Rockwell Automation 1790D-NOV2, 1790DTNOV2 User Manual

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CompactBlock LDX Analog Modules

1790D-N4CO/TN4CO,

-N4VO/TN4VO, -NOC2/TNOC2,

-NOV2/TNOV2, 1790P-TN4CO,

-TNOC2

User Manual

Important User Information

Because of the variety of uses for the products described in this publication, those responsible for the application and use of these products must satisfy themselves that all necessary steps have been taken to assure that each application and use meets all performance and safety requirements, including any applicable laws, regulations, codes and standards. In no event will Allen-Bradley be responsible or liable for indirect or consequential damage resulting from the use or application of these products.

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

Allen-Bradley publication SGI-1.1, Safety Guidelines for the

Application, Installation and Maintenance of Solid-State Control

(available from your local Allen-Bradley office), describes some important differences between solid-state equipment and electromechanical devices that should be taken into consideration when applying products such as those described in this publication.

Reproduction of the contents of this copyrighted publication, in whole or part, without written permission of Rockwell Automation, is prohibited.

Throughout this publication, notes may be used to make you aware of safety considerations. The following annotations and their accompanying statements help you to identify a potential hazard, avoid a potential hazard, and recognize the consequences of a potential hazard:

WARNING

Identifies information about practices or circumstances that can cause an explosion in a hazardous environment, which may lead to personal injury or death, property damage, or economic loss.

ATTENTION

Identifies information about practices or circumstances that can lead to personal injury or death, property damage, or economic loss.

IMPORTANT

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

Rockwell Automation Support

Before you contact Rockwell Automation for technical assistance, we suggest you please review the troubleshooting information contained in this publication first.

If the problem persists, call your local distributor or contact Rockwell Automation in one of the following ways:

Phone United

States/Canada

Outside United States/Canada

Internet

⇒

1.440.646.5800

You can access the phone number for your country via the Internet:

1. Go to http://www.ab.com

2. Click on Product Support (http://support.automation.rockwell.com)

3. Under Support Centers, click on Contact

Information

1. Go to http://www.ab.com

2. Click on Product Support (http://support.automation.rockwell.com)

Your Questions or Comments on this Manual

If you find a problem with this manual, please notify us of it on the enclosed How Are We Doing form.

Preface

Read this preface to familiarize yourself with the rest of the manual. This preface covers the following topics:

• who should use this manual

• how to use this manual

• related publications

• conventions used in this manual

• Rockwell Automation support

Who Should Use This Manual

How to Use This Manual

Use this manual if you are responsible for designing, installing, programming, or troubleshooting control systems that use Allen-Bradley CompactBlock LDX modules.

As much as possible, we organized this manual to explain, in a task-by-task manner, how to install, configure, program, operate and troubleshoot a control system using the 1790D analog I/O modules.

Manual Contents

If you want... See

An overview of the analog input and output modules Chapter 1

Installation and wiring guidelines Chapter 2

Input module addressing, configuration and status information Chapter 3

Output module addressing, configuration and status information Chapter 4

Information on module diagnostics and troubleshooting Chapter 5

Specifications for the input and output modules Appendix A

PROFIBUS information Appendix B

Definitions of terms used in this manual Glossary

1 Publication 1790-UM001A-EN-P - March 2002

Preface 2

Conventions Used in This Manual

Publication 1790-UM001A-EN-P - March 2002

The following conventions are used throughout this manual:

• Bulleted lists (like this one) provide information not procedural

steps.

• Numbered lists provide sequential steps or hierarchical

information.

• Italic type is used for emphasis.

• Text in this font indicates words or phrases you should type.

Overview

Installation and Wiring

Chapter 1

How to Use Analog I/O . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Hardware Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

General Diagnostic Features . . . . . . . . . . . . . . . . . . . . . 1-4

System Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

System Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Module Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

Chapter 2

Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Module Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Prevent Electrostatic Discharge . . . . . . . . . . . . . . . . . . . 2-2

Environmnet and Enclosure . . . . . . . . . . . . . . . . . . . . . 2-2

Remove Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

General Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

Reducing Noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

Protecting the Circuit Board from Contamination. . . . . . 2-3

Installing CompactBlock LDX I/O . . . . . . . . . . . . . . . . . . . 2-4

Set the Node Address on the Base Block . . . . . . . . . . . 2-4

Mount the Base Block . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

Mount the Optional Expansion Blocks . . . . . . . . . . . . . 2-6

Connect the DeviceNet Cable . . . . . . . . . . . . . . . . . . . . 2-7

I/O System Wiring Guidelines . . . . . . . . . . . . . . . . . . . . . . 2-8

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

Input Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

Output Modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

Effect of Transducer/Sensor and Cable Length

Impedance on Voltage Input Accuracy . . . . . . . . . . . . . 2-9

Effect of Device and Cable Output Impedance

on Output Module Accuracy. . . . . . . . . . . . . . . . . . . . . 2-11

Wiring the Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13

1790D-N4C0, 1790D-N4V0 Analog 4 Input Base D-Shell

Modules Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15

1790D-TN4C0, 1790D-TN4V0 Analog 4 Input Base Modules

Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16

1790D-N0C2, 1790D-N0V2 Analog 2 Output Base D-Shell

Modules Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17

1790D-TN0C2, 1790D-TN0V2 Analog 4 Input Base Modules

Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18

i Publication 1790-UM001A-EN-P - March 2002

Table of Contents ii

Module Data, Status, and Channel Configuration for Analog Input Modules

Module Data, Status, and Channel Configuration for Analog Output Modules

Chapter 3

Analog Input Image . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Analog Input Data File . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Analog Input Data File With Discrete Input Expansion

Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Analog Input Data Format . . . . . . . . . . . . . . . . . . . . . . . . . 3-7

Configuring Analog Input Module . . . . . . . . . . . . . . . . . . . 3-7

Configuring Analog Modules With RSNetWorx . . . . . . . . . . 3-8

Chapter 4

Analog Output Image. . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Analog Output Data File . . . . . . . . . . . . . . . . . . . . . . . 4-2

Analog Output Data File With Discrete Output Expansion

Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

Analog Output Data Format. . . . . . . . . . . . . . . . . . . . . . . . 4-7

Output Fault and Idle States . . . . . . . . . . . . . . . . . . . . . . . 4-7

Configuring Analog Output Module . . . . . . . . . . . . . . . . . . 4-8

Using RSNetWorx for DeviceNet. . . . . . . . . . . . . . . . . . 4-8

Module Diagnostics and Troubleshooting

Specifications

Chapter 5

Safety Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Indicator Lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Activating Devices When Troubleshooting . . . . . . . . . . 5-2

Stand Clear of the Machine. . . . . . . . . . . . . . . . . . . . . . 5-2

Program Alteration. . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

Safety Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

Module Operation vs. Channel Operation . . . . . . . . . . . . . 5-3

Power-up Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

Module Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

Network Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

Channel Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4

Out-of-Range Detection (Input Modules Only) . . . . . . . 5-4

Open-Circuit Detection (Input Module Only) . . . . . . . . 5-4

Analog Input Module Error Definition Table. . . . . . . . . . . . 5-5

Module Errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5

Channel LED Indicator Operation . . . . . . . . . . . . . . . . . . . 5-6

Contacting Rockwell Automation . . . . . . . . . . . . . . . . . . . . 5-7

Appendix A

DeviceNet Analog Base Terminal Block . . . . . . . . . . . . A-1

4-Channel Analog Current Input Module. . . . . . . . . . . . A-3

2-Channel Analog Current Output Module . . . . . . . . . . A-4

4-Channel Analog Voltage Input Module. . . . . . . . . . . . A-5

2-Channel Analog Voltage Output Module . . . . . . . . . . A-6

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PROFIBUS Modules Installation, Wiring, Module Data, Status and Channel Configuration

Glossary

Table of Contents iii

Appendix B

Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1

Module Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2

Prevent Electrostatic Discharge . . . . . . . . . . . . . . . . . . . B-2

Environment and Enclosure . . . . . . . . . . . . . . . . . . . . . B-3

Remove Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-4

General Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . B-4

Reducing Noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-4

Protecting the Circuit Board from Contamination. . . . . . B-4

Installing CompactBlock LDX I/O . . . . . . . . . . . . . . . . . . . B-5

Set the Station Address on the Base Block . . . . . . . . . . B-5

Mount the Base Block . . . . . . . . . . . . . . . . . . . . . . . . . B-5

Connect the PROFIBUS DP Terminal Connector . . . . . . B-8

Connect Power to the Block. . . . . . . . . . . . . . . . . . . . . B-9

Connecting I/O Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . B-10

General Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . B-10

Guidelines for Input Modules . . . . . . . . . . . . . . . . . . . B-10

Guidelines for Output Modules . . . . . . . . . . . . . . . . . B-10

Wiring the Modules . . . . . . . . . . . . . . . . . . . . . . . . . . B-11

1790P-TN4C0 Data Structure . . . . . . . . . . . . . . . . . . . . . . B-15

Analog Input Image . . . . . . . . . . . . . . . . . . . . . . . . . . B-15

1790P-TNOC2 Data Structure. . . . . . . . . . . . . . . . . . . . . . B-16

Analog Output Image. . . . . . . . . . . . . . . . . . . . . . . . . B-16

Output Fault and Idle States . . . . . . . . . . . . . . . . . . . . . . B-16

Configuring PROFIBUS Analog Modules . . . . . . . . . . . . . B-16

Configuring Analog Modules with the SST PROFIBUS

Configuration Tool . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-17

Downloading Configuration. . . . . . . . . . . . . . . . . . . . . . . B-21

PROFIBUS DP Specifications . . . . . . . . . . . . . . . . . . . . . . B-24

Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-25

Index

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Table of Contents iv

Publication 1790-UM001A-EN-P - March 2002

Chapter

Overview

This chapter explains how analog data is used, and describes CompactBlock LDX analog input and output modules. Included is information about:

• the use of analog I/O

• the modules’ hardware and diagnostic features

• an overview of the analog input system operation

• an overview of the analog output system operation

How to Use Analog I/O

Analog refers to the representation of numerical quantities by the measurement of continuous physical variables. Analog applications are present in many forms. The following application shows a typical use of analog data.

In this application, the processor controls the amount of fluid in a holding tank by adjusting the valve opening. The valve is initially open 100%. As the fluid level in the tank approaches the preset point, the processor modifies the output to close the valve 90%, 80%, and so on, continuously adjusting the valve to maintain the fluid level.

Analog output wired to valve

Valve

Controller

Level Sensor

Analog input wired

to tank

Analog I/O

Module

1 Publication 1790-UM001A-EN-P - March 2002

1-2 Overview

General Description

The analog input module converts and digitally stores analog data for retrieval by controllers, such as the SLC-500 programmable controller. The module supports connections from any combination of up to four voltage or current analog sensors. The four high-impedance input channels can be wired as single-ended inputs.

The output module provides two single-ended analog output channels, either voltage or current, depending on the module selected.

Table 1.1 lists the CompactBlock LDX module types and corresponding operating ranges:

Table 1.1 CompactBlock LDX Module Types and Operating Ranges

CompactBlock LDX

Module

1790D-N4CO

1790D-TN4CO

1790D-NOC2

1790D-TNOC2

Type: Operating Range:

Current Input 4-20mA

0-20mA

Current Output 0-20mA

1790D-N4VO

1790D-TN4VO

1790D-NOV2

1790D-TNOV2

Voltage Input 0-10V dc

Voltage Output 0-10V dc

Each analog base module supports up to two CompactBlock LDX discrete expansion modules.

Publication 1790-UM001A-EN-P - March 2002

DIN rail slot

DeviceNet network connector

Overview 1-3

Hardware Features

The modules contain either removable D-shell connectors or fixed terminal blocks. The CompactBlock LDX four input channels are single-ended. The CompactBlock LDX two output channels are also single-ended. Module configuration is normally done via the

controller’s programming software. In addition, some controllers support configuration via the user program.

Figure 1.1 shows the CompactBlock LDX analog modules’ hardware features.

Figure 1.1

Node address switches

Panel mount hole

Expansion connector under cover

Module indicators

Panel mount hole

Analog I/O connections (D-shell shown)

43218

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1-4 Overview

General Diagnostic Features

The CompactBlock LDX modules contain diagnostic features that can help you identify the source of problems that may occur during power-up or during normal channel operation. These power-up and channel diagnostics are explained in Chapter 5, Module Diagnostics and Troubleshooting.

System Overview

The modules communicate to the controller through the DeviceNet network. Module power is derived from DeviceNet. Additionally, the analog I/O requires 24V dc field power separate from DeviceNet. CompactBlock LDX analog bases support up to two discrete LDX expansion modules.

System Operation

At power-up, the analog base module performs a check of its internal circuits, memory, and basic functions. During this time, the module status LED remains off. If no faults are found during power-up diagnostics, the module status LED is turned on.

After power-up checks are complete, the module waits for valid channel configuration data. If an invalid configuration is detected, the module generates a configuration error. Once a channel is properly configured and enabled, it begins the analog-to-digital or digital-to-analog conversion process.

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Overview 1-5

Module Operation

Input Module

The input module’s input circuitry consists of four analog inputs multiplexed into a single analog-to-digital (A/D) converter. The A/D converter reads the selected input signal and converts it to a digital value that is presented to the network. The multiplexer sequentially switches each input channel to the module’s A/D converter. Figure 1.2 on page 1-5 shows a block diagram of the circuitry.

Figure 1.2

Isolation

Input 0

Input 1

Input 2 Input 3

24V dc Field Power

Data

Signal

A/D

Control

Multiplexer

Select

Analog power supply

Analog power

Optocouplers

Microcontroller

DeviceNetXCVR

43219

Each time the input module reads a channel, the module tests that analog data value for an overrange or underrange condition. If such a condition is detected, a unique bit is set in the channel status word. The channel status word is described in Chapter 4, Module Data, Status, and Channel Configuration for Analog Output Modules.

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1-6 Overview

Output 0

Analog output

Output Module

The output module uses a digital-to-analog (D/A) converter to read the digital output data from the network and convert it to an analog output signal. Figure 1.3 below shows a block diagram of the circuitry.

Figure 1.3

Isolation

Optocouplers

Data

Output 1

24V dc Field Power

Analog output

Analog power supply

D/A

Control

Analog power

Microcontroller

DeviceNetXCVR

43220

Publication 1790-UM001A-EN-P - March 2002

Installation and Wiring

This chapter tells you how to:

• determine the power requirements for the modules

• avoid electrostatic damage

• install the module

• wire the module’s terminal block

• wire input devices

• wire output devices

Chapter

Power Requirements

Module Installation

The modules receive power through the DeviceNet network and from an auxilary 24V dc field supply. The maximum power drawn by the modules is shown in Table 2.1.

Table 2.1 CompactBlock LDX Module Power Requirements

Voltage Range: Power:

DeviceNet Power: 11-28.8 V dc 1.2W @ 28.8V dc

Auxilary 24V dc Field Power: 21.6-26.4V dc 1.5W @ 26.4V dc

CompactBlock LDX is suitable for use in an industrial environment when installed in accordance with these instructions. Specifically, this equipment is intended for use in clean, dry environments (Pollution

(1)

degree 2

) and to circuits not exceeding Over Voltage Category II

(IEC 60664-1).

(3)

(2)

(1)

Pollution Degree 2 is an environment where, normally, only non-conductive pollution occurs except that occasionally a temporary conductivity caused by condensation shall be expected.

(2)

Over Voltage Category II is the load level section of the electrical distribution system. At this level transient voltages are controlled and do not exceed the impulse voltage capability of the product’s insulation.

(3)

Pollution Degree 2 and Over Voltage Category II are International Electrotechnical Commission (IEC) designations.

1 Publication 1790-UM001A-EN-P - March 2002

2-2 Installation and Wiring

Prevent Electrostatic Discharge

ATTENTION

Electrostatic discharge can damage integrated circuits or semiconductors if you touch analog I/O module bus connector pins or the terminal block on the input module. Follow these guidelines when you handle the module:

• Touch a grounded object to discharge static potential.

• Wear an approved wrist-strap grounding device.

• Do not touch the bus connector or connector pins.

• Do not touch circuit components inside the module.

• If available, use a static-safe work station.

• When it is not in use, keep the module in its box.

Environmnet and Enclosure

ATTENTION

This equipment is intended for use in a Pollution Degree 2 industrial environment, in overvoltage Category II applications (as defined in IEC publication 60664-1), at altitudes up to 2000 meters without derating.

This equipment is considered Group 1, Class A industrial equipment according to IEC/CISPR Publication 11. Without appropriate precautions, there may be potential difficulties ensuring electromagnetic compatibility in other environments due to conducted as well as radiated disturbance.

This equipment is supplied as "open type" equipment. It must be mounted within an enclosure that is suitably designed for those specific environmental conditions that will be present and appropriately designed to prevent personal injury resulting from accessibility to live parts. The interior of the enclosure must be accessible only by the use of a tool. Subsequent sections of this publication may contain additional information regarding specific enclosure type ratings that are required to comply with certain product safety certifications.

Publication 1790-UM001A-EN-P - March 2002

See NEMA Standards publication 250 and IEC publication 60529, as applicable, for explanations of the degrees of protection provided by different types of enclosure. Also, see the appropriate sections in this publication, as well as the Allen-Bradley publication 1770-4.1 ("Industrial Automation Wiring and Grounding Guidelines"), for additional installation requirements pertaining to this equipment.

Remove Power

Installation and Wiring 2-3

General Considerations

ATTENTION

Remove power before removing or inserting this module or an expansion module. When you remove or insert a module with power applied, an electrical arc may occur. An electrical arc can cause personal injury or property damage by:

• sending an erroneous signal to your system’s field

devices, causing unintended machine motion

• causing an explosion in a hazardous environment

Electrical arcing causes excessive wear to contacts on both the module and its mating connector and may lead to premature failure.

Reducing Noise

Most applications require installation in an industrial enclosure to reduce the effects of electrical interference. Analog inputs and outputs are highly susceptible to electrical noise. Electrical noise coupled to the analog inputs will reduce the performance (accuracy) of the module.

Group your modules in the enclosure to minimize adverse effects from radiated electrical noise and heat. Consider the following conditions when selecting a location for the analog module. Position the module:

• away from sources of electrical noise such as hard-contact

switches, relays, and AC motor drives

• away from modules which generate significant radiated heat.

In addition, route shielded, twisted-pair analog input and output wiring away from any high voltage I/O wiring.

Protecting the Circuit Board from Contamination

The printed circuit boards of the analog modules must be protected from dirt, oil, moisture, and other airborne contaminants. To protect these boards, the system must be installed in an enclosure suitable for the environment. The interior of the enclosure should be kept clean and the enclosure door should be kept closed whenever possible.

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2-4 Installation and Wiring

Installing CompactBlock LDX I/O

Follow these steps to install the block:

1. Set the Node Address on the Base Block

2. Mount the Base Block

3. Mount the Optional Expansion Blocks

4. Connect the DeviceNet Cable

Set the Node Address on the Base Block

Each base block comes with its internal program set for node address

63. To reset the node address, adjust the switches on the front of the block. The two switches are most significant digit (MSD) and least significant digit (LSD). The switches can be set between 00 and 63.

The rotary switches are read at block power up only. Switch settings between 64 and 99 cause the block to use the last valid node address stored internally

Node Address is set to 11

Figure 2.1

NODE ADDRESS

MOD NET

STATUS

LSDMSD

43216

The node address may also be set through RSNetWorx for DeviceNet or a similar configuration tool. When software configuration is used for the node address, the switches must be set between 64 and 99.

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Installation and Wiring 2-5

Mount the Base Block

You can mount the base block to a panel or DIN rail. We recommend that you ground the panel or DIN rail before mounting the block.

IMPORTANT

WARNING

The analog base module can accommodate a maximum of two discrete expansion modules.

When used in a Class I, Division 2, hazardous location, this equipment must be mounted in a suitable enclosure with proper wiring method that complies with the governing electrical codes.

Panel Mounting

1. Place the block against the panel where you want to mount it.

2. Gently pull and position the expansion cover to the left.

3. Place a center punch, nail or similar device through the

mounting holes in the block and make two marks on the panel (lower left and upper right corners of the module).

4. Remove the block and drill two holes in the panel to

accommodate each of the mounting screws.

5. Replace the block on the panel and place a screw through each of the

two mounting holes. Tighten the screws until the block is firmly in place.

95 mm

3.74 in

CompactB

1790-16BVOX

41 mm

1.6 in

EXPANSION UNIT

16 INPUTS-DCPOWER

Expansion Cover

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2-6 Installation and Wiring

Compact

PULL

Compact

PULL

Compact

PULL

Compact

Block LDX

PULL

Compact

PULL

Compact

PULL

Compact

PULL

DIN Rail Mounting

1. Hook the top of slot of the block over the DIN Rail.

Pull down on the locking lever while pressing the block against the rail.

Locking Lever

3. Push up on the locking lever to secure the block to the rail

when block is flush against the rail.

Mount the Optional Expansion Blocks

Mount the expansion block by connecting it to a previously-installed CompactBlock LDX I/O base or expansion block.

Beginning with the base block, you can mount your expansion blocks horizontally or vertically:

• horizontally (left to right) - add expansion blocks in a

end-to-end configuration

• vertically (up or down) - add expansion blocks either up or

down in a back-to-back configuration. In this configuration, you must use the optional 15cm ribbon cable (1790-15CMCBL) and alternately position the blocks in a right-side up, upside-down fashion.

Compact

Block LDX

Compact

Block LDX

EXPANSION UNIT

PULL

RIGHT SIDE UP

Horizontal mounting

EXPANSION UNIT

PULL

RIGHT SIDE UP

Vertical mounting

Compact

Block LDX

PULL

Compact

EXPANSION UNIT

RIGHT SIDE UP

UPSIDE DOWN

Compact

Block LDX

Compact

EXPANSION UNIT

PULL

RIGHT SIDE UP

Block LDX

PULL

EXPANSION UNIT

Block LDX

PULL

Compact

Block LDX

The longer expansion cable (1790-15CMCBL) will allow up to 7cm of space in between blocks.

PULL

EXPANSION UNIT

PULL

RIGHT SIDE UP

You can mount your blocks on a panel or DIN rail as described in the previous section.

Publication 1790-UM001A-EN-P - March 2002

Installation and Wiring 2-7

Connect the DeviceNet Cable

Follow these procedures when connecting the DeviceNet cable to the base block.

The required DeviceNet connector is not supplied with the block you must purchase it separately. There are three types of connectors that you can order directly from Rockwell Automation or your local distributor:

• 1799-DNETCON - 5-position open style connector

• 1799-DNETSCON - 5-position open style connector with locking

screws

• 1799-DNC5MMS - 5-position open style to 12mm connector with

locking screws

WARNING

If you connect or disconnect the DeviceNet cable with power applied to this module or any device on the network, an electrical arc can occur. This could cause an explosion in hazardous location

installations.

Be sure that power is removed or the area is nonhazardous before proceeding.

Connect the DeviceNet wiring (drop line) to one of the DeviceNet connectors as shown below. A color-coded wiring diagram is also printed next to the connector on the left side of the module

CompactBlock LDX

Wiring Diagram for 1799-DNETCON

V+ Red

Can_H White

Drain/Shield

V+ Red

V- Black

Wiring Diagram for 1799-DNC5MMS

Can_L Blue

V- Black

Drain/Shield

Can_H White

Can_L Blue

Once you have properly wired the drop line to the connector, attach the connector to the block. If applicable, use the locking screws on the connector to fasten it to the block.

Publication 1790-UM001A-EN-P - March 2002

2-8 Installation and Wiring

I/O System Wiring Guidelines

Consider the following when wiring your system:

General

• All module commons (COM) are connected in the analog

module. The analog common (COM) is not connected to earth ground inside the module.

• Channels are not isolated from each other.

• Do not use the analog module’s NC terminals as connection

points.

• To ensure optimum accuracy, limit overall cable impedance by

keeping your cable as short as possible. Locate the I/O system as close to your sensors or actuators as your application will permit.

• Use Belden™ 8761, or equivalent, shielded wire.

• Keep shield connection to ground as short as possible.

• Under normal conditions, the drain wire and shield junction

must be connected to earth ground via a panel or DIN rail mounting screw at the analog I/O module end.

(1)

Input Modules

• If multiple power supplies are used with analog inputs, the

power supply commons must be connected together.

• The module does not provide loop power for analog inputs. Use

a power supply that matches the input transmitter specifications.

Output Modules

• Voltage outputs (CH0 and CH1) of the 1790D-NOV2/TNOV2

modules are referenced to COM. Load resistance for a voltage output channel must be equal to or greater than 1K

• Current outputs (CH0 and CH1) of the 1790D-NOC2/TNOC2

modules source current that returns to COM. Load resistance for a current output channel must remain between 0 and 600

Ω.

Publication 1790-UM001A-EN-P - March 2002

(1)

In environments where high-frequency noise may be present, it may be necessary to directly ground cable shields to earth at the module end and via a 0.1µF capacitor at the sensor end.

Installation and Wiring 2-9

Effect of Transducer/Sensor and Cable Length Impedance on Voltage Input Accuracy

For voltage inputs, the length of the cable used between the transducer/sensor and the module can affect the accuracy of the data provided by the module.

RcRs

Where:

V in

Rc = DC resistance of the cable (each conductor) depending on cable length

Rs = Source impedance of analog transducer/sensor output

Ri = Impedance of the voltage input (500K

Ω for

1790D-N4VO/TN4VO)

Vs = Voltage source (voltage at the transducer/sensor input device)

Vin = Measured potential at the module input

%Ai = Percent added inaccuracy in a voltage-based system due to source and cable impedance.

Ri Vs

Vin

-------------------------------------------------------

Rs 2 Rc×()Ri++[]

×[]

Publication 1790-UM001A-EN-P - March 2002

2-10 Installation and Wiring

For example, for Belden 8761 two conductor, shielded cable:

Rc = 16

Ω/1000 ft

Rs = 0 (ideal source)

Vin



%Ai 1

Table 2.2 Effect of Cable Length on Input Accuracy

Length of Cable (m) dc resistance of the

cable, Rc (

50 2.625 0.00105%

100 5.25 0.00210%

200 10.50 0.00420%

300 15.75 0.00630%

---------

–



100×=

Ω)

Accuracy impact at the

input module

As input source impedance (Rs) and/or resistance (dc) of the cable (Rc) get larger, system accuracy decreases. If you determine that the inaccuracy error is significant, implementing the following equation in the control program can compensate for the added inaccuracy error due to the impedance of the source and cable.

Vs Vin

Rs 2 Rc

-------------------------------------------------------

×=

×()Ri++[]

Publication 1790-UM001A-EN-P - March 2002

TIP

In a current loop system, source and cable impedance do not impact system accuracy.

Installation and Wiring 2-11

Effect of Device and Cable Output Impedance on Output Module Accuracy

The maximum value of the output impedance is shown in the example below, because it creates the largest deviation from an ideal voltage source.

Rs Rc

–

Where:

Vload Rload

43266

Rc = DC resistance of the cable (each conductor) depending on cable length

Rs = Source impedance of 1790D-NOV2/TNOV2 (0.5

= Impedance of the load device

load

Ω)

Vs = Voltage at the output of 1790D-NOV2/TNOV2

= Measured potential at the load device

load

%Ai = Percent added inaccuracy in a voltage-based system due

to source and cable impedance.

x Vs]

load

[Rs + (2 x Rc) + R

load

]

For example, for Belden 8761 two conductor, shielded cable and a 1790D-NOV2/TNOV2 module:

Rc = 16

Ω/1000 ft

Rs = 0.5

%AV

load

Ω

= (1 - ) x 100

load

Publication 1790-UM001A-EN-P - March 2002

2-12 Installation and Wiring

Table 2.3 Effect of Output Impedance and Cable Length on Accuracy

Length of Cable

(m)

dc resistance of

the cable, Rc (

Ω)

Accuracy impact at the load

Ω 10,000Ω 100,000Ω

1,000

1 0.0525 0.0605% 0.00605% 0.000605%

10 0.525 0.155% 0.0155% 0.00155%

50 2.625 0.575% 0.0575% 0.00575%

100 5.25 1.1% 0.11% 0.011%

As output impedance (Rs) and/or resistance (dc) of the cable (Rc) get larger, system accuracy decreases. If you determine that the inaccuracy error is significant, implementing the following equation in the control program can compensate for the added inaccuracy error due to the impedance of the output module and cable.

+ (2 x Rc) + R

Vs = V

TIP

load

In a current loop system, source and cable impedance do not impact system accuracy.

load

]

Publication 1790-UM001A-EN-P - March 2002

Wiring the Modules

Installation and Wiring 2-13

ATTENTION

To prevent shock hazard, care should be taken when wiring the module to analog signal sources. Before wiring any analog module, disconnect power from the system power supply and from any other source to the analog module.

After the analog module is properly installed, follow the wiring procedure below. To ensure proper operation and high immunity to electrical noise, always use Belden™ 8761 (shielded, twisted-pair) or

equivalent wire.

ATTENTION

Never connect a voltage or current source to an analog output channel.

signal wire

drain wire

cable

foil shield

signal wire

Cut foil shield and drain wire

signal wire

Publication 1790-UM001A-EN-P - March 2002

2-14 Installation and Wiring

To wire your module follow these steps.

1. At each end of the cable, strip some casing to expose the

individual wires.

2. Trim the signal wires to 2-inch lengths. Strip about 3/16 inch (5

mm) of insulation away to expose the end of the wire.

ATTENTION

Be careful when stripping wires. Wire fragments that fall into a module could cause damage at power up.

3. At one end of the cable, twist the drain wire and foil shield

together.

Under normal conditions, this drain wire and shield junction must be connected to earth ground, via a panel or DIN rail mounting screw at the analog I/O module end. Keep the length of the drain wire as short as possible.

In environments where high frequency noise may be present, it may be necessary to ground the cable shields to earth at the module and via a 0.1µF capacitor at the sensor end for analog inputs and at the load end for analog outputs.

4. At the other end of the cable, cut the drain wire and foil shield

back to the cable.

Publication 1790-UM001A-EN-P - March 2002

5. Connect the signal wires to the terminal block as shown in

analog input wiring on page 2-15 and page 2-16 and analog output wiring on page 2-17 and page 2-18.

6. Connect the other end of the cable to the analog input or output

device.

7. Repeat steps 1 through 5 for each channel on the module.

Installation and Wiring 2-15

1790D-N4C0, 1790D-N4V0 Analog 4 Input Base D-Shell Modules Wiring

Table 2.4 lists the module pin descriptions. Figure 2.2 and Figure 2.3 show how to wire each module.

Table 2.4 1790D-N4C0 and 1790D-N4V0 Module Pin Descriptions

Pin Number 12345678910

Description: NC NC NC NC NC CH3 NC CH2 NC CH1

Pin Number: 11 12 13 14 15 16 17 18 19 20

Description: NC CH0 NC NC NC NC +24V +24V +24V NC

Pin Number 21 22 23 24 25 26 27 28 29 30

Description: NC NC NC COM NC COM NC COM NC COM

Pin Number: 31 32 33 34 35 36 37

Description: NC NC NC NC GND GND GND

NC = No Connect +24V = Field Power (+) 24V dc GND = Field Power (-) GND

+ –

24V dc

+ –

24V dc

+24V

GND

+24V

GND

Figure 2.2 Example of Input Wiring to the 1790D-N4C0 Module

CH0

+ –

COM

Figure 2.3 Example of Input Wiring to the 1790D-N4V0 Module

CH0

+ –

COM

43221

Publication 1790-UM001A-EN-P - March 2002

2-16 Installation and Wiring

Pin Number 12345678910

Description: +24V GND CH0 COM CH1 COM CH2 COM CH3 COM

Pin Number: 11 12 13 14 15 16 17 18 19 20

Description: NC NC NC NC NC NC NC NC NC NC

+24V = Field Power (+) 24V dc GND = Field Power (-) GND

1790D-TN4C0, 1790D-TN4V0 Analog 4 Input Base Modules Wiring

Table 2.5 lists the module pin descriptions. Figure 2.4 and Figure 2.5 show how to wire each module.

Table 2.5 1790D-TN4C0 and 1790D-TN4V0 Module Pin Descriptions

Figure 2.4 Example of Input Wiring to the 1790D-TN4C0 Module

+24V

GND

+ –

24V dc

CH0

COM

–

Figure 2.5 Example of Input Wiring to the 1790D-TN4V0 Module

+24V

GND

+ –

24V dc

CH0

COM

–

Publication 1790-UM001A-EN-P - March 2002

Installation and Wiring 2-17

1790D-N0C2, 1790D-N0V2 Analog 2 Output Base D-Shell Modules Wiring

Table 2.6 lists the module pin descriptions. Figure 2.6 shows how to wire each module.

Table 2.6 1790D-N0C2 and 1790D-N0V2 Module Pin Descriptions

Pin Number 12345678910

Description: NC NC NC NC NC NC NC NC NC CH1

Pin Number: 11 12 13 14 15 16 17 18 19 20

Description: NC CH0 NC NC NC NC +24V +24V +24V NC

Pin Number 21 22 23 24 25 26 27 28 29 30

Description: NC NC NC NC NC NC NC COM NC COM

Pin Number: 31 32 33 34 35 36 37

Description: NC NC NC NC GND GND GND

NC = No Connect +24V = Field Power (+) 24V dc GND = Field Power (-) GND

Figure 2.6 Example of Input Wiring to the 1790D-N0C2 and 1790D-N0V2 Modules

+24V

GND

+ –

24V dc

+ –

CH0

COM

43225

Publication 1790-UM001A-EN-P - March 2002

2-18 Installation and Wiring

Pin Number 12345678910

Description: +24V GND CH0 COM CH1 COM NC NC NC NC

Pin Number: 11 12 13 14 15 16 17 18 19 20

Description: NC NC NC NC NC NC NC NC NC NC

+24V = Field Power (+) 24V dc GND = Field Power (-) GND

1790D-TN0C2, 1790D-TN0V2 Analog 4 Input Base Modules Wiring

Table 2.7 lists the module pin descriptions. Figure 2.7 shows how to wire each module.

Table 2.7 1790D-TN0C2 and 1790D-TN0V2 Module Pin Descriptions

Figure 2.7 Example of Input Wiring to the 1790D-TN0C2 and 1790D-TN0V2 Modules

+24V

GND

+ – +

24V dc

CH0

COM

–

43226

Publication 1790-UM001A-EN-P - March 2002

Chapter

Module Data, Status, and Channel Configuration for Analog Input Modules

This chapter examines the analog input module’s data table, channel status, and channel configuration.

Analog Input Image

The input image file represents data words and status bits. Input words 0 through 3 hold the input data that represents the value of the analog inputs for channels 0 through 3. These data words are valid only when the channel is enabled and there are no errors. Input word 4 holds the status bits. Analog input data is presented as raw/proportional.

Input words 5 and 6 contain input data for two optional discrete input expansion modules.

1790D-N4C0/TN4C0 Configuration

Each analog current input may be configured for either the 4-20mA or 0-20mA range. This is most easily accomplished via RSNetWorx for DeviceNet, as shown on page 3-8.

1 Publication 1790-UM001A-EN-P - March 2002

3-2 Module Data, Status, and Channel Configuration for Analog Input Modules

Analog Input Data File

The input data table allows you to access analog input module and data for use in the control program, via word and bit access. The data table structure is shown below.

1790D-N4C0/-TN4C0, 1790D-N4V0/-TN4V0 Input Data File

Word Bit Position

1514131211109876543210

0 Not Used Analog Input Data Channel 0

1 Not Used Analog Input Data Channel 1

2 Not Used Analog Input Data Channel 2

3 Not Used Analog Input Data Channel 3

4 Not Used S3 S2 S1 S0

Word/Bit Descriptions

Word Decimal Bit Description

Read Word 0 Bits 00-11 Channel 0 input data

Bits 12-15 Not used: Set to 0

Read Word 1 Bits 00-11 Channel 1 input data

Bits 12-15 Not used: Set to 0

Read Word 2 Bits 00-11 Channel 2 input data

Bits 12-15 Not used: Set to 0

Read Word 3 Bits 00-11 Channel 3 input data

Bits 12-15 Not used: Set to 0

Read Word 4 Bits 00-03 Status bits for individual channels - Bit 00 corresponds to input

channel 0, bit 01 corresponds to input channel 1 and so on. When set (1) indicates:

• No field power

• Open wire (4-20mA current input only)

• Under range (4-20mA current input only)

• Recoverable module fault (whole channel to be set)

• Unrecoverable module fault (whole channel to be set)

Bits 04-15 Not used: Set to 0

Publication 1790-UM001A-EN-P - March 2002

Module Data, Status, and Channel Configuration for Analog Input Modules 3-3

Analog Input Data File With Discrete Input Expansion Modules

The data table below shows the structure for an analog base module with one (1) of the following 8-input modules:

• 1790-8BV8BX/-T8BV8BX

• 1790-T8A0X discrete expansion module.

1790D-N4C0/-TN4C0, 1790D-N4V0/-TN4V0 Input Data File with 8-Bit Discrete Expansion Module

Word Bit Position

1514131211109876543210

0 Not Used Analog Input Data Channel 0

1 Not Used Analog Input Data Channel 1

2 Not Used Analog Input Data Channel 2

3 Not Used Analog Input Data Channel 3

4 Not Used S3 S2 S1 S0

5 Not Used D7 D6 D5 D4 D3 D2 D1 D0

Word/Bit Descriptions

Word Decimal Bit Description

Read Word 0 Bits 00-11 Channel 0 input data

Bits 12-15 Not used: Set to 0

Read Word 1 Bits 00-11 Channel 1 input data

Bits 12-15 Not used: Set to 0

Read Word 2 Bits 00-11 Channel 2 input data

Bits 12-15 Not used: Set to 0

Read Word 3 Bits 00-11 Channel 3 input data

Bits 12-15 Not used: Set to 0

Read Word 4 Bits 00-03 Status bits for individual channels - Bit 00 corresponds to input

channel 0, bit 01 corresponds to input channel 1 and so on. When set (1) indicates:

• No field power

• Open wire (4-20mA current input only)

• Under range (4-20mA current input only)

• Recoverable module fault (whole channel to be set)

• Unrecoverable module fault (whole channel to be set)

Bits 04-15 Not used: Set to 0

Read Word 5 Bits 00-07 Discrete Input expansion data

Bits 08-15 Not Used

Publication 1790-UM001A-EN-P - March 2002

3-4 Module Data, Status, and Channel Configuration for Analog Input Modules

The data table below shows the structure for an analog base module with two (2) of the following 8-input modules:

• 1790-8BV8BX/-T8BV8BX modules,

• 1790-T8A0X discrete expansion modules

or one (1) of the following 16-input modules:

• 1790-16BV0X/-T16BV0X discrete expansion modules

1790D-N4C0/-TN4C0, 1790D-N4V0/-TN4V0 Input Data File with 16-Bit Discrete Expansion Module(s)

Word Bit Position

1514131211109876543210

0 Not Used Analog Input Data Channel 0

1 Not Used Analog Input Data Channel 1

2 Not Used Analog Input Data Channel 2

3 Not Used Analog Input Data Channel 3

4 Not Used S3 S2 S1 S0

5 D15D14D13D12D11D10D9D8D7D6D5D4D3D2D1D0

Word/Bit Descriptions

Word Decimal Bit Description

Read Word 0 Bits 00-11 Channel 0 input data

Bits 12-15 Not used: Set to 0

Read Word 1 Bits 00-11 Channel 1 input data

Bits 12-15 Not used: Set to 0

Read Word 2 Bits 00-11 Channel 2 input data

Bits 12-15 Not used: Set to 0

Read Word 3 Bits 00-11 Channel 3 input data

Bits 12-15 Not used: Set to 0

Read Word 4 Bits 00-03 Status bits for individual channels - Bit 00 corresponds to input

channel 0, bit 01 corresponds to input channel 1 and so on. When set (1) indicates:

• No field power

• Open wire (4-20mA current input only)

• Under range (4-20mA current input only)

• Recoverable module fault (whole channel to be set)

• Unrecoverable module fault (whole channel to be set)

Bits 04-15 Not used: Set to 0

Read Word 5 Bits 00-15 Discrete Input expansion data

Publication 1790-UM001A-EN-P - March 2002

Module Data, Status, and Channel Configuration for Analog Input Modules 3-5

The data table below shows the structure for an analog base module with one (1) of the following 16-input modules:

• 1790-16BV0X/-T16BV0X discrete expansion module

and one (1) of the following 8-input modules:

• 1790-8BV8BX/-T8BV8BX discrete expansion module

• 1790-8BV8VX/T8BVX discrete expansion module

• 1790-T8A0X discrete expansion module

1790D-N4C0/-TN4C0, 1790D-N4V0/-TN4V0 Input Data File with 24-Bit Discrete Expansion Modules

Word Bit Position

1514131211109876543210

0 Not Used Analog Input Data Channel 0

1 Not Used Analog Input Data Channel 1

2 Not Used Analog Input Data Channel 2

3 Not Used Analog Input Data Channel 3

4 Not Used S3 S2 S1 S0

5 D15D14D13D12D11D10D9D8D7D6D5D4D3D2D1D0

6 Not Used D23 D22 D21 D20 D19 D18 D17 D16

Word/Bit Descriptions

Word Decimal Bit Description

Read Word 0 Bits 00-11 Channel 0 input data

Bits 12-15 Not used: Set to 0

Read Word 1 Bits 00-11 Channel 1 input data

Bits 12-15 Not used: Set to 0

Read Word 2 Bits 00-11 Channel 2 input data

Bits 12-15 Not used: Set to 0

Read Word 3 Bits 00-11 Channel 3 input data

Bits 12-15 Not used: Set to 0

Read Word 4 Bits 00-03 Status bits for individual channels - Bit 00 corresponds to input channel 0,

Bits 04-15 Not used: Set to 0

Read Word 5 Bits 00-15 First discrete Input expansion data

Read Word 6 Bits 00-07 Second discrete Input expansion data

Bits 08-15 Not Used

bit 01 corresponds to input channel 1 and so on. When set (1) indicates:

• No field power

• Open wire (4-20mA current input only)

• Under range (4-20mA current input only)

• Recoverable module fault (whole channel to be set)

• Unrecoverable module fault (whole channel to be set)

Publication 1790-UM001A-EN-P - March 2002

3-6 Module Data, Status, and Channel Configuration for Analog Input Modules

The data table below shows the structure for an analog base module with two (2) 16-input 1790-16BV0X/-T16BV0X discrete expansion modules.

1790D-N4C0/-TN4C0, 1790D-N4V0/-TN4V0 Input Data File with 32-Bit Discrete Expansion Modules

Word Bit Position

1514131211109876543210

0 Not Used Analog Input Data Channel 0

1 Not Used Analog Input Data Channel 1

2 Not Used Analog Input Data Channel 2

3 Not Used Analog Input Data Channel 3

4 Not Used S3 S2 S1 S0

5 D15D14D13D12D11D10D9D8D7D6D5D4D3D2D1D0

6 D31 D30 D29 D28 D27 D26 D25 D24 D23 D22 D21 D20 D19 D18 D17 D16

Word/Bit Descriptions

Word Decimal Bit Description

Read Word 0 Bits 00-11 Channel 0 input data

Bits 12-15 Not used: Set to 0

Read Word 1 Bits 00-11 Channel 1 input data

Bits 12-15 Not used: Set to 0

Read Word 2 Bits 00-11 Channel 2 input data

Bits 12-15 Not used: Set to 0

Read Word 3 Bits 00-11 Channel 3 input data

Bits 12-15 Not used: Set to 0

Read Word 4 Bits 00-03 Status bits for individual channels - Bit 00 corresponds to input

channel 0, bit 01 corresponds to input channel 1 and so on. When set (1) indicates: No field power Open wire (4-20mA current input only) Under range (4-20mA current input only) Recoverable module fault (whole channel to be set) Unrecoverable module fault (whole channel to be set)

Bits 04-15 Not used: Set to 0

Read Word 5 Bits 00-15 First discrete Input expansion data

Read Word 6 Bits 00-15 Second discrete Input expansion data

Publication 1790-UM001A-EN-P - March 2002

Module Data, Status, and Channel Configuration for Analog Input Modules 3-7

Analog Input Data Format

Module: Input Full Scale

1790D-N4V0/-TN4V0 0-10V dc 0000-0FFF 0-4095 2.44mV

1790D-N4C0/-TN4C0 4-20mA 0000-0FFF 0-4095 3.90µA

Configuring Analog Input Module

Analog input data is presented as raw/proportional. The full 12-bit resolution is used over the entire span of the input full scale range, as shown in Table 3.1.

Table 3.1

HEX Data Range: Decimal Data

Range:

0-20mA 0000-0FFF 0-4095 4.88

Configuring CompactBlock LDX modules is as easy as POINT and click. RSNetWorx for DeviceNet™ allows you to simply identify the network and configure the I/O modules with easy-to-use Electronic Data Sheets (EDS). Just POINT to the field and click on your selection.

To obtain EDS files for use in configuration, go to:

http://www.ab.com/networks/eds.

Range:

Input Resolution:

µA

EDS files for blocks with matching catalog numbers (for D-Shell and terminal block versions) are the same. Thus on the website or in RSNetWorx for DeviceNet, there may be only one catalog number listed for both versions.

When using 3rd-party configuration software, simply load the EDS files into the software and follow the vendor’s instructions.

Publication 1790-UM001A-EN-P - March 2002

3-8 Module Data, Status, and Channel Configuration for Analog Input Modules

Configuring Analog Modules With RSNetWorx

A. Use the + signs to open the

following path:

DeviceNet

ÕVendor

Õ Rockwell Automation -

Allen-Bradley

Õ Rockwell Automation

miscellaneous

B. Double-click on the module.

To configure analog modules, proceed as described in the steps below:

1. Open RSNetWorx for DeviceNet.

2. Add an analog input module (e.g. 1790D-N4C0) to the network,

as shown below..

It appears on the network.

3. Double-click on the module icon on the DeviceNet network. If

you are online, upload the configuration and existing module parameters are shown. A page similar to the one below appears.

Publication 1790-UM001A-EN-P - March 2002

Module Data, Status, and Channel Configuration for Analog Input Modules 3-9

4. Click on the Module Configuration tab. Analog input modules

have a configuration screen similar to the screen shown below for the 1790D-N4C0 module.

A. Click on the catalog number. B. Click on Properties.

C. Use the pull-down menu to

change range selection.

D. Click on OK after making all

configuration changes.

Use the Parameters tab to change module configuration. For example, the screen below shows how to change an AMP range selection.

Publication 1790-UM001A-EN-P - March 2002

3-10 Module Data, Status, and Channel Configuration for Analog Input Modules

The screen returns to "Module Configuration".

A. Click on Download to save

your configuration.

B. Click on OK after making all

configuration changes.

Publication 1790-UM001A-EN-P - March 2002

Chapter

Module Data, Status, and Channel Configuration for Analog Output Modules

This chapter examines the analog output module’s output data file and configuration.

Analog Output Image

The output image file represents data words. Output words 0 and 1 hold the output data that represents the value of the analog outputs for channels 0 and 1. Analog output data is presented as raw/proportional.

Output words 2 and 3 contain output data for two optional discrete output expansion modules.

1 Publication 1790-UM001A-EN-P - March 2002

4-2 Module Data, Status, and Channel Configuration for Analog Output Modules

Analog Output Data File

The structure of the output data file is shown below.

1790D-N0C2/-TN0C2, 1790D-N0V2/-TN0V2 Output Data File

Word Bit Position

1514131211109876543210

0 Not Used Analog Output Data Channel 0

1 Not Used Analog Output Data Channel 1

Word/Bit Descriptions

Word Decimal Bit Description

Write Word 0 Bits 00-11 Channel 0 output data

Bits 12-15 Not used: Set to 0

Write Word 1 Bits 00-11 Channel 1 output data

Bits 12-15 Not used: Set to 0

Publication 1790-UM001A-EN-P - March 2002

Module Data, Status, and Channel Configuration for Analog Output Modules 4-3

Analog Output Data File With Discrete Output Expansion Modules

The data table below shows the structure for an analog base module with one of the following 8-output modules:

• 1790-8BV8BX/-T8BV8BX discrete expansion module

• 1790-8BV8VX/-T8BV8VX discrete expansion module

• 1790-TOA8X discrete expansion module

• 1790-T0W8X discrete expansion module.

1790D-N0C2/-TN0C2, 1790D-N0V2/-TN0V2 Output Data File with 8-Bit Discrete Expansion Module

Word Bit Position

1514131211109876543210

0 Not Used Analog Output Data Channel 0

1 Not Used Analog Output Data Channel 1

2 Not Used

D7 D6 D5 D4 D3 D2 D1 D0

Word/Bit Descriptions

Word Decimal Bit Description

Write Word 0 Bits 00-11 Channel 0 output data

Bits 12-15 Not used: Set to 0

Write Word 1 Bits 00-11 Channel 1 output data

Bits 12-15 Not used: Set to 0

Write Word 2 Bits 00-07 Discrete output expansion data

Bits 08-15 Not used: Set to 0

Publication 1790-UM001A-EN-P - March 2002

4-4 Module Data, Status, and Channel Configuration for Analog Output Modules

The data table below shows the structure for an analog base module with one (1) of the following 16-output modules:

• 1790-OB16X/-TOB16X discrete expansion module

• 1790-OV16X/-TOV16X discrete expansion module

or two (2) of the following 8-output modules:

• 1790-8BV8BX/-T8BV8BX discrete expansion modules

• 1790-8BV8VX/-T8BV8VX discrete expansion modules

• 1790-TOA8X discrete expansion modules

• 1790-TOW8X discrete expansion modules

1790D-N0C2/-TN0C2, 1790D-N0V2/-TN0V2 Output Data File with 16-Bit Discrete Expansion Module(s)

Word Bit Position

1514131211109876543210

0 Not Used Analog Output Data Channel 0

1 Not Used Analog Output Data Channel 1

2 D15D14D13D12D11D10D9D8D7D6D5D4D3D2D1D0

Word/Bit Descriptions

Word Decimal Bit Description

Write Word 0 Bits 00-11 Channel 0 output data

Bits 12-15 Not used: Set to 0

Write Word 1 Bits 00-11 Channel 1 output data

Bits 12-15 Not used: Set to 0

Write Word 2 Bits 00-15 Discrete output expansion data

Publication 1790-UM001A-EN-P - March 2002

Module Data, Status, and Channel Configuration for Analog Output Modules 4-5

The data table below shows the structure for an analog base module with one (1) of the following 16-output modules:

• 1790-OB16X/-TOB16X discrete expansion module

• 1790-OV16X/-TOV16X discrete expansion module

and with one (1) of the following 8-input modules

• 1790-8BV8BX/-T8BV8BX discrete expansion module

• 1790-8BV8VX/T8BV8VX discrete expansion module

• 1790-TOA8X discrete expansion module

• 1790-TOW8X discrete expansion module

1790D-N4C0/-TN4C0, 1790D-N4V0/-TN4V0 Output Data File with 24-Bit Discrete Expansion Modules

Word Bit Position

1514131211109876543210

0 Not Used Analog Output Data Channel 0

1 Not Used Analog Output Data Channel 1

2 D15D14D13D12D11D10D9D8D7D6D5D4D3D2D1D0

3 Not Used D23 D22 D21 D20 D19 D18 D17 D16

Word/Bit Descriptions

Word Decimal Bit Description

Write Word 0 Bits 00-11 Channel 0 output data

Bits 12-15 Not used: Set to 0

Write Word 1 Bits 00-11 Channel 1 output data

Bits 12-15 Not used: Set to 0

Write Word 2 Bits 00-15 First discrete output expansion data

Write Word 3 Bits 00-07 Second discrete output expansion data

Bits 08-15 Not used: Set to 0

Publication 1790-UM001A-EN-P - March 2002

4-6 Module Data, Status, and Channel Configuration for Analog Output Modules

The data table below shows the structure for an analog base module with two (2) of the following 16-output modules:

• 1790-OB16X/-TOB16X discrete expansion modules

• 1790-OV16X/-TOV16X discrete expansion modules

1790D-N4C0/-TN4C0, 1790D-N4V0/-TN4V0 Output Data File with 32-Bit Discrete Expansion Modules

Word Bit Position

1514131211109876543210

0 Not Used Analog Output Data Channel 0

1 Not Used Analog Output Data Channel 1

2 D15D14D13D12D11D10D9D8D7D6D5D4D3D2D1D0

3 D31 D30 D29 D28 D27 D26 D25 D24 D23 D22 D21 D20 D19 D18 D17 D16

Word/Bit Descriptions

Word Decimal Bit Description

Write Word 0 Bits 00-11 Channel 0 output data

Bits 12-15 Not used: Set to 0

Write Word 1 Bits 00-11 Channel 1 output data

Bits 12-15 Not used: Set to 0

Write Word 2 Bits 00-15 First discrete output expansion data

Write Word 3 Bits 00-15 Second discrete output expansion data

Publication 1790-UM001A-EN-P - March 2002

Module Data, Status, and Channel Configuration for Analog Output Modules 4-7

Analog Output Data Format

Module: Output Full Scale

1790D-NOV2/-TNOV2 0-10V dc 0000-0FFF 0-4095 2.44mV

1790D-N0C2/-TNOC2 0-20mA 0000-0FFF 0-4095 4.88µA

Output Fault and Idle States

Analog output data is presented as raw/proportional. The full 12-bit resolution is used over the entire span of the output full scale range, as shown in Table 4.1.

Table 4.1

Range:

HEX Data Range: Decimal Data

Range:

Output Resolution:

Analog output fault (communication failure) and idle (processor in program mode) state can be defined for each output. Both fault state and idle state can have the behavior defined in Table 4.2 for each output.

Table 4.2

Behavior: 1790D-N0C2/-TN0C2: 1790D-N0V2/-TN0V2:

Go to low clamp 0mA 0V dc

Go to high clamp 20mA 10V dc

Go to fault/idle value User configurable User configurable

Hold last state Hold last value Hold last value

The user-specified value is entered in raw/proportional notation. For example:

• 0 is the low clamp. This value equals 0mA or oV dc.

• 4095 is the high clamp. This value equals 20mA or 10V dc.

• Values between 0 and 4095 denote proportional values. 2048

equals 10mA or 5V dc.

The values in the output data file are retained. Once a fault or idle condition is cleared, the retained output values are sent to the analog output channels.

Publication 1790-UM001A-EN-P - March 2002

4-8 Module Data, Status, and Channel Configuration for Analog Output Modules

Configuring Analog Output Module

Configuring CompactBlock LDX modules is as easy as POINT and click. RSNetWorx allows you to simply identify the network and configure the I/O modules with easy-to-use Electronic Data Sheets (EDS). Just POINT to the field and click on your selection.

To obtain EDS files for use in configuration, go to:

http://www.ab.com/networks/eds.

When using 3rd-party configuration software, simply load the EDS files into the software and follow the vendor’s instructions.

Using RSNetWorx for DeviceNet

To configure analog input modules, follow these steps:

A. Use the + signs to open the

following path:

DeviceNet

ÕRocwell Automation -

Allen-Bradley

Õ Rockwell Automation -

miscellaneous

B. Double-click on the module.

It appears on the network.

1. Open RSNetWorx for DeviceNet.

2. Add an analog output module (e.g. 1790D-N0C2) to the

network, as shown below..

Publication 1790-UM001A-EN-P - March 2002

If your network is running, you can also click on the Browse button to see what modules are on the network.

Module Data, Status, and Channel Configuration for Analog Output Modules 4-9

3. Double-click on the module icon on the DeviceNet network. If

you are online, upload the configuration and existing module parameters are shown. A page similar to the one below appears.

4. Click on the Module Configuration tab. Analog input modules

have a configuration screen similar to the screen shown below for the 1790D-N0C2 module.

A. Click on the catalog number. B. Click on Properties.

Publication 1790-UM001A-EN-P - March 2002

4-10 Module Data, Status, and Channel Configuration for Analog Output Modules

Use the Parameters tab to change module configuration. For example, the screen below shows how to change the Autobaud selection.

C. Use the pull-down menu to

change range selection.

D. Click on OK after making all

configuration changes.

A. Click on Download to save

your configuration.

B. Click on OK after making all

configuration changes.

The screen returns to "Module Configuration".

Publication 1790-UM001A-EN-P - March 2002

Chapter

Module Diagnostics and Troubleshooting

This chapter describes troubleshooting the analog input and output modules. This chapter contains information on:

• safety considerations when troubleshooting

• module vs. channel operation

• the module’s diagnostic features

Safety Considerations

Safety considerations are an important element of proper troubleshooting procedures. Actively thinking about the safety of yourself and others, as well as the condition of your equipment, is of primary importance.

The following sections describe several safety concerns you should be aware of when troubleshooting your control system.

ATTENTION

Never reach into a machine to actuate a switch because unexpected motion can occur and cause injury.

Remove all electrical power at the main power disconnect switches before checking electrical connections or inputs/outputs causing machine motion.

Indicator Lights

When the green MOD and NET LED indicator lights on the analog module are illuminated, it indicates that power is applied to the module, and the module is communicating on the network.

1 Publication 1790-UM001A-EN-P - March 2002

5-2 Module Diagnostics and Troubleshooting

Activating Devices When Troubleshooting

When troubleshooting, never reach into the machine to actuate a device. Unexpected machine motion could occur.

Stand Clear of the Machine

When troubleshooting any system problem, have all personnel remain clear of the machine. The problem could be intermittent, and sudden unexpected machine motion could occur. Have someone ready to operate an emergency stop switch in case it becomes necessary to shut off power to the machine.

Program Alteration

There are several possible causes of alteration to the user program, including extreme environmental conditions, Electromagnetic Interference (EMI), improper grounding, improper wiring connections, and unauthorized tampering. If you suspect a program has been altered, check it against a previously saved program on an EEPROM or UVPROM memory module.

Safety Circuits

Circuits installed on the machine for safety reasons, like over-travel limit switches, stop push buttons, and interlocks, should always be hard-wired to the master control relay. These devices must be wired in series so that when any one device opens, the master control relay is de-energized, thereby removing power to the machine. Never alter these circuits to defeat their function. Serious injury or machine damage could result.

Publication 1790-UM001A-EN-P - March 2002

Module Diagnostics and Troubleshooting 5-3

Module Operation vs. Channel Operation

Power-up Diagnostics

The module performs operations at two levels:

• module level - power-up, configuration, and communication

with a controller

• channel level - data conversion and over- or under-range

detection

Internal diagnostics are performed at both levels of operation. When detected, module error conditions are indicated by the module status and individual channel LED lights.

Module Status

At module power-up, a series of internal diagnostic tests are performed. These diagnostic tests must be successfully completed. Table 5.1 shows module status LED indicator operation.

Table 5.1

LED indicator: Status: Description:

Module status Solid red Unrecoverable fault in base unit

Flashing red Recoverable fault

Solid green Normal operation

Flashing green Stand by

Off No power

Network Status

The network status LED indicator shows the condition of the DeviceNet connection. Table 5.2 shows network status LED indicator operation.

Table 5.2

LED indicator: Status: Description:

Network status Solid red Unrecoverable communication fault

Flashing red Recoverable communication fault

Solid green Communication path complete

Flashing green Communication path incomplete

Off Device is not online or not powered

Publication 1790-UM001A-EN-P - March 2002

5-4 Module Diagnostics and Troubleshooting

Channel Diagnostics

When an input or output module channel is enabled, the module performs a diagnostic check to see that the channel has been properly configured. In addition, the module checks each channel on every scan for configuration errors, under-range, open-circuit (input module in 4 to 20 mA range only).

Out-of-Range Detection (Input

An out-of-range low test is performed on all channels configured for 4-20mA inputs. Whenever an out-of-range low condition occurs, the status bit for that channel is set in input data word 4.

Open-Circuit Detection (Input

The module performs an open-circuit test on all channels configured for 4 to 20 mA inputs. Whenever an open-circuit condition occurs, the status bit for that channel is set in input data word 4.

Modul

es Only)

Module On

ly)

Possible causes of an open circuit include:

• the sensing device may be broken

• a wire may be loose or cut

• the sensing device may not be installed on the configured

channel

Publication 1790-UM001A-EN-P - March 2002

Module Diagnostics and Troubleshooting 5-5

Analog Input Module Error

Analog input module errors are expressed on a channel bases in input read word 4. The structure of the status data is shown below.

Definition Table

Table 5.3

Word Bit Position

1514131211109876543210

4 Not used S3 S2 S1 S0

Word/Bit Descriptions

Word Decimal Bit Description

Read Word 4 Bits 00-03 Status bits for individual channels - Bit 00 corresponds to input

channel 0, bit 01 corresponds to input channel 1 and so on. When set (1) indicates:

• No field power

• Open wire (4-20mA current input only)

• Under range (4-20mA current input only)

• Recoverable module fault (whole channel to be set)

• Unrecoverable module fault (whole channel to be set)

Bits 04-15 Not used: Set to 0

Module Errors

Table 5.4 lists possible errors that cause the analog input module status bits to be set.

Table 5.4 Status Bit Table 1790D-N4CO/-TN4CO, 1790D-N4VO/-TN4VO

Range Setting

4-20mA <4mA

0-20mA <0mA

0-10V dc <0V dc

Underrange In Range Overrange Open

Set

Not set

Not set >20mA

Not set

Not set >20mA

Not set

Not set >10V

Not set

Short

Circuit

Set Set Set

Not set Not set Set

Circuit

No Field Power

Publication 1790-UM001A-EN-P - March 2002

5-6 Module Diagnostics and Troubleshooting

Channel LED Indicator Operation

Individual channel LED indicator operation is shown in the following tables.

Analog Input Modules

1790D-TN4V0 1790D-TN4C0

Status: Description: Status: Description:

Flashing Green/Red

Off Off line Off Off line

Red On line and no field

Red DeviceNet connection

Green Field power and open

Green Field power and valid

Green Input over range Green Input over range

Green Input under range Flashing Red

Power up Flashing

Green/Red

Red On line and no field

power

Red DeviceNet connection

and no field power

Flashing Red

wire

Green Field power and valid

input

Power up

power

and no field power

(1)

Field power and open wire (4-20mA range

(2)

only)

input

Input under range <3mA (4-20ma range

only)

Flashing Red Recoverable fault Flashing Red Recoverable fault

(1)

Green for 0-20mA range.

(2)

Can be determined from the data table.

Publication 1790-UM001A-EN-P - March 2002

Module Diagnostics and Troubleshooting 5-7

Analog Output Modules

1790D-TN0V2 1790D-TN0C2

Status: Description: Status: Description:

Contacting Rockwell Automation

Flashing Green/Red

Off Off line Off Off line

Off On line and no field

Green DeviceNet connection

Green Field power and open

Green Field power and valid

Flashing Red Field power and

Flashing Green Output idle Flashing Green Output idle

Flashing Red Recoverable fault Flashing Red Recoverable fault

Power up Flashing

Green/Red

Off On line and no field

power

Green DeviceNet connection

and no field power

Green Field power and open

wire

Green Field power and valid

output

Flashing Red Field power and

output out of range

Power up

power

and no field power

wire

output

output out of range

If you need to contact Rockwell Automation for assistance, please have the following information available when you call:

• a clear statement of the problem, including a description of what

the system is actually doing. Note the LED state; also note input and output image words for the module.

• a list of remedies you have already tried

• processor type and firmware number (See the label on the

processor.)

• hardware types in the system, including all I/O modules

• fault code if the processor is faulted

Publication 1790-UM001A-EN-P - March 2002

5-8 Module Diagnostics and Troubleshooting

Notes:

Publication 1790-UM001A-EN-P - March 2002

Appendix

Specifications

DeviceNet Analog Base Terminal Block

The following table contains specifications that are common to all of the blocks in this document. Individual base block specifications are detailed after this table.

Environmental Specifications

Operating Temperature

0 to 55°C (32 to 131°F) IEC 60068-2-1 (Test Ad, Operating Cold), IEC 60068-2-2 (Test Bd, Operating Dry Heat), IEC 60068-2-14 (Test Nb, Operating Thermal Shock)

Storage Temperature -40 to 85°C (-40 to 185°F)

IEC 60068-2-1 (Test Ab, Un-packaged Non-operating Cold), IEC 60068-2-2 (Test Bb, Un-packaged Non-operating Dry Heat), IEC 60068-2-14 (Test Na, Un-packaged Non-operating Thermal Shock)

Relative Humidity 5-90% non-condensing

IEC 60068-2-30 (Test Db, Un-packaged Non-operating)

Operating Altitude 2000m

Vibration IEC60068-2-6 (Test Fc, Operating):

2g @ 10-500Hz

Shock

Operating Non-operating

Emissions CISPR 11:

ESD Immunity IEC 61000-4-2:

Radiated RF Immunity IEC 61000-4-3:

EFT/B Immunity IEC 61000-4-4:

Surge Transient Immunity

IEC60068-2-27 (Test Ea, Unpackaged Shock): 10g 30g

Group 1, Class A

8kV air discharges

10V/m with 1kHz sine-wave 80%AM from 80MHz to 1000MHz 10V/m with 200Hz 50% Pulse 100%AM @ 900Mhz

1kV @ 5kHz on power ports

+2kV @ 5kHz on signal ports

2kV @ 5kHz on communications ports

IEC 61000-4-5:

1kV line-line(DM) and +2kV line-earth(CM) on power ports

1kV line-line(DM) and +2kV line-earth(CM) on signal ports

+ +

2kV line-earth(CM) on shielded ports

Conducted RF Immunity

1 Publication 1790-UM001A-EN-P - March 2002

IEC 61000-4-6: 10Vrms with 1kHz sine-wave 80%AM from 150kHzto 80MHz

A-2 Specifications

Environmental Specifications (continued)

Enclosure Type Rating None (open style)

Mounting DIN rail or screw

Dimensions 52x104x42mm (2.03x4.07x1.64in)

Weight 0.3lb (0.1kg)

DeviceNet Specifications

Network protocol I/O Slave messaging:

- Poll command

- Bit Strobe command

- Cyclic command

- COS command

Network length 500 meters maximum @ 125Kbps

100 meters maximum @ 500Kbps

Indicators 1 red/green module status

1 red/green network status

Number of nodes 64 maximum - rotary switch type node address setting

Communication rate 125Kbps, 250Kbps, 500Kbps - auto baud rate selection

Isolation Type test 1250Vac rms for 60 seconds between field power

and DeviceNet (I/O to logic)

Wiring Refer to publication DN-6.7.2

General Specifications

Wiring Category

Product Certifications (when product or packaging is marked)

(1)

c-UL-us UL Listed for Class I, Division 2 Group A,B,C,D

Hazardous Locations, certified for U.S. and Canada

(2)

European Union 89/336/EEC EMC Directive, compliant with:

EN 50081-2; Industrial Emissions EN 50082-2; Industrial Immunity EN61326; Meas./Control/Lab., Industrial Requirements EN 61000-6-2; Industrial Immunity

C-Tick

Australian Radiocommunications Act, compliant with:

AS/NZS 2064; Industrial Emissions

ODVA ODVA conformance tested to ODVA

DeviceNet specifications

(1)

Use this conductor category information for planning conductor routing as described in the system level installation manual. Refer to publication 1770-4.1 “Industrial Automation Wiring and Grounding Guidelines”.

(2)

See the Product Certification link at www.ab.com for Declarations of Conformity, Certificates, and other certification details.

Publication 1790-UM001A-EN-P - March 2002

4-Channel Analog Current Input Module

1790D-TN4C0

Inputs per module 4 channel single-ended, non-isolated

Input Current (software configurable)

Resolution 12 bits-unipolar

Converted Data Binary data

Conversion Time 10ms/channel

Overall accuracy 0.2% Full scale @0°-55°C

Calibration None required

Input Impedance 249

4-20mA (default) 0-20mA

1/4096 maximum

3.90µA/bit (4-20mA)

4.88µA/bit (0-20mA)

0000 to 0fff (max scale)

Ω

Specifications A-3

Insulation Resistance 20MΩ minimum @ 250V dc (between insulated circuits)

General Specifications

DeviceNet Power Supply voltage - 24V dc nominal

Voltage range - 11-28.8V dc Power dissipation - 1.2W maximum @ 28.8V dc

Field Power Supply Voltage - 24Vdc nominal

Voltage Range - 21.6-26.4V dc (+ Power Dissipation - 1.5W maximum @26.4V dc

Isolation I/O to logic: photocoupler isolation

Isolation voltage: Type Test 1250V ac rms for 60 seconds DeviceNet to logic: non-isolated Field power: non-isolated

Indicators 4 red/green I/O status

Wiring Terminal block connector

Screw torque: 7 inch-pounds maximum

IMPORTANT: This analog base module can accommodate a maximum of two discrete expansion modules.

10%)

Publication 1790-UM001A-EN-P - March 2002

A-4 Specifications

2-Channel Analog Current Output Module

1790D-TN0C2

Outputs per module 2 channel single-ended, non-isolated

Output Current 0-20mA

Resolution 12 bits

1/4096 maximum

4.88µA/bit

Converted Data Binary data

0000 to 0fff (max scale)

Conversion Time 2ms/channel

Overall accuracy 0.2% Full scale @0°-55°C

Calibration None required

Allowable external output load resistance

600

Ω maximum

Insulation Resistance 20M

General Specifications

DeviceNet Power Supply voltage - 24V dc nominal

Field Power Supply Voltage - 24Vdc nominal

Isolation I/O to logic: photocoupler isolation

Indicators 2 red/green I/O status

Wiring Terminal block connector

IMPORTANT: This analog base module can accommodate a maximum of two discrete expansion modules.

Ω minimum @ 250V dc (between insulated circuits)

Voltage range - 11-28.8V dc Power dissipation - 1.2W maximum @ 28.8V dc

Voltage Range - 21.6-26.4V dc (+ Power Dissipation - 1.5W maximum @26.4V dc

Isolation voltage: Type Test 1250V ac rms for 60 seconds DeviceNet to logic: non-isolated Field power: non-isolated

Screw torque: 7 inch pounds maximum

10%)

Publication 1790-UM001A-EN-P - March 2002

4-Channel Analog Voltage Input Module

1790D-TN4V0

Inputs per module 4 channel single-ended, non-isolated

Input Voltage 0-10V

Resolution 12 bits-unipolar

1/4096 maximum

2.44mV/bit

Converted Data Binary data

0000 to 0fff (max scale)

Conversion Time 10ms/channel

Overall accuracy 0.2% Full scale @0°-55°C

Calibration None required

Input Impedance 500K

Ω minimum

Specifications A-5

Insulation Resistance 20M

General Specifications

DeviceNet Power Supply voltage - 24V dc nominal

Field Power Supply Voltage - 24Vdc nominal

Isolation I/O to logic: photocoupler isolation

Indicators 4 red/green I/O status

Wiring Terminal block connector

IMPORTANT: This analog base module can accommodate a maximum of two discrete expansion modules.

Ω minimum @ 250V dc (between insulated circuits)

Voltage range - 11-28.8V dc Power dissipation - 1.2W maximum @ 28.8V dc

Voltage Range - 21.6-26.4V dc (+ Power Dissipation - 1.5W maximum @26.4V dc

Isolation voltage: Type Test 1250V ac rms for 60 seconds DeviceNet to logic: non-isolated Field power: non-isolated

Screw torque: 7 inch pounds maximum

10%)

Publication 1790-UM001A-EN-P - March 2002

A-6 Specifications

2-Channel Analog Voltage Output Module

1790D-TN0V2

Outputs per module 2 channel single-ended, non-isolated

Output Voltage 0-10V

Resolution 12 bits-unipolar

1/4096 maximum

2.44mV/bit

Converted Data Binary data

0000 to 0fff (max scale)

Conversion Time 2ms/channel

Overall accuracy 0.2% Full scale @0°-55°C

Calibration None required

Allowable external output load resistance

Ω minimum

Output Impedance 0.5

Insulation Resistance 20M

General Specifications

DeviceNet Power Supply voltage - 24V dc nominal

Field Power Supply Voltage - 24Vdc nominal

Isolation I/O to logic: photocoupler isolation

Indicators 2 red/green I/O status

Wiring Terminal block connector

IMPORTANT: This analog base module can accommodate a maximum of two discrete expansion modules.

Ω maximum

Ω minimum @ 250V dc (between insulated circuits)

Voltage range - 11-28.8V dc Power dissipation - 1.2W maximum @ 28.8V dc

Voltage Range - 21.6-26.4V dc (+ Power Dissipation - 1.5W maximum @26.4V dc

Isolation voltage: Type Test 1250V ac rms for 60 seconds DeviceNet to logic: non-isolated DeviceNet power: non-isolated Field power: non-isolated

Screw torque: 7 inch pounds maximum

10%)

Publication 1790-UM001A-EN-P - March 2002

Appendix

PROFIBUS Modules Installation, Wiring, Module Data, Status and Channel Configuration

This appendix tells you how to:

• determine the power requirements for the PROFIBUS modules

• avoid electrostatic damage

• install the module

• view the module memory map

• access the input image file

• configure channels

Power Requirements

Modules require external supplies for both system power and for the analog I/O channels. Table B.1 lists the maximum power.

Table B. 1

PROFIBUS Power Supply voltage - 24V dc nominal

Voltage range - 19.2 - 28.8V dc Power dissipation - 2W maximum @ 28.8V dc

Field Power Supply voltage - 24V dc nominal

Voltage range - 21.6 - 26.4V dc (+ Power dissipation - 1.5W maximum @ 26.4V dc

10%)

1 Publication 1790-UM001A-EN-P - March 2002

B-2 PROFIBUS Modules Installation, Wiring, Module Data, Status and Channel Configuration

Module Installation

CompactBlock LDX is suitable for use in a commercial or light industrial environment when installed in accordance with these instructions. Specifically, this equipment is intended for use in clean,

(1)

dry environments (Pollution degree 2 Over Voltage Category II

(2)

(IEC 60664-1)

) and to circuits not exceeding

(3)

Prevent Electrostatic Discharge

ATTENTION

• Touch a grounded object to discharge potential

static.

• Wear an approved grounding wriststrap.

• Do not touch connectors or pins on component

boards.

• Do not touch circuit components inside the

equipment.

• If available, use a static-safe workstation.

• When not in use, store the module inits box.

Publication 1790-UM001A-EN-P - March 2002

(1)

Pollution Degree 2 is an environment where, normally, only non-conductive pollution occurs except that occasionally a temporary conductivity caused by condensation shall be expected.

(2)

Over Voltage Category II is the load level section of the electrical distribution system. At this level, transient voltages are controlled and do not exceed the impulse voltage capability of the product’s insulation.

(3)

Pollution Degree 2 and Over Voltage Category II are International Electrotechnical Commission (IEC) designations.

PROFIBUS Modules Installation, Wiring, Module Data, Status and Channel Configuration B-3

Environment and Enclosure

ATTENTION

This equipment is supplied as "enclosed" equipment. It should not require additional system enclosure when used in locations consistent with the enclosure type ratings stated in the Specifications section of this publication. Subsequent sections of this publication may contain additional information regarding specific enclosure type ratings, beyond what this product provides, that are required to comply with certain product safety certifications.

Publication 1790-UM001A-EN-P - March 2002

B-4 PROFIBUS Modules Installation, Wiring, Module Data, Status and Channel Configuration

Remove Power

General Considerations

ATTENTION

Remove power before removing or inserting this module or expansion module. When you remove or insert a module with power applied, an electrical arc may occur. An electrical arc can cause personal injury or property damage by:

• sending an erroneous signal to your system’s field

devices, causing unintended machine motion.

• causing an explosion in a hazardous

environment.

Electrical arcing causes excessive wear to contacts on both the module and its mating connector and may lead to premature failure.

Reducing Noise

• away from sources of electrical noise such as hard-contact

switches, relays, and AC motor drives

• away from modules which generate significant radiated heat.

In addition, route shielded, twisted-pair analog input and output wiring away from any high voltage I/O wiring.

Protecting the Circuit Board from Contamination

Publication 1790-UM001A-EN-P - March 2002

PROFIBUS Modules Installation, Wiring, Module Data, Status and Channel Configuration B-5

Installing CompactBlock LDX I/O

Follow these steps to install the block:

1. Set the Station Address on the Base Block

2. Mount the Base Block

3. Connect the PROFIBUS DP Terminal Connector

4. Connect Power to the Block

Set the Station Address on the Base Block

To set the station address, adjust the switches on the front of the base block. The two siwtches are most significant digit (MSD) and least significant digit (LSD). The switches can be set between 00 and 99 and are read at base block power-up only. Figure B.1 shows an example base block set for station address 11.

Figure B.1

NODE ADDRESS

MOD NET

STATUS

LSDMSD

43216

Mount the Base Block

You can mount the base block to a panel or DIN rail. We recommend that you ground the panel or DIN rail before mounting the block.

IMPORTANT

WARNING

The analog base module can accommodate a maximum of two discrete expansion modules.

When used in a Class I, Division 2, hazardous location, this equipment must be mounted in a suitable enclosure with proper wiring method that complies with the governing electrical codes.

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B-6 PROFIBUS Modules Installation, Wiring, Module Data, Status and Channel Configuration

Panel Mounting

1. Place the block against the panel where you want to mount it.

2. Gently pull and position the expansion cover to the left.

3. Place a center punch, nail or similar device through the

mounting holes in the block and make two marks on the panel (lower left and upper right corners of the module).

4. Remove the block and drill two holes in the panel to

accommodate each of the mounting screws.

Replace the block on the panel and place a screw through each of the

two mounting holes. Tighten the screws until the block is firmly in place.

95mm

3.74in

CompactB

1790-16BVOX

41mm

1.6in

EXPANSION UNIT

16 INPUTS-DCPOWER

Expansion Cover

DIN Rail Mounting

1. Hook the top of slot of the block over the DIN Rail.

Pull down on the locking lever while pressing the block against the rail.

Locking Lever

3. Push up on the locking lever to secure the block to the rail

when block is flush against the rail.

Publication 1790-UM001A-EN-P - March 2002

Horizontal mounting

PROFIBUS Modules Installation, Wiring, Module Data, Status and Channel Configuration B-7

Mount the Optional Expansion Blocks

Mount the expansion block by connecting it to a previously-installed CompactBlock LDX I/O base or expansion block.

Beginning with the base block, you can mount your expansion blocks either horizontally or vertically:

• horizontally (left to right) - add expansion blocks in a

end-to-end configuration

• vertically (up or down) - add expansion blocks either up or

down in a back-to-back configuration. In this configuration, you must use the optional 15cm ribbon cable (1790-15CMCBL) and alternately position the blocks in a right-side up, upside-down fashion.

Vertical mounting

You can mount your blocks on a panel or DIN rail as described in the previous section.

The longer expansion cable (1790-15CMCBL) allows up to 7cm of space between blocks.

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B-8 PROFIBUS Modules Installation, Wiring, Module Data, Status and Channel Configuration

Connect the PROFIBUS DP Terminal Connector

Follow these procedures when connecting the PROFIBUS DP terminal connector to the base block.

WARNING

The required PROFIBUS female 9-pin D-sub connector is not supplied with the base block; you must purchase it separately. Before you connect female 9-pin D-sub connector to the base block, make sure it is wired correctly, as shown in Table B.2.

Table B . 2 Wiring Connections

Pin Number: Name: Description:

If you connect or disconnect the PROFIBUS cable with power applied to this module or any device on the network, an electrical arc can occur. This could cause an explosion in hazardous location installations. Be sure that power is removed or the area is nonhazardous before proceeding.

1 Shield Shield, Protective Ground

2 M24V Minus 24V Output Voltage

3 RxD/TxD-P Receive/Transmit-Data-P

4 CNTR-P Control-p

5 DGND Data Ground

6 VP Voltage-Plus

7 P24V Plus 24V Output Voltage

8 RxD/TxD-N Receive/Transmit-Data-N

9 CNTR-N Control-N

Publication 1790-UM001A-EN-P - March 2002

PROFIBUS Modules Installation, Wiring, Module Data, Status and Channel Configuration B-9

Once you have properly wired the connector, attach it to the base block as shown in . Use the locking screws on the connector to fasten it to the base block.

Figure B.2

PROFIBUS

Green - GND Black - COM Red - +24V dc

Connector

Connect Power to the Block

To apply power to the block, refer to Figure B.2.

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B-10 PROFIBUS Modules Installation, Wiring, Module Data, Status and Channel Configuration

Connecting I/O Wiring

Consider the following guidelines when wiring your system:

General Guidelines

• All module commons (ANLG COM) are connected in the analog

module. The analog common (ANLG COM) is not connected to earth ground inside the module.

• Channels are not isolated from each other.

• Do not use the analog module’s NC terminals as connection

points.

• To ensure optimum accuracy, limit overall cable impedance by

keeping your cable as short as possible. Locate the I/O system as close to your sensors or actuators as your application will permit.

• Use Belden™ 8761, or equivalent, shielded wire.

• Keep shield connection to ground as short as possible.

• Under normal conditions, the drain wire and shield junction

must be connected to earth ground via a panel or DIN rail mounting screw at the analog I/O module end.

Guidelines for Input Modules

• If multiple power supplies are used with analog inputs, the

power supply commons must be connected together.

• The module does not provide loop power for analog inputs. Use

a power supply that matches the input transmitter specifications.

Guidelines for Output Modules

• Current outputs (CH0 and CH1) of the 1790P-TNOC2 module

source current that returns to COM. Load resistance for a current output channel must remain between 0 and 600

Ω .

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PROFIBUS Modules Installation, Wiring, Module Data, Status and Channel Configuration B-11

Wiring the Modules

ATTENTION

Never connect a voltage or current source to an analog output channel.

signal wire

cable

Cut foil shield and drain wire

signal wire signal wiredrain wire foil shield

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B-12 PROFIBUS Modules Installation, Wiring, Module Data, Status and Channel Configuration

To wire your module follow these steps.

1. At each end of the cable, strip some casing to expose the

individual wires.

2. Trim the signal wires to 2-inch lengths. Strip about 3/16 inch (5

mm) of insulation away to expose the end of the wire.

ATTENTION

Be careful when stripping wires. Wire fragments that fall into a module could cause damage at power up.

3. At one end of the cable, twist the drain wire and foil shield

together.

In environments where high frequency noise may be present, it may be necessary to ground the cable shields to earth at the module end via a 0.1µF capacitor at the sensor end for analog inputs and at the load end for analog outputs.

4. At the other end of the cable, cut the drain wire and foil shield

back to the cable.

Publication 1790-UM001A-EN-P - March 2002

5. Connect the signal wires to the terminal block as shown in

Analog Input Wiring on page B-13 and Analog Output Wiring on page B-14.

6. Connect the other end of the cable to the analog input or output

device.

7. Repeat steps 1 through 5 for each channel on the module.

PROFIBUS Modules Installation, Wiring, Module Data, Status and Channel Configuration B-13

Analog Input Wiring

Use the information in Table B.3 and Figure B.3 to wire the 1790P-TN4C0 terminal block modules.

Table B. 3 1790P-TN4C0 Pin Descriptions

Pin Number: 135791113151719

Description:

Pin Number: 2468101214161820

Description:

(1)

+24V: Field Power (+) 24V dc

(2)

GND: Field Power (-) Ground

+24V

GND

(1)

CH0 CH1 CH2 CH3 NC NC NC NC NC

(2)

COM COM COM COM NC NC NC NC NC

Figure B.3

+24V

GND

+ –

24V dc

CH0

COM

–

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B-14 PROFIBUS Modules Installation, Wiring, Module Data, Status and Channel Configuration

Analog Output Wiring

Use the information in Table B.4 and Figure B.4 to wire the 1790P-TN0C2 terminal block modules.

Table B . 4 1790P-TN0C2 Pin Descriptions

Pin Number: 135791113151719

Description:

Pin Number: 2468101214161820

Description:

(1)

+24V: Field Power (+) 24V dc

(2)

GND: Field Power (-) Ground

+24V

GND

(1)

CH0 CH1 NC NC NC NC NC NC NC

(2)

COM COM NC NC NC NC NC NC NC

Figure B.4

+24V

GND

+ – +

24V dc

CH0

COM

–

43226

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PROFIBUS Modules Installation, Wiring, Module Data, Status and Channel Configuration B-15

1790P-TN4C0 Data Structure

Analog Input Image

Input words 5 and 6 contain input data for two optional discrete input expansion modules.

1790P-N4C0/TN4C0 Configuration

Each analog current input may be configured for either the 4-20mA or 0-20mA range. This is most easily accomplished using the programming software compatible with the controller or scanner. See page B-16 for an example of configuration using the SST PROFIBUS Configuration Tool.

Analog input data is presented as raw/proportional. The full 12-bit resolution is used over the entire span of the input full scale range, as shown in Table B.5.

Table B. 5

Input Full Scale Range:

4-20mA 0000-0FFF 0-4095 3.90

0-20mA 0000-0FFF 0-4095 4.88

The input data files are the same as those shown for the 1790D-TN4CO. See page 3-2 for more information.

HEX Data Range: Decimal Data

Range:

Input Resolution:

µA µA

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B-16 PROFIBUS Modules Installation, Wiring, Module Data, Status and Channel Configuration

1790P-TNOC2 Data Structure

Analog Output Image

Output words 2 and 3 contain output data for two optional discrete output expansion modules.

Analog output data is presented as raw/proportional. The full 12-bit resolution is over the entire span of the output full scale range, as shown in Table B.6.

Table B . 6

Output Full Scale Range:

0-20mA 0000-0FFF 0-4095 4.88

The output data files are the same as those shown for the 1790D-TNOC2. See page 4-2 for more information.

HEX Data Range: Decimal Data

Range:

Input Resolution:

µA

Output Fault and Idle States

Configuring PROFIBUS Analog Modules

For PROFIBUS modules, analog outputs reset to zero (0) under fault (communication failure) and idle (processor in program mode) states. The values in the output data file are retained. Once a fault or idle condition is cleared, the retained output values are sent to the analog output channels.

You can use the PROFIBUS configuration software (with easy-to-use GSD files) to configure the CompactBlock LDX analog modules (1790P-TN4CO & 1790P-TNOC2).

To obtain GSD files, go to:

http://www.ab.com/networks/gsd

To read how to install the GSD file for your module, use the SST PROFIBUS configuration tool documentation (e.g. online help). The next section shows how to configure your analog module with the SST PROFIBUS configuration tool.

Publication 1790-UM001A-EN-P - March 2002

PROFIBUS Modules Installation, Wiring, Module Data, Status and Channel Configuration B-17

Configuring Analog Modules with the SST PROFIBUS Configuration Tool

A. Open the Masters

and the SST folders.

B. Choose your

PROFIBUS master.

C. Drag and drop the

master onto the network.

The following configuration example shows how to configure your analog modules with the SST PROFIBUS configuration tool. Follow these steps:

1. Open your SST PROFIBUS configuration tool. If you are online,

make sure the processor is in Program mode.

2. Add the PROFIBUS master to your network.

Change any necessary information and either:

• click to another tab

• click OK

3. Double-click on the master’s icon to see the device properties

pop-up screens. The first screen is the General properties.

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B-18 PROFIBUS Modules Installation, Wiring, Module Data, Status and Channel Configuration

4. Add slaves to the network.

A. If necessary, use the

search button to see a list of stations on the network.

B. Select the station. C. Right-click to see

pop-up menu.

D. Choose the

appropriate GSD file and the module appears on the network as shown.

A. Right-click on the

module to see the pop-up menu.

B. Select Properties.

5. Access the module’s properties.

Publication 1790-UM001A-EN-P - March 2002

A. Make sure the

station number is correct.

B. Click on other

tabs or OK when finished on this screen.

PROFIBUS Modules Installation, Wiring, Module Data, Status and Channel Configuration B-19

6. Use the pop-up screen shown below to change the module’s

properties.

A. Click on the

Modules tab.

B. Click on Add.

C. Choose the

module.

D. Click on OK.

7. If necessary, add additional modules as shown below.

The following screen appears to add modules.

Up to two expansion modules may be added to analog base modules.

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B-20 PROFIBUS Modules Installation, Wiring, Module Data, Status and Channel Configuration

8. Set the I/O type. This screen also shows the data size

information.

A. Click on the SLC

Addresses tab.

B. Choose the Input.

This example uses the I Type input.

9. Set the Watchdog Time Base and Current Range.

A. Click on the Ext.

Prms tab.

B. Use the pull-down

menu to change the Watchdog Tim e Bas e.

C. Use the pull-down

menu to change the Current Range.

D. Click OK when

finished.

Publication 1790-UM001A-EN-P - March 2002

10. Save the configuration file.

PROFIBUS Modules Installation, Wiring, Module Data, Status and Channel Configuration B-21

Downloading Configuration

A. Right-click on the

master to see the pull-down menu.

B. Click on Connect.

To download configuration to the module, follow these steps:

1. Make sure the serial communication cable is connected between

the PC com port and the scanner serial port.

2. Verify that the processor is in Program mode.

3. Use the SST PROFIBUS configuration tool to connect to the

master.

Click on OK to retain your configuration.

4. You may be notified about a configuration mismatch between

what is in the scanner and your current PROFIBUS project. Choose YES to retain your configuration.

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B-22 PROFIBUS Modules Installation, Wiring, Module Data, Status and Channel Configuration

Any configuration mismatches are displayed in the software, as shown in the screen below.

This example shows a mismatch in the master configuration.

A. Right-click on the

master to see the pull-down menu.

B. Click on Load

Configuration.

5. Load configuration to the master.

Publication 1790-UM001A-EN-P - March 2002

6. If the scanner is online, the software prompts you and asks if

you want to load configuration. Choose YES.

This master is in Configured Program mode.

PROFIBUS Modules Installation, Wiring, Module Data, Status and Channel Configuration B-23

The master status changes to the Configured Program mode.

7. Change the processor to Run mode. In addition to solid green

indicator lights on the module, you should see the screen below.

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B-24 PROFIBUS Modules Installation, Wiring, Module Data, Status and Channel Configuration

PROFIBUS DP Specifications

Table B.7 lists the module specifications.

Table B . 7 PROFIBUS DP Specifications

Network Protocol PROFIBUS–DP (EN50170)

Redundancy Not supported

Repeater Control Signal RS-485 signal

Implementation Type DPC31

Freeze Mode Supported

Sync Mode Supported

Auto Baud Rate Supported

Fail Safe Mode Supported

Station Type Slave

FMS Support Not supported

Indicators 1 red/green - module status

1 red/green - network status

Number of Nodes 100 maximum - roatary switch type node address

setting (0-99)

Network Length/Communication Rate 9.6Kbps @ 1000m (3280ft)

19.2Kbps @ 1000m (3280ft)

45.45Kbps @ 1000m (3280ft)

93.75Kbps @ 1000m (3280ft)

187.5Kbps @ 1000m (3280ft) 500Kbps @ 400m (1312ft)

1.5mbps @ 200m (656ft) 3mbps @ 100m (328ft) 6mbps @ 100m (328ft) 12mbps @ 100m (328ft)

Publication 1790-UM001A-EN-P - March 2002

Isolation Type test 1250Vac rms for 60 seconds between

field power and PROFIBUS (I/O to logic)

PROFIBUS Power Supply voltage - 24V dc nominal

Voltage range - 19.2-28.8V dc Power dissipation - 2W maximum @ 28.8V dc

Field Power Supply voltage - 24V dc nominal

Voltage range - 21.6-26.4V dc Power dissipation - 1.5W maximum @ 26.4V dc

PROFIBUS Modules Installation, Wiring, Module Data, Status and Channel Configuration B-25

Summary

This appendix describes PROFIBUS Modules Installation, Wiring, Module Data, Status and Channel Configuration with the SST PROFIBUS Configuration tool.

For more information, consult your PROFIBUS network, scanner and network configuration tool documentation.

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B-26 PROFIBUS Modules Installation, Wiring, Module Data, Status and Channel Configuration

Notes:

Publication 1790-UM001A-EN-P - March 2002

Glossary

The following terms and abbreviations are used throughout this manual. For definitions of terms not listed here refer to Allen-Bradley’s Industrial Automation Glossary, Publication AG-7.1.

A/D Converter– Refers to the analog to digital converter inherent to the module. The converter produces a digital value whose magnitude is proportional to the magnitude of an analog input signal.

analog input module – A module that contains circuits that convert analog voltage or current input signals to digital values that can be manipulated by the processor.

channel – Refers to analog input or output interfaces available on the module’s terminal block. Each channel is configured for connection to a variable voltage or current input or output device, and has its own data and diagnostic status words.

channel update time – The time required for the module to sample and convert the input signals of one enabled input channel and update the channel data word.

configuration word – Contains the channel configuration information needed by the module to configure and operate each channel.

D/A Converter – Refers to the digital to analog converter inherent to the output module. The converter produces an analog dc voltage or current signal whose instantaneous magnitude is proportional to the magnitude of a digital value.

data word – A 16-bit integer that represents the value of the analog input or output channel. The channel data word is valid only when the channel is enabled and there are no channel errors. When the channel is disabled the channel data word is cleared (0).

full scale – The magnitude of voltage or current over which normal operation is permitted.

full scale error – (gain error) The difference in slope between the actual and ideal analog transfer functions.

full scale range – (FSR) The difference between the maximum and minimum specified analog input values.

1 Publication 1790-UM001A-EN-P - March 2002

Glossary 2

input image – The input from the module to the controller. The input image contains the module data words and status bits.

LSB – (Least Significant Bit) The bit that represents the smallest value within a string of bits.

For analog modules, the LSB is defined as the rightmost bit, bit 0, of the 16-bit field.

linearity error – An analog input or output is composed of a series of voltage or current values corresponding to digital codes. For an ideal analog input or output, the values lie in a straight line spaced by a voltage or current corresponding to 1 LSB. Any deviation of the converted input or actual output from this line is the linearity error of the input or output. The linearity is expressed in percent of full scale input or output. See the variation from the straight line due to linearity error (exaggerated) in the example below.

Actual Transfer Function

Ideal Transfer

number of significant bits – The power of two that represents the total number of completely different digital codes an analog signal can be converted into or generated from.

module scan time – same as module update time

module update time – For input modules, the time required for the

module to sample and convert the input signals of all enabled input channels and make the resulting data values available to the processor. For output modules, the time required for the module to receive the digital code from the processor, convert it to the analog output signal, and send it to the output channel.

multiplexer – An switching system that allows several signals to share a common A/D or D/A converter.

normal operating range – Input or output signals are within the configured range. See for a list of input and output types/ranges.

Publication 1790-UM001A-EN-P - March 2002

Glossary 3

overall accuracy – The worst-case deviation of the output voltage or current from the ideal over the full output range is the overall accuracy. For inputs, the worst-case deviation of the digital representation of the input signal from the ideal over the full input range is the overall accuracy. this is expressed in percent of full scale.

Gain error, offset error, and linearity error all contribute to input and output channel accuracy.

output accuracy – The difference between the actual analog output value and what is expected, when a given digital code is applied to the d/a converter. Expressed as a ± percent of full scale. The error will include gain, offset and drift elements, and is defined at 25°C, and also over the full operating temperature range (0 to 60°C).

output image – The output from the controller to the output module. The output image contains the analog output data.

analog output module – An I/O module that contains circuits that output an analog dc voltage or current signal proportional to a digital value transferred to the module from the processor.

repeatability – The closeness of agreement among repeated measurements of the same variable under the same conditions.

resolution – The smallest detectable change in a measurement, typically expressed in engineering units (e.g. 1 mV) or as a number of bits. For example a 12-bit system has 4095 possible output states. It can therefore measure 1 part in 4095.

status word – Contains status information about the channel’s current configuration and operational state. You can use this information in your ladder program to determine whether the channel data word is valid.

step response time – For inputs, this is the time required for the channel data word signal to reach a specified percentage of its expected final value, given a large step change in the input signal.

update time – see “module update time”

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Glossary 4

Notes:

Publication 1790-UM001A-EN-P - March 2002

Index

A/D

definition

abbreviations Glossary-1

analog input module

definition

overview 1-1

Glossary-1

channel

definition

channel diagnostics 5-4 channel status LED 1-4

channel update time

definition

configuration word

definition

contacting Rockwell Automation 5-7

current draw

1769-IF4

1769-OF2 2-1

Glossary-1

Glossary-1 Glossary-1

2-1

D/A converter

definition

data word

definition

definition of terms Glossary-1

Glossary-1 Glossary-1

electrical noise 2-3

fault condition

at power-up

FSR. See full scale range. full scale

definition

full scale error

definition

full scale range

definition

1-4

Glossary-1 Glossary-1 Glossary-1

gain error. See full scale error.

heat considerations 2-3

input image

definition

installation 2-1–??

heat and noise considerations 2-3

Glossary-2

least significant bit. See LSB.

5-1

LED linearity error

definition

LSB

definition

Glossary-2 Glossary-2

module scan time

definition

module update time

definition

multiplexer

definition

Glossary-2 Glossary-2 Glossary-2

number of significant bits

definition

Glossary-2

open-circuit detection 5-4

operation

1-4

system

out-of-range detection 5-4

output image

definition

overall accuracy

definition

Glossary-3 Glossary-3

power-up diagnostics 5-3 power-up sequence 1-4 program alteration 5-2

Publication 1790-UM001A-EN-P - March 2002

2 Index

resolution

definition

Glossary-3

safety circuits 5-2 scan time Glossary-2 specifications A-1

status word

definition

step response time

definition

system operation 1-4

Glossary-3 Glossary-3

troubleshooting

safety considerations

update time. See channel update time. update time. See module update time.

wiring 2-1

input module 2-15–?? input terminal layout 2-15, 2-16, 2-17,

2-18

modules 2-13 output module 2-16, 2-18 routing considerations 2-3

5-1

Publication 1790-UM001A-EN-P - March 2002

Rockwell Automation 1790D-NOV2, 1790DTNOV2 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

CompactBlock LDX Analog Modules

Important User Information

Rockwell Automation Support

Preface

Who Should Use This Manual

How to Use This Manual

Conventions Used in This Manual

Table of Contents

How to Use Analog I/O

General Description

System Overview

Power Requirements

Module Installation

General Considerations

Installing CompactBlock LDX I/O

I/O System Wiring Guidelines

Analog Input Data Format

Configuring Analog Input Module

Configuring Analog Modules With RSNetWorx

Analog Output Data Format

Output Fault and Idle States

Configuring Analog Output Module

Safety Considerations

Module Operation vs. Channel Operation

Power-up Diagnostics

Channel Diagnostics

Module Errors

Channel LED Indicator Operation

Contacting Rockwell Automation

Power Requirements

Module Installation

General Considerations

Installing CompactBlock LDX I/O

Connecting I/O Wiring

1790P-TN4C0 Data Structure

1790P-TNOC2 Data Structure

Output Fault and Idle States

Configuring PROFIBUS Analog Modules

Configuring Analog Modules with the SST PROFIBUS Configuration Tool

Downloading Configuration

PROFIBUS DP Specifications

Summary

Glossary

Index