Rockwell Automation 1771-CFM, D17716.5.99 User Manual

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

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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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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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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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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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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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+ 69 hidden pages

Rockwell Automation 1771-CFM, D17716.5.99 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