROFIBUS Adapter

How Communication Takes Place and I/O Mapping

Connect the Adapter to the PROFIBUS DP Network

The FLEX I/O system and PROFIBUS adapter.

Backplane communication between the modules and the adapter, and how data is mapped into the image table.

The DP physical layer, how to select the line type you should use and how to connect to and terminate the network.

Configure the Adapter for

5 Troubleshooting

Appendix A Specifications Adapter specifications.

Appendix B Device Data Base File Device Data Base (GSD) File.

Master/Slave Communication

How to configure the adapter for master/slave communication.

How to use the indicators for troubleshooting.

Publication 1794-6.5.6 – April 1996

About this User ManualP –2

Catalog

Related Publications

For additional information on planning and installing your PROFIBUS system using FLEX I/O modules, refer to the following publications:

Catalo Number

1794-APB 24V dc PROFIBUS Adapter Installation Instructions 1794-5.40

1794-TB2 1794-TB3

1794-TBN Terminal Base Unit Installation Instructions 1794-5.16

1794-TBNF Fused Terminal Base Unit Installation Instructions 1794-5.17

1794-PS1 Power Supply Installation Instructions 1794-5.35

1794-IB16 24V dc 16 Input Module Installation Instructions 1794-5.4

1794-OB16 24V dc 16 Output Module Installation Instructions 1794-5.3

1794-IR8 24V dc RTD Analog 8 Input Module Installation Instructions

1794-IT8 24V dc Thermocouple Analog 8 Input

1794-IE8 24V dc Selectable Analog 8 Input

1794-OE4 24V dc Selectable Analog 4 Output

1794-IE4XOE2 24V dc 4 Input/2 Output Analog Combo

1794-IB8S 24V dc Sensor Input Module Installation Instructions 1794-5.7

1794-IA8 120V ac 8 Input Module Installation Instructions 1794-5.9

1794-OA8 120V ac 8 Output Module Installation Instructions 1794-5.10

1794-OW8 24V dc 8 Relay Output Module Installation Instructions 1794-5.19

1794-CE1 Extender Cable Installation Instructions 1794-5.12

1794-NM1 Mounting Kit Installation Instructions 1794-5.13

escription

2-wire Terminal Base 3-wire Terminal Base

Module

Installation Instructions 1794-5.2

Installation Instructions

Related Publications

Pub. Type Pub. Number

1794-5.22

User Manual

1794-6.5.4

1794-5.21

1794-6.5.7

1794-5.6

1794-6.5.2

1794-5.5

1794-6.5.2

1794-5.15

1794-6.5.2

Conventions

Publication 1794-6.5.6 – April 1996

Information...

To order these publications, contact your local Allen-Bradley representative.

This icon appears when more information is available in related documentation.

About this User Manual P –3

Compliance

European Union Directives

If this product has the CE mark it is approved for installation within the European Union and EEA regions. It has been designed and tested to meet the following directives.

EMC Directive

This product is tested to meet Council Directive 89/336/EEC Electromagnetic Compatibility (EMC) and the following standards, in whole or in part, documented in a technical construction file:

• EN 50081-2EMC – Generic Emission Standard, Part 2 –

Industrial Environment

• EN 50082-2EMC – Generic Immunity Standard, Part 2 –

Industrial Environment

This product is intended for use in an industrial environment.

Low V

oltage Directive

This product is tested to meet Council Directive 73/23/EEC Low Voltage, by applying the safety requirements of EN 61131–2 Programmable Controllers, Part 2 – Equipment Requirements and Tests.

For specific information required by EN 61131-2, see the appropriate sections in this publication, as well as the following Allen-Bradley publications:

• Industrial Automation Wiring and Grounding Guidelines For

Noise Immunity, publication 1770-4.1

• Guidelines for Handling Lithium Batteries, publication AG-5.4

• Automation Systems Catalog, publication B111

Publication 1794-6.5.6 – April 1996

About this User ManualP –4

Publication 1794-6.5.6 – April 1996

Overview Y

our PROFIBUS Adapter

of FLEX I/O and

Module

How Communication T Place and I/O Image Table Mapping

akes

Chapter

What

this Chapter Contains

FLEX I/O System

The

and Remove your System Easily

Mount

Optional Accessories 1–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Mounting Kit (1794-NM1) 1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Purpose

PROFIBUS Adapter Components 1–6. . . . . . . . . . . . . . . . . . . . . . . . .

of the 1794-APB FLEX I/O Adapter

Diagnostic Indicators 1–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Network Connector 1–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Setting the Node Address Switches 1–7. . . . . . . . . . . . . . . . . . . . . .

Wiring

Power

Chapter 2

What

this Chapter Contains

Communication

I/O Structure

Polled

Adapter Mapping

1794-IB16

able Mapping

1794-IB16

1794-OB16

able Mapping

1794-OB16

1794-IB8S

able Mapping

1794-IB8S

1794-IA8

able Mapping

1794-IA8

1794-OA8

able Mapping

1794-OA8

1794-OW8

Image T

1794-OW8

1794-IE8

1794-IE8 1794-IE8 1794-IE8

1794-OE4

Over the I/O Backplane

Input Status W

Data into the Image T

– 16-point Discrete Input Module Image

Memory Map

– 16-point Discrete Output Module Image

Memory Map

– 8-point Discrete Sensor Input Module Image

Memory Map

– 8-point Discrete Input Module Image

Memory Map

– 8-point Discrete Output Module Image

Memory Map

– 8-point Discrete Relay Output Module

able Mapping

Memory Map

– 8 Input Analog Module

Memory Map Range Selection Bits W

ord/Bit Descriptions 2–10. . . . . . . . . . . . . . . . . . . . . . .

– 4 Output Analog Module Image T

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

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

able Mapping

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

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

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

1–5. . . . . . . . . . . . . . . . .

1–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

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

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

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

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

2–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–5. . . . . . . . . . . . . . . . . . . . . . . . . . .

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

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

2–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–8. . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–8. . . . . . . . . . . . . . . . . . . . . . . . . . .

2–9. . . . . . . . . . . . . . . . . . . . . .

2–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–10. . . . . . . . . . . . . . . . . . . . . . .

2–11. . . .

Table of Contents–2

Connect the Adapter to the PROFIBUS DP Network

1794-OE4 1794-OE4 1794-OE4

1794-IE4XOE2

1794-IE4XOE2 1794-IE4XOE2 1794-IE4XOE2

1794-IR8

1794-IT8

1794-IT8 1794-IT8 1794-IT8

Chapter

What

this Chapter Contains

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

T-junction Connectors 3–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Termination Blocks 3–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Bus Connector 3–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Cables 3–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

T-junction Connectors 3–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Termination Blocks 3–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Bus Connector 3–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Connect

Terminate

Terminate Terminate

Memory Map Range Selection Bits (W W

ord/Bit Descriptions 2–12. . . . . . . . . . . . . . . . . . . . . .

– Analog Combo Module Image T

Memory Map Range Selection Bits W

ord/Bit Descriptions 2–15. . . . . . . . . . . . . . . . . .

– R

TD Input Analog Module Image T

Read

rite 2–17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ord/Bit Descriptions 2–17. . . . . . . . . . . . . . . . . . . . . .

– Thermocouple Input Module Image T

Read W

rite 2–21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ord/Bit Descriptions 2–21. . . . . . . . . . . . . . . . . . . . . . .

rite W

ord 6) 2–12. . . . . . . . . . .

able Mapping

the Adapter to the Network

to the Adapter

the Network

at the Adapter Using Line A at the Adapter Using Line B

2–12. . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–14. .

2–14. . . . . . . . . . . . . . . . . . . . . . . .

2–15. . . . . . . . . . . . . . . . . . .

2–16. . . .

2–17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–20. .

2–20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

3–4. . . . . . . . . . . . . . . . . . . . . . .

3–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–6. . . . . . . . . . . . . . . . . . . .

Configure the Adapter for Master/Slave Communication

Chapter 4

What

this Chapter Contains

Master/Slave Communication T

How

Entering Send Parameter Data 4–2. . . . . . . . . . . . . . . . . . . . . . . . . . .

Parameter Data

User Entering Read

Check Configuration Data

Configuration Response Data

akes Place 4–1. . . . . . . . . . . . . . .

4–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

4–6. . . . . . . . . . . . . . . . . . . . . . . .

4–9. . . . . . . . . . . . . . . . . . . . . . .

Table of Contents–3

Troubleshooting

Specifications

Device Data Base File

Glossary

Chapter

What

this Chapter Contains Troubleshooting Viewing

Status from the Master’s Configuration Software

with the Indicators

Appendix A

Specifications

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Appendix B

Device

Data Base File

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Glossary

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5–1. . . . . . . . . . . . . . . . . . . . . . . .

5–2. . . . . . . .

A–1

B–1

G–1

Chapter 1

Overview of FLEX I/O and Your PROFIBUS Adapter Module

What

this Chapter Contains

The FLEX I/O System

Adapter

This chapter describes:

• what the FLEX I/O system is and what it contains

• how to mount and remove your system easily

• optional accessories

• mounting dimensions and spacing requirements

• the 1794-APB FLEX I/O PROFIBUS Adapter

• adapter components

• how to connect power wiring

FLEX I/O is a small, modular I/O system for distributed applications that performs all of the functions of rack-based I/O. The FLEX I/O system contains the following components:

Terminal Base

I/O Module

Information...

20125

• PROFIBUS adapter/power supply – powers the internal logic for

as many as eight I/O modules

• terminal base – contains a terminal strip to terminate wiring for

two- or three-wire devices

• I/O module – contains the bus interface and circuitry needed to

perform specific functions related to your application

For information on how communication occurs over the FLEX I/O system backplane, refer to Chapter 2.

Publication 1794-6.5.6 – April 1996

Overview of FLEX I/O and Your PROFIBUS Adapter Module 1–2

Mount and Remove your System Easily

DIN Rail A-B part no. 199-DR1 DIN 46277-3 EN 50022 (35 x 7.5mm)

You can horizontally or vertically mount the FLEX I/O system on a standard DIN rail. The adapter and terminal base easily snap on the DIN rail by hand. Refer to the installation instructions shipped with these components.

Screw holes are also provided to horizontally or vertically panel-mount your system in an enclosure. To panel-mount your FLEX I/O system, use the optional mounting kit (1794-NM1). An example of a DIN rail-mounted system is shown below.

Screw holes are available for panel-mounting.

Components are slotted to accept a DIN rail.

Optional Accessories

Locking tab connector holds terminal base onto DIN rail.

20127

Extender Cables (1794-CE1 or -CE3)

Use the optional 1794-CE1 (0.3m) or -CE3 (0.9m) extender cable (one per system) to arrange your system in two rows or split your system into horizontal and vertical orientation.

1794-CE1 or -CE3 Extender Cable

Publication 1794-6.5.6 – April 1996

20129

Overview of FLEX I/O and Your PROFIBUS Adapter Module 1–3

ATTENTION: This cable can only be used between I/O modules. Do not use between the adapter and I/O

modules. Do not use more than one cable per system.

Mounting Kit (1794-NM1)

Use the optional 1794-NM1 mounting kit to mount your system on a panel or wall without a DIN rail.

1794-NM1 Mounting Kit with 18 screws (2 screws for the adapter and 2 screws for each module)

20129

Publication 1794-6.5.6 – April 1996

Overview of FLEX I/O and Your PROFIBUS Adapter Module 1–4

Mounting Dimensions and Spacing Requirements

.83

(21)

3.2

(80)

3.4

(87)

Allow 1.0 (25.4) air gap on all 4 sides.

1794-ASB

3.4H x 2.7W x 2.7D (87H x 68W x 69D)

Optional

Mounting

Kit

1.4

(35)

2.7

(68)

2.3

(59)

Inches

(Millimeters)

1.4

(35)

3.7

(94)

3.7

(94)

1794-TB2, -TB3

3.7H x 3.7W x 2.7D (94H x 94W x 69D)

0.9

(23)

DIN Rail

0.6 (17.0)

0.3 (8)

2.0

(50)

1.2

(30)

Approximately

11.5 (292.1) from upper

connector

3.7

(94)

3.2

(80)

Publication 1794-6.5.6 – April 1996

Secure DIN Rail every 200mm.

Overview of FLEX I/O and Your PROFIBUS Adapter Module 1–5

Purpose of the 1794-APB FLEX I/O Adapter

= Drop Cable

= Bus Segment

= Termination Block

= T–junction

The 1794-APB is a FLEX I/O adapter that interacts with the FLEX I/O backplane and any PROFIBUS DP master/scanner controller on a PROFIBUS DP network.

The 1794-APB module is a slave device to the DP master/scanner, and is a master controller of the FLEX I/O system where it is installed.

The I/O data exchange occurs as follows: Output data is sent from the DP master/scanner controller across the PROFIBUS DP network to the 1794-APB adapter. The adapter then automatically transfers the data across the FLEX I/O backplane to the output modules. Inputs from the input modules are collected by the FLEX I/O adapter via the backplane and sent across the PROFIBUS DP network to the DP master/scanner controller.

PROFIBUS DP Master/Scanner Controller

RS-232

Personal Computer with Configuration Software

Other DP Adapter/Slave

1794-APB Adapter Slave

FLEX I/O System

Publication 1794-6.5.6 – April 1996

Overview of FLEX I/O and Your PROFIBUS Adapter Module 1–6

PROFIBUS Adapter Components

STATUS indicator (green/red)

PROFIBUS indicator (green/red)

The adapter module consists of the following components:

• two diagnostic indicators

• PROFIBUS DP network connector

• 24V dc power wiring connection terminals

• two node address switches

Flexbus Connector

24V dc wiring Connection Terminals

PROFIBUS DP

Network

Connector

Node Address Switches

Information...

20627

Diagnostic

Indicators

Diagnostic indicators are located on the front panel of the adapter module. They show both normal operation and error conditions in your FLEX I/O system. The indicators are:

• Device status (STATUS)

• Communication link status (PROFIBUS)

Upon power-up, the adapter goes to an initialization state and performs a self-test (memory check, data memory clear, CRC on code). The indicators also go through a self-test sequence. If a failure occurs, the adapter transitions to a faulted state and waits for reset (cycle power). Otherwise, the adapter begins monitoring the network (run state) for messages.

Chapter 5 describes the diagnostic indicators and how to use them for troubleshooting.

Publication 1794-6.5.6 – April 1996

Overview of FLEX I/O and Your PROFIBUS Adapter Module 1–7

Network Connector

Use the 9-pin D-shell connector to connect your adapter to the PROFIBUS network.

Setting the Node Address Switches

Set the node address using the 2-position thumbwheel switch. Valid settings range from 01 to 99. Use a pen to press either the + or – buttons to change the number.

Information...

PROFIBUS DP Network Connector (9-pin D-shell)

Node

Address

Switches

24V dc wiring Connection Terminals

Power Wiring

Connections are provided for connecting the required 24V dc power to the front of the module. The power wiring can be daisy-chained to the terminal base unit located next to the adapter to supply power to the module installed in that base unit.

Refer to the Installation Instructions (pub. no. 1794-5.40) you received with your adapter to learn how to install and wire the adapter.

Publication 1794-6.5.6 – April 1996

Overview of FLEX I/O and Your PROFIBUS Adapter Module 1–8

Publication 1794-6.5.6 – April 1996

Chapter 2

How Communication Takes Place and I/O Image Table Mapping

What

this Chapter Contains

Communication Over the I/O Backplane

Network

PROFIBUS Adapter

Read

Write

In this chapter, you will learn about:

• communication over the FLEX I/O backplane (between the

PROFIBUS adapter and the I/O modules)

• how data is mapped into the I/O image table

One 1794-APB PROFIBUS adapter can interface with up to eight terminal base units with installed FLEX I/O modules, forming a FLEX I/O system of up to eight slots. The adapter communicates to other network system components over the PROFIBUS network. The adapter communicates with its I/O modules over the backplane.

I/O Module

Inputs

Status

Outputs

Configuration

Slot

Read Words

Write Words

I/O Module

Inputs

Status

Outputs

Configuration

Slot 2

I/O Module

Inputs

Status

Outputs

Configuration

Slot 8

The I/O map for a module is divided into read words and write words. Read words consist of input and status words, and write words consist of output and configuration words. The number of read words or write words can be 0 or more. The length of each I/O module’s read words and write words vary in size depending on module complexity. Each I/O module will support at least 1 input word or 1 output word. Status and configuration are optional, depending on the module.

Publication 1794-6.5.6 – April 1996

How Communication Takes Place and I/O Image Table Mapping 2–2

For example, a 16 point discrete input module will have up to 2 read words and 1 write word.

Polled I/O Structure

16-point

Discrete Input Module

I/O Image

Input Size

1 or 2 W

ords

Output Size

0 or 1 W

ord

Module Image

Not used

Inputs

Not used

Delay Time

Check the I/O map for each module for the exact mapping.

The first word of output data sent by the adapter is the Adapter Status Word. Output data is received by the adapter in the order of the installed I/O modules. The Output data for Slot 1 is received first, followed by the Output data for Slot 2, and so on up to slot 8. All bits in the output status word are reserved

The first word of input data sent by the adapter is the Adapter Status Word. This is followed by the input data from each slot, in the order of the installed I/O modules. The Input data from Slot 1 is first after the status word, followed by Input data from Slot 2, and so on up to slot 8.

Network READ

Network WRITE

PROFIBUS Adapter

Read Data

Adapter Status

Slot 1 Input Data

Slot 2 Input Data

...

Slot 8 Input Data

Write Data

Adapter Status

Slot 1 Output Data

Slot 2 Output Data

...

Slot 8 Output Data

...

Read

Write

I/O Module

Slot 1

I/O Module

Slot 2

...

I/O Module

Slot 8

Publication 1794-6.5.6 – April 1996

How Communication Takes Place and I/O Image Table Mapping 2–3

I/O Module Faul

Adapter Input Status Word

The input status word consists of:

• I/O module fault bits – 1 status bit for each slot

• node address changed – 1 bit

I/O Module Fault Bits

15Bit: 01234567

814 13 12 11 10 19

Slot 8

Slot 7

Slot 6

Slot 5

Slot 1

Slot 2

Slot 3

Slot 4

Node Address Changed Bit

Reserved

The adapter input status word bit descriptions are shown in the following table.

Bit Description Bit Explanation

This bit is set (1) when an error is detected in slot position 1.

This bit is set (1) when an error is detected in slot position 2.

This bit is set (1) when an error is detected in slot position 3.

This bit is set (1) when an error is detected in slot position 4.

This bit is set (1) when an error is detected in slot position 5.

This bit is set (1) when an error is detected in slot position 6.

This bit is set (1) when an error is detected in slot position 7.

Reserved 1–7 Reserved

Node Address Changed

This bit is set (1) when an error is detected in slot position 8.

This bit is set (1) when the node address switch setting has been changed since power up.

Possible causes for an I/O module fault are:

• transmission errors on the FLEX I/O backplane

• a failed module

• a module removed from its terminal base

• incorrect module inserted in a slot position

• the slot is empty

Publication 1794-6.5.6 – April 1996

How Communication Takes Place and I/O Image Table Mapping 2–4

The node address changed bit is set when the node address switch setting has been changed since power up. The new node address does not take affect until the adapter has been powered down and then powered back up. Until this power cycling occurs, the node address switches will not match the actual node address.

Mapping

Data into

the Image Table

All FLEX I/O modules are supported by the PROFIBUS adapter. Presently, these consist of:

Module Description Catalog Number

16 Sink Input Module 1794-IB16 page 2–4

16 Source Output Module 1794-OB16 page 2–6

8 Sensor Input Module 1794-IB8S page 2–7

8 Input Module 1794-IA8 page 2–8

8 Output Module 1794-OA8 page 2–8

8 Relay Output Module 1794-OW8 page 2–9

8 Input Analog Module 1794-IE8 page 2–10

4 Output Analog Module 1794-OE4 page 2–12

4 in/2 out Analog Combo Module 1794-IE4XOE2 page 2–15

8 Input RTD Analog Module 1794-IR8 page 2–17

8 Input Thermocouple Module 1794-IT8 page 2–21

SCANport Module 1203-FM1 page 2–25

For image table

mapping, refer to:

Read

Write

I/O Image

Input Size

1 or 2 Words

Output Size

0 or 1 Word

1794-IB16 – 16-point Discrete Input Module Image T

Module

Image

Inputs

Not used

Delay Time

able Mapping

Delay Time

1794-IB16 Memory Map

Decimal Bit 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00 Size

Octal Bit

Publication 1794-6.5.6 – April 1996

17 16 15 14 13 12 11 10 07 06 05 04 03 02 01 00 Read Words

D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 Read Word 1

Not used Read Word 2

How Communication Takes Place and I/O Image Table Mapping 2–5

Octal Bit

Not used DT 12–15 DT 00–11 Write Word 1

Where D = Input Data (D0 corresponds to input 0, D1 corresponds to input 1, etc.

DT = Input Delay T

ime (DT 00–1

1 corresponds to inputs 0 thru 1

1; DT 12–15 corresponds to inputs 12 thru 15)

Read Words00010203040506071011121314151617

Publication 1794-6.5.6 – April 1996

How Communication Takes Place and I/O Image Table Mapping 2–6

Delay Time

I/O Image

Input Size

1794-IB16

Input Delay T

imes

Bits Description

02 01 00 Delay Time for Inputs 00–11

Selected

Dela

Time

05 04 03 Delay Time for Inputs 12–15

0 0 0 Delay Time 0 (default) 512µs

0 0 1 Delay Time 1 1ms

0 1 0 Delay Time 2 2ms

0 1 1 Delay Time 3 4ms

1 0 0 Delay Time 4 8ms

1 0 1 Delay Time 5 16ms

1 1 0 Delay Time 6 32ms

1 1 1 Delay Time 7 64ms

1794-OB16 – 16-point Discrete Output Module Image Table Mapping

Module

Image

Read

Write

0 or 1 Word

Output Size

1 or 2 Words

Not used

Outputs

Not used

1794-OB16 Memory Map

Decimal Bit 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00 Size

Octal. Bit 17 16 15 14 13 12 11 10 07 06 05 04 03 02 01 00 Read Words

Not used Read Word 1

O15 O14 O13 O12 O11 O10 O9 O8 O7 O6 O5 O4 O3 O2 O1 O0 Write Word 1

Not used Write Word 2

Where O

= Output value (O0 corresponds to output 0, O1 corresponds to output 1, etc.)

Publication 1794-6.5.6 – April 1996

How Communication Takes Place and I/O Image Table Mapping 2–7

Delay Time

1794-IB8S – 8-point Discrete Sensor Input Module Image Table Mapping

I/O Image

Module

Image

Input Size

Read

1 or 2 Words

Status

Inputs

Not used

Output Size

Write

0 or 1 Word

Not used

Delay Time

1794-IB8S Memory Map

Decimal Bit 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00 Size

Octal Bit 17 16 15 14 13 12 11 10 07 06 05 04 03 02 01 00 Read Words

S7 S6 S5 S4 S3 S2 S1 S0 D7 D6 D5 D4 D3 D2 D1 D0 Read Word 1

Not used Read Word 2

Not used DT 12–15 DT 00–11 Write Word 1

Where S = Status of input (where S1 corresponds to the diagnostic bit for input 1, S2 corresponds to the diagnostic bit for input 2, etc.)

D = Input Data (where D0 corresponds to input 0, D1 corresponds to input 1, etc. DT = Input Delay T

Make certain that the delay time for 00–11 is the same as the delay time for 12–15.

Smart Sensor

Bits

S = Diagnostic data – 1 = Fault present (Smart)

08–15

Standard Sensor

Bits

S = Diagnostic data – 1 = Diagnostics not disabled

08–15

ime (where DT 00–1

0 = Normal (no errors)

0 = Normal (Disabled)

1 corresponds to inputs 0 thru 1

1; DT 12–15 corresponds to inputs 12 thru 15.

Bits

D = Input data 1 = Sensor on

00–07

Bits

D = Input data 1 = Sensor on

00–07

0 = Sensor off

1794-IB8S

Input Delay T

imes

Bits Description

02 01 00 Delay Time for Inputs 00–11

Dela

05 04 03 Delay Time for Inputs 12–15

0 0 0 Delay Time 0 (default) 512µs

0 0 1 Delay Time 1 1ms

0 1 0 Delay Time 2 2ms

0 1 1 Delay Time 3 4ms

1 0 0 Delay Time 4 8ms

1 0 1 Delay Time 5 16ms

1 1 0 Delay Time 6 32ms

1 1 1 Delay Time 7 64ms

Publication 1794-6.5.6 – April 1996

Selected

Time

How Communication Takes Place and I/O Image Table Mapping 2–8

Read

Write

I/O Image

Input Size

1 or 2 Words

Output Size

0 or 1 Word

1794-IA8 – 8-point Discrete Input Module Image T

Module

Image

Not used

able Mapping

Inputs

Delay Time

1794-IA8 Memory Map

Decimal Bit 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00 Size

Octal Bit 17 16 15 14 13 12 11 10 07 06 05 04 03 02 01 00 Read Words

Not used D7 D6 D5 D4 D3 D2 D1 D0 Read Word 1

Not used Read Word 2

Not used DT 00–07 Write Word 1

Where D = Input Data (where D0 corresponds to input 0, D1 corresponds to input 1, etc.

DT = Input Delay T

ime (where DT 00–07 corresponds to inputs 0 thru 7)

Read

I/O Image

Input Size

0 or 1 Word

1794-IA8

Input Delay T

Bits Description Maximum Delay Time

02 01 00 Delay Time for Inputs 00–07 Off to On On to Off

0 0 0 Delay Time 0 (default) 8.6ms 26.6ms

0 0 1 Delay Time 1 9ms 27ms

0 1 0 Delay Time 2 10ms 28ms

0 1 1 Delay Time 3 12ms 30ms

1 0 0 Delay Time 4 17ms 35ms

1 0 1 Delay Time 5 26ms 44ms

1 1 0 Delay Time 6 43ms 61ms

1 1 1 Delay Time 7 78ms 96ms

1794-OA8 – 8-point Discrete Output Module Image T

imes

Module

Not used

able Mapping

Image

Publication 1794-6.5.6 – April 1996

Write

Output Size

1 or 2 Words

Not used

Outputs

Not used

How Communication Takes Place and I/O Image Table Mapping 2–9

1794-OA8

Decimal Bit 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00 Size

Oct. Bit 17 16 15 14 13 12 11 10 07 06 05 04 03 02 01 00 Read Words

Not used O7 O6 O5 O4 O3 O2 O1 O0 Write Word 1

Where O

= Output value (where O0 corresponds to output 0, O1 corresponds to output 1, etc.)

Memory Map

Not used Read Word 1

Not used Write Word 2

1794-OW8 – 8-point Discrete Relay Output Module Image Table Mapping

I/O Image

Module

Image

Not used

Outputs

Not used

Read

Write

Input Size

0 or 1 Word

Output Size

1 or 2 Words

Not used

1794-OW8 Memory Map

Decimal Bit 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00 Size

Oct. Bit 17 16 15 14 13 12 11 10 07 06 05 04 03 02 01 00 Read Words

Not used Read Word 1

Not used O7 O6 O5 O4 O3 O2 O1 O0 Write Word 1

Not used Write Word 2

Where O = Output value: where O0 corresponds to output 0, O1 corresponds to output 1, etc., and when bit = 0, the output is off; when bit = 1, the output is on.

Publication 1794-6.5.6 – April 1996

How Communication Takes Place and I/O Image Table Mapping 2–10

1794-IE8

I/O Image

Input Size

1 to 9 Words

Output Size

0 or 1 Word

– 8 Input Analog Module

Input Data Channel 0

Input Data Channel 1

Input Data Channel 2

Input Data Channel 3 Input Data Channel 4

Input Data Channel 5

Input Data Channel 6

Input Data Channel 7

Configure select

Module

Not used

Image

Underrange

1794-IE8 Memory Map

Decimal

Bit

Oct. Bit 17 16 15 14 13 12 11 10 07 06 05 04 03 02 01 00 Read Words

Where: PU

15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00 Size

S Analog Value Channel 0 Read Word 1

S Analog Value Channel 1 Read Word 2

S Analog Value Channel 2 Read Word 3

S Analog Value Channel 3 Read Word 4

S Analog Value Channel 4 Read Word 5

S Analog Value Channel 5 Read Word 6

S Analog Value Channel 6 Read Word 7

S Analog Value Channel 7 Read Word 8

PU Not used – set to zero U7 U6 U5 U4 U3 U2 U1 U0 Read Word 9

C7 C6 C5 C4 C3 C2 C1 C0 F7 F6 F5 F4 F3 F2 F1 F0 Write Word 1

Not used – set to 0 Write Word 2 thru 6

= Power up bit – included in series B modules only U = Underrange bits for 4-20mA inputs C = Configure select bit F = Full range bit S = sign bit (in 2’

s complement)

Publication 1794-6.5.6 – April 1996

How Communication Takes Place and I/O Image Table Mapping 2–11

Read Word 1

Read Word 2

Read Word 3

Read Word 4

Read Word 5

Read Word 6

Read Word 7

Read Word 8

1794-IE8

Range Selection Bits

Channel No. Channel 0 Channel 1 Channel 2 Channel 3 Channel 4 Channel 5 Channel 6 Channel 7

F0 C0 F1 C1 F2 C2 F3 C3 F4 C4 F5 C5 F6 C6 F7 C7

Decimal Bit 00 08 01 09 02 10 03 11 04 12 05 13 06 14 07 15

0–10V dc/0–20mA 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0

4–20mA 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1

-10 to +10V dc 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

Do Not Use

= Configure select bit

F = Full range bit

Do not use this configuration. Individual channels revert to 4–20mA if bit selection is all zeroes.

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

1794-IE8 Word/Bit Descriptions

Word Decimal Bit Definition

Read Word 1

Bits 00–14

Bits 15 Channel 0 analog data sign bit.

Bits 00–14

Read Word 2

Bits 15 Channel 1 analog data sign bit.

Bits 00–14

Read Word 3

Bits 15 Channel 2 analog data sign bit.

Bits 00–14

Read Word 4

Bits 15 Channel 3 analog data sign bit.

Bits 00–14

Read Word 5

Bits 15 Channel 4 analog data sign bit.

Bits 00–14

Read Word 6

Bits 15 Channel 5 analog data sign bit.

Bits 00–14

Read Word 7

Bits 15 Channel 6 analog data sign bit.

Bits 00–14

Read Word 8

Bits 15 Channel 7 analog data sign bit.

Channel 0 analog data – 12-bit left justified two’s complement number; unused lower bits are zero; 4-20mA uses all 16 bits.

Channel 1 analog data – 12-bit left justified two’s complement number; unused lower bits are zero; 4-20mA uses all 16 bits.

Channel 2 analog data – 12-bit left justified two’s complement number; unused lower bits are zero; 4-20mA uses all 16 bits.

Channel 3 analog data – 12-bit left justified two’s complement number; unused lower bits are zero; 4-20mA uses all 16 bits.

Channel 4 analog data – 12-bit left justified two’s complement number; unused lower bits are zero; 4-20mA uses all 16 bits.

Channel 5 analog data – 12-bit left justified two’s complement number; unused lower bits are zero; 4-20mA uses all 16 bits.

Channel 6 analog data – 12-bit left justified two’s complement number; unused lower bits are zero; 4-20mA uses all 16 bits.

Channel 7 analog data – 12-bit left justified two’s complement number; unused lower bits are zero; 4-20mA uses all 16 bits.

Publication 1794-6.5.6 – April 1996

How Communication Takes Place and I/O Image Table Mapping 2–12

Wri

DefinitionDecimal BitWord

Underrange bits (U) for individual channels (4-20mA current input only)– Bit 00 corresponds to input channel 0, bit 01

Bits 00–07

Read Word 9

te Word

Write Word 2 Bits 00–15 Not used – set to 0.

Write Word 3 Bits 00–15 Not used – set to 0.

Write Word 4 Bits 00–15 Not used – set to 0.

Write Word 5 Bits 00–15 Not used – set to 0.

Write Word 6 Bits 00–15 Not used – set to 0.

Bits 08-14

Bit 15

Bits 00–07

Bits 08–15

corresponds to input channel 1, and so on. When set (1), indicates either a broken or open input wire, or input current below 4-20mA.

Not used – set to 0.

Power Up bit – included in series B modules only. This bit is 0 in series A modules. This bit is set to 1 when all bits in the configuration register are 0 (unconfigured state). The

configuration register can be cleared by either of the reset inputs, or by the user writing all zeroes to it.

Full range bits (F) for individual channels – Bit 00 corresponds to input channel 0, bit 01 corresponds to input channel 1, and so on. Refer to range selection above.

Configure select bits (C) for individual channels – Bit 08 corresponds to input channel 0, bit 09 corresponds to input channel 1, and so on. Refer to range selection above.

Read

Write

1794-OE4

I/O Image

Input Size

0 or 1 Word

Output Size

1 or 6 Words

– 4 Output Analog Module Image T

Module

Image

Not used Not used

Config. Select

Not used

Analog Data Channel 0

Analog Data Channel 1

Analog Data Channel 2

Analog Data Channel 3

Not used

able Mapping

Diagnostics

Full Range

Publication 1794-6.5.6 – April 1996

How Communication Takes Place and I/O Image Table Mapping 2–13

Read

Write Word 1

Decimal

1794-OE4

15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00 Size

Memory Map

Bit

Oct. Bit 17 16 15 14 13 12 11 10 07 06 05 04 03 02 01 00 Read Words

PU Not used – set to 0 W3 W2 W1 W0 Read Word 1

S Analog Data – Channel 0 Write Word 1

S Analog Data – Channel 1 Write Word 2

S Analog Data – Channel 2 Write Word 3

S Analog Data – Channel 3 Write Word 4

Not used – set to 0 OE3 OE2 OE1 OE0 Write Word 5

Not used – set to 0 C3 C2 C1 C0 Not used – set to 0 F3 F2 F1 F0 Write Word 6

Not used – set to 0

Where: PU

= Power up bit – included in series B modules only W = Diagnostic bits for current output wire broken or load resistance high. (Not used on voltage outputs.) S = Sign bit (in 2’ OE = Output enable bits (bit 00 corresponds to output 0, bit 01 corresponds to output 1 and so on.

set to 1.

C = Configure select bit F = Full range bit

s complement)

1794-OE4

Range Selection Bits (W

ATTENTION: These bits must be

rite W

ord 6)

Write W

thru 14

ords 7

Channel No. Channel 0 Channel 1 Channel 2 Channel 3

F0 C0 F1 C1 F2 C2 F3 C3

Decimal Bit 00 08 01 09 02 10 03 11

4–20mA 0 1 0 1 0 1 0 1

0–10V dc/0–20mA 1 0 1 0 1 0 1 0

-10 to +10V dc 1 1 1 1 1 1 1 1

Off

= Configure select bit

F = Full range bit

When configured to of

f, individual channels will return 0V

0 0 0 0 0 0 0 0

1794-OE4 Word/Bit Descriptions

Word Decimal Bit Definition

Current outputs only – When set (1), the wire on the output is broken or the load resistance is too high. Bit 00 corresponds to channel 0, bit 01 corresponds to channel 2, and so on.

Power Up bit – included in series B modules only. This bit is 0 in series A modules. This bit is set to 1 when all bits in the configuration register are 0 (unconfigured state). The

configuration register can be cleared by either of the reset inputs, or by the user writing all zeroes to it.

Rea

Word 1

Bits 00-03

Bits 04-14 Not used – set to 0.

Bit 15

Write Word 1

Bits 00–14

Channel 0 analog data – 12-bit left justified two’s complement number; unused lower bits are zero; 4-20mA uses all 16 bits.

Bits 15 Channel 0 analog data sign bit.

Publication 1794-6.5.6 – April 1996

How Communication Takes Place and I/O Image Table Mapping 2–14

Write Word 2

Write Word 3

Write Word 4

Wri

DefinitionDecimal BitWord

Write Word 2

Bits 00–14

Channel 1 analog data – 12-bit left justified two’s complement number; unused lower bits are zero; 4-20mA uses all 16 bits.

Bits 15 Channel 1 analog data sign bit.

Write Word 3

Bits 00–14

Channel 2 analog data – 12-bit left justified two’s complement number; unused lower bits are zero; 4-20mA uses all 16 bits.

Bits 15 Channel 2 analog data sign bit.

Write Word 4

Bits 00–14

Channel 3 analog data – 12-bit left justified two’s complement number; unused lower bits are zero; 4-20mA uses all 16 bits.

Bits 15 Channel 3 analog data sign bit.

Output Enable bits. Bit 00 corresponds to input 0, bit 01

Write Word 5

Bits 00–03

corresponds to input 1, bit 02 corresponds to input 2, and bit 03 corresponds to input 3. These bits must be set to 1.

Bits 04-15 Not used – set to 0.

Full range bits (F) for individual channels – Bit 00 corresponds

Bits 00–03

to output channel 0, bit 01 corresponds to output channel 1, and so on. Refer to range selection above.

Bits 04-07 Not used – set to 0.

te Word

Bits 08–11

Configure select bits (C) for individual channels – Bit 08 corresponds to output channel 0, bit 09 corresponds to output channel 1, and so on. Refer to range selection above.

Bits 12-15 Not used – set to 0.

Write Word 7 Bits 00–15 Not used – set to 0.

Write Word 8 Bits 00–15 Not used – set to 0.

Write Word 9 Bits 00–15 Not used – set to 0.

Write Word 10 Bits 00–15 Not used – set to 0.

Write Word 11 Bits 00–15 Not used – set to 0.

Write Word 12 Bits 00–15 Not used – set to 0.

Write Word 13 Bits 00–15 Not used – set to 0.

Write Word 14 Bits 00–15 Not used – set to 0.

Publication 1794-6.5.6 – April 1996

How Communication Takes Place and I/O Image Table Mapping 2–15

Read

Write

1794-IE4XOE2 – Analog Combo Module Image T

Module

I/O Image

Input Size

0 to 5 Words

Output Size

0 to 4 Words

Not used Full Range and Configure Select

Input Data Channel 0

Input Data Channel 1

Input Data Channel 2 Input Data Channel 3

Output Data Channel 0

Output Data Channel 1

Not used

Image

Not used

able Mapping

Underrange & Diag.

1794-IE4XOE2 Memory Map

Decimal

Bit

Oct. Bit 17 16 15 14 13 12 11 10 07 06 05 04 03 02 01 00 Read Words

Where: PU

15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00 Size

S Analog Value Input Channel 0 Read Word 1

S Analog Value Input Channel 1 Read Word 2

S Analog Value Input Channel 2 Read Word 3

S Analog Value Input Channel 3 Read Word 4

PU Not used – set to 0 W1 W0 U3 U2 U1 U0 Read Word 5

S Analog Data – Output Channel 0 Write Word 1

S Analog Data – Output Channel 1 Write Word 2

Not used – set to 0 OE1 OE0 Write Word 3

Not used C5 C4 C3 C2 C1 C0 0 0 F5 F4 F3 F2 F1 F0 Write Word 4

Not used – set to 0 Write Word 5 thru 10

= Power up bit – included in series B modules only W = Diagnostic bits for current output wire broken or load resistance high. (Not used on voltage outputs.) U = Underrange bits for 4-20mA inputs OE = Output enable bits (bit 00 corresponds to output 0, bit 01 corresponds to output 1). S = Sign bit (in 2’ C = Configure select bit F = Full range bit

s complement)

ATTENTION: These bits must be set to 1.

Publication 1794-6.5.6 – April 1996

How Communication Takes Place and I/O Image Table Mapping 2–16

Read Word 1

Read Word 2

Read Word 3

Read Word 4

Read Word 5

Write Word 1

Write Word 2

1794-IE4XOE2

Channel No. Input

Channel 0

Range Selection Bits

Input

Channel 1

Input

Channel 2

Input

Channel 3

Output

Channel 0

Output

Channel 1

F0 C0 F1 C1 F2 C2 F3 C3 F4 C4 F5 C5

Decimal Bit 00 08 01 09 02 10 03 11 04 12 05 13

4–20mA 0 1 0 1 0 1 0 1 0 1 0 1

0–10V dc/0–20mA 1 0 1 0 1 0 1 0 1 0 1 0

-10 to +10V dc 1 1 1 1 1 1 1 1 1 1 1 1

Off

= Configure select bit

F = Full range bit

When configured to of

0 0 0 0 0 0 0 0 0 0 0 0

f, individual channels will return either 0V or 0mA.

1794-IE4XOE2 Word/Bit Descriptions

Word Decimal Bit Definition

Read Word 1

Bits 00–14

Bits 15 Channel 0 analog data sign bit.

Bits 00–14

Read Word 2

Bits 15 Channel 1 analog data sign bit.

Bits 00–14

Read Word 3

Bits 15 Channel 2 analog data sign bit.

Bits 00–14

Read Word 4

Bits 15 Channel 3 analog data sign bit.

Bits 00–03

Bits 04-05

Read Word 5

Bits 06–14 Not used – set to 0.

Bit 15

Bits 00–14

Write Word 1

Bits 15 Channel 0 analog data sign bit.

Bits 00–14

Write Word 2

Bits 15 Channel 1 analog data sign bit.

Channel 0 analog data – 12-bit left justified two’s complement number; unused lower bits are zero; 4-20mA uses all 16 bits.

Channel 1 analog data – 12-bit left justified two’s complement number; unused lower bits are zero; 4-20mA uses all 16 bits.

Channel 2 analog data – 12-bit left justified two’s complement number; unused lower bits are zero; 4-20mA uses all 16 bits.

Channel 3 analog data – 12-bit left justified two’s complement number; unused lower bits are zero; 4-20mA uses all 16 bits.

Underrange bits (U) for individual channels

(4-20mA current

inputs only) – Bit 00 corresponds to input channel 0, bit 01

corresponds to input channel 1, and so on.

Wire Off bits (W) – Current outputs only – When set (1), the wire on the current output is broken or the load resistance is too high. Bit 00 corresponds to channel 0, bit 01 corresponds to channel 2, and so on.

Power Up bit – included in series B modules only. This bit is 0 in series A modules. This bit is set to 1 when all bits in the configuration register are 0 (unconfigured state). The

configuration register can be cleared by either of the reset inputs, or by the user writing all zeroes to it.

Channel 0 analog data – 12-bit left justified two’s complement number; unused lower bits are zero; 4-20mA uses all 16 bits.

Channel 1 analog data – 12-bit left justified two’s complement number; unused lower bits are zero; 4-20mA uses all 16 bits.

Publication 1794-6.5.6 – April 1996

How Communication Takes Place and I/O Image Table Mapping 2–17

Write Word 3

Wri

DefinitionDecimal BitWord

Write Word 3

Bits 00–01

Bits 02–15 Not used – set to 0.

Bits 00–05

Bits 06–07 Not used – set to 0.

te Word

Bits 08–13

Bits 14–15 Not used – set to 0.

Write Word 5 Bits 00–15 Not used – set to 0.

Write Word 6 Bits 00–15 Not used – set to 0.

Write Word 7 Bits 00–15 Not used – set to 0.

Write Word 8 Bits 00–15 Not used – set to 0.

Write Word 9 Bits 00–15 Not used – set to 0.

Write Word 10 Bits 00–15 Not used – set to 0.

Output Enable bits. Bit 00 corresponds to output 0, bit 01 corresponds to output 1. These bits must be set to 1.

Full range bits (F) for individual channels – Bit 00 corresponds to input channel 0, bit 01 corresponds to input channel 1, bit 02 corresponds to input channel 3, bit 03 corresponds to input channel 3, bit 04 corresponds to output channel 1, and bit 05 corresponds to output channel 2. Refer to range selection above.

Configure select bits (C) for individual channels – Bit 08 corresponds to input channel 0, bit 09 (11) corresponds to input channel 1, bit 10 (12) corresponds to input channel 2, bit 11 (13) corresponds to input channel 3, bit 12 (14) corresponds to output channel 0, and bit 13 (15) corresponds to output channel 1. Refer to range selection above.

1794-IR8

– RTD Input Analog Module Image T

Module

Image

able Mapping

Reserved

Input Data Channel 0

I/O Image

Input Size

1 to 11 Words

Overrange

Calibration Mask

Output Size

0 to 3 Words

Input Data Channel 1

Input Data Channel 2

Input Data Channel 3 Input Data Channel 4

Input Data Channel 5

Input Data Channel 6

Input Data Channel 7

Underrange

Calibration Status

Configuration

RTD Type

Publication 1794-6.5.6 – April 1996

How Communication Takes Place and I/O Image Table Mapping 2–18

1794-IR8 Read

Dec. Bit 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00

Oct. Bit 17 16 15 14 13 12 11 10 07 06 05 04 03 02 01 00

Read Word 1 Reserved

Read Word 2 Channel 0 Input Data

Read Word 3 Channel 1 Input Data

Read Word 4 Channel 2 Input Data

Read Word 5 Channel 3 Input Data

Read Word 6 Channel 4 Input Data

Read Word 7 Channel 5 Input Data

Read Word 8 Channel 6 Input Data

Read Word 9 Channel 7 Input Data

Read Word 10 Overrange Bits Underrange Bits

Bad

Read Word 11 0 0 0 0 0

Cal

Done

Cal

Range

0 Diagnostic Status Bits

Pwr

0 0 0

1794-IR8 W

rite

Dec. Bit 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00

Oct. Bit 17 16 15 14 13 12 11 10 07 06 05 04 03 02 01 00

Cal

Write Word 1 8-bit Calibration Mask

Clk

Cal

Filter Cutoff Enh MDT

Write Word 2 RTD 3 Type RTD 2 Type RTD 1 Type RTD 0 Type

Write Word 3 RTD 7 Type RTD 6 Type RTD 5 Type RTD 4 Type

Where: Enh

= Enhanced

MDT = Module Data Type

1794-IR8 Word/Bit Descriptions

Word

Read Word 1

Read Word 2

Read Word 3

Read Word 4

Read Word 5

Read Word 6

Read Word 7

Read Word 8

Read Word 9

Dec. Bits

(Octal Bits)

00–15 (00–17)

Description

Reserved

Channel 0 Input data

Channel 1 Input data

Channel 2 Input data

Channel 3 Input data

Channel 4 Input data

Channel 5 Input data

Channel 6 Input data

Channel 7 Input data

Publication 1794-6.5.6 – April 1996

How Communication Takes Place and I/O Image Table Mapping 2–19

Word

Read Word 10

Dec. Bits

(Octal Bits)

00–07 Underrange bits – these bits are set if the input signal is below the input channel’s minimum range.

08–15 (10–17)

Read Word 11

00–01 Not used – set to 0

02 Reserved

03 Powerup bit – this bit is set (1) until configuration data is received by the module.

04–06 Critical Error bits – If these bits are anything other than all zeroes, return the module to the factory

07 Unused – set to 0

08 (10)

09 (11) Calibration Done bit – set to 1 after an initiated calibration cycle is complete.

10 (12)

1–15 (13–17)

Write word 1 00–01

02 Enhanced mode select – measures voltage drop across a precision resistor in the module to

03–05 A/D Filter First Notch Frequency

06 Calibration High/Low bit – This bit is set during gain calibration; reset during offset calibration.

07 Calibration clock – this bit must be set to 1 to prepare for a calibration cycle; then reset to 0 to

08–15 Calibration mask – The channel, or channels, to be calibrated will have the correct mask bit set.

Description

Overrange bits – these bits are set if 1), the input signal is above the input channel’s maximum

range, or 2), an open detector is detected.

for repair

Calibration Range bit – set to 1 if a reference signal is out of range during calibration

Calibration Bad bit – set to 1 if the channel has not had a valid calibration.

Unused – set to 0

Module Data Type

Bit 01 00

0 0oC (default)

0 1oF

1 0 Bipolar counts scaled between –32768 and +32767

1 1 Unipolar counts scaled between 0 and 65535

compare with the unknown input.

Bit 05 04 03 Definition

0 0 0 10Hz (default)

0 0 1 25Hz

0 1 0 50Hz

0 1 1 60Hz

1 0 0 100Hz

1 0 1 250Hz

1 1 0 500Hz

1 1 1 1000hZ

initiate calibration.

Bit 0 corresponds to channel 0, bit 1 to channel 1, and so on.

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How Communication Takes Place and I/O Image Table Mapping 2–20

Word

Write Word 2

Write Word 3

Dec. Bits

(Octal Bits)

00–03 Channel 0 RTD Type

Bit 03 02 01 00 RTD Type – Range

0 0 0 0 Resistance (default)

0 0 0 1 No sensor connected – do not scan 0 0 1 0 100 ohm Pt α = 0.00385 Euro (–200 to +870oC) 0 0 1 1 100 ohm Pt α = 0.003916 U.S. (–200 to +630oC) 0 1 0 0 200 ohm Pt α = 0.00385 (–200 to +630oC) 0 1 0 1 500 ohm Pt α = 0.00385 (–200 to +630oC)

0 1 1 0 Reserved

0 1 1 1 10 ohm Copper (–200 to +260oC)

1 0 0 0 120 ohm Nickel (–60 to +250oC)

1 0 0 1 100 ohm Nickel (–60 to +250oC)

1 0 1 0 200 ohm Nickel (–60 to +250oC)

1 0 1 1 500 ohm Nickel (–60 to +250oC)

1 1 0 0 Module data time stamp

1101 to 111

1 – Reserved

04–07 Channel 1 RTD Type (see bits 00–03)

08–11 Channel 2 RTD Type (see bits 00–03)

12–15 Channel 3 RTD Type (see bits 00–03)

00–03 Channel 4 RTD Type (see write word 2, bits 00–03)

04–07 Channel 5 RTD Type (see write word 2, bits 00–03)

08–11 Channel 6 RTD Type (see write word 2, bits 00–03)

12–15 Channel 7 RTD Type (see write word 2, bits 00–03)

Description

Publication 1794-6.5.6 – April 1996

How Communication Takes Place and I/O Image Table Mapping 2–21

1794-IT8

I/O Image

Input Size

1 to 11 Words

Output Size

0 to 3 Words

1794-IT8 Read

– Thermocouple Input Module Image T

Module

Image

Reserved

Input Data Channel 0

Input Data Channel 1

Input Data Channel 2

Input Data Channel 3

Input Data Channel 4

Input Data Channel 5

Input Data Channel 6

Input Data Channel 7

Overrange

Calibration Status

Calibration Mask

Thermocouple Type

Underrange

Configuration

able Mapping

Dec. Bit 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00

Octal Bit 17 16 15 14 13 12 11 10 07 06 05 04 03 02 01 00

Read Word 1 Reserved

Read Word 2 Channel 0 Input Data

Read Word 3 Channel 1 Input Data

Read Word 4 Channel 2 Input Data

Read Word 5 Channel 3 Input Data

Read Word 6 Channel 4 Input Data

Read Word 7 Channel 5 Input Data

Read Word 8 Channel 6 Input Data

Read Word 9 Channel 7 Input Data

Read Word 10 Overrange Bits Underrange Bits

Bad

Read Word 11 0 0 0 0 0

Cal

Done

Cal

Range

0 Diagnostics

Pwr

Bad

Structure

CJC over

CJC

Under

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How Communication Takes Place and I/O Image Table Mapping 2–22

1794-IT8 Write

Dec. Bit 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00

Octal Bit 17 16 15 14 13 12 11 10 07 06 05 04 03 02 01 00

Cal

Write Word 1 8-Bit Calibration Mask

Clk

Cal hi Cal lo

Filter Cutoff FDF Data Type

Write Word 2 Thermocouple 3 Type Thermocouple 2 Type Thermocouple 1 Type Thermocouple 0 Type

Write Word 3 Thermocouple 7 Type Thermocouple 6 Type Thermocouple 5 Type Thermocouple 4 Type

Where: FDF

= fixed digital filter bit

1794-IT8 Word/Bit Descriptions

Word

Read Word 1

Read Word 2

Read Word 3

Read Word 4

Read Word 5

Read Word 6

Read Word 7

Read Word 8

Read Word 9

Read Word 10

Read Word 11

Decimal Bit

(Octal Bit)

00–15 (00–17)

00–07 (00–07)

08–15 (10–17)

Reserved

Channel 0 Input data

Channel 1 Input data

Channel 2 Input data

Channel 3 Input data

Channel 4 Input data

Channel 5 Input data

Channel 6 Input data

Channel 7 Input data

Underrange bits – these bits are set if the input signal is below the input channel’s minimum range.

Overrange bits – these bits are set if 1), the input signal is above the input channel’s maximum range,

Description

or 2), an open detector is detected.

00 (00)

01 (01)

02 (02)

03 (03)

04–06 (04–06)

07 (07)

08 (10)

Cold Junction sensor underrange bit. – this bit is set if the cold junction temperature is below 0oC.

Cold Junction sensor overrange bit. – this bit is set if the cold junction temperature is above 70oC.

Bad Structure – this bit is set if there is an invalid thermocouple type selected.

Powerup bit – this bit is set (1) until configuration data is received by the module.

Critical Fault bits – If these bits are anything other than zero, return the module to the factory for repair.

Unused – set to 0

Calibration Range bit – set to 1 if a reference signal is out of range during calibration

09 (11) Calibration Done bit – set to 1 after an initiated calibration cycle is complete.

10 (12)

1–15 (13–17)

Calibration Bad bit – set to 1 if the channel has not had a valid calibration.

Unused – set to 0

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How Communication Takes Place and I/O Image Table Mapping 2–23

Word

Write Word 1

Decimal Bit

(Octal Bit)

00–01 (00–01)

Module Data Type

Description

Bit 01 00 Definition

0 0oC (default)

0 1oF

1 0 Bipolar counts scaled between –32768 and +32767

1 1 Unipolar counts scaled between 0 and 65535

Bit 02 (02) Fixed Digital Filter – When this bit is set (1), a software digital filter is enabled. This filter settles to

100% of a Full Scale step input in 60 scans.

03–05 (03–05)

A/D Filter First Notch Frequency

Bit 05 04 03 Definition

0 0 0 10Hz (default)

0 0 1 25Hz

0 1 0 50Hz

0 1 1 60Hz

1 0 0 100Hz

1 0 1 250Hz

1 1 0 500Hz

1 1 1 1000hZ

06 (06)

07 (07)

Calibration High/Low bit – This bit is set during gain calibration; reset during offset calibration.

Calibration clock – this bit must be set to 1 to prepare for a calibration cycle; then reset to 0 to initiate

calibration.

08–15 (10–17)

Calibration mask – The channel, or channels, to be calibrated will have the correct mask bit set. Bit 8 corresponds to channel 0, bit 9 to channel 1, and so on.

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How Communication Takes Place and I/O Image Table Mapping 2–24

Word

Write Word 2

Write Word 3

Decimal Bit

(Octal Bit)

00–03 (00–03)

04–07 (04–07)

08–1

1 (10–13)

12–15 (14–17)

00–03 (00–03)

04–07 (04–07)

08–1

1 (10–13)

12–15 (14–17)

Description

Channel 0 Thermocouple Type

Bit 03 02 01 00 Thermocouple Type – Range

0 0 0 0 Millivolts (default)

0 0 0 1 B 300 to 1800oC (572 to 3272oF)

0 0 1 0 E –270 to 1000oC(–454 to 1832oF)

0 0 1 1 J –210 to 1200oC(–346 to 2192oF)

0 1 0 0 K –71 to 1372oC(–95 to 2502oF)

0 1 0 1 R –50 to 1768oC(–58 to 3214oF)

0 1 1 0 S –50 to 1768oC(–58 to 3214oF)

0 1 1 1 T –73 to 400oC(–99 to 752oF)

1 0 0 0 C 0 to 2315oC (32 to 4199oF)

1 0 0 1 N –270 to 1300oC(–450 to 2372oF)

1 0 1 0 Reserved

1 0 1 1 Reserved

1 1 0 0 Module reports cold junction temperature for channels 00–03

1 1 0 1 Module reports cold junction temperature for channels 04–07

1 1 1 0 Reserved

1 1 1 1

No sensor connected (do not scan)

Channel 1 Thermocouple Type (see bits 00–03)

Channel 2 Thermocouple Type (see bits 00–03)

Channel 3 Thermocouple Type (see bits 00–03)

Channel 4 Thermocouple Type (see word 13, bits 00–03)

Channel 5 Thermocouple Type (see word 13, bits 00–03)

Channel 6 Thermocouple Type (see word 13, bits 00–03)

Channel 7 Thermocouple Type (see word 13, bits 00–03)

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How Communication Takes Place and I/O Image Table Mapping 2–25

1203-FM1 – SCANport Module Image T

I/O Image

Connection StatusChannel 2

Read

6 Words

Write

5 Words

Connection

Status W

Connection Enable Channel 2

ord Definition

Logic Status Channel 1

Analog Feedback Channel 1

Logic Status Channel 2

Analog Feedback Channel 2

Logic Command Channel 1

Analog Reference Channel 1

Logic Command Channel 2

Analog Reference Channel 2

able Mapping

Module Image

Connection Status Channel 1

1 Word

Connection Enable Channel 1

Not Used

Connection Status Channel 2 Connection Status Channel 1

Bit:

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

Not Used V2 ID2 Not Used V1 ID1

Description

V1 SCANport channel 1 valid data bit. When high (1), the Logic Status

and Analog Feedback values are valid and can be used. When low (0), the values should not be used.

ID1 SCANport channel 1 connected peripheral port ID number. This three

bit field contains the port number that channel 1 is connected to on the SCANport device. It should contain a value between 1 and 7. If this field is 7, then the channel is not connected to the SCANport device, or the SCANport device may not be powered.

V2 SCANport channel 2 valid data bit. When high (1), the Logic Status

and Analog Feedback values are valid and can be used. When low (0), the values should not be used.

ID2 SCANport channel 2 connected peripheral port ID number. This three

bit field contains the port number that channel 2 is connected to on the SCANport device. It should contain a value between 1 and 7. If this field is 7, then the channel is not connected to the SCANport device, or the SCANport device may not be powered.

Logic Status/Analog Feedback Definition

The Logic Status and Analog Feedback values are defined within the product manuals of the connected SCANport device(s).

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How Communication Takes Place and I/O Image Table Mapping 2–26

Connection

Bit:

E1 SCANport channel 1 enable bit. When set to 1, the module will

E2 SCANport channel 2 enable bit. When set to 1, the module will

Enable W

Connection Enable Channel 2 Connection Enable Channel 1

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

attempt to connect to the SCANport device. When reset to 0, the module stops communicating with the connected SCANport device. This usually causes the device to fault.

ord Definition

Not Used E2 Not Used E1

Description

Logic Command/Analog Reference Definition

The Logic Command and Analog Reference values are defined within the product manuals of the connected SCANport device(s).

Publication 1794-6.5.6 – April 1996

How Communication Takes Place and I/O Image Table Mapping 2–27

Defaults

Each I/O module has default values associated with it. At default, each module will generate inputs/status and expect outputs/configuration.

Module Defaults for: Adapter Defaults Optimal Sizes

Catalog Number

1794-IB16 16-pt 24V dc Sink Input 1 1 1 0

1794-OB16 16-pt 24V dc Source Output 1 1 0 1

1794-IA8 8-pt 120V ac Input 1 1 1 0

1794-OA8 8-pt 120V ac Output 1 1 0 1

1794-IB8S 8-pt 24V dc Sensor Input 1 1 1 0

1794-OW8 8-pt Relay Output 1 1 0 1

1794-IE8 8-pt Analog Input 9 6 8 0

1794-OE4 4-pt Analog Output 1 14 0 4

1794-IE4XOE2 4 in/2 out Analog Combo 5 10 4 2

1794-IR8 8-pt RTD Analog Input 11 4 10 0

1794-IT8 8-pt Thermocouple Input 11 4 10 0

1203-FM1 SCANport Module 6 5 4 3

Description

Input

Default

Output Default

Input

Default

Output Default

PROFIBUS Manager Software

Catalog Number 1785-PFBMGR

Information...

The default values reflect the maximum number of read/write words.

You can change the I/O data size for a module by reducing the number of words mapped into the adapter module, as shown in optimal sizes.

Optimal sizes are the settings that provide optimal data to and from the I/O module. You need a software configuration tool to change the size. If you are using the Allen-Bradley 1785-PFB/B coprocessor as a master, you must use the Allen-Bradley PROFIBUS Manager Software configuration tool. Since the FLEX I/O adapter is compatible with any master, you can use any comparable configuration tool available on the market.

The optimal settings provide the fastest network time by only mapping read and write words used by the I/O modules. If you reduce your data sizes to only include optimal data, you can only change your configuration data with a software tool. If you need to change configuration information on an optimal basis, your data size must be large enough to include the necessary words.

If you are using PROFIBUS Manager Software to configure your adapter, refer to your PROFIBUS Manager Software User Manual, publication 1785-6.5.20 for more information.

Publication 1794-6.5.6 – April 1996

How Communication Takes Place and I/O Image Table Mapping 2–28

For additional information on FLEX I/O modules, refer to the following publications.

Module Description

16 Sink Input Module 1794-IB16 1794-5.4

16 Source Output Module 1794-OB16 1794-5.3

8 Sensor Input Module 1794-IB8S 1794-5.7

8 Input Module 1794-IA8 1794-5.9

8 Output Module 1794-OA8 1794-5.10

8 Relay Output Module 1794-OW8 1794-5.19

8 Input Analog Module 1794-IE8 1794-5.6

4 Output Analog Module 1794-OE4 1794-5.5

4 in/2 out Analog Combo Module 1794-IE4XOE2 1794-5.15

8 RTD Input Analog Module 1794-IR8 1794-5.22 1794-6.5.4

8 Thermocouple Input Module 1794-IT8 1794-5.21 1794-6.5.7

SCANport Module 1203-FM1 1203-5.8

Catalog

Number

Installation Instructions

User Manual

1794-6.5.2

Publication 1794-6.5.6 – April 1996

ith

(bits/s) o

(bits/s) of:

Chapter 3

What

this Chapter Contains

The DP Physical Layer

Connect

the Adapter to the

PROFIBUS DP Network

This chapter describes:

• the DP physical layer

• using line types A and B

• equipment you need

• how to connect the adapter to the network

• how to terminate the network

The PROFIBUS network media is a balanced transmission line corresponding to the standard EIA RS-485, terminated at both ends. Both line A and line B types are available, depending on your system requirements.

Specifications and guidelines for DP media:

• linear bus, terminated at both ends

• drop cables (preferably no longer than .30m), no branches

• shielded twisted pair

• max. line length between 100 and 1200m (depending on baudrate

and cable type)

• number of stations: 32

• DP baudrates: 9.6, 19.2, 93.75, 187.5, 500 Kbit/s and 1.5M bit/s

Use the following table to determine what line type will best meet your needs.

Bus Segments and Drop Cables

Characteristic

Impedance Capacity t30 pF/m t60 pF/m Resistance Wire Gauge u0.64 mm u0.53 mm Conductor Area u0.34 mm

v19.2k 1200 m

Maximum Length w

a Baud Rate

= Not Applicable

using a combination of both line types, divide the lengths shown by two.

This

is the sum of all bus segment and drop cable lengths.

93.75k 1200 m

187.5k 1000 m 500k 400 m

1.5M 200 m

Line A Requirements Line B Requirements

135–165 W (3–29 MHz) 100–130 W (fu

t110 W/km

–

u0.22 mm 1200 m 1200 m

600 m

200 m NA v 0.2nF

100 kHz)

Publication 1794-6.5.6 – April 1996

Total Capacity of

all Drop Cables

v15nF v3nF v1nF v0.6nF

Connect the Adapter to the PROFIBUS DP Network 3–2

Cabling and Equipment

Required for Line A T

ype

Line A cabling can support baudrates as high as 1.5M bits/s.

Cables

You need a shielded twisted pair cable for your cabling (bus segments or drop cables). Any line A cable available on the market can be used to connect your adapter to a PROFIBUS network.

T-junction Connectors

You need t-junction connectors to connect your droplines to bus segments. You can use any t-junctions available on the market.

Termination

Termination blocks are only needed if the devices on the end of the network do not have built-in terminating resistors. If you need termination blocks, you can use any termination blocks available on the market.

Bus Connector

Connect your adapter to the PROFIBUS DP network by attaching a bus connector to the female 9 pin D-Sub connector on the front of the module.

Blocks

Information...

Important: For detailed information on the topology and cabling

for line A, see the PROFIBUS Standard (DIN 19245 Parts 1 & 3, Issue 1994).

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Connect the Adapter to the PROFIBUS DP Network 3–3

Cabling and Equipment

Required for Line B T

ype

Line B cabling can support baudrates as high as 500k bits/s.

Cables

You need a shielded twisted pair cable for your cabling (bus segments or drop cables). Any shielded twisted pair cables available on the market can be used to connect your adapter to a PROFIBUS network, however, bus segment cables must contain wire for data ground and a cable braid shield. We recommend Sprecher+Schuh cable as shown in the table below.

T-junction Connectors

You need t-junction connectors to connect your droplines to bus segments. You can use any t-junctions available on the market, however, we recommend Sprecher+Schuh connectors as shown in the table below.

Termination

Blocks

Termination blocks are only needed if the devices on the end of the network do not have built-in terminating resistors. If you need to use termination blocks, any termination blocks available on the market can be used, however, we recommend Sprecher+Schuh termination blocks as shown in the table below.

Information...

Bus Connector

Connect your adapter to the PROFIBUS DP network by attaching a bus connector to the female 9 pin D-Sub connector on the front of the module.

Important: For detailed information on the topology and cabling

for line B, see the PROFIBUS Standard (DIN 19245 Parts 1 & 3, Issue 1994).

Equipment Type Catalog Number Part Number

Drop cable T

-junction connector Bus segment cable Sprecher + Schuh none 299.257.001 Bus segment 1m Sprecher + Schuh PCB-10 87.890.281-10 Connector Sprecher + Schuh none 87.890.283-01 Termination Block Sprecher + Schuh PCE-0 87.890.284-01

Sprecher + Schuh PTL-2, PTL-4, or PDC-10 87.890.282-10 Sprecher + Schuh PTS-0 87.890.276-01

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Connect the Adapter to the PROFIBUS DP Network 3–4

Connect the Adapter to the Network

= Drop Cable

= Bus Segment

= Termination Block

= T–junction

PROFIBUS Media (trunk cable)

For line A or B connections, use bus segments with t-junctions and termination blocks to form the PROFIBUS media (trunk cable). Use termination blocks to terminate the line at each end of the trunk cable. Use drop cables to connect devices to the network.

The maximum number of stations on the same network is 32.

Personal Computer with Configuration

PROFIBUS DP Master/Scanner Controller

Other DP Adapter/Slave

Software

1794-APB Adapter Slave

Flex I/O System

Other DP Adapter/Slave

Publication 1794-6.5.6 – April 1996

Connect the Adapter to the PROFIBUS DP Network 3–5

Connect to the Adapter

Connect your drop cable (using either line A or B) to the adapter as shown below:

PROFIBUS ADAPTER

.01µF 500V dc

DROP CABLE

RCV/ Xmit Data +

RCV/ Xmit Data –

Data

Earth

Ground

•

Ground

Shield

1 MΩ

Signal +

Signal –

+ 5 V

Pin #1

Pin #3

Pin #8

Pin #5

Pin #6

1. Connect the cable shield to Pin #1. The shield is connected to the

FLEX I/O chassis ground through an RC circuit as shown above.

2. Connect the data signal pins on both ends (Signal + Pin #3 and

Signal – Pin#8).

3. Insert the wired connector into the mating connector on the

PROFIBUS adapter.

Publication 1794-6.5.6 – April 1996

Connect the Adapter to the PROFIBUS DP Network 3–6

Terminate the Network

You must use termination blocks only if your devices on the end of the network do not have built-in terminating resistors.

Terminate the PROFIBUS media (trunk cable) at both ends of the network. If you are not using a connector with built-in resistors, terminate the cable at the adapter connector as shown below.

Terminate at the Adapter Using Line A

Since Line A has a higher line impedance, you must use the following termination resistors:

390 Ω

220 Ω

390 Ω

. .

(2%,

. .

 1/4 W)

CABLE

PROFIBUS DP ADAPTER

+ 5 V 6

Signal +

Signal -

Data Ground

Terminate at the Adapter Using Line B

Use the following termination resistors with line B:

390 Ω

150 Ω

390 Ω

. .

(2%,

 1/4 W)

PROFIBUS DP ADAPTER

+ 5 V 6

Signal +

Signal -

Data Ground

. .

CABLE

Publication 1794-6.5.6 – April 1996

Chapter 4

What

this Chapter Contains

How Master/Slave Communication Takes Place

Configure

the Adapter for

Master/Slave Communication

In this chapter, we describe:

• how master/slave communication takes place

• entering user parameter data

• entering check configuration data

• read configuration response data

• a programming configuration example using Allen-Bradley

PROFIBUS manager software

A data exchange between the master and slave cannot be performed until check configuration and send parameter data are issued. Each time you power-up the network, the master sends check configuration and send parameter data to the slave (FLEX I/O adapter).

Check configuration data determines or checks the number of input and output words used by each FLEX I/O module.

PROFIBUS Manager Software

Catalog Number 1785-PFBMGR

Software diskette with GSD file

Send parameter data contains device-specific parameters you define for each FLEX I/O module.

You need a software configuration tool to set the values associated with these parameters. If you are using the Allen-Bradley 1785-PFB/B coprocessor as a master, you must use the Allen-Bradley PROFIBUS Manager Software configuration tool. Since the FLEX I/O adapter is compatible with any master, you can use any configuration tool available on the market.

The device database (GSD) file is included on the software diskette you received with your shipment of the FLEX I/O adapter. The GSD file is used by your configuration tool to help you set up your system. Your configuration tool automatically reads the GSD file and extracts defaults used in the data exchange.

The file is in ASCII format and you can view it with any text editor. A printed copy of your GSD file appears in Appendix B of this user manual.

The user parameter data fields are not defined in the GSD file. Depending on the format you choose, you may have to manually edit these values with your configuration tool.

Publication 1794-6.5.6 – April 1996

Configure the Adapter for Master/Slave Communication 4–2

Information...

For more information on how you define and enter these user parameter values, refer to the documentation associated with your master and software configuration tool. If you are using an Allen Bradley 1785-PFB/B Coprocessor master, refer to publications 1785-6.5.15 and 1785-6.5.20.

Entering User Parameter Data

Send parameter data is comprised of a string of octets (1–32) that contains 244 bytes of data:

• octets 1–7 contain data specific to the:

– PROFIBUS standard – defaults contained in the database (GSD) file

• octets 8–32 are user configurable and contain user parameter

data. User parameter data consists of these formats:

– auto configure – condensed – full

The following illustration shows the structure of the send parameter data table.

Octet 1 Octet 2 Octet 3 Octet 4 Octets 5&6 Octet 7 Octets 8–32

Station

Status

Watchdog

Control

These values are defined by the PROFIBUS

Watchdog

Control

standard. The defaults are provided by

Minimum

Station

Delay

the GSD file.

Ident.

Number

Group

Ident.

User Parameter Data

You configure these values using your

software configuration tool.

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Configure the Adapter for Master/Slave Communication 4–3

User Parameter Data

The first byte of the user parameter data is the flags byte. This byte selects the appropriate format and also specifies adapter behavior. The flags byte is defined in the following table:

Send Parameter Data Flags Byte

Bit Position Name Description

0–1 Format Selection 00 = Auto Configure

2–3 Fault Action 00 = Reset to zero

4 Format Selection 0 = Reset inputs to

5–7 Reserved Reserved bits must

01 = Reserved

10 = Condensed

11 = Full

01 = Hold Last State

10 = Use Safe State

1 = Reserved

zero

1 = Hold Last Value

be zero

If the send parameter data is received with no user parameter data, the flags byte is set to zero which selects:

• auto configure

• reset outputs to zero on fault

• reset inputs to zero on fault

The reserved bits must be set to zero to prevent undesired firmware update behavior. This is the default behavior of the module as defined in the GSD file.

The descriptions in this chapter use the following example FLEX I/O configuration to explain the information required for each of these functions:

1794-APB Adapter Slave

1794-IB16 1794-OB16 1794-IE8 1794-OE4

Flex I/O System

Module ID#: 0281h ID#: 0191h ID# 1920h ID# 1121h

Publication 1794-6.5.6 – April 1996

Configure the Adapter for Master/Slave Communication 4–4

Auto Configure Format

The Auto Configure format allows you to change modules without affecting the User Parameter or Check Configuration data. This format provides no keying from the master on the I/O modules installed in the FLEX I/O system. The installed module at power-up is taken as the key.

If you change a module while it is being controlled by a master, a minor recoverable fault will occur. To recover from this fault, you must replace the module with an identical module type.

User Parameter Example

User Parameter Message, Auto Configure Format (Length 1 byte)

Name Value Description

Octet 8: 00h Auto Configure Format, Reset to Zero on Fault

Condensed Format

The condensed format consists of the flags byte and the module key parameter for each of the eight slots. This parameter dictates which I/O module must be installed. If at any time the actual module ID does not match this module key, the slot will be considered in fault and the following occurs:

• STATUS LED flashes red/off

• an error bit in the poll response data is set

• a diagnostic bit in the Ext_Diag_Data field returned in the Read

DP–Slave Diagnostic Information message response is set

All eight slots must be configured. The size for this format is always 17 bytes (including the flags byte). The condensed format structure must be repeated for each of the eight slots.

Data format for Condensed Format

Name Size Description

Module Key WORD Module ID # that must be installed

Only bits 0–12 are used. Bits 13–15 must be zero except when keying an empty

slot where 0FFFFh is used.

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Configure the Adapter for Master/Slave Communication 4–5

The following table shows the identification numbers for current FLEX I/O modules.

FLEX I/O Module

Catalog Number

Four-word Modules

1794-IB16 0281h

1794-OB16 0191h

1794-IA8 0285h

1794-OA8 0195h 1794-IB8S 0289h 1794-OW8 0199h

Sixteen-word Modules

1794-IE8/A 1920h

1794-OE4/A 1121h

1794-IE4XOE2/A 1522h

1794-IT8 1B00h 1794-IR8 1B01h

1794-IE8/B 1924h

1794-OE4/B 1125h

1794-IE4XOE2 1526h

1293-FM1 1600h

Module Identification

Number (module key)

When you use the condensed format, no safe state data can be defined, thus the safe state data is left at the power up default of all zeroes. Setting the Fault Action in the byte to Use Safe State with this format is the equivalent of setting Reset to Zero.

Information...

User Parameter Example

User Parameter Message, Condensed Format (Length 17 bytes)

Name Value Description

Octet 8: 02h Condensed Format, Reset to Zero on Fault,

Rest Inputs to Zero Octet 9–10: 0281h 1794-IB16 16-point discrete input module Octet 11–12: 0191h 1794-OB16 16-point discrete output module Octet 13–14: 1920h 1794-IE8 8-point analog input module Octet 15–16: 1121h 1794-OE4 4-point analog output module Octet 17–18: 0FFFFh Empty Octet 19–20: 0FFFFh Empty Octet 21–22: 0FFFFh Empty Octet 23–24: 0FFFFh Empty

Refer to the configuration example on page 4–11 to understand how and where to enter this data.

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Configure the Adapter for Master/Slave Communication 4–6

Full Format

The full format consists of the flags byte and four parameters for each of the eight slots. The module key parameter is the same for the full format as defined by the condensed format, but adds three more parameters for each slot.

Use the full format to:

• provide Safe State values for output points

• send FLEX I/O module configurations once (when you send

parameters) instead of every poll

• configure data sizes to reduce the size of data required during run

mode

You must configure all eight slots. The minimum size is 25 bytes (no slots have FLEX I/O module configuration or safe state data). The maximum size is 237 bytes (the size of the PROFIBUS user parameter area).

Data format for Full Format

Name Size Description

Module Key WORD Module ID that must be installed Module Data

Sizes Safe State Data ARRAY Output Safe States. Word array of size Safe

Module Configuration Data

Only bits 0–12 are used. Bits 13–15 must be zero except when keying an empty slot

where 0FFFFh is used.

Each of the two sizes can range from 0–15 words but when combined cannot exceed 15

words total.

BYTE Bits 0–3 Safe State Size (in words)

Bits 4–7 Config Size (in words)

State Size.

ARRAY Flex Module Configuration. Word array of size

Config Size.

There are some possible configurations of FLEX I/O modules that would exceed the user parameter area of 237 bytes. Be aware of the totals of the words and modules you are using.

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Configure the Adapter for Master/Slave Communication 4–7

The data format is repeated for each Flex I/O slot. and all slots are configured, even when empty.

Slot #1

Module Data Sizes

Module Configuration Data

Slot #2

Module Data Sizes

Slot #3

Module Data Sizes

Module Configuration Data

Slot #4

Module Data Sizes

Module Configuration Data

Slot #5

Module Data Sizes

Slot #6

Module Data Sizes

Slot #7

Module Data Sizes

Slot #8

Module Data Sizes

Flags byte

Module Key

Safe State Data

Module Key

Safe State Data

Module Key

User Parameter Example

User Parameter Message, Full Format (Length 43 bytes)

Name Value Description

Octet 8: 02h Full Format, Reset to Zero on Fault Octet 9–10: 0281h Slot 1 Module Key 1794-IB16 16-point discrete input module Octet 11: 10h Slot 1 config size 1 word, safe state size 0 words Octet 12–13: 0000h 1 config word, input delay times Octet 14–15: 0191h Slot 2 Module Key 1794-OB16 16-point discrete output module Octet 16: 01h Slot 2 config size 0 words, safe state size 1 word Octet 17–18: 0000h 1 safe state data word, safe state value for output points Octet 19–20: 1920h Slot 3 Module Key 1794-IE8 8-point analog input module Octet 21: 10h Slot 3 config size 1 word, safe state size 0 words Octet 22–23: 0000h 1 config word, channel selection Octet 24–25: 5121h Slot 4 Module Key 1794-OE4 4-point analog output module Octet 26: 24h Slot 4 config size 2 words, safe state size 4 words Octet 27–28: 0000h Octet 29–30: 0000h Octet 31–32: 0000h

Octet 33–34: 0000h output point 2

Octet 35–36: 0000h

Octet 37–38: 0000h

Octet 39–40: 0FFFFh Slot 5 empty Octet 41: 00h Slot 5 all sizes zero Octet 42–43: 0FFFFh Slot 6 empty Octet 44: 00h Slot 6 all sizes zero Octet 45–46: 0FFFFh Slot 7 empty Octet 47: 00h Slot 7 all sizes zero Octet 48–49: 0FFFFh Slot 8 Empty Octet 50: 00h Slot 8 all sizes zero

2 config words – channel selection and

output enable 4 safe state data words – safe state value for output point 1

output point 3

output point 4

Refer to the configuration example on page 4–11 to understand how

Information...

and where to enter this data.

Publication 1794-6.5.6 – April 1996

Configure the Adapter for Master/Slave Communication 4–8

Entering Check Configuration Data

On a PROFIBUS DP network, the I/O data exchanged between the PROFIBUS DP master and a DP slave is encapsulated into logical modules. The total I/O data exchanged between a PROFIBUS DP master and a DP slave device comprises a set of logical modules which is defined in the check configuration data.

Each physical slot of the FLEX I/O system is represented by two logical modules (one input and one output). When the FLEX I/O adapter is powered-up, the check configuration message configures the module format (input and output words) and defines the size of the modules within the device. When the sizes are configured, the I/O data can be optimized to remove unused data from the data stream.

Both input and output sizes can be configured. If a slot is empty, or if either the input or output module is zero length, the specific identifier for an empty module (free place) must be used.

If the end of the identifiers is reached before all slots have been configured, the remaining slots are configured as empty.

The first two modules allocated are for the adapter itself, and must always be a 1 word input module and a 1 word output module, regardless of what parameter format you choose. The adapter uses these words for adapter status information. Modules for each of the individual slots (FLEX I/O modules) must also follow these word assignments.

The format of the adapter status word is defined in the following table:

Adapter Status Word

Input Status Word

Bit Position Name Description

1–7 Reserved Sent as zeroes.

8–15 I/O Module

Bit Position Name Description

0–15 Reserved Sent as zeroes.

I/O Module Faults are caused by:

• transmission errors on the FLEX I/O backplane

•

bad module

• removed module

• incorrect module inserted

Address Change

Fault

This bit is set when the Node Address switch is changed since power up.

This bit is set when an error is detected in a slot position (bits 0–7 refer to slots 1–8)

Output Status Word

The adapter expects the identifier area for each of the eight FLEX I/O slots to be 2 bytes. The DP input/output identifier and all specific DP identifiers (except the empty module) are not supported.

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Configure the Adapter for Master/Slave Communication 4–9

The identifier byte and its format are described in the following illustration. This byte is defined in Part 3 of the PROFIBUS standard.

Most Significant Bit Least Significant Bit

Bit Number

concistency over 0 byte or word 1 whole length

length format 0 byte byte structure 1 word

When transferring words, PROFIBUS DP transfers the high byte first, followed by the low byte. If word structure is entered in the column format,

the DP master has the possibility to swap the bytes within the word, if required by the target system.

word structure

input/output 00 specific identifier formats 01 input 10 output 11 input–output

Length of data 00 1 byte resp.

•

15 16 byte resp.

1 word

16 words

The maximum size of this identifier area is 17 bytes. If no FLEX I/O modules are installed in the upper slots, the length may be less. Consistency must be over a word.

Check Configuration Example

Check Configuration Message when used with Send Parameter Auto

Name Identifier

Octet 1: 50h Input Status Word (input – 1 word) Octet 2: 60h Output Status Word (output – 1 word) Octet 3: 51h Slot 1, input module 2 words Octet 4: 60h Slot 1, output module 1 word Octet 5: 00h Slot 2, input module empty Octet 6: 60h Slot 2, output module 1 word Octet 7: 57h Slot 3, input module 8 words Octet 8: 60h Slot 3, output module 1 word Octet 9: 50h Slot 4, input module empty

Octet 10: 65h Slot 4, output module 6 words

Configure or Condensed Format (Length 10 bytes)

Description

Byte

I/O sizes configured: 22 input bytes, 20 output bytes

Information...

Refer to the configuration example on page 4–11 to understand how and where to enter this data.

Publication 1794-6.5.6 – April 1996

Configure the Adapter for Master/Slave Communication 4–10

Check Configuration Example

Check Configuration Message when used with Send Parameter Full

Name Identifier

Octet 1: 50h Status Word (input – 1 word)

Octet 2: 60h Output Status Word (output – 1 word) Octet 3: 51h Slot 1, input module 2 words Octet 4: 00h Slot 1, output module 1 word Octet 5: 00h Slot 2, input module empty Octet 6: 60h Slot 2, output module 1 word Octet 7: 57h Slot 3, input module 8 words Octet 8: 00h Slot 3, output module 1 word Octet 9: 00h Slot 4, input module empty

Octet 10: 63h Slot 4, output module 6 words

I/O sizes configured: 22 input bytes, 12 output bytes

Format (Length 10 bytes)

Description

Byte

Read

Configuration

Response Data

The read configuration message response returns the current configuration data. At power up, the configuration is the maximum read and write sizes supported by each FLEX I/O module.

A valid check configuration message updates the internal configuration. The updated internal configuration is then returned in the message response.

Power Up Configuration Example

Read Configuration Message response at Power Up (Length 10 bytes)

Name Identifier

Byte

Octet 1: 50h Status Word (input – 1 word) Octet 2: 60h Output Status Word (output – 1 word) Octet 3: 51h Slot 1, input module 2 words Octet 4: 60h Slot 1, output module 1 word Octet 5: 50h Slot 2, input module empty Octet 6: 61h Slot 2, output module 1 word Octet 7: 58h Slot 3, input module 8 words Octet 8: 65h Slot 3, output module 1 word Octet 9: 50h Slot 4, input module empty

Octet 10: 65h Slot 4, output module 6 words

Description

Publication 1794-6.5.6 – April 1996

Information...

Refer to the configuration example on page 4–11 to understand how and where to enter this data.

Configure the Adapter for Master/Slave Communication 4–11

Configuration Example Using PROFIBUS Manager Software

Information...

If you are using the Allen-Bradley PROFIBUS Manager configuration software, follow this example to understand how to access and enter data. This example is a User Parameter Message, Full Format.

For more detailed information on configuring your network, refer to your PROFIBUS Manager User Manual, publication 1785-6.5.20.

If you are using another configuration tool, how you access and enter data is similar, however, refer to the user documentation supplied with that tool.

The directions in this example assume you have the software installed and have constructed a DP network containing at least one 1794-APB FLEX I/O PROFIBUS adapter module.

User Parameter Example

User Parameter Message, Full Format (Length 43 bytes)

Name Value Description

Octet 33–34: 0000h

Octet 35–36: 0000h output point 3

Octet 37–38: 0000h output point 4

2 config words – channel selection and

output enable 4 safe state data words – safe state value for output point 1

output point 2

Publication 1794-6.5.6 – April 1996

Configure the Adapter for Master/Slave Communication 4–12

1. In your network, double-click on .

• Double-click here

You see the

1794-APB Device Parameters

screen which

indicates a User Parameter Data Length of 237:

• Change to 43

2. Change the User Parameter Data Length to 43.

Publication 1794-6.5.6 – April 1996

Configure the Adapter for Master/Slave Communication 4–13

3. Double-click on

The defaults are zero (0) until you enter specific data

You see the

User Parameter Data

screen:

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Configure the Adapter for Master/Slave Communication 4–14

4. Enter the Condensed Format data values as shown in the User

Parameter example:

User Parameter Example

User Parameter Message, Full Format (Length 43 bytes)

Name Value Description

Octet 33–34: 0000h

Octet 35–36: 0000h output point 3

Octet 37–38: 0000h output point 4

2 config words – channel selection and

output enable 4 safe state data words – safe state value for output point 1

output point 2

Octet 9: 02

Octet 10: 81

Octet 8: 02

Publication 1794-6.5.6 – April 1996

Octet 11: 10

Octet 12: 00

Octet 13: 00

Octet 14: 01

Octet 15: 91

Octet 16: 01 (and so on for remaining values)

Configure the Adapter for Master/Slave Communication 4–15

5. After you enter all octet values, click

6. In the

1794-APB Device Parameters

You see the Modules Information screen:

screen, click

7. Highlight each of the possible modules in the Possible Modules

column, then click on

. Repeat this for the four FLEX

I/O modules in the example. Also add 1794-APB Status (counts as one module) and three Flex I/O empty slot modules. All eight slots must be accounted for.

Notice as you add each module, the Module Configuration status appears:

8. If you want to edit the configuration of a module, highlight the

module and click on

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Configure the Adapter for Master/Slave Communication 4–16

9. After you account for all module slots in the example, the Modules Information screen should look similar to this:

All module slots in the example are accounted for.

Information...

10.Click

For more detailed information on configuring your network, refer to your PROFIBUS Manager User Manual, publication 1785-6.5.20.

Publication 1794-6.5.6 – April 1996

Troubleshooting

Chapter 5

What

this Chapter Contains

roubleshooting with the

Indicators

STATUS indicator (green/red)

PROFIBUS indicator (green/red)

In this chapter, we describe how to use the adapter’s indicators for troubleshooting.

Locate the two bi-color indicators on the front panel of the adapter. They show both normal operation and fault conditions in your Flex I/O PROFIBUS system. The indicators are:

• STATUS – this indicator provides device status

• PROFIBUS – this indicator provides communication link status

Use the following table to determine the indicator conditions and status.

STATUS Indicator

Indication Status

OFF Solid Green Normal operation Flashing Red/OFF Recoverable fault

Solid Red Unrecoverable fault

No power

– Flex I/O module bad – Incorrect Flex I/O module installed – Node address changed since

power up

PROFIBUS Indicator

Indication Status

OFF No power or no communication Solid Green Data is being transmitted and recieved Flashing Red/OFF Recoverable fault

– Invalid Send Parameter data – Invalid Check Configuration data

Solid Red Unrecoverable fault

– Unable to communicate

Publication 1794-6.5.6 – April 1996

Troubleshooting 5–2

Viewing Status from the Master’

s Configuration

Software

You can use read diagnostics to view status using the master’s configuration software. The adapter returns identification in response to the Read DP–Slave Diagnostic Information message.

Read DP–Slave Diagnostics Information Message

Ext_Diag_Data field (Length 9 bytes)

Octet Description

7 Device Related diagnostic header byte (05h) 8 Revision – Minor 9 Revision – Major

10 Adapter Status

Bit 0 – Node Address Changed Bits 1-7 – Reserved

11 Node Address switch setting

12 Identifier Related diagnostic header byte (44h)

13–15 Identifier diagnostic bits

One identifier bit for each logical module (adapter and each slot use

two identifier bits). The bits set indicate a module fault.

Publication 1794-6.5.6 – April 1996

Appendix A

Specifications

1794-APB Flex I/O PROFIBUS Adapter Specifications

I/O Capacity 8 modules

Input Voltage Rating 24V dc nominal

Input Voltage Range 19.2V to 31.2V dc (includes 5% ac ripple)

Communication Rate All rates up to 1.5Mbit/s

Indicators STATUS LED – red/grn

PROFIBUS LED – red/grn

Flexbus Output Current 640mA maximum @ 5V dc

Isolation Voltage 100% tested at 850V dc for 1s between user

power and flexbus

Power Consumption 400mA maximum from external 24V dc

Power Dissipation 7.68W maximum @ 19.2V dc

Thermal Dissipation 26 BTU/hr @ 19.2V dc

Environmental Conditions

Operational Temperature Storage Temperature Relative Humidity Shock Operating

Vibration

PROFIBUS Connector

PROFIBUS Drop Cable Standard Drop Cable

Power Conductors

Agency Certification (when product or packaging is marked)

Use

this conductor category information for planning conductor routing. Refer to publication 1770-4.1,

“Industrial Automation Wiring and Grounding Guidelines.”

Non-operating

Wire Size

What this Chapter Contains

Software diskette with GSD file

;============================================================ ; Profibus Device Database of : ; Allen–Bradley DP slave ; Model : 1794–APB/A Revision Series A Rev. 1.0 ; Description : Flex I/O Profibus adapter ; Language : English ; Date : 15 February 1996 ; Author : Allen–Bradley ;============================================================

This chapter contains an example of the device data base (GSD) file for the 1794-APB Adapter.

This file is included on the software diskette you received with your shipment of the FLEX I/O adapter. The GSD file is used by your configuration tool to help you set up your system. Your configuration tool automatically reads the GSD file and extracts defaults used in the data exchange.

The file is in ASCII format and you can view it with any text editor. A printed copy of your GSD file appears below.

This device data base file changes when new FLEX I/O modules are introduced. When you add new modules to your system, contact your local Allen-Bradley representative for the latest version of this file.

#Profibus_DP

AB_GSD_Revision = ”1.0”

; Device identification Vendor_Name = ”Allen–Bradley” Model_Name = ”1794–APB/A” Revision = ”Series A Rev. 1.0” Ident_Number = 0x1101 Protocol_Ident = 0 ; DP protocol Station_Type = 0 ; Slave device FMS_supp = 0 ; FMS not supported Hardware_Release = ”Series A” Software_Release = ”Rev. 1.0”

Publication 1794-6.5.6 – April 1996

Device Data Base File B–2

; Supported baudrates

9.6_supp = 1

19.2_supp = 1

93.75_supp = 1

187.5_supp = 1 500_supp = 1

1.5M_supp = 1 3M_supp = 0 6M_supp = 0 12M_supp = 0

; Maximum responder time for supported baudrates MaxTsdr_9.6 = 60 MaxTsdr_19.2 = 60 MaxTsdr_93.75 = 60 MaxTsdr_187.5 = 60 MaxTsdr_500 = 100 MaxTsdr_1.5M = 150

; Supported hardware features Redundancy = 0 ; not supported Repeater_Ctrl_Sig = 0 ; not connected 24V_Pins = 0 ; not connected

; Supported DP features Freeze_Mode_supp = 0 Sync_Mode_supp = 0 Auto_Baud_supp = 1 ; supported Set_Slave_Add_supp = 0

; Maximum Length of User Parameter User_Prm_Data_Len = 237

; Default User Parameter string : ; Autoconfigure, Reset to Zero, Reset inputs to zero User_Prm_Data = 0x00

; Maximum polling frequency Min_Slave_Intervall = 10 ; 10*100 ¶s => 1 millisecond

; Maximum supported sizes Modular_Station = 1 ; modular Max_Module = 9 ; physical modules = slots Max_Input_Len = 244 Max_Output_Len = 244 Max_Data_Len = 488

; Meaning of ”device diagnostic” field

Publication 1785-6.5.15 – November 1995

Device Data Base File B–3

;Firmware revisions of device Unit_Diag_Area = 0–15 Value (1) = ”Firmware Rev. : 1.0” Unit_Diag_Area_End

Unit_Diag_Bit (16) = ”Node address changed”

;The following byte (corresponding to Unit_Diag_Area = 24–31) contains ;the current setting of the node address switch. ;Please look at the user manual (section ”Troubleshooting”) for a detailed ;explanation about the meaning of these bytes.

; Definition of all available physical modules ;============================================================

; Empty slot for Flex I/O (2 configuration bytes per slot) Module = ”Flex I/O empty slot” 0x00, 0x00 EndModule

; Flex I/O adapter status (must be the first module in config, 1 word in, 1 word out) Module = ”1794–APB Status” 0x50, 0x60 EndModule

; Definition of modules for autoconfigure and condensed formats ;============================================================

; Flex I/O module 1794–IB16, 16–point Discrete Input Module (default config= 1 word in, 1 word out) Module = ”1794–IB16” 0x50, 0x60 EndModule

; Flex I/O module 1794–OB16, 16–point Discrete Output Module (default config= 0 word in, 1 word out) Module = ”1794–OB16” 0x00, 0x60 EndModule

; Flex I/O module 1794–IB8S, 8–point Discrete Sensor Input Module (default config= 1 word in, 1 word out) Module = ”1794–IB8S” 0x50, 0x60 EndModule

; Flex I/O module 1794–IA8, 8–point Discrete Input Module (default config= 1 word in, 1 word out) Module = ”1794–IA8” 0x50, 0x60 EndModule

; Flex I/O module 1794–OA8, 8–point Discrete Output Module (default config= 0 word in, 1 word out) Module = ”1794–OA8” 0x00, 0x60 EndModule

Publication 1785-6.5.15 – November 1995

Device Data Base File B–4

; Flex I/O module 1794–OW8, 8–point Discrete Relay Output Module (default config= 0 word in, 1 word out) Module = ”1794–OW8” 0x00, 0x60 EndModule

; Flex I/O module 1794–IE8, 8 Input Analog Module (default config= 9 words in, 1 word out) Module = ”1794–IE8” 0x58, 0x60 EndModule

; Flex I/O module 1794–OE4, 4 Output Analog Module (default config= 1 word in, 6 words out) Module = ”1794–OE4” 0x50, 0x65 EndModule

; Flex I/O module 1794–IE4XOE2, Analog Combo Module (default config= 5 words in, 4 words out) Module = ”1794–IE4XOE2” 0x54, 0x63 EndModule

; Flex I/O module 1794–IR8, RTD Input Analog Module (default config= 11 words in, 3 words out) Module = ”1794–IR8” 0x5A, 0x62 EndModule

; Flex I/O module 1203–FM1, Flex I/O SCANport Module 1 (default config= 6 words in, 5 words out) Module = ”1203–FM1” 0x55, 0x64 EndModule

; Definition of modules for full format ;============================================================

; Flex I/O module 1794–IB16, 16–point Discrete Input Module (default config= 1 word in, 0 word out) Module = ”1794–IB16/full format” 0x50, 0x00 EndModule

; Flex I/O module 1794–OB16, 16–point Discrete Output Module (default config= 0 word in, 1 word out) Module = ”1794–OB16/full format” 0x00, 0x60 EndModule

; Flex I/O module 1794–IB8S, 8–point Discrete Sensor Input Module (default config= 1 word in, 0 word out) Module = ”1794–IB8S/full format” 0x50, 0x00 EndModule

; Flex I/O module 1794–IA8, 8–point Discrete Input Module (default config= 1 word in, 0 word out) Module = ”1794–IA8/full format” 0x50, 0x00 EndModule

Publication 1785-6.5.15 – November 1995

Device Data Base File B–5

; Flex I/O module 1794–OA8, 8–point Discrete Output Module (default config= 0 word in, 1 word out) Module = ”1794–OA8/full format” 0x00, 0x60 EndModule

; Flex I/O module 1794–OW8, 8–point Discrete Relay Output Module (default config= 0 word in, 1 word out) Module = ”1794–OW8/full format” 0x00, 0x60 EndModule

; Flex I/O module 1794–IE8, 8 Input Analog Module (default config= 9 words in, 0 word out) Module = ”1794–IE8/full format” 0x58, 0x00 EndModule

; Flex I/O module 1794–OE4, 4 Output Analog Module (default config= 1 word in, 4 words out) Module = ”1794–OE4/full format” 0x50, 0x63 EndModule

; Flex I/O module 1794–IE4XOE2, Analog Combo Module (default config= 5 words in, 2 words out) Module = ”1794–IE4XOE2/full format” 0x54, 0x61 EndModule

; Flex I/O module 1794–IR8, RTD Input Analog Module (default config= 11 words in, 0 words out) Module = ”1794–IR8/full format” 0x5A, 0x00 EndModule

; Flex I/O module 1203–FM1, Flex I/O SCANport Module 1 (default config= 4 words in, 3 words out) Module = ”1203–FM1/full format” 0x53, 0x62 EndModule

; Profibus Manager specific parameters AB_Icon_File = ”res\flex.ico” AB_Bitmap_File = ”res\flex.bmp” AB_Attach_Offset = 32 AB_Description = ”Allen–Bradley Flex I/O Profibus adapter”

;============================================================

Publication 1785-6.5.15 – November 1995

Device Data Base File B–6

Publication 1785-6.5.15 – November 1995

Glossary

This Glossary contains terms specific to Allen-Bradley and PROFIBUS FMS and DP.

Allen-Bradley communication defaults

values used for communication configuration data such as OD, CRL ( for FMS) DP slave database,and bus parameters whenever the coprocessor’s working RAM configuration is reinitialized.

application layer

the seventh layer of the seven-layer OSI reference model. This layer is where the coprocessor first interacts with the application program.

baud rate

the speed of communication between devices on the network. All devices must communicate at the same rate.

broadcast relationships

allow transmission of messages to all nodes simultaneously, but only unconfirmed services are available.

bus parameters

communication parameters used by Link Layer. Main Bus Parameters are station address, maximum address and baud rate. These can be changed using the Local Station Manager or PROFIBUS Manager.

client

the FMS device that makes use of resources to perform some type of application function.

in FMS, terminates the connection with a remote node on the network.

communication

describes the externally visible behavior associated with an FMS service or group of services. Three types of communication object models are domain objects, program invocation objects and variable objects.

CREF

communication reference. In FMS, an index assigned to each entry connection defined in the CRL.

CSTAT

a qualifier that allows to save the status of a connection.

communication parameters

parameters within the PROFIBUS communication layers that control the communication process. They are used to configure and indicate current status of communication and consist of the OD, CRL, bus parameters for FMS, and slave database and bus parameters for DP.

command

object model

Publication 1794-6.5.6 – April 1996

GlossaryGB–2

communication relationship

in FMS, defines all the parameters for the communication between two nodes.

configuration management

in FMS, set of FMA 7 services to upload and download the PROFIBUS bus parameters, CRL, and to read SAP status and station identification.

connector header

a connector that attaches between the processor and coprocessor and provides communication between the two modules.

connection type

in FMS, the type of connection between two nodes. There are three connection types: defined (D), open at the responder (O), and open at the initiator (I)

connection zero

opens automatically during the coprocessor’s power-up and allows access to local data either by physical addressing or via objects defined locally in the OD.

consistency

the DP protocol allows to associate data consistency requirements with blocks of data exchanged between a PLC master and its slaves. A consistent block of data must always be written or read as a whole, because contained data is not independent. For example, when it holds both real data and data identification, or when granularity exceeds 2 bytes (e.g. floating point data).

context management

set of FMA 7 services that establishes and releases connections

coprocessor

the 1785-PFB/B PROFIBUS Coprocessor module

CRL

Communication Relationship List. In FMS, a CRL is a database within the station, holding the description of all communication relationships of that station to all other stations, independent of the time of use. For more information on CRLs, refer to DIN 19245 Part 2: Process Field Bus.

default settings

values used for communication configuration data such as OD, CRL ( for FMS) DP slave database,and bus parameters whenever the coprocessor’s working RAM configuration is reinitialized.

Publication 1794-6.5.6 – April 1996

Glossary GB–3

defined connection

in FMS, a connection type that specifies both end nodes of the channel by giving their network address and the FDL service access points (SAPs) used in both nodes

diagnostics

three LED indicators located on the front panel of the coprocessor provide the user with the status of the coprocessor and its communication channels. Also referred to as user interface.

domain object

in FMS, represents a portion of the processor’s memory image. In the coprocessor, represents the processor’s entire memory image.

DIN

Deutsches Institut fur Normung. The German Normalization Agency.

Decentralized Periphery

. A German/European standard (DIN 19245 Part 3) that specifies a simplified user interface with PROFIBUS link layer services and protocol to use with decentralized peripherals.

DP interface

a 9-pin female D-shell connector located at Port 2 on the front panel of the coprocessor.

European Community 1996. European Union Directives for

1996.

EMC

Electro-magnetic Compatibility.

ESD

Electrostatic Discharge. Can cause internal circuit damage to the coprocessor.

FDL

Fieldbus Data Link. A German standard (DIN 19245 Part 1) that specifies the Data Link layer of the PROFIBUS fieldbus.

FMA

Fieldbus Management. A German standard (DIN 19245 Parts 1 and 2) that specifies the network management services and protocol of the PROFIBUS fieldbus.

FMS

Fieldbus Message Specification. A German standard (DIN 19245 Part 2) that specifies the Application Layer services and protocol of the PROFIBUS fieldbus.

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GlossaryGB–4

FMS interface

a 9-pin female D-shell connector located at Port 1 on the front panel of the coprocessor.

FMS Physical Access Addressing

FMS option that allows the access of data at a physical address by specifying the address in the service.

Symbolic Access Addressing

FMS

FMS option that allows to statically associate a symbolic name or short reference number (or index) with a physical address within a node.

fault management

set of FMA 7 services that allows resetting the communication and indicates communication faults and events

HPRIO

High Priority service request. A qualifier to specify high priority for unconfirmed services such as UINFO and USTAT.

I/O chassis

the chassis or rack that serves as the location for the processor, coprocessor, power supply and other I/O modules. Also referred to as chassis.

LED

Light-emitting diode.

link layer

defines a hybrid method for accessing the communication medium (bus) with master/active stations or slave/passive stations.

Local Station Manager

an Allen-Bradley PC program that runs under Microsoft Windows version 3.1. This program transfers data (FDL,CRL, OD, station address, communication rate, and maximum station address) between the PC and the coprocessor over RS-232.

module

logical

DP protocol describes I/O data exchanged between a PLC master and a slave device as a set of logical modules (up to 64, but 32 preferred) each one featuring up to 16 bits maximum of inputs, outputs or a combination of both. The actual structure of exchanged input and output frames is deduced from this description.

Publication 1794-6.5.6 – April 1996

lower layer interface (LLI)

in FMS, responsible for interfacing the FMS layer 7 with FDL layer 2. LLI manages connections

Glossary GB–5

LSAP

or SAP

Link layer Service Access Point. A logical sub-addresses within devices that allow the distribution of communication flow over dedicated tasks, depending on the required processing. FMS uses LSAPs indifferently to define generic communication relationships between two devices (logical communication channels). DP uses predefined LSAPs to access specific functions or services between masters and slaves.

master

initiates transfer of messages without any prior remote request. The right to access the bus (token) is circulated among the master stations. Management of this logical token ring is performed automatically by the masters (such as startup, removal or insertion of masters). Also referred to as active stations or scanner.

module

any of the plug-in hardware devices that are located in the 1771 I/O chassis: processor, coprocessor, power supply or I/O module

module

slot

location in the I/O chassis for installing a module. Each module slides into a module slot that lines up with the backplane connector

. Also referred to as slot.

multicast relationships

allow transmission of messages to a group of nodes simultaneously, but only unconfirmed services are available.

network

a series of stations or nodes connected by some type of communication medium. A network may consist of a single link or multiple links.

node

an address or software location on the network. Also referred to as node.

STATUS

LED

a bicolor LED, located on the front panel of the coprocessor that indicates the condition of the coprocessor

Object Dictionary. In FMS, an OD is a database within the station, holding the description of all explicit communication objects of that station and making them available for control and monitoring.

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GlossaryGB–6

open at the initiator

in FMS, a connection type where the source service access point (SAP) is shared among several communication relationships (associated with a different destination address and SAP). The device uses only one of these relationships at a time, depending on the selected remote node.

open at the responder

in FMS, a connection type where the destination address and service access point (SAP) are undefined, thus making the connection available to any device.

command

OPEN

in a MSG instruction, establishes a connection between the coprocessor and a remote node on the network

OSI

Open Systems Interconnect. A standard that provides the framework for defining the process of communication between nodes on the PROFIBUS network.

physical layer

The first layer of the seven-layer OSI reference model. This layer is where the coprocessor connects to the network media.

PICS

Protocol Implementation Conformance Statement. System conformance requirements associated with network communications, consisting of four parts: implementation and system information, supported services, supported parameters and their options, and local implementation values

PLC-5 processor

Any one of the family of Allen-Bradley Programmable Logic Controllers that support the coprocessor interface: PLC-5/11

, -5/20 , -5/30 , -5/40 , -5/60 and -5/80 .

PNO

PROFIBUS Nutzerorganisation, or PROFIBUS User Organization.

1 LED

PORT

a bicolor LED, located on the front panel of the coprocessor that indicates the condition of the FMS communication channel of the coprocessor

2 LED

PORT

a bicolor LED, located on the front panel of the coprocessor that indicates the condition of the DP communication channel of the coprocessor

Publication 1794-6.5.6 – April 1996

Glossary GB–7

power

supply

module that supplies power to the I/O chassis containing the processor and coprocessor and other modules

processor

Any one of the family of Allen-Bradley Programmable Logic Controllers that support the coprocessor interface: PLC-5/11

, -5/20 , -5/30 , -5/40 , -5/60 and -5/80 .

processor interface

a 58-pin connector located on the left side of the coprocessor that uses a PLC-5 Connector Header to attach to the processor for communication between the two modules.

PROFIBUS

PROcess FIeld BUS. A German standard (DIN 19245 Parts 1, 2 and 3) that specifies a fieldbus for communications at the process level.

PROFIBUS Manager

an Allen-Bradley PC program that runs under MicrosoftR Windows version 3.1. This program allows you to create, download and monitor network FMS and DP configurations on your personal computer through an RS-232 interface to your coprocessor.

program invocation objects

allow an FMS client to place the processor into different modes (for example, program, test, run)

protocol

the language or packaging of information that is transmitted between nodes on a network.

qualifier

in a MSG instruction, a word that specifies options for an MSG command

RFI

Radio Frequency Interference.

RS-232

communication protocol between the personal computer and the coprocessor

RS-232 interface

a 9-pin male D-shell connector located at the RS-232 port on the front panel of the coprocessor. Use this interface to connect the Local Station Manager and PROFIBUS Manager installed in your personal computer.

server

an FMS device that makes resources available for use by another FMS device. Also referred to as slave.

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GlossaryGB–8

station

an address or software location on the network. Also referred to as node.

command

SET

in a MSG instruction, allows transfer of an element, an array of elements or an FMS structure to or from a node on the network.

slave

are only allowed to transmit immediate acknowledge or immediate response to master requests. At the Link Layer level, any master can access any slave without restrictions. Also referred to as passive stations or adapters.

STATUS

command

in a MSG instruction, retrieves status information from a remote node and stores it locally.

system parameters

allow you to check the current state of the coprocessor

third party multivendor configurator

a remote software tool used to define connections between devices and their communication parameters on the network. The tool is available on the open market from many vendors.

command

UINFO

Unsolicited Variable Information. In a MSG instruction, a command that sends unsolicited data such as an element, array of elements or predefined FMS structure.

command

USTAT

Unsolicited Status Information. In a MSG instruction, a command that sends unsolicited status information such as an element, array of elements or predefined FMS structure.

user interface

three LED indicators located on the front panel of the coprocessor provide the user with the status of the coprocessor and its communication channels. Also referred to as diagnostics.

Publication 1794-6.5.6 – April 1996

variable objects

data that can be accessed from the network within an FMA server.

VFD

Virtual Field Device. A portion of the FMS server application process that makes a set of resources (data files, program files, I/O) and their associated functionality available for control and monitoring. For more information on VFDs, refer to DIN 19245 Parts 1 and 2: Process Field Bus.

Index

Numbers

1794–APB

FLEX I/O PROFIBUS Adapter

Module.

See adapter

adapter

accessories, 1–2 backplane communication, 2–1 components, 1–6 connect to the network, 3–4 data exchange, 1–5 dimensions and spacing requirements,

1–4 I/O structure, 2–2 installing, 1–7 LED indicators, 1–6 major components, 1–6 module overview mounting and removing, 1–2 network connector node address switches, 1–7 purpose, 1–5 read and write words, 2–1 specifications, A–1 wiring, 1–7

adapter input status word, 2–2

adapter output status word, 2–2

adapter status word

I/O module faults, 4–9 input, 4–9 output, 4–9

adapter/power supply

analog mapping

1794-IE4XOE2, 2–14 1794-OE4, 2–1

auto configure format, 4–4

, 1–5

, 1–7

, 1–1

baudrates, 3–1

Belden, drop cable, 3–2, 3–3

bit/word description

block transfer write, 1794-IE8, 2–10 R

TD analog module, 1794-IR8, 2–17

thermocouple input module, 1794-IT8,

2–21

block transfer read, 1794-IR8, 2–17, 2–20

block transfer write

1794-IR8, 2–17, 2–21 configuration block, 1794-IR8, 2–21

bus interface, 1–1

CE mark, –3

check configuration, example, 4–10

check configuration data, 4–1, 4–8

logical modules, 4–8

communication, master/slave, 4–1

component dimensions, 1–4

components, hardware, 1–6

condensed format, 4–4

connecting to network, 3–4

conventions, –2

default values, 2–24

description, Flex I/O system, 1–1

device data base file, 4–1

in communication process, B–1 printed example, 4–1

diagnostic indicators, 1–6, 5–1

dimensions

components, 1–4 system, 1–4

DIN rail

mounting, 1–2 proper size, 1–2

discrete mapping

1794-IB16, 2–4 1794-IA8, 2–7 1794-IB8S, 2–6 1794-OA8, 2–7 1794-OB16, 2–5 1794-OW8, 2–8

documentation

ordering, –2 related, –2

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IndexI–2

baudrates, network connector network media specifications, 3–1 physical layer

3–1

, 1–6

, 3–1

Electromagnetic Capability

EMC directive, –3

European Union directives, –3

extender cable, 1–2

, –3

flags byte, 4–3

FLEX I/O

adapter

, purpose, 1–5 backplane communication, 2–1 components

adapter, 1-1 I/O module, 1-1 terminal base, 1-1

extender module defaults, 2–24 mounting dimensions, 1–4 mounting kit, 1–3 optional accessories, 1–2 panel–mounting, 1–3 spacing requirements, 1–4 system configuration example, 1–5 system overview wall–mounting, 1–3

FLEX I/O, related documentation, –2

Flex I/O, system mounting, 1–2

flexbus connector

full format, 4–6

cable, 1–2

, 1–1

, 1–6

GSD file, 4–1

in communication process, B–1 printed example, B–1

horizontal mounting, 1–2

I/O

data exchange, 1–5 module defaults, 2–24 module faults, 2–3 structure, 2–2

identifier byte, 4–10

image table mapping, 2–4

indicators, diagnostic, 1–6, 5–1

input status word, 2–3, 4–9

installing, adapter

, 1–7

LED indicators, 1–6

line A

bus connector cables, 3–2 connectors, 3–2 termination blocks, 3–2 termination of, 3–6

line A and B types, 3–1

line B

bus connector cables, 3–3 connectors, 3–3 termination blocks, 3–3 termination of, 3–6

line length, 3–1

line types

line A, 3–2 line B, 3–3

logical modules, in the check configuration

data, 4–8

low voltage directive, –3

, 3–2

, 3–3

Publication 1794-6.5.6 – April 1996

Index

I–3

mapping

1794-IB16, 1794-IA8, 2–7 1794-IB8S, 2–6 1794-IE4XOE2, 2–14 1794-IR8, 2–16 1794-IT8, 2–20 1794-OA8, 2–7 1794-OB16, 2–5 1794-OE4, 2–1 1794-OW8, 2–8 example, 2–2 explanation, 2–1 image table, 2–4

master/slave communication, 4–1

maximum line length, 3–1

memory map

1794-IE4XOE2, 2–14 1794-IE8, 2–9

module key parameter

mounting FLEX I/O system, 1–2

mounting kit, 1–3

2–4

, 4–4

network

connecting to PROFIBUS, 3–4 termination of, 3–6

network address switch, 1–7

network connector

network media, 3–1

node address changed bit, 2–4

, 1–6, 1–7

octets, 4–2

optimal defaults, 2–24

output status word, 4–9

powerup defaults, 2–24

PROFIBUS indicator

PROFIBUS Manager Software, 4–1

publications

ordering, –2 related, –2

, 5–1

range selection, 1794-OE4, 2–12

read configuration message, 4–1

read diagnostics, 5–2

read DP slave diagnostics, 5–2

read words, 2–1

real time sizes, 2–24

related publications, –2

TD analog input mapping, 1794-IR8, 2–16

send parameter data, 4–2

data table, 4–2 octets, 4–2

setting, network address, 1–7

sizes, real time, 2–24

software configuration tool, 4–1

using for status, 5–2

specifications, adapter

Sprecher + Schuh

bus connector cables, 3–2, 3–3 connectors, 3–2, 3–3 termination blocks, 3–2, 3–3

STATUS indicator

system dimensions, 1–4

, A–1

, 3–2, 3–3

, 5–1

physical layer

polled I/O structure, example, 2–2

power supply

power wiring, 1–7

, 3–1

, 1–1

terminal strip, 1–1

termination blocks, using, 3–6

thermocouple input mapping, 1794-IT8,

2–20

troubleshooting, 5–1

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IndexI–2

user

parameter data, 4–1 auto configure format, 4–4 condensed format, 4–4 flags byte, 4–3 formats, 4–2 full format, 4–6

vertical mounting, 1–2

wiring, 1–7

adapter

, 1–7

wiring connection terminals, 1–6

wiring connections, adapter to drop cable,

3–5

word bit descriptions, input status, 2–3

write words, 2–1

Publication 1794-6.5.6 – April 1996

Worldwide representation.

Allen-Bradley, a Rockwell Automation Business, has been helping its customers improve productivity and quality for more than 90 years. We design, manufacture and support a broad range of automation products worldwide. They include logic processors, power and motion control devices, operator interfaces, sensors and a variety of software. Rockwell is one of the worlds leading technology companies.

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Publication 1794-6.5.6 – April 1996

1996 Allen-Bradley Company

PN 955122-57

, Inc. Printed in USA

Allen-bradley Flex I-O User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Important User Information

Preface

Purpose

Vocabulary

Related Publications

Conventions

Table of Contents

The FLEX I/O System

Mount and Remove your System Easily

Optional Accessories

Mounting Dimensions and Spacing Requirements

Purpose of the 1794-APB FLEX I/O Adapter

PROFIBUS Adapter Components

Communication Over the I/O Backplane

Polled I/O Structure

Defaults

The DP Physical Layer

Connect the Adapter to the Network

Terminate the Network

How Master/Slave Communication Takes Place

Entering User Parameter Data

Entering Check Configuration Data

Configuration Example Using PROFIBUS Manager Software

What this Chapter Contains

Glossary

Index