Rockwell Automation Allen-Bradley 1794-IJ2XT, Allen-Bradley 1794-IJ2K, Allen-Bradley 1794-IJ2 User Manual

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Page 1

FLEX I/O Frequency Input Module

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

Page 2

Important User Information

WARNING

IMPORTANT

ATTENTION

SHOCK HAZARD

BURN HAZARD

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

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.

available from your local Rockwell Automation sales office or online at

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.

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

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.

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

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.

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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.

New and Updated Information

This table contains the changes made to this revision.

Topic Page

Inclusion of two catalogs, 1794-IJ2K and 1794-IJ2XT 1 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. 20 The following topics have been added:

•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.

35 59 55

iii Publication 1794-6.5.11 - September 2011

Page 4

iv Summary of Changes

Notes:

Publication 1794-6.5.11 - September 2011

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Overview of the Frequency Input Module

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

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

Chapter 2 Install Your FLEX I/O Frequency Input Module

v Publication 1794-6.5.11 - September 2011

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

Page 6

vi Table of Contents

Configure Your FLEX I/O Module with RSLogix 5000 Software

Troubleshoot the Module

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

Chapter 3

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

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

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

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

Specifications

Electronic Data Sheet (EDS) Files

Schematics

Programming Your Module with PLC Processors

Appendix A

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

Appendix B

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

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

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

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

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

Publication 1794-6.5.11 - September 2011

Index

Page 7

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

Who Should Use This Manual

Purpose of the 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 See

Overview of the Frequency Input Module Chapter 1 Install Your FLEX I/O Frequency Input Module Chapter 2 Configure Your FLEX I/O Module with RSLogix 5000 Software Chapter 3 Read and Write Configuration Maps for the FLEX I/O Module Chapter 4 Troubleshoot the Module Chapter 4 Specifications Appendix A Electronic Data Sheet (EDS) Files Appendix B Schematics Appendix C Program Your Module with PLC Processors Appendix D

About the Vocabulary

ix Publication 1794-6.5.11 - September 2011

In this manual, we refer to:

• the frequency input module as the “input module”

• the Programmable Controller as the “controller”

Page 8

x Preface

Common Techniques Used in this Manual

x xxxxxxxxxxxxx

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.

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.

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Chapter

I/O moduleTerminal base

1794-IRT8

Adapter

45568

Overview of the Frequency Input Module

Overview

The FLEX System

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 Page

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 Output Capabilities 7 How Frequency Is Calculated 8 Chapter Summary 12

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:

• 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

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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 Digital – 2-pt 24V DC input frequency

module, conformally coated.

1794-IJ2XT 24V DC 2 2 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

Publication 1794-6.5.11 - September 2011

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.

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Overview of the Frequency Input Module 3

500/50 mV

50 mV

Select

24V IEC 1+

Magnetic

500/50 mV

Magnetic

Gate input

Frequency input

CRISP

Bus interface

Output 0

Output 1

Inter-processor

communication,

uP system 0/1

From uP system 1

Data To/From FlexBus

Invert

Y/N

Invert

Y/N

Processing

Counter

Frequency / count data

uP system 0

Output control

Input control

Direction data

IEC 1+/Contact

Input

VORTEX

Vortex

3Vin 6Vin 24V power

IEC 1+/Contact

Input

50 mV Select

GND

Inputs

Module

FlexBus

24V Power

24Vpower

45388

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.

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.

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4 Overview of the Frequency Input Module

FREQ

GATE

FREQUENCY INPUT 2 CHANNEL

1794-IJ2

F0F

FREQ

GATE

OUT

45339

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

FlexBus

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

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

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.

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

External devices transmit frequency signals to the module.

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

1794-ACN15 1794-ACNR15 1794-ACNR15K 1794-ADN 1794-AENT 1794-APBDPV1 1794-ASB 1794-APB

Adapter

1794-AENT shown

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

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Overview of the Frequency Input Module 5

Bridge

PanelView Station

Ethernet

PC running controller and Rockwell Automation configuration software

1794 Adapter 1794 FLEX I/O module

FLEX System

45567

ATTENTION

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.

Typical Applications

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.

The following publications provide more information about EtherNet/IP, and ControlNet modules in a Logix5000 system:

•EtherNet/IP Modules in Logix5000 Control Systems, publication E

NET-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

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6 Overview of the Frequency Input Module

Channel 0

Channel 1

Frequency Input (F0) Gate Input (G0)

Frequency Input (F1) Gate Input (G1)

Frequency Input (F0-F1) – you connect your input device to this input (ac, proximity sensors switch, magnetic, vortex )

Gate Input (G0-G1) – you connect your input device to this input (ac, proximity sensors switch, magnetic, vortex )

used to determine direction – CW or CCW

2 input channels

FREQ

GATE

FREQUENCY INPUT 2 CHANNEL

1794-IJ2

Allen-Bradley

F0F

FREQ GATE

1F 1 F

OUT

45557

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:

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Modes of Operation

Overview of the Frequency Input Module 7

Selecting the Modes of Operation

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

Mode Use this mode to Indicators /

Alarms

Frequency and % Full Scale

Frequency and Acceleration •Monitor the frequency of an input with high

•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

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

x x

Scaler / Values

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

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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 Mode Purpose Alarm is ON when

Frequency alarm Frequency alarm

selected

Acceleration alarm Acceleration alarm

selected

Scaling % full scale and

acceleration

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 Frequency > User-specified scaled

Frequency > user-specified value

| Acceleration | > user-specified value

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.

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Overview of the Frequency Input Module 9

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

Frequency reported at end sampling time

Pulses counted

T2 - T1

pulses counted

First pulse in window, T1 time stored

Last pulse in windowT2, update as each

pulse occurs

Minimum sampling time

Frequency input

pulses

45340

45341

Frequency reported at

first pulse in extended Time

2 - 1

T2 - T1

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

Minimum sampling time Frequency input

pulses

2 = pulses counted

First pulse in window, T1 time stored

First pulse after window extended, T2 time stored

Sampling time extended to 2 s

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

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

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10 Overview of the Frequency Input Module

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

pulses to terminate

Minimum sampling time

Frequency input

pulses

First pulse in window,

T1 time stored

T2, update as each pulse occurs

Number of pulses to terminate reached

45342

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

Missing Pulse Multiplier

Publication 1794-6.5.11 - September 2011

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.

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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.

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12 Overview of the Frequency Input Module

45344

Direction Detection – Principle of Operation

Clockwise rotation

Chapter Summary

2 x M

Sensor 0

Sensor 1

Gate input

IJ2 module

Sensor 0 (F)

Sensor 1 (G)

Sensor 0 (F)

Sensor 1 (G)

Frequency input

Clockwise

Rotation

Counter

Clockwise

Rotation

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

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Chapter

ATTENTION

Install Your FLEX I/O Frequency Input Module

Overview

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

Topic Page

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 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 Resolution and Accuracy 24 Examples of Wiring to a 1794-TB3G Terminal Base Unit 27 Chapter Summary 27

Before You Install

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

Your Module

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

• position the keyswitch on the terminal base.

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 Publication 1794-6.5.11 - September 2011

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.

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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.

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

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.

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Install Your FLEX I/O Frequency Input Module 15

45319

45320

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.

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).

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.

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16 Install Your FLEX I/O Frequency Input Module

45321

45322

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.

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

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.

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Install Your FLEX I/O Frequency Input Module 17

45323

Millimeters (inches)

45327

• 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

35.5

(1.4)

Description Description

1 Mounting plate for adapter 3 Terminal base unit (not included) 2 #6 Self-tapping screws 4 Adapter module (not included)

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

58.5 (2.3)

35.5

(1.4)

Millimeters

35.5 (1.4)

(Inches)

21 (0.83)

58.5 (2.3)

35.5 (1.4)

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18 Install Your FLEX I/O Frequency Input Module

IMPORTANT

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.

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.

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Install Your FLEX I/O Frequency Input Module 19

2 3 4

Label here or under here

40231

ATTENTION

Description Description

1 FlexBus connector 5 Base unit 2 Latching mechanism 6 Alignment groove 3 Keyswitch 7 Alignment bar 4 Cap plug 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.

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.

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20 Install Your FLEX I/O Frequency Input Module

IMPORTANT

Daisy-chaining

Individual

Combination

24V DC

Frequency input

module

Digital input

module

Frequency input

module

Analog

module

Digital output

module

Digital input

module

Frequency input

module

Analog module

Frequency input

module

Frequency input

module

Frequency Input

module

Frequency input

module

45556

Wiring when total current draw is 10 A.

Wiring when total current draw is greater than 10 A.

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

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)

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Install Your FLEX I/O Frequency Input Module 21

ATTENTION

0123456789101112131415

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

1794-TB3G or 1794-TB3GK

1794-TB3GS

0...15

34...51

16...33

0123456789101112131415

18 19 20 21 22 23 3324 25 26 27 28 29 30 31 3217

35 36 37 38 47 48 49 5034 51

39 40 41 42 43 44 45 46

Label placed at top of wiring area

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

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

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.

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22 Install Your FLEX I/O Frequency Input Module

ATTENTION

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).

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.

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.

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.

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.

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Install Your FLEX I/O Frequency Input Module 23

ATTENTION

Wiring Connections for the Frequency Input Module

RET

(5)

Channel 1 Terminals

(7)

Power Input

Channel 0 Terminals

Types of Inputs Power Input

Frequency

24V DC IEC1+ Proximity

24V DC Contact Switch

(1) (2)

(3)

500mV AC Magnetic Pickup

50mV AC Magnetic Pickup

7638912

(6)

(4)

7 5 3 8 10 12

53 8 1012

6V AC Vortex 2 1 3 13 14 12 3V AC Vortex 2 0 3 13 15 12

Gate

24V DC IEC1+ Proximity

24V DC Contact Switch

(1) (2)

(3)

24 23 20 25 26 29

500mV AC Magnetic Pickup 24 22 20 25 27 29

(4)

50mV AC Magnetic Pickup

(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 KΩ ).

(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.

24 22 20 25 27 29

RET

(5)

(7)

GND

(5)

Total current draw through the terminal base unit is limited to 10 A. Separate power connections to the terminal base unit may be necessary.

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24 Install Your FLEX I/O Frequency Input Module

+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

For daisychaining: Supply in – C-34 (+) and C-35 (-) Supply out – C-50 (+) and C-51 (-)

45346

Connections for Terminal Base 1794-TB3G shown

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

24V

3V 6V 24V

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

Out 0

Ret

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

RET 50

Pwr

Channel 0 Frequency Input Channel 1 Frequency Input

Channel 0 Gate Input Channel 1 Gate Input

mV Sel

500/50

Pwr

24V

Pwr

24V

Pwr

24V

Pwr

500/50mV50

mV Sel

RETFF

Pwr

3V6V24V

Out 1

Out 1RET G G RET

Ret

Chassis GndChassis Gnd

+V COM +V COM

24V DC

Supply In

Sply 0

Channel 0 Output Supply Channel 1 Output Supply

Gnd

Sply 0

Ret

6 Chassis Ground

for Shields

Sply 1

Gnd

Sply 1

Ret

24V DC

Supply Out

Output Alarm Connections

Output Alarm

Channel 0 Terminals

(1)

Channel 1 Terminals

(1)

Connections

Supply+Supply

RET

Out + Out

RET

Supply+Supply

RET

Out + Out

Supply C-37 C-39 C-46 C-48 Output B-17 B-18 B-31 B-32

(1)

Connect cable shields to GND connections.

RET

Resolution and Accuracy

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

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Install Your FLEX I/O Frequency Input Module 25

% Resolution =

100

Count frequency x minimum frequency sample time

% Accuracy =

100

1 -

Minimum frequency sample time

Minimum

frequency sample

time

count frequency

Resolution % is defined as:

Accuracy % is defined as:

Resolution and Accuracy

Accuracy

Minimum Frequency Sample Time (ms)

Sampling Accuracy

Time Base Accuracy

Worst Case Tota l Accuracy

Deviation in Hz Due to Total Accuracy

1.0…3276.7 Frequency Range (in Hz)

1…32767 Frequency Range (in Hz)

2 0.02% 0.0225% 0.0425 0.1…1.4 1…14 0.01%

Resolution

4 0.01% 0.0225% 0.0325 0.1…1.1 1…11 0.005% 5 0.008% 0.0225% 0.0305 0.1…1.0 1…10 0.004% 10 0.004% 0.0225% 0.0265 0.1…0.9 1…9 0.002% 20 0.002% 0.0225% 0.0245 0.1…0.8 1…8 0.001% 50 0.0008% 0.0225% 0.0233 0.1…0.8 1…8 0.0004% 100 0.0004% 0.0225% 0.0229 0.1…0.8 1…8 0.0002% 200 0.0002% 0.0225% 0.0227 0.1…0.7 1…7 0.0001% 500 0.00008% 0.0225% 0.02258 0.1…0.7 1…7 0.00004% 1000 0.00004% 0.0225% 0.02254 0.1…0.7 1…7 0.00002%

Input Map

Bit 15141312111009080706050403020100 Word Read

0 Frequency 0…32,767 or 0.0…3,276.7 Channel 0 1 % Full Scale 0.0…3,276.7% Channel 0 or Acceleration -32,768…32,767 Channel 0 2 Frequency 0…32,767 or 0.0…3,276.7 Channel 1 3 % Full Scale 0.0…3,276.7% Channel 1 or Acceleration -32,768…32,767 Channel 1 4 R R Direction

Ch 0

GS Ch 0

F/A Ch 0

WO Ch 0

MPA

R R Direction

Ch 0

Ch 1

GS Ch 1

F/A Ch 1

WO Ch 1

MPA Ch 1

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26 Install Your FLEX I/O Frequency Input Module

Input Map

Bit 15141312111009080706050403020100 Word Read

5 Reserved Diagnostic Status

Channel 0

Reserved Diagnostic Status

Channel 1 6 Reserved Where: R = Reserved

GS = Gate state F/A = Frequency/Acceleration alarm WO = Wire-off alarm MPA = Missing pulse alarm

Output Map

Dec 15 141312111009 08 07 060504 03020100 Oct 17 16151413121110 07 060504 03020100

0CFSSMFR

Number of pulses to

Ch0

terminate sampling 0…7 Ch 0

MPM 0…3 Ch 0

RLFFR

Number of pulses to

Ch 1

terminate sampling 0…7 Ch 1

MPM 0…3 Ch 1

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

Absolute Value of Acceleration - 0…32767 Channel 0

2 Frequency Scaling Divisor 0…255 Channel 0 Frequency Scaling Multiplier 0…255

Channel 0

3 WOFG

Ch0

WOFF Ch0

IGI Ch0

IFI Ch0

Minimum Frequency Sample Time 0…15 Ch 0

Init St Up Ch 0

ACT 0…3 Ch 0

F/AA S Ch0

MPDM 0…3 Ch 0

WOFM 0…3 Ch0

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

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

5 Frequency Scaling Divisor 0…255 Channel 1 Frequency Scaling Multiplier 0…255

Channel 1

6 WOFG

Ch1

WOFF Ch1

IGI 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

Publication 1794-6.5.11 - September 2011

IFI Ch 1

Minimum Frequency Sample Time 0…15 Ch 1

Init St Up

ACT 0…3 Ch 1

F/AAS Ch 1

MPDM 0…3 Ch 1

Ch 1

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

WOFM 0…3 Ch 1

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Install Your FLEX I/O Frequency Input Module 27

24V DC IEC 1+ Proximity

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

Standard Magnetic Pickup

500 mV threshold (F0)

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

Power In

Input Device

Magnetic Input Device

Standard Magnetic Pickup

50 mV threshold (F0)

Standard Output (O0)

0123456789101112131415

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

Important: When using a channel for 50 mV sensor, jumper the 50/500 mV pin to the appropriate RET.

Magnetic Input Device

40 41

6V Vortex Flowmeter

External Power Supply #1 10-31.2V DC @ 1A

LOAD 0

Power

24V DC Contact Switch

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

6V Vortex Flowmeter

45347

Examples of Wiring to a 1794-TB3G Terminal Base Unit

Chapter Summary

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.

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28 Install Your FLEX I/O Frequency Input Module

Notes:

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Page 39

Chapter

ATTENTION

Configure Your FLEX I/O Module with RSLogix 5000 Software

Overview

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.

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.

Add and Configure the

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

FLEX I/O Module

29 Publication 1794-6.5.11 - September 2011

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

Right-click the local communication module.

Select New Module.

1. Select New Module for the I/O Configuration.

2. The Select Module dialog appears.

Publication 1794-6.5.11 - September 2011

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

3. The New Module dialog appears.

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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

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

6. On the Configuration tab, specify the following:

• Channel

• Frequency or Acceleration

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

Publication 1794-6.5.11 - September 2011

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.

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

Configuration Parameters

Module Property Configuration Options

Maximum Frequency 0 Hz (default) Frequency Range 1…32767

1.0…3276.7 Minimum Frequency Sample Time 2…100 Acceleration Calculation Time Rolling Average

8 16 32

Missing Pulse Multiplier None

2 8 32

Pulses to Terminate Sampling Minimum Frequency Sample Time

2 4 8 16 32

Wire-off/Missing Pulse Fault Select Mode

Disabled Alarm Only Alarm/Maximum Frequency Alarm/Minimum Frequency

Chapter Summary

You should now see the 1794-IJ2 module added to your I/O Configuration tree.

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.

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

Notes:

Publication 1794-6.5.11 - September 2011

Page 45

Chapter

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

Overview

Configure Your Frequency Input Module

This chapter describes how to configure, read data from, and map data to your Frequency Input module.

Topic Page

Configure Your Frequency Input Module 35 Read Data From Your Module 35 Map Data for the Module 36 Frequency Input Module Image Table Mapping 36 Chapter Summary 49

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

35 Publication 1794-6.5.11 - September 2011

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.

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

Module Image

I/O Image

Frequency Channel 0

% Full Scale or Acceleration Channel 0

Diagnostics

Input size

Output size

0...7 Words

1...6 Words

Frequency Channel 1

% Full Scale or Acceleration Channel 1

GS1F/A1WO1MPA

DIR

GS0F/A0WO0MPA

DIR

RRR

Reserved

MPM

NOPTS

MPM

NOPTS

SSMCF

Minimum Freq or Absolute Value of Acceleration Channel 0

Frequency Scaling Divisor Channel 0

Frequency Scaling Multiplier Channel 0

F/A

AS0

WOFM

UP0

MPDM

MFST

ACT 0

IFI

IGI

WOFF

WOFG

Minimum Freq or Absolute Value of Acceleration Channel 1

Frequency Scaling Divisor Channel 1

Frequency Scaling Multiplier Channel 1

F/A

AS1

WOFM

UP1

MPDM

MFST

ACT 1

IFI

IGI

WOFF

WOFG

45351

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

Block Transfer Read Word Assignments

(Octal Bit) 17 16 15 14 13 12 11 10 07 06 05 04 03 02 01 00 Decimal Bit15141312111009080706050403020100

0 Frequency 0…32,767 or 0.0…3,276.7 Channel 0 1 % Full Scale 0.0%…3,276.7% Channel 0 or Acceleration -32,768…+32,767 Channel 0 2 Frequency 0…32,767 or 0.0…3,276.7 Channel 1 3 % Full Scale 0.0%…3,276.7% Channel 1 or Acceleration -32,768…+32,767 Channel 1

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

Block Transfer Read Word Assignments

(Octal Bit) 17 16 15 14 13 12 11 10 07 06 05 04 03 02 01 00 Decimal Bit15141312111009080706050403020100

4 R R Direction

Ch 0

GS Ch 0

F/A Ch 0

WO Ch 0

MPA

R R Direction

Ch 0

Ch 1

GS Ch 1

F/A Ch 1

WO Ch 1

MPA

Ch 1 5 Reserved Diagnostic Status Where: R = Reserved

GS = Gate state F/A = Frequency/Acceleration alarm WO = Wire-off alarm MPA = Missing pulse alarm

Bit/Word Definitions for Block Transfer Read Words

Word Bit Definition

Read Word 0

Bit 00…15 (00…17)

Word 1 Bit 00…15

(00…17)

Word 2 Bit 00…15

(00…17)

Word 3 Bit 00…15

(00…17)

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.

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

Bit/Word Definitions for Block Transfer Read Words

Word Bit Definition

Word 4 Bits 00 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.

Bit 01 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 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.

Bit 03 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

Bit 09 (11) 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.

Bit 10 (12) Frequency or Acceleration Alarm (channel 0) – Changes state from 0…1 if the calculated Frequency (actual

Bit 11 (13) 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.

Bits 12…13 (14…15)

Direction (channel 0) – 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 14…15

Not used

(16…17)

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

Bit/Word Definitions for Block Transfer Read Words

Word Bit Definition

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

0 0 0 0 0 = Normal Operation (No Failure) 0 0 0 1 1 = Calibration Failure 0 0 1 0 2 = Configuration Failure

A Minimum Frequency Sample Time value other than 0…9

was selected. 0 0 1 1 3 = Message Failure 0 1 0 0 4 = Lead Break Detection Hardware Failure 0 1 0 1 5 = Major Hardware Failure 0 1 1 0 6 = EEPROM Failure 0 1 1 1 7 = RAM Failure 1 0 0 0 8 = ROM Failure 1 0 0 1 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%. 1010…1111 10…15 = Not Used

Bits 04…15

Reserved

(04…17)

Block Transfer Write Word Assignments

(Octal Bit) 17 16 15 14 13 12 11 10 07 06 05 04 03 02 01 00 Dec. Bit 15 14 13121110090807060504 03020100

0 CF SSM FR

Ch 0

Number Of Pulses To Terminate Sampling Ch 0

MPM Ch 0

RLFFR

Ch 1

Number Of Pulses To Terminate Sampling Ch 1

MPM Ch 1

1 Maximum Frequency 0…32,767 or 0.0…3,276.7 or Absolute Value of Acceleration 0…32,767 – Channel 0 2 Frequency Scaling Divisor 0…255 Ch 0 Frequency Scaling Multiplier 0…255 Ch 0 3WOFG

Ch 0

WOFF Ch 0

IGI Ch 0

IFI

Minimum Frequency

Ch 0

Sample Time Ch 0

ACT Ch 0 F/A AS

Init St Up

Ch 0

MPDM Ch 0

WOFM Ch 0

Ch 0

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

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

Block Transfer Write Word Assignments

(Octal Bit) 17 16 15 14 13 12 11 10 07 06 05 04 03 02 01 00 Dec. Bit 15 14 13121110090807060504 03020100

5 Frequency Scaling Divisor 0…255 Ch 1 Frequency Scaling Multiplier 0…255 Ch 1 6WOFG

Ch 1

WOFF Ch 1

IGI Ch 1

IFI

Minimum Frequency

Ch 1

Sample Time Ch 1

ACT Ch 1 F/A AS

Init St Up

Ch 1

MPDM Ch 1

WOFM Ch 1

Ch 1

Where: CF = Communication fault

SSM = Safe state mode FR = Frequency Range Ch = Channel MPM = Missing Pulse Multiplier R = Reserved LF = Local fault mode

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

WOFF = Wire-off fault frequency

Bit/Word Definitions for the Block Transfer Write Words

Word Bit

Definition

Write Word 0 Bits 00…01 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.

Default = No multiplier; alarm generated immediately Bit 01 00 Missing Pulse Multiplier

0 0 No Multiplier, normal mode with 2 s delay 01X2 10X8 11X32

Bits 02…04 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 Use minimum frequency sampling time 0012 0104 0118 10016 10132 11064 1 1 1 128

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Bit/Word Definitions for the Block Transfer Write Words

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

Word Bit

Word 0

Bits 05 Frequency range bits (channel 1) – Specifies the Frequency Range of the Frequency

(con’t.)

Bits 06 Local fault mode selection – determines how the Module Safe State data is used to

Bits 07 Not used Bits 08…09

(10…11)

Bits 10…12 (12…14)

Definition

input.

0 = 1…32767 (below 1 Hz reports 0); 1 = 1.0…3276.7 (below 1.0 Hz reports 0.0). Default = 0

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

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.

Default = No multiplier; alarm generated immediately Bit 09

Minimum frequency sampling time

(11)08(10) 0 0 No Multiplier, alarm generated immediately (normal mode

with 2 s delay) 01X2 10X8 1 1 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

Number of pulses to terminate sampling

(14)11(13)10(12) 0 0 0 Use minimum frequency sampling time 0012 0104 0118 10016 10132 11064 1 1 1 128

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

Bit/Word Definitions for the Block Transfer Write Words

Word Bit

Definition

Bit 13 (15) Frequency range bits (channel 0) – Specifies the Frequency Range of the Frequency

input.

0 = 1…32767 (below 1 Hz reports 0); 1 = 1.0…3276.7 (below 1.0 Hz reports 0.0). Default = 0

Bit 14 (16) 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)

Bit 15 (17) 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

Word 1 Bits 00…15

(00…17)

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.

Word 2 Bits 00…07 Frequency scaling multiplier (channel 0) – 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 0) – Specifies divisor to scale the incoming Frequency

value, 0…255.

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

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Bit/Word Definitions for the Block Transfer Write Words

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

Word Bit

Definition

Word 3 Bits 00…01 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 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).

Bits 02…03 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.

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

Bit 04 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

Bits 05…06 Acceleration Calculation Time (channel 0) – 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) 018 1016 1132

Bit 07 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

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

Bit/Word Definitions for the Block Transfer Write Words

Word Bit

Definition

Word 3 Bit 07 Minimum Frequency Sampling Time (channel 0) – Specifies the minimum time (in ms)

the module spends collecting pulses to determine the Frequency.

Bits 08…11 (10…13)

Bit 11

(13)10(12)09(11)08(10)

Minimum Frequency Sampling Time (in ms)

0000 2 0001 4 0010 5 0011 10 0100 20 0101 50 0 1 1 0 100 0 1 1 1 200 1 0 0 0 500 1 0 0 1 1000 1010…1111 not used – 2 ms default sample time used

Bit 12 (14) 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.

0 = Normal (Active High, 24V = On), 1 = Invert input (Active Low, 0V = On). Default = 0 – Normal (Active High, 24V = On)

Bit 13 (15) 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)

Bit 14 (16) 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

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.

Bit 15 (17) 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.

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Bit/Word Definitions for the Block Transfer Write Words

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

Word Bit

Word 4 Bits 00…15

(00…17)

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.

Word 5 Bits 00…07 Frequency scaling multiplier (channel 1) – Specifies a multiplier to scale the incoming

Frequency value, 0…255.

Default = 0 – no scaling multiplication performed (x1)

Bits 08…15 (10…17)

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

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

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

Bit/Word Definitions for the Block Transfer Write Words

Word Bit

Definition

Word 6 Bits 00…01 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).

Bits 02…03 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.)

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

Bit 04 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.

Bits 05…06 Acceleration Calculation Time (channel 1) – Specifies the number of Frequency Sample

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0 = Frequency alarm 1 = Acceleration alarm Default = 0 – frequency alarm

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) 018 1016 1132

Page 57

Bit/Word Definitions for the Block Transfer Write Words

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

Word Bit

Definition

Word 6 Bit 07 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.

0 = Normal run mode, 1 = Startup Mode – Defeat/delay Missing Pulse Alarm Default = 0 – Normal run mode

Bits 08…11 (10…13)

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)

0000 2 0001 4 0010 5 0011 10 0100 20 0101 50 0 1 1 0 100 0 1 1 1 200 1 0 0 0 500 1 0 0 1 1000

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

Bit 12 (14) Invert Select – Frequency Input (channel 1) – Selects whether to invert the Frequency

0 = Normal (Active High, 24V = On), 1 = Invert input (Active Low, 0V = On). Default = 0 – Normal (Active High, 24V = On)

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

Bit/Word Definitions for the Block Transfer Write Words

Word Bit

Definition

Word 6 Bit 13 (15) 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.

0 = Normal (Active High, 24V = On), 1 = Invert input (Active Low, 0V = On) Default = 0 – Normal (Active High, 24V = On)

Bit 14 (16) 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

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.

Bit 15 (17) 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

Bit 15141312111009080706050403020100 Word Read

Ch 0

5 Reserved Diagnostic Status

F/A

Ch 0

Channel 0

WO Ch 0

MPA

R R Direction

Ch 0

Ch 1

GS Ch 1

Reserved Diagnostic Status

Channel 1

F/A Ch 1

WO Ch 1

MPA Ch 1

6 Reserved Where: R = Reserved

GS = Gate state F/A = Frequency/Acceleration alarm WO = Wire-off alarm MPA = Missing pulse alarm

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

Output Map

Dec 15 141312111009 08 07 060504 03020100 Oct 17 161514131211 10 07 060504 03020100

0 CF SSM FR

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

Absolute Value of Acceleration - 0…32767 Channel 0

2 Frequency Scaling Divisor 0…255 Channel 0 Frequency Scaling Multiplier 0…255

3WOFG

Ch0

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

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

5 Frequency Scaling Divisor 0…255 Channel 1 Frequency Scaling Multiplier 0…255

6WOFG

Ch1

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 Ch0

WOFF Ch1

Number of pulses to

Ch0

terminate sampling 0…7 Ch 0

IGI

IFI

Ch0

IGI

IFI

Ch 1

Minimum Frequency Sample Time 0…15 Ch 0

Minimum Frequency Sample Time 0…15 Ch 1

MPM 0…3 Ch 0

RLFFR

Channel 0 Init St

Up Ch 0

Channel 1 Init St

Up Ch 1

ACT 0…3 Ch 0

ACT 0…3 Ch 1

Number of pulses to

Ch 1

terminate sampling 0…7 Ch 1

F/AA S Ch0

F/AAS Ch 1

MPDM 0…3 Ch 0

MPDM 0…3 Ch 1

MPM 0…3 Ch 1

WOFM 0…3 Ch0

WOFM 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.

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

Notes:

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Troubleshoot the Module

Chapter

Overview

Status Indicators

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

Topic Page

Status Indicators 35 Diagnostics 36 Diagnostic Bits in Word 5 of the BTR File 37

The module has indicators for the following:

• Frequency and Gate Inputs

• Frequency and Gate Wire-Off Faults

•Alarm Outputs

1794-IJ2

FREQUENCY INPUT 2 CHANNEL

FREQ GATE

F0F

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

FREQ GATE

1F 1F

A B C

OUT

45348

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.

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36 Troubleshoot the Module

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 Condition Operating Description

Input (0, 1) Off (Dark) Input Turned Off, Input Not Used, or

Wire Disconnected

Diagnostics

(Freq. or Gate) On (Yellow) Input Turned On

(Active High or Active Low if Inverted)

Fault (F) Off (Dark) Wire connected, normal operation or

detection disabled

(Freq. or Gate) On (Red

Flashing)

Output Alarm (0, 1)

Status (OK) Off (Dark) 24V Power Turned Off,

Off (Dark) Output alarm turned off On (Yellow) Output alarm turned on (Logic Drive On)

Solid Green Module OK, Normal Operating Mode Solid Red Module Fault, Outputs Disabled

Wire disconnected, fault condition (for IEC1 + Proximity switch or switch contacts with shunt resistor)

or 5V Logic Power Problem

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.

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Troubleshoot the Module 37

45375

See table, Diagnostic Bits in Word 5, for diagnostics

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

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 1 1 = Calibration failure 0 0 1 0 2 = Configuration failure – a Minimum Frequency

Sample Time value other than 0…9 was selected

Chapter Summary

0 0 1 1 3 = Message failure 0 1 0 0 4 = Lead break detection hardware failure 0 1 0 1 5 = Major hardware failure 0 1 1 0 6 = EEPROM failure 0 1 1 1 7 = RAM failure 1 0 0 0 8 = ROM failure 1 0 0 1 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%.

1010…1111 10…15 = Not used

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.

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38 Troubleshoot the Module

Notes:

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Specifications

Appendix

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 Input frequency, max 32 kHz Frequency value, max 32,767 Hz or 3,276.7 Hz (dependent on range) Input pulse width 20 μs Resolution and accuracy See table, Resolution and Accuracy On-state voltage, min 10V (24V IEC+1 proximity, encoder input or switch inputs) On-state voltage, nom

(selected by terminal base connections)

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

2 – Frequency and Gate (gate used to establish direction)

, on page 24

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

On-state current

min nom

max Off-state current <1.5mA into 24V DC IEC+ terminal Off-state voltage, max 5.0V DC on 24V DC IEC+1 terminal Wire-off detection 0.4 mA for proximity, encoder or contact switch with

Frequency input impedance >5 KΩ for 50 mV Extended magnetic pickup

Gate input impedance >5 KΩ for 50 mV Extended magnetic pickup

55 Publication 1794-6.5.11 - September 2011

2.0 mA

9.0 mA

10.0 mA

50 kΩ shunt resistor

>5 KΩ for 500 mV Magnetic pickup >10 KΩ for 3V Vortex flowmeter low range >10 KΩ for 6V Vortex flowmeter high range >2.5 KΩ for 24V DC IEC+1 proximity or encoder input >2.5 KΩ for 24V DC Contact switch input

>5 KΩ for 500 mV Magnetic pickup >2.5 KΩ for 24V DC IEC+1 proximity or encoder input >2.5 KΩ for 24V DC Contact switch input

Page 66

56 Specifications

Output Specifications

(1)

Attribute Value

Number of outputs 2 – isolated Output voltage source Customer supplied Output voltage

min nom max

10V DC 24V DC

31.2V DC On-state current, min 1 mA per output On-state current, max 1.0 A per channel sourced out of module

Current Limited – All outputs can be On simultaneously without derating

Surge current 2 A for 50 ms, repeatable every 2 s Off-state leakage, max Less than 300 μA @ 31.2V DC On-state voltage drop 0.9V DC @ 1 A Output control Outputs individually assignable to:

Frequency, % Full scale or acceleration alarm

Output switching time 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 Value

Module location Cat. No. 1794-TB3G and 1794-TB3GS terminal base units External DC power

Voltage range Supply voltage, nom Supply current

(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

Isolated DC power Voltage range Supply voltage, nom Supply current, max Peak AC ripple, max

(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

Dimensions (with module installed in base) HxWxD

94 x 94 x 69 mm (3.7 x 3.7 x 2.7 in.)

Isolation voltage 50V (continuous), Basic Insulation Type

Type tested @ 1365V AC for 60 s, between field side

and system and individual channels Processing time <4 ms FlexBus current 30 mA @ 5V DC

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Specifications 57

General Specifications

Attribute Value

Power dissipation, max 4.6W @ 31.2V DC Thermal dissipation, max 15.6 BTU/hr @ 31.2V DC Indicators (field side driven,

logic side indication)

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 Keyswitch position 1 Wire size Determined by installed terminal base

Wiring category

(1)

2 – on signal ports

3 – on power ports Wire type Shielded on signal ports Terminal screw torque Determined by installed terminal base Enclosure type rating None (open-style) North American temp code T4A IEC temp code 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 IEC 60068-2-30 (Test Db, Unpackaged Damp Heat):

5…95% noncondensing

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

5 g @ 10…500 Hz

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

30 g

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

50 g

Emissions CISPR 11:

Group 1, Class A (with appropriate enclosure)

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58 Specifications

Environmental Specifications

Attribute Value

ESD immunity 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 IEC 61000-4-4:

±2 kV @ 5 kHz on power ports ±2 kV @ 5 kHz on shielded signal ports

Surge transient immunity

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

Value

(1)

c-UL-us UL Listed Industrial Control Equipment, certified for US and

Canada. See UL File E65584.

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 (1794-IJ2, 1794-IJ2K)

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.

CE 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)

C-Tick Australian Radiocommunications Act, compliant with:

AS/NZS CISPR 11; Industrial Emissions

Ex 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)

Publication 1794-6.5.11 - September 2011

TÜV 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.

Page 69

Appendix

Electronic Data Sheet (EDS) Files

Overview

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 Version 2.21 RSLinx Version 1.10.176 RSLogix 5 Version 4.0 RSLogix 5000 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.

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60 Electronic Data Sheet (EDS) Files

ATTENTION

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.

•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.

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Schematics

Appendix

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 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).

, when wiring

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).

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62 Schematics

IEC 1+ or

24V DC

Switch input

50/500 mV

Input

6V Vortex

input

3V Vortex

input

50 mV Select

jumper

Internal 500 mV

Ref. Voltage

Return

Lead breakage

Reference voltage

Isolated 24V power

Invert frequency

(Gate) input

Ex Nor

Frequency lead break

(Gate lead break)

Frequency input

(Gate input)

(F and G,

15 mA each)

Frequency only, not on gate

2.15 KW 2.15 KW

2.5 KW

100pF

24V

215 W

47 pF

100 pF

825 W

8.25 KW

100 KW

46.4 KW

8.25 KW

5.11 KW

10 KW

100 pF

10 KW

100 pF

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.

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Schematics 63

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.

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.

45355

24V DC from

terminal base

DC/DC

converter

Channel 0

current limit

Channel 1

current limit

Frequency 0

Gate 0

15 mA

30 mA

max

Frequency 1

Gate 1

15 mA

30 mA

max

To customer devices

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).

45356

Output channel

Supply

10 KW

3.83 KW

6.8V

Output TEMPFET

Output 0

RT1

Supply return

DC to DC Converters – 24V DC Power Supplies

Alarm

10-31.2V

load

1A max

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.

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64 Schematics

Notes:

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Appendix

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.

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66 Program Your Module with PLC Processors

IMPORTANT

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.

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.

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Program Your Module with PLC Processors 67

IJ2 BTR

Error Bit

B17:0

BTR

BLOCK TRANSFER READ Rack Group Slot

Data File

3 2 0

N18:101

Length

Control

B17:0

BTW

BLOCK TRANSFER WRITE Rack

Group Slot

Data

3 2 0

N18:1

Length

Control

B17:0

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

IJ2 BTR/BTW

Control Block

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 BTR

Error Bit

B17:0

IJ2 BTW

Done Bit

IJ2 BTR/BTW

Control Block

B17:0

IJ2 BTW

Error Bit

IJ2 BTW

Error Bit

PLC-3 Processor Program Example

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.

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68 Program Your Module with PLC Processors

BTR

BLOCK TRANSFER READ Rack Group Slot Control

2 0

N22:200

Data File Length

Continuous

N22:101

0 N

ENBLOCK TRANSFER WRITE Rack Group Slot Control

2 0

N22:205

Data File Length Continuous

N22:1

0 N

N22:200

N22:205

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 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.

N22:205

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 number from 0 to 8. In enhanced PLC-5 processors, the block transfer data type may be used as a control file.

IJ2 BTR

Enable Bit

IJ2 BTW

Enable Bit

IJ2 BTR

Control File

IJ2 BTR

Enable Bit

IJ2 BTW

Enable Bit

IJ2 BTW

Control File

PLC-5 Processor Program Example

BTW

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.

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Program Your Module with PLC Processors 69

BTR

BLOCK TRANSFER READ Rack Group Slot

Control Block

1 0

BR141:0

Data File BT Length

Continuous

2BTD5:101

BTW

BLOCK TRANSFER WRITE

Rack Group Slot Control Block

1 0

BW141:0

Data File BT Length Continuous

2BTD5:1

BR141:0

BW141:0

Rung 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.

BW141:0

Rung 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. Valid BTW lengths can be any number between 0 and 8.

IJ2 BTR

Enable Bit

IJ2 BTW

Enable Bit

IJ2 BTR

Control File

IJ2 BTR

Enable Bit

IJ2 BTW

Enable Bit

IJ2 BTW

Control File

BT Ti

BT Timeout 4

PLC-5/250 Processor

Program Example

45565

meout

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70 Program Your Module with PLC Processors

Notes:

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Index

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

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

application 7, 8

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, 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

cable shields 23 cabling

length 22 power 22

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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

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

dimensions

drilling 17

DIN rail 15, 16 direction detection 11

low to high transition 11

drilling 17

EEPROM

failure 39, 53

Ethernet 29

failure

calculation 53 calibration 53 configuration 53 EEPROM 53 hardware 53 message 53 RAM 53 ROM 53

fault

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

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Index 73

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

gate input

low to high transition 11

gate state 26 GND connection 24

hardware

failure 53 major failure 39, 53

hazardous location 19

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

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

jumper 23

keyswitch 13, 18

ladder program 4 lead break 48, 53 local fault mode 41 location

hazardous 19

Logix system 5

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

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74 Index

MSG instructions 5

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

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

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

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

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

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Index 75

indicator 52

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

vortex flowmeter 6

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

zero frequency 9

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76 Index

Notes:

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Publication 1794-6.5.11 - September 2011 77

Rockwell Automation Allen-Bradley 1794-IJ2XT, Allen-Bradley 1794-IJ2K, Allen-Bradley 1794-IJ2 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Important User Information

Summary of Changes

New and Updated Information

Table of Contents

Preface

Who Should Use This Manual

Purpose of the Manual

About the Vocabulary

Related Documentation

Common Techniques Used in this Manual

Overview

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

Selecting the Modes of Operation

Output Capabilities

Implementing Application Features

How Frequency Is Calculated

Frequency Calculation

Termination on Number of Pulses

Missing Pulse Multiplier

Direction Detection

Chapter Summary

Overview

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

Wiring the Terminal Base Units (1794-TB3G shown)

Wire the Terminal Base Units

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

Overview

Chapter Summary

Overview

Configure Your Frequency Input Module

Read Data From Your Module

Map Data for the Module

Frequency Input Module Image Table Mapping

Chapter Summary

Overview

Status Indicators

Diagnostics

Diagnostic Bits in Word 5 of the BTR File

Chapter Summary

What This Appendix Contains

Overview

Updating EDS File

EDS Installation

What This Appendix Contains

Gate Inputs

Output Circuits

Digital Outputs

DC to DC Converters – 24V DC Power Supplies

Overview

Enter Block Transfer Instructions

PLC-2 Family Processor

PLC-3 Family Processor

PLC-5 Family Processor

PLC-5/250 Family Processor

Index