Rockwell Automation Allen-Bradley 1794-IJ2 User Manual

FLEX I/O Frequency Input Module

Catalog Numbers 1794-IJ2, 1794-IJ2K, 1794-IJ2XT

User Manual

Important User Information

Solid state equipment has operational characteristics differing from those of electromechanical equipment. Safety Guidelines for the Application,

Installation and Maintenance of Solid State Controls (publication SGI-1.1

available from your local Rockwell Automation sales office or online at http://literature.rockwellautomation.com

) describes some important differences between solid state equipment and hard-wired electromechanical devices. Because of this difference, and also because of the wide variety of uses for solid state equipment, all persons responsible for applying this equipment must satisfy themselves that each intended application of this equipment is acceptable.

In no event will Rockwell Automation, Inc. be responsible or liable for indirect or consequential damages resulting from the use or application of this equipment.

The examples and diagrams in this manual are included solely for illustrative purposes. Because of the many variables and requirements associated with any particular installation, Rockwell Automation, Inc. cannot assume responsibility or liability for actual use based on the examples and diagrams.

No patent liability is assumed by Rockwell Automation, Inc. with respect to use of information, circuits, equipment, or software described in this manual.

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

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

WARNING

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

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

ATTENTION

Identifies information about practices or circumstances that can lead to: personal injury or death, property damage, or economic loss. Attentions help you identify a hazard, avoid a hazard, and recognize the consequence.

SHOCK HAZARD

Labels may be on or inside the equipment, such as a drive or motor, to alert people that dangerous voltage may be present.

BURN HAZARD

Labels may be on or inside the equipment, such as a drive or motor, to alert people that surfaces may reach dangerous temperatures.

Allen-Bradley, Rockwell Automation, FLEX I/O, RSLinx, RSLogix 5000 and TechConnect are trademarks of Rockwell Automation, Inc.

Trademarks not belonging to Rockwell Automation are property of their respective companies.

New and Updated

Information

Summary of Changes

This manual contains new and updated information. Changes throughout this revision are marked by change bars, as shown to the right of this paragraph.

This table contains the changes made to this revision.

Topic

Inclusion of two catalogs, 1794-IJ2K and 1794-IJ2XT

The first chapter has been updated with the following topics:

•The FLEX System

•Type of Modules

•The FLEX I/O Module in a Logix Control System

The wiring illustration for terminal base units has been updated.

The following topics have been added:

20

•Configure Your FLEX I/O Module with RSLogix 5000

(Chapter 3)

•Troubleshoot the Module (Chapter 5)

•Electronic Data Sheet (EDS) Files

The Specifications topic (Appendix A) has been updated to include specifications for 1794-IJ2K, and 1794-IJ2XT.

"Program Your Module" is now moved to the appendices section. It was previously Chapter 3 in the last revision.

29

69

35

59

55

Page

1

1

iii Publication 1794-6.5.11 - September 2011

iv Summary of Changes

Notes:

Publication 1794-6.5.11 - September 2011

v

Table of Contents

Summary of Changes

New and Updated Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii

Preface

Who Should Use This Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix

Purpose of the Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix

About the Vocabulary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix

Related Documentation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . x

Common Techniques Used in this Manual. . . . . . . . . . . . . . . . . . . . . . xii

Overview of the Frequency Input

Module

Chapter 1

Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

The FLEX System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Type of Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Usage of the Frequency Input Module . . . . . . . . . . . . . . . . . . . . . . . . . . 2

The FLEX I/O Module in a Logix Control System . . . . . . . . . . . . . . . 3

Typical Applications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Input Capabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Selecting the Modes of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Output Capabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Implementing Application Features . . . . . . . . . . . . . . . . . . . . . . . . . 7

How Frequency Is Calculated . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Frequency Calculation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Termination on Number of Pulses . . . . . . . . . . . . . . . . . . . . . . . . . 10

Missing Pulse Multiplier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Direction Detection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Chapter Summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Install Your FLEX I/O Frequency

Input Module

Chapter 2

Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Before You Install Your Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Install the Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Mount on a DIN Rail . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Mount on a Panel or Wall . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Mount the Frequency Input Module on the Terminal Base

Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Wiring Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Wiring the Terminal Base Units (1794-TB3G shown) . . . . . . . . . 20

Wire the Terminal Base Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Connect Wiring to the FLEX I/O Frequency Input Module . . . . 21

Connecting Wiring Using a 1794-TB3G, 1794-TB3GK or

1794-TB3GS Terminal Base Unit . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Resolution and Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Examples of Wiring to a 1794-TB3G Terminal Base Unit . . . . . . 27

Chapter Summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Publication 1794-6.5.11 - September 2011

vi Table of Contents

Configure Your FLEX I/O Module with RSLogix 5000 Software

Chapter 3

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Add and Configure the FLEX I/O Module. . . . . . . . . . . . . . . . . . . . . 29

Chapter Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Troubleshoot the Module

Read and Write Configuration

Maps for the FLEX I/O Module

Specifications

Chapter 4

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Status Indicators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Diagnostics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Diagnostic Bits in Word 5 of the BTR File . . . . . . . . . . . . . . . . . 37

Chapter Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Chapter 5

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Configure Your Frequency Input Module . . . . . . . . . . . . . . . . . . . . . . 39

Read Data From Your Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Map Data for the Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Frequency Input Module Image Table Mapping . . . . . . . . . . . . . 40

Chapter Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Appendix A

What This Appendix Contains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Appendix B

Electronic Data Sheet (EDS) Files

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Updating EDS File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

EDS Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Schematics

Appendix C

What This Appendix Contains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Gate Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Output Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

Digital Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

DC to DC Converters – 24V DC Power Supplies . . . . . . . . . . . . 63

Programming Your Module with

PLC Processors

Appendix D

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Enter Block Transfer Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

PLC-2 Family Processor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

PLC-3 Family Processor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

PLC-5 Family Processor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

PLC-5/250 Family Processor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Index

Publication 1794-6.5.11 - September 2011

ix

Who Should Use This

Manual

Purpose of the Manual

Preface

Read this preface to familiarize yourself with the rest of the manual. It provides information concerning:

• who should use this manual

• the purpose of this manual

• related documentation

• conventions used in this manual

• terminology used in this manual

We assume that you have previously used an Allen-Bradley programmable controller, that you are familiar with its features, and that you are familiar with the terminology we use. If not, read the user manual for your processor before reading this manual.

This manual is a reference guide for the 1794 Frequency Input Modules. It describes the procedures for installing, configuring and troubleshooting your module.

For information on

Overview of the Frequency Input Module

Install Your FLEX I/O Frequency Input Module

Configure Your FLEX I/O Module with RSLogix 5000 Software

Read and Write Configuration Maps for the FLEX I/O Module

Troubleshoot the Module

Specifications

Electronic Data Sheet (EDS) Files

Schematics

Program Your Module with PLC Processors

See

Chapter 1

Chapter 2

Chapter 3

Chapter 4

Chapter 4

Appendix A

Appendix B

Appendix C

Appendix D

About the Vocabulary

In this manual, we refer to:

• the frequency input module as the “input module”

• the Programmable Controller as the “controller”

Publication 1794-6.5.11 - September 2011

x Preface

Related Documentation

The following documents contain additional information concerning Rockwell

Automation products. To obtain a copy, contact your local

Rockwell Automation office or distributor.

Resource Description

FLEX I/O Product Profile, publication 1794-PP019 xxxxx Comprehensive product profile for the FLEX I/O product line.

FLEX I/O ControlNet Redundant Media Adapter, publication 1794-5.18

x xxxx

FLEX I/O EtherNet/IP Adapter Module Installation

Instructions, publication 1794-IN082 x xxxx

FLEX I/O ControlNet Adapter Module Installation

Instructions, publication 1794-IN128 x xxxx

Information on how to install the FLEX I/O ControlNet Redundant Media

Adapter (1794-ACNR).

Information on how to install the FLEX I/O EtherNet/IP Adapter Module

(Catalog No. 1794-AENT).

Information on how to install the ControlNet Adapter Modules

(Catalog No. 1794-ACN15, 1794-ACN15K, 1794-ACNR15, 1794-ACNR15XT,

Series D).

FLEX I/O DeviceNet Adapter Module Installation

Instructions, publication 1794-IN099 x xxxxxxxxxxxxx

Remote I/O Adapter Modules Installation Instructions, publication 1794-IN098 x xxxxxxxxxxxxx

Remote I/O Adapter Module User Manual, publication

1794-UM009 x xxxxxxxxxxxxx

FLEX I/O PROFIBUS Adapter Module Installation

Instructions, publication 1794-IN087 x xxxxxxxxxxxxx

Information on how to install the FLEX I/O DeviceNet Adapter Modules

(Catalog No. 1794-ADN, 1794-ADNK).

Information on how to install the Remote I/O Adapter Modules

(Catalog No. 1794-ASB, 1794-ASB2, 1794-ASBK, 1794-ASB2K).

Information on how to use the Remote I/O Adapter Module

(Catalog No. 1794-ASB).

Information on how to install the FLEX I/O PROFIBUS Adapter

(Catalog No. 1794-APB).

FLEX I/O PROFIBUS Adapter Module User Manual, publication publication publication

1794-UM057

1794-IN093

1794-6.5.2

x xxxxxxxxxxxxx

Flex I/O Digital Input Modules Installation Instructions,

x xxxxxxxxxxxxx

Flex I/O Digital DC Sourcing Input and Sinking Output

Modules Installation Instructions, publication 1794-IN095 x xxxxxxxxxxxxx

Flex I/O Digital DC Sourcing Output Modules Installation

Instructions, publication 1794-IN094 x xxxxxxxxxxxxx

Flex I/O Input/ Output Module Installation Instructions, publication 1794-IN083 x xxxxxxxxxxxxx

Flex I/O 8 Output Relay Module Installation Instructions, publication 1794-IN019 x xxxxxxxxxxxxx

FLEX I/O Input, Output and Input/Output Analog Modules

Installation Instructions, publication 1794-IN100 xxxxxxx

FLEX I/O Analog Module User Manual,

x xxxxxxxxxxxxx

FLEX I/O Isolated Analog Output Module Installation

Instructions, publication 1794-IN037 x xxxxxxxxxxxxx

Information on how to use the FLEX I/O PROFIBUS Adapter Module

(Catalog No. 1794-APB).

Information on how to install the Flex I/O Digital Input Modules

(Catalog No. 1794-IB8, 1794-IB16, 1794-IB16K, 1794-IB32).

Information on how to install the Flex I/O Digital DC Sourcing Input and

Sinking Output Modules (Catalog No. 1794-IV16, 1794-OV16, 1794-OV16P).

Information on how to install the Flex I/O Digital DC Sourcing Output Modules

(Catalog No. 1794-OB8, 1794-OB8EP, 1794-OB16, 1794-OB16P, 1794-OB32P).

Information on how to install the Flex I/O Input/ Output Modules

(Catalog No. 1794-IB16XOB16P, 1794-IB10XOB6).

Information on how to install the Flex I/O 8 Output Relay Modules

(Catalog No. 1794-OW8, 1794-OW8K, 1794-OW8XT).

Information on how to install the FLEX I/O Input, Output and Input/Output

Analog Modules (Catalog No. 1794-IE8, 1794-IE4XOE2, 1794-OE4, 1794-IE8K,

1794-OE4K).

Information on how to install the FLEX I/O Analog Modules

(Catalog No. 794-OE4, 1794-IE8, 1794-IE12, 1794-OE12, 1794-IE4XOE2,

1794-IE8XOE4, 1794-IE4XOE2XT, 1794-IE8XT, 1794-OE4XT).

Information on how to install the FLEX I/O Isolated Analog Output Module

(Catalog No. 1794-OF4I).

Publication 1794-6.5.11 - September 2011

Preface xi

Resource

FLEX I/O 4 Isolated Input Module Installation Instructions, publication 1794-IN038 x xxxxxxxxxxxxx

Information on how to install the FLEX I/O 4 Isolated Input Module

(Catalog No. 1794-IF4I).

FLEX I/O 2 In/2 Out Isolated Analog Combo Module

Installation Instructions, publication xxxxxxxxxxxxx

1794-IN039

FLEX I/O Isolated Analog Modules User Manual, publication 1794-6.5.8

x xxxxxxxxxxxxx

x

Description

Information on how to install the FLEX I/O 2 In/2 Out Isolated Analog Combo

Module (Catalog No. 1794-IF2XOF2I).

Information on how to use the FLEX I/O Isolated Analog Modules

(Catalog No. 1794-IF4I, 1794-OF4I, 1794-IF2XOF2I, 1794-IF4IXT, 1794-IF4ICFXT,

1794-OF4IXT, 1794-IF2XOF2IXT).

FLEX I/O 8 Thermocouple Input Module Installation

Instructions, publication 1794-IN021 x xxxxxxxxxxxxx

FLEX I/O 8 Input RTD Module User Manual, publication 1794-6.5.4

x xxxxxxxxxxxxx

FLEX I/O Thermocouple/Millivolt Input Module User

Manual, publication 1794-6.5.7

x xxxxxxxxxxxxx

FLEX I/O Thermocouple/RTD Input Analog Module

Instructions, publication 1794-IN050 x xxxxxxxxxxxxx

2-Input Frequency Module Installation Instructions, publication 1794-IN049 x xxxxxxxxxxxxx

Information on how to install the FLEX I/O 8 Thermocouple Input Modules

(Catalog No. 1794-IT8, 1794-IR8).

Information on how to use the FLEX I/O 8 Input RTD Module

(Catalog No. 1794-IR8).

Information on how to use the Thermocouple and Millivolt Input Module

(Catalog No. 1794-IT8).

Information on how to install the Thermocouple/Millivolt Input Modules

(Catalog No. 1794-IRT8, 1794-IRT8K, 1794-IRT8XT).

Information on how to install the 2-Input Frequency Module

(Catalog No. 1794-IJ2, 1794-IJ2K, 1794-IJ2XT).

FLEX I/O Thermocouple, RTD, mV Input Modul, publication

1794-6.5.12

x xxxxxxxxxxxxx

24V FLEX I/O 2 Channel Incremental Encoder Module

Installation Instructions, publication xxxxxxxxxxxxx

1794-IN063 x

Information on how to use the FLEX I/O Thermocouple, RTD, mV Input Module

(Catalog No. 1794-IRT8, 1794-IRT8K, and 1794-IRT8XT).

Information on how to install the 24V FLEX I/O 2 Channel Incremental Encoder

Module (Catalog No. 1794-ID2).

FLEX Integra Analog Module User Manual, publication 1793-6.5.1

x xxxxxxxxxxxxx

FLEX I/O 4 Channel Pulse Counter Module Installation

Instructions, publication 1794-IN064 x xxxxxxxxxxxxx

FLEX I/O Very High Speed Counter Module Installation

Instruction, publication 1794-IN067 x xxxxxxxxxxxxx

Information on how to install the FLEX Integra Analog Module (Catalog No.

1793-IE2X0E1,1793-IE2XOE1S, 1793-IE4, 1793-IE4S, 1793-OE2, 1793-OE2S).

Information on how to install the 24V DC FLEX I/O 4-Channel Module

(Catalog No. 1794-IP4).

Information on how to install the Very High Speed Counter Module

(Catalog No. 1794-VHSC).

FLEX I/O 48V DC Input and Output Modules Installation

Instructions, publication 1794-IN105 x xxxxxxxxxxxxx

FLEX I/O AC Digital Input Modules Installation

Instructions, publication 1794-IN102 x xxxxxxxxxxxxx

FLEX I/O Digital AC Output Modules Installation

Instructions, publication 1794-IN103 x xxxxxxxxxxxxx

FLEX I/O 220V AC Input and Output Modules Installation

Instructions, publication 1794-IN104 x xxxxxxxxxxxxx

FLEX I/O Terminal Base Units Installation Instructions, publication 1794-IN092 x xxxxxxxxxxxxx

Interconnect Cable Installation Instructions, publication 1794-5.12

x xxxxxxxxxxxxx

Information on how to install the FLEX I/O 48V DC Input and Output Modules

(Catalog No. 1794-IC16, 1794-OC16).

Information on how to install the FLEX I/O AC Input Modules

(Catalog No. 1794-IA8, 1794-IA8I, 1794-IA16).

Information on how to install the FLEX I/O Digital AC Output Modules

(Catalog No. 1794-OA8, 1794-OA8K, 1794-OA8I, 1794-OA16).

Information on how to install the FLEX I/O 220V AC Input and Output Modules

(Catalog No. 1794-IM8, 1794-OM8).

Information on how to install the FLEX I/O Terminal Base Units

(Catalog No. 1794-TB2, 1794-TB3, 1794-TB3K, 1794-TB3S, 1794-TB32,

1794-TB3G, 1794-TB3GK, 1794-TB3GS, 1794-TB3T, 1794-TB3TS, 1794-TBN,

1794-TBNK, 1794-TBNF).

Information on how to install the Interconnect Cable

(Catalog No. 1794-CE1, 1794-CE3).

Publication 1794-6.5.11 - September 2011

xii Preface

Resource

FLEX I/O DC Power Supply Installation Instructions, publication 1794-IN069 x xxxxxxxxxxxxx

Industrial Automation Wiring and Grounding Guidelines, publication 1770-4.1

x xxxxxxxxxxxxx

Rockwell Automation Industrial Automation Glossary,

AG-7.1

x xxxxxxxxxxxxx

Description

Information on how to install the FLEX I/O DC Power Supply

(Catalog No. 1794-PS13, 1794-PS3).

In-depth information on grounding and wiring Allen-Bradley programmable controllers.

A glossary of industrial automation terms and abbreviations.

Common Techniques Used in this Manual

The following conventions are used throughout this manual:

• Bulleted lists such as this one provide information, not procedural steps.

• Numbered lists provide sequential steps or hierarchical information.

• Italic type is used for emphasis.

Publication 1794-6.5.11 - September 2011

1

Overview

The FLEX System

Adapter

Chapter

1

Overview of the Frequency Input Module

This chapter provides a description of the application and capabilities of the

1794 FLEX I/O Frequency Input module. It also explains the general algorithm for calculating frequency.

Topic

The FLEX System

Type of Modules

Usage of the Frequency Input Module

The FLEX I/O Module in a Logix Control System

Typical Applications

Input Capabilities

Output Capabilities

How Frequency Is Calculated

Chapter Summary

7

8

12

5

6

2

3

Page

1

2

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

Terminal base I/O module

2

+

2

+

1794-IRT8

45568

• Adapter – transfers read and write configuration data to and from the

I/O module

• terminal base – contains a terminal strip to terminate wiring for two- or three-wire devices

Publication 1794-6.5.11 - September 2011

2 Overview of the Frequency Input Module

• I/O module – contains the bus interface and circuitry needed to perform specific functions related to your application

The 1794 FLEX system consists of an adapter module, terminal base unit,

DIN rail, power supply, and adapter cabling components. You can use up to 8 terminal bases per adapter module.

For detailed instructions to set up and install your module, refer to the topic,

Install Your FLEX I/O Frequency Input Module, on page 13.

Type of Modules

The FLEX I/O Frequency Input modules refer to the following catalogs.

Catalog No.

Voltage Inputs Outputs Description

1794-IJ2 24V DC 2 2 Digital – 2-pt 24V DC input frequency module

1794-IJ2K 24V DC 2 2

1794-IJ2XT 24V DC 2 2

Digital – 2-pt 24V DC input frequency module, conformally coated.

Digital – 2-pt 24V DC input frequency module for extended temperature.

The frequency input module is an intelligent I/O module designed to perform high-speed frequency algorithms. The module provides:

• 2 Frequency Inputs,

• 2 Gate Inputs and

• 2 Outputs.

The Frequency Inputs can accept frequencies up to 32,767 Hz and it accepts and returns binary data.

Usage of the Frequency

Input Module

The FLEX I/O Frequency Input module is essentially a tachometer with the capability of reporting frequency, acceleration, and direction. Outputs are activated by alarms. Input devices range from magnetic pickup to flowmeters, to incremental encoders to proximity detectors. This intelligent I/O module is designed to perform high-speed frequency algorithms.

Power to the module is supplied from an external power supply. All power for input devices (24V DC) is supplied by the I/O module. Outputs are used to set alarms depending on the input conditions.

The module measures frequency over a user-specified time interval. A frequency calculation can start before the time interval has elapsed, if a user-specified number of frequency input pulses have occurred.

Publication 1794-6.5.11 - September 2011

I n p u ts

Mod u le

FlexB u s

Overview of the Frequency Input Module 3

The primary use of the module is accurate, high-speed frequency measurement. A high-speed internal clock is synchronized with the frequency input to count over a user-selected sampling time or a user-defined number of frequency input pulses.

All power for input devices (4 devices, 24 V DC @ 15 mA max) is supplied by the I/O module.

Gate input Frequency input

500/50 mV

50 mV

Select

GND

IEC 1+/Contact

24Vpower

Input

Magnetic 24V IEC 1+

IEC 1+/Contact

Input 24V Power

GND

50 mV

Select

500/50 mV

Vortex

3Vin 6Vin 24V power

24V IEC 1+ Magnetic VORTEX

Invert

Y/N

Inter-processor communication, uP system 0/1

Invert

Y/N uP system 0

Input control

Processing

Counter

Direction data

Frequency / count data

Output control

CRISP

Bus interface

Output 0 Output 1

From uP system 1

Data To/From FlexBus

45388

The FLEX I/O Module in a

Logix Control System

The frequency input module performs high-speed frequency and/or scaling calculation operations for various industrial applications. The module interfaces with a FLEX I/O family adapter which then communicates with a programmable controller processor that has block-transfer capability and external I/O devices.

The adapter transfers data to the module (block transfer write) and from the module (block transfer read) using BTW and BTR instructions in your ladder diagram program. These instructions let the adapter read input values and status from the module, and let you write output values and configure the module mode of operation. The following illustration describes the communication process.

Publication 1794-6.5.11 - September 2011

4 Overview of the Frequency Input Module

Typical Communication between a FLEX I/O Module and an Adapter

1794-ACN15

1794-ACNR15

1794-ACNR15K

1794-ADN

1794-AENT

1794-APBDPV1

1794-ASB

1794-APB

Adapter

1794-AENT shown

1

The adapter transfers your configuration data to the module using a BTW.

FlexBus

FREQUENCY INPUT 2 CHANNEL

4

Your ladder program instructs the adapter to perform a BTR of the values and stores them in a data table.

0

FREQ

F 0

GATE

F 1

FREQ

F 1

GATE

F

OUT

0

1794-IJ2

OUT

1

OK

1

2

External devices transmit frequency signals to the module.

5

The adapter module determines that the transfer was made without error and input values are within specified range.

6

Your ladder program can use and/or transmit the data (if valid) before it is overwritten by the transfer of new data in a subsequent transfer.

7

Your ladder program performs BTWs to the module when you power it up, and any time you wish to reconfigure the module.

3

The module converts frequency signals into integer format and stores these values until the adapter requests their transfer.

45339

Publication 1794-6.5.11 - September 2011

Typical Applications

Overview of the Frequency Input Module 5

A broader view of how the FLEX I/O module interfaces with the different elements in a Logix system is shown in the sample illustration below.

PC running controller and

Rockwell Automation configuration software

Panel V iew S tation

FLEX System

1794 Adapter

1794 FLEX I/O module

Bridge

Ethernet

45567

.

In this example, the FLEX I/O module communicates with the controller through the adapter. The controller can produce and consume tags. It can initiate MSG instructions that send and receive data or configure devices.

Configuration of devices and the network is done through the personal computer running the controller and configuration software.

To learn about the steps to configure your FLEX I/O module, see Configure

Your FLEX I/O Module with RSLogix 5000 Software on page 29.

ATTENTION

The following publications provide more information about

EtherNet/IP, and ControlNet modules in a Logix5000 system:

•EtherNet/IP Modules in Logix5000 Control Systems, publication ENET-UM001

•ControlNet Modules in Logix5000 Control Systems, publication CNET-UM001

You can use the frequency input modules in power management, automotive, food and beverage, and oil and gas industries for various flow and/or turbine metering applications. Some sample applications include:

• turbine shaft speed monitoring

• automotive paint booths

• brewery flow monitoring

• petrochemical flow and custody transfer

Publication 1794-6.5.11 - September 2011

6 Overview of the Frequency Input Module

Input Capabilities

The frequency module has 2 input channels (mode dependent). Each of the 2 input channels may accept these input signals:

• magnetic pickup – 500 mV…28V AC peak (optional 50 mV…28V AC peak for increased signal sensitivity)

• proximity probe inputs

– compatible with Bently Nevada 3300 – 5 mm (0.197 in.) and 8 mm

(0.315 in.) – proximity transducer systems

– provides 1 isolated 24V DC power supply (2 channels rated at 30 mA each) to power external devices

– vortex flowmeter – 6V and 3V

You configure the 2 input channels for your specific application(s). Each input channel has two input selections:

F r eq u e n cy I n p u t (F0-F1) – you connect your input device to this input (ac, proximity sensors switch, magnetic, vortex )

Gate I n p u t (G0-G1) – you connect your input device to this input (ac, proximity sensors switch, magnetic, vortex )

used to determine direction – CW or CCW

0

FREQ

F

Allen-Bradley

FREQUENCY INPUT 2 CHANNEL

0

GATE

F 1

FREQ

F 1

GATE

F

OUT

0

1794-IJ2

1

OUT

1

OK

2 input channels

Frequency Input (F0)

Gate Input (G0)

Channel 0

Frequency Input (F1)

Gate Input (G1)

Channel 1

45557

Publication 1794-6.5.11 - September 2011

Overview of the Frequency Input Module 7

Selecting the Modes of Operation

You configure the frequency input module for these modes of operation:

Modes of Operation

Mode Use this mode to

Frequency and

% Full Scale

•Monitor the frequency of an input with high accuracy (for example, shaft)

•Monitor the percentage of full scale frequency

•Operate frequency alarm (% full scale)

•Scale the frequency

•Monitor the direction of shaft rotation

•Wire-off alarm with DC devices

•Missing pulse alarm

Frequency and Acceleration •Monitor the frequency of an input with high accuracy (for example, shaft)

•Monitor the acceleration (rate of speed change)

•Operate acceleration alarm (rate of change)

•Scale the frequency

•Monitor the direction of shaft rotation

•Wire-off alarm with DC devices

•Missing pulse alarm

Indicators /

Alarms

Scaler /

Values x x x x x x x x

Output Capabilities

The frequency input module has 2 assignable outputs. These outputs are designed for applications that require fast response. The outputs:

• are current sourcing at 10…31.2V DC (1 A maximum per output)

• are electrically fused (current limited to 3 A)

• can be assigned to the associated input channel with user-selectable frequency and acceleration values

• are isolated – this lets you use two separate external power supplies if desired (one for output 0 and one for output 1)

Implementing Application Features

You can use the module to implement programmable application features that are usually initiated by your controller processor. This frees up the controller

Publication 1794-6.5.11 - September 2011

8 Overview of the Frequency Input Module processor to do other tasks and helps increase the overall throughput of your controller system.

Application Features

Feature

Frequency alarm

Acceleration alarm

Scaling

Mode

Frequency alarm selected

Acceleration alarm selected

% full scale and acceleration

Purpose

Activate alarm when calculated or scaled frequency is higher than user-specified frequency value.

Activate acceleration alarm when acceleration is greater than user-specified acceleration value.

Multiply and/or divide frequency by scalar

Alarm is ON when

Frequency > user-specified value

| Acceleration | > user-specified value

Frequency > User-specified scaled frequency value

How Frequency Is

Calculated

The following paragraphs explain the operation of the frequency input module algorithm and its modifying parameters.

Frequency Calculation

Frequency is determined by a general algorithm which can be modified by user-defined parameters. In its simplest form, the algorithm employs the user-defined Minimum Sampling Time to set a window in which to count pulses to determine the frequency. At least two pulses are required within the sample window. Frequency is determined by storing the time the first pulse occurred and then continually storing and updating the time of subsequent pulses, along with the number of pulses encountered. When the window expires, the frequency is calculated and the procedure repeats. The sequence and formula for determining frequency are shown below.

Publication 1794-6.5.11 - September 2011

Overview of the Frequency Input Module 9

Normal Mode Frequency Determination, at Least Two Pulses in Sampling Time

Missing pulse alarm would be reported after 2 s, if no pulse occurs

Frequency reported at end sampling time

=

Pulses counted

T2 - T1

Minimum sampling time

Frequency input pulses pulses counted

First pulse in window,

T1 time stored

T2, update as each pulse occurs

Last pulse in window

45340

If only one pulse occurs within the sampling window, when the sample time has expired, the window is extended to 2 s to allow for a second pulse to occur.

As soon as a second pulse occurs, the frequency is calculated and the procedures starts over. If no second pulse is detected, zero frequency is reported and a Missing Pulse Alarm is generated. The following figure depicts this scenario.

Normal Mode, Only One Pulse in Sampling Time,

Sampling Time Extended

Frequency reported at first pulse in extended Time

=

Missing pulse alarm is reported after 2 s, if no pulse occurs

2 - 1

T2 - T1

Minimum sampling time Frequency input pulses

2 = pulses counted Sampling time extended to 2 s

First pulse in window,

T1 time stored

First pulse after window extended,

T2 time stored

45341

Publication 1794-6.5.11 - September 2011

10 Overview of the Frequency Input Module

Termination on Number of Pulses

The normal mode is designed to provide wide bandwidth. However, it requires the full 2 seconds to report a missing pulse. Another user parameter, Number of Pulses to Terminate Sampling, is provided for scenarios where many pulses are expected within the sampling window, such that early determination of frequency is possible.

During normal operation, there is a sufficient number of pulses to prevent the module from entering the 2-second extension mode. Once the user-defined number of pulses is reached within the sampling window, the frequency is immediately reported.

If the sampling window has been extended to 2 seconds while waiting for a second pulse to occur, a situation which can occur during system startup, the module does not wait for the number of pulses to be reached. Instead, as soon as a second pulse occurs, the frequency is calculated based on the time between the 2 pulses, and the procedure starts over.

Termination on Number of Pulses

Frequency reported at number of pulses to terminate reached

=

Pulses to terminate - 1

T2 - T1

Missing pulse alarm would be reported after 2 seconds, if no pulse occurs

Minimum sampling time pulses to terminate

Frequency input pulses

45342

First pulse in window,

T1 time stored

T2, update as each pulse occurs

Number of pulses to terminate reached

Missing Pulse Multiplier

The last user parameter which is provided to modify the frequency algorithm is the Missing Pulse Multiplier. In this case, the user can set the number of

Minimum Frequency Sampling Time windows allowed to extend the time to capture a second pulse, before reporting a Missing Pulse Alarm. The intent with this parameter is to allow a tradeoff of the bandwidth available with the response time to report a missing pulse. This mechanism is shown in the following figure.

Publication 1794-6.5.11 - September 2011

Overview of the Frequency Input Module 11

Missing pulse multiplier

Frequency reported at first pulse in extended time

=

2 - 1

T2 - T1

Missing pulse alarm would be reported after last window, if no pulse occurs

Extended windows added one at time, until pulse occurs or multiplied windows exceeded

Minimum sampling time

2 = pulses counted

Possible extended window

Frequency input pulses

First pulse in window,

T1 time stored

First pulse in an extended window, T2 time stored

45343

Direction Detection

Direction detection is accomplished by using the Frequency input, Gate input, and two sensors. The module expects to see a Low to High transition on the

Frequency input, followed by a Low to High transition on the Gate input. This assumes both input polarity select bits are the same selection.

This corresponds to clockwise rotation. See illustration, Direction Detection –

Principle of Operation, on page 12. If a Low to High transition occurs on the

Gate input, followed by one on the Frequency input, the rotation is counterclockwise.

Publication 1794-6.5.11 - September 2011

12 Overview of the Frequency Input Module

M

2 x M

Direction Detection – Principle of Operation

Clockwise rotation

Sensor 0

Sensor 1

Gate input

IJ2 module

Frequency input

Sensor 0 (F)

Sensor 1 (G)

Clockwise

Rotation

Sensor 0 (F)

Sensor 1 (G)

Counter

Clockwise

Rotation

Chapter Summary

45344

In this chapter, you learned about the frequency input module, block transfer communication, and details of how the module functions.

Publication 1794-6.5.11 - September 2011

Chapter

2

Install Your FLEX I/O Frequency Input Module

Overview

Before You Install

Your Module

This chapter provides you with pre-installation requirements and instructions on how to install your FLEX I/O Frequency Input modules.

Topic

Before You Install Your Module

Power Requirements

Install the Module

Mount on a DIN Rail

Mount on a Panel or Wall

Mount the Frequency Input Module on the Terminal Base Unit

Wiring Information

Connect Wiring to the FLEX I/O Frequency Input Module

Connecting Wiring Using a 1794-TB3G, 1794-TB3GK or 1794-TB3GS

Terminal Base Unit

Resolution and Accuracy

Examples of Wiring to a 1794-TB3G Terminal Base Unit

Chapter Summary

24

27

27

18

20

21

22

14

14

16

Page

13

13

Before installing your frequency input module in the FLEX I/O system, you need to:

• calculate the power requirements of all modules in each FLEX I/O system, and

• position the keyswitch on the terminal base.

ATTENTION

This FLEX I/O module does not receive primary operational power from the backplane. 24V DC power must be applied to your module before installation. If power is not applied, the module position may appear to the adapter as an empty slot in your chassis.

Power Requirements

13

The wiring of the terminal base unit is determined by the current draw through the terminal base. Make certain that the current draw does not exceed 10 A.

Publication 1794-6.5.11 - September 2011

14 Install Your FLEX I/O Frequency Input Module

ATTENTION

Total current draw through the terminal base unit is limited to 10 A.

Separate power connections may be necessary.

The frequency input module requires 30 mA at 5V DC from the FlexBus backplane.

Methods of wiring the terminal base units are shown in the illustration below.

ATTENTION

Do not daisychain power or ground from the terminal base unit to any

AC or DC digital module terminal base unit.

Install the Module

Installation of the frequency input module consists of:

• mounting the terminal base unit

• installing the module into the terminal base unit

• installing the connecting wiring to the terminal base unit

Mount on a DIN Rail

ATTENTION

Do not remove or replace a terminal base unit when power is applied.

Interruption of the FlexBus can result in unintended operation or machine motion.

Install the Terminal Base Unit

1.

Remove the cover plug in the male connector of the unit to which you are connecting this terminal base unit.

Publication 1794-6.5.11 - September 2011

Install Your FLEX I/O Frequency Input Module 15

2.

Check to make sure that the 16 pins in the male connector on the adjacent device are straight and in line so that the mating female connector on this terminal base unit will mate correctly.

7

8

9

6

0

4

1

2

3

7

2

+

2

+

45319

Make certain that the female FlexBus connector is fully retracted into the base unit.

3.

Position the terminal base at a slight angle and hooked over the top of the 35 x 7.5 mm DIN rail A (Allen Bradley part number 199-DR1;

46277-3).

2

+

2

+

45320

4.

Slide the terminal base over tight against the adapter, or proceeding terminal base. Make sure the hook on the terminal base slides under the edge of the adapter, or proceeding terminal base, and the FlexBus connector is fully retracted.

5.

Rotate the terminal base onto the DIN rail with the top of the rail hooked under the lip on the rear of the terminal base.

Use caution to make sure that the female FlexBus connector does not strike any of the pins in the mating male connector.

Publication 1794-6.5.11 - September 2011

16 Install Your FLEX I/O Frequency Input Module

6.

Press down on the terminal base unit to lock the terminal base on the

DIN rail. If the terminal base does not lock into place, use a screwdriver or similar device to open the locking tab, press down on the terminal base until flush with the DIN rail and release the locking tab to lock the base in place.

2 2

+ +

45321

Gently push the FlexBus connector into the side of the adapter, or proceeding terminal base to complete the backplane connection.

Publication 1794-6.5.11 - September 2011

2

+

2

+

45322

For specific wiring information, refer to the installation instructions for the module you are installing in this terminal base unit.

7.

Repeat the above steps to install the next terminal base unit.

Ensure that the cover of the FlexBus connector on the last terminal base unit is in place.

Mount on a Panel or Wall

Installation of a FLEX I/O system on a wall or panel consists of:

• laying out the drilling points on the wall or panel.

• drilling the pilot holes for the mounting screws.

• mounting the adapter mounting plate.

Install Your FLEX I/O Frequency Input Module 17

• installing the terminal base units and securing them to the wall or panel.

Use the mounting kit Cat. No. 1794-NM1 for panel or wall mounting.

1794-NM1 Mounting Kit

Millimeters

(inches)

1

35.5

(1.4)

Millimeters

(Inches)

4

2

9

7

8

6

0

1

4

2

3

7

2

+

2

+

3

45323

1

2

Description

Mounting plate for adapter

#6 Self-tapping screws

3

4

To install the mounting plate on a wall or panel:

1.

Lay out the required points on the wall or panel as shown in the drilling dimension drawing.

Drilling Dimensions for Panel or Wall Mounting

Description

Terminal base unit (not included)

Adapter module (not included)

35.5

(1.4)

58.5

(2.3)

35.5

(1.4)

58.5

(2.3)

35.5

(1.4)

21 (0.83)

45327

Publication 1794-6.5.11 - September 2011

18 Install Your FLEX I/O Frequency Input Module

2.

Drill the necessary holes for the #6 self-tapping mounting screws.

3.

Mount the mounting plate for the adapter module using two #6 self-tapping screws – 18 screws are included for mounting up to 8 modules and the adapter.

IMPORTANT

Make certain that the mounting plate is properly grounded to the panel. Refer to Industrial Automation Wiring and Grounding

Guidelines, publication 1770-4.1

.

4.

Hold the adapter at a slight angle and engage the top of the mounting plate in the indention on the rear of the adapter module.

5.

Press the adapter down flush with the panel until the locking lever locks.

6.

Position the terminal base unit up against the adapter and push the female bus connector into the adapter.

7.

Secure to the wall with two #6 self-tapping screws.

8.

Repeat for each remaining terminal base unit.

Mount the Frequency Input Module on the Terminal Base Unit

The Frequency Input module mounts on a 1794-TB3G or 1794-TB3GS terminal base unit.

1.

Rotate keyswitch (3) on terminal base unit (4) clockwise to position 1 as required for the module.

Do not change the position of the keyswitch after wiring the terminal base unit.

Publication 1794-6.5.11 - September 2011

1

Install Your FLEX I/O Frequency Input Module 19

2

3

4

5

6

8

7

40231

Label here or under here

Description

1 FlexBus connector

2 Latching mechanism

3 Keyswitch

4 Cap plug

Description

5 Base unit

6 Alignment groove

7 Alignment bar

8 Module

2.

Make certain the FlexBus connector (1) is pushed all the way to the left to connect with the neighboring terminal base or adapter.

You cannot install the module unless the connector is fully extended.

3.

Make sure the pins on the bottom of the module are straight so they will align properly with the connector in the terminal base unit.

ATTENTION

If you remove or insert the module while the backplane power is on, 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.

4.

Position the module (8) with its alignment bar (7) aligned with the groove (6) on the terminal base.

5.

Press firmly and evenly to seat the module in the terminal base unit.

The module is seated when the latching mechanism is locked into the module.

6.

Remove cap plug and attach another terminal base unit to the right of this terminal base unit if required.

Make sure the last terminal base has the cap plug in place.

Publication 1794-6.5.11 - September 2011

20 Install Your FLEX I/O Frequency Input Module

IMPORTANT

The adapter is capable of addressing eight modules. Do not exceed a maximum of eight terminal base units in your system.

Wiring Information

This section provides essential wiring information for the 1794-TB3G,

1794-TB3GK, and 1794-TB3GS terminal base units. It also includes instructions for connecting wiring to the FLEX I/O module.

Wiring the Terminal Base Units (1794-TB3G shown)

Daisy-chai n i n g

Frequency input module

Frequency input module

Analog module

Frequency input module

I n divid u al

24V DC

Wiring when total current draw is 10 A.

Digital input module

Frequency input module

Digital input module

Digital output module

24V DC

24V DC

24V DC

Combi n atio n

Wiring when total current draw is greater than 10 A.

Analog

module

Frequency input module

Frequency Input module

Frequency input module

24V DC

24V DC

Total current draw through any base must not be greater than 10 A.

Publication 1794-6.5.11 - September 2011

45556

Install Your FLEX I/O Frequency Input Module 21

ATTENTION

Take note of the following considerations when wiring your terminal base units:

•AIl modules must be frequency or analog modules for the daisychain configuration.

•Use the individual type of configuration for any "noisy" DC digital I/O modules in your system.

•All modules powered by the same power supply must be frequency or analog modules for the combination type of configuration.

Wire the Terminal Base Units

Wiring the FLEX I/O Frequency Input module is done using the 1794-TB3G,

1794-TB3GK or the 1794-TB3GS terminal base unit.

1794-TB3G, 1794-TB3GK and 1794-TB3GS Wiring Connections

1794-TB 3 GS

1794-TB 3 G o r 1794-TB 3 GK

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

0

16

34

1 2 3

17

4 5 6 7

18 19 20 21 22 23

35 36 37 38

8 9 10 11 12 13 14 15

24 25 26 27 28 29 30 31 32

39 40 41 42 43 44 45 46 47 48 49 50

33

51

Label placed at top of wiring area

A 0...15

A

16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33

B 16...33

B

34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51

C 34...51 C

34 and 50 = 24V DC

35 and 51 = common

16 and 33 = chassis

40…45 = chassis ground

35 and 51 = common

34 and 50 = 24V DC

16 and 33 = chassis ground

40…45 = chassis ground

45328

Connect Wiring to the FLEX I/O Frequency Input Module

Wiring to the Frequency Input module is made through the terminal base unit on which the module mounts.

The module is compatible with the 1794-TB3G, 1794-TB3GK and

1794-TB3GS terminal base units.

Publication 1794-6.5.11 - September 2011

22 Install Your FLEX I/O Frequency Input Module

Connecting Wiring Using a 1794-TB3G, 1794-TB3GK or

1794-TB3GS Terminal Base Unit

1.

Connect individual signal wiring to numbered terminals on the 0…15 row (A) and 17…32 row (B) on the terminal base unit as indicated in the table below.

2.

Connect output signal and supply wiring to the numbered terminals on

rows B and C, as shown in the figure, 1794-TB3G, 1794-TB3GK and

1794-TB3GS Wiring Connections, on page 21.

3.

Terminate shields to terminals 16 or 33 on row B, or 40…45 on row C.

4.

Connect +24V DC to terminal 34 on the 34…51 row (C), and 24V common to terminal 35 on the 34…51 row (C).

ATTENTION

To reduce susceptibility to noise, power frequency modules and digital modules from separate power supplies. Do not exceed a length of

10 m (33 ft) for DC power cabling.

5.

If daisychaining the +24V DC power to the next 1794-TB3G or

1794-TB3GS base unit, connect a jumper from terminal 50 (+24V) on this base unit to terminal 34 and from terminal 51 (24V DC common) to terminal 35 on the next 1794-TB3G or 1794-TB3GS base unit.

ATTENTION

Use extreme care when connecting wiring to an adjacent terminal base unit. Wiring for the 1794-TB3G and 1794-TB3GS terminal base units is different from other 1794 terminal base units.

ATTENTION

Do not daisychain power or ground from the 1794-TB3G or

1794-TB3GS terminal base unit to any AC or DC digital module terminal base unit.

ATTENTION

24V DC power must be applied to your module before operation. If power is not applied, the module position will appear to the adapter as an empty slot in your chassis. If the adapter does not recognize your module after installation is completed, cycle power to the adapter.

Publication 1794-6.5.11 - September 2011

Install Your FLEX I/O Frequency Input Module 23

Wiring Connections for the Frequency Input Module

Types of Inputs

Frequency

24V DC IEC1+ Proximity

(1) (2)

24V DC Contact Switch

(3)

500mV AC Magnetic Pickup

Channel 0 Terminals

(5)

Power Input RET

7

7

6

6

3

3

(7)

Channel 1 Terminals

(5)

Power Input

8

8

9

9

50mV AC Magnetic Pickup

(4)

6V AC Vortex

3V AC Vortex

Gate

24V DC IEC1+ Proximity

(1) (2)

24V DC Contact Switch

(3)

500mV AC Magnetic Pickup

50mV AC Magnetic Pickup

(4)

7

(6)

7

2

2

24

24

24

24

5

5

1

0

23

23

22

22

3

3

3

3

20

20

20

20

8

8

13

13

25

25

25

25

10

10

14

15

26

26

27

27

(1)

As defined by standard IEC 1131-2.

(2)

RET not used on 2-wire devices.

(3)

Add external resistor from 24V to F or G for wire-off detection (0.4 mA) – (

≈

50 K

Ω

).

(4)

Add a jumper between 50 mV and RET (Frequency – channel 0 = 3…4; channel 1 = 11…12)

(Gate – channel 0 = 21…20; channel 1 = 28…29).

(5)

Connect cable shields to GND terminals.

(6)

24V terminal may not be used on 2-wire magnetic devices.

(7)

All 4 RET terminals (ch 0 and 1, Freq, Gate) are internally connected together.

RET

12

12

12

12

12

12

29

29

29

29

(7)

GND

(5)

ATTENTION

Total current draw through the terminal base unit is limited to 10 A.

Separate power connections to the terminal base unit may be necessary.

Publication 1794-6.5.11 - September 2011

24 Install Your FLEX I/O Frequency Input Module

0 1 2

Co nn ectio n s fo r Te r mi n al Base 1794-TB 3 G show n

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

3V 6V 24V

Pwr

RET 50 mV

Sel

500/50 mV

Channel 0 Frequency Input

F 24V

Pwr

24V

Pwr

F 500/50 mV

50 mV

Sel

RET 24V

Pwr

6V

Channel 1 Frequency Input

3V

16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33

Out 0 Out 0

Ret

Chassis Gnd

RET 50 mV

Sel

500/50 mV

Channel 0 Gate Input

G 24V

Pwr

24V

Pwr

G 500/50 mV

50 mV

Sel

Channel 1 Gate Input

RET Out 1 Out 1

Ret

Chassis Gnd

34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51

+V COM

24V DC

Supply In

Sply 0

Gnd

Sply 0

Ret

Channel 0 Output Supply

6 Chassis Ground for Shields

+24V DC = Terminals C-34 and C-50

COM = C-35 and C-51

Chassis Ground = Terminals B-16, B-33, C-38, C-40…45, and C-47

NC = No connection

Sply 1

Gnd

Sply 1

Ret

+V COM

Channel 1 Output Supply

24V DC

Supply Out

45346

For daisychaining:

Supply in – C-34 (+) and C-35 (-)

Supply out – C-50 (+) and C-51 (-)

Output Alarm Connections

Output Alarm

Connections

Channel 0 Terminals

(1)

Supply

+

C-37

Supply

RET

C-39

Out + Out

RET

Supply

Output

(1)

Connect cable shields to GND connections.

B-17 B-18

Channel 1 Terminals

(1)

Supply

+

C-46

Supply

RET

C-48

Out + Out

RET

B-31 B-32

Resolution and Accuracy

1 Hz or 0.1 Hz (depending on frequency range bit setting), or + accuracy specification listed below, whichever is greater.

Publication 1794-6.5.11 - September 2011

Install Your FLEX I/O Frequency Input Module 25

Resolution % is defined as:

% Resolution =

100

Count frequency x minimum frequency sample time

Accuracy % is defined as:

% Accuracy = 100 1 -

Minimum frequency sample time

2

Minimum frequency sample

+ time

1 count frequency

2

4

5

10

20

50

100

200

500

1000

Resolution and Accuracy

Accuracy

Minimum

Frequency

Sample

Time (ms)

Sampling

Accuracy

Time

Base

Accuracy

0.02%

0.01%

0.008%

0.004%

0.002%

0.0002%

0.00008%

0.00004%

0.0225%

0.0225%

0.0225%

0.0225%

0.0225%

0.0008% 0.0225%

0.0004% 0.0225%

0.0225%

0.0225%

0.0225%

0.0425

0.0325

0.0305

0.0265

0.0245

0.0233

0.0229

0.0227

0.02258

0.02254

Worst

Case

Total

Accuracy

Deviation in Hz Due to

Total Accuracy

1.0…3276.7

Frequency

Range

(in Hz)

0.1…1.4

1…32767

Frequency

Range

(in Hz)

1…14

Resolution

0.01%

0.1…1.1

0.1…1.0

0.1…0.9

0.1…0.8

1…11

1…10

1…9

1…8

0.005%

0.004%

0.002%

0.001%

0.1…0.8

0.1…0.8

0.1…0.7

0.1…0.7

0.1…0.7

1…8

1…8

1…7

1…7

1…7

0.0004%

0.0002%

0.0001%

0.00004%

0.00002%

Input Map

2

3

4

0

1

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

Word Read

Frequency 0…32,767 or 0.0…3,276.7 Channel 0

% Full Scale 0.0…3,276.7% Channel 0 or Acceleration -32,768…32,767 Channel 0

Frequency 0…32,767 or 0.0…3,276.7 Channel 1

% Full Scale 0.0…3,276.7% Channel 1 or Acceleration -32,768…32,767 Channel 1

R R Direction

Ch 0

GS

Ch 0

F/A

Ch 0

WO

Ch 0

MPA

Ch 0

R R Direction

Ch 1

GS

Ch 1

F/A

Ch 1

WO

Ch 1

MPA

Ch 1

Publication 1794-6.5.11 - September 2011

26 Install Your FLEX I/O Frequency Input Module

Output Map

Dec

Oct

0

1

2

15

17

CF

14

16

13

15

SSM FR

Ch0

12 11 10

14 13 12

Number of pulses to terminate sampling

0…7 Ch 0

Maximum Frequency 0…32.767 or 0.0…3,276.7 - or -

Absolute Value of Acceleration - 0…32767 Channel 0

Frequency Scaling Divisor 0…255 Channel 0

09 08

11 10

MPM 0…3

Ch 0

3

4

5

Input Map

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

Word Read

5 Reserved Diagnostic Status

Channel 0

Reserved Diagnostic Status

Channel 1

6

Where:

Reserved

R = Reserved

GS = Gate state

F/A = Frequency/Acceleration alarm

WO = Wire-off alarm

MPA = Missing pulse alarm

WOFG

Ch0

WOFF

Ch0

IGI

Ch0

IFI

Ch0

Minimum Frequency

Sample Time 0…15

Ch 0

Maximum Frequency 0…32,767 or 0.0…3,276.7 - or -

Absolute Value of Acceleration – 0…32,767 Channel 1

Frequency Scaling Divisor 0…255 Channel 1

07

07

R

06 05 04

06 05 04

LF FR

Ch 1

03

03

02

02

Number of pulses to terminate sampling

0…7 Ch 1

Frequency Scaling Multiplier 0…255

Channel 0

Init St

Up

Ch 0

ACT 0…3

Ch 0

F/AA

S Ch0

MPDM

0…3 Ch 0

01 00

01 00

MPM

0…3

Ch 1

WOFM

0…3 Ch0

6 WOFG

Ch1

WOFF

Ch1

IGI

Ch 1

IFI

Ch 1

Minimum Frequency

Sample Time 0…15 Ch 1

Frequency Scaling Multiplier 0…255

Channel 1

Init St

Up

Ch 1

ACT 0…3

Ch 1

F/AAS

Ch 1

MPDM

0…3 Ch 1

WOFM

0…3 Ch 1

7 Reserved

Where: CF = Communication fault

SSM = Safe state mode

FR = Frequency range

R = Reserved

MPM = Missing pulse multiplier

LF = Local Fault mode

F/AAS = Frequency/Accel alarm select

WOFF = Wire-off fault frequency

WOFG = Wire-off fault gate

WOFM = Wire-off fault mode

IGI = Invert gate input

IFI = Invert frequency input

ACT = Acceleration calculation time

MPDM = Missing pulse delay multiplier

Publication 1794-6.5.11 - September 2011

Chapter Summary

Install Your FLEX I/O Frequency Input Module 27

Examples of Wiring to a 1794-TB3G Terminal Base Unit

Sta n da r d Mag n etic Pick u p

500 mV threshold (F0)

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

Sta n da r d Mag n etic Pick u p

50 mV threshold (F0)

16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33

34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51

Impo r ta n t: When using a channel for 50 mV sensor, jumper the

50/500 mV pin to the appropriate

RET.

Magnetic

Input

Device -

+

5

3

40

10

12

41

-

+ Magnetic

Input

Device

24V DC IEC 1+ P r oximity

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

16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33

34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51

6V Vo r tex Flowmete r

Power

+

-

Input

Device

+

-

In

Sta n da r d O u tp u t (O0)

External

Power Supply #1

10-31.2V DC @ 1A

+

-

LOAD 0

+

-

6

3

42

3

7

42

14

12

13

12

45

+

-

6V Vortex

+

Flowmeter

-

17

18

16

37

39

38

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

16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33

34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51

24V DC Co n tact Switch

Add external resistor from 24V to F or G for wire-off detection.

Powe r

9

8

44

In

45347

This chapter provided you with instructions on how to install the input module in an existing programmable controller system and how to wire to a terminal base unit.

Publication 1794-6.5.11 - September 2011

28 Install Your FLEX I/O Frequency Input Module

Notes:

Publication 1794-6.5.11 - September 2011

29

Configure Your FLEX I/O Module with

RSLogix 5000 Software

Chapter

3

Overview

Add and Configure the

FLEX I/O Module

This chapter describes how to configure the 1794-IJ2 module for the

ControlLogix and CompactLogix system. The module can communicate through different networks such as ControlNet, Ethernet, Profibus, among others. In the examples below, the Ethernet adapter is used for communication between the Logix processor and the FLEX I/O bus.

ATTENTION

If using an SLC controller with ControlNet, refer to the associated I/O scanner documentation.

If using a PLC 5 controller, refer to the PLC 5 controller documentation for ControlNet configuration information.

You need to follow these series of steps to fully configure your FLEX I/O module in the RSLogix 5000 software.

1.

Add and configure the new local bridge module, such as 1756-ENBT, to your project. This user manual assumes you have already properly configured this module. Refer to the associated documentation.

2.

Add and configure the new adapter module, such as a FLEX I/O

EtherNet Adapter (1794-AENT). This user manual assumes you have already properly configured this module. Refer to the associated documentation.

3.

Add and configure your FLEX I/O module. See the steps provided below.

4.

Download the configuration to the controller.

To be able to add your FLEX I/O Frequency Input module, you should have already added and configured your Ethernet bridge and adapter.

Publication 1794-6.5.11 - September 2011

30 Configure Your FLEX I/O Module with RSLogix 5000 Software

1.

Select New Module for the I/O Configuration.

Right-click the local communication module.

Select New Module.

2.

The Select Module dialog appears.

Select the FLEX I/O module from the Specialty module type. Click OK

3.

The New Module dialog appears.

Publication 1794-6.5.11 - September 2011

Configure Your FLEX I/O Module with RSLogix 5000 Software 31

Complete the following fields and click OK.

• Name

• Description

• Comm Format

• Electronic Keying

4.

On the Connection tab, specify a value for the Requested Packet

Interval(RPI).

5.

On the Fault Action tab, specify the following:

• Fault Mode

• Communication Fault Behavior

Publication 1794-6.5.11 - September 2011

32 Configure Your FLEX I/O Module with RSLogix 5000 Software

6.

On the Configuration tab, specify the following:

• Channel

• Frequency or Acceleration

Publication 1794-6.5.11 - September 2011

If you choose Frequency, go to step 8. Go to step 9 if you choose

Acceleration.

7.

For Frequency mode, specify the following:

• Maximum Frequency

• Frequency Range

• Minimum Frequency Sample Time

8.

For Acceleration mode, specify the following:

• Maximum Frequency

• Frequency Range

• Minimum Frequency Sample Time

• Acceleration Calculation Time

9.

Click the Alarms tab and specify the following:

• Missing Pulse Multiplier

• Missing Pulse Delay Multiplier

• Pulses to Terminate Sampling

• Wire-off/Missing Pulse Fault Select Mode

10.

Click OK on the Module Properties dialog after you have configured the different parameters.

The following options are available for each parameter on the Configuration and Alarms tabs of the Module Properties dialog.

Configure Your FLEX I/O Module with RSLogix 5000 Software 33

Configuration Parameters

Module Property

Maximum Frequency

Frequency Range

Minimum Frequency Sample Time

Acceleration Calculation Time

Missing Pulse Multiplier

Pulses to Terminate Sampling

Wire-off/Missing Pulse Fault Select

Mode

Configuration Options

0 Hz (default)

1…32767

1.0…3276.7

2…100

Rolling Average

8

16

32

None

2

8

32

4

8

Minimum Frequency Sample Time

2

16

32

Disabled

Alarm Only

Alarm/Maximum Frequency

Alarm/Minimum Frequency

You should now see the 1794-IJ2 module added to your

I/O Configuration tree.

Chapter Summary

To be able to check if your configured parameters are acceptable and the configuration is successful, you need to go online.

Refer to the RSLogix 5000 Online Help for detailed descriptions of the configuration parameters.

This chapter provided instructions and required parameters for setting up your

FLEX I/O module on an EtherNet/IP network.

Publication 1794-6.5.11 - September 2011

34 Configure Your FLEX I/O Module with RSLogix 5000 Software

Notes:

Publication 1794-6.5.11 - September 2011

35

Chapter

4

Read and Write Configuration Maps for the

FLEX I/O Module

Overview

This chapter describes how to configure, read data from, and map data to your

Frequency Input module.

Topic

Configure Your Frequency Input Module

Read Data From Your Module

Map Data for the Module

Frequency Input Module Image Table Mapping

Chapter Summary

Page

35

35

36

36

49

Configure Your Frequency

Input Module

The frequency module is configured using a group of data table words that are transferred to the module using a block transfer write instruction.

The software features available for configuration are:

• frequency range

• number of pulses to sample

• sampling time

• safe states

• fault modes

• alarms

Configure your module for its intended operation by means of your programming terminal and write block transfers.

During normal operation, the processor transfers from 1…8 words to the module when you program a BTW instruction to the module address.

Read Data From Your

Module

Read programming transmits status and data from the frequency input module to the processor data table in one I/O scan. The processor user program initiates the request to transfer data from the frequency input module to the processor.

Publication 1794-6.5.11 - September 2011

36 Read and Write Configuration Maps for the FLEX I/O Module

Map Data for the Module

The following read and write words and bit/word descriptions describe the information written to and read from the frequency input module. The module uses up to 6 words of input data and up to 7 words of output data.

Each word is composed of 16 bits.

Frequency Input Module Image Table Mapping

I/O Image

I n p u t size

1...6 Words

O u tp u t size

0...7 Words

R

DIR

0

Mod u le Image

Frequency Channel 0

% Full Scale or Acceleration Channel 0

Frequency Channel 1

% Full Scale or Acceleration Channel 1

GS

0

F/A

0

WO

0

MPA

0

Reserved

R R

DIR

1

GS

1

F/A

1

WO

1

MPA

1

Diagnostics

CF SSM

FR

0

NOPTS

0

MPM

0

R LF

FR

1

NOPTS

1

Minimum Freq or Absolute Value of Acceleration Channel 0

MPM

1

Frequency Scaling Divisor Channel 0 Frequency Scaling Multiplier Channel 0

WOFG

0

WOFF

0

IGI

0

IFI

0

MFST

0

IS

UP0

ACT 0

F/A

AS0

MPDM

0

Minimum Freq or Absolute Value of Acceleration Channel 1

WOFM

0

WOFG

1

Frequency Scaling Divisor Channel 1

WOFF

1

IGI

1

IFI

1

MFST

1

IS

UP1

Frequency Scaling Multiplier Channel 1

ACT 1

F/A

AS1

MPDM

1

WOFM

1

45351

Block Transfer Read Word Assignments

2

3

0

1

(Octal Bit) 17 16 15

Decimal Bit 15 14 13

14

12

13

11

12

10

11

09

Frequency 0…32,767 or 0.0…3,276.7 Channel 0

10

08

07

07

06

06

05

05

04

04

% Full Scale 0.0%…3,276.7% Channel 0 or Acceleration -32,768…+32,767 Channel 0

Frequency 0…32,767 or 0.0…3,276.7 Channel 1

% Full Scale 0.0%…3,276.7% Channel 1 or Acceleration -32,768…+32,767 Channel 1

03

03

02

02

01

01

00

00

Publication 1794-6.5.11 - September 2011

Read and Write Configuration Maps for the FLEX I/O Module 37

Block Transfer Read Word Assignments

(Octal Bit) 17 16 15 14

Decimal Bit 15 14 13

4 R R

12

Direction

Ch 0

5 Reserved

Where:

13

R = Reserved

GS = Gate state

F/A = Frequency/Acceleration alarm

WO = Wire-off alarm

MPA = Missing pulse alarm

12 11

11 10 09

GS

Ch 0

F/A

Ch 0

WO

Ch 0

10

08

MPA

Ch 0

07

07

R

06

06

R

05

05

04

04

Direction

Ch 1

03

03

GS

Ch 1

02

02

F/A

Ch 1

01

01

WO

Ch 1

Diagnostic Status

00

00

MPA

Ch 1

Word 2

Word 3

Bit 00…15

(00…17)

Bit 00…15

(00…17)

Bit/Word Definitions for Block Transfer Read Words

Word

Read

Word 0

Word 1

Bit

Bit 00…15

(00…17)

Bit 00…15

(00…17)

Definition

Calculated value of frequency (channel 0) – frequency can be reported down to 1 or 1.0 Hz, depending on the Frequency Range bit setting:

Below a 1 Hz value, 0 is reported

Below a 1.0 Hz value, 0.0 is reported.

Calculated frequency depends on Minimum Sampling Time and Missing Pulse Multiplier.

% of Full Scale or Acceleration (channel 0) – Value of the calculated frequency scaled by the Maximum

Frequency, or Calculated Value of Acceleration in Hz/s, depending on the state of the Frequency or

Acceleration Alarm Select bit.

Note : Percentage Full scale is calculated accurately up to a maximum of 3,276.7%. Beyond this maximum, the value of 3,276.7% will be returned, and a Calculation Failure (9) will be set in the Diagnostic Status byte.

Calculated value of Frequency (channel 1) – Frequency can be reported down to 1 or 1.0 Hz, depending on the Frequency Range bit setting; below a 1 Hz value, 0 is reported; below a 1.0 Hz value, 0.0 is reported.

Calculated frequency depends on Minimum Sampling Time and Missing Pulse Multiplier.

Percentage of Full Scale or Acceleration (channel 1) – Value of the calculated Frequency scaled by the

Maximum Frequency, or Calculated Value of Acceleration in Hz/s, depending on the state of the Frequency or Acceleration Alarm Select bit. Percentage full scale will be calculated accurately up to a maximum of

3,276.7%. Beyond this maximum, the value of 3,276.7% is returned, and a Calculation Failure (9) is set in the Diagnostic Status byte.

Publication 1794-6.5.11 - September 2011

38 Read and Write Configuration Maps for the FLEX I/O Module

Bit/Word Definitions for Block Transfer Read Words

Word

Word 4

Bit

Bits 00

Bit 01

Definition

Missing Pulse Alarm (channel 1) – Indicates that no Frequency input pulse has occurred within the period determined by the Minimum Frequency Sampling Time and the Missing Pulse Multiplier. Primary control is given to the Missing Pulse Multiplier to determine when this bit is set. However, if the Missing Pulse

Multiplier is set to 0, then the Minimum Frequency Sampling Time characteristics will determine when this bit is set.

Wire Off Fault Alarm (channel 1) – when set, indicates that 24V DC Input (IEC 1+ or Switch Contact with shunt) Wire Off Detection has gone true for any of the Frequency or Gate inputs on a channel that has the

Wire Off Fault Select = 1.

Bit 02

Bit 03

Frequency or Acceleration Alarm (channel 1) – Changes state from 0…1 if the calculated Frequency (actual or scaled) exceeds the user programmed Maximum Frequency, or the absolute value of calculated

Acceleration/Deceleration exceeds the user programmed Maximum Acceleration Value.

The Frequency Alarm turns off when the Frequency drops below 95% of the Alarm Value.

The Acceleration Alarm turns off when the Acceleration drops below 90% of the Alarm Value.

Gate Input State (channel 1) – Indicates if there is a valid signal on the gate input. This parameter is only determined once every 0.5…2 s.

Bits 04…05 Direction (channel 1) – Indicates the current Direction of Rotation, using both the Frequency and Gate inputs. (Frequency leads Gate = Clockwise; Gate leads Frequency = CounterClockwise). Used for slow speed detection from 1…1,500Hz. No or Stopped rotation can be determined by the state of the Missing Pulse

Alarm, when it is switched on. A missing Frequency Input generates a Missing Pulse Alarm, a missing Gate

Input only generates a No Sensor Present/Detected status (3).

Bits 06…07 Not used

Bits 08 (10) Missing Pulse Alarm (channel 0) – Indicates that no frequency input pulse has occurred within the period determined by the Minimum Frequency Sampling Time and the Missing Pulse Multiplier. Primary control is given to the Missing Pulse Multiplier to determine when this bit is set. However, if the Missing Pulse

Multiplier is set to 0, then the Minimum Frequency Sampling Time characteristics determines when this bit is set.

Bit 09 (11)

Bit 10 (12)

Wire Off Fault Alarm (channel 0) – When set, indicates that 24V DC Input (IEC 1+ or Switch Contact with shunt) Wire Off Detection has gone true for any of the Frequency or Gate inputs on a channel that has the

Wire Off Fault Select = 1.

Frequency or Acceleration Alarm (channel 0) – Changes state from 0…1 if the calculated Frequency (actual or scaled) exceeds the user programmed Maximum Frequency, or the absolute value of calculated

Acceleration/Deceleration exceeds the user programmed Maximum Acceleration Value.

The Frequency Alarm turns off when the Frequency drops below 95% of the Alarm Value.

The Acceleration Alarm turns off when the Acceleration drops below 90% of the Alarm Value.

Bit 11 (13)

Bits 12…13

(14…15)

Gate Input State (channel 0) – Indicates if there is a valid signal on the gate input. This parameter is only determined once every 0.5…2 s.

Direction (channel 0) – Indicates the current Direction of Rotation, using both the Frequency and Gate inputs.

Frequency leads Gate = Clockwise

Gate leads Frequency = CounterClockwise

Bits 14…15

(16…17)

Used for slow speed detection from 1…1,500Hz. No or Stopped rotation can be determined by the state of the Missing Pulse Alarm, when it is switched on. A missing Frequency Input generates a Missing Pulse

Alarm, a missing Gate Input only generates a No Sensor Present/Detected status (3).

Not used

Publication 1794-6.5.11 - September 2011

Read and Write Configuration Maps for the FLEX I/O Module 39

Bit/Word Definitions for Block Transfer Read Words

Word

Word 5

Bit

Bits 00…03 Diagnostic Status – indicates the response from the module; a normal or non-normal

Bits 04…15

(04…17)

Definition operating condition.

Bit

Reserved

03

0

0

1

1

0

0

0

0

0

0

02

0

0

0

0

1

1

1

1

0

0

1010…1111

01

0

0

1

1

0

0

1

1

0

0

00

0

1

0

1

0

1

0

1

0

1

0 = Normal Operation (No Failure)

1 = Calibration Failure

2 = Configuration Failure

A Minimum Frequency Sample Time value other than 0…9 was selected.

3 = Message Failure

4 = Lead Break Detection Hardware Failure

5 = Major Hardware Failure

6 = EEPROM Failure

7 = RAM Failure

8 = ROM Failure

9 = Calculation Failure

The actual Frequency is greater than 32,767 Hz. or 3,276.7 Hz.

(overange).

The scaled Frequency is greater than 32,767 Hz. or 3,276.7 Hz.

(overange).

The % Full Scale calculation (based on Maximum Frequency) is

> 3,276.7%.

10…15 = Not Used

Block Transfer Write Word Assignments

1

2

3

(Octal Bit) 17

Dec. Bit

0

15

CF

4

05

05

FR

Ch 1

Maximum Frequency 0…32,767 or 0.0…3,276.7 or Absolute Value of Acceleration 0…32,767 – Channel 0

Frequency Scaling Divisor 0…255 Ch 0 Frequency Scaling Multiplier 0…255 Ch 0

WOFG

Ch 0

16

14

SSM FR

Ch 0

WOFF

Ch 0

15

13

IGI

Ch 0

14

12

Number Of Pulses

To Terminate

Sampling Ch 0

IFI

Ch 0

13 12 11

11 10 09

MPM

Ch 0

Minimum Frequency

Sample Time Ch 0

10

08

07

07

R

Init

St Up

Ch 0

06

06

LF

ACT Ch 0

04

04 03

Number Of Pulses To

Terminate Sampling

Ch 1

02 01 00

MPM

Ch 1

F/A AS

Ch 0

03

MPDM

Ch 0

02 01 00

Maximum Frequency 0…32,767 or 0.0…3,276.7 or Absolute Value of Acceleration 0…32,767 – Channel 1

WOFM

Ch 0

Publication 1794-6.5.11 - September 2011

40 Read and Write Configuration Maps for the FLEX I/O Module

Block Transfer Write Word Assignments

(Octal Bit) 17

Dec. Bit

5

6

15

16

14

15

13

14

12

13

11

Frequency Scaling Divisor 0…255 Ch 1

12

10

11

09

Where:

10

08

07

07

06

06

05

05

04

04

03

03

Frequency Scaling Multiplier 0…255 Ch 1

WOFG

Ch 1

WOFF

Ch 1

IGI

Ch 1

IFI

Ch 1

CF = Communication fault

SSM = Safe state mode

FR = Frequency Range

Ch = Channel

MPM = Missing Pulse Multiplier

R = Reserved

LF = Local fault mode

WOFF = Wire-off fault frequency

Minimum Frequency

Sample Time Ch 1

Init

St Up

Ch 1

ACT Ch 1 F/A AS

Ch 1

WOFG = Wire-off fault gate

IGI = Invert gate input

IFI = Invert frequency input

ACT = Acceleration Calculation Time

F/AAS = Frequency/Accel alarm select

MPDM = Missing pulse delay multiplier

WOFM = Wire-off fault mode

MPDM

Ch 1

02 01

WOFM

Ch 1

00

02 01 00

Bit/Word Definitions for the Block Transfer Write Words

Word Bit

Write Word 0 Bits 00…01

Definition

Missing pulse multiplier bits (channel 1) – used to modify the Minimum Frequency

Sampling Time to allow the frequency bandwidth to be more closely adjusted to the value needed to report the proper frequency and report a missing pulse more quickly.

Bits 02…04

Default = No multiplier; alarm generated immediately

Bit 01 00 Missing Pulse Multiplier

0 0 No Multiplier, normal mode with 2 s delay

0 1 X2

1 0 X8

1 1 X32

Number of pulses to terminate sampling (channel 1) – Lets you calculate Frequency when a specified number of input pulses have occurred. This allows earlier reporting of the frequency than the Minimum Frequency Sampling Time, when many input pulses are occurring. Accurate frequency determination is possible without waiting for the full

Minimum Frequency Sampling Time to expire.

Default = Minimum frequency sampling time

Bit 04 03 02 Number of pulses to terminate sampling

0 0 0

0 0 1

Use minimum frequency sampling time

2

0 1 0

0 1 1

1 0 0

1 0 1

1 1 0

1 1 1

4

8

16

32

64

128

Publication 1794-6.5.11 - September 2011

Read and Write Configuration Maps for the FLEX I/O Module 41

Bit/Word Definitions for the Block Transfer Write Words

Word

Word 0

(con’t.)

Bit

Bits 05

Definition

Frequency range bits (channel 1) – Specifies the Frequency Range of the Frequency input.

Bits 06

Bits 07

Bits 08…09

(10…11)

0 = 1…32767 (below 1 Hz reports 0);

1 = 1.0…3276.7 (below 1.0 Hz reports 0.0).

Default = 0

Local fault mode selection – determines how the Module Safe State data is used to control alarm outputs for bus communication and internal module faults.

Local Fault = Wire Off Fault or Missing Pulse Alarm.

0 = Safe states activated by bus communication only;

1 = Safe states activated by any failure (bus communication, internal module faults, and so on.)

Default = 0, safe states activated by bus communication only

Not used

Missing pulse multiplier bits (channel 0) – used to modify the Minimum Frequency

Sampling Time to allow the frequency bandwidth to be more closely adjusted to the value needed to report the proper frequency and report a missing pulse more quickly.

Bits 10…12

(12…14)

Default = No multiplier; alarm generated immediately

Bit 09

(11)

08

(10)

Minimum frequency sampling time

0 0

0 1

No Multiplier, alarm generated immediately (normal mode with 2 s delay)

X2

1 0

1 1

X8

X32

Number of pulses to terminate sampling (channel 0) – Lets you calculate Frequency when a specified number of input pulses have occurred. This allows earlier reporting of the frequency than the Minimum Frequency Sampling Time, when many input pulses are occurring. Accurate frequency determination is possible without waiting for the full

Minimum Frequency Sampling Time to expire.

Default = Minimum frequency sampling time.

Bit 12

(14)

11

(13)

10

(12)

Number of pulses to terminate sampling

0 0 0 Use minimum frequency sampling time

0 0

0 1

0 1

1 0

1

0

1

0

2

4

8

16

1 0

1 1

1 1

1

0

1

32

64

128

Publication 1794-6.5.11 - September 2011

42 Read and Write Configuration Maps for the FLEX I/O Module

Bit/Word Definitions for the Block Transfer Write Words

Word Bit

Bit 13 (15)

Definition

Frequency range bits (channel 0) – Specifies the Frequency Range of the Frequency input.

Word 1

Word 2

Bit 14 (16)

Bit 15 (17)

Bits 00…15

(00…17)

Bits 00…07

Bits 08…15

(10…17)

0 = 1…32767 (below 1 Hz reports 0);

1 = 1.0…3276.7 (below 1.0 Hz reports 0.0).

Default = 0

Safe state mode bit – selection determines how module alarm outputs react to bus communication and internal module faults

Local fault = Wire Off Fault or Missing Pulse Alarm

0 = Reset outputs

1 = Hold last state

Default = 0 (reset outputs)

Communication fault – Signals that communication has been interrupted on the network. The adapter signals that the module should execute its fault routine or go to the Safe State and control any Alarm Outputs accordingly. During normal startup, this bit must be set (1) by the user program to begin normal module operation of Alarm Outputs

(in effect, an output enable). When the adapter communication link is broken, the adapter will reset this bit (0). Adapter dependent.

Default = 0

Maximum frequency or absolute value acceleration/deceleration (channel 0) – Specifies the highest Frequency or absolute Acceleration/Deceleration value allowed on the

Frequency input. 0…32,767, 0.0…3,276.7 Hz. or 0…32,767 Hz/s depending on the

Frequency Range and Frequency/Acceleration Alarm Select bits.

Frequency scaling multiplier (channel 0) – Specifies a multiplier to scale the incoming

Frequency value, 0…255.

Default = 0 – no scaling multiplication performed (x1)

Frequency scaling divisor (channel 0) – Specifies divisor to scale the incoming Frequency value, 0…255.

Default = 0 – no scaling division performed (divided by 1)

Publication 1794-6.5.11 - September 2011

Read and Write Configuration Maps for the FLEX I/O Module 43

Bit/Word Definitions for the Block Transfer Write Words

Word

Word 3

Bit

Bits 00…01

Bits 02…03

Definition

Wire-Off/Missing Pulse fault select mode (channel 0) – Sets the mode for 24V DC IEC 1+

Wire Off Input Detection and Missing Pulse Detection result for any input (Frequency or

Gate). The Maximum Frequency is determined by Frequency Range bit and the

Maximum Frequency value, and the Minimum Frequency is determined by Frequency

Range bit. The Wire Off detect time (in mode 1, 2, & 3) is 2 seconds maximum.

Bit 01 00 Channel wire-off/missing pulse detection mode

0 0 Disabled

0

1

1

0

Alarm only (frequency unchanged)

Alarm and force frequency to maximum frequency value

(32767 or 3276.7 or maximum frequency value, 0).

Alarm and force frequency to minimum frequency value (0 or 0.0).

1 1

Missing pulse delay multiplier bits (channel 0) – Specifies the number of Missing Pulse

Alarms periods (Minimum Frequency Sampling Times) which is permitted before the alarm is raised, if enabled. Used to defeat the Missing Pulse Alarm during a system startup.

Bit 04

Bits 05…06

Default = 0 – No multiplier; alarm generated immediately (normal mode with 2 s extension delay)

Bit 03 02 Alarm periods before alarm generated

0 0

0

1

1

0

No multiplier; alarm generated immediately (normal mode with 2 s extension delay)

2 sample periods + 2 s delay before alarm

8 sample periods + 2 s delay before alarm

1 1 32 sample periods + 2 s delay before alarm

Frequency or Acceleration Alarm Select (channel 0) – Determines if the value in the

Maximum Frequency or Acceleration write word is a Frequency (actual or scaled) or

Acceleration Alarm value. If set to Frequency, Acceleration is not calculated.

0 = Frequency alarm

1 = Acceleration alarm

Default = 0 – frequency alarm

Acceleration Calculation Time (channel 0) – Specifies the number of Frequency Sample

Times over which the module calculates acceleration.

Bit 07

Default = 0 – Rolling Average (previous 4 samples)

Bit 06 05 Acceleration Calculation Time in Frequency Sample Times

0 0 Rolling Average (previous 4 samples)

0 1

1 0

8

16

1 1 32

Initiate Startup Select (channel 0) – Alerts a channel that if process start up is in progress to defeat the missing pulse alarm for a time determined by the missing pulse delay multiplier.

0 = Normal Run Mode;

1 = Startup Mode – defeat/delay Missing Pulse Alarm

Default = 0 – Normal Run Mode

Publication 1794-6.5.11 - September 2011

44 Read and Write Configuration Maps for the FLEX I/O Module

Bit/Word Definitions for the Block Transfer Write Words

Word

Word 3

Bit

Bit 07

Bits 08…11

(10…13)

Bit 12 (14)

Definition

Minimum Frequency Sampling Time (channel 0) – Specifies the minimum time (in ms) the module spends collecting pulses to determine the Frequency.

Bit 11

(13)

10

(12)

09

(11)

0 0 0

0 0 0

0 0 1

0 0 1

0 1 0

08

(10)

0

1

0

1

0

Minimum Frequency Sampling Time (in ms)

2

4

5

10

20

0 1 0

0 1 1

0 1 1

1 0 0

1

0

1

0

50

100

200

500

1 0 0 1 1000

1010…1111 not used – 2 ms default sample time used

Invert Select – Frequency Input (channel 0) – Selects whether to invert the Frequency input signal, if not using an Active High (24V = On) 24V DC IEC 1+ sensor or Normally

Open relay or switch contact on the 24V DC Frequency Input terminal. Allows compatibility with an Active Low (0V = On) 24V DC IEC 1+ sensor or Normally Closed relay contact on the 24V DC Frequency Input terminal.

Bit 13 (15)

Bit 14 (16)

0 = Normal (Active High, 24V = On),

1 = Invert input (Active Low, 0V = On).

Default = 0 – Normal (Active High, 24V = On)

Invert Select – Gate Input (channel 0) – Selects whether to invert the Gate input signal, if not using an Active High (24V = On) 24V DC IEC 1+ sensor or Normally Open relay or switch contact on the 24V DC Gate Input terminal. Allows compatibility with an Active

Low (0V = On) 24V DC IEC 1+ sensor or Normally Closed relay contact on the 24V DC

Gate Input terminal.

0 = Normal (Active High, 24V = On),

1 = Invert input (Active Low, 0V = On)

Default = 0 – Normal (Active High, 24V = On)

Wire Off Fault Select – Frequency Input (channel 0) – Selects whether to turn On or Off the 24V DC Frequency input IEC 1+ hardware Wire Off (Lead Breakage) detection.

0 = Disable,

1 = Enable

Default: = 0 – Disable

Bit 15 (17)

Note : Customer devices must draw more than 0.4 mA in the On and Off State. To use this feature with relays or switches, connect a shunt resistor (~ 50K) across the contacts.

Wire Off Fault Select – Gate Input (channel 0) – Selects whether to turn On or Off the

24V DC Gate input IEC 1+ hardware Wire Off (Lead Breakage) detection.

0 = Disable,

1 = Enable

Default = 0 – Disable

Note : Customer devices must draw more than.4 mA in the On and Off State. To use this feature with relays or switches, connect a shunt resistor (~ 50K) across the contacts.

Publication 1794-6.5.11 - September 2011

Read and Write Configuration Maps for the FLEX I/O Module 45

Bit/Word Definitions for the Block Transfer Write Words

Word

Word 4

Word 5

Bit

Bits 00…15

(00…17)

Bits 00…07

Definition

Maximum frequency or absolute value acceleration/deceleration (channel 1) – Specifies the highest Frequency or absolute Acceleration/Deceleration value allowed on the

Frequency input. 0…32,767 Hz, 0.0…3,276.7 Hz. or 0…32,767 Hz/s depending on the

Frequency Range and Frequency/Acceleration Alarm Select bits.

Frequency scaling multiplier (channel 1) – Specifies a multiplier to scale the incoming

Frequency value, 0…255.

Bits 08…15

(10…17)

Default = 0 – no scaling multiplication performed (x1)

Frequency scaling divisor (channel 1) – Specifies divisor to scale the incoming Frequency value, 0…255.

Default = 0 – no scaling division performed (divided by 1)

Publication 1794-6.5.11 - September 2011

46 Read and Write Configuration Maps for the FLEX I/O Module

Bit/Word Definitions for the Block Transfer Write Words

Word

Word 6

Bit

Bits 00…01

Bits 02…03

Definition

Wire-Off/Missing Pulse fault select (channel 1) – Sets the mode for 24V DC IEC 1+ Wire

Off Input Detection and Missing Pulse Detection result for any input (Frequency or Gate).

The Maximum Frequency is determined by Frequency Range bit and the Maximum

Frequency value, and the Minimum Frequency is determined by Frequency Range bit.

The Wire Off detect time (in mode 1, 2, and 3) is 2 seconds maximum.

Bit 01 00 Channel wire-off or missing pulse fault mode

0 0 Disabled

0 1 Alarm only (frequency unchanged)

1 0 Alarm and force frequency to maximum frequency value (32767 or

3276.7 or maximum frequency value, 0).

1 1 Alarm and force frequency to minimum frequency value (0 or 0.0).

Missing pulse delay multiplier bits (channel 1) – Specifies the number of Missing Pulse

Alarms periods (Minimum Frequency Sampling Times) which will be tolerated before the alarm is actually generated, if enabled. (Used to defeat the Missing Pulse Alarm during a system startup.)

Bit 04

Bits 05…06

Default = 0 – No multiplier; alarm generated immediately (normal mode with 2 s extension delay)

Bit 03 02 Alarm periods before alarm generated

0 0 No multiplier; alarm generated immediately (normal mode with 2 s extension delay)

0 1 2 sample periods + 2 s delay before alarm

1 0 8 sample periods + 2 s delay before alarm

1 1 32 sample periods + 2 s delay before alarm

Frequency or Acceleration Alarm Select (channel 1) – Determines if the value in the

Maximum Frequency or Acceleration write word is a Frequency (actual or scaled) or

Acceleration Alarm value. If set to Frequency, Acceleration is not calculated.

0 = Frequency alarm

1 = Acceleration alarm

Default = 0 – frequency alarm

Acceleration Calculation Time (channel 1) – Specifies the number of Frequency Sample

Times over which the module calculates acceleration.

Default = 0 – Rolling Average (previous 4 samples)

Bit 06 05 Acceleration Calculation Time in Frequency Sample Times

0 0 Rolling Average (previous 4 samples)

0 1 8

1 0 16

1 1 32

Publication 1794-6.5.11 - September 2011

Read and Write Configuration Maps for the FLEX I/O Module 47

Bit/Word Definitions for the Block Transfer Write Words

Word

Word 6

Bit

Bit 07

Definition

Initiate Startup Select (channel 1) – Alerts a channel that if process startup is in progress to defeat the missing pulse alarm for a time determined by the missing pulse delay multiplier.

Bits 08…11

(10…13)

Bit 12 (14)

0 = Normal run mode,

1 = Startup Mode – Defeat/delay Missing Pulse Alarm

Default = 0 – Normal run mode

Minimum Frequency Sampling Time (channel 1) – Specifies the minimum time (in ms) the module will spend collecting pulses to determine the Frequency.

Bit 11 10 09 08 Minimum Frequency Sampling Time (in ms)

0 0 0 0 2

0 0

0 0

0

1

1

0

4

5

0 0

0 1

0 1

0 1

0

1

1

0

1

0

1

0

10

20

50

100

0 1

1 0

1

0

1

0

200

500

1 0 0 1 1000

1010…1111 not used – 2 ms default sample time used

Invert Select – Frequency Input (channel 1) – Selects whether to invert the Frequency input signal, if not using an Active High (24V = On) 24V DC IEC 1+ sensor or Normally

Open relay or switch contact on the 24V DC Frequency Input terminal. Allows compatibility with an Active Low (0V = On) 24V DC IEC 1+ sensor or Normally Closed relay contact on the 24V DC Frequency Input terminal.

0 = Normal (Active High, 24V = On),

1 = Invert input (Active Low, 0V = On).

Default = 0 – Normal (Active High, 24V = On)

Publication 1794-6.5.11 - September 2011

48 Read and Write Configuration Maps for the FLEX I/O Module

Bit/Word Definitions for the Block Transfer Write Words

Word

Word 6

Bit

Bit 13 (15)

Definition

Invert Select – Gate Input (channel 1) – Selects whether to invert the Gate input signal, if not using an Active High (24V = On) 24V DC IEC 1+ sensor or “Normally Open” relay or switch contact on the 24V DC Gate Input terminal. Allows compatibility with an Active

Low (0V = On) 24 V DC IEC 1+ sensor or “Normally Closed” relay contact on the 24V DC

Gate Input terminal.

Bit 14 (16)

0 = Normal (Active High, 24V = On),

1 = Invert input (Active Low, 0V = On)

Default = 0 – Normal (Active High, 24V = On)

Wire Off Fault Select – Frequency Input (channel 1) – Selects whether to turn On or Off the 24V DC Frequency input IEC 1+ hardware Wire Off (Lead Breakage) detection.

0 = Disable,

1 = Enable

Default: = 0 – Disable

Bit 15 (17)

Note : Customer devices must draw more than 0.4 mA in the On and Off State. To use this feature with relays or switches, connect a shunt resistor (~ 50K) across the contacts.

Wire Off Fault Select – Gate Input (channel 1) – Selects whether to power On or Off the

24V DC Gate input IEC 1+ hardware Wire Off (Lead Breakage) detection.

0 = Disable,

1 = Enable

Default = 0 – Disable

Note : Customer devices must draw more than 4 mA in the On and Off State. To use this feature with relays or switches, connect a shunt resistor (~ 50K) across the contacts.

Input Map

3

4

1

2

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

Word Read

0 Frequency 0…32,767 or 0.0…3,276.7 Channel 0

5

6

Where:

% Full Scale 0.0…3,276.7% Channel 0 or Acceleration -32,768…32,767 Channel 0

Frequency 0…32,767 or 0.0…3,276.7 Channel 1

% Full Scale 0.0…3,276.7% Channel 1 or Acceleration -32,768…32,767 Channel 1

R R Direction

Ch 0

GS

Ch 0

F/A

Ch 0

WO

Ch 0

MPA

Ch 0

R R Direction

Ch 1

Reserved

Reserved

Diagnostic Status

Channel 0

R = Reserved

GS = Gate state

F/A = Frequency/Acceleration alarm

WO = Wire-off alarm

MPA = Missing pulse alarm

Reserved

GS

Ch 1

F/A

Ch 1

WO

Ch 1

Diagnostic Status

Channel 1

MPA

Ch 1

Publication 1794-6.5.11 - September 2011

Read and Write Configuration Maps for the FLEX I/O Module 49

4

5

Output Map

Dec

Oct

0

1

2

15

17

CF

14

16

13

15

SSM FR

Ch0

12 11 10

14 13 12

Number of pulses to terminate sampling

0…7 Ch 0

Maximum Frequency 0…32.767 or 0.0…3,276.7 - or -

Absolute Value of Acceleration - 0…32767 Channel 0

Frequency Scaling Divisor 0…255 Channel 0

09 08

11 10

MPM 0…3

Ch 0

3 WOFG

Ch0

WOFF

Ch0

IGI

Ch0

IFI

Ch0

Minimum Frequency

Sample Time 0…15

Ch 0

Maximum Frequency 0…32,767 or 0.0…3,276.7 - or -

Absolute Value of Acceleration – 0…32,767 Channel 1

Frequency Scaling Divisor 0…255 Channel 1

6 WOFG

Ch1

WOFF

Ch1

IGI

Ch 1

IFI

Ch 1

Minimum Frequency

Sample Time 0…15 Ch 1

7 Reserved

Where: CF = Communication fault

SSM = Safe state mode

FR = Frequency range

R = Reserved

MPM = Missing pulse multiplier

LF = Local Fault mode

F/AAS = Frequency/Accel alarm select

07

07

R

06 05

IGI = Invert gate input

04

06 05 04

LF FR

Ch 1

WOFF = Wire-off fault frequency

WOFG = Wire-off fault gate

WOFM = Wire-off fault mode

IFI = Invert frequency input

03

03

Number of pulses to terminate sampling

0…7 Ch 1

Frequency Scaling Multiplier 0…255

Channel 0

Init St

Up

Ch 0

ACT 0…3

Ch 0

F/AA

S Ch0

MPDM

0…3 Ch 0

WOFM

0…3 Ch0

Frequency Scaling Multiplier 0…255

Channel 1

Init St

Up

Ch 1

ACT 0…3

Ch 1

F/AAS

Ch 1

MPDM

ACT = Acceleration calculation time

02

02

0…3 Ch 1

MPDM = Missing pulse delay multiplier

01

01 00

MPM

0…3

Ch 1

WOFM

00

0…3 Ch 1

Chapter Summary

This chapter provided the user with data and instructions to configure and map FLEX I/O Frequency Input module data.

Publication 1794-6.5.11 - September 2011

50 Read and Write Configuration Maps for the FLEX I/O Module

Notes:

Publication 1794-6.5.11 - September 2011

Overview

35

Status Indicators

Chapter

5

Troubleshoot the Module

This chapter provides a description of the different status indicators for the frequency input module to help you troubleshoot.

Topic

Status Indicators

Diagnostics

Diagnostic Bits in Word 5 of the BTR File

Page

35

36

37

The module has indicators for the following:

• Frequency and Gate Inputs

• Frequency and Gate Wire-Off Faults

• Alarm Outputs

FREQUENCY INPUT 2 CHANNEL

1794-IJ2

1

0

FREQ

F 0

GATE

F 1

FREQ

F 1

GATE

F

OUT

0

OUT

1

OK

45348

A B C D E

A = Input indicator

B = Insertable label for writing individual I/O assignments

C = Wire-off fault indicator

D = Output indicator

E = Power/status indicator – indicates power applied to module and status of module

When an input indicator (yellow) is lighted, it indicates that a valid signal

(active high or active low) is present at one of the input terminals.

When wire-off detection is enabled, and a wire-off fault is detected (24V DC

IEC 1+ input terminal only), a fault indicator (red) flashes at a rate of 1 Hz to signal a fault condition. A wire-off fault signal is also sent to the backplane. A flashing red fault indication means a valid wire-off condition for a 24V DC

IEC 1+ Input or a 24V DC contact switch input with a shunt resistor.

Publication 1794-6.5.11 - September 2011

36 Troubleshoot the Module

Diagnostics

When an output indicator is yellow, the logic is driving an output alarm On.

After detecting a fault, the internal circuitry sets the output data to the appropriate safe state, as defined by the module data table. Safe state control may be adapter-dependent.

The input and output indicators are on the field side of the isolation path, and display the logic state of the actual microcontroller input and output.

The status indicator initially powers up as solid green, indicating the power supply is operating and internal diagnostic tests are being performed. After a successful power up test, the indicator remains green. The indicator turns red in about 1.5 s if there is an internal diagnostics error.

The module is operating correctly when the green OK indicator is on.

A red OK indicator shows that the module is in a Faulted condition, indicating an internal error.

Indicator

Input (0, 1)

Condition

Off (Dark)

(Freq. or Gate) On (Yellow)

Fault (F)

Output Alarm

(0, 1)

Status (OK)

Off (Dark)

(Freq. or Gate) On (Red

Flashing)

Off (Dark)

On (Yellow)

Off (Dark)

Solid Green

Solid Red

Operating Description

Input Turned Off, Input Not Used, or

Wire Disconnected

Input Turned On

(Active High or Active Low if Inverted)

Wire connected, normal operation or detection disabled

Wire disconnected, fault condition

(for IEC1 + Proximity switch or switch contacts with shunt resistor)

Output alarm turned off

Output alarm turned on (Logic Drive On)

24V Power Turned Off, or 5V Logic Power Problem

Module OK, Normal Operating Mode

Module Fault, Outputs Disabled

The frequency input module returns diagnostics to the PLC processor in Word

5 of the BTR file. These diagnostics give you information on the status or condition of the module.

Publication 1794-6.5.11 - September 2011

Troubleshoot the Module 37

Diagnostic Bits in Word 5 of the BTR File

15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00 word 5

See table, Diagnostic Bits in Word 5, for diagnostics

45375

Diagnostic Bits in Word 5

Word 5 Bits 00…03 Diagnostic Status – indicates the response from the module; a normal or non-normal operating condition.

Bit 03 02 01 00 Decimal equivalent and condition

0 0 0 0 0 = Normal operation (no failure)

0

0

0

0

0

1

1

0

1 = Calibration failure

2 = Configuration failure – a Minimum Frequency

Sample Time value other than 0…9 was selected

3 = Message failure

1

1

0

0

0

0

0

0

1

1

1

1

0

0

1

0

0

1

1

0

0

1

0

1

0

1

0

1

4 = Lead break detection hardware failure

5 = Major hardware failure

6 = EEPROM failure

7 = RAM failure

1010…1111

8 = ROM failure

9 = Calculation failure

The actual frequency is greater than 32,767 Hz or

3,276.7 Hz (overrange).

The scaled Frequency is greater than 32,767 Hz or

3,276.7 Hz (overrange).

The % Full Scale calculation (based on Maximum

Frequency) is > 3,276.7%.

10…15 = Not used

Chapter Summary

This chapter explained how to interpret the status indicators of the frequency input module and the internal diagnostics that indicates the condition of the module.

Publication 1794-6.5.11 - September 2011

38 Troubleshoot the Module

Notes:

Publication 1794-6.5.11 - September 2011

55

Appendix

A

Specifications

What This Appendix

Contains

This appendix contains the frequency accuracy and general specifications of the Frequency Input module (1794-IJ2, 1794-IJ2K, and 1794-IJ2XT).

Input Specifications

Attribute Value

Number of input channels 2

Number of inputs per channel

2 – Frequency and Gate

(gate used to establish direction)

Input frequency, max

Frequency value, max

Input pulse width

32 kHz

32,767 Hz or 3,276.7 Hz (dependent on range)

20

μ s

See table,

Resolution and Accuracy , on page 24

Resolution and accuracy

On-state voltage, min

On-state voltage, nom

(selected by terminal base connections)

10V (24V IEC+1 proximity, encoder input or switch inputs)

50 mV AC, 28V AC peak – Extended magnetic pickup

500 mV AC, 28V AC peak – Magnetic pickup

< 3V – Vortex flowmeter low range

> 6V – Vortex flowmeter high range

24V DC IEC+1 proximity or encoder input

24V DC Contact switch input

Limited to isolated 24V DC power supply On-state voltage, max

On-state current

Off-state current min nom max

2.0 mA

9.0 mA

10.0 mA

<1.5mA into 24V DC IEC+ terminal

Off-state voltage, max 5.0V DC on 24V DC IEC+1 terminal

Wire-off detection

Gate input impedance

0.4 mA for proximity, encoder or contact switch with

50 k

Ω

shunt resistor

Frequency input impedance >5 K

Ω

for 50 mV Extended magnetic pickup

>5 K

Ω

for 500 mV Magnetic pickup

>10 K

Ω

for 3V Vortex flowmeter low range

>10 K

Ω

for 6V Vortex flowmeter high range

>2.5 K

Ω

for 24V DC IEC+1 proximity or encoder input

>2.5 K

Ω

for 24V DC Contact switch input

>5 K

Ω

for 50 mV Extended magnetic pickup

>5 K

Ω

for 500 mV Magnetic pickup

>2.5 K

Ω

for 24V DC IEC+1 proximity or encoder input

>2.5 K

Ω

for 24V DC Contact switch input

Publication 1794-6.5.11 - September 2011

56 Specifications

Publication 1794-6.5.11 - September 2011

Output Specifications

(1)

Attribute

Number of outputs

Output voltage source

Output voltage min nom max

On-state current, min

On-state current, max

Surge current

Off-state leakage, max

On-state voltage drop

Output control

Output switching time

Value

2 – isolated

Customer supplied

10V DC

24V DC

31.2V DC

1 mA per output

1.0 A per channel sourced out of module

Current Limited – All outputs can be On simultaneously without derating

2 A for 50 ms, repeatable every 2 s

Less than 300

μ

A @ 31.2V DC

0.9V DC @ 1 A

Outputs individually assignable to:

Frequency, % Full scale or acceleration alarm

Triggered by frequency alarm or acceleration alarm

Turn on: Less than 0.5 ms

Turn off: Less than 1 ms

(1)

Meets IEC 1A 24V DC output specifications.

General Specifications

Attribute

Module location

External DC power

Voltage range

Supply voltage, nom

Supply current

Isolated DC power

Voltage range

Supply voltage, nom

Supply current, max

Peak AC ripple, max

Dimensions (with module installed in base) HxWxD

Isolation voltage

Processing time

FlexBus current

Value

Cat. No. 1794-TB3G and 1794-TB3GS terminal base units

(Input for +5V logic and 24V DC/DC converters)

19.2…31.2V DC (includes 5% AC ripple)

24V DC

220 mA @ 19.2V DC

180 mA @ 24V DC

140 mA @ 31.2V DC

(Output to sensors and encoders)

21.6…26.4V DC

24V DC

0…60 mA @ 24V DC

(4 devices @ 15 mA = 60 mA)

100 mV

94 x 94 x 69 mm

(3.7 x 3.7 x 2.7 in.)

50V (continuous), Basic Insulation Type

Type tested @ 1365V AC for 60 s, between field side and system and individual channels

<4 ms

30 mA @ 5V DC

Specifications 57

General Specifications

Attribute

Power dissipation, max

Thermal dissipation, max

Indicators (field side driven, logic side indication)

Keyswitch position

Wire size

Wiring category

(1)

Wire type

Terminal screw torque

Enclosure type rating

North American temp code

IEC temp code

Value

4.6W @ 31.2V DC

15.6 BTU/hr @ 31.2V DC

1 green/red power/status indicator

4 yellow status indicators (Freq 0, 1, Gate 0, 1)

4 red wire-off indicators (Freq 0, 1, Gate 0, 1)

2 yellow status indicators (Out 0, Out 1) – logic side

1

Determined by installed terminal base

2 – on signal ports

3 – on power ports

Shielded on signal ports

Determined by installed terminal base

None (open-style)

T4A

T4

(1)

Use this Conductor Category information for planning conductor routing. Refer to Industrial Automation Wiring and Grounding Guidelines, publication 1770-4.1

.

Environmental Specifications

Attribute Value

Temperature, operating 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):

0…55 °C (32…131 °F) – 1794-IJ2 and 1794-IJ2K

-20…70 °C (-4…158 °F) – 1794-IJ2XT

Temperature, non-operating

IEC 60068-2-1 (Test Ab, Unpackaged Non-operating Cold),

IEC 60068-2-2 (Test Bb, Unpackaged Non-operating Dry Heat),

IEC 60068-2-14 (Test Na, Unpackaged Non-operating

Thermal Shock):

-40…85 °C (-40…185 °F)

Relative humidity

Vibration

IEC 60068-2-30 (Test Db, Unpackaged Damp Heat):

5…95% noncondensing

IEC 60068-2-6 (Test Fc, Operating):

5 g @ 10…500 Hz

Shock, operating

Shock, non-operating

Emissions

IEC 60068-2-27 (Test Ea, Unpackaged Shock):

30 g

IEC 60068-2-27 (Test Ea, Unpackaged Shock):

50 g

CISPR 11:

Group 1, Class A (with appropriate enclosure)

Publication 1794-6.5.11 - September 2011

58 Specifications

Environmental Specifications

Attribute

ESD immunity

Value

IEC 61000-4-2:

4 kV contact discharges – 1794-IJ2 and 1794-IJ2K

6 kV contact discharges – 1794-IJ2XT

8 kV air discharges

EFT/B immunity

Surge transient immunity

IEC 61000-4-4:

±2 kV @ 5 kHz on power ports

±2 kV @ 5 kHz on shielded signal ports

IEC 61000-4-5:

±2 kV line-earth(CM) on shielded signal ports

Conducted RF immunity IEC 61000-4-6:

10V rms with 1 kHz sine-wave 80% AM from

150 kHz…80 MHz on shielded signal ports

Certifications

Certifications when product is marked

(1) c-UL-us

Value

UL Listed Industrial Control Equipment, certified for US and

Canada. See UL File E65584.

CSA

(1794-IJ2, 1794-IJ2K)

CE

C-Tick

Ex

TÜV

UL Listed for Class I, Division 2 Group A,B,C,D Hazardous

Locations, certified for U.S. and Canada. See UL File E194810.

CSA Certified Process Control Equipment. See CSA File LR54689C.

CSA Certified Process Control Equipment for Class I, Division 2

Group A,B,C,D Hazardous Locations. See CSA File LR69960C.

European Union 2004/108/EC EMC Directive, compliant with:

EN 61326-1; Meas./Control/Lab., Industrial Requirements

EN 61000-6-2; Industrial Immunity

EN 61000-6-4; Industrial Emissions

EN 61131-2; Programmable Controllers (Clause 8, Zone A & B)

Australian Radiocommunications Act, compliant with:

AS/NZS CISPR 11; Industrial Emissions

European Union 94/9/EC ATEX Directive, compliant with:

EN 60079-15; Potentially Explosive Atmospheres, Protection "n"

(II 3 G Ex nA IIC T4 X)

EN 60079-0; General Requirements (Zone 2)

TÜV Certified for Functional Safety: up to and including SIL 2

(1)

See the Product Certification link at http://www.ab.com

for Declaration of Conformity, Certificates, and other certification details.

Publication 1794-6.5.11 - September 2011

59

Overview

Appendix

B

Electronic Data Sheet (EDS) Files

EDS provides the definition for a device's configurable parameters and public interfaces to those parameters:

• Every type of configurable device has its own unique EDS.

• EDS is a simple text file that allows product-specific information to be made available to third-party vendors.

This makes updating of configuration tools easier without having to constantly revise the configuration software tool.

Beginning with the following revisions, EDS files are required for RSNetworx for Devicenet and ControlNet, RSLinx, RSLogix5, and RSLogix 5000 to recognize a device:

RSNetworx

RSLinx

RSLogix 5

RSLogix 5000

Version 2.21

Version 1.10.176

Version 4.0

Version 5.12

Updating EDS File

Most EDS files are installed with RSLinx, RSNetworx, and other RSI software as long as you enable the option during installation.

There are instances where you will need to acquire and register EDS files on your own even after all software is installed.

• If you go online with RSNetworx and it shows a device with a "?" mark icon, a globe, or a message that says the device is unrecognized, this means the EDS file for that device does not exist on your PC.

• If RSLinx can see a processor but going online, uploading or downloading is not possible.

With ControlLogix modules the backplane does not show after expanding the tree or ControlLogix modules in the backplane show up as a yellow question mark without a red X sign.

An EDS file is also required if a bridge module such as a 1756-CNB or DNB does not show the "+" sign to expand the tree to show its network.

Publication 1794-6.5.11 - September 2011

60 Electronic Data Sheet (EDS) Files

To acquire EDS files for Rockwell Automation and Allen-Bradley devices, go to Tools & Resources EDS Files at www.ab.com/networks/eds . It allows you to search for devices by the type of network and their catalog number.

ATTENTION

•Make sure to match the major firmware revision of the device as each major firmware revision is associated with a specific

EDS file.

•Download the EDS file and place it in any folder, except the

/Program Files/Rockwell Software/RSCommon/EDS folder where your Rockwell Automation software is installed.

•Register EDS files with RSNetworx by selecting Tools EDS

Wizard.

•Select Register an EDS File, then click the Browse button on the Next page to find your file.

EDS Installation

You can register EDS files with the EDS Hardware Installation tool.

1.

In Windows, go to Rockwell Software → RSLinx Tools → EDS

Hardware Installation Tool.

2.

Click Add to register an EDS file.

When an EDS file is registered, a copy of the file is made and placed in the /RSCommon/EDS folder where your Rockwell Automation software is installed and your Windows registry is updated. Once the registration is complete you can move, copy, or delete the original files.

Publication 1794-6.5.11 - September 2011

61

Appendix

C

Schematics

What This Appendix

Contains

Use this appendix to understand the internal logic of the FLEX I/O

Frequency Input module.

Follow the wiring practices described in Industrial Automation Wiring and

Grounding Guidelines for Noise Immunity, publication 1770-4.1

, when wiring your I/O devices. This includes:

• routing conductors

• grounding practices

• use of shielded cables

• input circuits

The frequency input module input logic consists of:

• frequency input circuits

• gate input circuits

• Frequency Inputs

The frequency input circuit uses a comparator to determine when the input voltage threshold is exceeded. When exceeded, it provides logic pulses internal to the 1794 Frequency Input module. The circuit is designed to interface with both active or passive sensor inputs by accepting any pulse output device (such as vortex flowmeter, magnetic pickup or digital pickup).

Gate Inputs

Gate inputs are similar to frequency inputs and are used for determining direction. There is one gate associated with each frequency input circuit (G0 corresponds to F0). The circuit is designed to interface with both active or passive sensor inputs by accepting any pulse output device (such as magnetic pickup or digital pickup).

Publication 1794-6.5.11 - September 2011

62 Schematics

Isolated 24V power (F and G,

15 mA each)

24V

IEC 1+ or

24V DC

Switch input

50/500 mV

Input

2.5 KW

5.11 KW

2.15 KW

6V Vortex input

Frequency only, not on gate

8.25 KW 100 KW

100 pF

3V Vortex input

8.25 KW 46.4 KW

100 pF

2.15 KW

100pF

Internal 500 mV

Ref. Voltage

50 mV Select jumper

825 W

Return

215 W

Lead breakage

Reference voltage

-

+

10 KW

100 pF

Frequency lead break

(Gate lead break)

47 pF

(Gate) input

-

+

Invert frequency

Ex

Nor

10 KW

100 pF

Frequency input

(Gate input)

45354

Output Circuits

The Frequency Input module output logic consists of digital outputs.

Digital Outputs

The module output is comprised of an isolated power MOSFET. This device operates in current sourcing mode, and is capable of delivering up to

1 A @ 10…31.2V DC.

Publication 1794-6.5.11 - September 2011

Schematics 63

.

Output channel

3.83 KW

10 KW

3.83 KW

Supply

D5

6.8V

Q1 s

D6

Output

TEMPFET

Output 0

RT1

Alarm

10-31.2V

DC

R load

1A max

Supply return

Customer supplied power, ranging from 10V…31.2V DC, is connected internally to the power output transistor.

When an output is turned on, current flows into the source, out of the drain, through the load connected to the ground of the customer supply (customer return). Diode D6 protects the power output transistors from damage due to inductive loads.

45355

Output Q1 is a thermally protected FET and will turn off @ 3A, approximately. After an output goes into thermal shutdown, you must fix the cause of the shutdown and toggle the outputs ON and OFF to reenergize the output.

RT1 protects D6 and Q1 if power supply polarity is reversed.

24V DC from terminal base

DC to DC Converters – 24V DC Power Supplies

The module provides two 24V (±10%) power sources rated at 15 mA each.

Each power source can power one Bently Nevada 3300 – 5 mm (0.197 in.) or

8 mm (0.315 in.) – Proximity Transducer.

DC/DC converter

Channel 0 current limit

Channel 1 current limit

Frequency 0 15 mA

Gate 0 15 mA

30 mA max

To customer devices

Frequency 1 15 mA

Gate 1 15 mA

30 mA max

45356

The frequency input module isolated power supply consists of 1 isolated 24V DC power supply that provides 2 current limited outputs of 30 mA max (1 for each channel).

Publication 1794-6.5.11 - September 2011

64 Schematics

Notes:

Publication 1794-6.5.11 - September 2011

65

Appendix

D

Program Your Module with PLC Processors

Overview

Enter Block Transfer

Instructions

This Appendix serves as a reference to users of the PLC-* Family Processors to program their modules.

To initiate communication between the frequency input module and your PLC processor, you must enter block transfer instructions into your ladder logic program. Use this chapter to enter the necessary block transfer instructions into your ladder logic program.

The frequency input module communicates with the PLC processor through bidirectional block transfers. This is the sequential operation of both read and write block transfer instructions.

Before you configure the module, you need to enter block transfer instructions into your ladder logic. The following example programs illustrate the minimum programming required for communication to take place between the module and a PLC processor. These programs can be modified to suit your application requirements.

A configuration block transfer write (BTW) is initiated when the frequency module is first powered up, and subsequently only when the programmer wants to enable or disable features of the module. The configuration BTW sets the bits which enable the programmable features of the module, such as scalars and alarm values, and so on. Block transfer reads are performed to retrieve information from the module.

Block transfer read (BTR) programming moves status and data from the module to the processor data table. The processor user program initiates the request to transfer data from the module to the processor. The transferred words contain module status, channel status and input data from the module.

Your program should monitor status bits, block transfer read and block transfer write activity.

Publication 1794-6.5.11 - September 2011

66 Program Your Module with PLC Processors

PLC-2 Family Processor

The 1794 Frequency I/O module is not recommended for use with PLC-2 family programmable controllers due to the number of digits needed for high resolution.

IMPORTANT

The frequency input module functions with reduced performance in PLC-2 systems. Because the module does not support BCD and the PLC-2 processor is limited to values of

4095 (12 bit binary), many values returned in the BTR file may not provide meaningful data to the PLC-2 processor.

PLC-3 Family Processor

Block transfer instructions with the PLC-3 processor use a control file and a data file. The block transfer control file contains the data table section for module location, the address of the block transfer data file and other related data. The block transfer data file stores data that you want transferred to the module (when programming a BTW) or from the module (when programming a BTR).

The programming terminal prompts you to create a control file when a block transfer instruction is being programmed. The same block transfer control file is used for both the read and write instructions for your module. A different block transfer control file is required for every module.

Publication 1794-6.5.11 - September 2011

Program Your Module with PLC Processors 67

PLC-3 Processor

Program Example

Rung M:0

The IJ2 module is located in rack 3, I/O group 2, slot 0. The control file is a 10 word file starting at B17:0 that is shared by the BTR/BTW. The data obtained by the PLC3 processor is placed in memory starting at location N18:101, and with the default length of 0, is 7 words long.

IJ2 BTR

Done Bit

B17:0

15

IJ2 BTR/BTW

Control Block

BTR

BLOCK TRANSFER READ

Rack 3

Group

Slot

Control

2

0

B17:0

Data File

Length

N18:101

0

EN

DN

ER

IJ2 BTR

Error Bit

B17:0

13

IJ2 BTR

Error Bit

B17:0

U

13

The IJ2 module is located in rack 3, I/O group 2, slot 0. The control file is a 10 word file starting at B17:0 that is shared by the BTR/BTW. The data sent by the PLC-3 processor to the

IJ2 module is from PLC memory starting at N18:1, and with the default length of 0, is 8 words long.

IJ2 BTW

Done Bit

B17:0

5

IJ2 BTR/BTW

Control Block

BTW

BLOCK TRANSFER WRITE

Rack

Group

Slot

3

2

0

Control

Data

Length

B17:0

N18:1

0

EN

DN

ER

IJ2 BTW

Error Bit

B17:0

3

IJ2 BTW

Error Bit

B17:0

U

3

45563

PLC-5 Family Processor

Block transfer instructions with the PLC-5 processor use a control file and a data file. The block transfer control file contains the data table section for module location, the address of the block transfer data file and other related data. The block transfer data file stores data that you want transferred to the module (when programming a BTW) or from the module (when programming a BTR).

The programming terminal prompts you to create a control file when a block transfer instruction is being programmed. A different block transfer control file is used for the read and write instructions for your module.

Publication 1794-6.5.11 - September 2011

68 Program Your Module with PLC Processors

PLC-5 Processor

Program Example

Rung 2:0

The IJ2 module is located in rack 1, I/O group 2, slot 0. The integer control file starts at N22:200, is 5 words long and is compatible with all PLC-5 family members.

The data obtained by the PLC-5 processor from the IJ2 module is placed in memory starting at N22:101, and with the default length of 0, is 7 words long. The length

1 can be any number between 0 and 7. In enhanced PLC-5 processors, the block transfer data type may be used as a control file.

IJ2 BTR

Enable Bit

N22:200

15

IJ2 BTW

Enable Bit

N22:205

15

IJ2 BTR

Control File

BTR

BLOCK TRANSFER READ

Rack

Group

Slot

Control

Data File

Length

01

2

0

N22:200

N22:101

0

Continuous N

EN

DN

ER

Rung 2:1

The IJ2 module is located in rack 1, group 2, slot 0. The integer control file starts at N22:205, is a 5 words long and is compatible will all PLC-5 family members. The data sent by the PLC-5 processor to the IJ2 module starts at N22:1, and with the default length of 0, is 8 words long. Valid BTW lengths can be any may be used as a control file.

IJ2 BTR

Enable Bit

N22:200

IJ2 BTW

Enable Bit

N22:205

15 15

IJ2 BTW

Control File

BTW

BLOCK TRANSFER WRITE

Rack

Group

01

2

Slot

Control

Data File

Length

Continuous

0

N22:205

N22:1

0

N

EN

DN

ER

1 Enhanced PLC-5 processors include: PLC-5/11, -5/20, -5/3x, -5/4x, and -5/6x.

45564

PLC-5/250 Family Processor

Block transfer instructions with the PLC-5/250 processor use a control file and a data file. The block transfer control file contains the data table section for module location, the address of the block transfer data file and other related data. The block transfer data file stores data that you want transferred to the module (when programming a BTW) or from the module (when programming a BTR).

The programming terminal automatically selects the control file based on rack, group and module, and whether it is a read or write. A different block transfer control file is used for the read and write instructions for your module. A different block transfer control file is required for every module.

Publication 1794-6.5.11 - September 2011

Program Your Module with PLC Processors 69

PLC-5/250 P r ocesso r

Program Example

R un g 1STEPO:1

The IJ2 module is located in rack 14, I/O group 1, slot 0. The data obtained by the PLC-5/250 processor from the

IJ2 module is placed in the data table starting at 2BTD5 : 101, and with the default length of 0, is 7 words long. The length can be any number between 0 and 7.

IJ2 BTR

Enable Bit

BR141 : 0

EN

IJ2 BT W

Enable Bit

B W 141 : 0

EN

IJ2 BTR

Control File

BTR

BLOCK TRAN S FER READ

Rack

Group

S lot

Control Block

Data File

BT Length

Continuous

BT Timeout

14

1

0

BR141 : 0

2BTD5 : 101

0

NO

4

EN

DN

ER

R un g 1STEPO:1

The IJ2 module is located in rack 14, I/O group 1, slot 0. The data sent to the IJ2 module from the PLC-5/250 processor is from the data table starting at 2BTD5 : 1, and with a default length of 0, is 8 words long.

V alid BT W lengths can be any number between 0 and 8.

IJ2 BTR

Enable Bit

BR141 : 0

EN

IJ2 BT W

Enable Bit

B W 141 : 0

EN

IJ2 BT W

Control File

BT W

BLOCK TRAN S FER W RITE

Rack

Group

S lot

Control Block

Data File

BT Length

Continuous

BT Timeout

14

B W 141 : 0

2BTD5 : 1

1

0

0

NO

4

EN

DN

ER

45565

Publication 1794-6.5.11 - September 2011

70 Program Your Module with PLC Processors

Notes:

Publication 1794-6.5.11 - September 2011

Numerics

1756-ENBT 29

1794-ACN15

4

1794-ACNR1 4

1794-ACNR15K

4

1794-ADN

4

1794-AENT 4

1794-APB

4

1794-APBDPV1

4

1794-ASB

4

1794-IJ2

application 7 capabilities 7

features 8

installation 13

mode 7

operation 8

output capabilities 7

power requirements 13

wiring 21

1794-IJ2K

2

1794-IJ2XT 2

1794-TB3G 18, 20, 21, 22

1794-TB3GK

20, 21

1794-TB3GS

18, 20, 21, 22

A

acceleration

absolute value 39

alarm 43, 46

calculation 33, 40, 43, 46

accuracy

7, 24, 25

adapter

1, 3, 5, 15, 16, 17, 18, 22, 52

capabilities 20

data transfer 3

maximum capacity 20

alarm

acceleration 38, 43

frequency 8, 43

missing pulse 9, 26, 38, 46, 47

output 24, 52

output alarm connections 24

wire-off 38

pulses to terminate sampling 33

Index

application 7, 8

B

backplane

13, 16, 19, 51

bandwidth

10

bits words

acceleration 38, 43

communication fault 42

definition 40

diagnostic 53

direction 38 fault 38

frequency alarm 46 frequency range 42, 46

frequency scaling 42, 45

gate input state 38

initiate startup 47

input polarity 11

invert select 47

missing pulse 40

missing pulse delay 46

pulse 38, 40

pulses

wire-off 43, 46

block transfer read (BTR)

bit definition 37 bits 37

decimal bit 36

gate state 37

octal bits 36 word assignments 36

block transfer write (BTW)

bit definition 40 communication fault 40

decimal bits 39

frequency range 40, 41

initiate startup 47

instructions 3

invert frequency 40 invert gate 40 local fault 40

safe state 42

wire-off 40 missing pulse multiplier 40 safe state mode 40

C

cable shields 23

cabling

length 22 power 22

Publication 1794-6.5.12 - September 2011

72 Index calibration

failure 39, 53

chassis 13, 21, 22

combination type 21

communication

3, 4, 40, 41, 63, 69

CompactLogix 29

configuration

alarms 35 block transfer write 35

failure 39, 53

fault action 32

fault modes 35

individual 21

module properties 33

number of pulses 35

connector

female 15

FlexBus 16, 16, 19

male 15

contact switch

23

controller

3, 5, 7, 29, 64, 70

ControlLogix 29

ControlNet 29

current draw

14, 20, 23

total 20

D

daisychain

14, 21, 22

data map 35

data table

35

data transfer 3

deceleration 42, 45

device

2-wire 23

input 3

magnetic 23

diagnostic

39 calculation 39

calculation failure 53

calibration 39, 53 configuration 39

EEPROM 39

error 52

hardware 39 message 39

normal operation 39, 53

RAM 39

ROM 39, 53 status 53

test 52

Publication 1794-6.5.12 - September 2011 dimensions

drilling 17

DIN rail

15, 16

direction detection

11 low to high transition 11

drilling 17

E

EEPROM

failure 39, 53

Ethernet 29

F

failure

calculation 53 calibration 53 configuration 53

EEPROM 53

fault

hardware 53 message 53

RAM 53

ROM 53

communication 42

gate wire-off 51 indicator 51

local 40, 41

missing pulse 46

mode 32

wire-off 38, 41, 40, 51

female connector

15

FLEX I/O

adapter 3

components 1

family 3

frequency input 13, 21 module 13 system 1, 2, 13

FlexBus

14, 15, 16, 19

frequency

alarm 7, 43

algorithm 2, 10

bandwidth 40

calculation 3, 8, 9, 39

determination 10

formula 8

input 7, 42, 44

input pulses 3

minimum sample time (ms) 8, 25, 44

maximum 32, 39, 43, 46

measurement 3

minimum 46

minimum sample time 32, 33, 41, 47

overange 39

parameters 8

percentage full scale 7

range 32, 33, 35

range bit setting 24

scale 7

zero 9

G

gate input

low to high transition 11

gate state 26

GND connection 24

H

hardware

failure 53

major failure 39, 53

hazardous location

19

I

I/O module

2, 3

IEC 1131-2

23

indicator

condition 52 description 52

fault 51 gate inputs 51

input 51, 52

output 51 power 51 wire-off fault 51

input

acceptable frequency 2

application 5

channel 6, 7

configuration 35 data maps 35

device 3

frequency 7, 11, 42, 44

gate 6, 11, 38

indicator 51, 52

map 25, 48

pulses 3, 41

read words 36

scaling calculation 3

scaling divisor 45

signals 6

Index 73

types 23

usage 3

wire-off detection 46

write words 36

installation

14, 15

drilling dimension 16, 17

hazardous location 19

instructions 13 module position 13

mounting kit 17

requirements 13

terminal base 14, 18

wall or panel mounting 16

wiring 14

J

jumper 23

K

keyswitch 13, 18

L

ladder program 4

lead break

48, 53

local fault mode

41

location

hazardous 19

Logix system 5

M

magnetic pickup 6, 23

male connector 15

manuals

common techniques xii conventions xii

related x

message

failure 39, 53

microcontroller 52

missing pulse

9, 10, 38,

43

module

acceleration calculation 46

faults 41

frequency input 6

position 22

safe state 41

status 52

Publication 1794-6.5.12 - September 2011

74 Index

MSG instructions 5

O

oil and gas 5

operation

mode 7

non-normal 39 normal 39, 53

unintended 14

output 52 alarm 52

connections 24

current 7

data 36

fused 7

indicator 51, 52

isolated 7

supply 24

output map

acceleration calculation 26, 49 communication fault 26, 49 frequency range 26, 49 invert frequency input 26, 49 invert gate input 26, 49

local fault mode 26, 49

missing pulse multiplier 26, 49 safe state mode 26, 49

wire-off fault frequency 26, 49 wire-off fault gate 26, 49

wire-off fault mode 26, 49

outputs

41

capabilities

output 7

P

panel

mounting 16

parameters

8, 10

percentage full scale 37

PLC

52

PLC 5 29

processor 63, 69

PLC-2 64, 70

PLC-3 64, 70

PLC-5/250 66, 72 power

backplane 19

cabling 22

connections 14

current draw 13

Publication 1794-6.5.12 - September 2011

indicator 51

module 22

operational 13

requirements 13, 14

supply 22, 52

processor 3, 7, 35, 52

Profibus 29

programming

PLC-2 64, 70

PLC-3 64, 70

PLC-5/250 66, 72 proximity probe

6

publication

related x

pulse

alarm 7

missing 10, 38, 40, 41, 43, 46, 47

termination 39, 41

R

RAM

failure 39, 53

range bit 37

read programming 35

read words

35, 36, 37

Requested Packet Interval (RPI) 31

resistor

23

resolution 25

ROM

failure 39

rotation

clockwise 11 counterclockwise 11

direction 38

RSLogix 5000

29, 32

S

safe state

52

sampling time

8, 25, 35, 44

scaling 8

sensors

11

shunt resistor

44, 48, 51

SLC 29

specification

DIN rail 15

startup select 43

status

alarm outputs 51

diagnostic 39

frequency and gate inputs 51

indicator 52

T

tags

5

terminal base

1, 13, 14, 15, 17, 19

grounding 22

installation 14 mount 14 replace 14 wiring 14, 21 wiring methods 14

throughput 8

troubleshoot

51

turbine metering

5

V

vortex flowmeter 6

W

wire off

33, 44,

26

wiring

1794-TB3G, 1794-TB3GS, 1794-TB3GK 21 frequency module 21

illustration 14, 20 methods 14

onnecting 22

terminal base 21

word definition

37, 40

write word

39, 35, 40

Z

zero frequency

9

Index 75

Publication 1794-6.5.12 - September 2011

76 Index

Notes:

Publication 1794-6.5.12 - September 2011

Rockwell Automation Support

Roc kw ell Automation provides technical information on the Web to assist you in using its products .

At http:// www.

roc kw ellautomation .

com/support/ , you can find technical manuals, a k no w ledge base of FAQs, technical and application notes, sample code and lin k s to soft w are service pac k s, and a MySupport feature that you can customize to ma k e the best use of these tools .

For an additional level of technical phone support for installation, configuration, and troubleshooting, w e offer TechConnect support programs .

For more information, contact your local distributor or Roc kw ell Automation representative, or visit http:// www.

roc kw ellautomation .

com/support/ .

Installation Assistance

If you experience a problem w ithin the first 24 hours of installation, revie w the information that is contained in this manual .

You can contact Customer Support for initial help in getting your product up and running .

United States or Canada

Outside United States or

Canada

1.440.646.3434

Use the Worldwide Locator at http://www.rockwellautomation.com/support/americas/phone_en.html

, or contact your local Rockwell Automation representative.

New Product Satisfaction Return

Roc kw ell Automation tests all of its products to ensure that they are fully operational w hen shipped from the manufacturing facility .

Ho w ever, if your product is not functioning and needs to be returned, follo w these procedures .

United States

Outside United States

Contact your distributor. You must provide a Customer Support case number (call the phone number above to obtain one) to your distributor to complete the return process.

Please contact your local Rockwell Automation representative for the return procedure.

Documentation Feedback

Your comments w ill help us serve your documentation needs better .

If you have any suggestions on ho w to improve this document, complete this form, publication RA-DU002 , available at http:// www.

roc kw ellautomation .

com/literature/ .

Rockwell Otomasyon Ticaret A.Ş., Kar Plaza İş Merkezi E Blok Kat:6 34752 İçerenköy, İstanbul, Tel: +90 (216) 5698400

Publication 1794-6.5.11 - September 2011 77

Supersedes publication 1794-6.5.11 - November 1997 Copyright © 2011 Rockwell Automation, Inc. All rights reserved.