Mitsubishi Electric MELSEC FX, RS-232C, RS-422, RS-485 User Manual

Download

MELSEC FX Series

Programmable Logic Controllers

User's Manual

Communications Modules

RS-232C, RS-485, RS-422

INDUSTRIAL AUTOMATION

MITSUBISHI ELECTRI

MIT

SUBIS

HI ELECTRI

Art. no.: 070143 15 04 2003 JY992D69901 Version E

Foreword

• This manual contains text, diagrams and explanations which will guide the reader in the correct installation and o peration of the communication facilities of FX seri es. It should be read and understood before attempting to install or use the unit.

• Further information can be found in the re specti ve manual of each programmab l e control ler.

• If in doubt at any stage of the installation of the communication faciliti es of FX series always consult a professional electrical engineer wh o is qualified and trained to the local and national standards that applies to the installation site.

• If in doubt about the operation or use of the communication facilities of FX series please consult the nearest Mitsubishi Elec tric dis tributor.

• This manual is subject to change without notice.

FX communication

FX COMMUNICATION (RS-232C, RS-485, RS-422)

USER’S MANUAL

Brand and product names described by/in this manual are trademarks or registered trademarks of the irrespective owners.

Manual number : JY992D69901 Manual revision : E

Date : April 2003

FX communication

FAX BACK

Mitsubishi has a world wide reputation f or its eff orts in continually de veloping and pushing back the frontiers of industrial automation. What is sometimes overlooked by the user is the care and attention to detail that is taken with the documentation. However, to continue this process of improvement, the comments of th e Mitsubish i users ar e always welcomed. This pag e has been designed for you, the reader, to fill in your comments and fax them back to us. We look forward to hearing from you.

Fax numbers: Your name:...................................................

Mitsubishi Electric.... .....................................................................

America (01) 847-478-2253 Your company:.............................................

Australia (02) 638-7072 .....................................................................

Germany (0 21 02) 4 86-1 12 Your location:................................................

Spain (34) 93-589-1579 .....................................................................

United Kingdom (01707) 278-695

Please tick the box of your choice

What condition did the manual arrive in?

Good

Minor damage

Unusable

Will you be using a f older to store the manual?

Yes

What do you think to the manual presentation?

Tidy

Unfriendly

Are the explanations understandable?

Yes

Not too bad

Unusable

Which explanation was most difficult to understand:..................................................................

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

Are there any diagrams which are not clear?

Yes

If so,which:..................................................................................................................................

What do you think to the manual layout?

Good

Not too bad

Unhelpful

If there one thing you would li ke to see improved, what is it?.................... .. ............................ ...

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

Could you find the information you required easily using the index and/or the conten ts, if

possible please identify your experience: ...................................................................................

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

Do you have any comments in general about the Mitsubishi manuals? ............. ........................

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

Thank you for taking the time to fill out this questionnai re. We hope you found both the product and this manual easy to use.

FX communication

iii

FX communication

Guidelines for the Safety of the User and Protection of the programmable controllers

This manual provides information for the use of the FX series communication unit. The manual has been written to be used by trained and competent personnel. The definition of such a person or persons is as follows;

a) Any engineer who is responsible for the planning, design and construction of automatic

equipment using the product associated w ith this manual should be of a competen t nature, trained and qualified to the loc al and national sta ndards required to fulfill that role. These engineers should be fully aware of all aspects of safety with regards to automated equipment.

b) Any commissioning or service engineer must be of a competent nature, trained and

qualified to the local and national standards require d to fulfill that job. These engineers should also be trained in the use and maintenance of the completed product. This includes being completely f amili ar with all ass ociated doc umentation for the said product. All maintenance should be carried out in accordance with established safety pra ctices.

c) All operators of the completed equipment (see Note) should be trained to use this

product in a safe manner in compliance to established safety practices. The operators should also be familiar with documentation which is associated with the operation of the completed equipment.

Note :

Note: the term ‘completed equipment’ refers to a third party constructed device which contains or uses the product associated with this manual.

Notes on the Symbols Used in this Manual

At various times throughout this manual cer tain symbols will be used t o highlight points of information which are intended to ensure the users personal safety and protect the integrity of equipment. Whenever any of the following symbols are encountered its associated note must be read and understood. Each of the symbols used will no w be listed wi th a brief description of its meaning.

Hardware Warnings

1) Indicates that the identified danger

WILL

cause physical and prop erty damage.

2) Indicates that the identified danger could

POSSIBLY

cause physical and proper ty

damage.

3) Indicates a point of further interest or further explanation.

Software Warnings

4) Indicates special care must be taken when using this element of software.

5) Indicates a special point which the user of the associate software element should be aware of.

6) Indicates a point of interest or further explanation.

FX communication

• Under no circumstances will Mitsubishi Electric be liable responsible for any consequential damage that may arise as a result of the installation or use of this equipment.

• All examples and diagrams shown in this manual are intended only as an aid to understanding the text, not to guarantee operation. Mitsubishi Electric will accept no responsibility for actual use of the product based on these illustrative examples.

• Please contact a Mitsubishi Electric distributor for more information concerning applications in life critical situations or high reliability.

FX communication

vii

Further Information Manual List

Table 1: Further Information Manual List

Manual name Manual No. Description

Hardware Manual JY992D83901

This manual contains written hardware explanation of wiring, installation and specification, etc. regarding the FX

Series programmable controller.

/ FX0N Hardware Manual JY992D47501

This manual contains written hardware explanation of wiring, installation and specification, etc. regarding the FX

and FX0N Series programmable controllers.

FX Hardware Manual JY992D47401

This manual contains written hardware explanation of wiring, installation and specification, etc. regarding the FX Series programmable controller.

Supplementary Manual JY992D50201

This manual contains supplementary data regarding the FX Series programmable controller Hardware Manual

Hardware Manual JY992D88201

This manual contains written hardware explanation of wiring, installation and specification, etc. regarding the FX

Series programmable controller.

Hardware Manual JY992D66301

This manual contains written hardware explanation of wiring, installation and specification, etc. regarding the FX

Series programmable controller.

2NC

Hardware Manual JY992D76401

This manual contains written hardware explanation of wiring, installation and specification, etc. regarding the FX

2NC

Series programmable controller.

FX Programming Manual JY992D48301

This manual contains written instructions regarding the FX

, FX0S, FX0N, FX, FX2C, FX2N and FX

2NC

Series

programmable controllers.

FX Programming Manual

ΙΙΙΙΙΙΙΙ

JY992D88101

This manual contains written instructions regarding the FX

, FX1N, FX2N and FX

2NC

Series

programmable controllers.

FX / FX

-485ADP User’s

Guide

JY992D53201

This manual contains written hardware explanation of installation and specification regarding the FX-485ADP and FX

-485ADP.

2NC

-485ADP Installation

Manual

JY997D01201

This manual contains written hardware explanation of installation and specification regarding the FX

2NC

-485ADP.

FX-232ADP User’s Guide JY992D48801

This manual contains written hardware explanation of installation and specification regarding the FX-232ADP.

-232ADP User’s Guide JY992D51301

This manual contains written hardware explanation of installation and specification regarding the FX

-232ADP.

2NC

-232ADP Installation

Manual

JY997D01101

This manual contains written hardware explanation of installation and specification regarding the FX

2NC

-232ADP.

-232-BD User’s Guide JY992D66001

This manual contains written hardware explanation of installation and specification regarding the FX

-232-BD.

FX communication

viii

FX2N-485-BD Hardware Manual

JY992D73401

This manual contains written hardware explanation of installation and specification regarding the FX

-485-BD.

-422-BD User’s Guide JY992D66101

This manual contains written hardware explanation of installation and specification regarding the FX

-422-BD.

-232-BD Hardware

Manual

JY992D84501

This manual contains written hardware explanation of installation and specification regarding the FX

-232-BD.

-485-BD Hardware

Manual

JY992D84301

This manual contains written hardware explanation of installation and specification regarding the FX

-485-

BD.

-422-BD User’s Guide JY992D84101

This manual contains written hardware explanation of installation and specification regarding the FX

-422-BD.

FX-485-IF Hardware Manual JY992D81801

This manual contains written hardware explanation of installation and specification regarding the FX-485-IF.

Table 1: Further Information Manual List

Manual name Manual No. Description

Table of Contents

Further Informa t ion M a nu a l Li st ...................... ................... .................... ......vii

1. Introduction .............................................................................................1-1

1.1 Abbreviations, Generic Names and Terms Used in This Manual..........................1-1

1.2 Communication Types...........................................................................................1-2

1.3 System Configuration ............................................................................................1-3

1.3.1 N:N Network .................. ....... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... .......................1-3

1.3.2 Parallel Link ....................................... ...... ....... ...... ....... ...... ...... ....... ...... ....... .............................1-3

1.3.3 Computer Link.......... ...... ....... ...... .................................................... ..........................................1-5

1.3.4 No Protocol Communication ............. ...... ....... ...... ....... ...... .......................................................1-6

1.4 Supported Functions and Applicable Versions .....................................................1-6

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

2.1 Communication Specification................................................................................2-1

2.2 Communication Time.............................................................................................2-2

2.2.1 N:N network ............................................................................ ....... ..........................................2-2

2.2.2 Parallel link .............. ...... ....... ...... ....... .......................................................................................2-2

2.2.3 Computer link........................ ...... ....... ...... ....... ...... .................................................... ................2-3

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

3.1 Caution on cable selection................................. .... ..... .......................................... .3-2

3.1.1 FX1N-485-BD, FX2N-485-BD, FX

2NC

-485ADP..........................................................................3-2

3.1.2 FX

-485ADP .......................................................................................................................... 3-2

3.1.3 FX

-40AW.................................................................................................................................3-2

3.2 Using RS-232C Interface.......................................................................................3-3

3.2.1 Using RS Instruction or Computer Link.....................................................................................3-3

3.2.2 Using FX

-232IF.....................................................................................................................3-4

3.3 Using RS-485 Interface.........................................................................................3-6

3.3.1 Wiring Selection.............................................. ...... ....... ...... ...... .................................................3-6

3.3.2 Terminal Resistor........................ ....... ...... .................................................... ...... ....... ................3-6

3.3.3 One-pair Wiring ................................. ...... ....... ...... ....... .............................................................3-7

3.3.4 Two-pair Wiring ................................. ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... . ...............3-8

3.4 Parallel Link...........................................................................................................3-9

3.4.1 FX

2N(1N)

-485-BD and FX0N-485ADP........................................................................................3-9

3.4.2 FX

-485ADP and FX0N-485ADP ..........................................................................................3-10

3.4.3 FX

2N(1N)

-485-BD and FX

2N(1N)

-485-BD .................................................................................3-11

3.4.4 FX

2NC

-485ADP and FX0N-485ADP........................................................................................3-12

3.4.5 FX

2N(1N)

-485-BD and FX

2NC

-485ADP....................................................................................3-13

3.4.6 FX

2NC

-485ADP and FX

2NC

-485ADP......................................................................................3-14

3.4.7 FX

-40AW and FX2-40AW ............................. ............. ............ ............. ............. ............. ........ 3-15

3.4.8 FX

-40AP and FX2-40AP ............................... ................... ................... .................... ..............3-15

4. N:N Network............................................................................................4-1

4.1 Related Flags and Data Registers.........................................................................4-1

4.1.1 Auxiliary Relays .......................................................................................... .............................4-1

4.1.2 Data Registers ..................... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ................4-2

FX communication

4.2 Setting....................................................................................................................4-3

4.2.1 Setting the Station No. (D8176)................................................................................................4-3

4.2.2 Setting the Total Number of Slave Stations (D8177) ...............................................................4-3

4.2.3 Setting the Refresh Range (D8178)..........................................................................................4-4

4.2.4 Setting Retry Count (D8179).....................................................................................................4-5

4.2.5 Setting Comms Time-out (D8180) ............................................................................................4-5

4.2.6 Program Used for Setting ........................................................................................................4-6

4.3 Example Program..................................................................................................4-7

4.3.1 System Configuration .... ....... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... .......................4-7

4.3.2 Operations ............................ ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... .............................4-7

4.3.3 Example of Setting Program.....................................................................................................4-8

4.3.4 Example of Error Program .......................................................................................................4-8

4.3.5 Example of Operation Program ................................................................................................4-9

5. Parallel link..............................................................................................5-1

5.1 Related Flags and Data Registers ........................................................................5-1

5.2 Mode and Link Device...........................................................................................5-2

5.2.1 Normal Mode (Special auxiliary relay M8162: OFF) ................................................................5-2

5.2.2 High Speed Mode (Special auxiliary relay M8162: ON) ...........................................................5-3

5.3 Example Program..................................................................................................5-4

5.3.1 Normal Mode ..................................... ................................................... ....................................5-4

5.3.2 High Speed Mode .....................................................................................................................5-4

6. Communication format (D8120)....................................... .......................6-1

6.1 What Is Communication Format? ..........................................................................6-1

6.2 Related Flags and Data Registers.........................................................................6-1

6.2.1 Special Auxiliary Relays ........................................................................................................... 6-1

6.2.2 Special Data Registers ............................................................................................................6-1

6.3 Communication Format (D8120) ..........................................................................6-2

6.4 Example of setting program...................................................................................6-3

7. Computer Link.........................................................................................7-1

7.1 Data Flow by Link..................................................................................................7-1

7.2 Information Needed Before Programming.............................................................7-3

7.2.1 Programmable Controller Operation.........................................................................................7-3

7.2.2 Computer Notes................................. ................................................... ....................................7-3

7.3 How to Read a Control Protocol Diagram..............................................................7-4

7.4 Basic Formats of Dedicated Protocol ....................................................................7-5

7.4.1 Control Protocol Format 1 ........................................................................................................7-6

7.4.2 Control Protocol Format 4.........................................................................................................7-7

7.4.3 Control Protocol Parts Explained..............................................................................................7-8

7.4.4 Time-out Check Time..............................................................................................................7-11

7.5 Communication Timing Chart..............................................................................7-12

7.5.1 Reading Data from Programmable controller .........................................................................7-12

7.5.2 Writing Data to Programmable Controller............................................................................... 7-12

7.5.3 Communication Time...................................... ................................................... .....................7-13

7.6 Character Area Data Transmission.....................................................................7-14

7.6.1 Bit Device Memory..................................................................................................................7-14

7.6.2 Word Device Memory .............................................................................................................7-15

7.7 Commands and Device Ranges..........................................................................7-16

7.7.1 Commands........ ....... ...... ....... ...... ....... ...... .................................................... ...... .....................7-16

7.7.2 Device specification ranges....................................................................................................7-17

7.8 Example Computer Program for Loopback Test .................................................7-18

FX communication

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

8.1 Batch Read of Bit Device (BR command)..............................................................8-2

8.2 Batch Read of Word Device (WR command)........................................................8-3

8.3 Batch Write of Bit Device (BW command).............................................................8-5

8.4 Batch Write of Word Device (WW command)........................................................8-6

8.5 Test of Bit Device (BT command)..........................................................................8-8

8.6 Test of Word Device (WT command) ....................................................................8-9

8.7 Remote RUN/STOP (RR, RS commands) ..........................................................8-10

8.7.1 Operation of Remote RUN/STOP...........................................................................................8-10

8.7.2 Conditions for Valid Execution of Remote RUN/STOP...........................................................8-10

8.7.3 Control Specification and Examples of Remote RUN/STOP..................................................8-11

8.8 Reading The Programmable Controller Type (PC command).............................8-12

8.8.1 Type Codes .......................... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ..............8-12

8.8.2 Control Specification and Example.........................................................................................8-13

8.9 Global Function (GW command).........................................................................8-14

8.9.1 Control Specification and Example of Global Function...........................................................8-14

8.10 On-demand Function.........................................................................................8-15

8.10.1 Special Devices Used in On-demand Function ....................................................................8-15

8.10.2 On-demand Control Protocol................................................................................................8-16

8.10.3 Specification and Example of On-demand............................................................................ 8-18

8.11 Loopback Test...................................................................................................8-21

9. RS instruction..........................................................................................9-1

9.1 Function and Operation.........................................................................................9-1

9.1.1 Send and Receive Program......................................................................................................9-1

9.1.2 Operation of RS Instruction.......................................................................................................9-3

9.1.3 Related Flags and Data Registers............................................................................................9-4

9.2 Hardware Hand Shake Operation..........................................................................9-6

9.2.1 FX, FX2C, FX

0N,

FX1S, FX1N and FX

(earlier than V 2.00)....................................................9-6

9.2.2 FX

, FX

2NC

(V 2.00 or later) .................................................................................................9-10

9.3 Number of Communication Data.........................................................................9-13

9.3.1 Deal with 16 bits Data............................................................................................................. 9-13

9.3.2 Deal with 8 bits Data............................................................................................................... 9-14

9.4 Example Program................................................................................................9-15

9.4.1 Personal Computer......................................... ...... ....... ...... ...... ....... ........................................9-15

9.4.2 Printer ......................................... ....... ...... ....... ...... ..................................................................9-17

10. FX2N-232IF..........................................................................................10-1

10.1 Introduction........................................................................................................10-1

10.1.1 Outline of Product.................................................................................................................10-1

10.2 Allocation of Buffer Memories (BFM’s) ..............................................................10-2

10.2.1 BFM List ................................... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... .....................10-2

10.2.2 Communication Format <BFM#0> .......................................................................................10-4

10.2.3 Command

〈

BFM #1

〉 .................................................................................................. 10−8

10.2.4 Receive Upper Limit Byte Count 〈BFM #2

〉 ................................................................... 10−9

10.2.5 Receive Time-out Time <BFM #3>.......................................................................................10-9

10.2.6 Send Header <BFM #5 (upper), BFM #4 (lower)>................................................................10-9

10.2.7 Send Terminator <BFM #7 (upper), BFM #6 (lower)> ..........................................................10-9

10.2.8 Receive Header <BFM #9 (upper), BFM #8 (lower)>.........................................................10-10

10.2.9 Receive Terminator <BFM #11 (upper), BFM #10 (lower)>................................................10-10

10.2.10 Receive Suspension Waiting Time <BFM #12> ...............................................................10-10

10.2.11 Number of Remaining Send Data <BFM #13> .................................................................10-11

10.2.12 Number of Receive Buffers <BFM #14>........................ ...... ....... ...... ....... ...... ....... ...... ...... 10-11

FX communication

xii

10.2.13 Send Sum Result <BFM #15>..........................................................................................10-11

10.2.14 Receive Sum Result <BFM #16>......................................................................................10-11

10.2.15 Time from CS ON to Send Start <BFM #20>....................................................................10-12

10.2.16 Time from Completion of Actual Send to RS OFF (completion flag ON) <BFM #21> ......10-12

10.2.17 Status <BFM #28> ...........................................................................................................10-13

10.2.18 Error Code <BFM #29>.....................................................................................................10-14

10.2.19 Model Code <BFM #30>...................................................................................................10-14

10.2.20 Send Byte Count <BFM #1000>....................................................................................... 10-14

10.2.21 Send Buffers <BFMs #1001 to #1256>.............................................................................10-14

10.2.22 Receive Byte Count <BFM #2000> ..................................................................................10-15

10.2.23 Receive Buffers <BFM #2001 to #2256>................................................. ...... ....... ...... ...... 10-15

10.2.24 Spare Receive Buffers for Interlink Connection Mode <BFM #2257 to #2271> ...............10-15

10.3 Hardware Hand Shake Operation....................................................................10-16

10.3.1 No Hardware Hand Shake..................................................................................................10-16

10.3.2 Standard RS-232C Mode....................................................................................................10-17

10.3.3 Interlink Mode .................................. ...... ....... ...... ....... .............................................. ...........10-18

10.4 Example Program............................................................................................10-19

10.4.1 Example of 16 Bits Data Communication ...........................................................................10-19

10.4.2 Example of 8 Bits Data Communication .......................... ...... ....... ...... ................................10-23

11. Optional Pr o g r amming Port..... ............................................................11-1

11.1 FX2N-422-BD, FX1N-422-BD............................................................................11-1

11.2 FX2N-232-BD FX1N-232-BD FX0N-232ADP and FX2NC-232ADP .................11-2

11.2.1 Connection cables ........................... ...... ....... ...... ....... ...... .....................................................11-2

11.3 Cautions on Use................................................................................................11-3

11.3.1 Cautions on Setting...............................................................................................................11-3

11.3.2 Cautions on use ................................................................................................................... 11-3

12. Diagnostics.................. .. .................... ................... ................... .. ..........12-1

12.1 Common Items..................................................................................................12-1

12.2 N:N Network ......................................................................................................12-2

12.2.1 Error Code ............................................. ....... ...... ....... ...... ...... ....... ...... ..................................12-2

12.2.2 Diagnostics ............................................................................ ....... ........................................12-2

12.3 Parallel Link.......................................................................................................12-3

12.3.1 Diagnostics ............................................................................ ....... ........................................12-3

12.4 Computer Link ...................................................................................................12-4

12.4.1 NAK Error Code....................................................................................................................12-4

12.4.2 Programmable Controller Error Code ...................................................................................12-4

12.4.3 Diagnostics ............................................................................ ....... ........................................12-5

12.5 RS Instruction....................................................................................................12-6

12.5.1 Diagnostics ............................................................................ ....... ........................................12-6

12.6 FX2N-232IF ........................................................................................................12-7

12.6.1 Error code.................... ....... ...... ....... ...... ....... ...... ....... ...... ...... ....... ........................................12-7

12.6.2 Diagnostics ............................................................................ ....... ........................................12-7

12.7 Using Optional Programming Port.....................................................................12-8

12.7.1 FX1S, FX1N and FX

2N(C)

earlier V2.00.......... ...... ....... ...... ...... ....... ...... ....... ...........................12-8

12.7.2 FX

, FX

2NC

whose version is V 2.00 or later......................................................................12-8

Appendix A:

ASCII code Lists................................................................................................... A-1

FX communication

Introduction 1

1-1

1. Introduction

1.1 Abbreviations, Generi c Names and Terms Used in This Manual

Abbreviation List

This manual describes the following product in the new name.

Abbreviation/generic name/term Description

CPU

Series Generic name of FX1S Series main units

Series Generic name of FX0N Series main units

Series Generic name of FX1N Series main units FX Series Generic name of FX Series main units FX

Series Generic name of FX2 Series main units

Series Generic name of FX2N Series main units FX

Series Generic name of FX2C Series main units FX

2NC

Series Generic name of FX

2NC

Series main units

FXCPU

Generic name of FX

/FX0S/FX1S/FX0N/FX1N/FX1/FX/FX2/FX2N/FX2C/

2NC

Series main units

Others

FX/WIN Abbreviation of programming software FX-PCS/WIN-E for FX Series PLC Windows95 Abbreviation of Microsoft Windows95 Windows98 Abbreviation of Microsoft Windows98 Windows NT4.0 Abbreviation of Microsoft Windows NT Workstation 4.0 Windows 2000 Abbreviation of Microsoft Windows 2000 Professional

Windows

Generic name of Windows95, Windows98, Windows NT4.0 and Windows2000

Personal computer (PC)

Personal computer compatible with Windows to which GX Developer or FXPCS/WIN-E is installed

Conventional name New name Remarks

GPPW GX Developer Abbreviation of software package SW"D5C-GPPW-E

FX communication

Introduction 1

1-2

1.2 Communication Types

The FX Series supports the following 5 types of communication. 1 ) N:N network

Data transfer with FX

, FX

2NC

, FX1N, FX1S, FX0N programmable controllers can be performed on a N:N basis. They can link data of a small-scale system if using this network. For the system configuration please refer to subsection 1.2.1, specifications refer to chapter 3, wiring refer to chapter 2, settings and the number of transferred data and example program refer to chapter 4,diagnostics refer to chapter 12.

2 ) Parallel link

Data transfer with FX

, FX

2NC

, FX1N, FX and FX2C programmable controllers can be

performed on a 1:1 bas is for 100 auxiliar y relays and 10 data reg isters. With the FX

and

data transfer is performed for 50 auxiliary relays and 10 data registers. For the system configuration please refer to subsection 1.2.2, specifications refer to chapter 3, wiring refer to chapter 2, setting and example program refer to chapter 5, diagnostics refer to chapter 12.

3 ) Computer link (Data transfer using dedicated protocol)

Data transfer with RS-485 (RS-422) units can be performed on a 1:n (16) basis using dedicated protocol. For the system configuration please refer to subsection 1.2.3, specifications refer to chapter 3, wiring refer to chapter 2, setting of communication format refer to chapter 6, dedicated protocol refer to chapter 7 & 8, diagnostics refer to chapter 12.

4 ) No protocol communication (Data transfer using RS instruction)

Data communication with a diversified RS-232C unit including personal computers, bar code readers and printers can be performed using no protocol communications. This communication uses RS instruction’s or an FX

-232IF special function block. For the system configuration please refer to subsection 1.2.3, specifications refer to chapter 3, wiring refer to chapter 2, setting of communication format, RS ins truction and example program refer to chapter 6 and 9, diagnostics refer to chapter 12. When using the RS ins tructio n, for setting the communicatio n format refer to chapter 6, for the RS instruction and example program please refer to chapter 9. Or when using an FX

232IF, for setting and example progr am please refer to chapter 10.

5 ) Optional programming port

The port can support programming protocol, if connected to an FX

-232-BD, FX0N-232ADP,

2NC

-232ADP, FX1N-232-BD, FX2N-422-BD and FX1N-422-BD for the FX2N, FX

2NC

, FX1N,

Series programmable controller.

For notes on use, refer to chapter 11, diagnostics refer to chapter 12.

FX communication

Introduction 1

1-3

1.3 System Configuration

For programming protocol refer to chapter 11.

1.3.1 N:N Network

1.3.2 Parallel Link

1 ) FX

, FX

2NC

(Shielded twisted-pair cable)

Note:

*1 When including an FX

-485-BD in the system confi gur at ion, thai s , total extension distance

has a max of 50m (164' 0").

FX Series PLC Interface

, FX

2NC

FX0N-485ADP FX

2NC

-485ADP

, FX

FX1N-CNV-BD + FX0N-485ADP FX

-CNV-BD + FX

2NC

-485ADP

-485-BD

FX2N-CNV-BD + FX0N-485ADP FX

-CNV-BD + FX

2NC

-485ADP

-485-BD

####, $$$$

Using interface Extension distance

FX2N-485-BD Max. 50m (164' 0") FX

-CNV-BD + FX0N-485ADP

Max. 500m (1640' 5")

FX2N-CNV-BD + FX

2NC

-485ADP

2NC

FX0N-485ADP FX

2NC

-485ADP

RS-485

communication

equipment

RS-485

communication

equipment

RS-485

communication

equipment

RS-485

communication

equipment

RS-485

communication

equipment

FX PLC FX PLC FX PLC FX PLC FX PLC

Up to eight FX series programmable controllers can be connected. The total extension distance is 500m(1640' 5") when only the FX

-485ADP and FX

2NC

-485ADP

are used in the configuration, and 50m(164' 0") when the FX1N-485-BD and FX2N-485-BD are used.

① ②

FX communication

Introduction 1

1-4

2 ) FX1N (Shielded twisted-pair cabl e)

*2 When including an FX

-485-BD in the system configuration, thais, total extension distanc e

has a max of 50m

(164' 0")

3 ) FX

(Shielded twisted-pair cable)

*3 When including an FX

-485-BD in the system configuration, thais, total extension distanc e

has a max of 50m

(164' 0")

4 ) FX

(Shielded twisted-pair cabl e)

5 ) FX, FX

(Shielded twisted-pair cable and glassfiber cable)

Note;

Parallel link is only possible between the same series of PLC’s, or between other series in th e same group. However, parallel link between each group cannot be achieved. Group’s are separated as follows.

####, $$$$

Using interface Extension distance

FX1N-485-BD Max. 50m (164' 0") FX

-CNV-BD + FX0N-485ADP Max. 500m (1640' 5")

FX1N-CNV-BD + FX

2NC

-485ADP

####, $$$$

Using interface Extension distance

FX1N-485-BD Max. 50m (164' 0") FX

-CNV-BD + FX0N-485ADP Max. 500m (1640' 5")

FX1N-CNV-BD + FX

2NC

-485ADP

####, $$$$

Using interface Extension distance

FX0N-485ADP

Max. 500m (1640' 5")

2NC

-485ADP

####, $$$$

Using interface Extension distance

, FX

FX2-40AW (Shielded twisted-pair cable) Max. 10m (32' 9") FX

-40AP (Glassfiber cable) Max. 50m (164' 0")

Group No. Series

Group 1 FX

, FX

2NC

Group 2 FX

Group 3 FX

Group 4 FX

Group 5 FX, FX

FX communication

Introduction 1

1-5

1.3.3 Computer Link

1 ) In the case of 1:N connection using RS-485 (RS-422)

2 ) In the case of 1:1 connection using RS-232C

Up to sixteen FX series programmable controllers can be connected. The total extension distance is 500m(1640' 5") when only the FX0N-485ADP and FX

2NC

-485ADP are used

in the configuration, and 50m(164' 0") when the FX1N-485-BD and FX2N-485-BD are used.

FX0N,FX

2NC

FX2N + FX2N-CNV-BD, FX

+ FX1N-CNV-BD,

+ FX1N-CNV-BD

2NC

-485ADP,

FX0N-485ADP

FX2, FX

FX-485ADP

A series PLC + A

(1S)

J71UC24

+ FX2N-485-BD,

+ FX1N-485-BD,

+ FX1N-485-BD

Computer

RS-232C

FX-485PC-IF

RS-485(RS-422)

Total extension distance is 15m(49' 2").

Computer

2NC

,FX

FX1N,FX

FX2,FX

:FX2N-232-BD FX2N-CNV-BD+FX0N-232ADP FX2N-CNV-BD+FX

2NC

-232ADP

:FX

-232ADP

2NC

-232ADP :FX1N-232-BD, FX1N-CNV-BD+FX0N-232ADP FX1N-CNV-BD+FX

2NC

-232ADP

:FX-232ADP

FX communication

Introduction 1

1-6

1.3.4 No Protocol Communication

*1 The RS-485/RS-232C signal co nvertor is necessary in the case of an R S-485 interface for a

computer connection.

*2 When using an FX

-485-BD a FX2N-485-BD in a s ystem the total extension distance has a max of 50m(164' 0"). But, RS-485/RS-232C signal convertor is necessary in the case of an RS-232C interface for a computer connection.

*3 This system configuration can achieve full-duplex or half-duplex communication. *4 This system configuration can only achieve half-duplex communication.

1.4 Supported Functio n s and Applicable Versions

Items

2NC

FX1N, FX

FX, FX

N:N network

All versions

V2.00 or more No support Parallel link All versions All versions Computer link V1.20 or more V3.30 or more

No protocol communication

Use RS instruction All versions V3.00 or more Use FX

-232IF Not supported.

FX2N-CNV-BD

FX, FX

FX2N-232-BD

FX0N-232ADP,FX

2NC

-232ADP

RS-232C

FX2N + FX2N-CNV-BD FX1N + FX1N-CNV-BD FX1S + FX1N-CNV-BD FX0N, FX

2NC

FX2N + FX2N-485-BD

FX-232ADP

FX0N-485ADP,FX

2NC

-485ADP

Max 15m(49' 2") *1

Max 500m (1640' 5") *2

FX1N + FX1N-CNV-BD FX1S + FX1N-CNV-BD

FX0N-232ADP,FX

2NC

-232ADP

*4 *3

Personal computer

Bar code reader

Printer

2NC

FX0N-232ADP,FX

2NC

-232ADP

FX1N + FX1N-485-BD FX1S + FX1N-485-BD

% %

+ FX1N-232-BD FX1S + FX1N-232-BD

% % % %

% %

FX2N, FX

2NC

+ FX

2NC

-CNV-IF

FX2N-232IF

RS-485(RS-422)

FX communication

Specifications 2

2-1

2. Specifications

2.1 Communication Specification

*1 FX2N, FX

2NC

, FX1N, FX1S and FX0N PLCs are supported.

*2 When using an FX

-485ADP or FX

2NC

-485ADP, this system is only half-duplex.

N:N network Parallel lin k

Computer

link

(dedicated

protocol)

No protocol commu nica tion

Transmission standard

Conforming to

RS-485

Conforming to RS-485

and RS-422

Conforming to RS-485 and RS-422 or

RS-232C

Transmission distance Max. 500m

RS-485(RS-422): Max. 500m(1640' 5") RS-232C: Max. 15m (49' 2")

Number of stations Max. 8 stations 1:1

1:N

(N is Max. 16

stations

RS-232C:1:1 RS-485:1:N

Communication method Half-duplex comm un ic ati on

FX, FX2C, FX0N, FX1N, FX1S: half-duplex communication

FX2N, FX

2NC

: full-duplex

communication

Data length

Fixed

7 bit / 8 bit

Parity None / Odd / Even

Stop bit 1 bit / 2bit

Baud rate (bps) 38,400 19,200 300/600/1,200/2,400/4,800/9,600/19,200

Header character

Fixed

None / effective

Terminator character

Control line



Protocol



Format 1 /

Format 4

None

Sum check Fixed

None /

effective

Supported programmab le

controller

, FX

2NC

, FX1S, FX

FX2N, FX

2NC

, FX1N, FX1S, FX0N, FX, FX

FX communication

Specification 2

2-2

2.2 Communicatio n Ti m e

2.2.1 N:N network

Note;

If a N:N network is used, the scan time of each station programmable controller becomes about 10 percent longer regar dless of the number of link s tations or the communication device pattern used.

2.2.2 Parallel link

Communication de vice

Pattern 0

Bit device: 0 point

Word device: 4 points

Pattern 1

Bit device: 32 points

Word device: 4 points

Pattern 2

Bit device: 64 points

Word device: 8 points

Total station number

2 18 22 34 3 26 32 50 4 33 42 66 5 41 52 83 6 49 62 99 7 57 72 115 8 65 82 131

Normal Mode

70ms for reciprocation + Operation cycle of master station

+ Operation cycle of slave station (ms)

High speed mode

20ms for reciprocation + Operation cycle of master station

+ Operation cycle of slave station (ms)

FX communication

Specifications 2

2-3

2.2.3 Computer link

Calculations to determine the approximate time until communication is complete. 1 ) Programmable controller

→

Computer

Communication time = Total number of characters based on dedicated protocol

Time to send or receive one character (ms)*2

+ Programmable controller’s maximum scan time (ms)

+ Message wait (ms)

2 ) Computer

→

Programmable controller

Communication time = Number of total characters based on dedicated protocol

Time to send or receive one character (ms)*2 + Programmable controller’s maximum scan time (ms) + Message wait (ms)

Note:

*1 Please count the number of characters with ref erence section 7.4.1 and 7.4.2 and chapter 8. *2 Please refer to the following expression for time calculati on.

Time to send or receive one character = 1/baud rate

number of bits in character

(start bit(1) + Data length(7 or 8) + Parity bit(0 or 1) + Stop bit(1 or 2))

Example

When 1 character = 10 bits (Data length = 7, Parity bit = 1, stop bit = 1 start bit = 1), the time is as follows.

Note;

Please refer to following table fo r the relation between read ing word points and com munication time. “Message time = 0ms, Maximum scan time = 20ms, Dedicated protocol format = format 1, Command = WR, Baud rate = 9,600 or 19,200 bps”

Baud rate (bps) Time to send or receive one character (ms)

300 33.34

600 16.67 1200 8.34 2400 4.17 4800 2.08 9600 1.04

19200 0.52

Reading word points

Baud rate (bps)

9,600 19,200

10 0.3 s 0.2 s 32 0.4 s 0.3 s 64 0.5 s 0.4 s

FX communication

Specification 2

2-4

MEMO

FX communication

Wiring 3

3-1

3. Wiring

Terminal layout when using a communication unit, please refer to the individual units manual.

Common

1 ) This system is designed to read and write data (forced on/off) while the programmable

controller is running. If abnormal data is written to the programmable controller, due to effects of noise, the programmable controller may malfunction and cause machine trouble or a n accident. Therefore, observe the following cautions.

• Do not lay signal cables near high voltage power cables or put them in the same trunking duct. Otherwise effect s of noise or surge induction are likely to take place. Keep a safe distance of more than 100 mm (3.94") from these wires.

• Ground the shield wire or shield of a shielded cable at one poi nt on the programmable controller. Do not, however, ground at the same point as high voltage lines.

2 ) Cut off phases of power source externally, before installation or wiring work in order to avoid

electric shock or serious damage to the product.

3 ) Replace the provided terminal cover before supplying power and operating the unit after

installation or wiring work in order to avoid electric shock.

FX communication

Wiring 3

3-2

3.1 Caution on cable selection

3.1.1 FX1N-485-BD, FX2N-485-BD, FX

2NC

-485ADP

Number of cables connected to terminal and their specification

3.1.2 FX

-485ADP

3.1.3 FX

-40AW

1 ) The terminal screws for the terminal bl oc k of the FX

-40A W are M3.5 s crews, theref ore crimp style terminal (see drawing) suitable for use with these screws should be fitted to th e cable for wiring.

2 ) The ter minal tightening torque is 0.5 to 0.8 N⋅m (5 to 8 kgf⋅cm), tighten securely to avoid

malfunction.

FX1N-485-BD, FX2N-485-BD FX

2NC

-485ADP

When connecting 1 cable

AWG26-16

AWG26-16 When connecting 2 cables AWG26-20 Tightening torque 0.6N%m 0.4 to 0.5N%m

6mm(0.23")

-485-BD,FX2N-485-BD

8mm(0.32")

2NC

-485ADP

To connect the RS-485(RS-422) unit, use a shielded twist-pair cable. The cable model must be A WG 26 to 16, and the maximum tightening tor que must be 0.6 N%m (6 kgf%cm). If a cable other than the AWG 26 to 16 is used, normal communication cannot be assured as the terminal may be imperfectly contacted. It is recommended to insert a cable integrated by a crimping tool into the terminal.

For M3

6.2mm (0.24 inches) or less

For M3

1 ) The terminal screws of the FX

(0N)

-485ADP are M3 screws, therefore, crimp style terminal

(see drawing) suitable for use with these screws should be fitted to the cable for wiring.

2 ) The terminal tightening torque is 0.5 to 0.8 N⋅m (5 to 8 kgf⋅cm), tighte n securely to avoid

malfunction.

For M3.5

6.8mm (0.27 inches) or less

For M3.5

FX communication

Wiring 3

3-3

3.2 Using RS-232C Interface

Below is a typical wiring example. Please wire similar to the following pin name, when a pin number on the side of a counterpart machine differs.

3.2.1 Using RS Instruction or Computer Link

1 ) Terminal specification device

Note; When using ER and DR signals, please also chec k if RS and CS signals are needed according to the RS-232C device specifications.

2 ) Modem specification device

Note; The FX

-232ADP and FX

2NC

-232ADP does not monitor the CD pin (pin8).

3 ) Computer link

Please refer to 2.2.1 1) for wiring.

RS-232C Device Side

Signal

name

RD(RXD)

SD(TXD)

RSRTS)

SG(GND)

CS(CTS)

Uses CS, RS

2 3 7 5 8

9-pin

D-SUB

25-pin

D-SUB

1 3 2 4 7 5

Uses DR, ER

9-pin D-

SUB

25-pin

D-SUB

2 3 4 5 6

1 3 2

7 6

Signal

name

FG RD(RXD) SD(TXD) ER(DTR) SG(GND) DR(DSR)

Programmable Controller Side

Signal

name

FX0N-

232ADP

FX-

232ADP

- 1

RD(RXD)

SD(TXD)

ER(DTR) SG(GND) DR(DSR)

FX2N-232-BD FX

-232-BD

2 3 4 5 6

3 2

7 6

2NC

232ADP

Programmable Controller Side

2NC

232ADP

FX-

232ADP

- 1

RS-232C Device Side

Uses CS, RS Uses DR, ER

- 8

Signal

name

RD(RXD)

SD(TXD)

ER(DTR) SG(GND) DR(DSR)

CD(DCD)

FX2N-232-BD FX

-232-BD

FX0N-

232ADP

3 2

7 6

Signal

name

RD(RXD)

SD(TXD) RS(RTS)

SG(GND)

CS(CTS)

CD(DCD)

2 3 7 5 8

9-pin

D-SUB

25-pin

D-SUB

3 2 4 7 5

Signal

name

RD(RXD) SD(TXD) ER(DTR) SG(GND) DR(DSR)

9-pin

D-SUB

2 3 4 5 6

25-pin

D-SUB

3 2

7 6

8 2 3 4 5 6

FX communication

Wiring 3

3-4

3.2.2 Using FX2N-232IF

The signal wiring o f the RS-232C equipmen t varies depending on the RS-232C connection specifications. Check the specifications of the RS-232C equipment used, then connect the signals correctly. Representative wiring examples are shown below.

1 ) Terminal specification device (No control line)

Setting communication format (BFM #0); b9=0, b8=0

Communication is performed in accordance with the condition determined by the software in the FX

-232IF and the

counterpart equipment.

2 ) Terminal specification device (Use control line)

a ) Standard RS-232C mode (Use cross cable)

Setting communication format (BFM #0); b9=0, b8=1

As the carrier to send (CS) signal pin of the FX

-232IF itself receives the request to send (RS) signal, signal tr ansfer is performed as if the counterpart equipment is functioning.

Note:

*1 When the CD signal is not monitored, the CD signal pin is not required to be connected.

With regard to the CD signal, the FX

-232IF only indicates the status.

*2 The FX

-232IF only indicates the status.

Programm able Controller Side

Signal

name

RD (RXD)

SD (TXD)

SG (GND)

FX2N-232IF

RS-232C D evice Side

Signal

name

RD (RXD)

SD (TXD)

SG (GND)

9-pin

D-SUB

25-pin

D-SUB

Programm able Controller Side

Signal

name

RD (RXD)

SD (TXD)

RS (RTS)

FX2N-232IF

RS-232C D evice Side

Signal

name

9-pin

D-SUB

25-pin

D-SUB

CD (DCD)

CS (CTS)

ER (DTR)

20 6 5

6 7

DR (DTR)

SG (GND)

6 5

RD (RXD)

SD (TXD)

RS (RTS)

CD (DCD)

CS (CTS)

ER (DTR) DR (DTR) SG (GND)

*1 *1

*2 *2

FX communication

Wiring 3

3-5

b ) Interlink connection mode (Use interlink serial cross cable)

Setting connection format (BFM #0); b9=1, b8=1

In the interlink connection mode, data exceeding 512 bytes (upper limit of the receive buff er in the FX

-232IF) can be

received.

Note:

*1 The FX

-232IF only indicates the status.

*2 In this mode, the request to send (RS) signal func tions as the signal to enable receive in

the FX

-232IF.

When receiving data exceeding 512 bytes, the FX

-232IF sets the request to send (RS) signal to “OFF” and requests the counterpart equipment to suspend the send operation. When the data saved in the receive buffers is read by the sequence program, the remaining data can be receiv ed.

3 ) Modem specification device

Standard RS-232C mode (Using straight cable) Setting communication format (BFM #0); b9=0, b8=1

Note:

*1 The FX

-232IF indicates the status exclusively.

*2 When the CD signal is not monitored, the CD signal pin is not required to be connected.

With regard to the CD signal, the FX

-232IF indicates the status exclusively.

*3 When the CI signal is not required, the CI signal pi n is not required to the connected. With

regard to the CI signal, the FX

-232IF indicates the status exclusively.

Programm able Controller Side

Signal

name

RD (RXD)

SD (TXD)

RS (RTS)

FX2N-232IF

RS-232C D evice Side

Signal

name

9-pin

D-SUB

25-pin

D-SUB

4 CS (CTS) ER (DTR)

8 4

20 6 5

6 7

DR (DTR)

SG (GND)

6 5

RD (RXD)

SD (TXD)

RS (RTS) CS (CTS)

ER (DTR) DR (DTR) SG (GND)

*1 *1

*2 *2

Programm able Controller Side

Signal

name

RD (RXD)

SD (TXD)

RS (RTS)

FX2N-232IF

RS-232C D evice Side

Signal

name

9-pin

D-SUB

25-pin

D-SUB

CD (DCD)

CS (CTS)

ER (DTR)

20 6 5

6 7

DR (DTR)

SG (GND)

6 5

RD (RXD)

SD (TXD)

RS (RTS)

CD (DCD)

CS (CTS)

ER (DTR) DR (DTR) SG (GND)

*1 *1

*2 *2

9 22C I (R I) 9 CI (RI)

*3 *3

FX communication

Wiring 3

3-6

3.3 Using RS-485 Interface

3.3.1 Wiring Selection

The wiring of RS-485 can either be one-pair or two-pair. The wiring method is decided according to application usage. Please select the wiring method from the table below.

…

Recommendation,

…

OK, ×…Cannot use

Note:

*1 When this product is added to the system, please match the wir ing to the existing method of

the system.

*2 When using an FX

-485-BD with this wiring method, remember to take account of/or ignore

the “echo” of the commands sent from the FX

programmable contr oller.

*3 Please use the FX

programmable cont roller and FX2N-485-BD together.

Full-duplex combination cannot be achieved with other configurations.

*4 For wiring parallel link, see section 2.4.

3.3.2 T erminal Resistor

A terminal resistor must be used at both ends of the communication line as described in section

2.3.3 and 2.3.4.

Usage One-pair wiring Two-pair wiring

No protocol (Use RS instruction) *1

Half-duplex communication

Full-duplex communication *3

Dedicated protocol (Use computer link)*1

It is necessary to set the message wait time to 70 ms or less.

It is not necessary to set the massage wait time to 70 ms or less.

Use the on-demand function

Parallel link *4

N:N network

Orange Orange Brown

Brown Brown Brown

330

Ω

1/4 W

110

Ω

1/2 W

1 )In the case of two-pair wiring, connect the terminal resistor

(330

Ω

, 1/4W) between terminals SDA and SDB and between terminals RDA and RDB. Use the resistors offered as accessories with the product.

2 )In the case of one-pair wiring, connect the terminal resistor

(110

Ω

, 1/2W) between terminals RDA and RDB. Use the

resistors offered as accessories with the product.

FX communication

Wiring 3

3-7

3.3.3 One-pair Wiring

Note:

*1 R is a terminating resistor (110Ω) *2 Make sure to connect the shield of the appropriate cable with the FX

-485-BD, FX1N-485-BD

or FX

2NC

-485ADP to ground that has a resistance of 100Ω or less (Class D grounding).

*3 Make sure to connect the terminal FG to the ground terminal of a programmable

controller grounded with resistance of 100Ω or less (Class D grounding). However, for a computer link unit of the A series programmable controller, see the manual of the computer link unit.

*4 When using an RS-232C/485 converter, use the FX-485PC-IF.

Have in mind that "echo" occurs on the RS-232C side if one-pair wiring is performed using the FX-485PC-IF.

*5 In the case of FX

2NC

-485ADP

Class D grounding

R*1

SDA

SDB

RDA

RDB

SDA

SDB

RDA

RDB

SDA

SDB

RDA

RDB

LINK

SDA SDB

RDA

RDB

R*1

RS-485 unit *4

(NC)*5

2NC

-485ADP

-485-BD,FX2N-485-BD

A series programmable

(0N)

-485ADP

controller's computer link unit

Station

No. 0

Station

No. 1

Station

No. 15

FX communication

Wiring 3

3-8

3.3.4 Two-pair Wiring

Note:

*1 R is a terminating resistor (330Ω) *2 Make sure to connect the shield of the appropriate cable with the FX

-485-BD, FX1N-485-BD

or FX

2NC

-485ADP to ground that has a resistance of 100Ω or less (Class D grounding).

*3 Make sure to connect the terminal FG to the ground terminal of a programmable

controller grounded with resistance of 100Ω or less (Class D grounding). However, for a computer link unit of the A series programmable controller, see the manual of the computer link unit.

*4 When using an RS-232C/485 converter, use the FX-485PC-IF. *5 In the case of FX

2NC

-485ADP

Class D grounding

R*1

SDA

SG *3

Station

No. 1

Station

No. 0

Station

No. 15

R*1

RS-422/RS-485 unit *4

(NC)*5

2NC

-485ADP

-485-BD,FX2N-485-BD

A series programmable

(0N)

-485ADP

controller's computer link unit

SDB

RDA

RDB

SDA

SDB

RDA

RDB

SDA

SDB

RDA

RDB

LINK

SDA

SDB

RDA

RDB

FX communication

Wiring 3

3-9

3.4 Parallel Link

3.4.1 FX

2N(1N)

-485-BD and FX0N-485ADP

1 ) One-pair Wiring

Note:

*1 Connect the terminal FG to the ground terminal of a programmable controller grounded

with a resistance of 100Ω or less (Class D grounding). If the programmable controller is not equipped with a ground terminal, con nect the terminal FG dir ectly to a gr ound with the resistance of 100Ω or less (Class D grounding).

2 ) Two-pair Wiring

Note:

*1 Connect the terminal FG to the ground terminal of a programmable controller grounded

RDB

RDA

SDA

SDB

SDA

-485-BD

Terminating resistor 110

Ω

FX0N-485ADP

Terminating registor 110

Ω

RDA

RDB

SDB

LINK

FG *1

RDB

RDA

SDA

SDB

SDA

-485-BD

Terminating resistor 330

Ω

FX0N-485ADP

Terminating resistor 330

Ω

RDA

RDB

SDB

LINK

FG *1

Terminating resistor 330

Ω

Terminating resistor 330

Ω

FX communication

Wiring 3

3-10

3.4.2 FX0N-485ADP and FX0N-485ADP

1 ) One-pair Wiring

Note:

*1 Connect the terminal FG to the ground terminal of a programmable controller grounded

2 ) Two-pair Wiring

Note:

*1 Connect the terminal FG to the ground terminal of a programmable controller grounded

RDB

RDA

SDA

SDB

SDA

Terminating resistor 110

Ω

FX0N-485ADP

Terminating resistor 110

Ω

RDA

RDB LINK

SDB

LINK

FG *1FG

-485ADP

RDB

RDA

SDA

SDB

SDA

-485ADP

Terminating resistor 330

Ω

FX0N-485ADP

Terminating resistor 330

Ω

RDA

RDB LINK

SDB

LINK

FG *1FG

Terminating resistor 330

Ω

Terminating resistor 330

Ω

FX communication

Wiring 3

3-11

3.4.3 FX

2N(1N)

-485-BD and FX

2N(1N)

-485-BD

1 ) One-pair Wiring

2 ) Two-pair Wiring

RDB

RDA

SDA

SDB

SDA

Terminating resistor 110

Ω

Terminating resistor 110

Ω

RDA

RDB

SDB

FX2N-485-BD,

-485-BD

Class D grounding

-485-BD,

-485-BD

RDB

RDA

SDA

SDB

SDA

Terminating resistor 330

Ω

Terminating resistor 330

Ω

RDA

RDB

SDB

Terminating resistor 330

Ω

Terminating resistor 330

Ω

Class D grounding

-485-BD,

-485-BD

-485-BD,

-485-BD

FX communication

Wiring 3

3-12

3.4.4 FX

2NC

-485ADP and FX0N-485ADP

1 ) One-pair Wiring

Note:

*1 Connect the terminal FG to the ground terminal of a programmable controller grounded

2 ) Two-pair Wiring

Note:

*1 Connect the terminal FG to the ground terminal of a programmable controller grounded

SDB

SDA

RDA

SDA

SDB

RDA

RDB RDB

LINK

FX0N-485ADP

2NC

-485ADP

Terminating resistor 110

Ω

Terminating resistor 110

Ω

SDB

SDA

RDA

SDA

SDB

RDA

RDB

LINK

FX0N-485ADP

2NC

-485ADP

Terminating resistor 330

Ω

Terminating resistor 330

Ω

Terminating resistor 330

Ω

Terminating resistor 330

Ω

FX communication

Wiring 3

3-13

3.4.5 FX

2N(1N)

-485-BD and FX

2NC

-485ADP

1 ) One-pair Wiring

2 ) Two-pair Wiring

SDB

SDA

RDA

SDA

SDB

RDA

RDB

FX2N-485-BD, FX

-485-BD

Class D grounding

2NC

-485ADP

Terminating resistor 110

Ω

Terminating resistor 110

Ω

SDB

SDA

RDA

SDA

SDB

RDA

RDB

-485-BD,

-485-BD

Class D grounding

2NC

-485ADP

Terminating resistor 330

Ω

Terminating resistor 330

Ω

Terminating resistor 330

Ω

Terminating resistor 330

Ω

FX communication

Wiring 3

3-14

3.4.6 FX

2NC

-485ADP and FX

2NC

-485ADP

1 ) One-pair Wiring

2 ) Two-pair Wiring

SDB

SDA

RDA

SDA

SDB

RDA

RDB

Class D grounding

2NC

-485ADPFX

2NC

-485ADP

Terminating resistor 110

Ω

Terminating resistor 110

Ω

SDB

SDA

RDA

SDA

SDB

RDA

RDB

2NC

-485ADP

Class D grounding

2NC

-485ADP

Terminating resistor 330

Ω

Terminating resistor 330

Ω

Terminating resistor 330

Ω

Terminating resistor 330

Ω

FX communication

Wiring 3

3-15

3.4.7 FX2-40AW and FX2-40AW

3.4.8 FX

-40AP and FX2-40AP

SASA

FX2-40AW FX2-40AW

Note:

*1 Connect the terminal SG to the terminal SG of

the basic unit. Two SG terminals are connected to each other internally.

-40AP FX2-40AP

Note:

• " " indicates an optical connector. Keep optical connectors away from cabling carrying high loads. Output terminals (Y000 to Y003) located near optical connectors must have light loads connector.

FX communication

Wiring 3

3-16

MEMO

FX communication

N:N network 4

4-1

4. N:N Network

For diagnostics, please refer to chapter 12 .

4.1 Related Flags and Data Registers

4.1.1 Auxiliary Relays

R : Read only W : Write only M : Master station L : Slave station

Note:

*1 The number of communication errors that have occurred in each station cannot be counted in

the CPU error status, the program error status or the stop status.

*2 Number in accordance with the slave station No.

Example: FX

, FX

……………

Slave station No.1 is M505, Slave station No.2 is M506,

~ Slav e station No.7 is M511.

, FX2N, FX

……

Slave station No.1 is M8184, Slave station No.2 is M8185,

~ Slave station No.7 is M8190.

Attribute

Auxiliary relays

Name Description

Response

type

FX0N,

FX1N, FX2N,

2NC

R M8038

N:N network parameter setting

Used to set N:N network parameters

M, L

R M504 M8183

Communication error of master station

ON when communication error occurs in the master station.

M505 to M511

M8184 to M8190

Communication error of slave station

ON when communication error occurs in the slave station.

M, L

R M503 M8191 Data communication

ON when communicating to another station.

M, L

Note:

• Devices M503 to M511 in the FX

and FX1S cannot be used in the program.

These devices are used by the N:N network.

FX communication

N:N network 4

4-2

4.1.2 Data Registers

R : Read only W : Write only M : Master station L : Slave station *1 The number of communication errors oc curred in its own station cannot be counte d in the

CPU error status, the program error status or the stop status.

*2 Number (Same meaning but looks better.) in accordance with the sla ve station No.

Slave station No.1 is D204, D212, slave station No.2 is D205, D213,

…

slave station No.7 is D210, D218.

*3 Number (Same meaning but looks better.) in accordance with the sla ve station No.

Slave station No.1 is D8204, D8212, slave station No.2 is D8205, D8213,

…

slave station No.7 is D8210, D8218.

Attribute

Data Registers

Name Description

Response

type

FX0N,

FX1N, FX2N,

2NC

R D8173 Station No. Saves its own station No. M, L R D8174

Total number of slave stations

Saves total number of slav e stations

M, L

R D8175 Refresh range Saves refresh range M, L

W D8176 Station number setting Sets its own station No. M, L W D8177

Total slave station number setting

Sets total number of slav e stations

W D8178 Refresh range setting Sets refresh range M W/R D8179 Retry count setting Sets retry count M W/R D8180 Comms time-out setting Sets comms time-out M

R D201 D8201 Current network scan time

Saves current network scan time

M, L

R D202 D8202

Maximum network scan time

Saves maximum network scan time

M, L

R D203 D8203

Number of communication error at master station

Number of communication error at master station *1

D204 to D210 *2

D8204 to D8210 *3

Number of communication error at slave station

Number of communication error at slav e station *1

M, L

R D211 D8211

Code of communication error at master station

Code of communication error at master station *1

D212 to D218 *2

D8212 to D8218 *3

Code of communication error at slave station

Code of communication error at slave station *1

M, L



D219 to

D255



Not used For internal processing



Note;

• Devices M503-M511 and D201-D255 in the FX

and FX1S cannot be used in the

program. These devices are used by the N:N network.

FX communication

N:N network 4

4-3

4.2 Setting

N:N settings beco me valid when the program is r un or when the power of the programmable controller is turned ON.

4.2.1 Setting the Station No. (D8176)

Set a value 0 to 7 to the special data register D8176.

4.2.2 Setting the Total Number of Slave Stations (D8177)

Set value Description

0 Master station

1 to 7

Slave station No. Example: 1 is slave station No.1, 2 is slave station No.2

Set a value 1 to 7 to the special data register D8177. (Default = 7) This setting is not required for the slave station.

Set value Description

1 slave station

2 slave stations

7 slave stations

FX communication

N:N network 4

4-4

4.2.3 Setting the Refresh Range (D8178)

Set a value 0 to 2 to the special data register D8178. (Default = 0) This setting is not required for the slave station. The devices used in each pattern are occupied b y all the stations for the N:N network.

1 ) In the case of pattern 0 (FX

, FX1S, FX1N, FX2N, FX

2NC

)

Communication

device

Refresh range

Pattern 0

(FX

, FX1S, FX1N,

, FX

2NC

)

Pattern 1

(FX

, FX2N, FX

2NC

)

Pattern 2

(FX

, FX2N, FX

2NC

)

Bit device (M) 0 point 32 points 64 points

Word device (D) 4 points 4 points 8 points

Station No.

Device No.

Bit device (M) Word device (D)

0 point 4 points

No.0



D0 to D3

No.1



D10 to D13

No.2



D20 to D23

No.3



D30 to D33

No.4



D40 to D43

No.5



D50 to D53

No,6



D60 to D63

No.7



D70 to D73

Note;

• Please set the refresh range to patt ern 0. When setting it other t han pat tern 0, all FX

and FX1S series units in the system experience a communications error. In this case, please note that link time becomes as long as the FX

and FX

communication error is occurring.

FX communication

N:N network 4

4-5

2 ) In the case of pattern 1 (FX1N, FX2N, FX

2NC

)

3 ) In the case of pattern 2 (FX

, FX2N, FX

2NC

)

4.2.4 Setting Retry Count (D8179)

Set a value 0 to 10 to the special data register D8178. (Default = 3) This setting is not required for the slave station. If a master station tries to communicate with the slave station at this retry count (or over), communication error occur in the station.

4.2.5 Setting Comms Time-out (D8180)

Set value 5 to 255 to the special dat a register D8179. (Default = 5) This value multiplied by 10(ms) is duration of the comms time-out. Comms time-out is the communication dwell time between the master station and slave station.

Station No.

Device No.

Bit device (M) Word device (D)

32 points 4 points

No.0 M1000 to M1031 D0 to D3 No.1 M1064 to M1095 D10 to D13 No.2 M1128 to M1159 D20 to D23 No.3 M1192 to M1223 D30 to D33 No.4 M1256 to M1287 D40 to D43 No.5 M1320 to M1351 D50 to D53 No.6 M1384 to M1415 D60 to D63 No.7 M1448 to M1479 D70 to D73

Station No.

Device No.

Bit device (M) Word device (D)

64 points 8 points

No.0 M1000 to M1063 D0 to D7 No.1 M1064 to M1127 D10 to D17 No.2 M1128 to M1191 D20 to D27 No.3 M1192 to M1255 D30 to D37 No.4 M1256 to M1319 D40 to D47 No.5 M1320 to M1383 D50 to D57 No,6 M1384 to M1447 D60 to D67 No.7 M1448 to M1511 D70 to D77

FX communication

N:N network 4

4-6

4.2.6 Program Used for Setting

Make sure to write the program above step 0 as the N:N network parameter setting program. This program does not require to be executed, because it becomes effective automatically when it is programmed in this position.

M8038

FNC 12

MOV

K 0 D8176

Station No. setting: Required for master station (Set range: 0 to 7)

FNC 12

MOV

K 2 D8177

Total number of slave stations: 2 (Setting range: 1 to 7)

FNC 12

MOV

K 1 D8178

Refresh range setting: Pattern 1 (Set range: 1 to 2)

FNC 12

MOV

K 3 D8179

Retry count setting: 3 (3times)

FNC 12

MOV

K 6 D8180

Comms time-out setting: 6 (60ms)

Not required for slave station

Note:

• Setting of the parameters for the N:N network is started at step 0 (LD M8038), and finished when any instruction or device other than the program above is processed.

FX communication

N:N network 4

4-7

4.3 Example Program

4.3.1 System Configuration

• Refresh range: 32 bit devices and 4 word devices (Pattern 1)

• Retry count: 3 times

• Comms time-out: 5 (50 ms)

4.3.2 Operations

The following operations are performed in the system configuration above. 1 ) The input points X000 to X003 (M1000 to M1003) in the master station are output to the

output points Y010 to Y013 in the stations Nos.1 and 2.

2 ) The input points X000 to X003 (M1064 to M1067) in the station No.1 are output to the output

points Y014 to Y017 in the master station and the station No.2.

3 ) The input points X000 to X003 (M1128 to M1131) in the station No.2 are output to the output

points Y020 to Y023 in the master station and the station No.1.

4 ) The data register D1 in the master station is specified as the set value of the counter C1 in

the station No.1. The contact (M1070) status of the counter C1 is reflected on the output point Y005 in the master station.

5 ) The data register D2 in the master station is specified as the set value of the counter C2 in

the station No.2. The contact (M1140) status of the counter C2 is reflected on the output point Y006 in the master station.

6 ) The value of the data register D10 in the station No.1 and the value of the data register D20

in the station No.2 are added in the master station, and saved to the data register D3.

7 ) The value of the data register D10 in the master station and the value of the data register

D20 in the station No.2 are added in the station No.1, and saved to the data register D11.

8 ) The value of the data register D10 in the master station and the value of the data register

D10 in the station No.1 are added in the station No.2, and saved to the data register D21.

FX2N-485-BD FX2N-485-BD FX2N-485-BD

Master station (No.0) Slave station (No.1) Slave station (No.2)

FX communication

N:N network 4

4-8

4.3.3 Example of Setting Program

For the setting program of the master station and the stations Nos.1 and 2, refer to the program below.

4.3.4 Example of Error Program

* A station cannot recognize its own error. An error program for each station is not necessary.

Master station Slave station No.1 Slave station No.2 Remarks

D8176

K0 K1 K2 Station No.

D8177



Total slave station : 2 stations

D8178



Refresh range : Pattern 1

D8179



Retry count : 3 times (default)

D8180



Comms time-out : 50 ms (default)

Not required for slave station

M8038

FNC 12

MOV

K 0 D8176

Station No. setting: Required for master station (Set range: 0 to 7)

FNC 12

MOV

K 2 D8177

Total number of slave stations: 2 (Setting range: 1 to 7)

FNC 12

MOV

K 1 D8178

Refresh range setting: Pattern 1 (Set range: 1 to 2)

FNC 12

MOV

K 3 D8179

Retry count setting: 3 (3times)

FNC 12

MOV

K 5 D8180

Comms time-out setting: 5 (50ms)

M8183

Master communication error

Y000

M8184

Slave 1 communication error

Y001

M8185

Slave 2 communication error

Y002

M8191

Data communication

Y003

Continued to a), b) or c) in "4.3.5 Program".

FX communication

N:N network 4

4-9

4.3.5 Example of Operation Program

a ) Program of master station

Slave 1 communication error

M8184

Slave 2 communication error

M8185

Contact of slave 2 C2 device

M1140

Y006

Operation 6)

Operation 7), 8)

Operation 5)

Slave 2 communication error

M8185

END

RUN monitor

M8000

Slave 1 communication error

M8184

Slave 2 communication error

M8185

Slave 1 communication error

M8184

Contact of slave 1 C1 device

M1070

Y005

Operation 1)

Operation 2)

Operation 3)

Operation 4)

D 0

D 2

D 3

K1M1000

K1Y014

K1Y020

D 1

K 10

K1X000

K1M1064

K1M1128

K 10

FNC 12

MOV

FNC 12

MOV

FNC 12

MOV

FNC 12

MOV

FNC 12

MOV

FNC 12

MOV

FNC 12

MOV

FX communication

N:N network 4

4-10

b ) Program of slave station No.1

Master communication error

M8183

K1M1000 K1Y010

Counter reset

Counter input

X000

C 1

RST C 1

K1X000

K1M1064

K1M1128 K1Y020

Slave 2 communication error

M8185

D 1

C 1

Y005

M1070

Operation 4)

X001

Slave 2 communication error

M8185

K 10

D 10

Contact of slave 2 C2 device

M1140

Y006

END

D 20 D 11D 0

M8185

Operation 6), 8)

Operation 7)

Operation 1)

Operation 2)

Operation 3)

Operation 5)

FNC 12

MOV

FNC 12

MOV

FNC 12

MOV

FNC 12

MOV

FNC 20

ADD

FX communication

N:N network 4

4-11

c ) Program of slave station No.2

Master communication error

M8183

Counter reset

RST C 2

FNC 12

MOV

FNC 12

MOV

Slave 1 communication error

M8184

Y005

Contact of slave 1 C1 device

Slave 1 communication error

M8184

M1070

FNC 12

MOV

K 10 D 20

Counter input

X000

C 2

END

FNC 20

ADD

D 10 D 21D 0

C 2

Y006

Operation 5)

D 2

M1140

M8184

Slave 1 communication error

Operation 6), 7)

Operation 4)

Operation 1)

Operation 2)

Operation 3)

X001

K1Y014

K1M1128

FNC 12

MOV

K1Y010

K1M1064

K1X000

K1M1000

FX communication

N:N network 4

4-12

MEMO

FX communication

Parallel link 5

5-1

5. Parallel link

Data transfe r wi th FX2N, FX

2NC

, FX1N, FX, FX2C programmable cont roll ers can be per formed on a

1:1 basis for 100 auxiliary relays and 10 data registers. Data transfer with FX

, FX

programmable controller can be performed on a 1:1 basis for 50 auxiliar y relays and 10 data registers. For system configuration, refer to subsectio n 1.2.2.

5.1 Related Flags and Data Registers

Device Operation

M8070 Driven when the programmable controller is a master station in a parallel link. M8071 Driven when the programmable controller is a slave station in a parallel link. M8072 ON while the programmable controller is operating in a parallel link. M8073 ON when M8070/M8071 are incorrectly set during parallel link operations. M8162 High speed mode for parallel link, 2 data words read/write only. M8070 Parallel link watchdog time (Default: 500 ms).

FX communication

Parallel link 5

5-2

5.2 Mode and Link Device

5.2.1 Normal Mode (Special auxiliary relay M8162: OFF)

Note;

Parallel link is possible between PLC’ s in the same series, or in other series as long as they are in the group. However, parallel link between each different group cannot be achieved. Groups are sepa ra ted as follows.

FX2N, FX

2NC

, FX1N, FX, FX

FX1S, FX

Communication

devices

Master →→→→ Slave

M800 to M899 (100 points), D490 to D499 (10 points)

M400 to M449 (50 points), D230 to D239 (10 points)

Slave

→

→ →

→ Master

M900 to M999 (100 points), D500 to D509 (10 points)

M450 to M499 (50 points), D240 to D249 (10 points)

Communication time

70 (ms) + Scan time of master (ms) + Scan time of slave (ms)

Group No. Series

Group 1 FX

, FX

2NC

Group 2 FX

Group 3 FX

Group 4 FX

Group 5 FX, FX

M8000

M8071

D -D D -D

M -M M -M

D -D D -D

M -M M -M

M8000

Master

Automatic communication

Slave

M8070

✰✰ ✰✰

FX communication

Parallel link 5

5-3

5.2.2 High Speed Mode (Special auxiliary relay M8162: ON)

Note;

FX2N, FX

2NC

, FX1N, FX, FX

FX1S, FX

Communication

devices

Master →→→→ Slave

D490, D491 (2 points) D230, D231 (2 points)

Slave

→

→ →

→ Master

D500, D501 (2 points) D240, D241 (2 points)

Communication time

20 (ms) + Scan time of master (ms) + Scan time of slave (ms)

Group No. Series

Group 1 FX

, FX

2NC

Group 2 FX

Group 3 FX

Group 4 FX

Group 5 FX, FX

M8162

D ,D

M8000

M8070

M8162

M8000

M8071

Master

Automatic communication

Slave

FX communication

Parallel link 5

5-4

5.3 Example Program

5.3.1 Normal Mode

The ON/OFF status of the inputs X000 to X007 in the master station is output to Y000 to Y007 in the slave station (#). When the calculation result (D0+D2) in the master station is 100 or less, Y010 in the slave station is turned on ($). The ON/OFF status of M0 to M7 in the slave station is output to Y000 to Y007 in the master station ((). The value of D10 in the slave station is set to the timer (T0) in the master station ()).

5.3.2 High Speed Mode

When the calculation resul t (D0+ D2) i n the maste r stat ion i s 1 00 or l ess , Y010 in the sl a ve station is turned on (#). The value of D10 in the slave station is set t o the t ime r (T0) in the master stat io n ($).

Master station

M8000

M8070

M8000 M8000

X010

D500

END

①

②

③

④

Slave station

M8000

M8071

M8000

X010

END

M10

Y010

①

②

③

④

FNC 20

ADD

FNC 12

MOV

FNC 12

MOV

FNC 12

MOV

K2M800K2X000

D490D2D0

K2Y000K2M900

K2Y000K2M800

M10D490 K100

K2M900K2M0

D500D10

FNC 12

MOV

FNC 12

MOV

FNC 10

CMP

M8000

M8070

M8000

X010

D500

END

M8162

①

②

Master station

Slave station

M8000

M8071

M8000

END

M8162

M10

Y010

X010

①

②

D2D0 D490

D490 K100 M10

D10 D500

FNC 20

ADD

FNC 10

CMP

FNC 12

MOV

Note;

In the normal mode, “FNC 81 PRUN” instruction can be used for #. However, this instruction is only supported for FX

, FX1N, FX, FX2C, FX2N, FX

2NC

programmable controller.

FX communication

Communication format 6

6-1

6. Communication format (D8120)

This chapter explains setting the communication between no protocol communication (RS instruction) and computer link. For the RS instruction, refer to Section 9. For computer link, refer to Sections 7 and 8.

6.1 What Is Communication Format?

The communication f ormat decides the communicat ion setting (dat a length, parity, and baud rate, etc.) between computer link and no protocol communication (RS instruction). The communication format can be set using the special data register D8120* in a programmable controller. Set D8120 in accordance with external equipment used. After modifying the setting of the D 8120, make sure to tur n off the power of the programma ble controller, then turn it on again.

* In the FX

, FX

2NC

series, this setting can be performed using parameters.

6.2 Related Flags and Data Registers

6.2.1 Special Auxiliary Relays

( ) indicates the applicable application.

6.2.2 Special Data Registers

( ) indicates the applicable application.

Special auxiliary relays Description

M8121 Data transmission delayed (RS instruction) M8122 Data transmission flag (RS instruction) M8123 Finished receiving flag (RS instruction) M8124 Carrier detection flag (RS instruction) M8126 Global flag (computer link) M8127 On-demand handshake flag (computer link) M8128 On-demand error flag (computer link)

M8129

On-demand word/byte changeover (computer link) Time out evaluation flag (RS instruction)

M8161 8 bits/16 bits changeover flag (RS instruction)

Special data registers Description

D8120 Communication format (RS instruction, computer link) D8121 Station No. setting (computer link) D8122 Number of remaining data to be transmitted (RS instruction) D8123 Number of receive data (RS instruction) D8124 Data header <Initial value: STX> (RS instruction) D8125 Data terminator <Initial value: ETX> (RS instruction) D8127 On-demand head device register (computer link) D8128 On-demand data length register (computer link) D8129 Data network Time-out timer value (RS instruction, computer link)

FX communication

Communication format 6

6-2

6.3 Communication Format (D8120)

*1 Make sure to set to “0” when computer link used. *2 Make sure to set to “0” when no protocol commun ication used. *3 When using RS-485 (RS-422) inte rface, make sett i ng control li ne the same as th is . But control

line of communication is the same as when not using control line operation. This connection (RS-485) is supported in the FX

, FX1S, FX1N, FX2N, FX

2NC

series.

Bit

No.

Name

Description

0 (bit = OFF) 1 (bit = ON)

b0 Data length 7 bit 8 bit

b1 b2

Parity

(b2, b1) ( 0, 0) : None ( 0, 1) : Odd ( 1, 1) : Even

b3 Stop bit 1 bit 2 bit b4

b5 b6 b7

Baud

rate(bps)

(b7, b6, b5, b4) (b7, b6, b5, b4) ( 0, 0, 1, 1) : 300 ( 0, 1, 1, 1) : 4,800 ( 0, 1, 0, 0) : 600 ( 1, 0, 0, 0) : 9,600 ( 0, 1, 0, 1) : 1,200 ( 1, 0, 0, 1) : 19,200 ( 0, 1, 1, 0) : 2,400

Header None Effective (D8124) Default : STX (02H)

Terminator None Effective (D8125) Default : ETX (03H)

b10 b11 b12

Control

line

protocol

(b12, b11, b10) ( 0, 0, 0) : No use <RS-232C interface> ( 0, 0, 1) : Terminal mode <RS-232C interface> ( 0, 1, 0) : Interlink mode <RS-232C interface > (FX

V2.00 or

more)

( 0, 1, 1) : Normal mode 1 <RS-232C interface>,

<RS-485 (RS-422) interface>*3

( 1, 0, 1) : Normal mode 2 <RS-232C interface> (FX, FX

only)

Computer

link

(b12, b11, b10) ( 0, 0, 0) : RS-485 (RS-422) interface ( 0, 1, 0) : RS-232C interface

b13

Sum check Sum check code is not added Sum check code is added automatically

b14

Protocol No protocol Dedicated protocol

b15

Transmission

control

protocol

Protocol format 1 Protocol format 4

FX communication

Communication format 6

6-3

6.4 Example of setting program

When setting the contents shown on the left, perform programming as follows.

M8002

0000 1100 1000 1110

b15 b0

0 C 8 E

D8120 =

FNC 12

MOV

H0C8E D8120

Data length 7 bits Parity Even Stop bit 2 bits Baud rate 9600 bps Protocol No protocol Header No used Terminator No used Control line Normal mode 1

FX communication

Communication format 6

6-4

MEMO

FX communication

Computer link 7

7-1

7. Computer Link

This chapter explains the details and methods of specifying dedicated protocol used f or linking of the FX programmable controller and computer. The dedicated protocol is available in two types, format 1and f ormat 4 (the format names conform to the dedicated protoc ols used in t he comp uter link unit of the A series programmab le controller). In this chapter FX

-232-BD, FX1N-232-BD, FX0N-232ADP and FX-232ADP refer to 232ADP,

-485-BD, FX1N-485-BD, FX0N-485ADP and FX-485ADP refer to 485ADP, FX-485PC-IF refer to 485PC-IF. When interface of programmable controller using RS-232C, please after read 232ADP instead of 485ADP.

7.1 Data Fl ow by Link

Shown below are drawings of data flow for reading, writing, and status control of the programmable controller.

1 ) The computer reads data from programmable cont roller.

2 ) The computer sends data to programmable controller.

*OS (operating system) is the software for operating (or using) effectively the resources such as

the CPU, memory, terminal, file and network.

OS*

RS-232C

(2)Command (9)Various data (12)Response

Device memory information (Read) Programmable controller CPU information (Read)

(1)

(10)

(11)

Computer

Request

Data Comn. Prog.

485ADP

(4) (7)

(14)

ProgramOS*

Device memory,etc.

Programmable controller

Data(6) (5)Read

RS-485

(13)

485PC-IF

Signal

converting

interface

(3) (8)

(3)

(4)

(7)

(6)

485PC-IF

RS-485

485ADP

OS*

(1)

Computer

Request

Data Comn. Prog.

Program

OS*

Device memory,etc.

Programmable controller

(5)

Write

(2)

Command,

data,etc.

(8)

Response

RS-232C

Device memory information (Write) Programmable controller CPU information (Write)

FX communication

Computer link 7

7-2

3 ) Programmable controller sends data to the comput er.

*OS (operating system) is the software for operating (or using) effectively the resources such as

the CPU, memory, terminal, file and network.

(6)

Data

(5)

(4)

Data

RS-232C

485PC-IF

RS-485

485ADP

On-demand data

(2)

Read

Data

(3)

(1)

Send request+ data write

Program

OS*

Device memory,etc.

Programmable controller

(7)

Write

OS*

Computer

Data Comn. Prog.

FX communication

Computer link 7

7-3

7.2 Information Needed Before Programming

7.2.1 Programmable Controller Operation

The operation and the scan time of programmable controller using computer link is as follows. While the programmable controller is running, access requests to the programmable controller from the computer are processed on every END processing. The processing of Send or Receive data is performed using interrupts. Therefore, during the processing of Send or Receive, the scan time is extended; typically by about 10%. The scan time can be monitored using the special data registers D8010 to D8012 of the programmable controller.

Note:

- These are in units of 0.1 ms

7.2.2 Computer Notes

1 ) Conditions under which the transmission sequence is initialized.

The transmission sequence of the programmable controller is initialized during the following conditions.

- When the power is turned on

- When data communication is completed normally

- When control code EOT or CL is received

- When a NAK control code is received

- After the time-out check time has elapsed (see section 7.4.4)

2 ) Occurrence of a framing error at the computer side

When a commercial RS-485 interface is used at the computer, if nothing is transmitted from the programmable controller to the computer at the interface, a framing error may occur at the computer. Accordingly, read and skip the data at the computer until any one of STX, ACK, and NAK is transmitted from the programmable controller.

3 ) NAK response from programmable controll er

NAK response from the programmable controller to the computer is done when an error is detected.

4 ) Command transmission from computer

When sending a command from the computer to the programmable controller using dedicated protocol, on ly send the comma nd after a gap of app roximately two PLC scans from the time the data communications required by the previous command was elapsed.

Caution:

When using RS-485 wiri ng (one pair, see section 2.3.3) remember to take account of/or

ignore the “echo” of the commands sent from the computer.

FX communication

Computer link 7

7-4

7.3 How to Read a Control Protocol Diagram

1 ) When the computer reads data from the programmable controller

(computer

←

programmabl e controller)

a ) Areas A and C indicate transmission from the computer to the programmable controller. b ) Area B denotes transmission from the programmab le controller to the computer. c ) The computer program is created so that the data is transmitted in the order read from left

to right, and the protocol determines that the data is sent in the sequence A, B, C.

(Example: In area A, ENQ is transmitted followed by all other data, starting to the r ight, after the ENQ.)

2 ) When writing data from the computer into the programmable controller

(computer

→

programmable controller)

a ) Areas A indicates transmission from the computer to the programmable controller. b ) Area B denotes transmission from the programmab le controller to the computer. c ) The computer program is created so that the data is transmitted in the order read from left

to right, and the protocol determines that the data is sent in the sequence A, B.

(Example: In area A, ENQ is transmitted followed by all other data, starting to the r ight, after the ENQ.)

Computer Programmable

controller

Data

S T X

Data

A C K

E N Q

Data

Computer Programmable

controller

A C K

E N Q

FX communication

Computer link 7

7-5

7.4 Basic Formats of Dedicated Protocol

There are two formats for the dedicated protocol; which may be selected by setting special data register D8120(see chapter 6). The difference between these two formats is whether CR

LF is added to each block or not. The protocols are format 1 and f ormat 4. (The f ormat names conform to the computer link unit for the A series programmable controller.)

Note:

*1 Whether or not to add sum check code can be selected using the communication format

special data register D8120.

*2 Whether or not to add terminating CR

LF codes is determined by the protocol selected.

(

)

Control code

Station No.

PLC No.

Command

Message wait

Character

Sum check code *1

Control code CR/LF *2

)

(

Basic format of transmitted data.

FX communication

Computer link 7

7-6

7.4.1 Control Protocol Format 1

Description Control protocol

To read data from the PLC to the computer

To write data from the computer to the

PLC

Remarks

1 ) Sum check code is used when the sum c heck flag i s set “Yes” (“b13=1” in s pecial data r egist er

D8120), and not used when set to “No” (“b13=0”).

2 ) When the sum check flag is set to “Yes”, the sum check is made on the characters in the

asterisked area.

3 ) In the diagram, the contents of character area A, character area B, and character area C

depend on the individual system, but do not differ depending on the format of control protocol. For details of each character area, see the link contents.

Computer Programmable

controller

E N Q

Station

No.

PLC No.

Command

Message

wait time

Character

area A

Sum

check

code

Station

No.

S T X

PLC No.

Character

area B

E T X

Sum

check

code

Station

No.

A C K

PLC No.

Station

No.

N A K

PLC No.

N A K

Station

No.

PLC No.

Error

code

Transmission sequence

Computer Programmable

controller

E N Q

Station

No.

PLC No.

Command

Message

wait time

Character

area C

Sum check

code

Station

No.

A C K

PLC No.

N A K

Station

No.

PLC No.

Error code

Transmission sequence

FX communication

Computer link 7

7-7

7.4.2 Control Protocol Format 4

Description Control protocol

To read data from the

PLC

to the computer

To write data from the computer to the PLC

Remarks

1 ) Sum check code is used when the sum check flag is set “Yes” (“b13=1” in special data register

D8120), and not used when set to “No” (“b13=0”).

2 ) When the sum check flag is set to “Yes”, the sum check is made on the characters in the

asterisked area.

3 ) In the diagram, the contents of character area A, character area B, and character area C

depend on the individual system, but do not differ depending on the format of control protocol. For details of each character area, see the link contents.

Computer Programmable

controller

E N Q

Station

No.

PLC No.

Command

Message

wait time

Character

area A

Sum check

code

Station

No.

S T X

PLC No.

Character

area B

E T X

Sum check

code

Station

No.

A C K

PLC No.

Station

No.

N A K

PLC No.

N A K

Station

No.

PLC No.

Error code

Transmission sequence

L F

C R

L F

C R

L F

C R

L F

C R

L F

C R

Computer Programmable

controller

E N Q

Station

No.

PLC No.

Command

Message

wait time

Character

area C

Sum check

code

Station

No.

A C K

PLC No.

N A K

Station

No.

PLC No.

Error

code

Transmission sequence

L F

C R

L F

C R

L F

C R

FX communication

Computer link 7

7-8

7.4.3 Control Protocol Parts Explained

This is to explain the content of data set in each control procedure. 1 ) Control codes

The control codes are listed below.

a ) The programmable controller initializes the transmission sequence when receiving any

one of ENQ, ACK, NAK, and starts.

b ) When EOT, or CL code is received as follows, the programmable controller initializes the

transmission sequence. At this time, no response is made fro m the programmable controller.

Signal

Code

(Hexadecimal)

Description Signal

Code

(Hexadecimal)

Description

STX 02H Start of Text LF 0AH Line Feed ETX 03H End of Text CL 0CH Clear EOT 04H End of Transmission CR 0DH Carriage Return

ENQ 05H Enquiry NAK 15H Not Acknowledge

ACK 06H Acknowledge

Format 1 Format 4

Computer Programmable

controller

E O T

Computer Programmable

controller

E O T

FX communication

Computer link 7

7-9

2 ) Station number

The station number is the number provided at the programmable controller in order to determine which programmable controller the computer accesses. In the FX series programmab le controll er, the station number is set by the special data register D8121( special D8121 hereinafter). The setting range is 00H to 0FH. In the case of FX

series turn on M8120 when using the special D8121. For the setting method of an A series programmable controller, see the A series manual.

The following ins tructions can be used to set the stat ion number of sta tion 0 in the abo ve system.

↑

485ADP

Station No.15

Computer

FX series

485PC-IF

↑

485ADP

Station No.0

↑

485ADP

Station No.1

↑

485ADP

Station No.2

M8002

FNC 12

MOV

D8121

Notes

1 )When setting station numbers, don't set the same number at more than 1 station.

Otherwise, transmission data may become confused and communication irregular.

2 ) Station numbers need not be set in numerical order, but are free to be set within the

specified range(00H to 0FH). For example, setting in a random order or skipping numbers is acceptable.

3 )PLC number

The PLC number is the number identifyin g the programmable controller C PU on the A series MELSECNET(II) or MELSECN E T /B. Accordingly, the PLC number for an FX series programmable controller is FF

, and is represented as two ASCII characters; i.e. ”FF”. When using the on-deman d function the PLC number is automatically converted to FF

by the programmable controller. For the PLC number of programmable controller CPU on the MELSECNET(II), MELSECNET/B see the computer link manual for A series programmable controllers.

4 )Command

Used to specify the operation r equired, e.g. read, write, etc. Commands are de fined using two ASCII characters. For a description of the available commands, see section 7.7.1.

FX communication

Computer link 7

7-10

5 ) Message wait

This is a delay time required by some computers to switch between send and receive states. The message wait time determ ines the minimum de lay before the programmable controller sends data after receiving a message from the computer. Set the wait time according to the computer specifications. The message wait time may be set between 0 to 150 ms in 10 ms increments. The value is set using a single ASCII character (“0 to “F”) representing 0

to FH (0 to 15). When using the 485PC-IF in a 1:n system always set the message to be 70 ms or longer (7 or more). If scan time of progr ammable controller is 70 ms or more on the network, message wait time needs to be set at maximum scan time o r more.

Example: Setting the message wait time

6 ) Sum check code

The sum check code i s us ed to verify that the data in a mes sage has not been corrupted. I t i s calculated by adding (summing) the hexadecimal values of the ASCII character codes in the sum check area of a m essage. The lower two digits (in hexadecimal) of the su mmed resu lt (the sum check code) are then represented as two ASCII characters at the end of the message. (Note: The sum of the decimal ASCII character codes, converted to hexadecimal, will give the same result). Special data register D8120 (comm unic ati on format) b13, sets whether or not to add the sum check code to the message.

• When “b13=1”, the sum check code is automatically added to messages when transmitting, and a new sum check value is calculated from the Receive data and compared with the received sum check value, thereby checking the Receive message.

• When “b13=0”, the sum check code is not added, and the Receive data is not checked. An example showing how to calculate the sum check code is given below .

Example: When transmitting s tation numbe r 0, PL C number F F, comman d BR (device memor y batch read), message wait time 30 ms, and data ABCD in format 1, the sum che ck code is calculated as foll ows.

Computer Programmable

controller

Transmission starts more than 100 ms later.

Wait time must be longer than two-scan time.

"A"

Message wait (100 ms)

05H

30H

E N Q

30ms (Message wait time)

30H+30H+46H+46H+42H+52H+33H+41H+42H

+43H+44H=2BDH

···

Computer

Programmable controller

Station

No.

0 0

PLC

No.

F F

Sum

check

code

B D

30H46H46H 42H 52H 33H 41H42H43H44H42H44H

Message

wait time

Character area

A B C D

02H30H

E N Q

Station

No.

0 0

PLC

No.

F F

30H46H46H

Command

B R

FX communication

Computer link 7

7-11

7.4.4 Time-out Check Time

The time out check time refers to the duration after termination of receive (final character received) of a failed transmission from the computer to the programmable controller, until the send sequence is initialized. This check time is speci fied as follows depending on the model and version of the prog rammable controller.

To set the time-out check time as 60 ms:

It must be noted that the time-out check time is not updated until the next character is received, and hence must be set to at least more than the time necessary to receive one character at the baud rate (transmission speed) in use. When 1 character = 12 bits, the minimum setting of timeout check time is as follows.

PC series Setting range

, FX1S, FX

1 to 255 (10 to 2,550 ms) ; however, a setting of “0” gives 100 ms.

FX, FX

, FX2N, FX

2NC

1 to 3,276 (10 to 32,760 ms) ; however, setting of “0” gives 100 ms.

Baud rate (bps) Time to receive one character (ms) Time-out check time (set value)

300 40 50ms (5)

600 20 30ms (3) 1200 10 20ms (2) 2400 5 10ms (1) 4800 2.5 10ms (1) 9600 1.25 10ms (1 )

19200 0.625 10ms (1)

M8002

FNC 12

MOV

D8129

Other function information:

• In the case of FX

series, turn on M8120 when using the special D8129.

FX communication

Computer link 7

7-12

7.5 Communication Timing Chart

7.5.1 Reading Data from Programmable controller

7.5.2 Writing Data to Programmable Controller

E N Q

Computer

Interface

Programmable

controller

A C K

S T X

Wait(TW) T3 T4 T5

More than two-scan delay is needed.

Read process

This time becomes 0 when the message wait time is not set or when the wait time is less than the processing time needed by the programmable controller.

T0 T1 T2

Programmable

controller program

END Step 0 END Step 0 END Step 0 END

If the wait time has expired the response is sent at completion of the END process, otherwise the wait time is checked again during the next END process.

Writing data

E N Q

Computer

Interface

Programmable

controller

Wait(TW) T3

Write process

This time becomes 0 when the message wait time is not set or when the wait time is less than the processing time needed by the programmable controller.

T0 T1 T2

Programmable

controller program

END Step 0 END Step 0 END Step 0 END

If the wait time has expired the response is sent at completion of the END process, otherwise the wait time is checked again during the next END process.

FX communication

Computer link 7

7-13

7.5.3 Communication Time

This is to explain the method of calculating the approximate time until all communication is over. For the locations of T0 to T4, see the previous page.

1 ) When reading data from the programmable controlle r to the computer

Communication time = T0 + (T1 + T2 or TW, whichever is longer) + T3 + T4 + T5

2 ) When writing data from the computer to the programmable controller

Communication time = T0 + (T1 + T2 or TW, whichever is longer) + T3

T0, T3, T5 =1/baud rate × number of bits in 1 character (1 + 7(8) + 0(1) + 1(2))

number of characters

T1 =max. 1 scan time (during RUN, message processing is done at END processing, a

maximum delay of 1 scan could occur depending on message timing; during STOP,

T1 is 1 ms) T2 =END process time of programmab le controller during data communication T4 =A delay of at least 2 scans is required. However, using one-pair wiring on the 1:N

system configuration, this time need to set “Time-out timer value (D8129) + 1 scan

time” or more. TW = set time when message wait is set.

Stop bit (1 or 2)

Data length (7 or 8)

Parity bit (0 or 1)

Start bit

T0, T3 =1/baud rate × number of bits in 1 character (1 + 7(8) + 0(1) + 1(2))

number of characters

T1 =max. 1 scan time (during RUN, message processing is done at END processing, a

maximum delay of 1 scan could occur depending on message timing; during STOP,

T1 is 1 ms) T2 =END process time of programmab le controller during data communication TW = set time when message wait is set.

Stop bit (1 or 2)

Data length (7 or 8)

Parity bit (0 or 1)

Start bit

FX communication

Computer link 7

7-14

7.6 Character Area Data Transmission

The data shown in the f oll owing examples are samples of the data used in character area B when reading or character area C when writing data. (see section 7.4.1 and 7.4. 2)

7.6.1 Bit Device Memory

Bit device memory is handled in 1 bit units (1 point) or in word unit (16 points). 1 ) Bit units (units of 1 point)

When handling bit device memor y in bit units, the specified number of devices, in an increasing order from the s pecified head device, are represented sequen tially from the left, as “1”(31H) when ON, and as “0”(30H) when OFF.

Example: When transmitting the on/off status of five points from M10

2 ) Word units (units of 16 points)

When handling bit device memory in word units, each word (16 bits, highest bit being first) is expressed as 4 hexadecimal digits (each of 4 bits) starting with the higher digit. Each digit being represented by the appropriate ASCII character.

Example: When transmitting the on/off status of 32 points from M16

4DH 30H31H30H30H 35H30H

Head device

M 0 0 1 0

No.of

device

points

0 5

Data

1 0 1 0 1

31H 31H30H31H30H

Indicating M14 is ON

Indicating M12 is ON

Indicating M13 is OFF

Indicating M10 is ON

Indicating M11 is OFF

41H 32H31H42H 33H 44H43H34H

The number of devices is "02" because word units are used.

1010000000000 1111111111111 00000 0

B15 B11B12B13B14 B9B10 B8 B5B6B7 B4 B1B2B3 B15 B11B12B13B14 B9B10 B8 B5B6B7 B4 B1B2B3B0 B0

M17M18M19M20M21M22M23M24M25M26M27M28M29M

M35M

M38M

M39M40M41M42M43M44M45M46M47M

M33M34M

AB DC4321

1:Represents ON 0:Represents OFF

4DH 36H31H30H30H 32H30H

Head device

M 0 0 16

No.of

device

points

0 2

Data

A B 1 2

Data

3 4 C D

Lowest bit of 2nd word

Head device: Lowest bit of 1st word

FX communication

Computer link 7

7-15

7.6.2 Word Device Memory

When handling word device memory, each word is expressed as 4 hexadecimal digits (each of 4 bits) starting w ith the higher digit. Each digit being repres ented by the appropriate ASC II character.

Example 1) When showing the contents of data registers D350, D351

Example 2) When showing the contents of C200* (32-bit counter)

* The device code of C200 is CN200.

10 10000000000 111111111111 0000

56 F071BA

11 1

Contents of D350 is 56ABH (22187 in decimal).

Contents of D351 is 170FH (5903 in decimal).

B15 B11B12B13B14 B9B10 B8 B5B6B7 B4 B1B2B3 B15 B11B12B13B14 B9B10 B8 B5B6B7 B4 B1B2B3B0 B0

35H 42H41H36H 31H 46H30H37H

44H 30H35H33H30H 32H30H

Head device

D 0 3 5 0

No.of

device

points

0 2

Data

5 6 A B

Data

1 7 0 F

12 876543

The content of the C200 shows 12345678H (305419896 in decimal notation).

31H 34H33H32H 35H 38H37H36H

44H 30H30H32H4EH 31H30H

Head device

C N 2 0 0

No.of device points

0 1

Data

1 2 3 4

Data

5 6 7 8

B15 B11B12B13B14 B9B10 B8 B5B6B7 B4 B1B2B3 B15 B11B12B13B14 B9B10 B8 B5B6B7 B4 B1B2B3B0 B0

101

11001

10001

FX communication

Computer link 7

7-16

7.7 Commands and Devi ce Ranges

7.7.1 Commands

* Computer except high speed (32-bit) counters C200 to C255.

Command

Description

Maximum No. of units

per communication

Symbol

ASCII

code

FX0N,

FX, FX2C,

, FX2N,

2NC

Device memory

Batch

read

Bit

unit

BR 42H, 52H

Reads a group of bit devices (X, Y, M, S, T, C), result is in units of 1 device.

54 points 256 points

Word

unit

WR 57H, 52H

Reads a group of bit devices (X, Y, M, S), result is in units of 16 devices.

13 words,

208 points

32 words,

512 points

Reads a group of word devices (D, T, C), result is in units of 1 device.

13 points 64 points

Batch

write

Bit

unit

BW 42H, 57H

Writes a group of bit devices (X , Y, M, S, T, C), data is in units of 1 device.

46 points 160 points

Word

unit

WW 57H, 57H

Writes a group of bit devices (X , Y, M, S), data is in units of 16 devices.

10 words,

160 points

10 words

160 points

Writes a group of word devices (D, T, C), data is in units of 1 device.

11 points 64 points

Test

(select

write)

Bit

unit

BT 42H, 54H

Set/reset individual bit devices (X, Y, M, S, T, C) selectively in units of 1 device.

10 points 20 points

Word

unit

WT 57H, 54H

Set/reset bit devices (X, Y, M, S) selectively in units of 16 devices.

6 words,

96 points

10 words,

160 points

Write word devices (D, T, C*) selective ly in units of 1 device.

6 points 10 points

Remote run RR 52H, 52H

Remote run/stop request to programmable controller.



Remote stop RS 52H, 53H

PC type read PC 50H, 43H PC type name(code) is read.

Global GW 47H, 57H

Set/reset the global flag (M8126 for FX series) to all connected programmable controllers.

1 point 1 point

On-demand



Send request from programmable controller. Possible, however, only in 1:1 system configuration.

Maximum

13 words

Maximum

64 words

Loopback test TT 54H, 54H

Characters received from the computer are directly sent back to the computer.

characters

254

characters

FX communication

Computer link 7

7-17

7.7.2 Device specification ranges

The following is the device and device number range that can be used in the access of device memory. Each device is composed of five characters. Device (1 character, 2 characters with timer and counter) + device number (4 characters, 2 characters with timer and counter) = 5 characters.

1 ) Bit devices

In FX series, the timer coil (TC) and counter coil (CC) are not supported.

2 ) Word devices

* Only CN000 to CN199 can be used.

(C200 to C255 of 32 bit counter or high speed counter cannot be used.)

Device

Device specification characters

Decimal/octal

expression

Usable

command

FX, FX

2NC

BR, BW,

WR,

WW,

Inputs (X)

X0000

∼

X0177

X0000

∼

X0017

X0000

∼

X0337

X0000

∼

X0177

X0000

∼

X0267

Octal

Outputs (Y)

Y0000

∼

Y0177

Y0000

∼

Y0015

Y0000

∼

Y0337

Y0000

∼

Y0177

Y0000

∼

Y0267

Auxiliary relays (M)

M0000

∼

M0511 M0000∼M1535

M0000

∼

M3071

Decimal

States (S)

S0000∼S0127 S0000∼S0999

Special auxiliary relays (M)

M8000

∼

M8254 M8000∼M8255

Timer contacts (T)

TS000

∼

TS063 TS000∼TS255

Counter contacts (C)

CS000

∼

CS031

CS235

∼

CS254

CS000

∼

CS255

Device

Device specif ication characters

Decimal/

octal

expression

Usable

command

FX, FX

FX1N, FX

2NC

BR,

BW,

WR, WW

Timer current value (T)

TN000

∼

TN063 TN000∼TN255

Decimal

Counter current value(C)

CN000

∼

CN031

CN235

∼

CN254

CN000

∼

CN255

Data registers (D)

D0000

∼

D0255 D0000∼D0999 D0000∼D7999

File registers (D)

D1000∼D2499



D1000∼D2999



RAM file registers (D)



D6000∼D7999



Special data registers(D)

D8000∼D8255 D8000∼D8255

Notes

1 ) When using bit devices specified in word units (WR, WW, WT), the number of the

head device must be a multiple of 8 (or if an octal device end in 0) e.g. X30, M24.

2 ) The special auxiliary relays (M8000 to M8255) and special data registers (D8000

to D8255) can be read only, write only, and received for system use. If an attempt is made to write outside the write enable range, an error may occur in the programmable controller. Accordingly, for details of special auxiliary relays and special data registers, see the programmable controller manual.

FX communication

Computer link 7

7-18

7.8 Example Computer Program for Loopback Test

This is an example of a BASIC program for communication of the computer link using a computer, programmable controller 485PC-IF, and 485ADP. (not used outside Japan.) Pleas see loopback test command see section 8.11.

1 ) Setting of transmission specification

2 ) Program example

Personal

computer

485

PC-IF

FX series programmable controller

4 8

5 A D P

Item Description

Communication method

Half-duplex communication method

Synchronizing method

Start-stop synchronization method

Baud rate 9600 bps

Data format

Start bit 1 bi t Data length 7 bit Parity bit None

Stop bit 1 bit Sum check Sum check is used Station No. Station No.0 Exclusive protocol

format

Format 1

According to the above transmission specification, the transmission specification and transmission procedure of the programmable controller are set as follows.

D8120 = H6080 D8121 = H0000 D8129 = K0

For setting and details, see chapter 6, and section 7.4.

10 T0 = 3000 : ′ Reception wait counter (adjusted depending on computer speed) 20 STCNT = 14 : ′ Normal data length 30 NACNT = 7 : ′ Data length of error code (NAK statement) 40 ERFLG = 0 50 ENQ$ = CHR$(5) 60 STX$ = CHR$(2) 70 ETX$ = CHR$(3) 80 NAK$ = CHR$(&H15) 90 *DATASEND : ′ Data transmission 100 CLOSE #1 110 OPEN″COM1″:″AS#1

″

120 SENDDATA$ = ″00FFTT204ABCD34

″

: ′ Transmission data 130 PRINT #1, ENQ$; SENDDATA$; 140 *REC0: ′ Reception of first character 150 RVCNT = 1 160 GOSUB *RECWAIT 170 IF ERFLG = 99 THEN GOT O ERRORFIN1 180 BUF$ = RCV$

0 0 F F T T 2 A B C D 3 4

Station No.

PLC No.

Command

Data wait

Character

0 4

Number of characters

Sum check code

Transmission data

FX communication

Computer link 7

7-19

190 HED$ = LEFT$(BUF$.1) 200 IF HED$ = STX$ OR HED$ = NAK$ THEN GOTO *REC1 ELSE GOTO *REC0 210 *REC1 : ′ Reception of remaining data 220 IF HED$ = STX$ THEN RVCNT = STCNT-1 230 IF HED$ = NAK$ THEN RVCNT = NACNT-1 240 GOSUB *RECWAIT 250 IF ERFLG = 99 THEN GOTO *ERRORFIN1 260 BUF$ = BUF$ + R C V$ 270 *PRINTRDATA : ′ Display of received data 280 PRINT ″Received data

″

290 PRINT ″HEX ASCII

″

300 FOR I=1 TO LEN(BUF$) 310 PRT1$ = MID$(BUF$,I,1) 320 PRT1$ = HEX$(ASC(PRT1$)) 330 IF PRT2$ = ″2″ THEN PRINT ″ ″;″02″;″STX″ :GOTO 370 340 IF PRT2$ = ″3″ THEN PRINT ″ ″;″03″;″ETX″ :GOTO 370 350 IF PRT2$ = ″15″ THEN PRINT ″ ″;″15″;″NAK″ :GOTO 370 360 PRINT ″ ″;PRT2$;″ ″CHR$(&H22);PRT1$;CHR$(&H22) 370 NEXT I 380 IF HED$ = NAK$ THEN GOTO *ERROROFIN2 390 *DATACHECK : ′ Check of receiv ed da ta 400 DDATA$ = STX$ + ″00FF04ABCD″ + ETX$ + ″5D″ : ′ Normal data 410 FOR J=1 TO LEN(BUF$) 420 RDATA$ = MID$(BUF$,J,1) 430 ODATA$ = MID$(DDTA$,J,1) 440 IF RDATA$ <> ODATA$ THEN GOTO *ERRORFIN3 450 NEXT J 460 PRINT ″Received data is normal

″

470 PRINT ″Loopback test complete ″:GOTO *FIN 480 *ERRORFIN1 490 PRINT ″Data is not received at all or data content is insufficient.

″

500 GOTO *FIN 510 *ERRORFIN2 520 ERRORCODE$ = MID$(BUF$,6,2) 530 PRINT ″Error code″ ;ERRORCODE$; ″H is received.

″

540 GOTO *FIN 550 *ERRORFIN3 560 PRINT ″Received data is abnormal.(″;J;″-th character)

″

570 *FIN 580 CLOSE #1 590 END 600 *RECWAIT : ′ Wait for receive 610 FOR I=1 TO T0 620 RCV$ =

″″

630 IF LOC(1) => RVCNT THEN GOTO *BUFIN 640 NEXT 650 IF RCV$ = ″″ THEN ERFLG=99 660 RETURN 670 *BUFIN : ′ Reading of received data 680 RCV$ = INPUT$(RVCNT,#1) 690 RETURN

FX communication

Computer link 7

7-20

3 ) Operation

a ) Start the computer program. b ) Send four characters “ABCD” from the computer to the FX programmable controller. c ) The FX programmable controller returns the four characters “ABCD” back to the

computer.

d ) The computer compares the data received from the programmable controller and the

original sent data, and displays a result message.

4 ) List of result messages

Message Remedy

Received data is normal. Data sending and receiving is normal. Data is not received at all or data content is

insufficient.

Check again the writing, station No., transmission

specification, and transmission protocol. Error code 00H is received. Refer to error code list in chapter 12. Received character is abnormal.

(0-th character)

Check for faulty writing, observing writing cautions.

FX communication

Commands 8

8-1

8. Commands

This chapter describes the str ucture and gives examples for each command of the dedicated protocol. See also Chapter 7 “Communication using Dedicated Protocols” .

The reference pages for command are given below.

Command Description Section

BR Bit devices read in units of 1 point. 8.1 WR Bit devices read in units of 16 points, or word devices read in units of 1 point. 8.2 BW Bit devices written in units of 1 point. 8.3

WW Bit devices written in units of 16 points, or word devices written in units of 1 point. 8.4

BT Bit devices specified in units of 1 point, and set/reset (forced on/off). 8.5

Bit devices specified in units of 16 p oints, and set/reset ( forced on/off), or word devices specified in units of 1 point, and data written.

8.6

RR Programmable controller is started (RUN) by remote control. 8.7

RS Programmable controller is stopped (STOP) by remote control. 8.7

PC Programmable controller type name code is read. 8.8 GW Global signal is turned on/off on all linked programmable controllers. 8.9



On-demand function (Send request is issued from the Programmable controller. There is no command).

8.10

TT Characters received from the computer are directly returned to the computer. 8.11

FX communication

Commands 8

8-2

8.1 Batch Read of Bit Device (BR command)

1 ) Command specification

Protocol format 1 is shown.

2 ) Command example

To read five points of data from X040 to X044 at station No.5 (with message wait time set to 100 ms). (Assuming that X040 and X043 are OFF and X41, X42 and X44 are ON)

Computer Programmable

controller

E N Q

Station

No.

PLC No.

B R

Message

wait time

Sum check

code

Station

No.

S T X

PLC No.

Data of

the

specified

devices

E T X

Sum check

code

Station

No.

A C K

PLC No.

Character area B

Batch read command (bits)

Head device

(5 characters)

Number of

devices

(2 characters,

hexadecimal)

Specifies the range of devices to be read.

"0" (30H) indicates OFF. "1" (31H) indicates ON.

Character area A

Notes

• Specify the range and number of devices so as to satisfy the foll owing conditions.

-1

≤

number of device s ≤ 256(54 for FX0N)(256 points are specified by 00H)

- Head device No. + number of devices -1

≤

max. device No.

• The station number, PC (PLC) number, number of devices, and sum check code are expressed in hexadecimal.

Computer Programmable

controller

E N Q

The sum check is calculated over this range

35H30H

0 5

46H46H

F F

52H42H

B R

41HA58H 30H34H30H30H 35H30H

X 0 0 4 0

0 5

37H34H

4 7

05H

S T X

35H30H

0 5

46H46H

F F

02H

0 1 1 0 1

30H 31H30H31H31H

E T X

35H30H

0 5

03H

A C K

35H30H

0 5

46H46H

F F

06H

Indicating X044 is ON Indicating X042 is ON

Indicating X043 is OFF

Indicating X040 is OFF

Indicating X041 is ON

Notes

• Message wait time can be specified from 0 to 150 ms in 10 ms increments, expressed by 0H to FH (in hexadecima l) . Therefore, 100 ms is expressed as “A”.

FX communication

Commands 8

8-3

8.2 Batch Read of Word Device (WR command)

1 ) Command specification

Protocol format 1 is shown.

2 ) Command examples

a ) Exa m p le 1

To read 32 points of data from X040 to X077 at station No . 5 (with message w ait time set to 100 ms).

Computer Programmable

controller

E N Q

Station

No.

PLC No.

W R

Message

wait time

Sum check

code

Station

No.

S T X

PLC No.

Data of

the

specified

devices

E T X

Sum check

code

Station

No.

A C K

PLC No.

Character area B

Batch read command (words)

Head device

(5 characters)

Number of

devices

(2 characters, hexadecimal)

Specifies the range of devices to be read.

One word device requires four hexadecimal digits. Therefore,one word is expressed using four characters.

Character area A

Notes

• Specify the range and number of devices (16 bit words) so as to satisfy the following conditions.

-1

≤

number of devi ces ≤ 64 (32 words in the case of bit devices) (13 words for FX0N)

- Head device No. + number of devices (number of devices

16 in the case of bit

devices) -1

≤

max. device No.

- When reading 32-bit devices (C200 to C255), the returned data is a double word.

Hence, the maximum number of devices is 32.

• The station number, PC (PLC) number, number of devices, and sum check code are expressed in hexadecimal.

Computer Programmable

controller

E N Q

The sum check is calculated over this range

35H30H

0 5

46H46H

F F

52H57H

W R

30H058H 30H34H30H30H 32H30H

X 0 0 4 0 0 2

38H34H

4 8

05H

S T X

35H30H

0 5

46H46H

F F

02H

E T X

38H30H

0 8

03H

A C K

35H30H

0 5

46H46H

F F

06H

31H 34H33H32H 41H 44H43H42H

0000101010001 1111100101010 00111 0

X 0 6 0

12 DCBA43

1 2 3 4 A B C D

X 0 6 1

X 0 6 2

0 6 3

0 6 7

X 0 7 0

X 0 7 1

0 7 2

0 7 7

X 0 4 0

X 0 4 1

0 4 2

X 0 4 3

0 4 7

0 5 0

0 5 1

0 5 2

0 5 7

Notes

• Command WR uses word units. When reading 32 points, the number of devices is specified by “02” (16 points (bits) per one word unit).

FX communication

Commands 8

8-4

b ) Exa m p le 2

To read the present value of two points , T123 and T124, at station No.5.

Computer Programmable

controller

E N Q

The sum check is calculated over this range

35H30H

0 5

46H46H

F F

52H57H

W R

30H054H 33H32H31H4EH 32H30H

T N 1 2 3 0 2

34H36H

6 4

05H

S T X

35H30H

0 5

46H46H

F F

02H

E T X

33H42H

B 3

03H

A C K

35H30H

0 5

46H46H

F F

06H

37H 39H43H42H 31H 34H33H32H

7 B C 9 1 2 3 4

Present value of T123: 7BC9H(hexadecimal): indicates 31689 in decimal. Present value of T124: 1234H(hexadecimal): indicates 4660 in decimal.

FX communication

Commands 8

8-5

8.3 Batch Write of Bit Device (BW command)

1 ) Command specification

Protocol format 1 is shown

2 ) Command example

To write data into five points from M903 to M907 at station No.0 (with message wait time set to 0 ms).

E N Q

Station

No.

PLC No.

B W

Message

wait time

Sum check

code

Station

No.

A C K

PLC No.

Data of

the

specified

devices

Head device

(5 characters)

Number of

devices

(2 characters,

hexadecimal)

Batch write command (bits)

Character area A

Computer Programmable

controller

Specifies the range of devices to be written.

"0" (30H) indicates OFF. "1" (31H) indicates ON.

Notes

• Specify the range and number of devices so as to satisfy the foll owing conditions.

-1

≤

number of device s ≤ 160

- Head device No. + number of devices -1

≤

max. device No.

• The station number, PC (PLC) number, number of devices, and sum check code are expressed in hexadecimal.

Computer Programmable

contoroller

E N Q

The sum check is calculated over this range

30H30H

0 0

46H46H

F F

57H42H

B W

30H04DH 33H30H39H30H 35H30H

M 0 9 0 3 0 5

36H

32H

2 6

05H

A C K

30H30H

0 0

46H46H

F F

06H

0 1 1 0 1

30H 31H30H31H31H

Specifies to turn OFF M903 Specifies to turn ON M905

Specifies to turn ON M904

Specifies to turn ON M907

Specifies to turn OFF M906

FX communication

Commands 8

8-6

8.4 Batch Write of Word Device (WW command)

1 ) Command specification

Protocol format 1 is shown

2 ) Specification examples

a ) Exa m p le 1

To write to 32 points from M640 to M671 at station No.0 (with message wait time set to 0 ms).

Computer Programmable

controller

E N Q

Station

No.

PLC No.

B R

Message

wait time

Sum check

code

Station

No.

A C K

PLC No.

Data of

the

specified

devices

Batch write Command (words)

Head device

(5 characters)

Number of

devices

(2 characters, hexadecimal)

Specifies the range of devices to be read.

Character area C

One word device requires four hexadecimal digits. Therefore,one word is expressed using four characters.

Notes

• Specify the range and number of devices (16 bit words) so as to satisfy the following conditions.

-1

≤

number of device s ≤ 64 (10 words in the case of bit devices)

- Head device No. + number of devices (number of devices

16 in the case of bit

device) -1

≤

max. device No.

• The station number, PC (PLC) number, number of devices, and sum check code are expressed in hexadecimal.

Computer Programmable

controller

E N Q

The sum check is calculated over this range

30H30H

0 0

46H46H

F F

57H57H

W W

30H04DH 30H34H36H30H 32H30H

M 0 6 4 0 0 2

05H

A C K

30H30H

0 5

46H46H

F F

06H

0010111001000 0100100110110 01111 1

6 5 6

12 69BA73

6 5 7

6 5 8

6 5 9

6 6 9

6 7 0

6 7 1

6 4 0

6 4 1

6 4 2

6 4 3

6 5 3

6 5 4

6 5 5

32H 37H34H33H 41H 36H39H42H

2 3 4 7 A B 9 6

35H30H

0 5

Notes

• Command WW uses word units. When writing 32 points, the number of devices is specified by “02” (1 6 points (bits) per one word unit).

FX communication

Commands 8

8-7

b ) Exa m p le 2

To write to data to two points, D0 and D1, at station No.0 (with message wait time set to 0 ms).

Computer Programmable

controller

E N Q

The sum check is calculated over this range

30H30H

0 0

46H46H

F F

57H57H

W W

30H044H 30H30H30H30H 32H30H

D 0 0 0 0 0 2

05H

A C K

30H30H

0 5

46H46H

F F

06H

31H 34H33H32H 41H 37H44H43H

1 2 3 4 A C D 7

39H46H

F 9

1234H(hexadecimal) to D0: indicates to write 4660 in decimal. ACD7H(hexadecimal) to D1: indicates to write -21289 in decimal.

FX communication

Commands 8

8-8

8.5 Test of Bit Device (BT command)

1 ) Command specification

Protocol format 1 is shown

2 ) Specification example

To set ON M50, OFF S100, and ON Y001 at station No.5 (with message wait time set to 0 ms).

Computer Programmable

controller

E N Q

Station

No.

PLC No.

B T

Message

wait time

Sum check

code

Station

No.

A C K

PLC No.

Test command (selective write,bits)

Device

(5 characters)

Number of

devices

(2 characters, hexadecimal)

1 character

Character area C

Set/reset

Device

(5 characters)

Set/reset

"0" (30H) indicates reset (OFF) "1" (31H) indicates set (ON)

Notes

• Specify the range and number of devices so as to satisfy the foll owing condition.

-1

≤

number of devices ≤ 20(10 for FX0N)

• The station number, PC (PLC) number, number of devices, and sum check code are expressed in hexadecimal.

Computer Programmable

controller

E N Q

Set (ON)

35H30H

0 5

46H46H

F F

54H42H

B T

30H033H30H

0 3

05H

A C K

35H30H

0 5

46H46H

F F

06H

4DH 35H30H30H 30H 31H

M 0 0 5 0 1

43H45H

E C

53H 30H31H30H 30H 30H

S 0 1 0 0 0

59H 30H30H30H 31H 31H

Y 0 0 0 1 1

Set (ON)Reset (OFF)

The sum check is calculated over this range

FX communication

Commands 8

8-9

8.6 Test of Word Device (WT command)

1 ) Command specification

Protocol format 1 is shown.

2 ) Specification example

To changing the present value of D500 to 1234H, bits Y100 to Y117 to BCA9H, and the present value of C100 to 100 at station No.5 (with message wait time set to 0 ms).

Computer Programmable

controller

E N Q

Station

No.

PLC No.

W T

Message

wait time

Sum check

code

Station

No.

A C K

PLC No.

Test command (selective write,word)

Device

(5 characters)

Number of

devices

(2 characters,

hexadecimal)

Character area C

When specifying bit devices,speci fy the He ad device.

Device

(4 characters)

Device

(5 characters)

Device

(4 characters)

One word device requires four hexadecimal digits. Therefore,one word is expressed using four characters.

Notes

• Specify the range and number of devices (16 bit words) so as to satisfy the following conditions.

-1

≤

number of devices ≤ 10 (6 for FX0N)(one unit is 16 points for bit devices)

• The station number, PC (PLC) number, number of devices, and sum check code are expressed in hexadecimal.

• C200 to C255 (CN200 to CN255) which are 32-bit devices cannot be handled in this command.

Computer Programmable

controller

E N Q

35H30H

0 5

46H46H

F F

54H57H

W T

30H033H30H

0 3

05H

A C K

30H30H

0 5

46H46H

F F

06H

44H 30H35H30H

30H 31H

D 0 5 0 0

37H30H

0 7

32H 34H33H

1 2 3 4

The sum check is calculated over this range

59H 30H31H30H 30H 42H

Y 0 1 0 0

43H 39H41H

B C A 9

43H 30H31H4EH 30H 30H

C N 1 0 0

30H 34H36H

0 0 6 4

Indicates to change the contents of D500 to 1234H or 4660 in decimal.

10110110111 00001

BC 9A

Y 1 0 6

1 0 7

Y 1 1 0

1 1 1

Y 1 1 2

Y 1 1 3

Y 1 1 4

1 1 5

Y 1 1 6

1 1 7

Indicates to change the present value of C100 to 64H or 100 in decimal.

Y 1 0 0

1 0 1

Y 1 0 2

Y 1 0 3

1 0 4

1 0 5

Each bit 0/1 indicates reset (OFF) or set (ON) respectivly.

FX communication

Commands 8

8-10

8.7 Remote RUN/STOP (RR, RS commands)

8.7.1 Operation of Remote RUN/STOP

When remote RUN/STOP is requested fr om the c omput er, the programmable contro ller forced run mode, and the special auxiliary relays M8035, M8036, M8037 are controlled as follows.

• Remote RUN When remote RUN (RR command) is requested, M8035 and M8036 are set ON at the

programmable controller, and forced RUN mode becomes active; the programmable controller switching to RUN. However, when remote run is executed while the programmable controller is running (forced or otherwise), the state is not changed , and the remote error code (18 H) is retur ned to the computer.

• Remote STOP When remote STOP (RS command) is req uested, M8037 is set ON at the programmable

controller. This in turn resets M8035, M8036 and M8037 to OFF and forced RUN mode is disabled; the programmable controller switching to STOP. However, when remote STOP is executes while the programmable controller is not in forced RUN mode, the state is not changed, and the remote error code (18H) is returned to the computer.

8.7.2 Conditions for Valid Execution of Remote RUN/STOP

The RUN terminal of the programmable controller is OFF, any built-in RUN/STOP switch is at STOP.

• Remote RUN The programmable controller should be stopped.

• Remote STOP The programmable controller should be in forced run mode.

Remote stop

Forced run mode

Special auxiliary relay M8037 is ON

Special auxiliary relays M8035, M8036, M8037 are OFF

Programmable controller is stopped.

Remote error code (18H) is returned to computer, and the state of programmable controller is not changed.

YES

Notes

• Forced RUN mode is not restored after a power failure. When the programmable controller is in forced RUN mode, if the power source is turned off and on, the special

auxiliary relays M8035, M8036, M80 37 are all reset to OFF, and the programmable controller remains in STOP.

FX communication

Commands 8

8-11

8.7.3 Control Specification and Examples of Remote RUN/STOP 1 ) Control specification

Protocol format 1 is shown.

2 ) Operation examples

a ) Exa m p le 1

To execute remote RUN at station No.5 (with a message wait time set to 0 ms).

b ) Exa m p le 2

To execute remote STOP at station No.0 (with message wait time set to 0 ms).

Computer Programmable

controller

E N Q

Station

No.

PLC No.

Message

wait time

Sum check

code

Station

No.

A C K

PLC No.

Programmable controller remote run command: "RR" Programmable controller remote stop command: "RS"

Notes

• The station number, PC (PLC) number, number of devices, and sum check code are expressed in hexadecimal.

Computer Programmable

controller

E N Q

35H30H

0 5

46H46H

F F

52H52H

R R

30H035H43H

C 5

05H

A C K

35H30H

0 5

46H46H

F F

06H

The sum check is calculated over this range

Computer Programmable

controller

E N Q

30H30H

0 0

46H46H

F F

53H52H

R S

30H031H43H

C 1

05H

A C K

30H30H

0 0

46H46H

F F

06H

The sum check is calculated over this range

FX communication

Commands 8

8-12

8.8 Reading The Programmable Controller Type (PC command)

8.8.1 T ype Codes

Programmable controller type

Type code

(hex.)

Programmable controller type

Type code

(hex.)

F2H A2USCPU 82H

8EH A2CPU-A1, A2USCPU-S1 83H FX, FX2C 8DH A3CPU, A3NCPU A3H FX

9EH A3ACPU 94H FX2N, FX

2NC

9DH A3HCPU, A3MCPU A4H A0J2HCPU 98H A3UCPU 84H A1CPU, A1NCPU A1H A4UCPU 85H A1SCPU, A1SJCPU 98H A52GCPU 9AH A2CPU(-S1), A2NCPU(-S1), A2SCPU A2H A73CPU A3H A2ACPU 92H A7LMS-F A3H A2ACPU-S1 93H AJ72P25/R25 ABH A2CCPU 9AH AJ72LP25/BR15 8BH

FX communication

Commands 8

8-13

8.8.2 Control Specification and Example 1 ) Control specification

Protocol format 1 is shown.

2 ) Specification example

To read the type name from station No.15 (with message wait time set to 0 ms)

Computer Programmable

controller

E N Q

Station

No.

PLC No.

P C

Message

wait time

Sum check

code

Station

No.

S T X

PLC No.

PC type

name

(2 characters)

E T X

Sum check

code

Station

No.

A C K

PLC No.

Character area B

Programmable controller type name read command

Notes

• The station number, PC (PLC) number, number of devices, and sum check code are expressed in hexadecimal.

Computer Programmable

controller

E N

The sum check is calculated over this range

46H30H

0 F

46H46H

F F

43H50H

P L C

30H035H43H

C 5

05H

46H

30H

0 F

46H

F F

02H

E T X

31H38H

8 1

03H

A C K

46H30H

0 F

46H46H

F F

06H

Indicates station No. 15 ("0F" in hexadecimal).

Indicates the type name of the Programmable controller is FX, FX2C series.

44H38H

8 D

FX communication

Commands 8

8-14

8.9 Global Fu nc ti on (G W co m m a nd )

This function is to turn on and off the global operation flag at all stations in the multidrop link. For an FX series programmable controller this is special auxiliary M8126, and for an A series programmable controller, it is Xn2 of the computer link unit. This function can be used for initialization, resetting or simultaneous start/stop of all programmable controller stations.

8.9.1 Control Specification and Example of Global Function

The global function is to turn on or off the special auxiliary relay M8126 (global operation flag) at all stations in the multidrop link.

• The station number specified in the control protocol must indicate all stations, and is hence specified as FFH (“FF”). If other than FFH is specified as the station number, the special auxiliary relay M8126 of the specified station is turned on/off.

• No reply is given by the programmable controll er to this command.

• If the programmable controller power is t urned off , the comm unicat ion format changed, or the programmab le control ler is sto pped, the spe cial aux iliary rela y M8126 of that station i s turned off, and the global funct ion operation is cleared.

1 ) Control specification

Protocol format 1 is shown.

2 ) Specification example

To turn on the global operation flag at all programmable controller stations in the computer link; auxiliary relay M8126 in an FX series PLC station, and Xn2 in an A series programmable controller station.

Computer Programmable

controller

E N Q

Station

No.

PLC No.

G W

Message

wait time

Sum check

code

Control flag

(1 characters)

Character area AGlobal function command

When data value is "1" (31H), global operation flag is tumed on. When data value is "0" (30H), global operation flag is tumed off.

Notes

• The station number, PC (PLC) number, number of devices, and sum check code are expressed in hexadecimal.

Computer Prpgrammable

controller

E N Q

The sum check is calculated over this range

46H

F F

46H

F F

57H

47H

G W

30H

37H31H

1 7

05H

"FF" is specified to indicate all stations. For a specific station, specify the station number between "00" to "0F" ("00" to "1F" for A series).

Indicates that the global operation flag is turned ON.

31H

FX communication

Commands 8

8-15

8.10 On-demand Function

Data transmission between the computer and programmable controller is usually initiated by the computer only. The on-demand function is used if there is a n eed to transmit data from the programmable controller to the computer. The range of data registers containing the data to be sent is specified in special data registers.

8.10.1 Special Devices Used in On-demand Function

The special data registers and auxiliar y relays used in the on-demand function are explained in the following table.

Device Name Description

M8127

On-demand handshake signal

On during execution of on-demand ON: on-demand data being transmitted OFF: on-demand data transmission complete

M8128 On-demand error flag

On if there is error in specified value for data transmission in on demand ON: error OFF: no error

M8129

Flag for specifying word or byte data format

Word/byte data format for on-demand data. ON: byte units (8-bits per data register) OFF: word units (16-bits per data register)

D8127

On-demand head device number register

The head device number of the data area in which the data to be transmitted is stored. Set by programmable controller’s program.

D8128

On-demand data length register

The data length to be transmitted by on-demand. Set by programmable controller’s program.

Program

Programmable controller

Computer

D8127 D8128

D(n) D(n+m-1)

Head address

Data length

Notes

• This function can only be used when the configuration of the computer and programmable controller is 1:1.

Notes

• The on-demand handshake signal is turned on when data transmission to the computer is started from the programmable controller, and is turned off when transmission of the specified data i s comple te. This is used as an interlock so that multiple on-demand requests can not be issued simultaneously.

FX communication

Commands 8

8-16

8.10.2 On-demand Control Protocol

1 ) Control protocol programmable controller

2 ) Control protocol at computer

Transmission error check

On-demand data transmission

Set the word/byte data format

Set the on-demand data

Reset the on-demand error flag

Start on-demand

Transmission Complete

Set on/off special M8129. ON: byte units(8bits), OFF: word units(16bits)

Write the data to be transmitted into data registers.

Turn off on-demand error flag special M8128. (If special M8128 is ON, on-demand can not be started.)

On-demand is started by writing the head device number where the data is stored into special M8127, and writing the data length into special D8128. When the request is received, special M8127 is turned on, and when transmission is completed, M8127 is turned off.

If the on-demand error flag special M8128 is ON, the data was not transmitted due to a transmission error.

Error

No error

……

On-demand Receive

Check that the received data is on-demand data.

Data processing

Completion of Receive

On-demand data has a PLC numbe r of “FE” automatically attached. This can b e used to identify on-demand data.

……

FX communication

Commands 8

8-17

3 ) On-demand request time chart.

• When the computer is transmitting data

a ) When on-demand is requested, the on-demand execution signal (special M8127) is

immediately turned on.

b ) Transmission of on-demand data is forced to wait until completion of reception of

command data (ENQ-) from the computer.

c ) Transmission of response data (STX-) to command data (ENQ-) is forced to wait until

completion of transmission of on-demand data.

• When the computer is receiving data

a ) When on-demand is requested, the on-demand execution signal (special M8127) is

immediately turned on.

b ) Transmission of on-demand data is forced to wait until completion of transmission of

response data (STX-) to the command data (ENQ-) from the computer.

c ) Transmission of response data (ACK-) from the computer to the transmission of response

data (STX-) from the programmable controller should be done after completion of reception of on-demand data.

Computer Programmable

controller

E N Q

S T X

A C K

On-demand execution flag M8127

Start on-demand,

writing of the on-

demand data length

b) On-demand data

Programmable controller

Computer Programmable

controller

E N Q

S T X

A C K

On-demand execution flag M8127

Start on-demand, writing of the ondemand data length

On-demand data

Programmable controller

FX communication

Commands 8

8-18

8.10.3 Specification and Example of On-demand 1 ) Command specification

Protocol format 1 is shown.

Programmable controller

Special auxiliary relay M8127

Write processing

Computer Programmable

controller

S T X

Station

No.

PLC No.

Sum check

code

Transmission

data

Added by programmable controller

E T X

OFF

On-demand data is set, the head address is written to D8127 and the data length is written to D8128.

Notes

• Specify the data length so as to satisfy the following condition. Data length

≤

40H (64 points)(13 points for FX0N)

• The PLC number, “FE” is added by the programmab le controller.

• The station number, PLC number, number of devices, and sum check code are expressed in hexadecimal.

Important

• Don't use the on-demand function unless the system configuration is 1:1.

• If the on-demand function is used in a multidrop system in which the computer and the programmable controller are connected in 1:n configuration, no rmal co mmunication data in control protocol formats 1 to 4, and on-de mand data become con fused, and normal data transmission is not possible.

FX communication

Commands 8

8-19

2 ) Specification Example 1

To transmit the data stored in data registers D100 and D101 from the programmable controller (when the station number is 0, and data is specified in word units)

Program example

Programmable controller

M8127

Write processing

Computer Programmable

controller

Set ON if a transmission error occurs

S T X

30H30H

0 0

45H46H

F E

32H31H

1 2 3 4

33H 35H34H

02H

E T X

32H39H

9 2

03H

The PLC number "FE" is automatically added by the programmable controller.

36H37H38H

5 6 7 8

The 4 hexadecimal digits of each word are transmitted in ASCII, starting with the most significant digit.

D8127 D8128

100

On-demand command

➀

➁

M8128 M8129

ON/OFF

OFF

D100 D101

1234H 5678H

X000

M8129

M8000

M8002

PLS M0

M0 M8127

H1234 D100

FNC 12

MOV

H5678 D101

RST M8128 RST Y000 RST Y001

K100 D8127

FNC 12

MOV

K2 D8128

FNC 12

MOV

SET Y000 SET Y001

END

Data transmission set to word units. Start command signals a pulse.

Transmission data is set.

On-demand error flag is reset (cannot start if M8128 is ON)

On-demand is started by specifying transmission data area head address and data length.

Confirming on-demand error, normal/abnormal external output is set.

M8127 M8128

M8128

· · · · · · · · ·

· · · · · · ·

· · · · · · · · ·

· · · · · · ·

M8128 OFF : Normally transmitted.

ON : Data is not transmitted due to error.

FNC 12

MOV

FX communication

Commands 8

8-20

3 ) Specification Example 2

To transmit the data stored in data registers D100 and D101 from the programmable controller (when the station number is 0, and data is specified in byte units)

Program example

Programmable controller

M8127

Write processing

Computer Programmable

controller

Set ON if a transmission error occurs

S T X

30H30H

0 0

45H46H

F E

32H31H

3 4 1 2

33H 37H34H

02H

E T X

32H39H

9 2

03H

The PC number "FE" is automatically added by the programmable controller

38H 35H 36H

7 8 5 6

The 2 hexadecimal digits of each byte are transmitted in ASCII, starting with the most significant digit.The lower byte of each word is transmitted first.

D8127 D8128

100

On-demand command

➀

➁

M8128 M8129

ON/OFF

D100 D101

1234H 5678H

X000

M8129

M8000

M8002

PLS M0

M0 M8127

H1234 D100

FNC 12

MOV

H5678 D101

FNC 12

MOV

RST M8128 RST Y000 RST Y001

K100 D8127

FNC 12

MOV

K4 D8128

FNC 12

MOV

SET Y000 SET Y001

END

Data transmission set to byte units. Start command signals a pulse.

Transmission data is set.

On-demand error flag is reset (cannot start if M8128 is ON)

Confirming on-demand error, normal/ abnormal external output is set.

M8127 M8128

M8128

· · · · · · · · ·

· · · · · · ·

· · · · · · · · ·

· · · · · · ·

M8128 OFF : Normally transmitted.

ON : Data is not transmitted due to error.

Mitsubishi Electric MELSEC FX, RS-232C, RS-422, RS-485 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual