Mitsubishi Electric MELSEC-A Bedienungsanleitung

PROGRAMMABLE CONTROLLER

hmlwc-A

User's

Manual

Computer link/multidrop link module

type

AJ71

UC24

(Supplement)

CATALOG

#JUM-454

$15.00

MlTSUBlSHl

ELECTRIC

REVISIONS

'The manual number is aiven onthe bottom left of the back cover.

Date

*Manual Number Revision

(NA) 66454-A

First edition

INTRODUCTION

Thank you for choosing the Mitsubishi MELSEC-A Series of General Purpose Programmable Control-

lers. Please read this manual carefully so that the equipment is used to its optimum. A copy of this

manual should beforwarded to the end User.

CONTENTS

COMMON INFORMATION

GENERAL DESCRIPTION

.............................................

1 1

Contents of This Manual

.................................................

1.2

Features

...............................................................

1-3

1.2.1

Control operations usingthe multidrop link function

....................

SYSTEM CONFIGURATIONS

..........................................

2.1

Overall Configuration

....................................................

2.2

Applicable Systems

......................................................

2.3

System Configurations and Available Functions (When Usingthe Computer Link

Function)

...............................................................

2-3

2.3.1 1

ratio of an external device (computer. etc.) to a PC CPU

...........

2.3.2 1

n ratio of an external device (computer. etc.) to PC CPUs

............

2.3.3 2

ratio of external devices (computer. etc.) to a PC CPU

.............

2.3.4 2

n ratio of external devices (computer, etc.) to PC CPUs

..............

2.3.5

n ratio of external devices (computer. etc.) to PC CPUs

.............

2.4

When Selecting a Multidrop Link Function

..................................

2.4.1

When using an

AJ71

UC24

as a master station

.........................

2.4.2

When using an

AJ71UC24

as a local station

...........................

2.5

When Using a Multidrop Link Function and a Computer Link Function

Simultaneously

..........................................................

(

2.6

Precautions Regarding System Configurations

..............................

COMPUTER LINK FUNCTION

SPECIFICATIONS

...................................................

3.1

General Specifications

...................................................

3.2

Performance Specifications

...............................................

3.2.1

Transmission specifications

.........................................

3.2.2

RS-232C

connector specifications

...................................

3.2.3 RS-4221485

interface specifications

..................................

3.2.4 RS-422

cable specifications

.........................................

3.3

Data Communications Functions

..........................................

...........

3.3.1

Functions available using dedicated protocols and commands

3.3.2

Functions available inthe no-protocol mode

..........................

3.3.3

Functions available inthe bidirectional mode

.........................

3.3.4

Transmission error data read function

...............................

3.4

Mode Switching Function During ComputerLink Operations

..................

3.4.1

Precautions when mode switching

..................................

3.4.2

Procedure for switching the mode from an external device

.............

3.4.3

Procedure for switching the mode from a PC CPU

.....................

3.5

Data Communications Transmission Control Function

.......................

(

3.6

110 Signals List for CPU

.................................................

.................................

3.7 Buffer Memory Applications and Allocation 3

...................

SETTINGS AND PROCEDURES BEFORE OPERATION

..................................

4.1 Settings and Procedures before Operation 4

...............................

4.2 Nomenclature and LED Signals and Dispalys 4

.....................................................

4.2.1 Nomenclature 4

4.2.2 LED signals and displays

...........................................

................................................................

4.3 Settings 4-5

4.3.1 Setting the dedicated protocol, no-protocol mode. or bidirectional mode

...

4.3.2 Setting of transmission specifications. main channels and terminal

resistance

........................................................

4-5

.............................................

4.3.3 Station number setting 4

.....................................

4.3.4 Terminal resistance connections 4

..................................................

4.4 Loading and Installation 4

...............................................

4.4.1 Handling instructions 4

............................................

4.4.2 Installation environment 4

.........................................................

4.5 External Wmng 4

...........................................

4.5.1 Precautions during wiring 4

.................................

4.5.2 Connecting the RS-232C connectors 4

...............................

4.5.3 Connecting the RS-4221485connectors 4

4.5.4 Connecting a multidrop link and setting modes and terminal resistance

...

4.6 Self-IoopbackTest

.......................................................

4-9

4.7 LoopbackTest

..........................................................

4- 9

..............................................

4.8 Maintenance and Inspection 4

HALF-DUPLEX COMMUNICATIONS USING THE RS-232C INTERFACE

...........

DATA COMMUNICATIONS USING AN M:N MULTIDROP LINK

...................

INITIALSETTING OF TRANSMISSION CONTROL DATA TO BUFFER

MEMORY

...........................................................

7-1 -7-8

Setting RS-232C CD Terminal Check EnableIDisable

........................

Setting the Transmission Method for RS-232C

..............................

..........................................

Reading Transmission Error Data 7

Settings in the No-Protocol Mode

..........................................

Settings in the Bidirectional Mode

.........................................

..................................................

Mode Switching Setting 7

7.6.1 Reading inthe mode setting state

....................................

.........................................

7.6.2 Mode switching designation 7

Transmission Control Setting

.............................................

Reading RS-232C Signal Data

...................

;

........................

Reading the Mode Setting Switch/Station Number Setting Switch Status

........

7.10 Reading the Transmission Specification Setting Switch Statuses

...............

COMMUNICATIONS USING DEDICATED PROTOCOLS

..................

......................

8.1 Data Flow in Communications with Dedicated Protocols 8

......................................................

8.2 Programming Hints 8-1

8.2.1 To write data to the special applications area inbuffer memory ..........8

8.2.2 PC CPU operation during data communications ........................8-1

8.2.3 Precautions during data communications

..............................

8-1

8.3 Basics of Dedicated Protocol Control Procedures

............................

8-1

8.4 Basic Formats of Dedicated Protocol

.......................................

8-1

8.4.1 Control format 1

...................................................

8-1

8.4.2 Control format 2

...................................................

8-1

8.4.3 Control format 3

...................................................

8-1

8.4.4 Control format

...................................................

8-1

8.4.5 Setting protocol data ...............................................8-2

8.5 Transmission Sequence Timing Charts and CommunicationsTime .............8-3

8.6 Character Area DataTransmission

........................................

8-4

8.7 Device Memory ReadIWrite

...............................................

8-5

8.7.1 Commands and device ranges .......................................8-5

8.7.2 Batch read in units of bits

...........................................

8-8

8.7.3 Batch read inunits of words

.........................................

8-8

8.7.4 Batchwrite in units of bits

..........................................

8-8

8.7.5 Batchwrite in units of words

........................................

8-8

8.7.6 Testing device memory inunits of bits (random write) .............

8.7.7 Testing device memory inunits of words (randomwrite)

..........

8.7.8 Monitoring device memory ....................................

8.8 Extension File Register Read and Write

..............................

8.8.1 ACPU common commands and addresses

......................

8.8.2 AnA dedicated commandsand device numbers

..................

8.8.3 Precautions during extension file register read/write

.............

8.8.4 Batch read of the extension file register (ACPU commoncommand) ......

8.8.5 Batchwrite of the extension file register (ACPU commoncommand) 8-9

8.8.6 Direct readof the extension file register (AnACPU dedicated command) ..8

8.8.7 Direct write of the extension file register (AnACPU dedicated command) ..8

8.8.8 Testing (random write) the extension file register (ACPU common

command) ........................................................8-9

8.8.9 Monitoringthe extension file register

.................................

8-9

8.9 Buffer Memory Readand Write ............................................8-9

8.10 Special Function Module Buffer Memory Read and Write

.....................

8-9

8.11 Remote RunIStop of PC CPU and Reading PC CPU Model Name

..............

8-9

8.11.1 Commands .......................................................8-9

8.11.2 Remote RUNISTOP

...............................................

8 -10

8.11.3 Reading PC CPU model name

......................................

8 -10

8.11.4 Reading PC CPU model name and itscode

..........................

8 -10

8.12 Program ReadlWrite

....................................................

8 -11

8.12.1 Precautions during program readlwrite

...............................

8 -11

8.12.2 Program readlwrite control procedures ..............................8 -12

8.12.3 Parameter memory readlwrite

......................................

8 -12

8.12.4 Sequence program readlwrite

......................................

8 -12

8.12.5 Microcomputer program readlwrite

..................................

8 -13

8.12.6 Comment memory readlwrite 8 -13

.......................................

..............................

8.12.7 Extension comment memory readlwrite 8

........................................................

8.13 Global Function 8-13

....................................................

8.14 On-demand Function 8

.........................................................

8.15 LoopbackTest 8-13

. COMMUNICATIONSWITH A COMPUTER INTHE NO-PROTOCOL MODE

.........

9.1 Basics of the No-ProtocolMode

.....................................

9.2 Handshake IlOSignals

.............................................

9.3 Programming Hints ................................................

9.3.1 To write data to the special applications area in buffer memory

....

9.3.2 Precautions during data communications

........................

9.4 Basic Programto ReadIWrite Buffer Memory ..........................

9.5 Receiving Data inthe No-Protocol Mode (External Device

AJ71UC24)

9.6 Sending Data inthe No-ProtocolMode (AJ71UC24

External Device)

...........................

10. COMMUNICATIONS INTHE BIDIRECTIONAL MODE 10

...............................................

10.1 Bidirectional Mode Basics 10

....................................10.2 Handshake Signals and Buffer Memory 10

.....................................................

10.3 Programming Hints 10

10.3.1 System configuration and communications mode for bidirectional mode

commun~cat~ons..................................................10-1

10.3.2 To write data to the special applications area in buffer memory

.........

10.3.3 Precautions during data communications

.............................

....................................

10.4 Bidirectional Control Procedure Basics 10

.....................................

10.5 Bidirectional Communications Basics 10

10.6 Processing an AJ71UC24 for Simultaneous Send in Full-Duplex Mode .........10

10.7 Basic Programto ReadIWrite Buffer Memory

...............................

10.8 Receiving Data inthe Bidirectional Mode (Computer

AJ71UC24)

..........

10.9 Transmitting Data inthe Bidirectional Mode (AJ71UC24

Computer)

.........

..............................................

. TROUBLESHOOTING

1 NAK Error Codes with Dedicated Protocols ................................11

....

...,

11.2 Bidirectional Mode Error Codes

....................

11.3 Troubleshooting

..................................

MULTIDROP LlNK FUNCTION

. SPECIFICATIONSFOR MULTIDROP LINK FUNCTION ...

12.1 Transmission Specifications

.......................

12.2 RS-4221485Interface Specifications

................

12.3 RS-422 Cable Specifications

.......................

13. SETTINGS AND PROCEDURES BEFORE OPERATION

...

13.1 Settings and Procedures before Operation

...........

........

13.2 Nomenclature and LED Signals and Displays

13.2.1 Nomenclature ..............................

13.2.2 LED signals and displays

..............................

...........

13-3

13.3 Settings

...............................................................

13-4

13.3.1 Setting masterllocal station

........................................

13.3.2 Settings of transmission specifications

...............................

13.3.3 Station number setting

............................................

13.3.4 Connectionof terminal resistance

...................................

13.4 External Wiring

........................................................

13.4.1 Multidrop link connection

..........................................

13.5 Self-loopback Test

......................................................

13.5.1 Procedureto carry out self-loopbacktest

............................

13.5.2 Self-loopbacktest operations

.......................................

AJ71UC24 MASTER STATION

......................................

14 37

14.1 Functions

.............................................................

14.2 110 Signals List for PC CPU

..............................................

14.3 Buffer Memory

.........................................................

14.3.1 Accessed slave station/transmissionpriority

..........................

14.3.2 Number of communication data bits

.................................

14.3.3 Maximum number of transmissionpoints setting area

..................

14.3.4 Off-communicationstation setting area

..............................

14.3.5 Communicationdata area

..........................................

14.3.6 Faulty slave station indication

.....................................

14.3.7 Communicationtime

............................................

14.3.8 Return request

.................................................

14.4 Data CommunicationsMethodswith Slave Stations with the Maximum

CommunicationsPoint Settingof 256 Points

.............................

14.4.1 Communicationwith AOJ2C25

....................................

14.4.2 Communicationwith local station (AJ71UC24)

......................

14.5 Data Communicationwith Slave Stationswhen the Maximum Number of

Transmission PointsisSet at 512

......................................

14.5.1 Communicationwith AOJ2C25

....................................

14.5.2 Communicationwith local station (AJ71UC24)

......................

14.6 AJ71

UC24

Control

....................................................

14.7 Error Control

.........................................................

14.7.1 Pre-transmissionerror processing

................................

14.7.2 Datatransmission error processing

...............................

14.8 Off-communicationControl

............................................

14 26

14.9 Transmission Delay Time

..............................................

14 28

14.10 Transmission Stop DetectionTime

......................................

14 28

14.11 Programming

........................................................

14-29

14.11

1 Notes on programming

..........................................

14.11.2 Initial data write

................................................

14-30

14.11.3 Start-up and error reset

..........................................

14.11.4 Transmissiondata write

.........................................

14.11.5 Receiveddata read

.............................................

(

14.11.6 Off-communicationstation setlcancel program

......................

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