Mitsubishi Electronics A1SJ71AR23Q, A1SJ71AP23Q, A1SJ71AT23BQ User Manual

Download

MELSECNET, MELSECNET/B Local Station Data Link Module User's Manual

-A1SJ71AP23Q

-A1SJ71AR23Q

-A1SJ71AT23BQ

SAFETY PRECAUTIONS

WARNING

CAUTION

Indicates that incorrect handling may cause hazardous conditions, resulting in death or severe injury.

Indicates that incorrect handling may cause hazardous conditions, resulting in minor or moderate injury or property damage.

(Always read these instructions before using this product)

Before using this product, please read this manual and the relevant manuals introduced in this manual carefully and pay full attention to safety to handle the product correctly. The precautions given in this manual are concerned with this product only. For the safety precautions of the programmable controller system, please read the User's Manual for the CPU module used.

In this manual, the safety precautions are classified into two levels: " WARNING" and " CAUTION".

Note that the CAUTION level may lead to a serious consequence according to the circumstances. Observe the precautions of both levels because they are important for personal and system safety.

Please save this manual to make it accessible when required and always forward it to the end user.

[DESIGN PRECAUTIONS]

WARNING

● For each station's operating status in the case of a communication error in the network, refer to this manual. A malfunction due to a communication error may result in an accident.

● To control a running programmable controller (data modification) by connecting GX Developer to a CPU module or connecting a personal computer to an intelligent function module (special function module), create an interlock circuit on the sequence program so that the entire system will function safely all the time. Also, before performing any other controls (e.g. program modification, operating status change (status control)) to the programmable controller, read the manual carefully and ensure the safety. Especially, in the case of controlling a remotely-located programmable controller from an external device, a programmable controller side problem could not be resolved immediately due to data communication failure. To prevent this, establish corrective procedures for communication failure between the external device and the programmable controller CPU, as well as creating an interlock circuit on the program.

CAUTION

● Do not install the control lines and/or communication cables together with the main circuit or power cables, and also do not bring them close to each other. Keep a distance of 100mm (3.94 inch) or more between them. Failure to do so may cause a malfunction due to noise.

A - 1

[INSTALLATION PRECAUTIONS]

CAUTION

● Use the programmable controller in the environment conditions given in the general specifications of the User's Manual for the CPU module used. Failure to do so may cause an electric shock, fire, malfunction, or damage to or deterioration of the product.

● Insert the module fixing projection into the module fixing hole in the base unit to mount the module.(For the AnS series module, fix it to the base unit with screws within the specified torque.) Incorrect module mounting may cause a malfunction, failure, or drop of the module.

● Be sure to shut off all phases of the external power supply used by the system before mounting or removing the module. Failure to do so may damage the module.

● Do not directly touch any conductive part or electronic component of the module. Doing so may cause a malfunction or failure of the module.

[WIRING PRECAUTIONS]

WARNING

● Be sure to shut off all phases of the external power supply before installation or wiring. Failure to do so may result in an electric shock or damage to the product.

CAUTION

● Properly solder a connector for coaxial cable. Failure to do so may cause malfunction.

● Be careful to prevent foreign matter such as dust or wire chips from entering the module. Failure to do so may cause a fire, failure or malfunction.

● Be sure to place the communication cables or power cables in a duct or clamp them. If not, dangling cables may swing or inadvertently be pulled, resulting in damage to the module or cables, or malfunctions due to poor cable contact.

A - 2

[WIRING PRECAUTIONS]

CAUTION

● When disconnecting a communication cable or power cable, do not pull it by holding the cable part.

To disconnect the cable, hold its connector that is plugged into the module. Loosen screws for a terminal block before disconnecting a cable for connecting terminal block. Pulling the cable part with the cable still connected to the module may damage the module and/or cable, or cause malfunctions due to poor cable contact.

[START-UP AND MAINTENANCE PRECAUTIONS]

CAUTION

● Do not disassemble or remodel each of the modules.

Doing so may cause failure, malfunctions, personal injuries and/or a fire.

● When using a wireless communication device such as a mobile phone, keep a distance of 25cm

(9.85 inch) or more from the programmable controller in all directions. Failure to do so may cause malfunctions.

● Be sure to shut off all phases of the external power supply used by the system before mounting or

removing the module. Not doing so may damage the product.

● Do not touch terminals during power-on.

Doing so may cause malfunctions.

● Be sure to shut off all phases of the external power supply used by the system before cleaning or

retightening the terminal screw or module mounting screw. Not doing so may cause a failure or malfunction of the module. If the screw is too loose, it may cause a drop, short circuit or malfunction. Excessive tightening may cause damage to the screw and/or module, resulting in a drop, short circuit or malfunction.

● Before handling the module, touch a grounded metal object to discharge the static electricity from

the human body. Not doing so may cause a failure or malfunction of the module.

[DISPOSAL PRECAUTIONS]

CAUTION

● When disposing of the product, treat it as industrial waste.

A - 3

CONDITIONS OF USE FOR THE PRODUCT

(1) Mitsubishi programmable controller ("the PRODUCT") shall be used in conditions;

i) where any problem, fault or failure occurring in the PRODUCT, if any, shall not lead to any major or serious accident; and ii) where the backup and fail-safe function are systematically or automatically provided outside of the PRODUCT for the case of any problem, fault or failure occurring in the PRODUCT.

(2) The PRODUCT has been designed and manufactured for the purpose of being used in general

industries. MITSUBISHI SHALL HAVE NO RESPONSIBILITY OR LIABILITY (INCLUDING, BUT NOT LIMITED TO ANY AND ALL RESPONSIBILITY OR LIABILITY BASED ON CONTRACT, WARRANTY, TORT, PRODUCT LIABILITY) FOR ANY INJURY OR DEATH TO PERSONS OR LOSS OR DAMAGE TO PROPERTY CAUSED BY the PRODUCT THAT ARE OPERATED OR USED IN APPLICATION NOT INTENDED OR EXCLUDED BY INSTRUCTIONS, PRECAUTIONS, OR WARNING CONTAINED IN MITSUBISHI'S USER, INSTRUCTION AND/OR SAFETY MANUALS, TECHNICAL BULLETINS AND GUIDELINES FOR the PRODUCT. ("Prohibited Application") Prohibited Applications include, but not limited to, the use of the PRODUCT in;

• Nuclear Power Plants and any other power plants operated by Power companies, and/or any other cases in which the public could be affected if any problem or fault occurs in the PRODUCT.

• Railway companies or Public service purposes, and/or any other cases in which establishment of a special quality assurance system is required by the Purchaser or End User.

• Aircraft or Aerospace, Medical applications, Train equipment, transport equipment such as Elevator and Escalator, Incineration and Fuel devices, Vehicles, Manned transportation, Equipment for Recreation and Amusement, and Safety devices, handling of Nuclear or Hazardous Materials or Chemicals, Mining and Drilling, and/or other applications where there is a significant risk of injury to the public or property.

Notwithstanding the above, restrictions Mitsubishi may in its sole discretion, authorize use of the PRODUCT in one or more of the Prohibited Applications, provided that the usage of the PRODUCT is limited only for the specific applications agreed to by Mitsubishi and provided further that no special quality assurance or fail-safe, redundant or other safety features which exceed the general specifications of the PRODUCTs are required. For details, please contact the Mitsubishi representative in your region.

A - 4

REVISIONS

Correction

Addition

Correction

Addition

*The manual number is given on the bottom left of the cover.

Print Date *Manual Number Revision

Mar., 2007 SH(NA)-080670ENG-A First edition

Oct., 2007 SH(NA)-080670ENG-B

Section 2.2, 3.1

Aug., 2010 SH(NA)-080670ENG-C

SAFETY PRECAUTIONS, Section 2.2, 3.2.1, 3.2.2, 3.4.2, 7.2, Appendix 4.2,

WARRANTY

CONDITIONS OF USE FOR THE PRODUCT

Apr., 2011 SH(NA)-080670ENG-D

Section 3.6.4, 3.6.5, 7.2, 8.1.2, Appendix 4.2

Oct., 2011 SH(NA)-080670ENG-E

SAFETY PRECAUTIONS, COMPLIANCE WITH THE EMC AND LOW

VOLTAGE DIRECTIVES, GENERIC TERMS AND ABBRERVIATIONS,

Chapter 1, Section 1.1, 2.2

Dec., 2014 SH(NA)-080670ENG-F

COMPLIANCE WITH THE EMC AND LOW VOLTAGE DIRECTIVES, HOW TO

READ THIS MANUAL, Chapter 1, Section 1.1, 2.2, Chapter 3, Section 5.1, 5.3,

6.2.1, 7.2, 8.1.4, Appendix 4.2

Appendix 3

Japanese Manual Version SH-080669-G

This manual confers no industrial property rights or any rights of any other kind, nor does it confer any patent licenses.

Mitsubishi Electric Corporation cannot be held responsible for any problems involving industrial property rights which may

occur as a result of using the contents noted in this manual.

2007 MITSUBISHI ELECTRIC CORPORATION

A - 5

INTRODUCTION

Thank you for choosing the Mitsubishi MELSEC-AnS Series of General Purpose Programmable Controllers. Before using the equipment, please read this manual carefully to develop full familiarity with the functions and performance of the AnS series programmable controller you have purchased, so as to ensure correct use.

SAFETY PRECAUTIONS .................................................................................................................................A - 1

CONDITIONS OF USE FOR THE PRODUCT..................................................................................................A - 4

REVISIONS.......................................................................................................................................................A - 5

INTRODUCTION...............................................................................................................................................A - 6

CONTENTS ...................................................................................................................................................... A - 6

ABOUT MANUALS ........................................................................................................................................... A - 9

COMPLIANCE WITH THE EMC AND LOW VOLTAGE DIRECTIVES.............................................................A - 9

HOW TO READ THIS MANUAL .....................................................................................................................A - 10

GENERIC TERMS AND ABBRERVIATIONS ................................................................................................. A - 11

DEFINITIONS OF TERMINOLOGY ................................................................................................................ A - 12

PACKING LIST ...............................................................................................................................................A - 13

CHAPTER1 OVERVIEW 1 - 1 to 1 - 5

1.1 Features........................................................................................................................................... 1 - 2

CHAPTER2 SYSTEM CONFIGURATION 2 - 1 to 2 - 5

2.1 Overall System Configuration .......................................................................................................... 2 - 1

2.2 Applicable Systems ......................................................................................................................... 2 - 4

2.2.1 Applicable system for Q series ................................................................................................. 2 - 4

2.2.2 Applicable system for L series.................................................................................................. 2 - 5

CHAPTER3 SPECIFICATIONS 3 - 1 to 3 - 29

3.1 Performance Specifications ............................................................................................................. 3 - 1

3.2 Cable Specifications ........................................................................................................................ 3 - 5

3.2.1 Optical fiber cable ..................................................................................................................... 3 - 5

3.2.2 Coaxial cable ............................................................................................................................ 3 - 6

3.2.3 Shielded twisted pair cable ....................................................................................................... 3 - 9

3.3 Function List .................................................................................................................................. 3 - 10

3.4 I/O Signal for Programmable Controller CPU ................................................................................ 3 - 11

3.4.1 List of I/O signal ...................................................................................................................... 3 - 11

3.4.2 Details of I/O signal................................................................................................................. 3 - 13

3.5 Buffer Memory List......................................................................................................................... 3 - 15

3.6 Details of Buffer Memory ............................................................................................................... 3 - 17

3.6.1 Precautions............................................................................................................................. 3 - 17

A - 6

3.6.2 Presence or absence of refresh information table .................................................................. 3 - 18

3.6.3 Refresh information table ....................................................................................................... 3 - 19

3.6.4 LRDP instruction receive request/receive result/work area .................................................... 3 - 22

3.6.5 LWTP instruction receive request/receive result/work area ................................................... 3 - 24

3.6.6 Special relay (for link) (M9200 to M9255)............................................................................... 3 - 26

3.6.7 Special register (for link) (D9200 to D9255) ........................................................................... 3 - 26

3.6.8 Input (X0 to X7FF) and output (Y0 to Y7FF) .......................................................................... 3 - 27

3.6.9 Link relay (B0 to BFFF) .......................................................................................................... 3 - 28

3.6.10 Link register (W0 to WFFF) .................................................................................................... 3 - 29

CHAPTER4 FUNCTIONS 4 - 1 to 4 - 11

4.1 Cyclic Transmission Function .......................................................................................................... 4 - 1

4.1.1 1 : n communication (B/W communication) .............................................................................. 4 - 1

4.1.2 1 : 1 communication (X/Y communication) ............................................................................... 4 - 5

4.2 Transient Transmission Function..................................................................................................... 4 - 6

4.3 RAS Functions................................................................................................................................. 4 - 8

4.3.1 Automatic return function.......................................................................................................... 4 - 8

4.3.2 Loopback function .................................................................................................................... 4 - 9

4.3.3 Error detection function .......................................................................................................... 4 - 11

CHAPTER5 PREPARATORY PROCEDURES BEFORE OPERATION 5 - 1 to 5 - 21

5.1 Implementation and Installation ....................................................................................................... 5 - 1

5.1.1 Handling precautions ................................................................................................................ 5 - 1

5.2 Preparatory Procedures before Operation....................................................................................... 5 - 2

5.3 Part Names and Settings ................................................................................................................. 5 - 3

5.4 Wiring............................................................................................................................................... 5 - 7

5.4.1 Optical fiber cable ..................................................................................................................... 5 - 7

5.4.2 Coaxial cable ............................................................................................................................ 5 - 9

5.4.3 Shielded twisted pair cable..................................................................................................... 5 - 11

5.5 Self-diagnostic Test ....................................................................................................................... 5 - 12

5.5.1 Self-loopback test ................................................................................................................... 5 - 13

5.5.2 Station-to-station test.............................................................................................................. 5 - 16

5.5.3 Forward loop test/reverse loop test ........................................................................................5 - 19

CHAPTER6 LINK DATA SEND/RECEIVE PROCESSING AND PROCESSING TIME

6 - 1 to 6 - 11

6.1 Link Data Send/Receive Processing ............................................................................................... 6 - 1

6.1.1 Send/receive processing overview ...........................................................................................6 - 1

6.1.2 Link refresh timing .................................................................................................................... 6 - 2

6.1.3 Link data handling in the case of a communication error ......................................................... 6 - 3

6.2 Transmission Delay Time ................................................................................................................ 6 - 5

6.2.1 Transmission delay time ........................................................................................................... 6 - 5

6.2.2 Link refresh time ....................................................................................................................... 6 - 7

6.2.3 Link data send/receive time (Link scan) ................................................................................... 6 - 8

A - 7

CHAPTER7 PROGRAMMING 7 - 1 to 7 - 16

7.1 System Configuration and Setting Conditions ................................................................................. 7 - 1

7.2 Program for Refresh and for Receiving LRDP/LWTP Instruction .................................................... 7 - 3

CHAPTER8 TROUBLESHOOTING 8 - 1 to 8 - 15

8.1 Troubleshooting Flowchart .............................................................................................................. 8 - 2

8.1.1 When "Data link is disabled in the entire system"..................................................................... 8 - 3

8.1.2 When "Data link is disabled at a specific station" ..................................................................... 8 - 5

8.1.3 When "Error is found in data transmission" .............................................................................. 8 - 7

8.1.4 When "Communication error is detected in some slave stations" .......................................... 8 - 12

8.2 Connecting GX Developer to Master Station for Error Checking................................................... 8 - 13

8.3 Checking Error with LEDs of Link Module on Faulty Station ......................................................... 8 - 14

8.4 Checking the Program for Refresh ................................................................................................ 8 - 15

APPENDICES App - 1 to App - 25

Appendix 1 List of Special Relays (for Link) ........................................................................................App - 1

Appendix 2 List of Special Registers (for Link)....................................................................................App - 3

Appendix 3 Steps to Create a Program for L Series ...........................................................................App - 5

Appendix 4 Replacing Local Station from A/QnA Series to Q Series .................................................. App - 9

Appendix 4.1 Differences between Q series and A/QnA series local stations ...............................App - 9

Appendix 4.2 When utilizing an existing project of the A/QnA series local station .......................App - 11

Appendix 5 Program for Refresh when Using Multiple Local Modules..............................................App - 13

Appendix 5.1 System configuration and setting conditions ..........................................................App - 14

Appendix 5.2 Program for refresh ................................................................................................App - 16

Appendix 6 External Dimensions.......................................................................................................App - 23

Appendix 6.1 A1SJ71AP23Q .......................................................................................................App - 23

Appendix 6.2 A1SJ71AR23Q ....................................................................................................... App - 24

Appendix 6.3 A1SJ71AT23BQ ..................................................................................................... App - 25

INDEX Index - 1 to Index - 1

A - 8

ABOUT MANUALS

Related manual

The following manuals are also related to this product. Order them by referring to the table below as necessary.

Manual name

Type MELSECNET, MELSECNET/B Data Link System Reference Manual

This manual explains specifications, data link setting, preparatory procedures before operation, programming,

and troubleshooting of the MELSECNET or MELSECNET/B data link system.

(Sold separately)

COMPLIANCE WITH THE EMC AND LOW VOLTAGE DIRECTIVES

(1) Method of ensuring compliance

To ensure that Mitsubishi programmable controllers maintain EMC and Low Voltage Directives when incorporated into other machinery or equipment, certain measures may be necessary. Please refer to one of the following manuals.

• User’s manual for the CPU module used

• Safety Guidelines (This manual is included with the CPU module or the base unit.)

The CE mark on the side of the programmable controller indicates compliance with EMC and Low Voltage Directives.

(2) Additional measures

To ensure that this product maintains EMC and Low Voltage Directives, please refer to one of the manuals listed in (1).

Manual No.

(Model code)

IB-66350

(13JF70)

A - 9

HOW TO READ THIS MANUAL

Station No.

Abbreviation

Network No.

1 to 64

P: Control station, NS: Normal station

1 to 239

The following explains how to interpret the symbols for network station types that are used in the text, tables, and figures.

(1) MELSECNET or MELSECNET/B data link system

Abbreviation of network type Description

M station Master station for the second tier

L station Local station in the second tier

R station Remote I/O station in the second tier

L/m station Local station in the second tier/master station for the third tier

l station Local station in the third tier

r station Remote I/O station in the third tier

(2) MELSECNET/H network system

(Example)

• Network No.1, control station, station No.1 1M

• Network No.1, normal station, station No.2 1N

(3) When using this product in the system of L series

Where there is no difference between Q series and L series, the description is given for Q series only; in reading this manual, substitute "Q" with "L" where appropriate. Here are examples of how to substitute the character:

Description in this manual (Q) After substitution (L)

Q series L series

QA1S5 B LA1S5 B

QA1S6 B LA1S6 B

QCPU LCPU

A - 10

GENERIC TERMS AND ABBRERVIATIONS

This manual describes the MELSECNET or MELSECNET/B local station data link module using the following generic terms and abbreviations, unless otherwise specified.

Generic term/

abbreviation

Generic product name for SWnD5C-GPPW-E, SWnD5C-GPPW-EA, SWnD5C-GPPW-EV, and

GX Developer

GX Works2 Generic product name of SWnDNC-GXW2-E ("n" represents the version.)

MELSECNET Abbreviation for the MELSECNET data link system

MELSECNET/B Abbreviation for the MELSECNET/B data link system

MELSECNET/H Abbreviation for the MELSECNET/H network system

MELSECNET (II) Generic term for the MELSECNET or MELSECNET/B data link system

Local module

Link module Abbreviation for the MELSECNET or MELSECNET/B data link module

QA1S5 B

QA1S6 B

SWnD5C-GPPW-EVA. ("n" means version 4 or later.)

"-A" and "-V" mean "volume license product" and "version-upgrade product" respectively.

Abbreviation for the A1SJ71AP23Q or A1SJ71AR23Q type MELSECNET local station data link

module and the A1SJ71AT23BQ type MELSECNET/B local station data link module

Another term for the QA1S51B extension base unit

Generic term for the QA1S65B and QA1S68B extension base units

Description

A - 11

DEFINITIONS OF TERMINOLOGY

The following explains definitions of the terms used in this manual.

Term Description

RAS

Master station

Local station

Remote I/O station

Abbreviation for Reliability, Availability, and Serviceability.

This term is used to express the overall usability of automation systems.

Station that controls slave stations (local station and remote I/O station) connected to the data

link system.

It sets the link parameter for the data link system.

One master station is required per data link system.

The station No. of the master station is set to "00".

Station that controls the I/O module or intelligent function module (special function module) of

the host station in the program of the host station, incorporating link data (B, W, X) of the data

link system.

Station that controls the I/O module or special function module of the host station in the

program of the master station.

A - 12

PACKING LIST

Model Product name Quantity

A1SJ71AP23Q

A1SJ71AR23Q

A1SJ71AT23BQ

The followings are included in the package.

A1SJ71AP23Q type MELSECNET local station data link module

(Applicable cable: optical fiber cable)

A1SJ71AR23Q type MELSECNET local station data link module

(Applicable cable: coaxial cable)

A1SJ71AT23BQ type MELSECNET/B local station data link module

(Applicable cable: shielded twisted pair cable)

Terminating resistor (110 , 1/2W)

A - 13

POINT

MELSECNET (II)

Local module

Q series programmable controller (Main base unit)

Master station

Local station

Q series local station

(QA1S5 B extension base unit or QA1S6 B extension base unit)

OVERVIEW

CHAPTER1 OVERVIEW

This manual describes the specification, function, preparatory procedures before operation, programming, and troubleshooting of the following data link module (hereinafter referred to as a local module).

• A1SJ71AP23Q type MELSECNET local station data link module

• A1SJ71AR23Q type MELSECNET local station data link module

• A1SJ71AT23BQ type MELSECNET/B local station data link module When applying a program example introduced in this manual to the actual system, make sure to examine the applicability and confirm that it will not cause system control problems.

The local module can mount the Q series programmable controller as a local station in the second tier or local station in the third tier of the MELSECNET or MELSECNET/B data link system. Mount the local module to the following base unit.

• QA1S5 B extension base unit

• QA1S6 B extension base unit

1 - 1

Figure 1.1 MELSECNET or MELSECNET/B data link system

(1) This manual describes necessary information to add or replace a Q series

local station in the MELSECNET or MELSECNET/B data link system. For the details of the MELSECNET or MELSECNET/B data link system, refer to the following manual.

Type MELSECNET, MELSECNET/B Data Link System Reference

Manual.

(2) Where there is no difference between Q series and L series, the description is

given for Q series only; substitute "Q" with "L" where appropriate.

Data memory

storage area

Q series local station

Local module

CPU module

Master station

Link data

storage area

Link data

storage area

Buffer memoryBuffer memory

Data memory

storage area

Data memory

storage area

Local station

Link data

storage area

Link scan

Link refresh

Data flow (Send/receive processing)

Data memory

storage area

Q series local station

Local module

CPU module

Master station

Link data

storage area

Link data

storage area

Buffer memoryBuffer memory

Data memory

storage area

Link scan

Link refresh

Data flow (Send/receive processing)

OVERVIEW

1.1 Features

This section describes features of a local module.

(1) Cyclic transmission function

The data can be communicated between master and local stations cyclically.

(a) 1: n communication (B/W communication)

Data is communicated between the master station and a local station and between local stations. In this communication, ON/OFF information and 16-bit data are communicated.

1) The ON/OFF information is communicated by link relays (B).

2) The 16-bit data is communicated by link registers (W).

OVERVIEW

SYSTEM

CONFIGURATION

SPECIFICATIONS

FUNCTIONS

Figure 1.2 B/W communication data flow

(b) 1:1 communication (X/Y communication)

The one-to-one data communication is performed between the master station and a local station. The ON/OFF information can be communicated using the input (X)/output (Y).

Figure 1.3 X/Y communication data flow

1.1 Features

1 - 2

PREPARATORY

PROCEDURES BEFORE

OPERATION

LINK DATA SEND/

RECEIVE PROCESSING

AND PROCESSING TIME

PROGRAMMING

TROUBLESHOOTING

Q series local station

Local module CPU module

Link data

storage area

Buffer memory

Data memory

storage area

Link scan

Link refresh

Data flow (Send/receive processing)

4FF

500

5FF

Receive processing

DMOV Z0

BMOV W0Z0 Z1

Send processing

W0 to WFF

W100 to W1FF

"A part" of the program for refresh

U0\ G4

U0\ G1024Z0

DMOV Z0

U0\ G2

BMOV W0Z0 Z1

U0\ G1024Z0

W0 to WFF

W100 to W1FF

OVERVIEW

The method of link refresh for a Q series local station and the master station is different from that of link refresh for an A/QnA series local station.

1) Q series local station Refresh is performed in the sequence program.

CHAPTER 7 PROGRAMMING

Figure 1.4 Link refresh of link data (Q series local station)

2) Master station and A/QnA series local station The data is refreshed automatically at either of the following timing.

• Upon completion of link scan

• Only after execution of the END instruction in the sequence program For the AnUCPU, QnACPU, A2US(H)CPU(S1) and Q2AS(H)CPU(S1), refresh ranges can be changed with refresh parameters.

Master station and local station for A/QnA series

Link module CPU module

Link data

storage area

W0 to WFF

W100 to W1FF

1 - 3

Figure 1.5 Link refresh of link data (Master station and A/QnA series local station)

1.1 Features

Data memory

storage area

W0 to WFF

W100 to W1FF

Data flow (Send/receive processing)

Link scan

Link refresh

Q series local station

Local module

CPU module

Link data

storage area

Buffer memory

Data memory

storage area

DCH

DMOV Z0

BMOV D0Z1 Z2

Write data

Master station

Data memory

storage area

D20 to D29

Command

LWTP

Device write

D200 to D209

= K4

MOV Z2

= H4420 Z0

U0\ G174

U0\ G220

U0\ G216

U0\ G219

"A part" of the program for receiving LWTP instruction

A/QnA series local station

Link module

CPU module

Data memory

storage area

Master station

Data memory

storage area

D20 to D29

Command

LWTP

Device write

D200 to D209

OVERVIEW

(2) Transient transmission function

(a) Communication from a master station to a local station

(b) LRDP/LWTP instruction receive processing

By executing the LRDP/LWTP instruction in the sequence program of the master station, data can be read from or written to local station devices (T, C, D, W).

A Q series local station and an A/QnA series local station are different in processing at the time of accepting the LRDP/LWTP instruction.

1) Q series local station

The receive processing is performed to the LRDP/LWTP instruction in a sequence program.

CHAPTER 7 PROGRAMMING

OVERVIEW

SYSTEM

CONFIGURATION

SPECIFICATIONS

Figure 1.6 LWTP instruction receive processing (Q series local station)

2) A/QnA series local station

Figure 1.7 LWTP instruction receive processing (A/QnA series local station)

The receive processing is performed to the LRDP/LWTP instruction in the system. (The program for receiving LRDP/LWTP instruction is not required.)

1.1 Features

1 - 4

FUNCTIONS

PREPARATORY

PROCEDURES BEFORE

OPERATION

LINK DATA SEND/

RECEIVE PROCESSING

AND PROCESSING TIME

PROGRAMMING

TROUBLESHOOTING

POINT

OVERVIEW

(1) Access to another station from peripherals or intelligent function module

Access to another station is not allowed for any peripheral (GX Developer, GOT, etc.) and intelligent function module (e.g. serial communication module) connected to a Q series local station. Also, any peripheral and special function module connected to the master station cannot access any Q series local station.

Section 4.2 Transient Transmission Function

(3) RAS function

(a) Automatic return function

When a local station disconnected due to a data link error is recovered, the station automatically returns to the network and restarts data link.

(b) Loopback function (Not provided for the MELSECNET/B data link system)

A faulty part such as a disconnected cable or a faulty station is disconnected from the network to continue data link among normally operating stations.

Data of the special relay (for link) and special register (for link) of a local module are refreshed into CPU module devices. With the refreshed devices, the data link status or a faulty part can be checked. Note that the network diagnostics of GX Developer is not available for Q series local stations. Check the data link status or a faulty part in the above-mentioned way.

(d) Self-diagnostic function

The hardware or cable wiring of a local module can be checked.

(4) A program for refresh and a program for receiving LRDP/LWTP

instruction can be created easily with A/QnA to Q conversion support tool (Version 1.02 or later)

A tool to create a program for refreshing link data and a program for receiving LRDP/LWTP instruction is prepared. When using the A/QnA to Q conversion support tool, a new project can be automatically created by inputting the module mounting position or refresh destination specification of link data on the screen. The new project includes a program for refresh and a program for receiving LWTP instruction. For details on the A/QnA to Q conversion support tool, please consult your local Mitsubishi representative. To create a program used for L series by means of the A/QnA to Q conversion support tool, refer to the following:

Appendix 3 Steps to Create a Program for L Series

1 - 5

1.1 Features

POINT

Third tier

No.1

No.2

No.3

No.4

Second tier

No.1

No.2

No.3

No.4

Optical fiber cable or coaxial cable

Station that can mount local module

Master station

Local station

Local stationLocal station

Remote I/O

station

Remote I/O

station

Local stationLocal station

Master station

Local stationLocal station Local stationLocal station

Local stationLocal station

Remote I/O

station

Remote I/O

station

Local stationLocal station

No.n

(n 64)

No.n

(n 64)

SYSTEM CONFIGURATION

CHAPTER2 SYSTEM CONFIGURATION

This chapter describes the system configuration of a local module.

2.1 Overall System Configuration

(1) MELSECNET data link system

MELSECNET data link system is a system which connects the master station and slave stations (local station and remote I/O station) via an optical fiber cable or a coaxial cable.

• Up to 64 local and remote I/O stations in total can be connected to one master station for the second tier.

• Up to 64 local and remote I/O stations in total can be connected to one master station for the third tier.

OVERVIEW

SYSTEM

CONFIGURATION

SPECIFICATIONS

Figure 2.1 MELSECNET data link system

A local module cannot be the master station or a remote I/O station since it is a module dedicated to a local station.

FUNCTIONS

PREPARATORY

PROCEDURES BEFORE

OPERATION

LINK DATA SEND/

RECEIVE PROCESSING

AND PROCESSING TIME

PROGRAMMING

2.1 Overall System Configuration

TROUBLESHOOTING

2 - 1

POINT

Local station Master station

Second tier

No.1

Shielded twisted pair cable

Station that can mount local module

No.3 No.2

No.4

No.1 No.3 No.2

No.4

Third tier

Shielded twisted pair cable

Local station

Master station

Remote I/O

station

Local stationLocal station Local stationLocal station Local stationLocal station

Local stationLocal station Local stationLocal station

Local stationLocal station

Local stationLocal stationLocal stationLocal station

No.n (n 31)

SYSTEM CONFIGURATION

(2) MELSECNET/B data link system

MELSECNET/B data link system is a system which connects the master station and slave stations (local station and remote I/O station) via a shielded twisted pair cable.

• Up to 31 local and remote I/O stations in total can be connected to one master station for the second tier.

• Up to 31 local and remote I/O stations in total can be connected to one master station for the third tier.

Figure 2.2 MELSECNET/B data link system

A local module cannot be the master station or a remote I/O station since it is a module dedicated to a local station.

2 - 2

2.1 Overall System Configuration

Remark

Third tier

Station that can mount local module

Second tier

LL11

l1l1

l2l2

SYSTEM CONFIGURATION

The following shows the combination of the three-tier system other than (1) and (2) in this section. (1) When second tier is MELSECNET and third tier is MELSECNET/B

OVERVIEW

Second tier

Third tier

Figure 2.3 When second tier is MELSECNET and third tier is MELSECNET/B

Station that can mount local module

(2) When second tier is MELSECNET/B and third tier is MELSECNET

Figure 2.4 When second tier is MELSECNET/B and third tier is MELSECNET

SYSTEM

CONFIGURATION

SPECIFICATIONS

FUNCTIONS

PREPARATORY

PROCEDURES BEFORE

OPERATION

LINK DATA SEND/

RECEIVE PROCESSING

AND PROCESSING TIME

PROGRAMMING

2.1 Overall System Configuration

2 - 3

TROUBLESHOOTING

POINT

SYSTEM CONFIGURATION

2.2 Applicable Systems

This section describes applicable systems.

2.2.1 Applicable system for Q series

This section describes the applicable system for Q series.

(1) Mountable modules and number of mountable modules

(a) Mountable modules

High Performance model CPU and Universal model QCPU with a serial number (first five digits) of "13102" or later (excluding the QnUDPVCPU)

QA1S5 B, QA1S6 B, or "QA6 B + A-A1S module conversion adapter"

(b) Number of mountable modules

QCPU User’s Manual (Hardware Design, Maintenance and Inspection)

• Depending on the combination with other modules or the number of mounted modules, power supply capacity may be insufficient. Pay attention to the power supply capacity before mounting modules, and if the power supply capacity is insufficient, change the combination of the modules.

• Mount a module within the number of I/O points for the CPU module. If the number of slots is within the available range, the module can be mounted on any slot.

The local module cannot be used in a MELSECNET/H remote I/O station. Mount the module with a CPU module of the master station.

(2) Support of a multiple CPU system

When the local module is used in the multiple CPU system, refer to the following first:

"PRECAUTIONS FOR USE OF AnS/A SERIES MODULE" in the QCPU User’s

Manual (Multiple CPU System)

For AnS series compatible I/O modules and special function modules, set up the identical CPU module as the control CPU.

2 - 4

(3) Supported software packages

Using a local module requires GX Developer or GX Works2. For the version of software package compatible with the CPU module used, refer to the following:

• With the single CPU system

QCPU User’s Manual (Hardware Design, Maintenance and Inspection)

• With the multiple CPU system

QCPU User’s Manual (Multiple CPU System)

2.2 Applicable Systems

2.2.1 Applicable system for Q series

POINT

SYSTEM CONFIGURATION

2.2.2 Applicable system for L series

This section describes the applicable system for L series.

(1) Mountable modules and number of mountable modules

(a) Mountable modules

LCPU with a serial number (first five digits) of "16112" or later LA1S extension base unit

(b) Number of mountable modules

MELSEC-L LA1S Extension Base Unit User’s Manual

• Mount a module within the number of I/O points for the CPU module. If the number of slots is within the available range, the module can be mounted on any slot.

(2) Supported software package

For the supported version of software package, refer to the following:

MELSEC-L LA1S Extension Base Module User’s Manual

OVERVIEW

SYSTEM

CONFIGURATION

SPECIFICATIONS

FUNCTIONS

2.2 Applicable Systems

2.2.2 Applicable system for L series

2 - 5

PREPARATORY

PROCEDURES BEFORE

OPERATION

LINK DATA SEND/

RECEIVE PROCESSING

AND PROCESSING TIME

PROGRAMMING

TROUBLESHOOTING

SPECIFICATIONS

CHAPTER3 SPECIFICATIONS

This chapter describes performance specifications and function list of a local module. For general specifications, refer to the following manual.

User's manual for the CPU module used (Hardware Design, Maintenance and

Inspection)

3.1 Performance Specifications

This section describes the performance specifications of the MELSECNET or MELSECNET/B data link system and the local module.

(1) Performance specifications of MELSECNET data link system and

A1SJ71AP23Q

Table 3.1 Performance specifications of MELSECNET data link system and A1SJ71AP23Q

Specifications

Item

MELSECNET mode MELSECNET II mode

Input (X) Up to the maximum number of I/O points for the CPU module used in the master station is

Maximum applicable

link points per station

Maximum link points

in a system

Maximum link points

per station

Communication speed 1.25Mbps

Communication method Half duplex bit serial method

Synchronization method Frame synchronization method

Transmission path Duplex loop

Overall cable distance Up to 10km (Station-to-station 1km)

Number of connected stations Up to 65 (Master station: 1, The total number of local stations and remote I/O stations: 64)

Modulation method CMI method

Transmission format Conforming to HDLC (Frame format)

Error control system

RAS function

Connector

Applicable cable

Number of I/O occupied points 32 points (Intelli: 32 points)

Internal current consumption (5VDC) 0.33A

Weight 0.30kg

Output (Y)

Link relay (B) 1024 points (128 byte) 4096 points (512 byte)

Link register

(W)

Master station

Local station

Remote I/O

station

applicable.

(The total number of link points for slave station is equal to the number of link using points for the

master station)

1024 points (2048 byte) 4096 points (8192 byte)

1024 byte

512 byte

Number of I/O points: 512

points

Retries due to CRC (generating polynomial X

•Loopback function due to error detection and cable break

•Diagnostic function including link line check of host station etc.

2-core optical connector plug (User prepared

Optical fiber cable (User prepared

MELSECNET data link system

MELSECNET II composite

1024 byte (First half of link parameters)

1024 byte (Latter half of link parameters)

512 byte

+ X

+ X5 +1) and time out

)

Number of I/O points: 512

points

mode

3 - 1

* 1 Connecting an optical fiber cable with a connector requires professional skills and special tools.

Also, a connector dedicated to an optical fiber cable is required. For purchase, contact your local Mitsubishi Electric System Service or representative.

3.1 Performance Specifications

SPECIFICATIONS

(2) Performance specifications of MELSECNET data link system and

A1SJ71AR23Q

Table 3.2 Performance specifications of MELSECNET data link system and A1SJ71AR23Q

Specifications

Item

MELSECNET mode MELSECNET II mode

Input (X) Up to the maximum number of I/O points for the CPU module used in the master station is

Maximum applicable

link points per station

Maximum link points

in a system

Maximum link points

per station

Communication speed 1.25Mbps

Communication method Half duplex bit serial method

Synchronization method Frame synchronization method

Transmission path Duplex loop

Overall cable distance Up to 10km (Station-to-station 500m)

Number of connected stations Up to 65 (Master station: 1, The total number of local stations and remote I/O stations: 64)

Modulation method CMI method

Transmission format Conforming to HDLC (Frame format)

Error control system

RAS function

Connector

Applicable cable Cables equivalent to 3C-2V or 5C-2V (User prepared)

Number of I/O occupied points 32 points (Intelli: 32 points)

Internal current consumption (5VDC) 0.80A

Weight 0.33kg

Output (Y)

Link relay (B) 1024 points (128 byte) 4096 points (512 byte)

Link register

(W)

Master station

Local station

Remote I/O

station

applicable.

(The total number of link points for slave station is equal to the number of link using points for the

master station)

1024 points (2048 byte) 4096 points (8192 byte)

1024 byte

512 byte

Number of I/O points: 512

points

Retries due to CRC (generating polynomial X

•Loopback function due to error detection and cable disconnection

•Diagnostic function including link line check of host station etc.

Connector plug for 3C-2V (User prepared):

•BNC-P-3-NiCAu-CF (DDK Ltd.)

Connector plug for 5C-2V (User prepared):

•BNC-P-5-NiCAu-CF (DDK Ltd.)

•BNC-P-5DV SA(41) (HIROSE ELECTRIC CO., LTD.)

MELSECNET data link system

MELSECNET II composite

1024 byte (First half of link parameters)

1024 byte (Latter half of link parameters)

512 byte

+ X

+ X5 +1) and time out

Number of I/O points: 512

points

mode

OVERVIEW

SYSTEM

CONFIGURATION

SPECIFICATIONS

FUNCTIONS

PREPARATORY

PROCEDURES BEFORE

OPERATION

3.1 Performance Specifications

LINK DATA SEND/

RECEIVE PROCESSING

AND PROCESSING TIME

PROGRAMMING

TROUBLESHOOTING

3 - 2

SPECIFICATIONS

(3) Performance specifications of MELSECNET/B data link system and

A1SJ71AT23BQ

Table 3.3 Performance specifications of MELSECNET/B data link system and A1SJ71AT23BQ

Specifications

Item

MELSECNET mode MELSECNET II mode

Input (X) Up to the maximum number of I/O points for the CPU module used in the master station is

Maximum applicable

link points per station

Maximum link points

in a system

Maximum link points

per station

Communication speed 125kbps/250kbps/500kbps/1Mbps

Communication method Half duplex bit serial method

Synchronization method Frame synchronization method

Transmission path Bus method

Overall cable distance

Number of connected stations Up to 32 (Master station: 1, The total number of local stations and remote I/O stations: 31)

Modulation method NRZI method

Transmission format Conforming to HDLC (Frame format)

Error control system

RAS function Diagnostic function including link line check of host station etc.

Connector Terminal block

Applicable cable Shielded twisted pair cable (User prepared)

Number of I/O occupied points 32 points (Intelli: 32 points)

Internal current consumption (5VDC) 0.66A

Weight 0.22kg

Output (Y)

Link relay (B) 1024 points (128 byte) 4096 points (512 byte)

Link register

(W)

Master station

Local station

Remote I/O

station

applicable.

(The total number of link points for slave station is equal to the number of link using points for the

master station)

1024 points (2048 byte) 4096 points (8192 byte)

1024 byte

512 byte

Number of I/O points: 512

points

Changed due to communication speed

(125kbps: 1200m, 250kbps: 600m, 500kbps: 400m, 1Mbps: 200m)

Retries due to CRC (generating polynomial X

MELSECNET/B data link system

MELSECNET II composite

1024 byte (First half of link parameters)

1024 byte (Latter half of link parameters)

512 byte

+ X

+ X5 + 1) and time out

Number of I/O points: 512

points

mode

3 - 3

3.1 Performance Specifications

Remark

SPECIFICATIONS

Overall cable distance (1) MELSECNET data link system

The overall cable distance refers to a distance from OUT of the master station to IN of the master station via a slave station.

OVERVIEW

MELSECNET

Figure 3.1 Overall cable distance of MELSECNET

Overall cable distance of MELSECNET

(2) MELSECNET/B data link system

The overall cable distance refers to a distance between stations at both ends. The overall cable distance of the MELSECNET/B data link system is determined depending on communication speed. The communication speed is set by the communication speed setting switch of each link module.

Section 5.3 Part Names and Settings

Table 3.4 Communication speed and overall cable distance

Communication speed Overall cable distance

125kbps 1200m

250kbps 600m

500kbps 400m

1Mbps 200m

SYSTEM

CONFIGURATION

SPECIFICATIONS

FUNCTIONS

Overall cable distance of MELSECNET/B

L3ML1L2

Figure 3.2 Overall cable distance of MELSECNET/B

3.1 Performance Specifications

PREPARATORY

PROCEDURES BEFORE

OPERATION

LINK DATA SEND/

RECEIVE PROCESSING

AND PROCESSING TIME

PROGRAMMING

TROUBLESHOOTING

3 - 4

Remark

SPECIFICATIONS

3.2 Cable Specifications

This section describes the specifications of a cable used in the MELSECNET or MELSECNET/B data link system.

3.2.1 Optical fiber cable

The following shows the specifications of an optical fiber cable used in the MELSECNET data link system. For details of the optical fiber cable specifications, refer to the catalogs of optical fiber cables. Connecting an optical fiber cable with a connector requires professional skills and special tools. Also, a connector dedicated to optical fiber cables is required. Optical fiber cables with connectors can be purchased in Mitsubishi Electric System Service or representative. In addition, they can provide installation service. Contact your local Mitsubishi Electric System Service or representative.

Item SI (Multicomponent glass) H-PCF (Plastic clad)

Station-to-station distance 1km 1km

Transmission loss 12dB/km 6dB/km

Core diameter

Clad diameter

Primary film

Applicable connector Connectors equivalent to F06/F08 (Conforming to JIS C 5975/5977)

Table 3.5 Specifications of optical fiber cable

200 m 200 m

220 m 250 m

250 m

(1) Types of optical fiber cables are as follows:

A type: Cable for connecting the inside of a control panel B type: Cable for connecting control panels inside C type: Cable for connecting control panels outside D type: Reinforced cable for connecting control panels outside Since there are cables for specific use including move and heat resistance, contact Mitsubishi Service or representative.

3 - 5

3.2 Cable Specifications

3.2.1 Optical fiber cable

Internal conductor

Insulator External conductor

External sheath

SPECIFICATIONS

3.2.2 Coaxial cable

The following shows the specifications of a coaxial cable used in the MELSECNET data link system. As for a coaxial cable, use "3C-2V" or "5C-2V" (conforming to JIS C 3501) of a highfrequency coaxial cable.

(1) Specifications of coaxial cable

The following shows the specifications of a coaxial cable. As for a coaxial cable, choose the one which meets the operating ambient

temperature (0 to 55 ) described in the general specification.

Table 3.6 Specifications of coaxial cable

Item 3C-2V 5C-2V

Structure

Cable diameter 5.4mm 7.4mm

Allowable bend radius 22mm or more 30mm or more

Diameter of internal

conductor

Diameter of insulator 3.1mm (Polyethylene) 4.9mm (Polyethylene)

Diameter of external

conductor

Applicable connector

plug

0.5mm (Annealed copper wire) 0.8mm (Annealed copper wire)

3.8mm (Single annealed copper wire mesh) 5.6mm (Single annealed copper wire mesh)

Connector plug for 3C-2V:

•BNC-P-3-NiCAu-CF (DDK Ltd.)

Connector plug for 5C-2V:

•BNC-P-5-NiCAu-CF (DDK Ltd.)

•BNC-P-5DV SA(41) (HIROSE ELECTRIC CO., LTD.)

OVERVIEW

SYSTEM

CONFIGURATION

SPECIFICATIONS

FUNCTIONS

3.2 Cable Specifications

3.2.2 Coaxial cable

3 - 6

PREPARATORY

PROCEDURES BEFORE

OPERATION

LINK DATA SEND/

RECEIVE PROCESSING

AND PROCESSING TIME

PROGRAMMING

TROUBLESHOOTING

Nut Washer Gasket

Clamp Contact

Plug shell

Components of BCN connector

Measures for removing external sheath

Cable A

3C-2V 15mm

5C-2V 10mm

Clamp

Gasket

Washer

Nut

Internal conductor

Insulator

Clamp and external conductor

Cable B C

3C-2V 3mm 6mm

5C-2V 5mm 7mm

SPECIFICATIONS

(2) Connection of connector for coaxial cable

The following shows how to connect a BCN connector (connector plug for coaxial cable) and a cable.

(a) Components of BNC connector and coaxial cable

Figure 3.3 Components of BNC connector and coaxial cable

(b) How to connect BNC connector and coaxial cable

1) Remove external sheath of a coaxial cable as shown below. Be careful not to damage an external conductor.

Components of coaxial cable

External conductor

External sheath

Insulator

Internal conducto

2) Put a nut, washer, gasket, and clamp through the coaxial cable and unravel the external conductor.

3) Cut the external conductor, insulator, and internal conductor in the following dimensions. As for the external conductor, cut it in the same dimensions as taper part of the clamp, and smooth it down to the clamp.

3 - 7

3.2 Cable Specifications

3.2.2 Coaxial cable

POINT

Soldered

SPECIFICATIONS

4) Solder a contact to the internal conductor.

5) Insert a contact assembly in 4) to a plug shell and screw a nut into the plug

shell.

OVERVIEW

SYSTEM

CONFIGURATION

(1) When soldering an internal conductor and a contact, pay attention to the

following points.

• Do not swell up the soldered part.

• Properly solder a contact and an insulator of the cable without making space between them or soldering them too tight.

• Perform soldering immediately so as not to modify the insulator.

(2) Before removing/mounting the coaxial cable connector, be sure to touch a

grounded metal object to discharge the static electricity from the human body. Not doing so may cause failure of the module.

SPECIFICATIONS

FUNCTIONS

PREPARATORY

PROCEDURES BEFORE

OPERATION

LINK DATA SEND/

RECEIVE PROCESSING

AND PROCESSING TIME

3.2 Cable Specifications

3.2.2 Coaxial cable

PROGRAMMING

TROUBLESHOOTING

3 - 8

Blue

White

SPECIFICATIONS

3.2.3 Shielded twisted pair cable

The following shows the specifications of a shielded twisted pair cable used in the MELSECNET/B data link system.

Table 3.7 Specifications of shielded twisted pair cable

Item Description

Model name

Cable Shielded twisted pair cable

Core 2-core

Conductor resistance (20 ) 39.4 /km or less

Insulation resistance (20 )

Dielectric withstand voltage V-min 1000VAC 1 minute

Capacitance (1KHz) 70nF/km or less on average

Characteristic impedance

(100KHz)

KNPEV-SB 0.5SQ 1P

10M km or more

110 10

Cross section

Maker TOA ELECTRIC INDUSTRIAL CO., LTD

3 - 9

3.2 Cable Specifications

3.2.3 Shielded twisted pair cable

POINT

SPECIFICATIONS

3.3 Function List

This section describes a function list of a local module.

Function Description

1: n communication

(B/W

Cyclic transmission

Transient

transmission

RAS function

communication)

1:1 communication

(X/Y

communication)

LRDP/LWTP

instruction

Automatic return

Loopback

Error detection

Self-diagnostics Checks the hardware or cable wiring of a local module. Section 5.5

Table 3.8 Function list

Data is communicated between the master station and a local station and between

local stations.

Note that Q series local stations refresh link data using the sequence program.

The 1:1 data communication is performed between the master station and a local

station.

Note that Q series local stations refresh link data using the sequence program.

By executing the LRDP/LWTP instruction in the sequence program of the master

station, data can be read from or written to local station devices (T, C, D, W).

Note that Q series local stations handle the reception of the LRDP/LWTP

instruction with the sequence program.

When a local station disconnected due to a data link error is recovered, the station

automatically returns to the network and restarts data link.

Disconnects a faulty part such as a disconnected cable or a faulty station from the

network to continue data link among normally operating stations. (Not provided for

the MELSECNET/B data link system)

Refreshes a special relay (for link) and special register (for link) of a local module

to a device of the CPU.

The data link status or faulty part can be checked by using the refreshed device.

Note that the network diagnostics of GX Developer is not available for Q series

local stations. Check the data link status or a faulty part in the above-mentioned

way.

Reference

section

Section

4.1.1

Section

4.1.2

Section 4.2

Section

4.3.1

Section

4.3.2

Section

4.3.3

OVERVIEW

SYSTEM

CONFIGURATION

SPECIFICATIONS

FUNCTIONS

(1) Access to another station from peripheral or intelligent function module

Section 4.2 Transient Transmission Function

PREPARATORY

PROCEDURES BEFORE

OPERATION

LINK DATA SEND/

RECEIVE PROCESSING

AND PROCESSING TIME

PROGRAMMING

3.3 Function List

TROUBLESHOOTING

3 - 10

SPECIFICATIONS

3.4 I/O Signal for Programmable Controller CPU

3.4.1 List of I/O signal

The following shows the list of I/O signal of a local module to the programmable controller CPU. The I/O signal is assigned, assuming that start I/O number of a local module is "0000". Replace it with the I/O signal of a slot where the local module is mounted. Note that a local module cannot be mounted to the main base unit. The device X is an input signal from a local module to the programmable controller CPU, and the device Y is an output signal from the programmable controller to a local module.

Table 3.9 List of I/O signal

Signal direction

Local module Programmable controller CPU

Device

No.

Link status

OFF: Online

ON: Offline, station-to-station test, or self-loopback test

B/W initial value setting status

OFF: B/W initial value setting completed

ON: B/W initial value setting in execution

X3 Y3

X4 Y4

Use prohibited

X5 Y5

X6 Y6

Refresh ready status

OFF: refresh not requested

ON: Refresh requested

X9 Y9

XA YA

XB YB

Use prohibited

XC YC

XD YD

XE YE

XF YF

Signal name

Programmable controller CPU Local module

Device

No.

Use prohibited

Signal direction

Signal name

3 - 11

3.4 I/O Signal for Programmable Controller CPU

3.4.1 List of I/O signal

POINT

SPECIFICATIONS

Table 3.9 List of I/O signal(Continued)

Signal direction

Local module Programmable controller CPU

Device

No.

X10

X11 Y11

X12 Y12

X13 Y13

X14 Y14

X15 Y15

X16 Y16

X17 Y17

X18 Y18

X19 Y19

X1A Y1A

X1B Y1B

X1C Y1C

X1D Y1D

X1E Y1E

X1F Y1F

Use prohibited

Signal name

Device

Do not turn ON "use prohibited" signals among I/O signals for the programmable controller CPU. Doing so may cause malfunction of the programmable controller system.

Signal direction

Programmable controller CPU Local module

No.

CPU operating status

Y10

OFF: STOP status, ERROR status

ON: RUN status

Refresh in execution

OFF: Refresh not executed

ON: Refresh in execution

Use prohibited

Refresh request

OFF: Refresh not requested

ON: Refresh requested

Use prohibited

Signal name

OVERVIEW

SYSTEM

CONFIGURATION

SPECIFICATIONS

FUNCTIONS

3.4 I/O Signal for Programmable Controller CPU

3.4.1 List of I/O signal

3 - 12

PREPARATORY

PROCEDURES BEFORE

OPERATION

LINK DATA SEND/

RECEIVE PROCESSING

AND PROCESSING TIME

PROGRAMMING

TROUBLESHOOTING

Link scan

Refresh in execution (DY11)

Refresh ready status (X7)

Device memory storage area

Local moduleLocal module

Link data storage area

CPU moduleCPU module

Sequence scan

Power-on

CPU operating status (DY10)

B/W initial value setting status (X1)

Refresh request (DY16)

Sending/receiving data

At power-on, sending/receiving data to/from other station is started after setting the B/W initial value.

0 END 0 END0END

(Buffer memory address: 100H to 13FFH)

Program for refresh

0END

SPECIFICATIONS

3.4.2 Details of I/O signal

The following shows details of I/O signal of a local module.

(1) Link status (X0)

The link status is turned ON when the host station is offline, station-to-station test, or self-loopback test. The link status is turned OFF when setting the host station online and turning power supply ON from OFF or resetting the CPU module.

(2) B/W initial value setting status (X1), Refresh ready status (X7), CPU

operating status (Y10), Refresh in execution (Y11), and Refresh request (Y16)

Operations of link refresh are shown below. For the programming, refer to the following.

CHAPTER 7 PROGRAMMING

3 - 13

3.4 I/O Signal for Programmable Controller CPU

3.4.2 Details of I/O signal

Figure 3.4 Operation of link refresh

(a) Turning power supply ON from OFF or resetting the CPU module

1) A local module turns ON the B/W initial value setting status (X1).

2) The B/W device of the CPU module is written to the B/W device of the local module in a sequence program.

3) When CPU operating status (DY10) and Refresh request (DY16) are turned ON in a sequence program after writing the initial value to the B/W device of the local module, a Q series local station starts data communication with other stations.

POINT

SPECIFICATIONS

(1) After turning power supply ON from OFF or resetting the CPU module, be

sure to transfer the initial value of the B/W device to a local module before a Q series local station communicates data with other stations.

(2) When turning power supply ON from OFF or resetting the CPU module at the

STOP status of the CPU module, data communication with other stations is not started. The master station treats a local station as a faulty station (relevant bit in D9228 to D9231 is turned ON). When executing a program for refresh (Y10=ON) at the RUN status of the CPU module, data communication with other stations is started.

(b) Link refresh of link data

1) A local module turns ON Refresh ready status (X7) when a link scan is

completed and refresh is ready. During a sequence scan when Refresh ready status (X7) is turned ON, a Q series local station stops data communication with other stations.

2) In a sequence program, turn ON Refresh in execution (DY11) and refresh

devices for the local module and the CPU module using the following area.

• Presence or absence of refresh information table (Buffer memory

• Refresh information table (Buffer memory address: 2

• Link data storage area (Buffer memory address: 100

3) After refresh is completed, turn OFF Refresh in execution (DY11) and Refresh

request (DY16) in the sequence program.

address: 0

H, 1H)

H to 27H)

H to 13FFH)

OVERVIEW

SYSTEM

CONFIGURATION

SPECIFICATIONS

FUNCTIONS

4) When the refresh request (DY16) is turned ON by sequence programs, the

refresh ready status (X7) is turned OFF. After sequence scans where the refresh ready status (X7) is turned OFF, Q series local stations restart data sending/receiving from other stations.

Read/write the buffer memory from/to the sequence scan where Refresh ready status (X7) is ON. When the sequence scan is read/written to/from the sequence scan where Refresh ready status (X7) is OFF, the sequence scan time for the host station may be prolonged, or the CPU module may stop due to SP.UNIT DOWN.

PREPARATORY

PROCEDURES BEFORE

OPERATION

LINK DATA SEND/

RECEIVE PROCESSING

AND PROCESSING TIME

PROGRAMMING

3.4 I/O Signal for Programmable Controller CPU

3.4.2 Details of I/O signal

TROUBLESHOOTING

3 - 14

SPECIFICATIONS

3.5 Buffer Memory List

The following shows a buffer memory list of a local module.

Table 3.10 Buffer memory list

Address

Hexadecimal Decimal

0H to 1H 0 to 1 Presence or absence of refresh information table

2H 2

3H 3 Points (in units of words)

4H 4

5H 5 Points (in units of words)

6H 6

7H 7 Points (in units of words)

8H 8

9H 9 Points (in units of words)

AH 10

BH 11 Points (in units of words)

CH 12

DH 13 Points (in units of words)

EH 14

FH 15 Points (in units of words)

10H 16 System area (Use prohibited) - - -

11H 17

12H 18 Points (in units of words)

13H 19 System area (Use prohibited) - - -

14H 20

15H 21 Points (in units of words)

16H 22

17H 23 Points (in units of words)

18H 24

19H 25 Points (in units of words)

1AH 26

1BH 27 Points (in units of words)

1CH 28

1DH 29 Points (in units of words)

1EH 30

1FH 31 Points (in units of words)

20H 32

21H 33 Points (in units of words)

22H 34 Send range of

23H 35 Points (in units of words)

24H 36 Send range of

25H 37 Points (in units of words)

26H 38 Send range of

27H 39 Points (in units of words)

Refresh information

table (First half of link

parameters)

Refresh information

table (Latter half of

link parameters)

Refresh information

table (Send range of

master station for the

second tier)

Name

Host station send

range of W

Other station send

range (1) of W

Other station send

range (2) of W

Host station send

range of B

Other station send

range (1) of B

Other station send

range (2) of B

Host station send

range of Y

Host station receive

range of X

Host station send

range of W

Other station send

range (1) of W

Other station send

range (2) of W

Host station send

range of B

Other station send

range (1) of B

Other station send

range (2) of B

Send range of

master station for

second tier (first

half) of W

master station for

second tier (first

half) of B

master station for

second tier (latter

half) of W

master station for

second tier (latter

half) of B

Start number (0 to FFF)

Start number (0 to FF0)

Start number (0 to 7F0)

Start number (0 to FFF)

Start number (0 to FF0)

Start number (0 to FFF)

Start number (0 to FF0)

Start number (0 to FFF)

Start number (0 to FF0)

Initial

value

Readable/

Writable*

Reference

section

Section

3.6.2

Section

3.6.3

Section

3.6.3

Section

3.6.3

3 - 15

3.5 Buffer Memory List

SPECIFICATIONS

Table 3.10 Buffer memory list(Continued)

Address

Hexadecimal Decimal

28H to ABH 40 to 171 System area (Use prohibited) - - -

ACH 172 LRDP instruction receive request 0 R

ADH 173 System area (Use prohibited) - - -

AEH 174 LWTP instruction receive request 0 R

AFH 175 System area (Use prohibited) - - -

B0H to D7H 176 to 215 LRDP instruction work area

B8H to FFH 216 to 255 LWTP instruction work area

100H to 103H 256 to 259

104H to 10FH 260 to 271 System area (Use prohibited) - - -

110 H to 147H 272 to 327 Special register (for link) (D9200 to D9255) 0 R

148H to 14FH 328 to 335 System area (Use prohibited) - - -

150H to 1CFH 336 to 463 Input (X0 to X7FF)

1D0H to 24FH 464 to 591 Output (Y0 to Y7FF)

250H to 34FH 592 to 847 Link relay (B0 to BFFF)

350H to 3FFH 848 to 1023 System area (Use prohibited) - - -

400H to 13FFH 1024 to 5119 Link register (W0 to WFFF) 0 R/W

Link data storage

area

* 1 Indicates whether reading/writing can be performed with a sequence program.

R: Readable, W: Writable

Name

Special relay (for link) (M9200 to M9255) 0 R

Initial

value

Readable/

Writable*

0R/W

Reference

section

Section

3.6.10

3.6.4

3.6.5

3.6.4

3.6.5

3.6.6

3.6.7

3.6.8

3.6.9

OVERVIEW

SYSTEM

CONFIGURATION

SPECIFICATIONS

FUNCTIONS

3.5 Buffer Memory List

PREPARATORY

PROCEDURES BEFORE

OPERATION

LINK DATA SEND/

RECEIVE PROCESSING

AND PROCESSING TIME

PROGRAMMING

TROUBLESHOOTING

3 - 16

SPECIFICATIONS

3.6 Details of Buffer Memory

This section describes details of a buffer memory of a local module.

3.6.1 Precautions

(1) Reading/writing a buffer memory

(2) Buffer memory batch monitor/test of GX Developer

Buffer memory batch monitor/test of GX Developer cannot be used. When executing buffer memory batch monitor/test of GX Developer, the sequence scan time for the host station may be prolonged, or the CPU module may stop due to SP.UNIT DOWN. In addition, when the host station is offline, station-to-station test or self-loopback test, a communication error occurs to GX Developer. When monitoring/testing link data storage area of a buffer memory, monitor/test the device of the refresh target CPU module. Devices of the CPU module can be checked by the device batch monitor/test of GX Developer.

3 - 17

3.6 Details of Buffer Memory

3.6.1 Precautions

0: No setting, 1: With setting Host station send range of W Other station send range (1) of W Other station send range (2) of W Host station send range of B Other station send range (1) of B Other station send range (2) of B Host station send range of Y Host station receive range of X Host station send range of W Other station send range (1) of W Other station send range (2) of W Host station send range of B Other station send range (1) of B Other station send range (2) of B (For system) Special relay (for link), Special register (for link)

First half of link parameters

Latter half of link parameters

Address: 0

b15 b0b8 b7to to

0: No setting, 1: With setting Send range of master station for second tier (first half) of B/W

Address: 1

b15 b0b2 b1to

Send range of master station for second tier (latter half) of B/W

(For system)

SPECIFICATIONS

3.6.2 Presence or absence of refresh information table

Validity/invalidity of each table of refresh information table (buffer memory address: 2H to

H) is stored.

27 The refresh information table is created at the time of receiving link parameters from the master station.

OVERVIEW

SYSTEM

CONFIGURATION

SPECIFICATIONS

Figure 3.5 Presence or absence of refresh information table

3.6.2 Presence or absence of refresh information table

3.6 Details of Buffer Memory

3 - 18

FUNCTIONS

PREPARATORY

PROCEDURES BEFORE

OPERATION

LINK DATA SEND/

RECEIVE PROCESSING

AND PROCESSING TIME

PROGRAMMING

TROUBLESHOOTING

SPECIFICATIONS

3.6.3 Refresh information table

The refresh information table is stored. Refresh devices of the local module and CPU module using the refresh information table in a sequence program.

CHAPTER 7 PROGRAMMING

Local module CPU module

Link data storage area

of buffer memory

103

13BH

147H 150

1CFH

1D0

24FH

250

34FH

400

13FFH

M9240 to M9255

D9243 to D9255

Host station receive range Host station receive range

X7FF

Host station send range Host station send range

Y7FF

Other station send range (1)

(First half of link parameters)

Host station send range

(First half of link parameters)

Other station send range (2)

(First half of link parameters)

Other station send range (1)

(Latter half of link parameters)

Host station send range

(Latter half of link parameters)

Other station send range (2)

(Latter half of link parameters)

Other station send range (1)

(First half of link parameters)

Host station send range

(First half of link parameters)

Other station send range (2)

(First half of link parameters)

Other station send range (1)

(Latter half of link parameters)

Host station send range

(Latter half of link parameters)

Other station send range (2)

(Latter half of link parameters)

BFFF

WFFF

Device memory

storage area

SM1240 to SM1255

SD1243 to SD1255

Other station send range (1) (First half of link parameters)

Host station send range

(First half of link parameters)

Other station send range (2) (First half of link parameters)

Other station send range (1)

(Latter half of link parameters)

Host station send range

(Latter half of link parameters)

Other station send range (2)

(Latter half of link parameters)

Other station send range (1) (First half of link parameters)

Host station send range

(First half of link parameters)

Other station send range (2) (First half of link parameters)

Other station send range (1)

(Latter half of link parameters)

Host station send range

(Latter half of link parameters)

Other station send range (2)

(Latter half of link parameters)

X1FFF

Y1FFF

B1FFF

W1FFF

3 - 19

Figure 3.6 Refresh image

3.6 Details of Buffer Memory

3.6.3 Refresh information table

100 200 300 380

(Empty)

FFF

ML1 L3

Readable range

Writable range

B/W 0

Other station send range (1) Start number: 0000

Number of points: 0100

Host station send range Start number: 0100

Number of points: 0100

Other station send range (2) Start number: 0200

Number of points: 0180

100 200 300 380 FFF

ML1 L3

B/W 0

Other station send range (1) Start number: 0100

Number of points: 0280

Host station send range Start number: 0000

Number of points: 0100

100 200 280 380 FFF

ML1L3

B/W 0

Other station send range (1) Start number: 0000

Number of points: 0280

Host station send range Start number: 0280

Number of points: 0100

Link parameter assignment example (1)

Link parameter assignment example (2)

Link parameter assignment example (3)

(Empty)

SPECIFICATIONS

(1) Each station send range of B/W

When a local module is a local station in the second tier (L1 station), each station send range of B/W is stored as follows:

OVERVIEW

SYSTEM

CONFIGURATION

SPECIFICATIONS

Figure 3.7 Each station send range of B/W for refresh information table

FUNCTIONS

PREPARATORY

PROCEDURES BEFORE

OPERATION

LINK DATA SEND/

RECEIVE PROCESSING

AND PROCESSING TIME

PROGRAMMING

3.6 Details of Buffer Memory

3.6.3 Refresh information table

TROUBLESHOOTING

3 - 20

100 200 300 380

(Empty)

FFF

L1L3

Second

tier

ML1 L3

Readable range

Writable range

B/W 0

Other station

send range (1)

Host station

send range

Other station

send range (2)

Link parameters of second tier

SPECIFICATIONS

(2) Storage example of refresh information table

The following shows the storage example of refresh information table for the case where link parameters are set as shown below and a local module is a local station in the second tier (L1 station).

Figure 3.8 Link parameter setting

Table 3.11 Storage example of refresh information table

Address

Hexadecimal Decimal

2H 2

3H 3 Points (in units of words) 0100H

4H 4

5H 5 Points (in units of words) 0100H

6H 6

7H 7 Points (in units of words) 0180H

8H 8

9H 9 Points (in units of words) 0100H

AH 10

BH 11 Points (in units of words) 0100H

CH 12

DH 13 Points (in units of words) 0180H

Refresh information table

(First half of link

parameters)

Name Stored value

Host station send

range of W

Other station send

range (1) of W

Other station send

range (2) of W

Host station send

range of B

Other station send

range (1) of B

Other station send

range (2) of B

Start number (0 to FFF) 0100

Start number (0 to FFF) 0000

Start number (0 to FFF) 0200

Start number (0 to FF0) 0100

Start number (0 to FF0) 0000

Start number (0 to FF0) 0200

3 - 21

3.6 Details of Buffer Memory

3.6.3 Refresh information table

0 END 0 END

LRDP

0 END 0 END

100

0 END 0 END 0 END

0 END 0 END

100

0 END

Read command

Read completion device

Read data storage device

CPU moduleCPU module

Sequence scan

Link moduleLink module

Refresh ready status (X7)

Sequence scan

Read data (B4

H or later)

Local moduleLocal module

LRDP instruction receive request (AC

)

5 (Processing completed)

(1 scan)

CPU moduleCPU module

Link scan

Read data storage device

4 (Processing requested)

SPECIFICATIONS

3.6.4 LRDP instruction receive request/receive result/work area

When a device read (LRDP instruction) is requested to a Q series local station from the master station, execute receive processing to the LRDP instruction in a sequence program.

CHAPTER 7 PROGRAMMING The following shows operations of a local module at the time of receiving the LRDP instruction.

OVERVIEW

SYSTEM

CONFIGURATION

SPECIFICATIONS

Figure 3.9 Operation of local module at the time of receiving LRDP instruction

FUNCTIONS

PREPARATORY

PROCEDURES BEFORE

OPERATION

LINK DATA SEND/

RECEIVE PROCESSING

AND PROCESSING TIME

PROGRAMMING

3.6 Details of Buffer Memory

3.6.4 LRDP instruction receive request/receive result/work area

TROUBLESHOOTING

3 - 22

SPECIFICATIONS

(1) LRDP instruction receive request (Buffer memory address: ACH)

The receive request for the LRDP instruction is stored. 4: Processing requested (System sets it when LRDP instruction is accepted.) 5: Processing completed (User has to set it after the read data is stored.) Other than the above: No request

(2) LRDP instruction work area (Buffer memory address: B0H to D7H)

When the LRDP instruction receive request (buffer memory address: ACH) is "4", the requested content of the LRDP instruction is stored into the following area.

1) Read the read data (buffer memory address: B4 the devices of the CPU module using the following area in a sequence program.

2) After reading data, set "5" to the LRDP instruction receive request (buffer memory address: AC

H).

3) Send the data which is stored in the read data (buffer memory address: B4

H) to the master station.

Table 3.12 LRDP instruction work area

Address

Hexadecimal

(Decimal)

B0H(176)

B1H(177)

B2H(178) System area (Use prohibited) -

B3H(179) Read data length

B4H to D7H

(180 to 215)

Read start device name

Read start device No.

Read data Stores the data to be read.

Item Description

Stores a start device name (device code) of the CPU module.

544E

H: T

434E

H: C

4420

H: D

5720

H: W

Stores a start device No. of the CPU module.

Stores the number of data to be read.

1 to 32 (Word)

H to D7H) of a local module to

H to

3 - 23

* 1 Stored value when start device is D100

Table 3.13 Stored value when start device is D100

Address

Hexadecimal

(Decimal)

B0H(176) Read start device name (D) 4420H

B1H(177) Read start device No. (100) 0064H

3.6 Details of Buffer Memory

3.6.4 LRDP instruction receive request/receive result/work area

Item (description) Stored value

0 END 0 END

LWTP

0 END 0 END

100

0 END 0 END 0 END

0 END 0 END

100

0 END

100

Write command

Write completion device

Write data storage device

CPU moduleCPU module

Sequence scan

Link moduleLink module

Refresh ready status (X7)

Sequence scan

Write data (DC

H or later)

Local moduleLocal module

LWTP instruction receive request (AE

5 (Processing completed)

(1scan)

CPU moduleCPU module

Link scan

Write data storage device

4 (Processing requested)

SPECIFICATIONS

3.6.5 LWTP instruction receive request/receive result/work area

When a device write (LWTP instruction) is requested to a Q series local station from the master station, execute receive processing to the LWTP instruction in a sequence program.

CHAPTER 7 PROGRAMMING The following shows operations of a local module at the time of receiving the LWTP instruction.

OVERVIEW

SYSTEM

CONFIGURATION

SPECIFICATIONS

Figure 3.10 Operation of local module at the time of receiving LWTP instruction

FUNCTIONS

PREPARATORY

PROCEDURES BEFORE

OPERATION

LINK DATA SEND/

RECEIVE PROCESSING

AND PROCESSING TIME

PROGRAMMING

3.6 Details of Buffer Memory

3.6.5 LWTP instruction receive request/receive result/work area

TROUBLESHOOTING

3 - 24

SPECIFICATIONS

(1) LWTP instruction receive request (Buffer memory address: AEH)

The receive request for the LWTP instruction is stored. 4: Processing requested (System sets it when LWTP instruction is accepted.) 5: Processing completed (User has to set it after the write data is stored.) Other than the above: No request

(2) LWTP instruction work area (Buffer memory address: D8H to FFH)

When the LWTP instruction receive request (buffer memory address: AEH) is "4", the requested content of the LWTP instruction is stored into the following area.)

1) Write the write data of a local module to the device of the CPU module (buffer memory address: DC program.

2) After writing data, set "5" to the LWTP instruction receive request (buffer memory address: AE

3) The processing completion is notified to the master station.

Table 3.14 LWTP instruction work area

Address

Hexadecimal

(Decimal)

D8H(216)

D9H(217)

DAH(218) System area (Use prohibited) -

DBH(219) Write data length

DCH to FFH

(220 to 255)

Write start device name

Write start device No.

Write data Stores the write data.

Item Description

Stores a start device name (device code) of the CPU module.

544E

H: T

434E

H: C

4420

H: D

5720

H: W

Stores a start device No. of the CPU module.

Stores the number of write data.

1 to 32 (Word)

H to FFH) using the following area in a sequence

H).

3 - 25

* 1 Stored value when start device is D100

Table 3.15 Stored value when start device is D100

Address

Hexadecimal

(Decimal)

D8H(216) Write start device name (D) 4420H

D9H(217) Write start device No.(100) 0064H

3.6 Details of Buffer Memory

3.6.5 LWTP instruction receive request/receive result/work area

Item (description) Stored value

Local module CPU module

Special relay (for link) (M) Special relay (SM)

SM1240 to SM1255

100

102H 103H

101H

M9240 to M9255

Local module CPU module

Special register (for link) (D)

110

147H

SD1243

SD1255

13BH D9243

D9255

Special register (SD)

SPECIFICATIONS

3.6.6 Special relay (for link) (M9200 to M9255)

Data of a special relay (for link) (M9200 to M9255) is stored. Refresh devices of the CPU module and the data in this area in a sequence program. The following shows refresh of special relay (for link) (M). For details of a special relay (for link), refer to the following.

Appendix 1 List of Special Relays (for Link)

M9200

b15 b0b8 b7to to

ddress: 100H

101 102H 103H

Figure 3.11 Special relay (for link) (M9200 to M9255)

(Empty)

M9208 M9224 M9240

OVERVIEW

SYSTEM

CONFIGURATION

SPECIFICATIONS

Figure 3.12 Refresh of special relay (for link) (M)

3.6.7 Special register (for link) (D9200 to D9255)

Data of a special register (for link) (D9200 to D9255) is stored. Refresh devices of the CPU module and the data in this area in a sequence program. The following shows refresh of special register (for link) (D). For details of a special register (for link), refer to the following.

Appendix 2 List of Special Registers (for Link)

Figure 3.13 Refresh of special register (for link) (D)

FUNCTIONS

PREPARATORY

PROCEDURES BEFORE

OPERATION

LINK DATA SEND/

RECEIVE PROCESSING

AND PROCESSING TIME

PROGRAMMING

3.6 Details of Buffer Memory

3.6.6 Special relay (for link) (M9200 to M9255)

TROUBLESHOOTING

3 - 26

Actual I/OActual I/O

Master station

400

Q series

local station

400

Actual I/OActual I/O

480

4FF

480

4FF

Local module CPU module

Input (X) Input (X)

150

190

197

1CF

Output (Y)

1D0

218

21F

24F

Output (Y)

X400 to X40F

Host station receive range

Y480 to Y48F

Host station send range

X470 to X47F

X400 to X40F

X470 to X47F

Y4F0 to Y4FF

Y480 to Y48F

Y4F0 to Y4FF

SPECIFICATIONS

3.6.8 Input (X0 to X7FF) and output (Y0 to Y7FF)

Data of input (X0 to X7FF) and output (Y0 to Y7FF) of X/Y communication is stored. Refresh devices of the CPU module and the data in this area using the following area in a sequence program.

• Presence or absence of refresh information table (Buffer memory address: 0

• Refresh information table (Buffer memory address: 2 The following shows the refresh of input (X) and output (Y) when link parameters are set as follows:

H to 27H)

Figure 3.14 Link parameter setting

Figure 3.15 Refresh of input (X) and output (Y)

3 - 27

3.6 Details of Buffer Memory

3.6.8 Input (X0 to X7FF) and output (Y0 to Y7FF)

Link parameters of second tier

ML1

100 200

L2/m

300 400

200

L2/m

300

280l22C0

Second

tier

l1l2

Third

tier

L2/m

B/W 0

ML1

L2/m

500 600 700 FFF

(Empty)(Empty)

600

L2/m

700

680l26C0B/W 0 FFF

Link parameters of master station for third tier (L2/m)

First half of link parameters Latter half of link parameters

B200 to B20F

B270 to B27F

Local module CPU module

Other station send range (1)

(First half of link parameters)

Send range of master station for second tier

(First half of link parameters)

Host station send range

(First half of link parameters)

Other station send range (2)

(First half of link parameters)

Other station send range (1)

(Latter half of link parameters)

Send range of master station for second tier

(Latter half of link parameters)

Host station send range

(Latter half of link parameters)

Other station send range (2)

(Latter half of link parameters)

Link relay (B) Link relay (B)

250

25FH

270H

27FH

290H

29FH

2B0H

2BFH

277H 278H

27BH

27CH

2B7H 2B8H

2BBH

2BCH

34FH

B0 to BF

BF0 to BFF

B0 to BF

BF0 to BFF

B200 to B20F

B270 to B27F

B280 to B28F

B2B0 to B2BF

B280 to B28F

B2B0 to B2BF

B2C0 to B2CF

B2F0 to B2FF

B2C0 to B2CF

B2F0 to B2FF

B600 to B60F

B670 to B67F

B400 to B40F

B4F0 to B4FF

B680 to B68F

B6B0 to B6BF

B6C0 to B6CF

B6F0 to B6FF

B400 to B40F

B4F0 to B4FF

B600 to B60F

B670 to B67F B680 to B68F

B6B0 to B6BF B6C0 to B6CF

B6F0 to B6FF

SPECIFICATIONS

3.6.9 Link relay (B0 to BFFF)

The data of a link relay (B0 to BFFF) for the B/W communication is stored. Refresh devices of the CPU module and the data in this area using the following area in a sequence program.

• Presence or absence of refresh information table (Buffer memory address: 0

• Refresh information table (Buffer memory address: 2 The following shows the refresh of a link relay (B) for the case where link parameters are set as shown below and a local module is a local station in the third tier (l1 station).

H to 27H)

OVERVIEW

SYSTEM

CONFIGURATION

SPECIFICATIONS

Figure 3.16 Link parameter setting

FUNCTIONS

PREPARATORY

PROCEDURES BEFORE

OPERATION

LINK DATA SEND/

RECEIVE PROCESSING

AND PROCESSING TIME

Figure 3.17 Refresh of link relay (B)

3.6 Details of Buffer Memory

3.6.9 Link relay (B0 to BFFF)

PROGRAMMING

TROUBLESHOOTING

3 - 28

Link parameters of second tier

ML1

100 200

L2/ m

300 400

200

L2/m

300

280l22C0

Second

tier

l1l2

Third tier

L2/m

B/W 0

ML1

L2/m

500 600 700 FFF

(Empty)(Empty)

600

L2/m

700

680l26C0B/W 0 FFF

Link parameters of master station for third tier (L2/m)

First half of link parameters Latter half of link parameters

W200

W27F

Local module CPU module

Other station send range (1)

(First half of link parameters)

Send range of master station for second tier

(First half of link parameters)

Host station send range

(First half of link parameters)

Other station send range (2)

(First half of link parameters)

Other station send range (1)

(Latter half of link parameters)

Send range of master station for second tier

(Latter half of link parameters)

Host station send range

(Latter half of link parameters)

Other station send range (2)

(Latter half of link parameters)

Link register (W) Link register (W)

400

4FFH

600H

6FFH

800H

8FFH

A00H

67FH

680H

6BFH 6C0H

A7FH A80H

ABFH AC0H

13FFH

WFF

W280

W2BF W2C0

W2FF

W600

W67F

W400

W4FF

W680

W6BF W6C0

W6FFAFF

W200

W27F

WFF

W280

W2BF W2C0

W2FF

W600

W67F

W400

W4FF

W680

W6BF W6C0

W6FF

SPECIFICATIONS

3.6.10 Link register (W0 to WFFF)

The data of a link register (W0 to WFFF) for the B/W communication is stored. Refresh devices of the CPU module and the data in this area using the following area in a sequence program.

• Presence or absence of refresh information table (Buffer memory address: 0

• Refresh information table (Buffer memory address: 2 The following shows the refresh of a link register (W) for the case where link parameters are set as shown below and a local module is a local station in the third tier (l1 station).

H to 27H)

Figure 3.18 Link parameter setting

3 - 29

3.6 Details of Buffer Memory

3.6.10 Link register (W0 to WFFF)

Figure 3.19 Refresh of link register (W)

Buffer memory

FUNCTIONS

CHAPTER4 FUNCTIONS

This chapter describes the functions of the local module.

4.1 Cyclic Transmission Function

This function allows cyclic data communication between master and local stations.

4.1.1 1 : n communication (B/W communication)

Data are written to the host station send range in the link relay (B) and link register (W), and they are sent to other stations. The link relay (B) handles ON/OFF information, and the link register (W) sends and receives 16-bit data.

OVERVIEW

SYSTEM

CONFIGURATION

Master station

Data memory

storage area

Local station

Data memory

storage area

Q series local station

Local module

Buffer memory

Link data

storage area

Link data

storage area

Figure 4.1 B/W communication data flow

Link data

storage area

Data flow (Send/receive processing)

Link scan

Link refresh

CPU module

Data memory

storage area

SPECIFICATIONS

FUNCTIONS

PREPARATORY

PROCEDURES BEFORE

OPERATION

LINK DATA SEND/

RECEIVE PROCESSING

AND PROCESSING TIME

4.1 Cyclic Transmission Function

4.1.1 1 : n communication (B/W communication)

PROGRAMMING

TROUBLESHOOTING

4 - 1

100 200 300 380

(Empty)

FFF280 2C0

L1L3

Second

tier

l1l2

Third

tier

L2/m

ML1L2/ml1l2L3

Readable range

Writable range

B/W 0

FUNCTIONS

(1) Each station send range in B/W

Each station send range in B/W is set up with link parameters of the master station. The following explains a link parameter setting example and send/receive ranges for local modules.

(a) Link parameter setting example

Link parameters must be set to the master station for the second tier (M) and the master station for the third tier (L2/m).

Second

tier

L2/m

Third

tier

Link parameters for second tier

B/W 0

L1L3

Link parameters of master station for third tier (L2/m)

l1l2

Figure 4.2 Link parameter setting example

100 200

First half of link parameters

200

First half of link parameters

L2/m

280l22C0

300 380

300

FFF

(Empty)

FFFB/W 0

(b) Send/receive ranges when the local module is on the second-tier local station (L1)

1) L1 station writes data into the range of B/W100 to 1FF, and sends them to other stations.

2) It can receive data written by other stations within the ranges of B/W0 to FF and B/W200 to 37F.

4 - 2

Figure 4.3 Send/receive ranges when the local module is on the second-tier local station (L1)

4.1 Cyclic Transmission Function

4.1.1 1 : n communication (B/W communication)

100 200 300 380

(Empty)

FFF280 2C0

Second

tier

Third

tier

L2/m

ML1L2/ml2L3

Readable range

Writable range

B/W 0

Q series local station

Local module CPU module

Link data

storage area

Buffer memory

Data memory

storage area

Link scan Link refresh

Data flow (Send/receive processing)

400

4FFH 500H

5FFH

Receive processing

DMOV Z0

BMOV W0Z0 Z1

Send processing

W0 to WFF

W100 to W1FF

"A part" of the program for refresh

U0\ G4

U0\ G1024Z0

DMOV Z0

U0\ G2

BMOV W0Z0 Z1

U0\ G1024Z0

W0 to WFF

W100 to W1FF

FUNCTIONS

1) l1 station writes data into the range of B/W280 to 2BF, and sends them to other

stations.

2) It can receive data written by other stations within the ranges of B/W0 to FF,

B/W200 to 27F, and B/W2C0 to 2FF.

Figure 4.4 Send/receive ranges when the local module is on the third-tier local station (l1)

(2) Link refresh of link data

Q series local stations refresh link data using the sequence program. Note that refresh is not executed when the CPU module is in STOP status.

CHAPTER 7 PROGRAMMING

OVERVIEW

SYSTEM

CONFIGURATION

SPECIFICATIONS

FUNCTIONS

Figure 4.5 Link refresh of link data (Q series local station)

4.1.1 1 : n communication (B/W communication)

4.1 Cyclic Transmission Function

4 - 3

PREPARATORY

PROCEDURES BEFORE

OPERATION

LINK DATA SEND/

RECEIVE PROCESSING

AND PROCESSING TIME

PROGRAMMING

TROUBLESHOOTING

END processing

Program for data link

CPU module

Link

module

B1FF

BFF

B100

Send request

CPU module

Local module

buffer memory

B1FF

BFF B100

B100

Send request

B100

Link refresh

Cyclic transmission

250

25FH 260H

26FH

Program for refresh

END processing

Program for data link

Master station Q series local station

FUNCTIONS

(3) B/W communication example

The following illustrates an example where link relay (B) data are transferred between the master station and a Q series local station (L1).

Figure 4.6 B/W communication example

4 - 4

4.1 Cyclic Transmission Function

4.1.1 1 : n communication (B/W communication)

Buffer memory

Actual I/O

FUNCTIONS

4.1.2 1 : 1 communication (X/Y communication)

Using a part of the I/O points assigned to a master station and a local station, one-to-one data communication is performed between the master and local stations. The sending and receiving sides are regarded as output (Y) and input (X) respectively.

Q series local station

Master station

Data memory

storage area

Link data

storage area

Figure 4.7 X/Y communication data flow

Local module

Buffer memory

Link data

storage area

Data flow (Send/receive processing)

Link scan

Link refresh

CPU module

Data memory

storage area

OVERVIEW

SYSTEM

CONFIGURATION

SPECIFICATIONS

Program for data link

Output instruction

Y400

X480

(1) I/O ranges in X/Y

The I/O ranges of X/Y are set up with link parameters of the master station.

(2) Link refresh of link data

Q series local stations refresh link data using the sequence program. Note that refresh is not executed when the CPU module is in STOP status.

CHAPTER 7 PROGRAMMING

(3) X/Y communication example

The following illustrates an example where input (X) and output (Y) data are transferred between the master station and a Q series local station.

Master station Q series local station

CPU module

XY XY

Actual I/O

400

47F 480

4FF

Link

module

Local module

buffer memory

190H

218H

21FH

CPU module

Actual I/O

Program for refresh

Program for data link

X400

400

47F197

Output

480

instruction

4FF

Y480

FUNCTIONS

PREPARATORY

PROCEDURES BEFORE

OPERATION

LINK DATA SEND/

RECEIVE PROCESSING

AND PROCESSING TIME

END processing

Figure 4.8 X/Y communication example

4.1.2 1 : 1 communication (X/Y communication)

END processing

Cyclic transmission

Link refresh

4.1 Cyclic Transmission Function

PROGRAMMING

TROUBLESHOOTING

4 - 5

Q series local station

Local module

CPU module

Link data

storage area

Buffer memoryBuffer memory

Data memory

storage area

DCH

DMOV Z0

BMOV D0Z1 Z2

Write data

Master station

Data memory

storage area

D20 to D29

Command

LWTP

Device write

D200 to D209

= K4

MOV Z2

= H4420 Z0

U0\ G174

U0\ G220

U0\ G216

U0\ G219

"A part" of the program for receiving LWTP instruction

FUNCTIONS

4.2 Transient Transmission Function

When a transient request is made, this function allows data communication between a master station and a local station.

(1) Communication from a master station to a local station

(a) Communication from a master station to a local station

By executing the LRDP/LWTP instruction in the sequence program of the master station, data can be read from or written to local station devices (T, C, D, W).

(b) LRDP/LWTP instruction receive processing

Q series local stations handle the reception of the LRDP/LWTP instruction with the sequence program. If the LRDP/LWTP instruction is received when the CPU module is in STOP status, the local module will send an error response to the master station (4: LRDP/LWTP inexecutable on the station).

CHAPTER 7 PROGRAMMING

4 - 6

Figure 4.9 LWTP instruction receive processing (Q series local station)

4.2 Transient Transmission Function

Remark

FUNCTIONS

Unable to access a Q series local station.

Peripheral

Local station

Peripheral

(2) Access from a peripheral or intelligent function module to another

station

Master station

MELSECNET (II)

Q series local station

OVERVIEW

SYSTEM

CONFIGURATION

SPECIFICATIONS

Figure 4.10 Access from a peripheral or intelligent function module to another station

Station with peripheral

(Access source)

Master station

Local station (A/QnA series)

Local station (Q series)

Remote I/O station

Unable to access another station.

GX Developer

Peripherals and special function modules connected to a CPU module can access another station via MELSECNET (II). The table below shows which station is accessible from a station with a peripheral. For executable functions, refer to the following manual.

Manual for the relevant peripheral or special function module.

Table 4.1 Station accessible from a station with a peripheral

Accessible station (Access destination)

Master station

Local station

(A/QnA series)

( for host)

Local station

(Q series)

Remote I/O station

FUNCTIONS

PREPARATORY

PROCEDURES BEFORE

OPERATION

LINK DATA SEND/

RECEIVE PROCESSING

AND PROCESSING TIME

PROGRAMMING

* 1 Not accessible when GX Developer is used.

4.2 Transient Transmission Function

: Accessible, : Not accessible

TROUBLESHOOTING

4 - 7

FUNCTIONS

4.3 RAS Functions

This chapter explains the RAS functions.

4.3.1 Automatic return function

When a local station disconnected due to a data link error is recovered, this function allows the station to automatically return to the network and to restart data link. The automatic return function is set by the mode setting switch of each link module.

Section 5.3 Part Names and Settings Conditions for reconnecting a disconnected station vary depending on whether the automatic return function is supported or not, as shown below.

(1) When data link is interrupted due to an error in a master station

Table 4.2 Conditions for reconnecting a disconnected station depending on whether

Automatic return function

Master station Local station

Supported

Not supported

the automatic return function is supported or not

Conditions for reconnecting a disconnected station (local station)

Supported Automatically reconnected after the faulty part of the master station is corrected.

Not supported

Supported Automatically reconnected after the faulty part of the master station is corrected.

Not supported

Take actions to correct the faulty part of the master station.

Reset the master station, and then the disconnected station.

Take actions to correct the faulty part of the master station.

Reset the disconnected station, and then the master station.

(2) When a station is disconnected due to an error occurred in the station

Table 4.3 Conditions for reconnecting a disconnected station depending on whether

the automatic return function is supported or not

Automatic return function

Master station Local station

Supported Automatically returns after the faulty part of the disconnected station is corrected.

Supported

Not supported

Supported Take actions to correct the faulty part of the disconnected station.

Not supported

Conditions for reconnecting a disconnected station (local station)

Take actions to correct the faulty part of the disconnected station.

Reset the disconnected station.

Reset the disconnected station and the local station without automatic return

function, and then the master station.

4 - 8

4.3 RAS Functions

4.3.1 Automatic return function

Master station

No.5 No.3

No.2

No.1

No.4

Disconnected

Forward loop

Reverse loop

FUNCTIONS

4.3.2 Loopback function

This function disconnects a faulty part such as a disconnected cable or a faulty station from the network, allowing data link to continue among normally operating stations. (Not provided for the MELSECNET/B data link system) Normally, data link is performed using the forward loop.

(1) When an error occurs on the forward loop

When a cable disconnection or a cable connector failure occurs on the forward loop, data link using the forward loop is not executable. In such a case, the system automatically switches the line from the forward loop to the reverse loop to continue data link.

OVERVIEW

SYSTEM

CONFIGURATION

SPECIFICATIONS

Figure 4.11 When an error occurs on the forward loop

(2) When errors occur on the forward and reverse loops

When cable disconnections or cable connector failures occur on the forward and reverse loops, data link using these loops is not executable. Viewing from the master station, loopback occurs at the station just before the fault, and data link is performed among data-link-executable stations only. (All stations located between the faulty stations are disconnected.)

No.2, loopback station

Master station

Disconnected

No.1

Reverse loop

Forward loop

Disconnected

FUNCTIONS

PREPARATORY

PROCEDURES BEFORE

OPERATION

LINK DATA SEND/

RECEIVE PROCESSING

AND PROCESSING TIME

PROGRAMMING

No.5, loopback station

Figure 4.12 When errors occur on the forward and reverse loops

No.4

No.3

4.3 RAS Functions

4.3.2 Loopback function

TROUBLESHOOTING

4 - 9

Master station

No.2, loopback station

No.1

Forward loopReverse loop

No.5 No.3 (Power OFF)No.4,

loopback station

FUNCTIONS

(3) When a local station is powered down

When power of a local station is turned OFF, data link is disabled. Viewing from the master station, loopback occurs at the station just before the faulty station, and data link is performed among data-link-executable stations only. (The power-off station is disconnected.)

Figure 4.13 When a local station is powered down

4 - 10

4.3 RAS Functions

4.3.2 Loopback function

FUNCTIONS

4.3.3 Error detection function

Data of the special relay (for link) and special register (for link) of a local module are refreshed into CPU module devices. With the refreshed devices, the data link status or a faulty part can be checked. For details of the special relay (for link) and special register (for link), refer to the following.

Appendix 1 List of Special Relays (for Link) Appendix 2 List of Special Registers (for Link) Note that the network diagnostics of GX Developer is not available for Q series local stations. Check the data link status or a faulty part in the above-mentioned way.

OVERVIEW

SYSTEM

CONFIGURATION

SPECIFICATIONS

FUNCTIONS

PREPARATORY

PROCEDURES BEFORE

OPERATION

LINK DATA SEND/

RECEIVE PROCESSING

AND PROCESSING TIME

PROGRAMMING

4.3 RAS Functions

4.3.3 Error detection function

TROUBLESHOOTING

4 - 11

PREPARATORY PROCEDURES BEFORE

OPERATION

CHAPTER5 PREPARATORY PROCEDURES BEFORE

OPERATION

This chapter describes the procedures up to connect a local module to the network and wiring procedures.

5.1 Implementation and Installation

This section describes handling precautions, from unpacking to installation of the local module. For details of the implementation and installation of the local module, refer to the following:

• For Q series

QCPU User's Manual (Hardware Design, Maintenance and Inspection)

• For L series

MELSEC-L LA1S Extension Base Unit User's Manual

5.1.1 Handling precautions

The following describes precautions for handling the single local module.

(1) Do not drop or give strong impact on the module, since its case is made

of resin.

(2) Do not remove a printed-circuit board of the module from a case.

Doing so may cause failure.

(3) Be careful to prevent foreign matter such as wire chips from entering the

module top at the time of wiring.

(4) Tighten a module mounting screw or a terminal screw within the

following range.

Screw Tightening torque range

Terminal screw for cable terminal block (M3.5 screw)

Mounting screw for cable terminal block (M3.5 screw)

Module mounting screw (M4 screw)

Table 5.1 Screw tightening torque

59 to 88N cm

78 to 118N cm

5 - 1

5.1 Implementation and Installation

5.1.1 Handling precautions

PREPARATORY PROCEDURES BEFORE

POINT

Start

Check prior to power-onCheck prior to power-on

Power-onPower-on

Local module single checkLocal module single check

Connection of cableConnection of cable

Connect link modules via a cable.

Line check between two stationsLine check between two stations

Link parameter setting for the master stationLink parameter setting for the master station

Set link parameters for the master station.

Type MELSECNET, MELSECNET/B Data Link System Reference Manual

Line check (not provided for MELSECNET/B)Line check (not provided for MELSECNET/B)

Programming for refreshProgramming for refresh

Programming and debugProgramming and debug

END

Set the RUN/STOP switch of the CPU module to STOP. Check to see if the external power supply voltage for the power supply module is within the stipulated range.

Turn ON the external power supply. Check to see if RUN LED of a local module is turned ON.

Check the hardware of a local module by the selfloopback test.

Check the line between the two adjacent stations by the station-to-station test.

Create a program for refresh. Set the RUN/STOP switch of the CPU module to RUN, and check the program.

Check the forward loop or reverse loop side line of the MELSECNET.

Create a program for data link and check the program.

Type MELSECNET, MELSECNET/B Data Link System Reference Manual

Section 5.5.1 Self-loopback test

Section 5.4 Wiring

Section 5.5.2 Station-to-station test

CHAPTER 7 PROGRAMMING

Section 5.5.3 Forward loop test/reverse loop

OPERATION

5.2 Preparatory Procedures before Operation

This section describes the outline of preparatory procedures before operation.

OVERVIEW

SYSTEM

CONFIGURATION

SPECIFICATIONS

Figure 5.1 Preparatory procedures before operation

The link parameter setting (refresh parameter) is not required for a Q series local station since refresh is performed in a sequence program.

5.2 Preparatory Procedures before Operation

5 - 2

FUNCTIONS

PREPARATORY

PROCEDURES BEFORE

OPERATION

LINK DATA SEND/

RECEIVE PROCESSING

AND PROCESSING TIME

PROGRAMMING

TROUBLESHOOTING

PREPARATORY PROCEDURES BEFORE

OPERATION

5.3 Part Names and Settings

This chapter describes the part names and settings of the local module.

1) 1) 1)

2) 2)

3) 3)

5) 6)

Figure 5.2 Outside drawing of local module

Table 5.2 Part names and settings

No. Name Description

LED

Name Status Description

RUN

SD Data sending

RD Data receiving

F.LOOP Forward loop side receives data (OFF: Reverse loop side receives data)

CPU Communication with CPU module in execution

125k

250k

500k

CRC

OVER The processing of receive data has been delayed.

AB.IF

TIME Data link monitoring time is over.

DATA The data of error code has been received.

UNDER

UND.

F.LOOP Receive error at forward loop side

R.LOOP Receive error at reverse loop side

ON Setting status of communication speed (A1SJ71AT23BQ)

ON (OFF

if normal)

Data link normal

Code check error of receive data

•"1" has been received consecutively more than stipulated times.

•Receive data length is shorter than stipulated length.

Internal processing of send data is not executed constantly.

5 - 3

5.3 Part Names and Settings

(A1SJ71AP23Q/

A1SJ71AR23Q)

(A1SJ71AT23BQ)

Reverse loop send

ININ

Forward loop receive

Forward loop send

OUTOUT

Reverse loop receive

OUTOUT

PREPARATORY PROCEDURES BEFORE OPERATION

Table 5.2 Part names and settings(Continued)

No. Name Description

Station No. setting switch

(A1SJ71AP23Q/

A1SJ71AR23Q)

(A1SJ71AT23BQ)

Te ns

place

Ones place

Mode setting switch

Communication speed setting

4) switch (A1SJ71AT23BQ)

Sets station No. of the local module.(Factory default setting: 1) (Refer to (1) in this section)

Te ns

•A1SJ71AP23Q/A1SJ71AR23Q

place

Ones place

1 to 64: Station No.

(If other than above is set, the local module goes into offline status (X0=ON).)

•A1SJ71AT23BQ

1 to 31: Station No.

(If other than above is set, the local module goes into offline status (X0=ON).)

Sets operation mode.(Factory default setting: 0)

No. Item Description

0 Online Data link (with automatic return function)

1 Online Data link (without automatic return function)

2 Offline Disconnects host station.

Station-to-station test

(Executing station)

Station-to-station test

(Other station)

7 Self-loopback test

8 to F -

Sets communication speed.

No. Communication speed

0 125kbps

1 250kbps

2 500kbps

31Mbps

4 to F Unusable (If set, the local module goes into offline status (X0=ON).)

Connects an optical fiber cable.

Unusable (If set, the local module goes into offline status

(X0=ON.))

Checks a line between two adjacent stations.

Checks the hardware including transmission circuit in a

single local module.

Unusable (If set, the local module goes into offline status

(X0=ON).)

OVERVIEW

SYSTEM

CONFIGURATION

SPECIFICATIONS

FUNCTIONS

PREPARATORY

PROCEDURES BEFORE

OPERATION

5) Connector (A1SJ71AP23Q)

5.3 Part Names and Settings

LINK DATA SEND/

RECEIVE PROCESSING

AND PROCESSING TIME

PROGRAMMING

TROUBLESHOOTING

5 - 4

PREPARATORY PROCEDURES BEFORE

POINT

IN R-SD

IN F-RD

OUT R-RD

OUT F-SD

Master station for second tier

OUTIN

Slave station

No.1

Station

No.01

OUTIN

Master station

for third tier

Station

No.00

Station

No.00

OUTIN

Slave station

No.2

Station

No.02

OUTIN

Slave station

No.3

Station

No.03

OUTIN

Slave station

No.64

Tertiary station

No.1

Tertiary station

No.2

Tertiary station

No.64

Station

No.64

Station

No.01

Station

No.02

Station

No.64

OUTIN

OUTIN OUTIN OUTIN

Forward loop direction

No. Name Description

6) Connector (A1SJ71AR23Q)

OPERATION

Table 5.2 Part names and settings(Continued)

Connects a coaxial cable.

Terminal block

7) (A1SJ71AT23BQ)

Reverse loop receive

Forward loop send

Connects a shielded twisted pair cable.

(1) Station No. setting

(a) MELSECNET data link system

Set "00" to the station No. of the master station, and set station No.

(01 02 n(n 64) to slave stations starting from the one next to the master station.

OUT R-RD

OUT F-SD

IN R-SD

IN F-RD

Reverse loop send

Forward loop receive

5 - 5

5.3 Part Names and Settings

Figure 5.3 Station No. setting of MELSECNET data link system

(1) Set station No. from the smallest number in order. (2) Do not skip any station No., since it has to be set in number order. (3) Set station No. so as not to overlap with other station No. in the same tier.

POINT

Master station

Slave station

No.1

Station

No.01

Station

No.00

Station

No.03

Station

No.02

Station

No.31

Slave station

No.2

Slave station

No.3

Slave station

No.31

PREPARATORY PROCEDURES BEFORE OPERATION

(b) MELSECNET/B data link system

Set "00" to the station No. of the master station, and set station No.

(01 02 n(n 31) to slave stations starting from the one next to the master station.

Figure 5.4 Station No. setting of MELSECNET/B data link system

(1) The station No. can be set regardless of station number order.

(There is no restriction on connection order of stations including the master

station.) (2) Do not skip any station No., since it has to be set in number order. (3) Set station No. so as not to overlap with other station No. in the same tier.

OVERVIEW

SYSTEM

CONFIGURATION

SPECIFICATIONS

FUNCTIONS

PREPARATORY

PROCEDURES BEFORE

OPERATION

LINK DATA SEND/

RECEIVE PROCESSING

AND PROCESSING TIME

PROGRAMMING

5.3 Part Names and Settings

TROUBLESHOOTING

5 - 6

PREPARATORY PROCEDURES BEFORE

OPERATION

5.4 Wiring

5.4.1 Optical fiber cable

This section describes precautions for connecting and wiring cables.

The following describes how to connect an optical fiber cable with the local module.

(1) Precautions for wiring

(a) Securing of wiring space

When an optical fiber cable is connected with the local module, a cable bend radius is restricted. For details, check the specifications of the cable to be used.

(b) Laying an optical fiber cable

When laying an optical fiber cable, do not directly touch an optical fiber core of a plug or jack, and prevent dirt or dust from attaching it. If oil from hand, dirt, or dust is attached, transmission loss may increase, resulting in failure at data link. In addition, do not remove the cover from a connector of the module before installing an optical fiber cable.

Be sure to shut off all phases of the external power supply used by the system.

(2) Connection of cable

(a) Connection method

An optical fiber cable connects OUT and IN as shown below. (OUT of the last station is connected to IN of the master station.)

Slave station

No.2

Station

No.02

OUT IN OUT IN

Slave station

No.1

Station

No.01

Front

OUT IN

Figure 5.5 Connection method

Master station

Station

No.00

Front

Fron

5 - 7

5.4 Wiring

5.4.1 Optical fiber cable

Connection

End

Turn OFF the power supply.

Jack

Projection

Ditch

Plug

Local module

Insert a plug, fitting a projection of the jack into a ditch of the plug.

Plug the plug until the plug fixing hole fits the hook of jack.

Slightly pull the plug in the arrow direction to make sure that it is installed properly.

Plug

Disconnection

End

Turn OFF the power supply.

Pull out a fixing part of a plug in the arrow direction.

Cover the plug and jack with covers which covered them before connection and store them.

PREPARATORY PROCEDURES BEFORE OPERATION

(b) Connecting an optical fiber cable

OVERVIEW

SYSTEM

CONFIGURATION

Figure 5.6 Connecting an optical fiber cable

Figure 5.7 Disconnecting an optical fiber cable

SPECIFICATIONS

FUNCTIONS

PREPARATORY

PROCEDURES BEFORE

OPERATION

LINK DATA SEND/

RECEIVE PROCESSING

AND PROCESSING TIME

5.4 Wiring

5.4.1 Optical fiber cable

PROGRAMMING

TROUBLESHOOTING

5 - 8

Local module

Master station

Front

R-RD

F-SD

F-RD

R-SD

INOUT

R-RD

F-SD

F-RD

R-SD

INOUT

R-RD

F-SD

F-RD

R-SD

INOUT

Slave station No.1

Front

Slave station No.2

Station No.00Station No.01Station No.02

Front

PREPARATORY PROCEDURES BEFORE OPERATION

5.4.2 Coaxial cable

The following describes how to connect a coaxial cable with the local module.

(1) Precautions for wiring

(a) Securing of wiring space

When a coaxial cable is connected with the local module, a cable bend radius is restricted.

Figure 5.8 Allowable bend radius of coaxial cable

Table 5.3 Allowable bend radius of coaxial cable

Applicable cable

Coaxial cable

3C-2V

5C-2V 30

(b) Laying a coaxial cable

When laying a coaxial cable, keep a distance of 100mm (3.94 inch) or more from other power cables or control cables. In addition, connecting FGs of the power supply module of the base unit where the local module is mounted strengthens measures against noise.

Be sure to shut off all phases of the external power supply used by the system.

(2) Connection of cable

(a) Connection method

A coaxial cable connects OUT(F-SD, R-RD) and IN(F-RD, R-SD) as shown below. (OUT(F-SD, R-RD) of the last station is connected to IN(F-RD, R-SD) of the master station.)

Connector part

A(mm)

Allowable bend radius

r(mm)

5 - 9

5.4 Wiring

5.4.2 Coaxial cable

Figure 5.9 Connection method

Connection

End

Turn OFF the power supply.

Plug

Jack

Ditch

Projection

Local module

Insert a plug, fitting a projection of the jack into a ditch of the plug.

Rotate the plug in the arrow direction (clockwise) properly until it comes to the position shown below.

Local module

Plug

Disconnection

End

Turn OFF the power supply.

Rotate a plug in the arrow direction to loosen the connection.

Hold the plug and pull it out in the arrow direction shown below.

PREPARATORY PROCEDURES BEFORE OPERATION

(b) Connecting a coaxial cable

OVERVIEW

SYSTEM

CONFIGURATION

Figure 5.10 Connecting a coaxial cable

Figure 5.11 Disconnecting a coaxial cable

SPECIFICATIONS

FUNCTIONS

PREPARATORY

PROCEDURES BEFORE

OPERATION

LINK DATA SEND/

RECEIVE PROCESSING

AND PROCESSING TIME

PROGRAMMING

5.4 Wiring

5.4.2 Coaxial cable

TROUBLESHOOTING

5 - 10

SDA/RDA

SDB/RDB

SG(L)

SDA/RDA

SDB/RDB

SG(L)

SDA/RDA

SDB/RDB

SG(L)

SDA/RDA

SDB/RDB

SG(L)

Shielded twisted pair cable

Terminating

resistor

(110 1/2W)

Terminating

resistor

(110 1/2W)

PREPARATORY PROCEDURES BEFORE OPERATION

5.4.3 Shielded twisted pair cable

The following describes how to connect a shielded twisted pair cable with the local module.

(1) Precautions for wiring

(a) Laying shielded twisted pair cable

When laying a shielded twisted pair cable, pay attention to the following points so that it will not be affected by noise or surge induction.

1) Do not install a shielded twisted pair cable together with the main circuit, highvoltage cable, or load line, and also do not bring them closer to each other. (Keep a distance of 100mm (3.94 inch) or more between them.)

2) Do not use a part of shielded twisted pair cable (for example, one pair among three pairs) as a cable for power supply.

(b) Connection of terminating resistor

For the stations at both ends of the MELSECNET/B data link system, connect

SDA/RDA and SDB/RDB with an attached terminating resistor (110 , 1/2W).

(Refer to (2) in this section)

Be sure to shut off all phases of the external power supply used by the system.

(2) Connection of cable

A shielded twisted pair cable is connected as shown below. In addition, use a terminating resistor for stations at both ends.

Figure 5.12 Connection method

5 - 11

5.4 Wiring

5.4.3 Shielded twisted pair cable

PREPARATORY PROCEDURES BEFORE

OPERATION

5.5 Self-diagnostic Test

The self-diagnostic test checks the hardware or cable wiring of a local module.

Table 5.4 Items of self-diagnostic test

Item Description

Self-loopback test Checks the hardware including transmission circuit in a single local module.

Station-to-station test (Executing station) Checks a line between two adjacent stations.

A test is performed to a line between two stations assuming that the station

Station-to-station test (Other station)

Forward loop test

(Not provided for the MELSECNET/B)

Reverse loop test

(Not provided for the MELSECNET/B)

which has the small station No. is the executing station and the other is the

other station.

Checks a forward loop side line of the MELSECNET after connecting all

stations by a cable.

Checks a reverse loop side line of the MELSECNET after connecting all

stations by a cable.

Reference

section

Section

5.5.1

Section

5.5.2

Section

5.5.3

OVERVIEW

SYSTEM

CONFIGURATION

SPECIFICATIONS

FUNCTIONS

PREPARATORY

PROCEDURES BEFORE

OPERATION

LINK DATA SEND/

RECEIVE PROCESSING

AND PROCESSING TIME

5.5 Self-diagnostic Test

PROGRAMMING

TROUBLESHOOTING

5 - 12

R-RD

F-SD

F-RD

R-SD

INOUT

Coaxial cable

Front

Data flow of forward loop

Data flow of reverse loop

Local station

No.1

Station No.01

PREPARATORY PROCEDURES BEFORE OPERATION

5.5.1 Self-loopback test

The self-loopback test checks the hardware including transmission circuit in a single local module. The hardware is judged by whether the data sent from the send side can be received by the receive side in a given time.

(1) System configuration

(a) MELSECNET(A1SJ71AP23Q)

An optical fiber cable connects the OUT and IN of the local module.

Local station

No.1

Front

Data flow of forward loop

Data flow of reverse loop

Station

No.01

OUT IN

Optical fiber cable

Figure 5.13 MELSECNET(A1SJ71AP23Q)

(b) MELSECNET(A1SJ71AR23Q)

A coaxial cable connects the OUT and IN of the local module.

Figure 5.14 MELSECNET(A1SJ71AR23Q)

There is no need to connect a cable or terminating register to the local module.

(2) Switch setting

Set the RUN/STOP switch of the CPU module to STOP, and set the DIP switch on the front of the link module as follows:

( Section 5.3 Part Names and Settings)

Table 5.5 Switch setting

Item No. (Set value) Description

Local station No.1

Station No. setting

switch

Mode setting switch 7 Self-loopback test

01 Station No.1

5 - 13

5.5 Self-diagnostic Test

5.5.1 Self-loopback test

Start

End

Judge the test result.

Turning ON from OFF the power supply or resetting the CPU module leads to start the test.

1SJ71AP23Q

RUN

F.LOOP

CPU

CRC

OVER

AB.IF

TIME

DATA

UNDER

F.LOOP

R.LOOP

E R R

PREPARATORY PROCEDURES BEFORE OPERATION

(3) Execution of test

Figure 5.15 Execution of test

(4) Judge of test result

The LED displays the test result.

(a) When normal

ERROR LED is turned ON and OFF repeatedly in a cycle of

"CRC OVER AB.IF TIME DATA UNDER CRC ".

1SJ71AP23Q

RUN

CRC

OVERVIEW

SYSTEM

CONFIGURATION

SPECIFICATIONS

OVER

F.LOOP

CPU

Figure 5.16 When normal

(b) When failed

The LED which corresponds to the error is turned ON, and the test is canceled.

AB.IF

TIME

DATA

UNDER

F.LOOP

R.LOOP

R R O R

FUNCTIONS

PREPARATORY

PROCEDURES BEFORE

OPERATION

LINK DATA SEND/

RECEIVE PROCESSING

AND PROCESSING TIME

Figure 5.17 When failed

5.5 Self-diagnostic Test

5.5.1 Self-loopback test

PROGRAMMING

TROUBLESHOOTING

5 - 14

PREPARATORY PROCEDURES BEFORE OPERATION

1) When three LEDs (F.LOOP, R.LOOP, and TIME) are turned ON

• A forward loop cable is disconnected

• The send side and receive side of forward loop are not connected by a cable

• The send side of a forward loop and the send side of a reverse loop and the receive side of a forward loop and the receive side of a reverse loop are connected

2) When three LEDs (F.LOOP, R.LOOP, and DATA) are turned ON

• A reverse loop cable is disconnected

• The send side and receive side of a reverse loop are not connected by a cable

3) When ERROR LED other than above 1) and 2) is turned ON

• Hardware failure

• A cable is disconnected during the test

• A cable is broken during the test

5 - 15

5.5 Self-diagnostic Test

5.5.1 Self-loopback test

Executing station

No.n

Other station

No.n+1

OUT IN

Front Front

OUT IN

Data flow of

forward loop

Data flow of reverse loop

Optical fiber cable

Station

No.01

Station

No.02

Front Front

R-RD

F-SD

F-RD

R-SD

INOUT

R-RD

F-SD

F-RD

R-SD

INOUT

Coaxial cable

Executing station No.n Other station No.n+1

Data flow of

reverse loop

Data flow of

forward loop

Station No.01 Station No.02

PREPARATORY PROCEDURES BEFORE OPERATION

5.5.2 Station-to-station test

The station-to-station test checks a line between two adjacent stations. A test is performed to a line between two stations assuming that the station which has the small station No. is the executing station and the other is the other station. The line is judged by whether the data sent from the executing station can be sent from the other station in a given time.

(1) System configuration

OVERVIEW

(a) MELSECNET(A1SJ71AP23Q)

An optical fiber cable connects OUT of the executing station and IN of the other station.

Figure 5.18 MELSECNET(A1SJ71AP23Q)

(b) MELSECNET(A1SJ71AR23Q)

A coaxial cable connects OUT of the executing station and IN of the other station.

SYSTEM

CONFIGURATION

SPECIFICATIONS

FUNCTIONS

PREPARATORY

PROCEDURES BEFORE

OPERATION

Figure 5.19 MELSECNET(A1SJ71AR23Q)

5.5 Self-diagnostic Test

5.5.2 Station-to-station test

5 - 16

LINK DATA SEND/

RECEIVE PROCESSING

AND PROCESSING TIME

PROGRAMMING

TROUBLESHOOTING

SDA/RDA

SDB/RDB

SG(L)

SDA/RDA

SDB/RDB

SG(L)

Shielded twisted pair cable

Shield Shield

Data flow

Executing station No.n Other station No.n+1

SDA/SDB of executing station RDA/RDB of other station

RDA/RDB of executing station SDA/SDB of other station

Terminating resistor

(110 1/2W)

Terminating resistor

(110 1/2W)

Start

End

Judge the test result.

Turn ON from OFF the power supply of the other station or reset the CPU module.

Turning ON from OFF the power supply of the executing station No.n or resetting the CPU module leads to start the test.

PREPARATORY PROCEDURES BEFORE OPERATION

The connection of the MELSECNET/B(A1SJ71AT23BQ) is as follows:

Figure 5.20 MELSECNET/B(A1SJ71AT23BQ)

(2) Switch setting

Set the RUN/STOP switch of the CPU module to STOP, and set the DIP switch on the front of the link module as follows:

( Section 5.3 Part Names and Settings)

Item No. (Set value) Description

Executing station No. n

Other station No. n + 1

(3) Execution of test

Table 5.6 Switch setting

Station No. setting

switch

Mode setting switch 5 Station-to-station test (Executing station)

Station No. setting

switch

Mode setting switch 6 Station-to-station test (Other station)

01 Station No.1

02 Station No.2

5 - 17

5.5 Self-diagnostic Test

5.5.2 Station-to-station test

Figure 5.21 Execution of test

1SJ71AP23Q

RUN

F.LOOP

CPU

CRC

OVER

AB.IF

TIME

DATA

UNDER

F.LOOP

R.LOOP

E R R O R

PREPARATORY PROCEDURES BEFORE OPERATION

(4) Judge of test result

The LED of the executing station displays the test result.

(a) When normal

ERROR LED is turned ON and OFF repeatedly in a cycle of

"CRC OVER AB.IF TIME DATA UNDER CRC ".

1SJ71AP23Q

RUN

CRC

OVER

F.LOOP

CPU

Figure 5.22 When normal

(b) When failed

The LED which corresponds to the error is turned ON, and the test is canceled.

AB.IF

TIME

DATA

UNDER

F.LOOP

R.LOOP

R R O R

OVERVIEW

SYSTEM

CONFIGURATION

SPECIFICATIONS

FUNCTIONS

Figure 5.23 When failed

1) When two LEDs (F.LOOP and TIME) are turned ON

• A forward loop cable is disconnected

• The send side and receive side of forward loop are not connected by a cable

2) When three LEDs (F.LOOP, R.LOOP, and TIME) are turned ON

• A reverse loop cable is disconnected

• The send side and receive side of a reverse loop are not connected by a cable

• The send side of a forward loop and the send side of a reverse loop are connected, and the receive side of a forward loop and the receive side of a reverse loop are connected.

3) When ERROR LED other than above 1) and 2) is turned ON

• Hardware failure

• A cable is disconnected during the test

• A cable is broken during the test

5.5 Self-diagnostic Test

5.5.2 Station-to-station test

5 - 18

PREPARATORY

PROCEDURES BEFORE

OPERATION

LINK DATA SEND/

RECEIVE PROCESSING

AND PROCESSING TIME

PROGRAMMING

TROUBLESHOOTING

POINT

PREPARATORY PROCEDURES BEFORE OPERATION

5.5.3 Forward loop test/reverse loop test

The forward loop test/reverse loop test checks a forward or reverse loop side line of the MELSECNET after connecting all stations via a cable. (Not provided for the MELSECNET/B data link system)

• Forward loop test The line is judged by whether the data sent from a forward loop send side of the master station can be received by a forward loop receive side of the master station.

• Reverse loop test The line is judged by whether the data sent from a reverse loop send side of the master station can be received by a reverse loop receive side of the master station.

(1) Execute a forward or reverse loop line test, setting a Q series local station to

the RUN status (Y10=ON). If the test is conducted in STOP status (Y10=OFF), the master station treats the Q series local station as a faulty station (relevant bit in D9228 to D9231 is turned ON).However, the test is normally conducted.

(2) Set link parameters for the master station when executing a forward or

reverse loop back test.(At least set the total number of slave stations)

(1) System configuration

(a) MELSECNET(A1SJ71AP23Q)

An optical fiber cable connects the OUT and IN of all stations.

Local station

No.2

Station

No.02

OUT IN

Local station

No.1

Station

No.01

Front Front Front

Data flow of forward loop

Data flow of reverse loop

Figure 5.24 MELSECNET(A1SJ71AP23Q)

Master station

Station

No.00

OUT INOUT IN

Optical fiber cable

GX Develope

5 - 19

5.5 Self-diagnostic Test

5.5.3 Forward loop test/reverse loop test

Master station

Station No.02

Front Front Front

R-RD

F-SD

F-RD

R-SD

OUT

R-RD

F-SD

F-RD

R-SD

INOUT

R-RD

F-SD

F-RD

R-SD

INOUT

Local station

No.1

Station No.01 Station No.00

Data flow of forward loop

Data flow of reverse loop

Coaxial cable

GX Developer

Local station

No.2

Start

End

Judge the test result.

Put Q series local station into the RUN status (Y10=ON).

Turn ON from OFF the power supply of a slave station or reset the CPU module.

Turning ON from OFF the power supply of the master station or resetting the CPU module leads to start the test.

PREPARATORY PROCEDURES BEFORE OPERATION

(b) MELSECNET(A1SJ71AR23Q)

A coaxial cable connects the OUT and IN of all stations.

Figure 5.25 MELSECNET(A1SJ71AR23Q)

(2) Switch setting

Set the RUN/STOP switch of the CPU module to STOP, and set the DIP switch on the front of the link module as follows:

( Section 5.3 Part Names and Settings)

Table 5.7 Switch setting

Item No. (Set value) Description

Station No. setting switch 00 Station No.0

Master station

Slave stations No.1 and No.2

(Local stations No.1 and No.2)

(3) Execution of test

Mode setting switch

Station No. setting switch 01, 02 Station No.1 and 2

Mode setting switch 0 Online (with automatic return function)

3 Forward loop test

4 Reverse loop test

OVERVIEW

SYSTEM

CONFIGURATION

SPECIFICATIONS

FUNCTIONS

Figure 5.26 Execution of test

5.5.3 Forward loop test/reverse loop test

5.5 Self-diagnostic Test

5 - 20

PREPARATORY

PROCEDURES BEFORE

OPERATION

LINK DATA SEND/

RECEIVE PROCESSING

AND PROCESSING TIME

PROGRAMMING

TROUBLESHOOTING

POINT

PREPARATORY PROCEDURES BEFORE OPERATION

(4) Judge of test result

The LED of the master station displays the test result.

(a) When normal

ERROR LED is turned ON and OFF repeatedly in a cycle of

"CRC OVER AB.IF TIME DATA UNDER CRC ".

1SJ71AP21

RUN

CRC

OVER

F.LOOP

CPU

Figure 5.27 When normal

(b) When failed

The LED which corresponds to the error is flashed, and the test is canceled.

1SJ71AP21

RUN

AB.IF

TIME

DATA

UNDER

F.LOOP

R.LOOP

CRC

OVER

R R O R

F.LOOP

AB.IF

TIME

R R O

CPU

DATA

UNDER

5 - 21

F.LOOP

R.LOOP

Figure 5.28 When failed

1) When LEDs (TIME, DATA, and UNDER) are flashing

• Hardware failure

• Loopback due to cable disconnection or error of slave stations

• The master station (00) is set for more than one station.

• Short monitoring time

When a forward/reverse loop has an error, data link is switched to the one performed by a reverse/forward loop. When the forward/reverse loop returns normal, data link is performed by it. However, LED display shows an error. Perform a forward or reverse loop test after resetting the master station.

5.5 Self-diagnostic Test

5.5.3 Forward loop test/reverse loop test

LINK DATA SEND/RECEIVE PROCESSING AND

Link data

storage area

Link refresh

Data memory

storage area

Link scan

Q series local station

Local module

Link data

storage area

Link refresh

CPU module

Data memory

storage area

Master station

Buffer memoryBuffer memory

PROCESSING TIME

CHAPTER6 LINK DATA SEND/RECEIVE PROCESSING

AND PROCESSING TIME

This chapter describes how link data are sent or received in the data link system, and its processing time.

6.1 Link Data Send/Receive Processing

6.1.1 Send/receive processing overview

The data link system repeatedly sends and receives link data set with the link parameters of the master station.

(1) Link module configuration

A link module has a link data storage area that is provided for link data communication with other stations, and a data memory storage area that is used for processing of its own station data. The link data storage area of a Q series local station uses the buffer memory.

(2) Link data transfer

Link data are sent or received by link scan and link refresh.

(a) Link scan means link data transfer between link modules (between the link data

storage areas).

OVERVIEW

SYSTEM

CONFIGURATION

SPECIFICATIONS

FUNCTIONS

(b) Link refresh is link data transfer performed inside a link module.

1) When using CPU modules with the link function on the master and local stations Link data are sent and received between the link data storage area and the data memory storage area.

2) When using a CPU module and a link module (including the local module) Link data are sent and received between the link data storage area of the link module and the data memory storage area of the CPU module.

Figure 6.1 Link data transfer

PREPARATORY

PROCEDURES BEFORE

OPERATION

LINK DATA SEND/

RECEIVE PROCESSING

AND PROCESSING TIME

PROGRAMMING

6.1 Link Data Send/Receive Processing

6.1.1 Send/receive processing overview

TROUBLESHOOTING

6 - 1

POINT

0 END 0 END 0 END 0 END 0 END

0 ENDRe 0 ENDRe 0 ENDRe 0 ENDRe 0 ENDReEND

Master station (M)

Link scan (LS)

Q series local station (L)

: Program for refresh

LINK DATA SEND/RECEIVE PROCESSING AND PROCESSING TIME

6.1.2 Link refresh timing

A Q series local station executes a program for refresh to perform link refresh after completion of a link scan.

Section 3.4.2 Details of I/O signal

The following illustrates the link refresh timing of a Q series local station.

Figure 6.2 Link refresh timing

(1) Execute the program for refresh at the beginning of the sequence program. (2) For the link refresh timing of the master and other local stations, refer to the

following.

Type MELSECNET, MELSECNET/B Data Link System Reference

Manual

6 - 2

6.1 Link Data Send/Receive Processing

6.1.2 Link refresh timing

Master station

L1 station

M station

send range

L1 station

receive range

L2 station

receive range

M station

receive range

L1 station

send range

L2 station

receive range

M station

receive range

L1 station

receive range

L2 station

send range

B/W

Sending/receiving data

Holding data

Communication error station

L2 station

LINK DATA SEND/RECEIVE PROCESSING AND PROCESSING TIME

6.1.3 Link data handling in the case of a communication error

When a communication error occurs, link data are handled as follows. (The same for a communication error of the station connected to the bypass switch.)

• The communication error station holds link data immediately before the communication error.

• The normally operating station holds link data immediately before the communication error, in the send range of the communication error station.

(1) When a master station has a communication error

Data communications with all stations are stopped.

(a) Master station (Communication error station)

1) M9210 turns ON, or "5" is stored in D9204.

2) Data immediately before the communication error are held in the areas, M9224 to M9239 and D9202 to D9242.

OVERVIEW

SYSTEM

CONFIGURATION

3) The master station holds the data that have been received from local stations and that were present immediately before the communication error.

(b) Q series local station

1) M9250 and M9251 turn ON.

2) The station holds the data that have been received from other stations and that were present immediately before the communication error.

(2) When a Q series local station has a communication error

Data communications are continued among normally operating stations.

SPECIFICATIONS

FUNCTIONS

PREPARATORY

PROCEDURES BEFORE

OPERATION

LINK DATA SEND/

RECEIVE PROCESSING

AND PROCESSING TIME

Figure 6.3 When a Q series local station (L1) has a communication error

6.1 Link Data Send/Receive Processing

6.1.3 Link data handling in the case of a communication error

PROGRAMMING

TROUBLESHOOTING

6 - 3

LINK DATA SEND/RECEIVE PROCESSING AND PROCESSING TIME

(a) Q series local station (Communication error station)

1) M9250 and M9251 turn ON.

2) The areas, M9241 to M9255 (except for M9250 and M9251) and D9243 to D9255 store the data immediately before the communication error.

3) The station holds the data that have been received from other stations and that were present immediately before the communication error.

(b) Master station (Normally operating station)

1) The station No. of the communication error station can be checked in M9237 and D9228 to D9231.

2) The mater station holds the data that have been received from the communication error station and that were present immediately before the communication error.

1) The station No. of the communication error station can be checked in M9255 and D9252 to D9255.

2) The local station holds the data that have been received from the communication error station and that were present immediately before the communication error.

6 - 4

6.1 Link Data Send/Receive Processing

6.1.3 Link data handling in the case of a communication error

LINK DATA SEND/RECEIVE PROCESSING AND

PROCESSING TIME

6.2 Transmission Delay Time

6.2.1 Transmission delay time

The transmission delay time in the MELSECNET or MELSECNET/B data link system is calculated by the following formulas.

Table 6.1 Maximum transmission delay time for L LS M, or LS L M

Item

Master station

Local station

Master station

Local station

Link relay (B)

Link register (W)

Output (Y)

LRDP/LWTP instruction

Link relay (B)

Link register (W)

Output (Y)

Link relay (B)

Link register (W)

L LS M, or LS L M

M + 1 + LS + L 2 + 2 [ms]

M 5 + 1 5 [ms]

M 4 + 1 3 + L [ms]

M 2 + 1 2 + L1 + LS + L2 2 + 2' [ms]

OVERVIEW

SYSTEM

CONFIGURATION

SPECIFICATIONS

Master station

Local station

Master station

Local station

Master station

Local station

Master station

Local station

Table 6.2 Maximum transmission delay time for LS M L

Item

Link relay (B)

Link register (W)

Output (Y)

LRDP/LWTP instruction

Link relay (B)

Link register (W)

Output (Y)

Link relay (B)

Link register (W)

Table 6.3 Maximum transmission delay time for M L LS, or L M LS

Item

Link relay (B)

Link register (W)

Output (Y)

LRDP/LWTP instruction

Link relay (B)

Link register (W)

Output (Y)

Link relay (B)

Link register (W)

M + 1 + L 3 + 2 2 [ms]

(M + 1) 3 + (L + 2) 3 [ms]

M 3 + 1 2 + L + 2 [ms]

M + 1 + L1 + 2 + L2 3 + 2' 2 [ms]

M L LS, or L M LS

M + 1 + LS 2 + L 2 + 2 [ms]

(M + 1) 5 + LS 5 [ms]

M 4 + 1 3 + LS 3 + L [ms]

(M + 1) 2 + LS 3 + L1 + L2 2 + 2' [ms]

LS M L

FUNCTIONS

PREPARATORY

PROCEDURES BEFORE

OPERATION

LINK DATA SEND/

RECEIVE PROCESSING

AND PROCESSING TIME

PROGRAMMING

6.2 Transmission Delay Time

6.2.1 Transmission delay time

TROUBLESHOOTING

6 - 5

POINT

Master station

Local station

Master station

Local station

LINK DATA SEND/RECEIVE PROCESSING AND PROCESSING TIME

Table 6.4 Maximum transmission delay time for M LS L

Item

Link relay (B)

Link register (W)

Output (Y)

LRDP/LWTP instruction

Link relay (B)

Link register (W)

Output (Y)

Link relay (B)

Link register (W)

M + 1 + LS + L 3 + 2 2 [ms]

(M + 1) 3 + LS 3 + (L + 2) 3 [ms]

M 3 + 1 2 + LS 2 + L + 2 [ms]

M + 1 + LS + L1 + 2 + L2 3 + 2' 2 [ms]

M LS L

M: Sequence program scan time of master station

L: Sequence program scan time of local station

LS: Data transmission time

1: Link refresh time of master station

2: Link refresh time of local station

2': Link refresh time of local station (receiving side)

* 1 Can be checked by the ladder monitor of GX Developer or the monitor of the special registers

(D9017 to D9019).

* 2 Can be checked by the link monitor of GX Developer or the monitor of the master station's special

registers (for link) (D9207 to D9209) when the data link is established.

In this section, transmission delay time in the two-tier system is explained. For transmission delay time in the three-tier system, the elements shown below must be added. For details on transmission delay time in the three-tier system, refer to the following manual.

Type MELSECNET, MELSECNET/B Data Link System Reference Manual

• Delay time in transmission from master or local station in second tier to master station for third tier

• Delay time in transmission from master for third tier to local station in third tier

• Time taken for sending data received from second tier to third tier

6 - 6

6.2 Transmission Delay Time

6.2.1 Transmission delay time

LINK DATA SEND/RECEIVE PROCESSING AND PROCESSING TIME

6.2.2 Link refresh time

Link refresh processing time of a local station is calculated by the following formula.

2 = 1.5 + 0.3 N + 0.0035 { (B + X + Y) 16 + W} [ms]

2: Link refresh time of local station

N: Number of FROM/TO instructions and intelligent function module device accesses, which refreshed link data in a

sequence scan when Refresh ready status (X7) was ON

B: Total points of refreshed B

W: Total points of refreshed W

X: Total points of refreshed X

Y: Total points of refreshed Y

OVERVIEW

SYSTEM

CONFIGURATION

SPECIFICATIONS

FUNCTIONS

6.2 Transmission Delay Time

6.2.2 Link refresh time

6 - 7

PREPARATORY

PROCEDURES BEFORE

OPERATION

LINK DATA SEND/

RECEIVE PROCESSING

AND PROCESSING TIME

PROGRAMMING

TROUBLESHOOTING

LINK DATA SEND/RECEIVE PROCESSING AND

LS = K + KR (Total No. of remote I/O slave stations) + KL (Total No. of local slave stations) + KB [ms]

PROCESSING TIME

6.2.3 Link data send/receive time (Link scan)

Link data send/receive time is calculated by the following formulas.

(1) MELSECNET data link system

(a) In MELSECNET mode

(b) In MELSECNET II mode

LS = K + KL

LS = K + K

(Total No. of local slave stations + No. of local stations assigned to latter half of link parameters) + KB [ms]

R (Total No. of remote I/O slave stations) + KL

(d) Obtain values for K, K

Constant

K 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0

KR 1.3 1.3 1.4 1.4 1.5 1.5 1.6 1.6

KL 2.0 2.0 2.1 2.1 2.2 2.2 2.3 2.3

1 to 8 9 to 16 17 to 24 25 to 32 33 to 40 41 to 48 49 to 56 57 to 64

R, and KL in the formulas from the following table.

Table 6.5 Constants (K, KR, KL)

Total number of slave stations

6 - 8

6.2 Transmission Delay Time

6.2.3 Link data send/receive time (Link scan)

LINK DATA SEND/RECEIVE PROCESSING AND

(Total link points) = {B + X0 + Y0 + (W 16)} 8192 [Kbyte]

100

12345678910(Kbyte)

(ms)

(a) When the first and latter

halves of link parameters are set

(b) When only the first half

of link parameters is set

(a)

(b)

Total link points

B: Total points for link relays (B) that are used on all stations

W: Total points for link registers (W) that are used on all stations

Xo: Total points for link inputs (X) that are assigned to master station

Yo: Total points for link outputs (Y) that are assigned to master station

PROCESSING TIME

(e) Calculate the total link points (number of bytes), and obtain a value for KB from the

graph.

OVERVIEW

SYSTEM

CONFIGURATION

SPECIFICATIONS

FUNCTIONS

Figure 6.4 Constant (KB)

PREPARATORY

PROCEDURES BEFORE

OPERATION

LINK DATA SEND/

RECEIVE PROCESSING

AND PROCESSING TIME

PROGRAMMING

6.2 Transmission Delay Time

6.2.3 Link data send/receive time (Link scan)

TROUBLESHOOTING

6 - 9

LINK DATA SEND/RECEIVE PROCESSING AND

LS = K + KL (Total No. of local slave stations + No. of local stations assigned to latter half of link parameters) + KB [ms]

(Total link points) = {B + X

0 + Y0 + (W 16)} 8192 [Kbyte]

LS = K + KR (Total No. of remote I/O slave stations) + KL (Total No. of local slave stations) + KB [ms]

PROCESSING TIME

(2) MELSECNET/B data link system

(a) In MELSECNET mode

(b) In MELSECNET II mode

LS = K + KR

(Total No. of local slave stations + No. of local stations assigned to latter half of link parameters) + K

(Total No. of remote I/O slave stations) + KL

(d) K, K

L, and KR in the formulas vary depending on the communication speed of the

MELSECNET/B data link system. Obtain values for them from the following table.

Table 6.6 Constants (K, KL, KR)

Communication

speed setting

(bps)

125k

250k

500k

Constant

K 6.7 7.2 7.7 8.2

KL 3.8 3.8 3.9 3.9

R 3.9 3.9 4.0 4.0

K 5.8 6.3 6.8 7.3

KL 3.1 3.1 3.2 3.2

R 3.1 3.2 3.3 3.3

K 5.8 6.3 6.8 7.3

KL 2.7 2.7 2.8 2.8

R 2.9 2.9 3.0 3.0

K 5.8 6.3 6.8 7.3

KL 2.6 2.6 2.7 2.7

R 2.8 2.8 2.9 2.9

1 to 8 9 to 16 17 to 24 25 to 31

Total number of slave stations

(e) Calculate the total link points (number of bytes), and obtain a value for K

graph for the set communication speed (one of 1) to 4)).

[ms]

B from the

6 - 10

6.2 Transmission Delay Time

6.2.3 Link data send/receive time (Link scan)

LINK DATA SEND/RECEIVE PROCESSING AND PROCESSING TIME

(ms)

600

500

400

300

200

100

B in the case of 125kbps

1) K

(a)

(b)

(ms)

400

350

300

250

200

150

100

B in the case of 250kbps

2) K

(a) When the first and latter

halves of link parameters are set

(b) When only the first half

of link parameters is set

OVERVIEW

(a)

SYSTEM

(b)

CONFIGURATION

SPECIFICATIONS

(ms)

200

150

100

1234 5

Total link points

B in the case of 500kbps

3) K

1234 5

Total link points

6 7 8 9 10 (Kbyte)

(a)

(b)

1234 5

Total link points

B in the case of 1Mbps

4) K

(ms)

100

1234 5

Total link points

Figure 6.5 Constant (KB)

6 7 8 9 10 (Kbyte)

(a)

(b)

6 7 8 9 10 (Kbyte)

FUNCTIONS

PREPARATORY

PROCEDURES BEFORE

OPERATION

LINK DATA SEND/

RECEIVE PROCESSING

AND PROCESSING TIME

PROGRAMMING

6.2 Transmission Delay Time

6.2.3 Link data send/receive time (Link scan)

TROUBLESHOOTING

6 - 11

PROGRAMMING

CHAPTER7 PROGRAMMING

This chapter describes a program for refreshing the local module and for receiving LRDP/LWTP instruction.

7.1 System Configuration and Setting Conditions

Program examples given here are based on the following system configuration and setting conditions.

(1) System configuration

The following figure shows that a 32-point module is installed to each slot. (The points for an empty slot is 16.)

Local station No.3

Master station

00 to 1F

20 to 3F

40 to 5F

60 to 6F

(Q38B)

70 to 7F

80 to 8F

(Q65B)

90 to 9F

A0 to AF

Extension

1st

Local station No.1

(2) Switch setting

Set the DIP switches on the front face of the link module as shown below.

( Section 5.3 Part Names and Settings)

Item Number (Set value) Description

Master station

Local stations No.1 to No.3

B0 to BF

C0 to CF

D0 to DF

E0 to EF

F0 to FF

(QA1S68B)

MELSECNET II

100 to 11F

120 to 13F

140 to 15F

160 to 17F

180 to 19F

200 to 21F

A1SJ71AP23Q

Local station No.2

Figure 7.1 System configuration

Table 7.1 Switch setting

Station No. setting switch 00 Station No.0

Mode setting switch 0 Online (with automatic return function)

Station No. setting switch 01 to 03 Station No.1 to No.3

Mode setting switch 0 Online (with automatic return function)

220 to 22F

230 to 23F

Extension

2nd

7 - 1

7.1 System Configuration and Setting Conditions

Link parameters for second tier

200

(Empty)

400

Second

tier

B/W 0 FFF

(Empty)

First half of link parameters

L3 L1 L2 L3

10080 180

600

Latter half of link parameters

L1 L2 L3

500480 580

PROGRAMMING

(3) Wiring

Connect each optical fiber cable between OUT and IN as illustrated below. (OUT of local station No.3 must be connected to IN of the master station.)

( Section 5.4 Wiring)

Local station

No.3

Station

No.03

OUT IN

(4) Link parameter setting of the master station

Link parameters are set to the master station as shown below.

Local station

No.2

Station

No.02

Front

OUT IN

Local station

No.1

Station

No.01

Front Front

OUT IN

Figure 7.2 Wiring

Master station

Station

Front

OUT IN

No.00

OVERVIEW

SYSTEM

CONFIGURATION

SPECIFICATIONS

Figure 7.3 Link parameter setting of the master station

FUNCTIONS

PREPARATORY

PROCEDURES BEFORE

OPERATION

LINK DATA SEND/

RECEIVE PROCESSING

AND PROCESSING TIME

PROGRAMMING

7.1 System Configuration and Setting Conditions

TROUBLESHOOTING

7 - 2

PROGRAMMING

7.2 Program for Refresh and for Receiving LRDP/LWTP Instruction

This section explains the program for refresh and for receiving LRDP/LWTP instruction. Execute this program at the beginning of the sequence scan.

(1) Adding new data to a project

Newly add a program given in (3) and (4) to the project.

Figure 7.4 Adding new data to a project

(2) Setting PLC parameter

Select [PLC parameter] - [Program], and set the program for refresh and for receiving LRDP/LWTP instruction (program name: NET2_200) as the first sequence scan.

7 - 3

Figure 7.5 Setting PLC parameter

Mitsubishi Electronics A1SJ71AR23Q, A1SJ71AP23Q, A1SJ71AT23BQ User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

SAFETY PRECAUTIONS

CONDITIONS OF USE FOR THE PRODUCT

REVISIONS

INTRODUCTION

CONTENTS

ABOUT MANUALS

COMPLIANCE WITH THE EMC AND LOW VOLTAGE DIRECTIVES

HOW TO READ THIS MANUAL

GENERIC TERMS AND ABBRERVIATIONS

DEFINITIONS OF TERMINOLOGY

PACKING LIST

CHAPTER1 OVERVIEW

1.1 Features

CHAPTER2 SYSTEM CONFIGURATION

2.1 Overall System Configuration

2.2 Applicable Systems

2.2.1 Applicable system for Q series

2.2.2 Applicable system for L series

CHAPTER3 SPECIFICATIONS

3.1 Performance Specifications

3.2 Cable Specifications

3.2.1 Optical fiber cable

3.2.2 Coaxial cable

3.2.3 Shielded twisted pair cable

3.3 Function List

3.4 I/O Signal for Programmable Controller CPU

3.4.1 List of I/O signal

3.4.2 Details of I/O signal

3.5 Buffer Memory List

3.6 Details of Buffer Memory

3.6.1 Precautions

3.6.2 Presence or absence of refresh information table

3.6.3 Refresh information table

3.6.4 LRDP instruction receive request/receive result/work area

3.6.5 LWTP instruction receive request/receive result/work area

3.6.7 Special register (for link) (D9200 to D9255)

3.6.6 Special relay (for link) (M9200 to M9255)

3.6.8 Input (X0 to X7FF) and output (Y0 to Y7FF)

3.6.9 Link relay (B0 to BFFF)

3.6.10 Link register (W0 to WFFF)

CHAPTER4 FUNCTIONS

4.1 Cyclic Transmission Function

4.1.1 1 : n communication (B/W communication)

4.1.2 1 : 1 communication (X/Y communication)

4.2 Transient Transmission Function

4.3 RAS Functions

4.3.1 Automatic return function

4.3.2 Loopback function

4.3.3 Error detection function

5.1 Implementation and Installation

5.1.1 Handling precautions

5.2 Preparatory Procedures before Operation

5.3 Part Names and Settings

5.4 Wiring

5.4.1 Optical fiber cable

5.4.2 Coaxial cable

5.4.3 Shielded twisted pair cable

5.5 Self-diagnostic Test

5.5.1 Self-loopback test

5.5.2 Station-to-station test

5.5.3 Forward loop test/reverse loop test

6.1 Link Data Send/Receive Processing

6.1.1 Send/receive processing overview

6.1.2 Link refresh timing

6.1.3 Link data handling in the case of a communication error

6.2 Transmission Delay Time

6.2.1 Transmission delay time

6.2.2 Link refresh time

6.2.3 Link data send/receive time (Link scan)

CHAPTER7 PROGRAMMING

7.1 System Configuration and Setting Conditions

7.2 Program for Refresh and for Receiving LRDP/LWTP Instruction