Rockwell Automation 1771-CFM, D17716.5.99 User Manual

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AllenBradley

Configurable Flowmeter Module

(1771CFM/B)

User Manual

Important User Information

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

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

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

Application, Installation, and Maintenance of Solid-State Control

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

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

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

ATTENTION: Identifies information about practices or circumstances that can lead to personal injury or

Attention statements help you to:

death, property damage or economic loss.

• identify a hazard

• avoid the hazard

• recognize the consequences

Important: Identifies information that is critical for successful

application and understanding of the product.

ControlNet is a trademark; PLC is a registered trademark of Allen-Bradley Company, Inc.

Important User Information -1. . . . . . . . . . . . . . . . . . . . . . . .

Using This Manual P-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

What's In This Manual P-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

New/Updated Abbreviations P-2 Related Related Products P-3 Get Started P-4

Overview of the CFM Module 1-1. . . . . . . . . . . . . . . . . . . . . . .

What This Chapter Contains 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . .

How You Use the CFM Module 1-1 What's What the CFM Module Does 1-2 Typical Input

Capabilities Selecting the Mode(s) of Operation 1-5 Using a Prover 1-6 Storing Current Count Values 1-6

Output

Implementing Application Features 1-8

What's

Information

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Documentation

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Applications

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Capabilities

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P-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

P-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Install the CFM Module 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . .

What This Chapter Contains 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Understand Compliance to European Union Directive 2-2

EMC Directive 2-2 Low V

oltage Directive Calculate Power Requirements 2-3 Set the Configuration Jumpers 2-3

Check the Module Operation Jumper 2-3

Set the Input Channel Jumpers 2-4 Determine Key the Backplane Connector 2-6 Install the CFM Module 2-7 Make Connections to the Field Wiring Arm 2-8

Wiring Examples 2-9 What's

CFM Module Placement

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2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-6. . . . . . . . . . . . . . . . . . . . . . .

2-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table of Contentsii

Edit Your Ladder Logic Program 3-1. . . . . . . . . . . . . . . . . . . .

What This Chapter Contains 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Enter Block Transfer Instructions 3-1

PLC2 Family Processor 3-2 PLC3 Family Processor 3-3 PLC5 Family Processor 3-4 PLC5/250 Processor 3-5

What's

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3-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Configure the CFM Module 4-1. . . . . . . . . . . . . . . . . . . . . . . .

What This Chapter Contains 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Understand

BTW Configuration Block 4-2

Select the Mode(s) of Operation 4-8

Totalizer and Nonresettable Totalizer Modes 4-8

Highresolution Frequency Mode 4-11

Direction Sensor Mode 4-14

Configure the Module 4-16

Using Setting Bits in the BTW Configuration Block 4-16

What's

the CFM Module'

BTW Word Description Key 4-2 BTW Word Descriptions 4-3

Counting 4-8 Frequency Storing Count Value 4-10

Frequency

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Sampling

I/O Configuration Software

s BTW Structure 4-1. . . . . . . . . . . . . . .

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4-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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4-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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4-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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4-16. . . . . . . . . . . . . . . . . . . . . . .

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4-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Interpret Module Status and Input Data 5-1. . . . . . . . . . . . . . .

What This Chapter Contains 5-1. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Understand

BTR Word Description Key 5-2 BTR Word Descriptions 5-3

What's

the CFM Module'

s BTR Structure 5-1. . . . . . . . . . . . . . . .

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5-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Troubleshoot the CFM Module 6-1. . . . . . . . . . . . . . . . . . . . . .

What This Chapter Contains 6-1. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Status Indicators 6-1 Diagnostics 6-2

Diagnostic Words in the BTR File 6-2

What's

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6-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table of Contents iii

Specifications A-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

What This Appendix Contains A-1. . . . . . . . . . . . . . . . . . . . . . . . . . .

Frequency Accuracy A-1 General

Specifications

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A-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Schematics B-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

What This Appendix Contains B-1. . . . . . . . . . . . . . . . . . . . . . . . . . .

Input

Circuits Flowmeter Gate

Output

Discrete DC to DC Converters (24V dc power supplies) B-4

Inputs

Circuits

Outputs

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B-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

B-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

B-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

B-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

B-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Replace Your QRC Module C-1. . . . . . . . . . . . . . . . . . . . . . . . .

What This Appendix Contains C-1. . . . . . . . . . . . . . . . . . . . . . . . . . .

What the CFM Module Does C-1 Check Power Requirements C-1 Remove Your QRC Module C-2 Set the Configuration Jumpers C-3

Set the Module Operation Jumper C-3 Check the Input Channel Jumpers C-4

Install

the CFM Module

Make Connections to the New Wiring Arm C-6

Wiring Example C-7

Resume Normal Operation C-8

Edit Your Ladder Logic Program C-8 Read Data From the CFM Module C-9

BTR Word Descriptions C-9 Interpret Status Indicators C-10 Additional Feature C-10

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C-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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Replace Your QRD Module D-1. . . . . . . . . . . . . . . . . . . . . . . . .

What This Appendix Contains D-1. . . . . . . . . . . . . . . . . . . . . . . . . . .

What the CFM Module Does D-1 Check Power Requirements D-2 Remove Your QRD Module D-2 Set the Configuration Jumpers D-3

Set the Module Operation Jumper D-3 Check the Input Channel Jumpers D-4

Install

the CFM Module

Make Connections to the New Wiring Arm D-6

Wiring Examples D-7

Resume Normal Operation D-8

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D-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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Table of Contentsiv

Edit Your Ladder Logic Program D-8. . . . . . . . . . . . . . . . . . . . . . .

Read Data From the CFM Module D-9

BTR Word Description Key D-9 BTR Word Descriptions D-10

Reset Total and Overflow Flags D-10

BTW Word Description D-10 Interpret Status Indicators D-11 Additional Feature D-11

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Using I/O Configuration Software E-1. . . . . . . . . . . . . . . . . . .

What This Appendix Contains E-1. . . . . . . . . . . . . . . . . . . . . . . . . . .

Configure

the CFM Module Block Transfer Data Screen E-1 Channel Setup Screen E-2 Output Setup Screen E-5 Monitor Screen E-6

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E-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Using This Manual

Preface

What's In This Manual

Use this manual to install, program and troubleshoot your Configurable Flowmeter module (1771-CFM/B).

Important: We assume that you know how to program and operate



an Allen-Bradley PLC

processor. If you do not, see the appropriate programming and operations manual for the PLC processor you are using, before you attempt to use this manual.

To Read chapter

Understand the CFM module

Install the CFM module

Edit your ladder logic to contain block transfer instructions for the CFM module

Configure the CFM module

Read data from your module

Interpret status indicators and diagnostic codes

Specifications

Schematics

Using the CFM module as a replacement for the QRC module

Using the CFM module as a replacement for the QRD module

Using I/O Configuration software

See appendixFor reference on

Publication 17716.5.99  December 1995

Using This ManualP–2

New/Updated Information

Abbreviations

The1771-CFM/B is marked with the

logo, indicating that this version complies with the European Union Directives. Technical additions and corrections are marked with change bars.

To comply with the European Union Directives, this information in the manual has been updated:

Updated information On page(s)

European Union Directives compliance CFM module field wiring arm connections 2-8 CFM module wiring examples 2-9 General specifications A-1 CFM (QRC) module wiring arm connections C-6 CFM (QRD) module wiring arm connections D-6, D-7

We refer to As

Configurable Flowmeter module (1771CFM/B)

Configurable Flowmeter module emulating a 1771QRC module CFM (QRC) module

Configurable Flowmeter module emulating a 1771QRD module CFM (QRD) module

AllenBradley programmable logic controllers PLC processors

1771QRD Pulse Flowmeter module QRD module

Bulletin 1771 Dual Ratemeter module (1771QRC) QRC module

2-2

CFM module

Publication

17716.5.99  December 1995

Using This Manual P–3

Related Products

Document Publication number

Configurable Flowmeter Module Product Data 17712.226

PLC2 Programming Software Documentation Set (D6200L06)

PLC2 Programming Software Programming Manual

PLC3 Programming Software Documentation Set (D6200L07)

PLC3 Programming Software Programming Manual

PLC5 Programming Software Documentation Set (6200N8.001)

PLC5 Programming Software I/O Configuration Manual

PLC5/250 Programming Software Documentation Set (6200N8.002)

PLC5/250 Programming Software Programming Manual

SCADA Custom Application Routines (CARs) for Gas and Liquid Petroleum Flow Calculations Product Profile

PLC5 Volume Flow CARs for Orifice Metering User Manual 62006.5.17

PLC5 Volumetric Flow CARs for Turbine and Displacement Metering User Manual

62006.4.14

62006.4.17

62006.4.12

50006.4.8

62001.22

62006.5.18

See the Automation Group Publication Index (publication SD499) for additional publications with information on PLC processors.

You can install the CFM module in any system that uses PLC processors with block-transfer capability and the 1771 I/O structure. Contact your local Allen-Bradley representative for more information about our PLC processors.

Publication

17716.5.99  December 1995

Using This ManualP–4

Get Started

Start

Overview of the CFM Module

Using

CFM module

as replacement for

QRC module?

Using CFM module

as replacement for

QRD module?

Use this diagram to help you get started.

Replace Y

our

QRC Module

Replace Y

our

QRD Module

Complete

Install the CFM Module

Edit Y

our Ladder Logic Program

Configure the CFM Module

4 5 6

Interpret Module Status and Input Data

roubleshoot

the CFM Module

Complete

Publication

17716.5.99  December 1995

Chapter

Overview of the CFM Module

What This Chapter Contains

How You Use the CFM Module

Make sure the module operation jumper is set in the CFM position.

Read this chapter to familiarize yourself with the CFM module.

For information on See page

How You Use the CFM Module . . . . . . . . . . . . . . . . . . . . . . . 1-1

What's Next . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

What the CFM Module Does . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Typical Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Input Capabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Selecting the Mode(s) of Operation . . . . . . . . . . . . . . . . . 1-5

Using a Prover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

Storing Current Count Values . . . . . . . . . . . . . . . . . . . . . 1-6

Output Capabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

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

1-8

The CFM module is designed to operate in one of three ways:

as a replacement for a QRC module

Set the module operation jumper in the QRC position.

as a replacement for a QRD moduleas a CFM module

Set the module operation jumper in the QRD position.

Wire input and outputs to swing arm (1771WN).

Install the CFM module.

Edit your ladder logic to contain BTW and BTR instructions for the CFM module.

Edit CFM module's BTW configuration block and send configuration BTW to the CFM module.

Wire inputs to the new swing arm (1771WN).

Replace the QRC module with the CFM module.

Continue to program BTRs as before (no changes to ladder logic).

Important: If you use the CFM module as a replacement for a QRC or QRD module,

the CFM module operates like a QRC or QRD module. You do not use any of the CFM module's features; therefore, you cannot configure outputs to any of the four input channels.

Wire inputs to the new swing arm (1771WN).

Replace the QRD module with the CFM module.

Continue to program BTWs and BTRs as before (no changes to ladder logic).

Publication

17716.5.99 - December 1995

1–2 Overview of the CFM Module

What's Next

The rest of this chapter contains information on CFM module operation.

Using the

CFM module

as a replacement for

a QRC module?

Using the

CFM module

as replacement for

a QRD module?

What the CFM Module Does

Data T

able

User Program

❻ Your ladder program can use or

move the data before it is written over by the transfer of new data in a subsequent transfer.

The CFM module interfaces with these PLC processors:

• PLC2 processor family

• PLC3 processor family



• PLC5

• PLC5/250

processor family



processors

PLC5/40 processor

The CFM module performs high-speed totalizing and/or rate calculation operations for various industrial applications. The CFM module is a single-slot I/O module that interfaces between an Allen-Bradley PLC processor that has block-transfer capability and external I/O devices.

1771CFM

❶

The PLC processor transfers your

configuration data and output channel data to the CFM module using a block transfer write (BTW) instruction.

❹ When instructed by your ladder program,

the PLC processor performs a block transfer read (BTR) of the values (count and/or frequency in binary format) and stores them in a data table.

BTW

BTR

External devices generate

❷

input signals that are transmitted to the CFM module.

❸ The CFM module performs

❺ The PLC processor and CFM module

determine that the transfer was made without error.

The CFM module interfaces with:

• magnetic pickup flowmeters

• 440V dc pulses (TTL compatible)

• proximity probes

calculations on accumulated pulse counts.

Publication

17716.5.99 - December 1995

1–3Overview of the CFM Module

Typical Applications

PLC5/30 processor

You can use the CFM module in the 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

1771CFM

1771OFE

shaft speed

power supply

generator

electricity

PLC controller monitors shaft speed, performs PID calculations and adjusts valve.

shaft encoder

turbine

monitors fuel flow and total gallons

pulse output

fuel

19885

Publication

17716.5.99 - December 1995

1–4 Overview of the CFM Module

Input Capabilities

The CFM module accepts input for up to four channels (mode dependent). Each of the four input channels may accept these input signals:

•magnetic pickup — 50mV to 200V ac peak (optional 500mV to

200V ac peak for improved noise immunity)

•4-40V dc pulses with open collector (TTL compatible)

•proximity probe inputs

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

proximity transducer systems

–provides two isolated 24V dc power supplies (rated at 12mA)

to power external devices

You configure the CFM module’s four input channels for your specific application(s). Each input channel has two input selections:

flowmeter input (F0F3)  you connect your input device to this input (ac, TTL)

gate input (G0G3)  accepts 440V dc input pulse from open collector or external contact closure. Used in Totalizer and Nonresettable Totalizer modes to:

•store the current count of an input channel

upon impulse on gate

•interface to a prover when a prover is

enabled  used to store the count as the spheroid is sensed in the prover tube

four input channels

flowmeter input (F0) gate input (G0)

flowmeter input (F1) gate input (G1)

flowmeter input (F2) gate input (G2)

flowmeter input (F3) gate input (G3)

➀

Channel 0

Channel 1

Channel 2

Channel 3

➀

See

pages

2-9

and

2-10 for wiring diagrams.

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Selecting the Mode(s) of Operation

You configure the CFM module for these modes of operation:

1–5Overview of the CFM Module

Use this mode To

• accurately measure counts using a flowmeter

or positive displacement meter

• trigger outputs directly from the CFM module

 trigger on total, frequency, acceleration

Totalizer

Nonresettable Totalizer

Highresolution Frequency (channels 0&1 or channels 2&3)

Direction Sensor (channels 0&1 or channels 2&3)

➀

This mode uses two channels for one input (your input device is connected to F0 or F2, while F1 or F3 is unused).

➀

• monitor flow total, rate, and rate of change

independent of your PLC processor scan times

• store counts based on external input

• scale the frequency and count to

engineering units

• interface to a prover

operate in the Totalizer mode with the count reset function disabled to prevent loss of accumulated value

• monitor the frequency of an input with high

accuracy (e.g. shaft)

• monitor the rate of speed change

• operate outputs based on speed or

rate of change

• scale the frequency to engineering units

• monitor the direction of shaft rotation

• monitor rate of change and frequency

• trigger outputs based on direction, frequency,

rate of change

• scale the frequency and count to

engineering units

Indicators/

Alarms

overrange overflow overspeed acceleration

overspeed overrange acceleration

overspeed acceleration overrange

Prover

√ √ √ √

√ √ √

Total reset

Scaler values

√

Rollover

value

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1–6 Overview of the CFM Module

Using a Prover

A prover is used for the calibration of liquid meters in custody transfer applications. This calibration is done by comparing a metered throughput to a known volume in the prover. The number of pulses accumulated (Prover Total Count Value), while the spheroid moves between two detectors, is then compared to the predetermined volume of the prover section to ascertain the meter factor.

If you are using the Totalizer or Nonresettable Totalizer mode for capturing meter counts during a prover calibration, you have the option of selecting either of these types of provers:

unidirectional  the CFM module:

• begins counting when the spheroid passes the

first detector

• stops counting when the spheroid passes the second

detector (Prover Total Count Value is updated at this time)

bidirectional  the CFM module:

• begins counting when the spheroid passes the first detector

• stops counting when the spheroid passes the second

detector (Prover Total Count Value is updated at this time - intermediate value returned)

• continues counting when the spheroid returns past the

second detector

• stops counting when the spheroid returns past the first

detector (Prover Total Count Value is updated at this time)

detectors

spheroid

19884

Storing Current Count Values

If you are using the Totalizer or Nonresettable Totalizer mode and you are not using a prover, you can use the gate input to store the current count value of any (or all) of the four input channels.

The current count value of each channel is placed in a separate word in the BTR file (Store Count Value). The Store Count Value will remain in the BTR file until a new trigger pulse is received at the gate input. The Store Count Value is then updated to reflect the new value.

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1–7Overview of the CFM Module

Output Capabilities

The CFM module has four assignable outputs. These outputs are designed for applications that require fast response. The outputs:

• are electrically fused/current limited to 3A (output combinations

are limited to 7A)

• can be assigned to any input channel with user-selectable turn-on

and turn-off values

• are current sourcing at 5-40V dc (1A maximum per output)

• must be connected to an external power supply

• are in groups of two — this lets you use two separate external

power supplies if desired (one for outputs 0&1 and one for outputs 2&3)

Outputs may be forced on or off independent of count or frequency value. They may be forced on and off by setting bits in the BTW configuration block.

Important: You can assign as many as four outputs to a given

channel; however, you can not use the same output with two different channels.

In this mode of operation

Totalizer

Nonresettable Totalizer

Highresolution Frequency

Direction Sensor

You can assign outputs that are programmable to trigger

on total, rate, rate change (acceleration), total overflow or prover status on total, rate, rate change (acceleration), total overflow or prover status

on frequency or frequency rate of change (acceleration)

on either CLOCKWISE or COUNTERCLOCKWISE direction, acceleration or frequency (outputs are triggered ON only)

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1–8 Overview of the CFM Module

Totalizer

(programmable rollover)

This bit will toggle

count rollover

tivat

overrange alarm

all

frequency > 100kHz

Implementing Application Features

You can use the CFM module to implement programmable application features that are usually initiated by your PLC processor. This frees the PLC processor to do other tasks and helps increase the overall throughput of your PLC system.

This feature Is used in these modes To Alarm is ON when

overflow indication

overrange alarm all

overspeed alarm all

acceleration alarm all

Totalizer Nonresettable Totalizer

set an overflow flag when the count is greater than the highest allowable count (programmable  rollover). This bit will toggle with each successive rollover (010101). The count continues from zero. This bit can be reset in the BTW configuration block.

tivt vrrn lrm wh

e overrange alarm when rate is greater

ac than allowable Hertz (fixed at 100kHz).

activate overspeed alarm when frequency is higher than userspecified frequency value.

activate acceleration alarm when acceleration is greater than userspecified acceleration value.

n rt i rtr

count = rollover (default 10,000,000)

frequency > 100kHz

frequency > userspecified value

|acceleration| > userspecified value

What's Next

Install the CFM Module

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17716.5.99 - December 1995

Chapter

Install the CFM Module

What This Chapter Contains

Follow the instructions in this chapter to install the CFM module.

To install the CFM module See page

Understand Compliance to European Union Directive . . . . . .

Calculate Power Requirements . . . . . . . . . . . . . . . . . . . . . . 2-3

Set the Configuration Jumpers . . . . . . . . . . . . . . . . . . . . . . . 2-3

Check the Module Operation Jumper . . . . . . . . . . . . . . . . 2-3

Set the Input Channel Jumpers . . . . . . . . . . . . . . . . . . . . 2-4

Determine CFM Module Placement . . . . . . . . . . . . . . . . . . . 2-6

Key the Backplane Connector . . . . . . . . . . . . . . . . . . . . . . . 2-6

Install the Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

Make Connections to the Field Wiring Arm . . . . . . . . . . . . . .

ATTENTION: Electrostatic discharge can damage integrated circuits or semiconductors if you touch

backplane connector pins. Follow these guidelines when you handle the CFM module.

2-2

2-8

• Touch a grounded object to discharge static potential.

• Wear an approved wrist-strap grounding device.

• Do not touch the backplane connector or

connector pins.

• Do not touch circuit components inside the module.

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

• When not in use, keep the CFM module in its

static-shield bag.

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17716.5.99 - December 1995

2–2 Install the CFM Module

Understand Compliance to European Union Directive

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

EMC Directive

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

• EN 50081-2

EMC – Generic Emission Standard, Part 2 – Industrial Environment

• EN 50082-2

EMC – Generic Immunity Standard, Part 2 – Industrial Environment

This product is intended for use in an industrial environment.

Low Voltage Directive

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

For specific information that this EN requires, see the appropriate sections in this publication, as well as the following Allen-Bradley publications:

• Industrial Automation Wiring and Grounding Guidelines

(for noise immunity), publication 1770-4.1

• Guidelines for Handling Lithium Batteries, publication AG-5.4

• Automation Systems Catalog, publication B111

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17716.5.99 - December 1995

2–3Install the CFM Module

Calculate Power Requirements

Set the Configuration Jumpers

Your CFM module receives its power through the 1771 I/O chassis backplane from the chassis power supply. The maximum current drawn by the CFM module is 1.0A.

Add this value to the requirements of all other modules in the I/O chassis to prevent overloading the chassis backplane and/or backplane power supply.

ATTENTION: When using a 1771-P7 or 1771-PS7 power supply to power an I/O chassis, you cannot

place more than four CFM modules in this chassis. The interaction between the four CFM modules and the

1771-P7 or 1771-PS7 power supply (not 16A limit) prevents the power supply from powering up.

You check or set these jumpers:

• module operation jumper

• input channel jumpers

Check the Module Operation Jumper

Important: Make sure the module operation jumper is in the

CFM position (default setting).

CFM

QRD

QRC

If The Jumper Is Set In This Position

QRC QRD a QRD module (1 word BTW / 9 word BTR)

The CFM Module Will Operate As

a QRC module (no BTW / 3 word BTR)

19807

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2–4 Install the CFM Module

Set the Input Channel Jumpers

The CFM module has user-selectable jumpers for each flowmeter and gate input:

• flowmeter jumpers (F0-F3) — set jumper for low-pass filter

(70Hz) or high-speed operation

• gate jumpers (G0-G3) — set jumper for +5-12V or

+12-40V operation

The CFM module is configured for high-speed operation. If any input channel will be accepting input from a mechanical switch, you need to set the flowmeter jumper for that input channel to filter operation. The filter provides debouncing for the mechanical switch.

ATTENTION: The frequency of counting must be less than 70Hz when the filter mode is selected. If the

frequency exceeds 70Hz, the CFM module will not read the incoming pulse.

Remove the four screws securing the side cover

to the module and remove the covers.

19805

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17716.5.99 - December 1995

Reposition the flowmeter and gate jumpers associated

with each input channel according to your requirements.

The flowmeter and gate jumpers

➁

can be

set independent of each other (you can select the filter action for each flowmeter input and a voltage for each and gate input independently).

➀

FILTER

HIGH SPEED

2–5Install the CFM Module

5-12V

12-40V

gate jumpers

Reposition the cover and secure with

the fours screws removed in step 1.

flowmeter jumpers

➀

the filter position, the module will not read frequencies above 70Hz.

➁

Jumpers are shown in default settings.

19806

19813

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2–6 Install the CFM Module

ith

bit

ith

bit

icti

block transfer module

16bit or block transfer module

Determine CFM Module Placement

Place your module in any slot of the I/O chassis except for the extreme left slot. This slot is reserved for processors or adapter modules.

Use of data table 2slot addressing 1slot addressing 1/2slot addressing

Input Image Bits 8 Output Image Bits 8 Read Block Words 41 max Write Block Words

60 max

Place the CFM module in any module group w block transfer module.

Key the Backplane Connector

The CFM module is slotted in two places on the rear edge of the circuit board. These slots are intended to mate with the plastic keying bands supplied with the I/O chassis.

any 8



Place the CFM module in any module group w 16bit or block transfer module.

any 8



no restr

ons

ATTENTION: Observe the following precautions when inserting or removing keys:

• insert or remove keys with your fingers

• make sure that key placement is correct

Incorrect keying or the use of a tool can result in damage to the backplane connector and possible system faults.

Position the keying bands in the backplane connectors to correspond to the key slots on the CFM module.

I/O chassis

keying bands

CFM module

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I/O chassis backplane connector

17716.5.99 - December 1995

Place the keying bands:

between 2 and 4 between 6 and 8

You can change the position of these bands if subsequent system design and rewiring makes insertion of a different type of module necessary.

19808

2–7Install the CFM Module

Install the CFM Module

Place the module in the card guides on the top and bottom of the slot

that guide the CFM module into position.

Important: Apply firm even pressure on the module to seat it into

its backplane connector.

1771A1B, A2B, A3B, A3B1, A4B I/O chassis 1771A1B, A2B, A3B1, A4B Series B I/O chassis

locking

card guides

tab

ATTENTION:Remove power from the 1771 I/O chassis backplane before you install the CFM module.

Failure to remove power from the backplane could cause:

•injury

•equipment damage due to unexpected operation

•degradation of performance

locking bar pin

locking bar

card guides

Snap the chassis latch over the top of the module to secure it.

Attach the wiring arm (1771WN) to the horizontal

bar at the bottom of the I/O chassis.

The wiring arm pivots upward and connects with the module so you can install or remove the module without disconnecting the wires.

CFM module

Swing the chassis locking bar down into place to secure the modules. Make sure the locking pins engage.

wiring arm

1771WN

remove

horizontal bar

install

At power-up, the active and fault indicators are on. An initial module self-check occurs. If there is no fault, the fault indicator turns off. See page6–1 for information on interpreting the status indicators.

19809

17643

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2–8 Install the CFM Module

Make Connections to the Field Wiring Arm

DC source #1 @ 12mA RET (- proximity pickup)

DC source #2 @ 12mA RET (- proximity pickup)

Customer V DC #1 RET (Outputs 0 & 1 RET)

Customer V DC #2 RET (Outputs 2 & 3 RET)

Connect your I/O devices to the 40-terminal field wiring arm (cat. no. 1771-WN) shipped with the CFM module. Use the wiring examples on pages 2–9 and 2–10 for additional assistance on connecting your devices.

ATTENTION:Remove power to all I/O devices before you connect them to the wiring arm. Failure to

remove power from your I/O devices could cause:

•injury

•damage to module circuitry

•equipment damage due to unexpected operation

Even Numbered T

erminals 240

not used

G0 RET

G1 RET

F0 (500mV)

F0 Input

F1 (500mV)

F1 Input

F2 (500mV)

F2 Input

F3 (500mV)

F3 Input

G2 RET

G3 RET

Output 0

Output 2

Odd Numbered T

Chassis GND

+5V dc RET

F0 (TTL)

F0 RET

F1 (TTL)

F1 RET

+24V DC source #1 @ 12mA

+24V DC source #2 @ 12mA

F2 (TTL)

F2 RET

F3 (TTL)

F3 RET

Customer V DC #1 (5 to 40V)

Output 1

Customer V DC #2 (5 to 40V)

Output 3

erminals 139

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1771WN

(See applicable codes and laws.)

actual wiring runs in this direction

The sensor cable must be shielded. The shield:

•must extend the length of the cable, but be connected only at the

1771 I/O chassis

•must extend up to the point of termination

Important:The shield should extend to the termination point,

exposing just enough cable to adequately terminate the inner conductors. Use heat shrink or another suitable insulation where the wire exits the cable jacket.

10689I

2–9Install the CFM Module

Wiring Examples

These wiring diagrams represent wiring for a flowmeter input (F0), a gate input (G0) and an output (O0). See the wiring arm diagram on page2–8 for the terminals used in wiring F1-F3, G1-G3 and O1-O3.

Standard Magnetic Pickup

50mV threshold (F0)

2 4 6 8

not used  F0 (500mV)

Input Device

F0 Input

10 12

➀ ➀

Standard TTL or Open Collector

1.3V threshold (F0)

Important: To use a channel in TTL, jumper

the appropriate TTL pin to the appropriate RET

To use Channel 0 in TTL, jumper pin 9 to pin 11.

Input Device

1771WN

1 3 5 7 9

not

used  F0 (500mV)

F0 (TTL)  F0 RET

F0 Input

not used

2 4 6

8 10 12

➀

Standard Magnetic Pickup

500mV threshold (F0)

Important: T 500mV sensor pin to the appropriate RET. For

Channel 0, jumper pin 10 to pin 1

Input Device

o use a channel for

1771WN

1 3 5 7 9

F0 (TTL)

F0 RET

, jumper the 500mV

F0 (500mV)

F0 Input

1771WN

4 6

8 10 12

1 3 5 7 9

F0 (TTL) 

F0 RET

not used

Standard Proximity using CFM Module Source (F0)

+24V

DC source #1 @ 12mA RET (- proximity pickup)

Input Device

1771WN

2 4 6 8

not used  F0 (500mV)

F0 Input

10 12 14 16 18 20

1 3 5 7 9

F0 (TTL) 

F0 RET  not used 13 15

+24V DC source #1 @ 12mA to power a proximity transducer

17 19

not used

➀

For new installations, terminate the shields at

the chassis. While not recommended, existing installations can continue to terminate the shields at the return (RET) terminal.

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17716.5.99 - December 1995

2–10 Install the CFM Module

Standard Prover/Store Count (G0)

5-12V dc

12-40V dc

Standard Output (O0)

External Power Supply #1 540V dc @ 2A

LOAD 0

external device

➀

G0 RET

2 4 6

8 10 12

1771WN

1 3 5 7 9

➀

Output 0

➀

Customer V DC #1 RET

(Outputs 0 & 1 RET)

Customer V DC #1 (5 to 40V)

Output 1

What's Next

LOAD 1

➀

For new installations, terminate the shields at

the chassis. While not recommended, existing installations can continue to terminate the shields at the return (RET) terminal.

Edit Your Ladder Logic Program

1771WN

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17716.5.99 - December 1995

Chapter

Edit Your Ladder Logic Program

What This Chapter Contains

Enter Block Transfer Instructions

To initiate communication between the CFM 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.

To edit your ladder logic you See page

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

PLC2 Family Processors. . . . . . . . . . . . . . . . . . . . . . . . 3-2

PLC3 Family Processors. . . . . . . . . . . . . . . . . . . . . . . . 3-3

PLC5 Family Processors. . . . . . . . . . . . . . . . . . . . . . . . 3-4

PLC5/250 Processors. . . . . . . . . . . . . . . . . . . . . . . . . .

The CFM 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 CFM 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 CFM module and a PLC processor. These programs can be modified to suit your application requirements.

3-1

3-5

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3–2 Edit Your Ladder Logic Program

PLC2 Family Processor

Important: The CFM module functions with reduced performance

Use the following rungs to establish communication between the CFM module and a PLC-2 processor.

in PLC-2 systems. Because the CFM 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2 Processor Program Example

Rung M:1 The CFM module is located in rack 1, I/O group 1, slot 0. The data address 030 must be among the first available timer/

address used for block transfer

counter length other than 0 is desired, the BTR and BTW must not both be enabled in the same scan.

CFM BTR Done Bit

111

Rung M:2 The CFM module is located in rack 1, I/O group 1, slot 0. The data address 031 must be among the first available timer/

address used for block transfer

counter other than 0 is desired, the BTR and BTW must not both be enabled in the same scan.

CFM BTW Done Bit

111

Rung M:3 This rung is used to place a zero between the first available timer counters used for all block transfers and those used throughout the rest of the program.

UNUSED

must be = 0

032

Rung M:4 This rung uses the BTR done bit to trigger a FFM that moves the CFM status to a buffered data file. The program should access all CFM data from the file starting at 401.

CFM BTR Done Bit

111

CFM BTW Enable Bit

CFM BTR Enable Bit

. The default block length of 0 will return 41 words starting at address 301. If a block

CFM BTR Data Address

BTR

011

. The default length of 0 will send 60 words

011

BLOCK TRANSFER READ Data Addr: Module Addr: Block Length: File: 301-400

starting at address 201. If a block length

BTW

BLOCK TRANSFER WRITE Data Addr: Module Addr: Block Length: File: 201-300

FFM

FILE TO FILE MOVE Counter Addr:

Position: File Length: File A: File R: Rate per Scan:

030 110

031

110

033

41 41

301-351

401451

must be = 0

011

111 DN

011

06 111 DN

UNUSED

032

PUT

033

033 DN

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3–3Edit Your Ladder Logic Program

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.

PLC3 Processor Program Example

Rung M:0 The

CFM module is located in rack 3, I/O group 2, slot 1. The control file is a 10 word file starting at B17:0 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 41 words long.

CFM BTR/BTW Control Block

BTR

CFM BTR

Done Bit

B17:0

CFM BTR Error Bit

B17:0

The CFM module is located in rack 3, I/O group 2, slot 1. 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 CFM module is from PLC memory starting at N18:1, and with the default length of 0, is 60 words long.

CFM BTW

Done Bit

B17:0

BLOCK TRANSFER READ Rack Group Slot Control Data File Length

CFM BTR

Error Bit

B17:0

CFM BTR/BTW Control Block

BTW

BLOCK TRANSFER WRITE Rack

Group Slot Control Data Length

N18:101

B17:0

N18:1

that is shared

3 2

CFM BTW

Error Bit

B17:0

CFM BTW

Error Bit

B17:0

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3–4 Edit Your Ladder Logic Program

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.

PLC5 Processor Program Example

Rung 2:0 The CFM module is located in rack 0, I/O group 2, slot 1. The integer compatible with all PLC5 family members. The data obtained by the PLC5 processor from the CFM module is placed in memory starting at N22:101, and with the default length of 0, is 41 words long. The length can be any number between 0 and 41. In enhanced PLC5 processors

CFM BTR Enable Bit

N22:200

CFM BTW Enable Bit

N22:205

Rung 2:1

CFM module is located in rack 0, group 2, slot 1. The integer control file starts at N22:205, is a 5 words long and is compat

The ible will all PLC5 family members. The data sent by the PLC5 processor to the CFM module starts at N22:1, and with the default length of 0, is 60 words long. Valid BTW lengths: 0, 1, 2, 3, 4, 14, 24, 34, 44, 48, 52, 56 and 60. In enhanced PLC5 processors

CFM BTR Enable Bit

N22:200

CFM BTW Enable Bit

N22:205

➀

, the block transfer data type may be used as a control file.

control file starts at N22:200, is 5 words long and is

CFM BTR

BTR BLOCK TRANSFER READ

Rack Group Slot Control Data File Length Continuous

BTW BLOCK TRANSFER WRITE

Rack Group Slot Control Data File Length Continuous

Control File

CFM BTW Control File

N22:200 N22:101

N22:205

N22:1



Publication

➀

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

17716.5.99 - December 1995

3–5Edit Your Ladder Logic Program

PLC5/250 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 will automatically select 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.

PLC5/250 Processor Program Example

Rung 1STEPO:1 The

CFM module is located in rack 14, I/O group 1, slot 0. The data CFM module is placed in the data table starting at 2BTD5:101, and with the default length of 0, is 41 words long. The length can be any number between 0 and 41.

CFM BTR Enable Bit

BR141:0

Rung 1STEPO:1

CFM module is located in rack 14, I/O group 1, slot 0. The data sent to the CFM module from the PLC5/250 processor

The is from the data table starting at 2BTD5:1, and with a default length of 0, is 60 words long. Valid BTW lengths: 0, 1, 2, 3, 4, 14, 24, 34, 44, 48, 52, 56 and 60.

CFM BTR Enable Bit

BR141:0

CFM BTW Enable Bit

BW141:0

CFM BTW Enable Bit

BW141:0

obtained by the PLC5/250 processor from the

CFM BTR

BTR

BLOCK TRANSFER READ Rack Group Slot Control Block Data File BT Length Continuous

BT Timeout 4

BTW

BLOCK TRANSFER WRITE Rack Group Slot Control Block Data File BT Length Continuous BT Timeout 4

Control File

1 0

BR141:0

2BTD5:101

CFM BTW Control File

1 0

BW141:0

2BTD5:1

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3–6 Edit Your Ladder Logic Program

What's Next

Configure the CFM Module

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17716.5.99 - December 1995

Chapter

Configure the CFM Module

What This Chapter Contains

Understand the CFM Module's BTW Structure

Use this chapter to configure the CFM module.

To configure the CFM module See page

Understand the CFM Module's BTW Structure . . . . . . . . . . . . 4-1

BTW Configuration Block . . . . . . . . . . . . . . . . . . . . . . . . 4-2

Select the Mode(s) of Operation . . . . . . . . . . . . . . . . . . . . . . 4-8

Configure the CFM Module . . . . . . . . . . . . . . . . . . . . . . . . . 4-16

Using I/O Configuration Software . . . . . . . . . . . . . . . . . . . 4-16

Setting Bits in the BTW Configuration Block . . . . . . . . . . .

Important: You must edit your ladder logic as shown in chapter 3

before you can use this chapter to configure the BTW configuration block.

Data is conditioned through a group of data table words that are transferred from the PLC processor to the CFM module using a BTW instruction. Now that you have entered BTW and BTR instructions into your ladder logic, you are ready to enter data into the BTW instruction. This data should conform to the input device and specific application that you have chosen.

4-16

During normal operation, the processor transfers from 1 to 60 words to the CFM module when you program a BTW instruction to the CFM module’s address.

Important: You must program at least one BTW, with a word

length of 4, to get useful data back from the CFM module.

For See page(s)

a general overview of the CFM module's BTW configuration block

detailed descriptions of each word in the BTW configuration block 4-3 through 4-7

4-2

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4–2 Configure the CFM Module

BTW Configuration Block

➀

Word(s)

1 Header Prover

2 Output 1 Trigger T

3 Output 3 Trigger T

4 Channel

15, 25, 35

6, 16, 26, 36

7, 17, 27, 37

8, 18, 28, 38

9, 19, 29, 39

10, 20, 30, 40

1, 21, 31, 41

12, 22, 32, 42

13, 23, 33, 43

14, 24, 34, 44

45,

49, 53, 57

46, 50, 54, 58

47, 51, 55, 59

48, 52, 56, 60

➀

Valid

BTW lengths are: 0, 1, 2, 3, 4, 14, 24, 34, 44, 48, 52, 56, 60.

➁

ALL

numeric values are in binary

➂

When scaling is used, all outputs are still controlled by the actual value not the scaled value.

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

Block

Output

1 and Output 0 T

Output

3 and Output 2 T

Input

Channel Operating Mode

Input

Channel Configuration

Channel 0 (words 514) Channel 1 (words 1524) Channel 2 (words 2534) Channel 3 (words 3544)

Frequency

10ths

Bandwidth

Limit

Sampling

Termination

4 x

High Hz

Prover

Type

Acceleration Alarm V

Frequency Scaler Multiplier

Rollover Value  Most Significant Digit (0999 x 10,000)

Rollover Value  Least Significant Digit (09,999)

Number of Pulses to T

Output

Output 0 (words 4548) Output 1 (words 4952) Output 2 (words 5356) Output 3 (words 5760)

Output ON value  Most Significant Digit (0999 x 10,000)

Output ON value  Least Significant Digit (09,999)

Output OFF value  Most Significant Digit (0999 x 10,000)

Output OFF value  Least Significant Digit (09,999)

➁

Bit

ID & Resets

Run Initialize

rigger & Select

ie Output 1 to Channel

rigger & Select

ie Output 3 to Channel

Channel 2

Debounce

Filtering

ÉÉ

Minimum Frequency Sampling T

erminate Sampling

Highest Allowable Frequency

alue (what rate to trigger on)

➂

otal Scaler Multiplier

otal Scaler Divisor

➂

Configuration

Overflow Reset

Output 0 T

Output 2 T

rigger T

Channel 1

Acceleration Calculation Time

ime

Frequency Scaler Divisor

otal Reset

ie Output 0 to Channel

ie Output 2 to Channel

Channel 0

➂

word #

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BTW Word Description Key

Bits

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

Description of what these bits are used for.

Mode(s) that use these bits.

17716.5.99 - December 1995

Mode

abbreviations: Totalizer = T Nonresettable T

otalizer = NR

T Highresolution Frequency = HR Direction Sensor = DS

word 1

4–3Configure the CFM Module

BTW Word Descriptions

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

0010

Header must be 0010. Identifies the module as a CFM module.

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

word 2

Output 1 Trigger selects what channel characteristic output 1 is triggered ON or OFF by placing the shown hex values in these bits: 0 = Force OFF 1 = Frequency 2 = % of Fullscale Frequency 3 = Acceleration 4 = Total Value 5 = Direction

all

NRT, HR

6 = Overflow 7 = Prover Running

, NR

8 = Prover Range F = Force ON

all

Prover Run Initialize initializes the channel for prover inputs on the Gate. Also resets Store Count Value (BTR words 13 & 14). Only occurs on a change in bit state from a 0 to a 1. This bit should remain ON (= 1) until the prover is done or until the prover run is aborted. b08 = Counter 0 b10 = Counter 2 b09 = Counter 1 b11 = Counter 3

If this bit is OFF (= 0), a low to high transition of the Gate will store the current count in Store Count Value (BTR words 13 & 14).

T, NRT

Tie Output 1 to Channel ties output 1 to operate according to the state of a specific channel. b08 = Counter 0 b10 = Counter 2 b09 = Counter 1 b11 = Counter 3

Output 0 Trigger selects what channel characteristic output 0 is triggered ON or OFF by placing the shown hex values in these bits: 0 = Force OFF 1 = Frequency 2 = % of Fullscale Frequency 3 = Acceleration 4 = Total Value 5 = Direction 6 = Overflow 7 = Prover Running 8 = Prover Range F = Force ON

Overflow Reset resets the overflow status of the module for the appropriate counter on a 0 to 1 transition. Only occurs on a change in bit state from a 0 to a 1. b04 = Counter 0 b06 = Counter 2 b05 = Counter 1 b07 = Counter 3

T, NRT

all

, NR

, NRT, HR

all

, NR

all

Total Reset resets the total count for the appropriate counter on a 0 to 1 transition. Only occurs on a change in bit state from a 0 to a 1. b00 = Counter 0 b01 = Counter 1 b02 = Counter 2 b03 = Counter 3

Tie Output 0 to Channel

ties output 0 to operate according to the state of a specific channel. b00 = Counter 0 b01 = Counter 1 b02 = Counter 2 b03 = Counter 3

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

word 3

Output 3 Trigger selects what channel characteristic output 3 is triggered ON or OFF by placing the shown hex values in these bits: 0 = Force OFF 1 = Frequency 2 = % of Fullscale Frequency 3 = Acceleration 4 = Total Value 5 = Direction

all

, NR

, NRT, HR

6 = Overflow 7 = Prover Running

, NR

8 = Prover Range F = Force ON

all

Tie Output 3 to Channel ties output 3 to operate according to the state of a specific channel. b08 = Counter 0 b10 = Counter 2 b09 = Counter 1 b11 = Counter 3

Output 2 Trigger selects what channel characteristic output 2 is triggered ON or OFF by placing the shown hex values in these bits: 0 = Force OFF 1 = Frequency 2 = % of Fullscale Frequency 3 = Acceleration 4 = Total Value 5 = Direction

all

, NR

, NRT, HR

6 = Overflow 7 = Prover Running

, NR

8 = Prover Range F = Force ON

all

Publication

Tie Output 2 to Channel

ties output 2 to operate according to the state of a specific channel. b00 = Counter 0 b01 = Counter 1 b02 = Counter 2 b03 = Counter 3

17716.5.99 - December 1995

4–4 Configure the CFM Module

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

word 4

Operating Mode for Channel 3

Select a mode of operation on a per channel basis by placing the shown hex values in the proper bits:

word 5 (channel 0)

word 5 (channel 0) word 15 (channel 1)

word 15 (channel 1) word 25 (channel 2)

word 25 (channel 2) word 35 (channel 3)

word 35 (channel 3)

Frequency in 10ths allows you to select the precision of the frequency returned in the BTR. If set, the frequency is returned with the LSD being in tenths, while if 0, the LSD is in ones.

= frequency returned as 100, 123

1 = frequency returned as 100, 123.2

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

Operating Mode for Channel 2

0 = unused channel 1 = Totalizer 3 = Highresolution Frequency (channels 0 & 1 or 2 & 3) 2 = Nonresettable Totalizer 4 = Direction Sensor (channels 0 & 1 or 2 & 3)

➀

These modes are selected only via channel 0 or channel 2.

➁

If using both channels (0 & 1 and 2 & 3) for this mode, you cannot set sampling time for both = 4ms.

Sampling Termination

if set, enables the input sampling to be terminated on either a time base only (BTW 6) or a set number of input pulses (BTW 7) depending on which condition arises first. HR

Bandwidth Limit if set, limits the minimum frequency the CFM module is capable of reading to 1/Minimum Frequency Sampling Time. When 1: the worst case response time of the module is decreased to approximately 2 x Minimum Frequency Sampling Time. When 0: frequency range = 1Hz  100kHz (worst case response time can be 2s at extremely low frequencies) 0 = full frequency range (1Hz  100kHz) 1 = minimum frequency (1/Minimum Frequency Sampling Time)

all

Operating Mode for Channel 1

Debounce Filtering

debounces the Gate input for a period of 1s. The first low to high transition of the gate will cause the CFM module to take appropriate action (no other transitions will be seen for 1s). 0 = OFF / 1 = ON

T, NRT

Prover Type selects the type of prover being used (unidirectional or bidirectional): 0 = unidirectional (1 run, 2 switches) 1 = bidirectional (4 switch run) T, NRT

4 x High Hertz if set, the Highest Allowable Frequency entry is multiplied by 4 to enable

entries > 32,767.

For example, to get a 100,000 peak allowable frequency, you set this bit and enter 25,000 in the word containing the Highest Allowable Frequency (BTW 8, 18, 28 or 38).

all

Operating Mode for Channel 0

➀

➀➁

Acceleration Calculation Time

calculates acceleration every Nth frequency sample. 0 = acceleration rolling average over 5 samples 1750 = number of frequency samples (BTW 9 Acceleration Alarm Value must 0 0).

For example, if you place a value of 7 here, the CFM module:

a. stores the 1st frequency calculation b. subtracts this calculation from the

8th frequency sample

c. divides this remainder by the time

between samples and places the result in BTR 11, 20, 29 or 38

d. stores the 8th frequency sample

and waits for the 15th sample

all

word 6 (channel 0) word 16 (channel 1)

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

word 26 (channel 2) word 36 (channel 3)

Minimum Frequency Sampling Time specifies the minimum time the CFM module spends to determine frequency (unless Number of Pulses to Terminate Sampling is enabled in Highresolution Frequency mode, which may allow the the input channel to end sampling earlier than the specified minimum).

Important: In Direction Sensor, this time is used to determine the maximum

sample time and the minimum frequency returned and does not actually determine the time period for frequency sampling.

all

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RANGE: 4ms  1000ms (0  3 = DEFAULT) DEFAULTS: HR, DS = 4ms / T, NRT = 100ms

The maximum sampling time is:

< 2s  if the Bandwidth Limit is not enabled and a signal < 1 Hz is applied (sample time [ Minimum Frequency Sampling Time + 1/frequency input)

< 2 x the Minimum Frequency Sampling Time  if

Bandwidth Limit is enabled and a very low input signal frequency is applied (sample time [ Minimum Frequency Sampling Time + 1/frequency input)

4–5Configure the CFM Module

word 7 (channel 0) word 17 (channel 1) word 27 (channel 2) word 37 (channel 3)

word 8 (channel 0) word 18 (channel 1) word 28 (channel 2) word 38 (channel 3)

word 9 (channel 0) word 19 (channel 1) word 29 (channel 2) word 39 (channel 3)

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

Number of Pulses to Terminate Sampling  applied when Sampling Termination (bit 13 of word 5, 15, 25 or 35) is set. Causes the sampling to cease when the specified number of input pulses are received or the Minimum Frequency Sampling Time is exceeded, which ever occurs first. RANGE: 032,767

Highresolution Frequency

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

Highest Allowable Frequency  the highest frequency allowed on the channel. When the specified frequency is exceeded, the channel's overspeed alarm will activate. Also used to calculate Percent of Full Scale (BTR word 6,15,24,33). RANGE: 0  32,767 DEFAULT: 0 (=120,000) Used with the 4 x High Hertz (bit 12 of word 5, 15, 25, or 35) to have an effective range of 0120,000.

all

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

word 10 (channel 0) word 20 (channel 1) word 30 (channel 2) word 40 (channel 3)

Acceleration Alarm Value determines at what acceleration values (Hz/s) the BTR alarm bits are activated. The alarm bits occur when the absolute value of the acceleration exceeds the Acceleration Alarm Value. This word also determines whether acceleration is calculated. A value of 0 deactivates all acceleration calculations. RANGE: 0  32,767 (0 disables)

all

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

Frequency Scaler➀ Multiplier  the frequency value returned in the BTR is multiplied by the specified value. RANGE: 0255 DEFAULT: 1 all

Frequency Scaler Divisor  the frequency value returned in the BTR is divided by the specified value. RANGE: 0255 DEFAULT: 1 all

Important: The Frequency Multiplier must be ≤ the Frequency Divisor.

Example:

Frequency Divisor = 50, Frequency Multiplier = 6 and frequency at the input = 75 Hz,

the scaled value returned will be 6/50(75) = 9

➀

When

scaling is used, all outputs are still controlled by the actual value (in example, 75Hz) not the scaled value (in example, 9).

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4–6 Configure the CFM Module

word 11 (channel 0) word 21 (channel 1) word 31 (channel 2) word 41 (channel 3)

word 12 (channel 0) word 22 (channel 1) word 32 (channel 2) word 42 (channel 3)

word 13 (channel 0) word 23 (channel 1) word 33 (channel 2) word 43 (channel 3)

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

Total Scaler➀ Multiplier  the total value returned in the BTR is multiplied by the specified value.

RANGE: 032,767 DEFAULT: 1

Important: The Total Scaler Multiplier must be ≤ Total Scaler Divisor

See Total Scaler Divisor.

T, NRT

➀

When scaling is used, all outputs are still controlled by the actual value not the scaled value.

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

Total Scaler➀ Divisor  the total value returned in the BTR is divided by the specified value.

RANGE: 0  32,767 DEFAULT: 1

Important: The Total Scaler Multiplier must be ≤ Total Scaler Divisor.

See Total Scaler Multiplier.

T, NRT

➀

When scaling is used, all outputs are still controlled by the actual value not the scaled value.

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

MSD - ranges from 0999 x 10,000

word 14 (channel 0) word 24 (channel 1) word 34 (channel 2) word 44 (channel 3)

Rollover Value  the count value that the totalizer will reset or rollover to 0 at.

T, NRT

RANGE: 0  9,999,999 DEFAULT: 0 (which is rollover of 10,000,000)

Important: The Rollover Value must be ≥ (actual frequency x 10ms).

If you are using the prover function, the expected Prover Total Count Value (BTR words 13/14, 22/23, 31/32, or 40/41) must be < Rollover Value.

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

LSD  ranges from 09,999

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4–7Configure the CFM Module

word 45 (channel 0) word 49 (channel 1)

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

word 53 (channel 2) word 57 (channel 3)

Output ON Value  the value at which the output turns ON.

word 46 (channel 0) word 50 (channel 1) word 54 (channel 2) word 58 (channel 3)

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

and OFF output values can be triggered by:

Frequency Percent of Fullscale Acceleration Total Direction

Overflow Prover Range of Operation

(use LSD word 46, 50, 54, 58

Prover Running

unidirectional prover: ON from 25 bidirectional prover: ON from 23 and 45

= 0120,000

= 032,767 (use LSD word 46, 50, 54, 58

= -32,768  32,767 (use LSD word 46, 50, 54, 58

= 09,999,999

= 0 (stopped), 1 (clockwise), 2 (counterclockwise)

(use LSD word 46, 50, 54, 58

= 0 (output follows

= 0  Output is ON when the prover is actually counting.

Overflow

= 05  ON and OFF values must be different

only)

bit, BTR words 4 & 5)

Important: When any type of scaling is used (frequency or total),

outputs are always triggered by the actual value not the

scaled value. Outputs triggered by Total turn ON in < 100µs and turn OFF in < 100µs. All other ON and OFF times

are < 1ms.

only)

MSD  ranges from 0999 x 10,000

all

LSD  ranges from 09,999

Prover

Range of Operation (value of bits in hex)

prover not selected

0 = 1 =

prover is not running, but prover running  past the 1st switch in forward leg

2 = 3 =

prover is done with forward leg, returning at this time  midrun value (bidirectional only)

4 =

prover is returning on 2nd leg (bidirectional only)

5 =

prover is done with run (BTR word 13/14 contains prover count value)

On Value

output on while >=

12,000 15,000

output on when >=

and < Off

or <

Off

active

f V

alue

12,00015,000

word 47 (channel 0) word 51 (channel 1) word 55 (channel 2) word 59 (channel 3)

word 48 (channel 0) word 52 (channel 1) word 56 (channel 2) word 60 (channel 3)

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

MSD  ranges from 0999 x 10,000

Output OFF Value  the value at which the output turns OFF. all

LSD  ranges from 09,999

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

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4–8 Configure the CFM Module

Total Multipli

Select the Mode(s) of Operation

Use Totalizer mode if you:

• need counting (totalization) capabilities

• can measure frequency over a fixed

sampling period (4ms1s)

• need a frequency value

• need prover capabilities

• need count storage capabilities

• also want to calculate acceleration

Use Nonresettable Totalizer mode if you want to use the features of the

Totalizer mode with NO BTW reset capabilities.

Typical applications:

• measuring ingredients in a

batch process

• oil pipeline terminals (prover)

You select the mode(s) of operation and configure each input channel to accept input signals from your input device(s).

Totalizer and Nonresettable Totalizer Modes

These modes measure incoming pulses over a user-specified time interval (4-1000ms). In either of these modes, the CFM module calculates:

• rate of input (0-100,000Hz)

• total count (0-9,999,999)

• acceleration value

• optional prover value

• optional store count value (current count value)

PLC processor

BTW

BTR

configuration

status and input data

1771CFM

F0 G0

prover/store

input device

Counting

In these modes, the CFM module counts pulses based on values you enter in the BTW configuration block. You can specify these values:

Value BTW word # Use to

specify the value at which the CFM module will rollover to zero and begin counting again. DEFAULT: 0 = 10,000,000 RANGE: 09,999,999

Rollover

Overflow Reset 1 (bits 0407)

Total Reset

(Totalizer mode only)

Total Scaler Multiplier 11, 21, 31, 41

Total Scaler Divisor 12, 22, 32, 42

13/14, 23/24, 33/34, 43/44

1 (bits 0003)

Important: Every time a rollover occurs, the CFM module changes the

resets the overflow status of the CFM module for the appropriate input channel. When this bit is set, the CFM module will reset the Overflow Status (BTR words 4 & 5, bits 02 & 10). Overflow Status toggles between 0101 every time a rollover occurs. Overflow Status is not affected by

Total Reset.

reset the total count to zero. This occurs on a change in bit state from a 0 to a 1. This value does not effect the Overflow Status (BTR word 4 & 5, bits 2 & 10).

scale the returned total count to actual engineering units. For each value RANGE: 032,767 DEFAULT: 1

The scaled value can not be used to trigger any outputs (outputs triggered by count are triggered by actual count).

state of the Overflow Status bit. (toggles between 0  1 every time an overflow occurs). The Overflow Status can also be manually reset in the BTW (word 1, bits 0003).

er must be < Total Divisor.

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4–9Configure the CFM Module

Bandwidth Limit

(word 5, bit 14)

set (ON)?

and

no pulses are received after the sampling time expires, the frequency is calculated up to 2s after the initial pulse and will measure frequencies as low as 1Hz.

Value BTW word # Use to

Minimum Frequency Sampling Time 6, 16, 26, 36

Bandwidth Limit

Acceleration Calculation Time 5, 15, 25, 35 (bits 0009)

Acceleration Alarm 9, 19, 29, 39

Frequency Multiplier/Divisor 10, 20, 30, 40

Highest Allowable Frequency 8, 18, 28, 38

and

no pulses are received

within one more sample time, the frequency will then be calculated. The minimum frequency is then 1/Minimum Frequency

Sampling Time

maximum time period is 2 x Minimum Frequency Sampling Time.

and the

Frequency

Sampling

In the Totalizer and Nonresettable Totalizer modes, the CFM module begins a frequency sample arbitrarily and ends the sampling within 1ms after the sampling time has expired and one pulse has been detected. You can use Bandwidth Limit to exert control over the CFM module’s frequency sampling.

In these modes, the CFM module calculates frequency based on these values:

specify the minimum time the CFM module will spend collecting pulses to determine a frequency. The time period begins arbitrarily, not on a leading edge of a pulse.

Frequency is calculated after a pulse occurs and the time has expired. The total time is measured and used with the sampled counts to determine a frequency. This frequency value is in BTR word 7/8, 16/17, 25/26 or 34/35.

As the actual frequency decreases, the actual sample time will increase (for frequencies < 1Hz, it can take as long as 2s to calculate the frequency). See Bandwidth Limit.

control the maximum time the CFM module spends calculating a frequency and the minimum frequency that can be read by the CFM module.

5, 15, 25, 35 (bit 14)

If ON: limits the maximum time period to 2 x Minimum Frequency

Sampling Time and minimum frequency to 1/Minimum Frequency Sampling Time.

If OFF: maximum time period is 2s, minimum frequency is 1Hz. specify the number of frequency samples the CFM module will

spend to calculate the acceleration value. The default value (0) will calculate a rolling average of the previous five samples.

Since the frequency sample time may vary, so does the actual acceleration calculation time.

determine the acceleration value that, if exceeded, will activate the BTR Acceleration Alarm (word 4 & 5, bits 00 & 08). RANGE: 032,767

The CFM module will not calculate an acceleration if this acceleration value is zero.

scale the returned frequency and acceleration to actual engineering units. Frequency Multiplier must be < Frequency Divisor. For each value RANGE: 0255 DEFAULT: 0 (= 1

no scaling)

The scaled frequency/acceleration values can not be used to trigger any outputs (outputs triggered by frequency/ acceleration are triggered by actual frequency/acceleration).

specify the highest frequency value allowed on the input channel. When this value is exceeded, the input channel's overspeed alarm will activate.

This value is also used in calculating Percent of Full Scale (BTR, word 6, 15, 24 or 33).

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4–10 Configure the CFM Module

Value BTW word # Use to

Prover Run Initialize

Debounce Filtering 5, 15, 25, 35 (bit 10)

1 (bits 0811)

Storing Count Value

In the Totalizer and Nonresettable Totalizer modes, the CFM module stores the current count based on these values:

initialize an input channel for prover inputs on the gate or to store current count value (if prover not used).

If OFF (=0)  CFM module stores the current count every time there is a low to high transition at the appropriate gate input terminal. As each value is stored, the Prover Status (BTR words 4 & 5, bits 46) will be updated to indicate a new value. Prover Status toggles between 6 and 7 (hex) as each new gate transition occurs: 6 = prover not active & new store count A 7 = prover not active & new store count B

If ON (= 1)  the CFM module resets to 0 any previously stored count contained in Store Count Value (BTR words 13 & 14, 22 & 23, 31 & 32, or 40 & 41) and then waits for the proper number of gate transitions to occur (2 for unidirectional and 4 for bidirectional).

As the gate transitions occur updated accordingly, dependent upon the current state of the prover: 0 = prover not selected 1 = prover running, but not active 2 = prover running  past the 1st switch in forward leg 3 = prover is done with forward leg, returning at this time

 midrun value (bidirectional only) 4 = prover is returning on 2nd leg (bidirectional only) 5 = prover is done with run (BTR word 13/14 contains prover count value)

The prover run is aborted and the Prover Status is set to 0 any time Prover Run Initialize is set to 0. The time between gate transitions must be long enough to allow the PLC processor to perform a BTR and get the updated stored value.

debounce gate input for a period of 1s.

If ON: CFM module takes appropriate action at the first low to high transition (at the gate input) and ignores all other gate transitions for 1s.

If OFF: CFM module takes appropriate action at every low to high transition (at the gate input).

Prover Status (BTR words 4 & 5, bits 46) is

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Highresolution Frequency Mode

4–11Configure the CFM Module

Use this mode if you:

• need accurate frequency value

(see page A-1 for frequency accuracy)

• need fastest possible sample

update time across large frequency range

• want to calculate acceleration

• need to measure frequency in 10ths of Hz

(0.1Hz)

Typical application:

turbine generators

This mode measures incoming pulses over a user-specified time interval (4-1000ms) or over a user-specified number of input signal pulses. In this mode, the CFM module calculates:

• rate of input (0-100,000Hz)

• acceleration value

PLC processor

BTW

configuration

BTR

status and input data

Frequency

Sampling

In the High-resolution Frequency mode, frequency sampling begins on the leading edge of the first pulse to occur and ends on the next pulse to occur after the sampling time has expired or after the user-specified number of pulses has occurred. In this mode, the CFM module calculates frequency based on values you enter in the BTW configuration block.

1771CFM

F0 G0

uses channels 0&1 or 2&3

not used

input device

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17716.5.99 - December 1995

4–12 Configure the CFM Module

Value BTW word # Use to

Minimum Frequency Sampling Time

➀

Sampling Termination 5, 15, 25, 35 (bit 13)

Bandwidth Limit 5, 15, 25, 35 (bit 14)

Acceleration Calculation Time 5, 15, 25, 35 (bits 0009)

Acceleration Alarm 9, 19, 29, 39

Number of Pulses to Terminate Sampling 7, 17, 27, 37

Highest Allowable Frequency 8, 18, 28, 38

Frequency Scaler Multiplier/Divisor 10, 20, 30, 40

➀

If you are setting this value for both channels (0 & 1 and 2 & 3), the Minimum Frequency Sampling Time for both cannot = 4ms (one can = 4ms and the other can = 5ms, but both cannot = 4ms).

You can specify these values:

specify the minimum time the CFM module will spend collecting

6, 16, 26, 36

pulses to determine a frequency. The sample begins on the leading edge of a pulse.

terminate the sampling on either a time base or a set number of pulses, depending on which occurs first.

control the maximum time the CFM module spends calculating a frequency and the minimum frequency that can be read by the CFM module.

specify the number of frequency samples the CFM module will spend to calculate the acceleration value. The default value (0) will calculate a rolling average of the previous five samples.

Since the actual frequency sample time can vary, so does the

Acceleration Calculation Time.

determine the acceleration value that, if exceeded, will activate the BTR Acceleration Alarm (word 4 & 5, bits 00 & 08). RANGE: 032,767 The CFM module will not calculate an acceleration if this acceleration value is zero.

terminate the sampling when the specified number of input pulses are received.

specify the highest frequency value expected on the input channel. When this value is exceeded, the input channel's overspeed alarm will activate.

This value is also used in calculating Percent of Full Scale (BTR word 6, 15, 24 or 33).

scale the returned frequency and acceleration to actual engineering units.

Frequency Multiplier must be < Frequency Divisor.

For each value RANGE: 1255 DEFAULT: 1

The scaled frequency/acceleration value can not be used to trigger any outputs (outputs triggered by frequency/acceleration are triggered by actual frequency/acceleration).

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17716.5.99 - December 1995

Sampling Termination

(for input channel 0)

Sampling Termination

(word 5, bit 13)

CFM module calculates frequency based on Minimum

Frequency Sampling Time

(word 6)

➀

The

module calculates a new frequency on the next pulse to occur after the expiration of the specified time; therefore, the actual period will be longer than specified in word 6. Upon calculation of the frequency

Use these diagrams to understand how you use Sampling Termination and Bandwidth Limit to exert even more control over

the CFM module’s frequency sampling.

The CFM module calculates frequency on the next pulse to occur after time expires.

CFM module calculates frequency immediately after the specified number of pulses occur.

set (ON)?

➀

, the outputs are updated.

Minimum Frequency

Sampling Time

(word 6)

expired?

Number of Pulses

to Terminate Sampling

(word 7)

received?

4–13Configure the CFM Module

Bandwidth

Limit

(for input channel 0)

Sampling termination

OFF (= 0) OFF (= 0) 1Hz

OFF (= 0) ON (= 1) 1/Minimum Frequency Calculation Time

ON (= 1) OFF (= 0) 1Hz

ON (= 1) ON (= 1) 1/Minimum Frequency Calculation Time

➀

The terminate conditions assume a start pulse has been received.

➁

The next sample begins at the first pulse that occurs after a valid sample is taken.

Bandwidth limit

The minimum frequency the CFM module can detect

Bandwidth Limit

(word 5, bit 14)

set (ON)?

is 1/Minimum Frequency Calculation Time. When set, the CFM module will spend no more than (2 x Minimum Frequency Sampling Time) to determine a new frequency value.

The CFM module can distinguish frequencies as low as 1Hz. At low frequencies (< Minimum Frequency Sampling Time), the CFM module may take as long as 2s to calculate a new frequency value.

Terminate Conditions

Minimum frequency distinguishable

➀

Frequency sample taken➁ and outputs updated when

Minimum Frequency Sampling Time elapsed

at least one pulse received

and

2s elapsed and

Minimum Frequency Sampling Time elapsed and at least one pulse received

(2 x Minimum Frequency Sampling Time) elapsed

no pulse received

and

Number of Pulses to Terminate Sampling received

Minimum Frequency Sampling Time elapsed

at least one pulse received

and

2s elapsed and

Number of Pulses to Terminate Sampling received

Minimum Frequency Sampling Time elapsed

at least one pulse received

and

(2 x Minimum Frequency Sampling Time) elapsed

no pulse received

and

no pulse received

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17716.5.99 - December 1995

4–14 Configure the CFM Module

Direction Sensor Mode

Use this mode if you want to determine

shaft direction.

Typical Applications:

• turbine generators

• pumps

Use this mode to measure shaft direction. In this mode, the CFM module calculates:

• rate of input (0-100,000Hz)

• acceleration value

• direction of shaft

PLC processor

BTW

configuration

BTR

status and input data

F0 & F1 used in TTL

Frequency

Sampling

In this mode, frequency samples are taken every revolution by measuring A and B:

1771CFM

G0 F1

uses channels 0&1 or 2&3

not used

clockwise

counterclockwise

= the time between F0 input channel pulses (determines shaft frequency)

= the time between F0 and F1 input channel pulses (determines shaft direction)

If Direction is

B < 1/2 A

B > 1/2 A

shaft

notch

shaft

clockwise

counterclockwise

low true signal

proximity sensors at F0 and F1 should be

60 to 120° apart

low true signal

sensor F1

Both sensors cannot be low at the same time.

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17716.5.99 - December 1995

Value BTW word # Use to

determine

Minimum Frequency Sampling Time

6, 16, 26, 36

sample times are based on the time between F0 or F2 pulses.

If Bandwidth Limit is OFF (= 0), Minimum Frequency Sampling Time is not used.

control the maximum time the CFM module spends calculating a frequency and the minimum frequency that can be read by the CFM module.

If ON: limits the maximum time period to 2 x Minimum Frequency Sampling Time and minimum

Bandwidth Limit 5, 15, 25, 35 (bit 14)

frequency to 1/Minimum Frequency Sampling Time. Frequencies < 1/Minimum Frequency Sampling Time are reported as stopped.

If OFF: maximum time period is 3s, minimum frequency is 1Hz and direction can be sensed to 1/3Hz. Minimum Frequency Sampling Time is not used.

specify the number of frequency samples the CFM module will spend to calculate the acceleration value. The default value (0)

Acceleration Calculation Time 5, 15, 25, 35 (bits 0009)

will calculate a rolling average of the previous five samples. Since the actual frequency sample time may vary, so does the Acceleration Calculation Time.

determine the acceleration value that, if exceeded, will activate the BTR Acceleration Alarm (word 4 & 5, bits 00 & 08).

Acceleration Alarm 9, 19, 29, 39

RANGE: 032,767

The CFM module will not calculate an acceleration if this acceleration value is zero.

4–15Configure the CFM Module

the minimum frequency and maximum sample time. All

Frequency Multiplier/Divisor 10, 20, 30, 40

Highest Allowable Frequency 8, 18, 28, 38

scale the returned frequency and acceleration to actual engineering units.

Frequency Multiplier must be < Frequency Divisor.

For each value RANGE: 1255 DEFAULT: 1

The scaled frequency/acceleration value can not be used to trigger any outputs (outputs triggered by frequency/acceleration are triggered by actual frequency/acceleration).

specify the highest frequency value allowed on the input channel. When this value is exceeded, the input channel's overspeed alarm will activate.

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4–16 Configure the CFM Module

Configure the Module

To configure the CFM module, you set the appropriate bits in the BTW instruction. You do this:

•through I/O Configuration software if you are using a PLC-5

family processor (see PLC-5 Programming Software I/O Configuration Manual, publication 6200-6.4.12, for supported

processors)

•by editing bits at the address of the BTW instruction

Using I/O Configuration Software

To configure the CFM module using I/O Configuration software, you enter the appropriate information on the CFM module edit screens. Use these documents to help you use I/O Configuration software:

Using

I/O Configuration Software

PLC5 Programming Software

I/O

Configuration

Software

What's Next

publication 62006.4.12

Setting Bits in the BTW Configuration Block

If you are not using the I/O configuration utility, edit the data file addresses in the BTW instruction to match your particular application. Use the word descriptions on pages 4–3 through 4–7 to help you edit the bits that apply to your application(s).

Interpret Module Status and Input Data

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Chapter

Interpret Module Status and Input Data

What This Chapter Contains

Understand the CFM Module's BTR Structure

Use this chapter to interpret module status and input data from the CFM module.

To interpret module status and input data See page

Understand The CFM Module's BTR Structure . . . . . . . . . . . .

BTR Word Assignments . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

Example  PLC5 processor Status and Input Data . . . . .

Your PLC processor gets data from the CFM module using BTR instructions in your ladder logic program. The CFM module transfers up to 41 words to the PLC processor’s data table file. The words contain module status and input data from each channel.

You should program a block transfer read length of zero (0). When a BTR of 0 is programmed, the CFM module will determine the correct number of words (41) to return.

For See page(s)

a general overview of the BTW configuration block 5-2 detailed descriptions of each word in the BTW configuration block 5-3 through 5-5 an example of a data table print out 5-6

5-1

5-6

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5–2 Interpret Module Status and Input Data

BTR Word Assignments

Word(s)

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

Block

ID & Resets

Header

Bit

Output Status & Diagnostics

3 Channel

Output Status

Channel 2

Mode

Indication

Channel 1

Channel 1 Status

Prover

Status

Overrange

Alarm

Overflow

Status

Overspeed

Alarm

Acceleration

Alarm

Channel 3 Status

Prover

Status

Overrange

Alarm

Channel 0 (words 614) Channel 1 (words 1523) Channel 2 (words 2432) Channel 3 (words 3341)

15, 24, 33

7, 16, 25, 34 Frequency (0120 ) MSD

8, 17, 26, 35

9, 18, 27, 36

10, 19, 28, 37

1, 20, 29, 38

12, 21, 30, 39

13, 22, 31, 40

14, 23, 32, 41

not used

Overflow

Status

Overspeed

Alarm

Input

Acceleration

Alarm

Channel Data

Percent of Full Scale (Rate % of High RPM value)

Frequency (0999) LSD

otal MSD (0999)

otal LSD (09,999)

Acceleration (rate of change of frequency)

Prover T

otal Count V

alue or Store Count V

alue or Store Count Value  LSD (09,999)

* Numeric values are in binary except for

Diagnostics

Error

Channel 0 Status

Prover Status

Overrange

Channel 2 Status

Prover Status

alue  MSD (0999)

(word 2, bits 0007)

Overrange

Words & Diagnostics

Channel 0

Alarm

Overflow

Status

Overflow

Status

Direction

Overspeed

Alarm

Overspeed

Alarm

Powerup

bit

Acceleration

Alarm

Acceleration

Alarm

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

word #

17716.5.99 - December 1995

not used

BTR Word Description Key

Bits

Description of what these bits are used for.

Mode(s) that use these bits.

Mode

abbreviations: Totalizer = T Nonresettable T

otalizer = NR

T Highresolution Frequency = HR Direction Sensor = DS

word 1

Header must be 0010.

word 2

BTR Word Descriptions

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

0010

VALUES: 1= no or invalid BTW

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

5–3Interpret Module Status and Input Data

Powerup Bit indicates if a valid BTW has occurred since powerup or since last switched from Program to Run mode.

0 = yes

word 3

Mode Indication for Channel 3

Indicates mode of operation that channel is currently running in.

word 4

Output Status reflects current operating state of outputs. b12 = Output 0 b13 = Output 1

VALUES: 0 = OFF 1 = ON

Error Words & Diagnostics displays invalid BTW word # (060 BCD). 99 = invalid BTW length.

b14 = Output 2 b15 = Output 3

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

Mode Indication for Channel 0

Mode Indication for Channel 2

Mode Indication for Channel 1

0 = unused channel 1 = Totalizer 3 = Highresolution Frequency (channels 0 & 1 or 2 & 3) 2 = Nonresettable Totalizer 4 = Direction Sensor (channels 0 & 1 or 2 & 3)

Channel 0Channel 1

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

Prover

Status

Overflow

Overrange

Alarm

Status

Acceleration

Overspeed

Alarm

Prover

Status

Overrange

Alarm

Overflow

Status

Acceleration

Overspeed

Alarm

word 5

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

Channel 2Channel 3

Overrange Alarm

on if the frequency is > than 100kHz (frequencies > 100kHz may not be accurately returned).

all

Overflow Status toggles between 0101 every time a rollover occurs. This bit is reset by BTW word 1 (bits 0407).

, NR

Prover Status indicates the current state of prover (value of bits in hex).

Overspeed Alarm

on if frequency is >

Highest Allowable Frequency

(BTW word 8, 18, 28, 38).

Acceleration Alarm

on if |acceleration value| is >

Acceleration Alarm Value

(BTW word 9, 19, 29, 39).

allall

0 = prover not selected 4 = prover is returning on reverse leg (bidirectional only) 1 = prover not running, but active 5 = prover is done with run (BTR word 13/14 contains prover count value) 2 = prover running  past the 1st switch in forward leg 6 = prover not active & new store count A 3 = prover is done with forward leg and returning at this time 7 = prover not active & new store count B

 intermediate value returned (bidirectional only)

if prover not active, these bits toggle 6767 every high transition of the gate

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5–4 Interpret Module Status and Input Data

word 5 (Channel 0)

word 6 (Channel 0) word 15 (Channel 1)

word 15 (Channel 1) word 25 (Channel 2)

word 24 (Channel 2) word 35 (Channel 3)

word 33 (Channel 3)

word 7 (channel 0) word 16 (channel 1) word 25 (channel 2) word 34 (channel 3)

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

Percent of Full Scale (Rate % of High RPM value)  the calculated frequency scaled by the Highest Allowable Frequency (BTW 8, 18, 28, 38) and then

0 = 0%

32, 767 ≥ 100%

% = BTR word 6,15,24,33 / 32,767

expressed as a number from 0 to 32,767.

T, NRT, HR

For example, if:

BTW word 5  bit 12, 4 x Highest Hertz = 1 (ON)

bit 15, Frequency in 10ths = 0 (OFF)

Percent Full Scale (BTR 6) = 32,767

BTW word 8  Highest Allowable Frequency = 21,750Hz BTR word 7 = 1 BTR word 8 = 1410

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

Frequency = 11,410Hz

Percent Full Scale (BTR 6) = 4,297

Frequency indicates the calculated frequency. RANGE: 0120,000 If

Frequency in 10ths (word 5,15,25,35  bit 15) is:

not set  MSD range = 012 x 10,000 / LSD range = 09,999 Example: If word 7 = 6 and word 8 = 532, Frequency = 6(10,000) + 532 = 60,532

set  MSD range = 0120 x 1,000 / LSD range = 09,999 x 0.10 Example: If word 7 = 6 and word 8 = 532, Frequency = 6(1,000) + 532(0.10) = 6,053.2

(21,750 x 4) / 11,410

MSD

 range depends on status of

Frequency in 10ths

(BTW word 5,15,25,35 bit 15) and mode of operation

all

word 8 (channel 0) word 17 (channel 1) word 26 (channel 2) word 35 (channel 3)

LSD  range depends on status of BTW Frequency in 10ths bit

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

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5–5Interpret Module Status and Input Data

word 9 (channel 0) word 18 (channel 1) word 27 (channel 2) word 36 (channel 3)

word 10 (channel 0)

word 10 (channel 0) word 19 (channel 1)

word 19 (channel 1) word 28 (channel 2)

word 28 (channel 2) word 37 (channel 3)

word 37 (channel 3)

word 11 (channel 0) word 20 (channel 1) word 29 (channel 2) word 38 (channel 3)

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

Total  the total counts registered by the input channel. Example: If word 9 = 93 and word 10 = 1234, Total = 93(10,000) + 1,234 = 931,234 RANGE: 0  9,999,999

T, NRT

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

Acceleration (rate of change of frequency)  the calculated acceleration value (Hz/s). RANGE: -32,767 to 32,767

all

MSD

 ranges from

0999 x 10,000

LSD  ranges from 09,999

word 12 (channel 0) word 21 (channel 1)

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

word 30 (channel 2) word 39 (channel 3)

If Bandwidth Limit is: ON  orientation and frequency can be sensed to 1/Minimum Frequency Sampling Time. Frequencies < 1/Minimum Frequency Sampling Time are reported as stopped.

OFF  direction can be sensed to 0.33Hz and frequencies < 1Hz are reported as 0.

word 13 (channel 0) word 22 (channel 1)

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

word 31 (channel 2) word 40 (channel 3)

Prover Total Count Value or Store Count Value  when Prover Run Initialize (BTW 1, bits 811) is:

enabled  the value returned is the prover count (intermediate and final run values).

not enabled  the value returned is the last count stored when the Gate input went low to high. These words are reset to 0 when Prover Run Initialize (BTW 1, bits 811) changes in bit state from a 0 to a 1.

T, NRT

word 14 (channel 0) word 23 (channel 1) word 32 (channel 2) word 41 (channel 3)

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

Direction indicates the current detected direction 0 = stopped of the input pulses in Direction Sensor modes. 1 = clockwise

2 = counterclockwise

MSD

 ranges from

0999 x 10,000

LSD  ranges from 09,999

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5–6 Interpret Module Status and Input Data

Example

 reading data from the CFM module

In this example, the CFM module:

•

has a constant input frequency of 729Hz fed to all channels

•

has input channels configured as follows:

CH 0 CH 1 CH 2 & 3

Operating Mode Minimum Frequency Sampling Time 50ms 250ms 10ms Highest Allowable Frequency 25000 10000 50000 Acceleration Alarm Value 3500 Acceleration Calculation Time 10 (every 10 frequency samples) Rollover Value 360000 Frequency Scaler Multiplier

Divisor

Frequency in 10ths 0.1Hz Bandwidth Limit 1/sample time Sampling Termination time or 200 counts

The

following data table is a printout from the PLC5 processor program example (page

(160) and BTR words (101141), in binary

1771CFM

Data T

Address 0 1 2 3 4 5 6 7 8 9

N22:0 0 8192 0 0 801 10 50 0 25000 3500

N22:10 1572 0 0 36 0 0 250 0 10000 0

N22:20 0 0 0 0 0 -4096 10 200 12500 0

N22:30 0 0 0 0 0 0 0 0 0 0

N22:40 0 0 0 0 0 0 0 0 0 0

N22:50 0 0 0 0 0 0 0 0 0 0

N22:60 0 0 0 0 0 0 0 0 0 0

N22:70 0 0 0 0 0 0 0 0 0 0

N22:80 0 0 0 0 0 0 0 0 0 0

N22:90 0 0 0 0 0 0 0 0 0 0

N22:100 0 8192 0 801 4 0 969 0 123 26

N22:110 2789 0 0 0 0 2392 0 730 62 2853

N22:120 0 0 0 0 477 0 7289 0 0 0

N22:130 0 0 0 0 0 0 0 0 0 0

N22:140 0 0 0 0 0 0 0 0 0 0

Sample PLC5 Program

able Report

Totalizer Nonresettable Totalizer Highresolution Frequency

6 36

3-4

). This printout shows the BTW words

, used to communicate with the CFM module.

24 May 1993 Page 1

PLC5/20 File CFMSAMPL

Data T

able File N22:0

What's Next

Publication

17716.5.99 - December 1995

roubleshoot

the CFM Module

Chapter

STATUS

Troubleshoot the CFM Module

What This Chapter

Use this chapter to troubleshoot the CFM module by interpreting the:

Contains

• status indicators

• diagnostic word in the BTR file

Status Indicators

Indicators If indicator Is ON Is OFF

ACTIVE

INPUTS (F0F3 & G0G3)

OUTPUTS (O0O3)

ACTIVE

INPUTS/OUTPUTS

F0 F1 F2 F3 G0 G1 G2 G3 O0 O1 O2 O3

STATUS S0 S1 S2 S3 S4 S5 S6 S7

FAULT

STATUS

FAULT

The CFM module provides these LED indicators:

a. Check FAULT LED  if on, follow the steps the CFM module is successfully receiving power and operational

a signal is present at the designated input terminal

the module has commanded an output on the output is off

Powerup Bit (BTR word 1, bit 00) is ON (=1)  BTW hasn't occurred since powerup, or invalid BTW, or PLC processor in Program mode

BTW is occurring

BTR is occurring

1. Turn off power to the I/O chassis

backplane and wiring arm.

2. Reseat the CFM module in the I/O

chassis.

3. Restore power to the I/O chassis

backplane and wiring arm.

Important: If the fault LED remains on,

there may be an internal problem. Contact your local AllenBradley representative for additional assistance.

listed under if FAULT is ON.

b. Check the power supply.

a signal is not present at the designated

input terminal

Powerup Bit (BTR word 1, bit 00) is OFF (=0) 

valid BTW has occurred since powerup or since

last switched from Program to Run mode

BTW is not occurring

BTR is not occurring

normal operation

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6–2 Troubleshoot the CFM Module

Diagnostics

word 1

Header (CFM module ID) must be 0010.

word 2

The CFM module returns diagnostics to the PLC processor in words one and two of the BTR file. These diagnostics give you the number of the word in the BTW configuration block that has caused an error to occur.

Important: In the event that there are multiple incorrect

BTW words, the CFM module only returns the first

incorrect word.

Diagnostic Words in the BTR File

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

0010

VALUES: 1= no or invalid BTW

0 = yes

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

Powerup Bit indicates if a valid BTW has occurred since powerup or since last switched from Program to Run mode.

What's Next

Output Status reflects current

operating state of outputs. b12 = Output 0 b13 = Output 1 b14 = Output 2 b15 = Output 3

To find out more about the CFM module:

See appendix For

VALUES: 0 = OFF 1 = ON

Specifications

Schematics

Error Words & Diagnostics displays invalid BTW word number (060 BCD). 99 = invalid BTW length

specifications on the CFM module

input and output circuit drawings

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17716.5.99 - December 1995

CFM module

Frequency

Frequency range

What This Appendix Contains

Frequency Accuracy

QRC / QRD module emulation

CFM module Frequency Frequency range configured for

QRC operation constant @ 12ms

QRD operation constant @ 1s

CFM module

Totalizer & Nonresettable Totalizer Mode 500ms

Highresolution Frequency (time only) Mode

Direction Sensor Mode not applicable

➀

Specified 1Hz is worst case  typical performance is expected to be better than

➁

In T

otalizer and Nonresettable T

twice the actual frequency) because the incoming pulses and sample time are not synchronized.

Specifications

This appendix contains the frequency accuracy and general specifications of the CFM module.

The following table lists typical application configurations and their associated frequency accuracy for the CFM module when used:

• to emulate a 1771-QRC or 1771-QRD module

• as a CFM module

Important: The accuracy in all configurations will vary with

sampling time

100ms

➁

1000ms

4ms

10ms

100ms

1000ms

otalizer modes, frequencies input slightly above 1/

(0120,000Hz)

0 -

6,001 -

14,001 -

0 -

6,001 -

0 -

11 -

2,001 -

18,001 

0 -

51 -

8,001 -

20,001 -

0 -

6,001 -

0 -

6,001 -

14,001 -

0 -

6,001 14,001 20,001 -

0 -

6,001 14,001 20,001 -

0 -

6,001 14,001 20,001 -

0 -

2,001 30,001 -

Appendix

input frequency, mode of operation and frequency sample time.

6,000 14,000 15,800

6,000

10,000

2,000 18,000

120,000

8,000 20,000

120,000

6,000

120,000

6,000

14,000 120,000

6,000 14,000 20,000

120,000

6,000 14,000 20,000

120,000

6,000 14,000 20,000

120,000

2,000 30,000

120,000

±1Hz.

Minimum Frequency Sampling Time

Maximum frequency error (Hz or %)

25°C 40°C 60°C

➀

±1Hz

➀

±1Hz

➀

±1Hz

➀

±1Hz

±0.080%

➀

±1Hz

±10Hz ±0.180% ±0.100%

➀

±1Hz

±2Hz

±0.03%

±0.025%

➀

±1Hz

±0.020%

➀

±1Hz

➀

±1Hz

±0.0150%

➀

±1Hz

➀

±1Hz

➀

±1Hz

±0.007%

➀

±1Hz

➀

±1Hz

➀

±1Hz

±0.005%

➀

±1Hz

➀

±1Hz

➀

±1Hz

±0.005%

➀

±1Hz ±0.550% ±2.500%

may result in an inaccurate frequency (approximately

➀

±1Hz

➀

±1Hz

±0.007%

➀

±1Hz

±0.090%

➀

±1Hz

±10Hz ±0.180% ±0.120%

➀

±1Hz

±2Hz

±0.03%

±0.0275%

➀

±1Hz

±0.025%

➀

±1Hz

➀

±1Hz

±0.020%

➀

±1Hz

➀

±1Hz ±0.007% ±0.007%

➀

±1Hz

➀

±1Hz ±0.007% ±0.007%

➀

±1Hz

➀

±1Hz ±0.007% ±0.007%

➀

±1Hz ±0.550% ±2.500%

±1Hz ±0.015% ±0.015%

±1Hz

±0.10%

±1Hz

±10Hz

±0.20%

±0.150%

±1Hz

±3Hz

±0.035%

±0.03%

±1Hz ±0.030%

±1Hz ±0.020% ±0.025%

±1Hz ±0.015% ±0.015% ±0.015%

±1Hz ±0.550% ±2.500%

➀

Publication

17716.5.99 - December 1995

SpecificationsA–2

General Specifications

Number of Input Channels

1771A1B, A2B, A3B, A3B1, A4B (series A and B)

Module Location

I/O chassis 1771AM1, AM2 I/O chassis with integral power supply, adapter

Maximum Count V

BTW Processing Time (worst case)

Module Scan Time

Maximum Input Frequency

Inputs per Channel

alue

0-9,999,999 (programmable)

5.5ms  on a configuration change

1.3-5ms (depending on configuration and frequency)

100kHz @ flowmeter Input (maximum frequency is 120kHz  100kHz @ gate input overrange occurs at 100kHz)

2 -

flowmeter input  used for all modes gate input  used in T

otalizer and Nonresettable

Totalizer modes

50mV200V ac peak  Magnetic Pickup

Input V

oltage

540V dc (TTL compatible) Bently 3300 5 & 8 mm  Proximity Pickups

Input Impedance

Number of Outputs

Maximum Output Of

Maximum Onstate V

fstate Leakage Current

oltage Drop

Output Control

Output V

oltage 5 to 40V dc, customer supplied

Output Current

Output Switching Time

Filtering (F0F3 inputs) 

Debouncing (G0G3 inputs) 

jumper selectable

software selectable

+24V dc Source

5KΩ ± 30% resistive

less than 300

µA @ 40V dc

0.6Ω x current

Any number of outputs are assignable to any of 4 channels. One turn-on" value and one turn-of

f" value per output.

1A per channel sourced out of module All outputs can be on simultaneously without derating.

outputs triggered by Total:

turn ON < 100µs; turn OFF < 100µs

all other turn ON and OFF times < 1ms

highspeed or lowpass filter jumper (filter = below 70Hz)

(approximate) between transitions with no minimum pulse

width  T

otalizer and Nonresettable T

ripple: ±

5%; noise: 240mV peaktopeak

otalizer modes only

Backplane Current 1A maximum

500V

between input and backplane

Isolation Voltage

Power Dissipation

1500V between output and backplane 500V

between isolated channels

1500V

between isolated outputs and gates

13W (maximum); 2W (minimum)

Thermal Dissipation 54.2 BTU/hr (maximum); 6.8 BTU/hr (minimum)

Input Conductors

Output Conductors

Environmental Operating Temperature Conditions Storage Temperature

Relative Humidity

Field Wiring Arm

Wiring Arm Screw Torque

Keying (lower backplane connector)

Agency Certification (when product or packaging is marked)

Wire Size Category Length

Wire Size Category

Belden 8761 Category 2

304.8m (1000ft)

Belden 8761 Category 1

➀

0 to 60oC (32 to 140oF)

-40 to 85oC (-40 to 185oF) 5 to 95% (without condensation)

40-terminal (cat. no. 1771-WN)

79 inchpounds

between 2 and 4 between 6 and 8

Class 1 Div 2 Hazardous

➁

Publication

17716.5.99 - December 1995

marked for all applicable directives

➀

Use

this conductorcategory information for planning conductor routing as described in the systemlevel installation manual.

➁

CSA certification Class I, Division 2, Group A, B, C, D or nonhazardous locations.

What This Appendix Contains

Input Circuits

Appendix

Schematics

Use this appendix to understand the internal logic of the CFM module.

Follow the wiring practices described in your system-level installation manual when wiring your I/O devices. This includes:

• routing conductors

• grounding practices

• use of shielded cables

The CFM module input logic consists of:

• flowmeter input circuits

• gate input circuits

-12V (F0 &F1)

-12V (F2 & F3)

Flowmeter Inputs

The flowmeter input circuit combines operational amplifier principles with solid state devices to provide constant logic pulses internal to the CFM module. The circuit is designed to interface with both active or passive sensor inputs by accepting any pulse output device (such as turbine flowmeter, magnetic pickup or digital pickup).

+12V +12V

R119

500mV level

R98

level

TTL (1.3V)

Input

RET

RV1

- proximity pickup

U26

R123

26.1kΩ

U22

R112 R109 R116

8.25kΩ 215kΩ 1kΩ

C72

4.7kΩ

C64

121

= COM (F0 & F1)

= COM (F2 & F3)

physical and electrical isolation

500V ac rms

+5V

U17

C62 R120

flowmeter jumpers:

70Hz

filter

C81

F0 F1 F2 F3

JPR20

JPR21

E6 C9

50mV

REF

C73

D11

U23

∞

R108

R115

JPR20 = ON for highspeed operation JPR21 = ON for filter operation

Publication

17716.5.99 - December 1995

SchematicsB–2

50mV threshold

Turbi

The signal:

must be ac

us be 00 a d 00

Turbi

()

Compatible with open collector

TTL

signal format with pulses riding on a fixed B

18V

Signal characteristics

50mV threshold

ne flowmeter or magnetic pickup (50mV142V ac rms) The signal:

• should be approximately sinusoidal

• must be ac

• must be > 100mV and < 400V

peaktopeak

500mV threshold

Trin

flwmtr r mnti i

ne flowmeter or magnetic pickup

k (500mV142V ac rms) The signal:

• should be approximately sinusoidal

• must be ac

• must be > 1V and < 400V

peaktopeak

1.3V threshold (TTL)

Compatible with open collector.

The signal should be dc pulses with width > 4us.

The TTL mode is compatible with TTL, 4000 series CMOS, and most 024V systems. The

mode in not compatible with any signal format with dc pulses riding on a fixed dc level > 1.3V.

12" V threshold (+24V RET)

This specialized mode is compatible with signal format with pulses riding on a fixed dc level > +1.3V.

Example

ently Nevada Proximity Pickup Series 3300 (5mm and 8mm) where the active" sensor signals are with a 5V offset.

e signal resides between 5



therefore, it passes through the threshold



of 12"V as referenced to the +24V dc RET.

Input

F0 F1 F2 F3

F0 RET

16 24 28 + turbine flowmeter or magnetic pickup

15 23 27 - turbine flowmeter or magnetic pickup

F1 RET F2 RET F3 RET

Input Return

Input

F0 F1 F2 F3

500mV  connect to each corresponding RET

+ turbine flowmeter or magnetic pickup

11 15 23 27 - turbine flowmeter or magnetic pickup

F0 RET F1 RET F2 RET F3 RET

Input Return

Input

12 16 24 28

F1 F2 F3

13 21 25

1.3V (TTL)  connect to each corresponding RET

+ logic circuit

15 23 27 - logic GND

F0 RET F1 RET F2 RET F3 RET

Input Return

Input

F0 F1 F2 F3

1212 16 24 28

20 20

+ proximity pickup (active sensor)

- proximity pickup (active sensor)

S0 RET S1 RET S2 RET S3 RET

Input Return

wiring

Publication

arm terminal number

17716.5.99 - December 1995

Signal threshold (500mV or 1.3V) is selected by jumpering the appropriate level to the appropriate RET.

Input

RET

R4 R2

470Ω 470Ω

Voltage Jumpers

330Ω

C51

JPR 6 JPR 7

E11 E11 E11

gate jumpers:

JPR6 = ON for 1240V dc JPR7 = ON for 512V dc

Schematics B–3

Gate Inputs

Gate inputs are used for running prover and store count values. Each gate is an electrically isolated circuit with a physical and electrical isolation of 1500V ac. There is one gate associated with each flowmeter input circuit (G0 corresponds to F0).

physical and electrical isolation

1500V ac rms

external device

R79

C55

R77

U12

+5V

C52

R87

G0 G1 G2 G3

To turn on a gate circuit, you must source current through the input resistors sufficient to turn on the opto-isolator in the circuit. If no connection is made to the pair of gate terminals, no current will flow through the photodiode of the opto-isolator and that gate will be OFF (the corresponding input status indicator is OFF).

The input current magnitude can be determined by the state of the gate jumper:

CASE A  gate jumper set for 512V dc operation (JPR 7 is ON)

gate input current = (gate input voltage - 2V➀)

330Ω

Examples

 If gate input voltage = 5V dc

gate input current = (5V - 2V)

330Ω

gate input current = 9mA

➁

 If gate input voltage = 12V dc

gate input current = (12V - 2V)

330Ω

gate input current = 30mA

➀

There is approximately a 2V drop across (Q1 + the photodiode).

➁

The operating range of the input is 510mA and Q1 functions as an overcurrent

protection circuit. If an open collector device with pullup is used, the value of the pullup must be added to the Ω value shown in the denominator

CASE B  gate jumper is set for 1240V dc operation (JPR 6 is ON)

gate input current = (gate input voltage - 2V➀)

1270Ω

Examples

 If gate input voltage = 5V dc

gate input current = (12V - 2V)

➁

gate input current = 8mA

1270

Ω

➁

 If gate input voltage = 40V dc

gate input current = (40V - 2V)

gate input current = 30mA

1270

➁

Ω

Publication 17716.5.99 - December 1995

SchematicsB–4

Output Circuits

The CFM module output logic consists of:

• discrete outputs

• dc to dc converters (24V dc power supplies)

Discrete Outputs

The CFM module’s outputs are comprised of isolated power MOSFETs. These devices operate in current sourcing mode, and are capable of delivering up to 1A (@ 5-40V dc).

physical and electrical isolation

1500V ac rms

+5V

OUTPUT 0

(OUTPUT 2)

OUTPUT 1

(OUTPUT 3)

U40

D25

C11 0

D29

C113

+5V

drive circuit

The CFM module contains two isolated pairs of output circuits. Customer supplied power (through terminal Vcc) to the power output transistors. 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). Diodes D32 and D33 protect the power output transistors from damage due to inductive loads.

Outputs Q6 and Q7 are thermally protected FET's 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.

, ranging from +5V to +40V dc, is connected internally

D26

R170

R171

D30

R172

R173

Customer V DC

Output 2

Customer V DC

#2 RET

Output 3

C109

C112

D27

D31

Output FET

Customer V DC

D32

D33

D28 43V

Output 0

Customer V DC

#1 RET

Output 1

If local electrical codes permit, outputs can be connected to sink current. This is done by connecting the load between the power supply + terminal and the customer Vcc terminal on the field wiring arm. The output terminal is then connected directly to ground (customer RET).

Important: This wiring method does not provide inductive load

protection for the power output transistors.

Publication

+5V

C22

C24 C25 C111

17716.5.99 - December 1995

DC to DC Converters (24V dc power supplies)

The CFM module provides two isolated 24V (±5%) power sources (each rated @ 12mA). Each power source can power one Bently Nevada 3300 (5mm or 8mm) Proximity Transducer.

physical and electrical isolation

500V ac rms

U39

C21

C26

C10 1

C10 8

+12V

-12V

C12

C11

C10 5

1 7

@ 12mA

24V

What This Appendix Contains

Appendix

Replace Your QRC Module

Use this appendix to install the CFM module as a replacement for the QRC module.

To replace your QRC module you See page

Check Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . .

Remove Your QRC Module . . . . . . . . . . . . . . . . . . . . . . . . . C-2

Set the Configuration Jumpers . . . . . . . . . . . . . . . . . . . . . . . C-3

Set the Module Operation Jumper . . . . . . . . . . . . . . . . . . C-3

Check the Input Channel Jumpers . . . . . . . . . . . . . . . . . . C-4

Install the CFM Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-5

Make Connections to the New Wiring Arm . . . . . . . . . . . . . . . C-6

Resume Normal Operation . . . . . . . . . . . . . . . . . . . . . . . . . . C-8

Edit Your Ladder Logic Program . . . . . . . . . . . . . . . . . . . C-8

Read Data From the CFM Module . . . . . . . . . . . . . . . . . . C-9

Interpret Status Indicators . . . . . . . . . . . . . . . . . . . . . . . . C-10

Additional Feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

C-1

C-10

What the CFM Module Does

Check Power Requirements

Important: We assume that you are using a QRC module in your

existing system and that you are familiar with I/O module installation/removal procedures.

The CFM (QRC) module, interfaces PLC processors with magnetic pickups, single-channel shaft encoders or turbine flowmeters.

When configured for QRC operation, the CFM (QRC) module calculates the frequency, beginning on the leading edge of a pulse, for 12-18ms.

The CFM (QRC) module is generally compatible with, but does not require the use of, turbine flowmeter signal preconditioning modules. It provides rate data in 2’s complement binary format to the PLC processor’s data table through block data transfers. Rates as high as 15.8kHz are supported.

ATTENTION: The maximum current drawn by the CFM (QRC) module is 1.0A. This current (1.0A) is

0.25A greater than the maximum current drawn by your QRC module (0.75A).

Consider the power usage of all modules in the I/O chassis to prevent overloading either the chassis backplane or power supply.

Publication

17716.5.99 - December 1995

Replace Your QRC ModuleC–2

Remove Your QRC Module

Detach and remove wiring arm (1771WG) from

the horizontal bar at the bottom of the I/O chassis.

Remove the QRC module from the I/O chassis.

ATTENTION:Remove power from the 1771 I/O chassis backplane and wiring arm before you remove

your QRC module. Failure to remove power from the backplane could cause:

•injury

•equipment damage due to unexpected operation

•degradation of performance

wiring arm

1771WG

remove

horizontal bar

17643

1771A1B, A2B, A3B, A3B1, A4B I/O chassis 1771A1B, A2B, A3B1, A4B Series B I/O chassis

locking

card guides

tab

locking bar pin

QRC module

Pull on the QRC module to slide it out of the I/O chassis.

locking bar

card guides

QRC module

At power-up, the active and fault indicators are on. An initial module self-check occurs. If there is no fault, the fault indicator turns off. See page 6–1 for information on interpreting the status indicators.

19809

Publication

17716.5.99 - December 1995

Replace Your QRC Module C–3

Set the Configuration Jumpers

You check and/or set these jumpers:

• module operation jumper

• input channel jumpers

Set the Module Operation Jumper

To use the CFM module as a replacement for a QRC module, set the operation jumper in the QRC position (default setting = CFM position).

CFM module

CFM QRD

QRC

19807

Publication

17716.5.99 - December 1995

Replace Your QRC ModuleC–4

Check the Input Channel Jumpers

The CFM (QRC) module has user-selectable jumpers for each input channel. These jumpers consist of one each:

• flowmeter jumpers (F0–F3) - set for low-pass filter or

high-speed operation

• gate jumpers (G0–G3) — set for +5-12V or +12-40V operation

Remove the four screws securing the side cover

to the module and remove the covers.

The CFM (QRC) module is configured for high-speed operation. Before installing your CFM (QRC) module, make sure the input channel jumpers are in their default positions.

Make sure the input channel jumpers➀ are in the default

positions shown below:

➁

FILTER

HIGH

SPEED

flowmeter jumpers

5-12V

12-40V

gate jumpers

Publication

17716.5.99 - December 1995

19805

➀

Jumpers

are shown in default settings.

➁

In the filter position, the module will not see frequencies above 70Hz.

Reposition the cover and secure with

the fours screws removed in step 1.

19806

19813

Install the CFM Module

Place the CFM (QRC) module in the card guides on the top and

bottom of the slot that guide the module into position.

Important: Apply firm even pressure on the module to seat it into its backplane connector.

1771A1B, A2B, A3B, A3B1, A4B I/O chassis 1771A1B, A2B, A3B1, A4B Series B I/O chassis

locking

card guides

tab

Replace Your QRC Module C–5

locking

bar pin

locking bar

card guides

CFM (QRC) module

CFM (QRC) modu

Snap the chassis latch over the top of the module to secure it.

Swing the chassis locking bar down into place to secu the modules. Make sure the locking pins engage.

Attach the wiring arm (1771WN) to the horizontal

bar at the bottom of the I/O chassis.

The wiring arm pivots upward and connects with the module so you can install or remove the module without disconnecting the wires.

remove

horizontal bar

install

wiring arm

1771WN

17643

Publication

17716.5.99 - December 1995

Replace Your QRC ModuleC–6

Make Connections to the New Wiring Arm

1 2 3 4 5 6 7

(+) Magnetic pickup and shield Channel A

(-) Magnetic pickup

9 10 11 12 13

(+) Magnetic pickup and shield Channel B

(-) Magnetic pickup

Overspeed solid state relay Channel A 16 17 18

Overspeed solid state relay Channel B 19 20 21

Solid state relay common

Connect your I/O devices to the 40-terminal field wiring arm (cat. no. 1771-WN) shipped with the CFM module. Use the wiring example on page C–7 for additional assistance on connecting your devices.

NEW wiring arm (1771WN)OLD wiring arm (1771WG)

Even Numbered T

Customer

V DC #1 RET (Outputs 0 &1 RET)

erminals 240

F0 Input

F2 Input

Output 0

Odd Numbered T

2 4 6

8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40

1 3 5 7 9

F0 RET 13 15 17 19 21 23

F2 RET 25 27 29 31 33

Customer V DC #1 (5 to 40V) 35

Output 1 37 39

erminals 139

18322

Overspeed 1ms of frequency calculation.

outputs turned on within

actual wiring runs in this direction

The sensor cable must be shielded. The shield:

• must extend the length of the cable, but be connected only

at the 1771 I/O chassis

• must extend up to the point of termination

Important: The shield should extend to the termination point,

exposing just enough cable to adequately terminate the inner conductors. Use heat shrink or another suitable insulation where the wire exits the cable jacket.

10689I

Publication

17716.5.99 - December 1995

Wiring Example

ATTENTION: Pins15 & 18 (on the QRC module) are switching negative (–) while pins 34 & 35

(on the CFM module) are switching positive (+). Please take this into consideration when rewiring

your system.

Replace Your QRC Module C–7

QRC module CFM module

shield

(+)

turbine

flowmeter

magnetic pickup

shield

turbine flowmeter

magnetic pickup

channel A

(+)

external dc

power supply

(-)

(+)

(-)

overrange alarm

➀

For new installations, terminate the shields at the chassis. While not recommended, existing installations can continue to terminate the shields at the return (RET) terminal.

➀

(+)

turbine flowmeter

(-)

(+)

(-)

overrange alarm

magnetic pickup

turbine flowmeter

magnetic pickup

channel A

(-)

external dc

power supply

(+)

➀

Publication

17716.5.99 - December 1995

Replace Your QRC ModuleC–8

Resume Normal Operation

PLC5 Program Example

The module to the PLC processor. This data is stored at N23:1. The BTR control file, starting at n23:60, is 5 words long.

Block transfer instructions use one binary file in a data table section for module location and other related data. The block transfer data file stores data that you want transferred from the CFM (QRC) module (when programming a BTR). The address of the block transfer data files are stored in the block transfer control file.

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 required for every module.

CFM (QRC)

CFM (QRC) BTR EN Bit

N23:60

The CFM module, configured for QRC module emulation, operates as a QRC module. Use the following section for reference on how the CFM (QRC) module operates.

Important: The CFM module has 50mV sensitivity. This is

different than the QRC module, which had 20 to 300mV sensitivity, depending on the hardware level.

Edit Your Ladder Logic Program

To initiate communication between the CFM module and your PLC processor, you must enter block transfer instructions into your ladder logic program. Enter the following rung to establish communication between the CFM module and your PLC processor.

module is located in rack 0, I/O group 1, slot 0. There are 3 words of data sent from the CFM (QRC)

CFM (QRC) BTR CONTROL FILE

BTR

BLOCK TRANSFER READ Rack Group Slot Control Block Data File Length

N23:60

N23:1

NContinuous

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17716.5.99 - December 1995

Replace Your QRC Module C–9

BTR

Read Data From the CFM Module

When configured for QRC module emulation, BTR programming moves three words from the CFM module to the PLC processor’s data table. The following BTR assignments apply when the CFM

module is configured for QRC module emulation.

BTR

Word

2 3

word 1

word 2 (ratemeter A)

Bit

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

Block

Header

Input Channel Rate

Rate of Ratemeter A Rate of Ratemeter B

*ALL numeric values are in binary*

BTR Word Descriptions

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

00000000 00010111

Header

will

be 7001 Hex or 28,673 binary. Identifies the

module as a CFM (QRC) module.

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

Rate  indicates the calculated rate. RANGE: 015,800Hz binary

Rates: 0169Hz are reported as zero

17015,800Hz are reported as calculated > 15,800Hz are reported as 15,800

The rates in words 2 & 3 are updated every 13.5ms20ms maximum. The greater the frequency, the faster the

update time. The accuracy of the returned rate is ±1Hz.

word 3 (ratemeter B)

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

Publication

17716.5.99 - December 1995

Replace Your QRC ModuleC–10

O0 O1 O2 O3

STATUS

Interpret Status Indicators

Indicators

If indicator

ACTIVE

INPUTS (F0 & F2)

ACTIVE

INPUTS/OUTPUTS

F0 F1 F2 F3

STATUS

S1 S2 S3

FAULT

G0 G1 O0 O1 O2 O3

S0 S4 S5 S6 S7

OUTPUTS➁ (O0 & O1)

STATUS S3 BTR is occurring BTR is not occurring

FAULT

➀

All other LED'

➁

Outputs

s are OFF in normal operation.

are not active if PLC processor is faulted or in Program mode.

➀

Is ON Is OFF

a. Check FAULT LED  if on, follow the

the CFM module is receiving power and operational

F0 - flashes with pulses at Channel A F2 - flashes with pulses at Channel B

steps listed under if FAULT is ON.

b. Check power supply LEDs.

a signal is not present at the designated input terminal (low)

O0 - indicates Channel A frequency

is ≥ 15,800Hz

O1 - indicates Channel B frequency

the output is off

is ≥ 15,800Hz

1. Turn off power to the I/O chassis backplane and wiring arm.

2. Reseat the CFM (QRC) module in the I/O chassis.

3. Restore power to the I/O chassis backplane and wiring arm.

normal operation

Important: If the fault LED remains on, there may be an internal problem. Contact your local AllenBradley representative for additional assistance.

Additional Feature

When you replace your existing QRC module with the CFM module, you can set input channel jumpers for:

• TTL inputs (5-40v dc)

• 500mV ac sensitivity for improved noise immunity

For additional information on setting the input channel jumpers, see:

Install the CFM Module

Publication

17716.5.99 - December 1995

What This Appendix Contains

Appendix

Replace Your QRD Module

Use this appendix to install the CFM module as a replacement for the QRD module.

To replace your QRD module you See page

Check Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-2

Remove Your QRD Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-2

Set the Configuration Jumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . D-3

Set the Module Operation Jumper . . . . . . . . . . . . . . . . . . . . . . D-3

Check the Input Channel Jumpers . . . . . . . . . . . . . . . . . . . . . . D-4

Install the CFM (QRD) Module . . . . . . . . . . . . . . . . . . . . . . . . . . . D-5

Make Connections to the New Wiring Arm . . . . . . . . . . . . . . . . . . . D-6

Resume Normal Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-8

Edit Your Ladder Logic Program . . . . . . . . . . . . . . . . . . . . . . . D-8

Read Data From the CFM Module . . . . . . . . . . . . . . . . . . . . . . D-9

Reset Total and Overflow Flags . . . . . . . . . . . . . . . . . . . . . . . . D-10

Interpret Status Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-11

Additional Feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

D-11

What the CFM Module Does

Important: We assume that you are using a QRD module in your

existing system and that you are familiar with the I/O module installation/removal procedures.

The CFM (QRD) module interfaces PLC processors with magnetic pickups, single channel shaft encoders, turbine flowmeters, or any source of TTL pulses.

When configured for QRD operation, the CFM (QRD) module calculates the frequency once per second, independent of the pulse edges.

The CFM (QRD) module is generally compatible with, but does not require the use of, turbine flowmeter signal preconditioning modules. It provides rate and count data in 2’s complement binary format to the PLC processor’s data table through block data transfers.

Rates as high as 10.0kHz and counts as large as 32,767 are supported. At overflow, the count continues from zero and an overflow flag is set. The overflow flag can be reset by the ladder logic. In addition, the PLC processor can reset any or all counts directly.

Important: Input frequencies > 30.0kHz may return unpredictable

results in the BTR file.

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17716.5.99 - December 1995

Replace Your QRD ModuleD–2

Check Power Requirements

Remove Your QRD Module

Detach and remove wiring arm (1771WG) from

the horizontal bar at the bottom of the I/O chassis.

ATTENTION: The maximum current drawn by the CFM(QRD) module is 1.0A. This current (1.0A) is

0.5A greater than the maximum current drawn by your QRD module (0.5A).

Consider the power usage of all modules in the I/O chassis to prevent overloading either the chassis backplane or power supply.

ATTENTION: Remove power from the 1771 I/O chassis backplane and wiring arm before you remove your QRD module. Failure to remove power from the backplane could cause:

• injury

• equipment damage due to unexpected operation

• degradation of performance

wiring arm

horizontal bar

Remove the QRC module from the I/O chassis.

1771A1B, A2B, A3B, A3B1, A4B I/O chassis 1771A1B, A2B, A3B1, A4B Series B I/O chassis

locking

tab

card guides

QRC module

Pull on the QRC module to slide it out of the I/O chassis.

remove

locking bar pin

locking bar

card guides

1771WG

QRC module

19809

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17716.5.99 - December 1995

Replace Your QRD Module D–3

Set the Configuration Jumpers

You check and/or set these jumpers:

• module operation jumper

• input channel jumpers

Set the Module Operation Jumper

To use the CFM module as a replacement for a QRD module, set the operation jumper in the QRD position (default setting = CFM position).

CFM module

CFM

QRC

QRD

19807

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17716.5.99 - December 1995

Replace Your QRD ModuleD–4

Check the Input Channel Jumpers

The CFM (QRD) module has user-selectable jumpers for each input channel. These jumpers consist of one each:

• flowmeter jumpers (F0–F3) - set for low-pass filter or

high-speed operation

• gate jumpers (G0–G3) — set for +5-12V or +12-40V operation

The CFM (QRD) module is configured for high-speed operation. Before installing your CFM (QRD) module, make sure the input channel jumpers are in their default positions.

Remove the four screws securing the side cover

to the module and remove the covers.

19805

Make sure the input channel jumpers

positions shown below:

➁

FILTER

HIGH

SPEED

flowmeter jumpers

➀

Jumpers

are shown in default settings.

➁

the filter position, the module will not see

frequencies above 70Hz.

➀

are in the default

gate jumpers

5-12V

12-40V

19806

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Reposition the cover and secure with

the fours screws removed in step 1.

19813

Install the CFM Module

Place the CFM (QRD) module in the card guides on the top and

bottom of the slot that guide the module into position.

Important: Apply firm even pressure on the module to seat it into its backplane connector.

1771A1B, A2B, A3B, A3B1, A4B I/O chassis 1771A1B, A2B, A3B1, A4B Series B I/O chassis

Replace Your QRD Module D–5

locking

tab

card guides

Snap the chassis latch over the top of the module to secure it.

Attach the wiring arm (1771WN) to the horizontal

bar at the bottom of the I/O chassis.

The wiring arm pivots upward and connects with the module so you can install or remove the module without disconnecting the wires.

locking bar

locking bar pin

card guides

CFM (QRD) module

Swing the chassis locking bar down into place to secure the modules. Make sure the locking pins engage.

19809

wiring arm

1771WN

horizontal bar

install

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17716.5.99 - December 1995

Replace Your QRD ModuleD–6

Make Connections to the New Wiring Arm

not

used

not used

Channel 1 +

Channel 1 -

shield

Channel 2 +

Channel 2 -

shield

Channel 3+

Channel 3 -

shield

Channel 4 +

Channel 4 -

shield

not used

TTL

not used

Channel 3, 4 level

Channel 1, 2 level

not used

Connect your I/O devices to the 40-terminal field wiring arm (cat. no. 1771-WN) shipped with the CFM module. Use the wiring examples on page D–7 for additional assistance on connecting your devices.

NEW wiring arm (1771WN)OLD wiring arm (1771WG)

Even Numbered T

erminals 240

F0 Input

F1 Input

F2 Input

F3 Input

Odd Numbered T

11 13 15 17 19 21 23 25 27 29 31 33 35 37 39

1 3 5 7 9

F0 (TTL) F0 RET F1 (TTL) F1 RET

F2 (TTL) F2 RET F3 (TTL) F3 RET

2 4 6

8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40

erminals 139

➀

18322

actual wiring runs in this direction

The sensor cable must be shielded. The shield:

• must extend the length of the cable, but be connected

only at the 1771 I/O chassis

• must extend up to the point of termination

Important: The shield should extend to the termination point,

exposing just enough cable to adequately terminate the inner conductors. Use heat shrink or another suitable insulation where the wire exits the cable jacket.

➀

To use a channel in TTL, jumper the appropriate TTL pin to the appropriate

RET. To use Channel 1 in TTL, jumper pin 9 to pin 11.

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17716.5.99 - December 1995

Wiring Examples

Replace Your QRD Module D–7

wiring for magnetic pickups or flowmeters

wiring for active TTL drivers

QRD module CFM module

(+)

shield

(-)

(+)

(-)

(+)

(-)

(+)

(-)

turbine

flowmeter

turbine

flowmeter

turbine

flowmeter

turbine

flowmeter

TTL channel 1

TTL channel 2

logic

➁

(-)

turbine

flowmeter

(+)

(-)

turbine

flowmeter

(+)

(-)

turbine

flowmeter

(+)

(-)

turbine

flowmeter

(+)

ground channel 0

TTL F0

➀

shield

logic ground

TTL channel 3

TTL channel 4

shield

TTL

channel 3 & 4 level

logic

ground channel 1

➁

logic ground channel 2

➁

logic ground channel 3

➁

TTL F1

TTL F2

TTL F3

channel 1 & 2 level

➀

To use a channel in TTL, jumper the appropriate TTL pin to the appropriate RET.

To use Channel 1 in TTL, jumper pin 9 to pin 11.

Signal types can be mixed in any combination on the CFM module.

➁

For new installations, terminate the shields at the

chassis. While not recommended, existing installations can continue to terminate the shields at the return (RET) terminal.

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17716.5.99 - December 1995

Replace Your QRD ModuleD–8

Resume Normal Operation

Program Example

The module to the PLC processor

Block transfer instructions use one binary file in a data table section for module location 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 address of the block transfer data files are stored in the block transfer control file.

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 required for every module.

CFM (QRD)

The CFM module, configured for QRD module emulation, operates as a QRD module. Use the following section for reference on how the CFM (QRD) module operates.

Edit Your Ladder Logic Program

To initiate communication between the CFM (QRD) module and your PLC processor, you must enter block transfer instructions into your ladder logic program. The following program example illustrates the minimum programming required for this communication to take place.

module is located in rack 0, I/O group 1, slot 0. There are 9 words of data sent from the CFM (QRD)

CFM (QRD) BTR EN BIT

N23:50

. This data is stored at N23:21. The BTR control file, starting at n23:50, is 5 words

CFM (QRD) BTR CONTROL FILE

CFM (QRD)

EN BIT

BTW

N23:55

BTR BLOCK TRNSFR READ

RACK GROUP SLOT CONTROL BLOCK0N23:50 DATA FILE LENGTH

N23:21

NCONTINUOUS

long.

The to the CFM (QRD) module. This data is stored at N23:1. The BTR control file, starting at n23:55, is 5 words long.

Note that the BTW is switch selectable, and its length is one word. The block transfer should only be sent once unless the ladder intelligently sets and clears the reset bits within the block transfer data. As an example, the ladder might set the reset bit at the time of overflow. If the block transfer is sent continuously and the reset bits contained within the block transfer data are simply left set to 1", the transfers will constantly be resetting the totalizer(s) and/or overflow flags of the specified channels.

CFM (QRD) module is located in rack 0, module group 1, slot 0. There is 1 word of data

CFM CONTROL FILE

CFM (QRD) BTR EN BIT

N23:50

CFM (QRD) BTW

EN BIT

N23:55

BTR BLOCK TRNSFR WRITE

RACK GROUP SLOT CONTROL BLOCK0N23:55 DATA FILE LENGTH

sent from the PLC processor

(QRD)

BTW

N23:1

NCONTINUOUS

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17716.5.99 - December 1995

Replace Your QRD Module D–9

BTR

Read Data From the CFM Module

When configured for QRD module emulation, BTR programming moves nine words from the CFM module to the PLC processor’s data table. The following BTR assignments apply when the CFM

module is configured for QRD module emulation.

BTR

Word

word #

Bit

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

Block

ID & Channel Status

Header

Overflow

Status

Input

Overrange Alarm

Channel Data

Error Code

Frequency on Channel 1 (010,000)

Total on Channel 1 (032,767)

Frequency on Channel 2 (010,000)

Total on Channel 2 (032,767)

Frequency on Channel 3 (010,000)

Total on Channel 3 (032,767)

Frequency on Channel 4 (010,000)

Total on Channel 4 (032,767)

*ALL numeric values are in binary*

BTR Word Description Key

Bits

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

Description of what these bits are used for.

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word 1

Replace Your QRD ModuleD–10

BTR Word Descriptions

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

0001.

Header must be 0001 Identifies the module as a CFM (QRD) module.

word 5 (channel 0)

word 2 (channel 1) word 15 (channel 1)

word 4 (channel 2) word 25 (channel 2)

word 6 (channel 3) word 35 (channel 3)

word 8 (channel 4)

word 5 (channel 0)

word 3 (channel 1) word 15 (channel 1)

word 5 (channel 2) word 25 (channel 2)

word 7 (channel 3) word 35 (channel 3)

word 9 (channel 4)

Overflow Status on if rollover has occurred (counter has exceeded maximum value of 32,767 and rolled over to 0). This can only be reset by BTW

Overflow Reset.

b08 = Channel 1 b10 = Channel 3 b09 = Channel 2 b11 = Channel 4

Overrange Alarm

on if the frequency is > 10.0kHz. Frequency will be reported as 0.0Hz and count will be reset to 0. b04 = Channel 1 b06 = Channel 3 b05 = Channel 2 b07 = Channel 4 VALUES: 0 = frequency < overrange value

1 = frequency ≥ overrange value

VALUES: 0 = rollover has not occurred

1 = rollover has occurred

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

Frequency  indicates the calculated frequency for the input channels.

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

Total  the total counts registered by the input channel.

RANGE: 010,000Hz Frequency = 0 if Overrange Alarm = 1 (is ON).

RANGE: 032,767 Total = 0 if Overrange Alarm = 1 (is ON).

Error Code displays error code hex value: 0 = Valid Data 2 = Block Transfer Syntax Error:

BTW word 1, bits 08-15 any bit is ON (= 1)

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

word 1

0000. 0000.

All of these bits must be OFF (= 0).

If any bit is ON, BTR word 1, bits 0003 will display an error code of 2 (hex value).

Reset Total and Overflow Flags

Any or all of the totalizers and overflow flags can be reset using a BTW command sent to the CFM module from the PLC processor. The BTW data word can be changed through the ladder logic, or by editing the data table.

BTW Word Description

Total Reset

Overflow Reset

reset the overflow flag (these bits are level sensitive upon receipt of BTW). b04 = Channel 1 b06 = Channel 3 b05 = Channel 2 b07 = Channel 4

reset the total count (these bits are level sensitive). b00 = Channel 1 b02 = Channel 3 b01 = Channel 2 b03 = Channel 4 VALUES: 0 = not reset 1 = reset

VALUES: 0 = not reset 1 = reset

➀

Resetting the total count will automatically reset its respective overflow flag(s).

Continuously doing BTW's with T

otal Reset

= 1 (reset) will affect the accuracy of the frequency.

➀

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17716.5.99 - December 1995

Interpret Status Indicators

Replace Your QRD Module D–11

Indicators

➀

All other LED'

ACTIVE

INPUTS/OUTPUTS

F0 F1 F2 F3 G0 G1 G2 G3 O0 O1 O2 O3

STATUS

S1 S2 S3

S4 S5 S6 S7

FAULT

s are OFF in normal operation.

If indicator

ACTIVE

INPUTS (F0  F3)

STATUS S1

FAULT

➀

Is ON Is OFF

the CFM module is successfully receiving power and operational

F0 - flashes with pulses at Channel 1 F1 - flashes with pulses at Channel 2 F2 - flashes with pulses at Channel 3 F3 - flashes with pulses at Channel 4

BTW invalid (BTW word 1, bits 0815) 0 0

BTW is occurring

BTR is occurring

frequency > 10.0kHz (overrange) on

any channel

1. Turn off power to the I/O chassis

backplane and wiring arm.

2. Reseat the CFM module in the I/O chassis.

3. Restore power to the I/O chassis backplane and wiring arm.

Important: If the fault LED remains on,

there may be an internal problem. Contact your local AllenBradley representative for additional assistance.

a. Check FAULT LED  if on, follow the

steps listed under if FAULT is ON.

b. Check power supply.

a signal is not present at the designated input terminal

BTW is valid

BTW is not occurring

BTR is not occurring

all frequencies within operating range

normal operation

Additional Feature

When you replace your existing QRD module with the CFM module, you can set input channel jumpers for:

• 500mV ac sensitivity for improved noise immunity

• frequencies > 70Hz (flowmeter filter jumpers)

For additional information on setting the input channel jumpers, see:

Install the CFM Module

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17716.5.99 - December 1995

What This Appendix Contains

Configure the CFM Module

Appendix

Using I/O Configuration Software

Use this appendix along with the PLC-5 Programming Software, I/O Configuration Software manual (publication 6200-6.4.12) to

configure the CFM module using I/O Configuration software.

To configure the CFM module, you use these screens:

• Block Transfer Data screen

• Channel Setup screen

• Output Setup screen

• Monitor screen

Choose one:

a b

I/O Module

System Overview

Edit

Data T

ables

You cannot edit the information on this screen.

I/O Module

System Overview

Edit

Channel Edit

BT Data Tables

System Overview

BT Data Tables

I/O Module

Monitor

Block Transfer Data Screen

Use the Block Transfer Data screen to display an image of the PLC processor data tables for the CFM module.

1771–CFM Series A Block Transfer Data Rack–Group–Module: 0–0–0

Configuration Data (BTW) Input Data/Status (BTR)

N7:10 12032 17425 12561 8451 –28572 N7:100 8192 16384 N7:102 8451 0 N7:15 10 0 15000 2000 0 N7:104 21712 23 N7:106 0 430 N7:20 0 0 0 0 0 N7:108 0 0 N7:110 0 0 N7:25 0 0 0 0 0 N7:112 0 0 N7:114 0 0 N7:30 0 0 0 0 2048 N7:116 0 0 N7:118 0 0 N7:35 1000 0 0 5000 0 N7:120 0 0 N7:122 0 4232 N7:40 1 2 0 0 0 N7:124 1 5499 N7:126 446 4049

Press arrow keys or PgUp/PgDn to see more data.

Rem RUN mod 1 of 1 Addr#42:CFM4B Change I/O Channel Output Monitor Change Display Mode Ovrview Setup Setup Radix Symbols F1 F2 F3 F4 F5 F6 F7

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Using I/O Configuration SoftwareE–2

Shows current values for each channel (these values reflect the data received the last time a BTR was completed).

The PLC processor must be in Run mode if you want to receive current data from the CFM module.

Shows current programming for each channel and lets you change the channel programming.

Fields inapplicable in the programmed channel mode are shown as dashes and cannot be edited.

Choose one:

a b

I/O Module

System Overview

Edit Channel Setup

Output Setup

or Monitor or BT Data

F3F2

Ladder Editor

Main Menu

Cursor to BT instruction

Edit

I/O Edit

Use PageUp or PageDown to move through the channel setup screens.

Channel Setup Screen

1771–CFM Series A Channel Setup Rack–Group–Module: 0–0–0 channel 0 channel 1 channel 2 channel 3 current values: channel mode high–res freq (not used) totalizer noreset totzr frequency 43.0 15,487 258 total counts ––– 3,881,128 1,111,111 acceleration 0 359 0 –––––––––––––––––––– channel 0 channel 1 channel 2 channel 3 new channel mode high–res freq (not used) totalizer noreset totzr

minimum sample time 10 ms 1000 ms 0 = 100 ms for frequency acceleration 2,000 5,000 disabled alarm value accel sample time 100 rolling avg ––– (freq intervals) highest allowed 60,000 0 0 frequency

Press F9(Toggle) to change channel mode.

Rem RUN mod 1 of 1 Addr#42:CFM4B Change I/O Output Monitor BT Data Default Toggle Accept Mode Ovrview Setup Tables Config F1 F2 F4 F5 F6 F8 F9 F10

–––––––––––––––––––– channel 0 channel 1 channel 2 channel 3 lowest measurable 1 Hz ––– ––– frequency

F10

end sample on time only ––– ––– counts to end ––– ––– ––– sampling frequency resolution 0.1 Hz ––– ––– frequency scalers 1/1 1/1 1/60 (multiply/divide)

Press F9(Toggle) to change bandwidth limit.

Rem RUN mod 1 of 1 Addr#42:CFM4B Change I/O Output Monitor BT Data Default Toggle Accept Mode Ovrview Setup Tables Config F1 F2 F4 F5 F6 F8 F9 F10

–––––––––––––––––––– channel 0 channel 1 channel 2 channel 3 scalers for total ––– 1/2 1/1 (multiply/divide) rollover value ––– 0 5,000,000 tied to outputs 0,2,3 1 none reset total ––– disabled ––– reset overflow ––– disabled disabled start prover ––– enabled enabled prover type, uni ––– bi uni or bidirectional

Enter rollover value (0 to 9,999,999). > Rem RUN mod 1 of 1 Addr#42:CFM4B Change I/O Output Monitor BT Data Default Accept Mode Ovrview Setup Tables Config F1 F2 F4 F5 F6 F8 F10

Publication

Press (F3)  Channel Setup to configure individual channels or (F10) - Accept to accept your edits. We suggest that you complete your edits on all screens before accepting the edits.

17716.5.99 - December 1995

Using I/O Configuration Software E–3

Current values Displays In mode(s)

channel mode the current channel mode as returned in the BTR data file by the module frequency the current scaled frequency total counts the scaled total counts

all

if acceleration alarm value

acceleration

0 0, value = the acceleration (change in scaled frequency per second)

all

= 0, value = 0

Current programming You In mode(s)

press (F9)  Toggle to select a mode of operation for the input channel:

❯ not used ❯ totalizer ❯ noreset totzr (nonresettable totalizer)

new channel mode

❯ high-res freq (highresolution frequency) ❯ direction (direction sensor)

all

Important: The Highresolution frequency and Direction Sensor modes each

occupy two channels and are selected via channel 0 (channel 1 unused) or channel 2 (channel 3 unused).

enter the minimum time value the CFM module will spend to determine frequency

minimum sample time

for frequency

RANGE: 4-1000ms (03 = DEFAULT) DEFAULT (if you enter 0): 100ms (T, NRT) 4ms (HR, DS)

In Direction Sensor, this time is used to determine the maximum sample time and

NRT, HR

minimum frequency and does not actually determine the time period.

acceleration alarm

value

enter an alarm value of 0 to 32,767 DEFAULT (if you enter 0): all acceleration features of the module are disabled

all

only when the acceleration alarm value 0 0

accel sample time (freq intervals)

enter a number to determine how many frequency intervals (1 to 750) should be spanned in computing acceleration DEFAULT (if you enter 0): acceleration calculated as rolling average over 5

NRT, HR

samples enter a value up to 120,000Hz for the overspeed threshold

DEFAULT (if you enter 0): 120,000Hz

highest allowed

frequency

The highest allowed frequency is in Hz, not in scaled frequency units.

For example, if you select 120,000Hz as the highest allowed frequency and select

NRT, HR

frequency scalers of 1/60, the module sets the overspeed bit in the BTR for any scaled frequency above 2000 (120,000Hz).

lowest measurable

frequency

press (F9)  Toggle to select 1 Hz (full frequency range, 1 Hz to 100kHz) or 1/sample time  this field = Bandwidth Limit in BTW configuration block

press (F9)  Toggle to select time only or time/counts (time only means when the

end sample on

minimum sampling time has elapsed and at least one count has been received)

 this field = Terminate Enable in BTW configuration block

counts to end

sampling

enter the number of counts (032,767) to end sampling on

select the precision of the frequency (1Hz or 0.1Hz) returned in the BTR

frequency resolution

(if you have scaling programmed for frequency, the resolution will be in whole

numbers of tenths of scaled frequency units)

frequency scalers (multiply/divide)

enter a multiplier and divisor separated by a (/) to have the module report frequency in units meaningful to your application

(the multiplier must be ≤ the divisor)

RANGE: 1255 DEFAULT: 1/1 (no scaling)

For example, if one count represents 7 gallons, you could scale frequency to

all

gallons per minute by entering scalers of 7/60.

Scaling affects only the frequency and acceleration value that the module returns in the BTR. All programming in the BTW - e.g. highest allowed frequency, output ON and OFF values still in Hz.

Mode abbreviations: Totalizer = T

Nonresettable T

otalizer = NRT Highresolution Frequency = HR Direction Sensor = DS

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17716.5.99 - December 1995

Using I/O Configuration SoftwareE–4

enter a multiplier and divisor here, separated by a (/) to have the module report total counts in units meaningful to your application

(the multiplier must be ≤ the divisor)

scalers for total

(multiply/divide)

RANGE: 032,767 DEFAULT: 1/1 (no scaling)

For example, if 15 counts represent 2 gallons, you could scale counts to gallons by

entering scalers of 2/15.

Scaling affects only the total counts value that the module returns in the BTR. All programming in the BTW - e.g. rollover value, output ON and OFF values is still in Hz .

enter a count value that the totalizer will reset or rollover to 0 at (when the unscaled

rollover value

count reaches that value, the module sets the overflow status bit in the BTR and starts counting again from 0) RANGE: 0-9,999,999 DEFAULT (if you enter 0): 10,000,000

tied to outputs

reset total see if the Total Reset (BTW word 1, bits 0030) is ON (this field is display only). reset overflow see if the Overflow Reset (BTW word 1, bits 0407) is ON (this field is display only).

see the output(s) that are currently tied to this input channel (this field is display only  to tie outputs to a different input channel, use the Output Setup screen.

see the current settings in the BTW data file (you must make any changes to this

start prover

field through a running program on the PLC processor, or by directly setting bits in the BTW; you can not edit these fields with the I/O Configuration software)

prover type, uni

or bidirectional

Mode abbreviations: Totalizer = T

Nonresettable T

press (F9)  Toggle to select the type of prover you are using in your application 0 = unidirectional 1 = bidirectional.

otalizer = NRT Highresolution Frequency = HR Direction Sensor = DS

In mode(s)Current programming You

all

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17716.5.99 - December 1995

Choose one:

a b c

Ladder Editor

Main Menu

General Utility

I/O Ovrview

Edit

Ladder Editor

Main Menu

Cursor to BT instruction

Edit

F10

I/O Edit

Counter Setup

or Monitor

or BT Data

Output Setup

Using I/O Configuration Software E–5

Output Setup Screen

1771–CFM Series A Output Setup Rack–Group–Module: 0–0–0

output current tied to forced or number status channel triggered by ON when >= OFF when >=

0 off 0 rate/frequency 1,000 25,000

1 off 2 total 1,000 3,500,000

2 on 0 rate/frequency 1,000 12,000

3 off 0 acceleration 100 0

Enter numeric trigger value, or press F9 to change direction trigger. > Rem RUN mod 1 of 1 Addr#42:CFM4B Change I/O Channel Monitor BT Data Default Accept Mode Ovrview Setup Tables Config F1 F2 F3 F5 F6 F8 F10

Output Setup

This field Is used to

output number

current status

tied to channel

forced or triggered by

display the output numbers (03) display each output's current status (ON or OFF)  these values reflect the data received the last time a BTR

was

completed (

select

the input channels

ber select what channel characteristic the output is triggered ON or OFF by (the default is disabled) 

press (F9)  Toggle to select one of these characteristics: Disabled: always forces the output to an OFF state.

If you select Disabled, you cannot tie the output to a channel, and you cannot enter ON/OFF values.

Rate/Frequency: specify ON and OFF values in Hz, not in scaled frequency units.

% of Full Scale: specify ON and OFF values as percentages of the channel's highest allowable frequency from the Channel Setup screen.

NRT, HR

Acceleration: channel's alarm must be nonzero. Specify ON and OFF values of -32,768 to 32,767 Hz/s, representing a change per second in unscaled frequency.

Total: Specify ON and OFF values in unscaled counts from 0 to 9,999,999. If the channel has a nonzero rollover value programmed, the ON and OFF values must be less than the rollover.

, NR

Direction: For ON and OFF values, press (F9)  Toggle to select stop, CW (clockwise), or CCW (counterclockwise).

ON when >= OFF when >=

Enter a value between 0 and 9,999,999.

The output state transitions from an OFF state to an ON state when the monitored value exceeds the ON count. The output state transitions from an ON state to an OFF state when the monitored value exceeds OFF.

Press (F4)  Output Setup for other configuration choices or (F10) - Accept to accept your edits. We suggest that you complete your edits on all screens before accepting the edits.

the PLC processor must be in Run mode if you want to receive current data from the CFM module

(03)

that the output channel is tied to (default is None)  Press (F9) - T

oggle to select num

Overflow: If you specify this mode, you must tie the output to a channel, and that channel's mode must be totalizer or nonresettable totalizer. You cannot enter ON and OFF values. The output will be ON when the overflow bit is set in the BTR, and OFF when the overflow bit is clear.

Forced On: If you specify this mode, you cannot tie the output to a channel or enter ON and OFF values.

Prover running: You cannot enter ON and OFF values. The output will be ON during a prover run and OFF at

, NR

other times.

all

Prover range: For ON and OFF values, press (F9)  Toggle to select from these prover values

prover not selected in fwd (forward) leg prover selected but not running fwd leg done in rev (reverse) leg done

If the channel's prover type of the Channel Setup screen is unidirectional, fwd leg done" and in rev leg" are not valid settings for ON and OFF values.

) 

Publication

17716.5.99 - December 1995

Using I/O Configuration SoftwareE–6

Monitor Screen

a b

Ladder Editor

Main Menu

Cursor to BT instruction

Data Monitor

I/O Monitor

Output Setup

Choose one:

I/O Module

System Overview

Monitor

Edit

Output Setup

Counter Setup

or Output Setup

or BT Data

Monitor

Use the monitor screen to check and verify the configuration data.

The values on this screen reflect the data received the last time a BTR was completed. The processor must be in Run mode if you want to receive current data from the module.

1771–CFM Series A Monitor Rack–Group–Module: 0–0–0

ch –––––– frequency ––––––– total acceleration prover total/ alarms (*) % full scale stored count 0 43.0 .07 ( 23) 0 ––– 1 ––– 2 15,498 12.91 ( 4231) 4,349,126 0 0 ––– 3 258 12.92 ( 4233) 2,047,108 0 0 OF (*) AC=acceleration SP=overspeed OF=overflow OR=overrange

Press a function key.

Rem RUN mod 1 of 1 Addr#42:CFM4B Change I/O Channel Output BT Data Mode Ovrview Setup Setup Tables F1 F2 F3 F4 F6

This field Displays

ch frequency total

acceleration prover total/

stored count alarms

mode

direction

prover status output number

the input channel (0 to 3).

the frequency in Hz and % full scale

scaled total counts, using scaling from the Channel Setup screen

the acceleration as a change per second in scaled frequency

the stored count or Prover run result

the alarm activated (SP=overspeed, AC=acceleration, OF=overflow, OR=overrange)

input channel's current mode of operation

the direction of rotation CW (clockwise) or CCW (counterclockwise)

prover status

the output channel (0 to 3)

the state of the current output (ON or OFF)  these values reflect the data received the last time a

current status

BTR was completed (the PLC processor must be in Run mode if you want to receive current data from the CFM module)

tied to channel module power-up

BTW error code

which input channel the output is tied to

whether a BTW has successfully occurred since powerup (YES or NO)

an error code is (If an error occurred in the last BTW)  error codes 1 to 60 are word numbers where invalid configuration was programmed in the BTW data file

all

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If you find a problem with our documentation, please complete and return this form.

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Pub.

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Configurable

1771CFM/B 17716.5.99 95512298

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echnical Accuracy

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What information is missing?

Flowmeter Module User Manual

Pub. No. Pub. Date Part No.

November 1995

Describe Problem(s):

text illustrationT

procedure/step

example

explanation

illustration

guideline

other

definition

feature

Internal Use Only

info in manual

(accessibility)

info not in manual

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What is unclear?

Sequence

What is not in the right order?

Other

Comments

Use back for more comments.

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Name

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Return to: Marketing Communications, AllenBradley Co., 1 AllenBradley Drive, Mayfield Hts., OH 4412461

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Phone:

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Index

Symbols

**Empty**, -1

Numbers

1771QRC module, C-1

abbreviations, P-2

acceleration, 1-8

applications

features, 1-8 modes of operation, 1-5, 4-11 prover, 1-6 typical, 1-3

block transfer

BTR, 1-2 BTW, 1-2

block transfer programming, 3-1

PLC2 family processor, 3-2 PLC3 family processor, 3-3 PLC5 family processor, 3-4 PLC5/250 processor, 3-5

BTR, 1-2

diagnostics, 6-2 structure, 5-1 word assignments, 5-1, 5-2 word descriptions, 5-3, 5-4, 5-5

BTW, 1-2

configuration block, 4-2 word descriptions, 4-3, 4-4, 4-5,

4-6, 4-7

CFM module

as replacement for QRC module, C-1

additional features, C-10 block transfer instructions, C-8 BTR word assignments, C-9 input channel jumpers, C-4 installing, C-5 LED indicators, C-10 new wiring connections, C-6 operation jumper, C-3, D-3

power requirements, C-1

as replacement for QRD module, D-1

additional feature, D-11 block transfer instructions, D-8 BTR word assignments, D-9 input channel jumpers, D-4 installing, D-5 LED indicators, D-11 new wiring connections, D-6, D-7

power requirements, D-2 BTW configuration block, 4-2 configure, 4-16 configuring with I/O Configuration

software, E-1 dc to dc converters, circuit diagram, B-4 discrete outputs, circuit diagram, B-4 European Union Directive, 2-2 flowmeter input

circuit diagram, B-1

signal characteristics, B-2 frequency accuracy, A-1 gate input, 1-6

circuit diagram, B-3 how it works, 1-2 input capabilities, 1-4, 1-5, 1-6 input channel jumpers, 2-4, 2-5 install, 2-7 keying the I/O chassis, 2-6 LED indicators, 6-1 location in I/O chassis, 2-6 modes of operation, 1-5, 4-8, 4-14 module operation jumper, 2-3 new/updated information, P-2 output capabilities, 1-7 power requirements, 2-3 power supply jumper, 2-3 read data from, 5-6 schematics, B-1 setting bits in the BTW configuration

block, 4-16 specifications, A-2 troubleshoot, 6-1 typical applications, 1-3 use of data table, 2-6 using, 1-1 using I/O Configuration software, 4-16 wiring arm connections, 2-8

shield termination, 2-82-9

wiring examples, 2-9

communication, block transfers, 3-1

I–2

Index

dc to dc converters, circuit diagram, B-4

Direction Sensor mode, 1-5, 1-7, 4-14

frequency sampling, 4-14, 4-15

EMC Directive. See European Union

Directive

European Union Directive, CFM module

compliance, 2-2

F0F3. See flowmeter input

flowmeter input, 1-4

circuit diagram, B-1 operation jumper, 2-4, 2-5 signal characteristics, B-2 wiring examples, 2-9

G0G3. See gate input

gate input, 1-4, 1-6

circuit diagram, B-3 operation jumper, 2-4, 2-5 prover value, 1-6 store value, 1-6 wiring examples, 2-9

getting started, P-4

mechanical switch, 2-4 modes of operation, 1-5, 4-8, 4-14 proximity probes, 1-2, 1-4, 2-9 TTL, 1-2, 1-4, 2-9

installation, CFM module, 2-7

jumpers

external power supply, 2-3 input channel, 2-4, 2-5 module operation, 2-3

keying bands, location, 2-6

ladder logic, edit, 3-1

LED indicators, 6-1

CFM (QRC) module, C-10 CFM (QRD) module, D-11

Low Voltage Directive. See European Union

Directive

magnetic pickup, 1-2, 1-4, 2-9

mechanical switch, 2-4

modes of operation, 1-5, 4-8

module location, 2-6

Highresolution Frequency mode, 1-5,

1-7

Highresolution Frequency mode, 4-11

frequency sampling, 4-11, 4-12

bandwidth limit, 4-13 sampling termination, 4-13

I/O chassis

keying bands, 2-6 location of CFM module, 2-6

I/O Configuration software, E-1

I/O configuration software, E-1

input

magnetic pickup, 1-2, 1-4, 2-9

Nonresettable Totalizer mode, 1-4, 1-5,

1-6, 1-7, 4-8

output, circuit, B-4

outputs

assigning, 1-7 circuit diagram, B-4

overflow, 1-8

overrange, 1-8

overspeed, 1-8

Index

I–3

PLC2 family processor, block transfer

programming, 3-2

PLC3 family processor, block transfer

programming, 3-3

PLC5 family processor, block transfer

programming, 3-4

PLC5/250 processor, block transfer

programming, 3-5

power, requirements, 2-3

power requirements, 2-3

programming, PLC-3 example, C-8, D-8

Programming example, PLC-3, C-8,

D-8

prover, 1-6

bidirectional, 1-6 gate input wiring, 2-10 range of operation, 4-7 unidirectional, 1-6

proximity probes, 1-2, 1-4, 2-9

specifications, CFM module, A-2

frequency accuracy, A-1

store count, 1-6

gate input wiring, 2-10

Totalizer and Nonresettable Totalizer modes

counting, 4-8 frequency sampling, 4-9 storing count values, 4-10

Totalizer mode, 1-4, 1-5, 1-6, 1-7,

4-8

troubleshooting, 6-1

TTL, 1-2, 1-4, 2-9

warnings, guarding against ESD, 2-1

wiring arm connections

CFM (QRC) module, C-6 CFM (QRD) module, D-6, D-7 CFM module, 2-8, 2-9

shielded cable, 2-82-9

Worldwide representation.

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

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PN 95512298

, Inc. Printed in USA

•

Rockwell Automation 1771-CFM, D17716.5.99 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Important User Information

Table of Contents

What's In This Manual

New/Updated Information

Abbreviations

Related Documentation

Related Products

Get Started

What This Chapter Contains

How You Use the CFM Module

What's Next

What the CFM Module Does

Typical Applications

Input Capabilities

Output Capabilities

What's Next

What This Chapter Contains

Understand Compliance to European Union Directive

Calculate Power Requirements

Set the Configuration Jumpers

Determine CFM Module Placement

Key the Backplane Connector

Install the CFM Module

Make Connections to the Field Wiring Arm

What This Chapter Contains

Enter Block Transfer Instructions

What's Next

What This Chapter Contains

Select the Mode(s) of Operation

Configure the Module

What's Next

What This Chapter Contains

What's Next

Status Indicators

Diagnostics

What's Next

What This Appendix Contains

Frequency Accuracy

General Specifications

What This Appendix Contains

Input Circuits

Output Circuits

What This Appendix Contains

What the CFM Module Does

Check Power Requirements

Remove Your QRC Module

Set the Configuration Jumpers

Install the CFM Module

Make Connections to the New Wiring Arm

Resume Normal Operation

What This Appendix Contains

What the CFM Module Does

Check Power Requirements

Remove Your QRD Module

Set the Configuration Jumpers

Install the CFM Module

Make Connections to the New Wiring Arm

Resume Normal Operation

What This Appendix Contains

Configure the CFM Module

Index