Azbil MF MCF Manual de usuario

MCF

Air Flowmeter

User's Manual

for

Communication Functions

No. CP-SP-1300E

Thank you for purchasing the MCF Air

Flowmeter.

This manual contains information for

ensuring the correct use of the MCF. It

also provides necessary information for

installation, maintenance, and trou-

bleshooting.

This manual should be read by those

who design and maintain equipment

that uses the MCF. Be sure to keep this

manual nearby for handy reference.

The µFTM, Micro Flow and µF sensor are trademarks of Azbil Corporation in

Japan.

If it is necessary to change the parameters of the MCF flowmeter frequently by

communications, write the changes to RAM, not to EEPROM. EEPROM is limited to

10,000 erase/write cycles.

Note that data in RAM is cleared and replaced with data from EEPROM if the power

supply to the MCF is interrupted.

IMPORTANT

Be sure that the user receives this manual before the product is used.

Copying or duplicating this user’s manual in part or in whole is forbid-

den. The information and specifications in this manual are subject to

change without notice.

Considerable effort has been made to ensure that this manual is free

from inaccuracies and omissions. If you should find an error or omis-

sion, please contact the azbil Group.

In no event is Azbil Corporation liable to anyone for any indirect, special

or consequential damages as a result of using this product.

NOTICE

Conventions Used in This Manual

■To prevent injury to the operator and others, and to prevent property damage, the following types of safety

precautions are indicated:

■In describing the product, this manual uses the icons and conventions listed below.

Use caution when handling the product.

The indicated action is prohibited.

Be sure to follow the indicated instructions.

Handling Precautions:

Handling Precautions indicate items that the user should pay attention to when

handling the MCF.

Note:Notes indicate information that might benefit the user.

:This indicates the item or page that the user is requested to refer to.

(1), (2), (3): Numbers within parentheses indicate steps in a sequence or parts of an

explanation.

>>: Indicates the result of an operation, details displayed on the personal computer or

other devices, or the state of the device after operation.

03、P-07 This indicates 7-segment indication on the setup display.

[MODE] key:This indicates a key on the setup display.

WARNING Warnings are indicated when mishandling this product might result in

death or serious injury.

CAUTION Cautions are indicated when mishandling this product might result in

minor injury to the user, or only physical damage to the product.

Safety Precautions

CAUTION

Before removing, mounting, or wiring the MCF, be sure to turn off the MCF and all con-

nected devices. Failure to do so might cause electric shock.

Do not disassemble the MCF.

Doing so might cause malfunction.

Wire this device properly, according to the standards given in this document, using the

specified types of wire and connection procedures. Failure to do so could result in mal-

function.

Use this device within the operating ranges given in the specifications for temperature,

humidity, voltage, vibration, shock, mounting direction, atmosphere, etc. Failure to do

so might cause malfunction.

Do not allow wire clippings, metal shavings, water, etc. to enter the device’s case. If

they do, they could cause faulty operation or device failure.

The Role of This Manual

iii

MCF Air Flowmeter User's Manual for Communication Functions

Manual No. CP-SP-1300E

This manual.

Those using the "communication functions" of the MCF series should read

this manual.

This manual describes an outline of communications, wiring, communication

procedures, a list of MCF series communication data, how to remedy

trouble, and communication specifications.

ser'sM

anual

P-UM-0

WARNING

AUTI

WARNING

AUTI

MCF Air Flowmeter User's Manual for Installation

Manual No. CP-UM-5498JE

This manual is supplied with the device. Personnel in charge of design and/or

manufacture of a system using this device must thoroughly read this manual.

This manual describes the safety precautions, installation, wiring, list of

parameters, and primary specifications.

MCF Air Flowmeter User's Manual for Installation and Configuration

Manual No. CP-SP-1276E

The manual describes the hardware and all functions of this device.

Personnel in charge of design, manufacture, operation, and/or maintenance

of a system using this device must thoroughly read this manual. It describes

installation, wiring, functions and settings, operating procedures, trou-

bleshooting, and specifications.

A total of three different manuals are available for the MCF. Read them as necessary for your specific requirements.

If a manual you require is not available, contact the azbil Group or its dealer.

Organization of This User's Manual

This manual is organized as follows:

Chapter 1. OVERVIEW

This chapter describes communication outline of the MCF series.

Chapter 2. WIRING

This chapter describes RS-485 wiring methods to make a communication

link between the MCF series and other instruments.

Chapter 3. SETTING

This chapter describes MCF series communication settings.

Chapter 4. COMMUNICATION PROCEDURE

This chapter describes communication procedures, message configuration,

data read/write and signal timing operations.

Chapter 5. COMMUNICATION DATA TABLE

This chapter provides various data address tables for communications on

the MCF series.

Chapter 6. TROUBLESHOOTING

This chapter describes checkpoints to diagnose failures in MCF series com-

munications.

Chapter 7. SPECIFICATIONS

This chapter lists communication specifications for the MCF series.

Appendix

The appendix provides code table.

Contents

Conventions Used in This Manual

Safety Precautions

The Role of This Manual

Organization of This User's Manual

Chapter 1. OVERVIEW

■Features •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••1-1

■Hardware configuration 1 ••••••••••••••••••••••••••••••••••••••••••••••1-1

■Hardware configuration 2 ••••••••••••••••••••••••••••••••••••••••••••••1-2

Chapter 2. WIRING

■Connection with 3-wire system ••••••••••••••••••••••••••••••••••••••••2-2

■Connection with 5-wire system ••••••••••••••••••••••••••••••••••••••••2-3

Chapter 3. SETTING

■Setting method•••••••••••••••••••••••••••••••••••••••••••••••••••••••••3-1

■Function settings ••••••••••••••••••••••••••••••••••••••••••••••••••••••3-2

Chapter 4. COMMUNICATION PROCEDURE

4-1 Outline of Communication Procedure and Messages••••••••••••••••••••••4-1

■Communication procedure•••••••••••••••••••••••••••••••••••••••••••••4-1

4-2 Command••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••4-8

■Function 0x03 (Read multiple words command) •••••••••••••••••••••••4-8

■Function 0x06, Write single register (write 1 word command) ••••••••4-10

■

Function 0x10, Write multiple registers (Write multiple words command)

4-11

4-3 Timing Specifications ••••••••••••••••••••••••••••••••••••••••••••••••••••4-14

■Timing specifications for instruction and response messages •••••••4-14

■RS-485 driver control timing specifications•••••••••••••••••••••••••••4-14

Chapter 5. COMMUNICATION DATA TABLE

5-1 Basic Communication Data Processing •••••••••••••••••••••••••••••••••••5-1

■Communication data types and formats •••••••••••••••••••••••••••••••5-1

■Communication data storage memory •••••••••••••••••••••••••••••••••5-1

■Data address •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••5-2

■Number of data read / write ••••••••••••••••••••••••••••••••••••••••••••5-2

■Data unit and decimal point position•••••••••••••••••••••••••••••••••••5-2

5-2 Communication Data Table ••••••••••••••••••••••••••••••••••••••••••••••••5-3

■Device related data•••••••••••••••••••••••••••••••••••••••••••••••••••••5-3

■Operating status related data ••••••••••••••••••••••••••••••••••••••••••5-5

■Instantaneous flow rate related data •••••••••••••••••••••••••••••••••••5-6

■Integrated flow rate related data •••••••••••••••••••••••••••••••••••••••5-7

■Function setup related data ••••••••••••••••••••••••••••••••••••••••••••5-8

■Parameter setup related data •••••••••••••••••••••••••••••••••••••••••5-10

■Maintenance mode••••••••••••••••••••••••••••••••••••••••••••••••••••5-11

Chapter 6. TROUBLESHOOTING

Chapter 7. SPECIFICATIONS

■RS-485 specifications ••••••••••••••••••••••••••••••••••••••••••••••••••7-1

Appendix

■Code table ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••App-1

Chapter 1. OVERVIEW

The MCF series flowmeter (hereafter referred to as the MCF or the slave station) can communicate settings and

data with a host device, such as a PC or PLC (also called the master station). Users write a customized

communication program for this purpose.

■Features

The MCF has the following communications features.

•Remote data collection and parameter setting by RS-485 communications.

•Support for Modbus communications protocol (ASCII/RTU mode).

•With RS-485 communications, up to 31 slave stations can be connected to the

master station, which can read instantaneous flow rate and total flow values and

various settings from slave stations, and can also write settings to slave stations

using the user's own communications program.

•Uses “station addresses” for RS-485 communications to identify connected

•When the following procedure is completed during communication, various

data for the controller can be read or written:

(1) The master station transmits a request message to the slave station.

(2) The master station receives a response message from the slave station.

•The commands from master station to slave station are classified into two

types: read and write.

•The type of read/write data can be selected by data address.

■Hardware configuration 1

Master station

Slave station

(MCF)

Max. 31units

RS-232C / RS-485 converter

(CMC10L)

RS-485 (3-wire system)

1-1

1-2

■Hardware configuration 2

LAN (Ethernet)

Master station

Slave station

(MCF)

Max. 31units

MODBUS converter (gateway)

RS-485 (3-wire system)

Chapter 1. OVERVIEW

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