Mitsubishi QJ71NT11B, QJ71LP21S-25, QJ71LP21-25, QJ71LP21G, QJ71LP21GE Reference Manual

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Q Corresponding MELSECNET/H Network System Reference Manual (PLC to PLC network)

-QJ71LP21

-QJ71LP21-25

-QJ71LP21S-25

-QJ71LP21G

-QJ71LP21GE

-QJ71BR11

-QJ71NT11B

• SAFETY PRECAUTIONS •

(Read these precautions before using this product.)

Before using this product, please read this manual and the relevant manuals carefully and pay full attention to safety to handle the product correctly. The instructions given in this manual are concerned with this product. For the safety instructions of the programmable controller system, please read the CPU module user's manual. In this manual, the safety precautions are classified into to levels: " WARNING" and " CAUTION".

! !

Under some circumstances, failure to observe the precautions given under " CAUTION" may lead to serious consequences. Observe the precautions of both levels because they are important for personal and system safety. Make sure that the end users read this manual and then keep the manual in a safe place for future reference.

[Design Precautions]

WARNING

• For operating status of each communication failure, refer to this manual. Incorrect output or malfunction due to a communication failure may result in an accident.

• If a coaxial cable is disconnected, this may destabilize the line, and a network communication error may occur in multiple stations. Provide an interlock circuit in the sequence program so that the system will operate safely even if the above error occurs. Failure to do so may result in an accident due to incorrect output or malfunction.

• When changing data of the running programmable controller from a peripheral connected to the CPU module or from a personal computer connected to an intelligent function module or special function module, configure an interlock circuit in the sequence program to ensure that the entire system will always operate safely. For program modification and operating status change, read relevant manuals carefully and ensure the safety before operation. Especially, in the case of a control from an external device to a remote programmable controller, immediate action cannot be taken for a problem on the programmable controller due to a communication failure. To prevent this, configure an interlock circuit in the sequence program, and determine corrective actions to be taken between the external device and CPU module in case of a communication failure.

A - 1 A - 1

[Design Precautions]

CAUTION

• Do not install the control lines or communication cables together with the main circuit lines or power cables. Keep a distance of 100mm or more between them. Failure to do so may result in malfunction due to noise.

[Installation Precautions]

CAUTION

• Use the programmable controller in the operating an environment that meets the general specifications given in the user's manual for the CPU module used. Failure to do so may result in electric shock, fire, malfunction, or damage to or deterioration of the product.

• To mount the module, while pressing the module mounting lever located in the lower part of module, fully insert the module fixing projection(s) into the hole(s) in the base unit press the module until it snaps into place. Incorrect mounting may cause malfunction, failure or drop of the module. When using the programmable controller in an environment of frequent vibrations, fix the module a screw. Tighten the screw within the specified torque range. Undertightening can cause drop of the screw, short circuit or malfunction. Overtightening can damage the screw and/or module, resulting in drop, short circuit, or malfunction.

• Shut off the external power supply for the system in all phases before mounting or removing the module. Failure to do so may result in damage to the product.

• Do not directly touch any conductive part of the module. Doing so can cause malfunction or failure of the module.

A - 2 A - 2

[Wiring Precautions]

WARNING

• Shut off the external power supply (all phases) used in the system before installation and wiring. Failure to do so may result in electric shock or damage to the product.

CAUTION

• Individually ground the FG terminal of the programmable controller with a ground resistance of 100 or less. Failure to do so may result in electric shock malfunction.

• Check the rated voltage and terminal layout before wiring to the terminal block for the external power supply, and connect the cable correctly. Connecting a cable to power supply with a different voltage rating or incorrect wiring may cause a fire or failure.

• Tighten the terminal screw within the specified torque range. Undertightening can cause drop of the screw, short circuit or malfunction. Overtightening can damage the screw and/or module, resulting in drop, short circuit, or malfunction.

• Properly solder the parts of a soldering-type coaxial cable connector. Incomplete soldering may result in malfunction.

• Crimp the parts of a crimping-type coaxial cable connector with proper force at a proper position. Failure to do so may cause drop of the cable or malfunction.

• Prevent foreign matter such as dust or wire chips from entering the module. Such foreign matter can cause a fire, failure, or malfunction.

• A protective film is attached to the top of the module to prevent foreign matter, such as wire chips, from entering the module during wiring. Do not remove this film during wiring. Remove it for heat dissipation before system operation.

• Place the cables in a duct or clamp them. Failure to do so may cause damage of the module or the cables due to accidental pull or unintentional shifting of the cables, or malfunctions due to poor contact of the cable.

• When disconnecting the communication and power cables from the module, do not pull the cable by the cable part. Loosen the screws of connector before disconnecting the cable. When disconnecting a cable connected to a terminal block, loosen the screws on the terminal block first before removing the cable. Failure to do so may result in damage to the module or cable or malfunction due to poor contact.

A - 3 A - 3

[Setup and Maintenance Precautions]

CAUTION

• Before performing online operations (especially, program modification, forced output, and operation status change) for the running CPU module in other station from GX Developer via MELSECNET/H, read relevant manuals carefully and ensure the safety.

• Do not disassemble or modify the module. Doing so may cause failure, malfunction, injury, or a fire.

• Use any radio communication device such as a cellular phone or a PHS (Personal Handy-phone System) more than 25cm (9.85 inches) away in all directions from the programmable controller. Failure to do so may cause malfunction.

• Shut off the external power supply for the system in all phases before mounting or removing the module. Failure to do so may cause the module to fail or malfunction.

• Do not touch any terminals while power is on. Doing so will cause electric shock.

• Shut external power supply for the system before cleaning the module or retightening the

terminal screws or module fixing screws. Failure to do so may cause the module to fail or malfunction. Undertightening can cause drop of the screw, short circuit or malfunction. Overtightening can damage the screw and/or module, resulting in drop, short circuit, or malfunction.

• After the firs use of the product, do not mount/remove the module to/from the base unit more than 50 times (IEC 61131-2 compliant) respectively. Exceeding the limit of 50 times may cause malfunction.

• Before handling the module, touch a grounded metal object to discharge the static electricity from the human body. Failure to do so may cause the module to fail or malfunction.

[Disposal Precautions]

CAUTION

• When disposing of this product, treat it as industrial waste.

A - 4 A - 4

• 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 - 5 A - 5

REVISIONS

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

Print Date Manual Number Revision

Dec., 1999 SH(NA)-080049-A First printing

Oct., 2000 SH(NA)-080049-B

Correction

Safety Precautions, Contents, About Manuals, About the Generic Terms and Abbreviations, Chapter 1, Section 1.1, 1.2, Chapter 2, Section 2.1.3, 2.1.4, 2.2.2, 3.1.1, 3.1.2, 3.2, 3.2.1, 3.2.2, 3.3, 3.3.1,

3.3.2, 3.3.3, 4.1, 4.2, 4.3.1, 4.3.2, 4.5, 4.5.1, 4.5.2, 4.5.3, 4.6.1, 4.6.2,

4.7, 4.7.1, 4.7.2, 4.8, 4.8.1, 4.8.2, 4.8.3, 4.8.4, Chapter 5, Section 5.1,

5.2, 5.2.3, 5.2.4, 5.2.5, 5.2.6, 5.5, 5.7, 5.7.1, 5.10, 6.1.2, 6.2, 6.2.1,

6.2.2, 6.2.3, 6.3, Chapter 7, Section 7.2, 7.3.1, 7.4, 7.4.1, 7.4.3, 7.4.5,

7.5, 7.5.3, 7.5.4, 7.5.5, 7.6, 7.7, 7.8, Chapter 8, Section 8.1, 8.1.1, 8.2,

8.2.1, 8.2.2, 8.2.3, 8.2.4, 8.2.5, 8.3, 8.4, Appendix 2.2, 3, 4

Addition

Product Configuration, Section 2.4, 2.5, 2.6, Appendix 1.2, Index

Deletion

Section 2.4

May, 2001 SH(NA)-080049-C

Module addition

QJ71LP21G, QJ71LP21GE

Correction

Safety Precautions, Contents, About the Generic Terms and Abbreviations, Section 1.1, 1.2, 2.4, 2.13, 2.1.4, 2.2, 2.2.1, 2.3, 3.1.1,

3.1.3, 3.2, 3.2.2, 3.3.2, 3.3.3, 3.3.4, 4.3.2, 4.4.2, 4.5.1, 4.5.2, 4.5.3,

4.6.2, 4.7.1, 4.7.2, Chapter 5, Section 5.1, 5.2.5, 5.2.6, 5.4, 5.6, 5.7.1,

5.7.2, 5.8, 5.9, 6.1.2, 6.2.1, 6.3, Chapter 7, Section 7.2, 7.3, 7.3.1,

7.4.1, 7.4.2, 7.4.5, 7.5, 7.9, 8.1.1, 8.1.4, 8.3, Appendix 2.1

Addition

Section 2.5

Section number changed

Section 2.5 2.6, 2.6 2.7

June, 2002 SH(NA)-080049-D

Module addition

QJ71LP21S-25

Correction

Safety Precautions, Contents, About Manuals, Product Configuration, Section 1.1, 1.2, 2.2, 3.1.1, 3.2.2, 3.3.2, 4.2, 5.2.1, 5.6, 6.2.1, 6.2.2, Chapter 7, Section 7.3, 7.3.2, 7.4.5, 8.3, Appendix 3, 4, Index

Apr., 2003 SH(NA)-080049-E

Correction

Safety Precautions, Contents, About Manuals, Section 1.2, 2.1.3, 2.2.2,

2.5, 3.1.1, 3.2.1, 3.2.2, 3.3.1, 3.3.3, Chapter 5, Section 5.2.1, 5.7, 5.7.1,

5.7.2, 5.8, 5.9, 6.1.2, 6.2, 6.4, 7.1, 7.4.2, 7.4.3, 7.4.4, 7.4.5, 7.5, 7.5.4,

7.8, 7.9, 8.1, 8.2, 8.2.1, 8.2.5, 8.3

A - 6 A - 6

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

Print Date Manual Number Revision

Jun., 2004 SH(NA)-080049-F · The contents of function version D were added.

· The entire manual was reviewed.

Oct., 2004 SH(NA)-080049-G

Mode addition

MELSECNET/H Extended Mode

Correction

Safety Precautions, Product Configuration, Section 1.1, 1.2, 2.1.2, 2.2,

2.2.2, 2.2.3, 3.1.1, 3.2.1, 3.3.2, 4.2, 4.3.3, 4.6.1, 4.6.2, 4.8.1, Chapter 5, Section 5.1, 5.4, 6.2.2, 6.2.3, 7.4.5, 7.6, 7.10.2, 8.1, 8.1.1, 8.1.2, 8.1.3,

8.2, 8.2.1, 8.2.7, 8.3, Appendix 1.1, 1.2, 3, 4, 5, INDEX

Addition

Section 8.2.5, 8.2.9, 8.2.10

Section number changed

Section 8.2.5 8.2.6, 8.2.6 8.2.7, 8.2.7

Oct., 2005 SH(NA)-080049-H

Correction

Safety Precautions, Conformation to the EMC Directive and Low Voltage Instruction, Section 1.1, 1.2, 2.1.2, 2.2, 2.2.1, 2.2.3, 3.1.3,

3.3.2, 4.2, 4.6.1, 4.7.1, 4.7.2, 4.8.1, Chapter 5, Section 5.1, 5.4, Chapter 6, 7, Section 7.3.1, 7.7, 7.10.2, 8.1.2, 8.1.3, 8.2, 8.2.5, 8.3, Appendix 1.1, 1.2, 3, 4, 5

Apr., 2006 SH(NA)-080049-I

Correction

Section 2.3, 3.1.2, 4.2, 6.3, 7.4.5, Appendix 4

Oct., 2007 SH(NA)-080049-J

Change of a term

"PLC" was changed to "programmable controller".

Correction

About the Generic Terms and Abbreviations, 1.2, 2.1.3, 2.1.4, 2.2, 2.3,

3.2.1, 3.3.2, 3.3.3, 4.2, 4.5.1, 4.5.2, 4.5.3, 4.6.1, 4.7.1, 4.7.2, Chapter 5,

5.1, 5.6, 5.7, 5.7.1, 5.7.2, 6.1.1, 6.2.2, 6.3, 6.4, 7.2, 7.4.5, 7.5.5, 7.10.2,

8.1, 8.2.1, 8.2.4, 8.3, Appendix 3, 4, 5

8.2.8

Addition

DEFINITIONS OF TERMINOLOGY

Jul., 2008 SH(NA)-080049-K

Correction

SAFETY PRECAUTIONS, Compliance with the EMC and Low Voltage Directives, About the Generic Terms and Abbreviations, DEFINITIONS OF TERMINOLOGY, Chapter 1, Section 2.1, 2.2, 3.1.1, 3.1.3, 3.2,

3.3.2 to 3.3.4, 4.2, 4.3.4, 4.6.2, 4.7.1, 4.7.2, Chapter 5, Section 5.1, 5.4,

5.6 to 5.9, 6.1.1, 6.3, Chapter 7, Section 7.2, 7.3, 7.4.1, 7.4.2, 7.4.5,

7.5, 7.5.5, 7.7 to 7.9, 7.10.2, 7.10.5, 7.10.7, 8.1, 8.3, Appendix 1.1, 2.1, 3, 4

A - 7 A - 7

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

Print Date Manual Number Revision

Jan., 2009 SH(NA)-080049-L

Mode addition

QJ71NT11B

Correction

SAFETY PRECAUTIONS, COMPLIANCE WITH THE EMC AND LOW VOLTAGE DIRECTIVES, GENERIC TERMS AND ABBREVIATIONS, PACKING LIST, Section 1.1 to 1.3, 2.1.1, 2.1.2, 2.1.4, 2.2, 2.2.3,

3.1.1 to 3.1.3, 3.2.2, 3.3.2, 3.3.3, 4.1 to 4.3, 4.5, 4.5.1 to 4.5.3, 4.7.1,

4.7.2, 4.8, 4.8.2, Chapter 5, Section 5.1, 5.2.5, 5.4, 5.7.1, 6.1.1, 6.4,

7.1 to 7.3, 7.4.1, 7.4.2, 7.4.5, 7.5.5, 7.9, 7.10.2, 8.2, 8.2.1 to 8.2.4, 8.3,

8.4, Appendix 1.1, 1.2, 3, 4, INDEX

Addition

Section 3.1.4, 3.1.5, 4.2.1 to 4.2.3, 4.6.3, 4.6.4, 5.2.6, 8.2.6, Appendix 5

Section number changed

Section 4.3.3 4.3.2, 4.3.4 4.3.3, 4.3.5 4.3.4, 5.2.6 5.2.7,

8.2.6 8.2.7, 8.2.7 8.2.8, 8.2.8 8.2.9, 8.2.9 8.2.10,

8.2.10 8.2.11, Appendix 5 6

Aug., 2009 SH(NA)-080049-M

Correction

Section 1.3, 2.2, 2.3, Chapter 8, Appendix 1.2

Addition

Section 8.3.1

Sep., 2010 SH(NA)-080049-N

May, 2012 SH(NA)-080049-O

Section number changed

Section 8.3(4) 8.3.2

Correction

GENERIC TERMS AND ABBREVIATIONS, Section 1.3, 2.2.1, 2.3,

4.2.1, 4.2.2, 4.2.3, 4.3.1, 5.8, 6.4, 7.4.5, 7.5.6, 8.2.4, 8.2.8, 8.2.10,

8.3.2, Appendix 4, 6

Addition

CONDITIONS OF USE FOR THE PRODUCT

Correction

SAFETY PRECAUTIONS, COMPLIANCE WITH THE EMC AND LOW VOLTAGE DIRECTIVES, GENERIC TERMS AND ABBREVIATIONS, Section 2.2, 2.3, 3.1.3, 3.1.4, 3.2.2, 3.3.1, 4.2.1, 4.6.2, 5.7, 6.1.1, 6.3,

7.4.5, 7.10.2, 8.3.2, Appendix 3, 6

A - 8 A - 8

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

Print Date Manual Number Revision

Sep., 2016 SH(NA)-080049-P

Correction

GENERIC TERMS AND ABBREVIATIONS, DEFINITIONS OF TERMINOLOGY, Section 1.3, 2.1.4, 2.2, 2.3, 3.1.1, 3.1.2, 3.1.4, 3.3.1,

3.3.2, 4.2.1, 4.2.3, 4.3.1, 4.6.3, Chapter 5, Section 5.1, 5.4, 6.1.1, 6.3,

6.4, 7.4.2, 7.4.5, 8.2, Appendix 1.1, 2.1, 3, 4, 5, 6

Nov., 2017 SH(NA)-080049-Q

Correction

Section 7.7

Sep., 2019 SH(NA)-080049-R

Correction

GENERIC TERMS AND ABBREVIATIONS, Section 2.2, 8.1.2, Appendix 1.2

Addition

Section 8.2.4

Section number changed

Section 8.2.4 to Section 8.2.11 Section 8.2.5 to Section 8.2.12

Japanese Manual Version SH-080026-X

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.

A - 9 A - 9

INTRODUCTION

Thank you for purchasing the Mitsubishi Electric MELSEC-Q series programmable controller. Before using the product, please read this manual carefully to develop full familiarity with the functions and performance of the Q series programmable controller to handle the product correctly. Please forward a copy of this manual to the end user.

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

CONDITIONS OF USE FOR THE PRODUCT ........................................................................................... A- 5

REVISIONS .................................................................................................................................................. A- 6

CONTENTS .................................................................................................................................................. A- 10

MANUALS .................................................................................................................................................... A- 15

COMPLIANCE WITH EMC AND LOW VOLTAGE DIRECTIVES ............................................................. A- 15

GENERIC TERMS AND ABBREVIATIONS ............................................................................................... A- 16

DEFINITIONS OF TERMINOLOGY ............................................................................................................ A- 18

PACKING LIST ............................................................................................................................................ A- 19

1 OVERVIEW 1- 1 to 1-14

1.1 Overview ................................................................................................................................................ 1- 1

1.2 Features ................................................................................................................................................. 1- 4

1.3 Symbols Used in This Manual ............................................................................................................... 1- 14

2 SYSTEM CONFIGURATION 2- 1 to 2-19

2.1 MELSECNET/H Network Configurations .............................................................................................. 2- 1

2.1.1 Single network system .................................................................................................................... 2- 1

2.1.2 Redundant system (Redundant CPU) ............................................................................................ 2- 3

2.1.3 Simple dual-structured system (High Performance model QCPU and Process CPU) ................. 2- 4

2.1.4 Multiple network system (High Performance model QCPU, Process CPU, Redundant CPU,

and Universal model QCPU) .......................................................................................................... 2- 5

2.2 Applicable Systems ................................................................................................................................ 2- 6

2.2.1 Precautions when using link dedicated instructions ....................................................................... 2- 9

2.2.2 Precautions when using network modules in the multiple CPU system ....................................... 2- 11

2.2.3 List of functions for each CPU module ........................................................................................... 2- 17

2.3 Checking Serial Number and Function Version .................................................................................... 2- 18

3 SPECIFICATIONS 3- 1 to 3-52

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

3.1.1 Performance specifications ............................................................................................................. 3- 1

3.1.2 Optical fiber cable specifications..................................................................................................... 3- 5

3.1.3 Coaxial cable specifications ............................................................................................................ 3- 6

3.1.4 Shielded twisted pair cable specifications ...................................................................................... 3- 11

3.1.5 CC-Link Ver. 1.10-compatible cable specifications ........................................................................ 3- 13

3.2 Function Specifications .......................................................................................................................... 3- 14

3.2.1 Cyclic transmission function (periodical communication) .............................................................. 3- 15

3.2.2 RAS function .................................................................................................................................... 3- 18

3.3 Specifications of the Link Data Sending/Receiving Processing Time .................................................. 3- 29

3.3.1 Link data sending/receiving processing ......................................................................................... 3- 29

3.3.2 How to calculate the transmission delay time ................................................................................ 3- 33

A - 10 A - 10

3.3.3 Reducing the link refresh time ........................................................................................................ 3- 47

3.3.4 Reduction of the link scan time ....................................................................................................... 3- 52

3.3.5 Control station shift time .................................................................................................................. 3- 52

4 SETUP AND PROCEDURES BEFORE STARTING THE OPERATION 4- 1 to 4-45

4.1 Procedures Before Starting the Operation ............................................................................................ 4- 1

4.2 Part Names and Settings ....................................................................................................................... 4- 2

4.2.1 QJ71LP21, QJ71LP21-25, QJ71LP21S-25, QJ71LP21G, QJ71LP21GE .................................... 4- 2

4.2.2 QJ71BR11 ....................................................................................................................................... 4- 5

4.2.3 QJ71NT11B ..................................................................................................................................... 4- 7

4.3 Loading and Installation ......................................................................................................................... 4- 8

4.3.1 Handling precautions ...................................................................................................................... 4- 8

4.3.2 Installing and uninstalling the module ............................................................................................. 4- 10

4.3.3 Stopping the CPU module (unintentional output prevention) ........................................................ 4- 11

4.3.4 Checking the input power supply voltage ....................................................................................... 4- 11

4.4 Powering On .......................................................................................................................................... 4- 11

4.4.1 Checking the on status of the POWER LED of the power supply module .................................... 4- 11

4.4.2 Checking the on status of the RUN LED of the network module .................................................. 4- 11

4.5 Standalone Check of the Network Module (Offline Tests) ................................................................... 4- 12

4.5.1 Self-loopback test ............................................................................................................................ 4- 13

4.5.2 Internal self-loopback test ............................................................................................................... 4- 15

4.5.3 Hardware test .................................................................................................................................. 4- 17

4.6 Cable Connection .................................................................................................................................. 4- 19

4.6.1 Optical loop system ......................................................................................................................... 4- 19

4.6.2 Coaxial bus system ......................................................................................................................... 4- 22

4.6.3 Twisted bus system (when using a shielded twisted pair cable) ................................................... 4- 27

4.6.4 Twisted bus system (when using CC-Link Ver. 1.10-compatible cable) ....................................... 4- 29

4.7 Offline Tests from GX Developer .......................................................................................................... 4- 30

4.7.1 Station-to-station test ...................................................................................................................... 4- 30

4.7.2

Forward loop/reverse loop test (optical loop system only) ............................................................ 4- 36

4.8 Network Diagnostics from GX Developer (Online Tests) ..................................................................... 4- 41

4.8.1 Loop test (optical loop system only) ............................................................................................... 4- 42

4.8.2 Setup confirmation test (optical loop, coaxial bus system only) .................................................... 4- 43

4.8.3 Station order check test (optical loop system only) ........................................................................ 4- 44

4.8.4 Communication test......................................................................................................................... 4- 45

5 PARAMETER SETTINGS 5- 1 to 5-42

5.1 Setting the Number of Modules (Network Type) .................................................................................. 5- 7

5.2 Network Settings .................................................................................................................................... 5- 9

5.2.1 Starting I/O No. ................................................................................................................................ 5- 9

5.2.2 Network No. ..................................................................................................................................... 5- 9

5.2.3 Total stations ................................................................................................................................... 5- 10

5.2.4 Group No. ........................................................................................................................................ 5- 10

5.2.5 Mode ................................................................................................................................................ 5- 11

5.2.6 Communication speed setting (twisted bus system only) .............................................................. 5- 12

A - 11 A - 11

5.2.7 Example of parameter settings ....................................................................................................... 5- 13

5.3 Common Parameters (Network Range Assignment Screen) .............................................................. 5- 14

5.3.1 Send range for each station (LB/LW settings) ............................................................................... 5- 14

5.3.2 Send range for each station (LX/LY settings) ................................................................................ 5- 15

5.3.3 Specification of the I/O master station ............................................................................................ 5- 16

5.3.4 Specification of the reserved station ............................................................................................... 5- 16

5.3.5 Pairing setting .................................................................................................................................. 5- 16

5.4 Supplementary Settings ......................................................................................................................... 5- 17

5.5 Control Station Return Setting ............................................................................................................... 5- 20

5.6 Station Inherent Parameters (High Performance model QCPU, Process CPU, Redundant CPU,

and Universal model QCPU) ................................................................................................................. 5- 21

5.7 Refresh Parameters ............................................................................................................................... 5- 25

5.7.1 Concept of the link refreshing ......................................................................................................... 5- 28

5.7.2 How to set the refresh parameters ................................................................................................. 5- 30

5.8 Valid Module During Other Station Access ........................................................................................... 5- 39

5.9 Standby Station Compatible Module (High Performance model QCPU and Process CPU) .............. 5- 40

5.10 Writing Parameters to the CPU ........................................................................................................... 5- 42

6 PROGRAMMING 6- 1 to 6-31

6.1 Programming Precautions ..................................................................................................................... 6- 1

6.1.1 Interlock related signals .................................................................................................................. 6- 1

6.1.2 Program example ............................................................................................................................ 6- 4

6.2 Cyclic Transmission ............................................................................................................................... 6- 5

6.2.1 32-bit data assurance ...................................................................................................................... 6- 5

6.2.2 Station-based block data assurance for cyclic data ....................................................................... 6- 7

6.2.3 Interlock program example ............................................................................................................. 6- 8

6.3 Link Dedicated Instruction List ............................................................................................................... 6- 9

6.4 Using the Link Special Relays (SB)/Link Special Registers (SW) ....................................................... 6- 13

7 APPLICATION FUNCTIONS 7- 1 to 7-160

7.1 Direct Access to the Link Devices ......................................................................................................... 7- 2

7.2 Inter-Link Data Transfer Function (High Performance model QCPU, Process CPU,

Redundant CPU, and Universal model QCPU) .................................................................................... 7- 6

7.3 Low-Speed Cyclic Transmission Function (High Performance model QCPU, Process CPU,

Redundant CPU, and Universal model QCPU) .................................................................................... 7- 9

7.3.1 Send range settings ........................................................................................................................ 7- 10

7.3.2 Send timing ...................................................................................................................................... 7- 11

7.3.3 Startup ............................................................................................................................................. 7- 14

7.4 Transient Transmission Function (Non-Periodical Communication) .................................................... 7- 16

7.4.1 Communication function.................................................................................................................. 7- 17

7.4.2 Routing function ............................................................................................................................... 7- 20

7.4.3 Group function ................................................................................................................................. 7- 27

7.4.4 Message sending function using the logical channel numbers ..................................................... 7- 28

7.4.5 Programming ................................................................................................................................... 7- 30

7.4.5 (1) Data sending/receiving (JP/GP.SEND, JP/GP.RECV) ............................................................ 7- 36

7.4.5 (2) Reading from/writing to word devices of other stations (JP/GP.READ, JP/GP.SREAD,

JP/GP.WRITE, JP/GP.SWRITE) .................................................................................................... 7- 53

A - 12 A - 12

7.4.5 (3) Requesting transient transmission to other stations (J(P)/G(P).REQ) .................................... 7- 72

7.4.5 (4) Reading/writing word devices of other stations (J(P).ZNRD, J(P).ZNWR) .............................. 7- 82

7.4.5 (5) Remote RUN/Remote STOP (Z(P).RRUN, Z(P).RSTOP) ....................................................... 7- 91

7.4.5 (6) Reading and writing clock data of other station CPU modules (Z(P).RTMRD, Z(P).RTMWR)

......................................................................................................................................................... 7- 100

7.4.6 Setting the clock to stations on a network with GX Developer ...................................................... 7- 109

7.5 Starting the Interrupt Sequence Program ............................................................................................. 7- 110

7.5.1 Interrupt setting parameters ............................................................................................................ 7- 111

7.5.2 Interrupts using the RECVS instruction .......................................................................................... 7- 113

7.5.3 Interrupts by the link devices (LB/LW/LX) for cyclic transmission ................................................. 7- 114

7.5.4 Interrupts by the link special device (SB/SW) ................................................................................ 7- 116

7.5.5 Message reception "one scan completion" instruction (Z.RECVS) ............................................... 7- 117

7.5.6 Application example ........................................................................................................................ 7- 121

7.6 Multiplex Transmission Function (Optical Loop System) ..................................................................... 7- 123

7.7 Simple Dual-Structured Network (High Performance model QCPU and Process CPU) .................... 7- 124

7.8 Stopping/Restarting the Cyclic Transmission and Stopping Link Refreshing (Network Test) ............ 7- 129

7.9 Increasing the Number of Send Points by Installing Multiple Modules with the Same Network (High Performance model QCPU, Process CPU, Redundant CPU, and Universal model QCPU) ... 7- 132

7.10 Configuring a Network with a Redundant System .............................................................................. 7- 134

7.10.1 Outline of the redundant system operation .................................................................................. 7- 134

7.10.2 Precautions for network configuration including a redundant system ......................................... 7- 137

7.10.3 Pairing setting in a redundant system .......................................................................................... 7- 145

7.10.4 Redundant settings in a redundant system ..................................................................................

7.10.5 System switching request to the control system CPU ................................................................. 7- 150

7.10.6 Function for returning to control station in a redundant system .................................................. 7- 152

7.10.7 Data retention time for system switching ...................................................................................... 7- 153

7.10.8 Routing via a redundant system ................................................................................................... 7- 159

7- 149

8 TROUBLESHOOTING 8- 1 to 8-53

8.1 Network Diagnostics (Network Monitor) ................................................................................................ 8- 2

8.1.1 Host information .............................................................................................................................. 8- 5

8.1.2 Other station information ................................................................................................................. 8- 7

8.1.3 Network monitor details ................................................................................................................... 8- 11

8.1.4 Error history monitor ........................................................................................................................ 8- 15

8.2 Troubleshooting ..................................................................................................................................... 8- 18

8.2.1 Items to be checked first ................................................................................................................. 8- 23

8.2.2 Data link failure on the entire system ............................................................................................. 8- 24

8.2.3 Data link failure caused by reset or power-off of each station ....................................................... 8- 24

8.2.4 Cyclic data is 0 caused by reset or power-on of each station ....................................................... 8- 26

8.2.5 Data link failure of a specific station ............................................................................................... 8- 27

8.2.6 Data link failure in MELSECNET/H Extended mode ..................................................................... 8- 27

8.2.7 Data link failure in MELSECNET/H twisted bus system ................................................................ 8- 28

8.2.8 Data link in a redundant system ..................................................................................................... 8- 28

8.2.9 Send/received data failure .............................................................................................................. 8- 29

8.2.10 Link dedicated instruction not complete ....................................................................................... 8- 30

8.2.11 Checking online for reverse optical fiber cable connection ......................................................... 8- 31

8.2.12 When different network types exist in the same network ............................................................ 8- 33

8.3 Error Codes ............................................................................................................................................ 8- 34

8.3.1 How to check error codes ............................................................................................................... 8- 34

A - 13 A - 13

8.3.2 Error code list................................................................................................................................... 8- 39

8.4 H/W Information ..................................................................................................................................... 8- 49

APPENDICES App- 1 to App-42

Appendix 1 Comparison of Network Module Specifications, and Compatibility ................................... App- 1

Appendix 1.1 List of comparison between MELSECNET/H and MELSECNET/H

Extended mode and MELSECNET/10 mode specifications ....................................... App- 1

Appendix 1.2 Upgraded functions of the network module ................................................................. App- 3

Appendix 2 Differences between the AJ71QLP21/AJ71QLP21G/AJ71QBR11, the A1SJ71QLP21/

A1SJ71QBR11, and the QJ71LP21/QJ71LP21-25/QJ71LP21G/ QJ71BR11 ................. App- 4

Appendix 2.1 Differences in LED displays and switch settings ......................................................... App- 4

Appendix 2.2 Precautions when replacing the AJ71QLP21/AJ71QLP21G/AJ71QBR11 and the

A1SJ71QLP21/A1SJ71QBR11 with the QJ71LP21/QJ71LP21-25/ QJ71LP21G/

QJ71BR11 ..................................................................................................................... App- 5

Appendix 3 Link Special Relay (SB) List ................................................................................................ App- 6

Appendix 4 Link Special Register (SW) List ........................................................................................... App- 18

Appendix 5 Screwdriver .......................................................................................................................... App- 37

Appendix 6 External Dimensions ............................................................................................................ App- 38

INDEX Index- 1 to Index- 3

A - 14 A - 14

MANUALS

The following manuals are also relevant to this product. Order each manual as needed, referring to the following list.

Relevant manuals

Manual name

Q corresponding MELSECNET/H Network System Reference Manual (Remote I/O network)

Specifications, setup and procedures before starting the operation, parameter setting, programming and

troubleshooting of the remote I/O network of the MELSECNET/H network system. (Sold separately)

Type MELSECNET/10 Network system (PLC to PLC network) Reference Manual

System configuration, performance, specifications and programming of MELSECNET/10 network system

(PLC to PLC network). (Sold separately)

For QnA/Q4AR MELSECNET/10 Network System Reference Manual

System configuration, performance, specifications and programming of MELSECNET/10 network system

(PLC to PLC network). (Sold separately)

COMPLIANCE WITH EMC AND LOW VOLTAGE DIRECTIVES

(1) Method of ensuring compliance

To ensure that Mitsubishi Electric 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.

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

Manual number

(Model code)

SH-080124

(13JF96)

IB-66440 (13JE33)

IB-66690 (13JF78)

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

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

(2) Additional measures

(a) When using QJ71LP21 and QJ71NT11B

No additional measures are necessary for the compliance of this product with EMC and Low Voltage Directives.

(b) When using QJ71BR11

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

A - 15 A - 15

GENERIC TERMS AND ABBREVIATIONS

Generic term/abbreviation Description of generic term/abbreviation

Abbreviation for the QJ71LP21, QJ71LP21-25, QJ71LP21S-25, QJ71LP21G, and QJ71LP21GE

QJ71LP21

QJ71BR11 Abbreviation for the QJ71BR11 MELSECNET/H network module

QJ71NT11B Abbreviation for the QJ71NT11B MELSECNET/H network module

Network modules Generic term for the QJ71LP21, QJ71BR11, and QJ71NT11B

CC-Link IE Controller Network

module

CC-Link IE Field Network module Abbreviation for the QJ71GF11-T2 CC-Link IE Field Network master/local modules

MELSECNET/H Abbreviation for the Q corresponding MELSECNET/H network system

MELSECNET/10 Abbreviation for the AnU and QnA/Q4AR corresponding MELSECNET/10 network system

QCPU

Basic model QCPU Generic term for the Q00JCPU, Q00CPU, and Q01CPU

High Performance model QCPU Generic term for the Q02CPU, Q02HCPU, Q06HCPU, Q12HCPU, and Q25HCPU

Process CPU Generic term for the Q02PHCPU, Q06PHCPU, Q12PHCPU, and Q25PHCPU

Redundant CPU Generic term for the Q12PRHCPU and Q25PRHCPU

Universal model QCPU

Built-in Ethernet port QCPU

Safety CPU Generic term for the QS001CPU

C Controller module

Control CPU

System A CPU

System B CPU

Control system CPU A CPU module that controls operations in a redundant system

Standby system CPU A CPU module that stands by in case the control system fails in a redundant system

GX Developer

GX Works2 Generic product name for SWnDND-GXW2 and SWnDNC-GXW2 (n: version)

CC-Link Ver. 1.10-compatible cable Abbreviation for the CC-Link Version. 1.10-compatible dedicated cable

MELSECNET/H network modules. However, QJ71LP21, QJ71LP21-25, QJ71LP21S-25,

QJ71LP21G, and QJ71LP21GE are used in this manual to indicate special machine types

Abbreviation for the QJ71GP21-SX and QJ71GP21S-SX CC-Link IE Controller Network modules

Generic term for the Basic model QCPU, High Performance model QCPU, Process CPU,

Redundant CPU, and Universal model QCPU

Generic term for the Q00UJCPU, Q00UCPU, Q01UCPU, Q02UCPU, Q03UDCPU, Q03UDVCPU,

Q03UDECPU, Q04UDHCPU, Q04UDVCPU, Q04UDEHCPU, Q06UDHCPU, Q06UDVCPU,

Q06UDEHCPU, Q10UDHCPU, Q10UDEHCPU, Q13UDHCPU, Q13UDVCPU, Q13UDEHCPU,

Q20UDHCPU, Q20UDEHCPU, Q26UDHCPU, Q26UDVCPU, Q26UDEHCPU, Q50UDEHCPU, and

Q100UDEHCPU

Generic term for the Q03UDVCPU, Q03UDECPU, Q04UDVCPU, Q04UDEHCPU, Q06UDVCPU,

Q06UDEHCPU, Q10UDEHCPU, Q13UDVCPU, Q13UDEHCPU, Q20UDEHCPU, Q26UDVCPU,

Q26UDEHCPU, Q50UDEHCPU, and Q100UDEHCPU

Generic term for the C Controller modules: Q06CCPU-V, Q06CCPU-V-B, Q12DCCPU-V,

Q24DHCCPU-V, Q24DHCCPU-VG, Q24DHCCPU-LS, and Q26DHCCPU-LS

A CPU module that controls connected I/O modules and intelligent function modules. In a multiple

CPU system, there are multiple CPU modules and each connected module can be controlled by a

different CPU module.

A CPU module where the system A connector of a tracking cable is connected in a redundant

system

A CPU module where the system B connector of a tracking cable is connected in a redundant

system

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

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

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

A - 16 A - 16

Generic term/abbreviation Description of generic term/abbreviation

SEND Abbreviation for JP.SEND and GP.SEND

RECV Abbreviation for JP.RECV and GP.RECV

READ Abbreviation for JP.READ and GP.READ

SREAD Abbreviation for JP.SREAD and GP.SREAD

WRITE Abbreviation for JP.WRITE and GP.WRITE

SWRITE Abbreviation for JP.SWRITE and GP.SWRITE

REQ Abbreviation for J.REQ, JP.REQ, G.REQ and GP.REQ

ZNRD Abbreviation for J.ZNRD and JP.ZNRD

ZNWR Abbreviation for J.ZNWR and JP.ZNWR

RRUN Abbreviation for Z.RRUN and ZP.RRUN

RSTOP Abbreviation for Z.RSTOP and ZP.RSTOP

RTMRD Abbreviation for Z.RTMRD and ZP.RTMRD

RTMWR Abbreviation for Z.RTMWR and ZP.RTMWR

RECVS Abbreviation for Z.RECVS

A - 17 A - 17

DEFINITIONS OF TERMINOLOGY

Term Description

Cyclic transmission

Transient transmission

Link dedicated instruction Dedicated instruction used for transient transmission.

RAS

Control station

Normal station

Reserved station

Relay station

Reconnection Processing of restarting data link when a faulty station becomes normal.

Disconnection Processing of stopping data link when a data link error occurs.

Device Devices (X, Y, M, D, etc.) that are contained in a CPU module.

Link Device Devices (LB/LW/LX/LY) that are contained in a network module.

Link scan time

Link refresh

Buffer memory

Baton pass

Control station shift time

Group No.

A function by which data are periodically exchanged among stations on the network using

link devices

A function of communication with another station, which is used when requested by a

dedicated instruction or GX Developer

Abbreviation for Reliability, Availability, and Serviceability.

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

Only one station that controls the network to which it is connected.

Each station's send range for cyclic transmission is assigned to the control station.

Station that performs cyclic transmission according to the range assignment of the control

station.

Station that is not actually connected to the network.

It must be included in the total number of stations in the network, since it is to be connected

in the future.

A station that includes two or more network modules. Data are passed through this station

to stations on other networks.

Time required for data of each station to be sent in order and to make one rotation in the

network.

The link scan time changes depending on the data volume or transient transmission

request.

Link scans are performed "asynchronously" with sequence scans of the CPU module.

Processing of data transfer between link devices of the network module and CPU module

devices.

Link refresh is performed in "END processing" of the sequence scan of the CPU module.

Memory area in an intelligent function module, in which data are temporarily stored.

The network module does not have any buffer memory area that is offered to the user.

A control mechanism in which transmission right (token) is passed around the network for

data transmission.

Time taken from when the control station went down due to a reason such as power-off

until data link is started by the sub-control station.

Number that is assigned for transient transmission to any given stations.

By specifying a group of stations as transient transmission target, data can be sent to the

stations of the same group No.

A - 18 A - 18

PACKING LIST

Model name Part name Quantity

QJ71LP21*1

QJ71LP21-25

QJ71LP21S-25

QJ71LP21G

QJ71LP21GE

QJ71BR11

QJ71NT11B

QJ71LP21 MELSECNET/H Network Module

(optical loop type)

QJ71LP21-25 MELSECNET/H Network Module

(optical loop type)

QJ71LP21S-25 MELSECNET/H Network Module

(optical loop type, with external power supply function)

QJ71LP21G MELSECNET/H Network Module

(optical loop type)

QJ71LP21GE MELSECNET/H Network Module

(optical loop type)

QJ71BR11 MELSECNET/H Network Module

(coaxial bus type)

F-type connector (A6RCON-F) 1

QJ71NT11B MELSECNET/H Network Module

(twisted bus type)

Terminating resistor 110 , 1/2W (brown, brown, brown) 1

*1: The QJ71LP21 is discontinued in October, 2000.

REMARKS

For the coaxial bus system, terminating resistors (75 ) are required in the network terminal stations. Terminating resistors are not supplied with the QJ71BR11; they must be purchased separately. For a list of the model names and how to use the terminating resistors, refer to Section 4.6.2.

A - 19 A - 19

1 OVERVIEW

MELSEC-Q

1.1 Overview

The MELSECNET/H network system includes a PLC to PLC network for communicating between the control station and normal stations, and a remote I/O network for communicating between the remote master station and remote I/O stations. This manual is used for configuring PLC to PLC networks on MELSECNET/H network systems (hereinafter abbreviated as MESECNET/H.) When configuring a remote I/O network using MELSECNET/H, refer to Q corresponding MELSECNET/H Network System Reference Manual (Remote I/O network).

REMARKS

Networks known as MELSECNET/10H are hereinafter abbreviated as MELSECNET/H.

The PLC to PLC network system of MELSECNET/H provides more functionality, higher processing speed and more capacity than the conventional PLC to PLC network system of MELSECNET/10 network system. In addition, in pursuit of the maximum ease of use of the MELSECNET/10 network system, the FA system can be networked easily by combining with GX Developer. The MELSECNET/H system supports the MELSECNET/H and MELSECNET/H Extended modes (high functionality and high-speed mode) and the MELSECNET/10 mode (functional and performance compatibility mode) to achieve the network performance improvement and upward compatibility of MELSECNET/10. Unless otherwise categorized, this is abbreviated as MELSECNET/H for explanatory purposes in this manual.

1 - 1 1 - 1

1 OVERVIEW

GX Developer

Q25HCPU

MELSEC-Q

Control station (MELSECNET/10 mode)

Control station (MELSECNET/H mode)

Remote master station

MELSECNET/10

Q25HCPU Normal station

QnACPU

MELSECNET/H (25Mbps) PLC to PLC network

Q25HCPU

PLC to PLC network

Normal station

AnUCPU

Normal station

Q25HCPU

REMARKS

MELSECNET/H (25Mbps) remote I/O network

MELSECNET/H (10Mbps) PLC to PLC network

Q25HCPU

Normal station

Remote I/O station

This manual is written assuming that MELSECNET/H is used in the MELSECNET/H or MELSECNET/H Extended mode. Thus, if MELSECNET/H is to be used in the MELSECNET/10 mode, please refer to the "For QnA/Q4AR MELSECNET/10 Network System Reference Manual".

POINT

(1) Select a QCPU as a programmable controller of the MELSECNET/H for PLC

to PLC network system.

(2) When any of the conventional series QnA, AnU and ACPUs exist in the same

network, select the MELSEC NET/10 mode, which is compatible with the MELSECNET/10.

(3) Set the control station and normal stations within the same network to the

same network type. Stations of different network types cannot be used together within the same network.

1 - 2 1 - 2

1 OVERVIEW

module

QCPU

AnUCPU MELSECNET/10

QnACPU MELSECNET/10

MELSEC-Q

The table below shows the CPU modules that can be combined for use on each network.

CPU

Type of networks that can

be used with CPU

MELSECNET/H

(10 Mbps)

MELSECNET/H

(25 Mbps)

MELSECNET/H

(Twisted bus)

MELSECNET/10 MELSECNET/H

PLC to PLC network PLC to PLC network

(MESLECNET/10 mode)

Network to be connected

(MESLECNET/H mode,

MELSECNET/H Extended mode)

: Use possible : Use not possible

REMARKS

What is network type? The network type is a parameter set for specifying the network where the network module is used. Set the network type of the network module in the Network parameter of GX Developer. There are the following network types.

Network type Description

MELSECNET/H mode Set this mode when all CPUs within the network are QCPUs.

The maximum number of link points per station has been increased MELSECNET/H Extended mode

MELSECNET/10 mode

compared with the MELSECNET/H mode.

In excess of 2000 bytes, a maximum of 35840 bytes can be set.

Set this mode when the system uses many link points per station.

This mode is used to operate the network module on a

MELSECNET/10 network where the QnA/AnU exists.

1 - 3 1 - 3

1 OVERVIEW

1.2 Features

The MELSECNET/H is designed to provide higher processing speed, more capacity, and more functionality while maintaining the connectivity with the MELSECNET/10; it is easier to use than ever in combination with GX Developer. Furthermore, the MELSECNET/H has the following features that were not available with the conventional MELSECNET (II) and MELSECNET/B data link systems.

(1) Achievement of a high-speed communication system

(a) The MELSECNET/H enables high-speed communications with 25Mbps

and 10Mbps communication speeds.

Item

Link device transfer 8 16 64 SB/SW transfer 1 for each

Basic model QCPU

Safety CPU

Refresh range

Communication speeds vary depending on the network system.

Network system Communication speed

Optical loop 10Mbps or 25Mbps 1

Coaxial bus 10Mbps

Twisted bus 156kbps to 10Mbps

1: QJ71LP21-25 and QJ71LP21S-25 only

(b) The link scan time has become even faster through the use of processors

specifically designed for linking.

By subdividing ranges refresh parameter ranges, refreshing of the areas not used for the sequence program can be eliminated and the refresh time can be reduced by refreshing only those required. (Refer to Section 5.7 "Refresh Parameters.") The number of refresh parameter settings per module is shown below.

Number of settings

Q00UJCPU

Q00UCPU Q01UCPU

Universal model QCPU other than listed in the left column.

High Performance model QCPU

Process CPU

Redundant CPU

Also, because the bus speed between a QCPU and a network module has been improved, the refresh time has been reduced.

QCPU

device (B)

Network module

link device (LB)

Station

No. 1

(Host)

Station

No. 2

MELSEC-Q

Each station's total send range

Station

No. 3

High-speed bus

Fragmentation

(d) The optical loop system enables even faster levels of data communication

with multiplex transmission (refer to Multiplex Transmission Function in section 7.6.)

1 - 4 1 - 4

1 OVERVIEW

MELSEC-Q

(2) Large-scale and flexible system configuration

(a) The link device has a larger capacity: 16384 points for the link relay (LB)

and 16384 points for the link register (LW). (Refer to Section 3.1.1)

(b) The maximum number of link points per station has been increased.

By selecting the network type, the maximum number of link points per station can be increased.

1) MELSECNET/H Extended mode By selecting the MELSECNET/H Extended mode as the network type, the maximum number of link points per station can be set up to 35840 bytes in excess of 2000 bytes. It is not necessary to install multiple network modules for a single CPU module to increase the number of transmission points.

2) MELSECNET/H mode

1 By selecting the MELSECNET/H mode as the network type, the maximum number of link points per station can be set up to 2000 bytes. Furthermore, by installing multiple network modules with the same network number for the same CPU module, the link points of "number of modules

maximum number of link points per station" can be sent. (High Performance model QCPU, Process CPU, Redundant CPU, and Universal model QCPU) (Refer to Section 7.9 "Increasing the Number of Send Points by Installing Multiple Modules Having the Same Network Number.")

1: The link scan time varies depending on the network type.

Refer to Section 3.3.2 for details.

the MELSECNET/H network system (SEND, RECV, RECVS, READ, SREAD, WRITE, SWRITE) enable a maximum of 960 words of data to be transmitted and received (refer to Programming in section 7.4.5.)

(d) A system can be expanded to contain a maximum of 239 networks. (Refer

to Section 2.1.4, "A Network System Containing Multiple Networks.")

(e) By using the inter-link data transfer function, data (LB/LW) can be transferred

to another network without creating a sequence program. (High Performance model QCPU, Process CPU, Redundant CPU, and Universal model QCPU) (Refer to Section 7.2, "Inter-link Data Transfer Function.")

Q25HCPU

Network

module 1

LB LB

Network

module 2

Inter-link data

Q25H

CPU

Network

module

Data of network No. 2

Network No. 1

3FFF

transfer

3FFF

Data of network No. 1

Q25H

CPU

Network No. 2

Network

module

1 - 5 1 - 5

1 OVERVIEW

GX Developer

Transient transmission possible.

Q25H

CPU

MELSEC-Q

(f) By installing multiple network modules, N:N communication (transient

transmission) with destination stations on eight network systems that use the programmable controllers as relay stations can be performed using the routing function. (Refer to Section 7.4.2, "Routing Function.") Transient transmission using the routing function can be performed not only in a system composed of MELSECNET/H networks but also in a system that contains CC-Link IE Controller Network, CC-Link IE Field Network and/or MELSECNET/10 networks.

QJ71 LP21

No.1

Q25H

CPU

MELSECNET/H

QJ71 LP21

Request destination

MELSECNET/H

Q25H

QJ71

CPU

LP21

No.3

No.2

QJ71 LP21

Q25H

CPU

Q25H

CPU

QJ71 LP21

MELSECNET/HMELSECNET/H

Q25H

CPU

QJ71 LP21

No.4

QJ71 LP21

Request source

MELSECNET/ H MELSECNET/H

Q25H

CPU

QJ71 LP21

Q25H

CPU

QJ71 LP21

Q25H

QJ71 LP21

No.7No.8

QJ71 LP21

CPU

MELSECNET/HMELSECNET/H

No.5No.6

: Only the High Performance model QCPU, Process CPU, Redundant

CPU, and Universal model QCPU accept multiple network modules.

(g) The following three types of network systems can be configured

according to applications of each user.

1) Loop system that is more resistant to noise and provides longer distance in total and between stations. (Up to 30km in total length)

2) Coaxial bus system that allows easier wiring (Up to 500m in total length)

3) Twisted bus system that allows the use of general-purpose cables (Up to 1200m in total length) (Refer to Section 3.1, "Performance Specifications.")

(h) The following functions facilitate network connection:

1) Any station to be connected in the future can be specified as a reserved

station. Specifying a station not actually connected as a reserved station prevents a communication error. (Refer to Section 5.3.4 "Specification of the reserved station.")

2) It is not necessary to connect stations in order of the station Nos. in the

network. (Refer to Section 4.2 "Part Names and Settings.")

1 - 6 1 - 6

1 OVERVIEW

Network module

QCPU

Send

J.SEND

(3) Providing various communication services

(a) Transient transmission can be performed by designating a channel

number (1 to 64) of the receiving station. This function allows to set (change) the channel numbers arbitrarily with the sequence programs and to perform transmission to multiple stations with the same channel number at one time. (Refer to Section 7.4.4, "Message sending function using the logical channel numbers.")

Receiver channel unmatched

Sender

Discard

Receiver channel No. 9

Received

MELSECNET/H

Receiver channel No. 9

QCPU

Channel 1

Channel

No.1

No.2

No.3

MELSEC-Q

Channel

No.9

No.20

Network module

Receive

J.RECV

Receiver channel unmatched

Receiver channel No. 9

(b) By using the low-speed cyclic transmission function, it is possible to

cyclically send data that does not require high-speed transmission in a batch mode, separately from the normal cyclic transmission (LB/LW). Highspeed transmission can be achieved by efficiently dividing the data to transmit into data that requires high-speed transmission, which is sent by the normal cyclic transmission, and other data that is sent by low-speed cyclic transmission. There are three types of transmission method depending on how the transmission is activated.

1) "Transmission of data for one station in one link scan" (default)

2) "Periodical cycle interval" which transmits in a set time cycle

(hour/minute/second)

3) "System times" which transmits data at the specified timing

(year/month/day/hour/minute/second) (High Performance model QCPU, Process CPU, Redundant CPU, and Universal model QCPU) (Refer to Section 7.3, "Low-Speed Cyclic Transmission Function.")

MELSECNET/H

Low-speed cyclic transmission data

1 - 7 1 - 7

1 OVERVIEW

I50

Interrupt sequence program

MELSEC-Q

up using the event issue function. This function reduces the response time of the system and process real-time data receiving. (Refer to Section 7.5, "Starting Up the Interrupt Sequence Program.")

CPU module

IRET

MAIN

Normal sequence program

END

Conditions matched

Network module

Condition check

Interrupt condition parameters

• Relay information

• Register data

• Arrival at a channel

• Network status

MELSECNET/H

Transient transmission from other station

Cyclic transmission

(4) Enhanced RAS functions (Refer to Section 3.2.2, "RAS function.")

(a) By using the control station switch function, if the control station of the

network is down, a normal station is substituted for the control station, enabling to continue the network communication.

(b) When a faulty station recovers and can resume normal operation, it

automatically returns to the network to resume the data communication using the automatic return function.

reconnected to the network as a normal station, reducing network downtime.

(d) The loopback function (in the optical loop system) isolates a faulty part,

where a fault such as cable disconnection or a station error has occurred, and enables data communications among operable stations.

(e) Preventing station failure using external power supply

When two or more stations are faulty and halted in the optical loop system, stations between these faulty stations can continue the data link. Because the loop back is prevented, the link scan time will be stabilized. (The QJ71LP21S-25 is the network module where external power can be supplied.)

1 - 8 1 - 8

1 OVERVIEW

MELSEC-Q

(f) By using the station detach function (coaxial bus system and twisted bus

system), even when some of the connected stations are down due to power off, etc., the normal communication can be continued among other operational stations.

(g) W hen an error occurs in a normal network due to disconnection, etc. the

data link can be continued by switching to link data refresh on the standby network if two network modules, a regular module and a standby module, are installed for each programmable controller CPU (High Performance model QCPU and Process CPU)

(h) The network module can continue the transient transmission even if an

error that stops the CPU module while the system is operating occurs.

(i) It is possible to check the time when a transient error occurred.

REMARKS

The following faults make the RAS functions valid.

 Break in cable  Power-off of slave station  Network setting error  Fault detectable by self-diagnostics of CPU module

If the network module has become faulty, the RAS functions may not be activated depending on the fault.

1 - 9 1 - 9

1 OVERVIEW

MELSEC-Q

(5) Enhancement and compatibility of the network functions

(a) Because of the 32-bit data assurance, data with double word precision

(32 bits) can be assured without an interlock. (Refer to Section 6.2.1, "32-bit data assurance.")

CPU module

device W

Network module

Updated part

of refresh A

Updated part

of refresh B

Updated part

of refresh C

Refresh A

Refresh B

Refresh C

Positional data 1 lower

higher

Positional data 2

Positional data 9

Positional data 10

lower

higher

lower

higher

lower

higher

Link refresh in 32-bit units

(b) Through the station-based block data assurance for cyclic data, it is

possible to manipulate multiple word data without interlocks. (Refer to Section 6.2.2, "Station-based block data assurance for cyclic data.")

CPU module

device W

Updated part

of refresh A

Refresh A

Network module

Station No. 1

Updated part

of refresh B

Updated part

of refresh C

Refresh B

Refresh C

Station No. 2

(Host)

Station No. 3

Station No. 4

be tested in the online environment without affecting systems being operated. (Refer to Section 5.2.5, "Mode.")

Being debuggedGX Develope

Data

receive

possible

LB/LW

Systems being operated

MELSECNET/H

1 - 10 1 - 10

1 OVERVIEW

MELSEC-Q

(d) By using the MELSECNET/10 mode (functional compatibility and

performance compatibility mode), the MELSECNET/H can be used together with the conventional network modules to easily install a programmable Controller Network system. To use the MELSECNET/H in the MELSECNET/10 mode (functional compatibility and performance compatibility mode), please refer to the "For QnA/Q4AR MELSECNET/10 Network System Reference Manual".

QnACPU

QCPU QCPU QCPU

MELSECNET/H

QCPU

A2USCPU

MELSECNET/10

(6) Increased ease of network configuration in combination with GX

Developer

(a) The network parameters can easily be set by visualizing pull-down menus,

dialogue boxes, etc.

(b) The settings of network Nos., group numbers and operation modes have

been simplified so that these values can be specified only through software settings.

station is not required. The normal station operates with the transmission speed set to the control station. (Refer to Section 5.2.6, "Communication speed setting.")

(Network parameters)

Pull-down menu

Simplified

1 - 11 1 - 11

1 OVERVIEW

MELSEC-Q

(System monitor/error code display)

Displays the latest error code.

Displays error history.

Displays the description and corrective action of the error code selected in error history.

(d) After assigning the refresh parameters and inter-link data transfer devices

to a network system in which multiple network modules are installed, duplicate device settings can easily be checked with [Assignment image diagram].

1 - 12 1 - 12

1 OVERVIEW

MELSEC-Q

(7) Redundant system configuration

(a) Network modules can be dualized.

A system containing a network module can be dualized (redundant system) by installing another network module and using redundant CPUs. In case of an error in the control system CPU or a network module, the redundant system including double network modules switches the control system to the standby system, allowing system control and data linking to be continued on the standby system. (Refer to Section 7.10.1.)

(b) Automatically issuing system switching request to the control system CPU

If failure of a network module mounted to the control system CPU of the redundant system or a data link error is detected, a system switching request will be automatically issued to the CPU. (Refer to Section 7.10.5.)

By transient transmission using special link instructions or GX Developer, device data can be read from or written to the host system, control/standby system, or system A/B in the redundant system, and remote RUN/STOP can be executed. (Refer to Section 7.4.5.) When the redundant system is a target station, even if system switching occurs, the target can be followed by specifying the CPU type of the station to control or standby system.

MELSECNET/H PLC to PLC network

Control system Standby system

MELSECNET/H remote I/O network

1 - 13 1 - 13

1 OVERVIEW

1.3 Symbols Used in This Manual

MELSEC-Q

Generic terms and

abbreviations for CPU

modules

Basic model QCPU

High Performance model QCPU

Process CPU

Redundant CPU

Universal model QCPU

Safety CPU

C Controller module

Other than Redundant CPU

Other than Universal model QCPU

Other than Safety CPU

(1) Symbols

Symbol Name

MP Control station

NS Normal station (Station that can serve as a control station)

(2) Symbol format

Group number (1 to 32): G Station number (1 to 64) Symbol

Network number (1 to 239)

[Example]

1) Network No. 3, control station, station number 6: 3M

2) Network No. 5, normal station, station number 3: 5N

(3) Generic terms and abbreviations for CPU modules

CPU model

Q03UDE Q04UDEH Q06UDEH Q10UDEH Q13UDEH Q20UDEH Q26UDEH Q50UDEH

Q100UDEH

Q03UDV Q04UDV Q06UDV Q13UDV Q26UDV

Q00J

Q00 Q01

Q02U

Q02

Q02PH

Q02H

Q06PH

Q06H

Q12PH

Q12H

Q25PH

Q25H

Q12PRH Q25PRH

Q00UJ

Q00U Q01U

Q03UD Q04UDH Q06UDH Q10UDH Q13UDH Q20UDH Q26UDH

QS001

P6 S3

Q06CCPU-V

Q06CCPU-V-B

Q12DCCPU-V

Q24DHCCPU-V

Q24DHCCPU-VG

Q24DHCCPU-LS Q26DHCCPU-LS

1 - 14 1 - 14

2 SYSTEM CONFIGURATION

MELSEC-Q

2.1 MELSECNET/H Network Configurations

This section describes network configurations available with the MELSECNET/H.

This chapter explains system configurations available with the MELSECNET/H.

2.1.1 Single network system

A single network system is the system where the control station and normal stations are connected with any of the following cables.

 Optical loop system: Optical fiber cable  Coaxial bus system: Coaxial cable  Twisted bus system: Shielded twisted pair cable or CC-Link Ver. 1.10-compatible

cable.

(1) Optical loop system

In the optical loop system, 1 control station and 63 normal stations (a total of 64 stations) can be connected. Any station number can be assigned as the control station. Note that only one station can be set as the control station per system. In the following sample system, station number 1 is assigned as the control station.

Station No.1

(control station)

Station No. 2

(normal station)

Station No. 64

(normal station)

QCPU

Power supply

QJ71

LP21

QCPU QJ71

Power supply

LP21

QCPU QJ71

LP21

Power supply

Optical fiber cable

(2) Coaxial bus system

In the coaxial bus system, 1 control station and 31 normal stations (a total of 32 stations) can be connected. Any station number can be assigned as the control station. Note that only 1 station can be assigned as the control station per system.

Station No.1

(control station)

QJ71 BR11

Power supply

Station No. 2

(normal station)

QCPU QCPUQCPU

Power supply

QJ71 BR11

Station No. 32

(normal station)

QJ71 BR11

Power supply

Coaxial cable

Terminating resistor A6RCON-R75

2 - 1 2 - 1

2 SYSTEM CONFIGURATION

MELSEC-Q

(3) Twisted bus system

In the twisted bus system, 1 control station and 31 normal stations (a total of 32 stations) can be connected. Any station number can be assigned as the control station. Note that, only 1 station can be assigned as the control station per system.

Station No.1

(control station)

QJ71

QCPU

NT11B

Power supply

Terminating

Twisted pair cable or CC-Link Ver.1.10-compatible cable

resistor

Station No.2

(normal station)

QJ71

QCPU

NT11B

Power supply

Station No.32

(normal station)

QJ71

QCPU

NT11B

Power supply

Terminating

resistor

POINT

A safety CPU operates as a normal station. (It cannot be set to a control station.)

2 - 2 2 - 2

2 SYSTEM CONFIGURATION

2.1.2 Redundant system (Redundant CPU)

The redundant system refers to a system where a system including a network module is dualized by connecting another network module to another redundant CPU (redundant system). If failure of the control system CPU or a network module occurs, the redundant system switches the control system to the standby system, allowing system control and data linking to be continued on the standby system. For details, refer to Section 7.10.1.

MELSECNET/H PLC to PLC network

MELSEC-Q

Control system Standby system

MELSECNET/H remote I/O network

POINT

The QJ71NT11B does not support the Redundant CPU.

2 - 3 2 - 3

2 SYSTEM CONFIGURATION

MELSEC-Q

2.1.3 Simple dual-structured system (High Performance model QCPU and Process CPU)

In a simple dual-structured system, "regular" and "standby" network modules are installed in each CPU module, so that if the regular network is down, the data link can still be continued by switching to the standby network through link data refresh. For details, refer to Section 7.7.

Control station Normal station Normal station

Power supply

Q25H

CPU

Regular

Standby

Network No. 1

Power supply

Q25H

CPU

Power supply

Q25H

CPU

Regular

Standby

Network No. 2

Standby

POINT

Simple dual-structured system cannot be configured with the Basic model QCPU, Redundant CPU, and Universal model QCPU. These CPUs are applicable for a single network system.

Q25H

CPU

Power supply

Q25H

Power supply

CPU

Regular

Standby

Regular

Standby

Regular network

Standby network

2 - 4 2 - 4

2 SYSTEM CONFIGURATION

MELSEC-Q

2.1.4 Multiple network system (High Performance model QCPU, Process CPU, Redundant CPU, and Universal model QCPU)

(1) What is multiple network system

The multiple network system is a network system in which multiple networks are connected via relay stations. (a) Duplicated setting of a network number is not allowed. The network

number can be freely set within a range from 1 to 239 unless the same number is used two or more times in a system.

(b) A maximum of 4 network modules can be installed per programmable

controller. Note that there are restrictions on the number of modules that can be installed to each programmable controller, depending on the CPU module model. (Refer to the user's manual for the CPU module used.).

Control station

Q25H

CPU

Power supply

QJ71

LP21

POINT

Network No. 1

Network No. 2

1st

2nd

module

4th

3rd

module

Network No. 3

module

Network No. 4

Only one network module can be mounted to the Basic model QCPU, Q00UJCPU, Q00UCPU, Q01UCPU, and safety CPU. For this reason, these CPUs cannot be used as relay stations when configuring a multiple network system using the MELSECNET/H.

(2) Configuration

The following example shows how three networks can be connected.

Network No. 1

Normal station

Q25H

CPU

Power supply

QJ71 LP21

Control station

QJ71 LP21

Network No. 2

Normal station

Q25H

CPU

Power supply

QJ71 LP21

QJ71 BR11

Control station 3M

Q25H

CPU

Power supply

Normal station

QJ71

BR11

Network No. 3

Q25H

QJ71

CPU

BR11

Power supply

3NS3

Normal station

Q25H

CPU

Power supply

Normal

station

Q25H

CPU

Power supply

Normal station

QJ71

BR11

3NS4

Power supply

Q25H

CPU

QJ71 LP21

Normal station 2N

2 - 5 2 - 5

2 SYSTEM CONFIGURATION

2.2 Applicable Systems

This section describes the applicable systems. No. of mountable modules is the maximum number of mountable network modules with CC-Link IE Controller Network.

(1) Applicable modules and base units, and number of mountable

modules

(a) When mounted with a CPU module

Refer to the user’s manual for the CPU module used.

Observe the following:

• Use the network module which satisfies the following conditions for the Redundant CPU.

• Use the network module which satisfies the following conditions for the safety CPU.

• A shortage of the power capacity may result depending on the combination of mounted modules or the number of mounted modules. When mounting modules, consider the power capacity. If the power is insufficient, change the combination of modules.

• Mount modules so that the total number of I/O points does not exceed the point range of the CPU module. Modules can be mounted in any slot within the applicable range.

• Function version D or later

• Network modules other than the QJ71NT11B

• Serial number (first five digits) "08102" or later

• Function version D or later

• Network modules other than the QJ71NT11B

MELSEC-Q

REMARKS

When mounted with a C Controller module, refer to the user’s manual for the C Controller module used..

(b) When mounted on a MELSECNET/H remote I/O station

The network module cannot be mounted on a MELSECNET/H remote I/O station. Mount it with a CPU module on the master station.

Refer to the MELSEC iQ-R Module Configuration Manual.

(2) Support of the multiple CPU system

Before using the network module in a multiple CPU system, refer to the QCPU User’s Manual (Multiple CPU System). To configure the MELSECNET/H with a multiple CPU system, use a network module of function version B or later. For precautions for the use in a multiple CPU system, refer to Section 2.2.2.

2 - 6 2 - 6

2 SYSTEM CONFIGURATION

(3) Compatible network modules

Available network types and systems vary depending on the function version of

Basic model QCPU

High Performance model QCPU

Process CPU

Redundant CPU Redundant system

Universal model QCPU

Safety CPU Single CPU system

Basic model QCPU

High Performance model QCPU

Process CPU

Redundant CPU Redundant system Not supported

Universal model QCPU

Safety CPU Single CPU system Not supported

the network module.

(a) When optical loop system or coaxial bus system is used

MELSECNET/H Extended mode

Single CPU system Multiple CPU system Function version B or later Single CPU system Function version A or later Multiple CPU system Function version B or later Single CPU system Function version A or later Multiple CPU system Function version B or later

Single CPU system

Multiple CPU system Function version B or later

Function version D or later

(Serial number (first five digits)

"06092" or later)

Function version D or later

(Serial number (first five digits)

"07102" or later)

Function version D or later

(Serial number (first five digits)

"06092" or later)

Function version D or later

(Serial number (first five digits) "08102" or later)

(b) When twisted bus system is used

MELSECNET/H Extended mode MELSECNET/H mode

Single CPU system Multiple CPU system Single CPU system Multiple CPU system Single CPU system Multiple CPU system

Single CPU system Multiple CPU system

From the first version

MELSEC-Q

MELSECNET/H mode

MELSECNET/10 mode

Function version A or later

Function version D or later

Function version A or later

2 - 7 2 - 7

2 SYSTEM CONFIGURATION

MELSEC-Q

(4) Compatible software packages (when using GX Developer)

The systems using network modules and compatible software packages are

Q00J/Q00/Q01CPU

Q02/Q02H/Q06H/ Q12H/Q25HCPU

Q02PH/Q06PHCPU

Q12PH/Q25PHCPU

Q12PRH/Q25PRHCPU Redundant system Version 8.29F or later Version 8.18U or later Q02U/Q03UD/Q04UDH/

Q06UDHCPU

Q13UDH/ Q26UDHCPU

Q03UDE/Q04UDEH/ Q06UDEH/Q13UDEH/ Q26UDEHCPU Q00UJ/Q00U/Q01U/ Q10UDH/Q20UDH/ Q10UDEH/Q20UDEHCPU QS001CPU Single CPU system Version 8.40S or later

CPU modules other than the above

shown in the table below.

(a) When the optical loop system or coaxial bus system is used

MELSECNET/H Extended mode

Single CPU system Multiple CPU system Version 8 or later Single CPU system Version 4 or later Multiple CPU system Version 6 or later Single CPU system Multiple CPU system Single CPU system Multiple CPU system

Single CPU system Multiple CPU system Single CPU system Multiple CPU system

Single CPU system

Multiple CPU system

Single CPU system

Multiple CPU system

Single CPU system Multiple CPU system

Version 8.20W or later

Version 8.68W or later

Version 8.20W or later Version 7.10L or later

Version 8.48A or later

Version 8.62Q or later

Version 8.68W or later

Version 8.78G or later

Not supported

MELSECNET/H mode

MELSECNET/10 mode

Version 7 or later

Q00J/Q00/Q01CPU

Q02/Q02H/Q06H/ Q12H/Q25HCPU

Q02PH/Q06PH/ Q12PH/Q25PHCPU

Q00UJ/Q00U/Q01U/Q02U/ Q03UD/Q04UDH/Q06UDH/ Q10UDH/Q13UDH/Q20UDH/ Q26UDH/Q03UDE/ Q04UDEH/Q06UDEH/ Q10UDEH/Q13UDEH/ Q20UDEH/Q26UDEHCPU

CPU modules other than the above

(b) When the twisted bus system is used

MELSECNET/H Extended mode MELSECNET/H mode

Single CPU system Multiple CPU system Single CPU system Multiple CPU system Single CPU system Multiple CPU system

Single CPU system

Multiple CPU system

Single CPU system Multiple CPU system

Version 8.78G or later

Not supported

(5) Compatible software packages (when using GX Works2)

For a system with a network module and GX Works2 version, refer to the following manual.

• GX Works2 Version 1 Operating Manual (Common)

2 - 8 2 - 8

2 SYSTEM CONFIGURATION

2.2.1 Precautions when using link dedicated instructions

When accessing to other stations from MELSECNET/H network modules (who issue the request) with function version B or later upon link dedicated instructions, the handling methods are different depending on the module of the target station. The handling methods for each module of the target station are explained below.

(1) Link dedicated instructions modified for function version B

The data length of the SEND, READ, SREAD, WRITE and SWRITE instructions is changed (480 words 960 words.)

(a) When the target station is a network module

Target station

Request issued by

480 words or less

481 to 960 words

CC-Link IE

Controller

Network

module

CC-Link IE

Field Network

module

MESLECNET/H network module

Function version B or D Function version A

: Processed normally

: Ends abnormally. Error code returned to the request source.

1: The SEND instruction ends abnormally. Error code returned to the

request source. The READ, SREAD, WRITE, and SWRITE instructions are processed normally.

(b) When the target station is a Q series Ethernet module

Target station (Q series Ethernet module)

Request issued by

480 words or less

481 to 960 words

: Processed normally

: Ends abnormally. Error code returned to the request source.

1: The SEND instruction ends abnormally. Error code returned to the

request source. The READ, SREAD, WRITE, and SWRITE instructions are processed normally.

2: The operations for the SEND instruction are not normal. (Error support

available F7C3 The READ, SREAD, WRITE, and SWRITE instructions are processed normally.

3: Serial number (first five digits)

Function version D

07082 or later

)

07081 or earlier

MELSEC-Q

MESLECNET/10

network module

Function

version B

Function

version A

2 - 9 2 - 9

2 SYSTEM CONFIGURATION

(2) Instructions added for function version B

CC-Link IE

Request issued by

RRUN, RSTOP, RTMRD, RTMWR

Controller

Network

module

: Processed normally.

: Ends abnormally. Error code returned to the request source.

CC-Link IE

Field Network

module

Target station

MELSECNET/

H network

module

MELSECNET/

10 network

module

MELSEC-Q

Q series

Ethernet

module

2 - 10 2 - 10

2 SYSTEM CONFIGURATION

2.2.2 Precautions when using network modules in the multiple CPU system

Pay attention to the following points when configuring a MELSECNET/H network system with a multiple CPU system.

(1) Set the network parameters in the control CPU that controls the network

modules.

(2) A maximum of four network modules can be set for each control CPU module.

Note that a total of four network modules can be mounted in the multiple CPU system.

(a) CPU No.1 controls all network modules.

CPU

QJ71

No.1

No.2

BR11

QJ71 BR11

(b) CPU No.1 and CPU No.2 control network modules

separately.

CPU No.1

CPU No.2

QJ71 BR11

MELSEC-Q

QJ71

BR11

CPU No.1

CPU No.2

CPU No.3

CPU No.4

QJ71 BR11

CPU

No.1

No.2

: The number of modules exceeded the limit.

QJ71 BR11

2 - 11 2 - 11

2 SYSTEM CONFIGURATION

(3) Precautions for execution of transient transmission

(a) Access range of GX Developer

When connecting GX Developer to a CPU module and accessing other stations, it is possible for GX Developer to access up to the 8 network systems whether the relay stations on the multiple CPU system are control or non-control CPUs. (Refer to 7.4.2 Routine Functions in section) It is also possible for GX Developer to access either a control or non-control

1) Relaying is possible if the relay station's control CPU is

the same

GX Developer

CPU

CPU No.2

QJ71 BR11

No.1

CPU if the target station is in a multiple CPU system.

CPU No.1 is a

control CPU

MELSEC-Q

2) Relaying is also possible if the relay station's control CPU

is different

GX Developer

CPU No.1 is a control CPU

CPU

CPU No.2

QJ71 BR11

No.1

CPU No.1 is a control CPU

CPU

QJ71

No.1

No.2

CPU No.1

BR11

CPU No.2

QJ71 BR11

CPU No.1 is a

control CPU

CPU No.1 is a

control CPU

CPU No.1

CPU No.2

CPU No.1

QJ71 BR11

CPU No.2

QJ71 BR11

CPU No.2 is a control CPU

CPU No.1 is a control CPU

2 - 12 2 - 12

2 SYSTEM CONFIGURATION

(b) Setting routing parameters

If different control CPUs are set to relay stations, set the same routing parameter to each of the control CPUs. The following illustration shows a setting example where transient data are transmitted from 1Mp1 to 3Ns2.

MELSEC-Q

QCPU

(Request

source)

1Mp1

QCPU 1Ns2

Network No.1

1Ns3 2Mp1QCPU QCPU

QCPU 2Ns3

1) When different control CPUs are set to relay stations, set the same routing parameter.

No.2No.1

When the same control CPU is set to relay stations, set the routing parameter only to the control CPU.

QCPU 2Ns2 3Mp1

Network No.2

1Ns3 2Mp1QCPU QCPU

Control CPU is QCPU No.2 Control CPU is QCPU No.1

QCPU

(Request destination)

Network No.3

3Ns2

1Ns3 2Mp1QCPU QCPU

No.2No.1

Control CPU is QCPU No.2 Control CPU is QCPU No.2

2 - 13 2 - 13

2 SYSTEM CONFIGURATION

(4) Data cannot be transferred between data links with data link transmission

parameters if the control CPUs of the network modules on the multiple CPU system are different.

(a) Transmission between data links possible

To transfer data to another network, use the CPU shared memory.

CPU No.1 is a control CPU

MELSEC-Q

(b) Transmission between data links not possible

CPU No.1 is a control CPU

CPU No.2 is a control CPU

CPU

CPU No.1

CPU

No.1

No.2

QJ71 BR11

CPU No.1

QJ71 BR11

CPU No.2

QJ71 BR11

CPU No.1

CPU No.2

QJ71 BR11

CPU No.1

QJ71 BR11

CPU No.2

QJ71 BR11

2 - 14 2 - 14

2 SYSTEM CONFIGURATION

(5) Precautions for executing a link dedicated instruction to a multiple CPU system

(Group specification, All stations) If a WRITE/SWRITE, REQ, RRUN/RSTOP or RTMWR instruction is issued under the following conditions (a), it may not be executed on some stations depending on the system configuration (Control CPU setting) of the target multiple CPU system. (Refer to (b).) (a) Execution conditions

Target station CPU type ((S1)+3) setting

Target station No. ((S1)+5) setting

(b) Execution result

Target station

No. ((S1)+5)

setting

Group

specification

(81

to A0H) or

All stations

(FF

)

Target station CPU type

((S1)+3) setting

Multiple CPU system

No.1 (03E0

Multiple CPU system

No.2 (03E1

Multiple CPU system

No.3 (03E2

Multiple CPU system

No.4 (03E3

)

Target station’s

control CPU is No.1

O : The instruction is executed.

X : The instruction is not executed. Error completion is not identified on the execution source.

MELSEC-Q

Item Setting

Set the CPU type to any of the following.

• Multiple CPU system No.1 (03E0

• Multiple CPU system No.2 (03E1

• Multiple CPU system No.3 (03E2

• Multiple CPU system No.4 (03E3

Set the station No. of the target station to either of

the following.

• Group specification (81

• All stations (FF

Execution result

Target station’s

control CPU is No.2

Target station’s

control CPU is No.3

to A0H)

)

Target station’s

control CPU is No.4

2 - 15 2 - 15

2 SYSTEM CONFIGURATION

(6) When all of the following conditions from a) to d) are met, use a

MELSECNET/H module whose serial number (first five digits) is "10042" or later. (a) A multiple CPU system containing a Built-in Ethernet port QCPU is

configured.

(b) To the Ethernet port of the Built-in Ethernet port QCPU, GX Developer or

GOT is connected.

MELSECNET/H module controlled by another CPU.

(d) The access target on another station is an A/QnA series CPU module.

MELSEC-Q

2 - 16 2 - 16

2 SYSTEM CONFIGURATION

MELSEC-Q

2.2.3 List of functions for each CPU module

The available functions of the MELSECNET/H depend on the CPU module with which a network module is mounted.

1)High Performance model QCPU, Process CPU

2)Basic model QCPU

3)Redundant CPU

4)Universal model QCPU

Function

Cyclic transmission function MELSECNET/H Extended mode

Refresh parameter Common parameter Station inherent parameter Inter-link data transfer function Designation of I/O master station Designation of reserved station Low-speed cyclic transmission function

Redundant system function Transient transmission function Routing function

Group function

Message sending function using logical channel numbers

Link dedicated instruction RAS function Section 3.2.2 Automatic return function

Control station shift function

Control station return control function

Loopback function

Station detach function

Transient transmission possible even in case of CPU error

Confirmation of transient transmission error detection time

Module diagnosis

Network test

Network diagnosis Direct accessing of link device Clock setting to a station on the network by GX Developer Getting the interrupt sequence program started Multiplexed transmission function Simplified redundant setting of network Increasing the number of send points by connecting multiple modules of the same network number

*1: Up to 8 modules can be set. *2: The low-speed LB/LW cannot be set because these models do not support the low-speed cyclic transmission function. *3: The SREAD/SWRITE instruction’s read/write notice device (D3) becomes invalid. (The same operation as the

READ/WRITE instructions takes place.) *4: It is available for the Basic model QCPU of function version B or later. *5: Available for the Universal model QCPU whose serial No. (first 5 digits) is "09042" or later. *6: For link dedicated instructions for the safety CPU, refer to Section 6.3. *7: Basic model QCPU and safety CPU cannot execute a network test on a sequence program. *8: Applicable to the Universal model QCPU excluding the Q00UJCPU, Q00UCPU, and Q01UCPU.

5)Safety CPU

CPU module

1) 2) 3) 4) 5)

*5*8

: Available, : Unavailable

Section 3.2.1 Section 5.1

Section 5.7

Section 5.3 Section 5.6 Section 7.2 Section 5.3.3 Section 5.3.4 Section 7.3 Section 7.10 Section 7.4

Section 7.4.2 Section 7.4.3 Section 7.4.4

*3*6

Section 7.4.5

Section 3.2.2 Section 3.2.2 Section 3.2.2 Section 3.2.2 Section 3.2.2 Section 3.2.2 Section 3.2.2 Section 3.2.2

Section 7.8 Section 8.1 Section 7.1 Section 7.4.6 Section 7.5 Section 7.6 Section 7.7

Section 7.9

Reference

section

2 - 17 2 - 17

2 SYSTEM CONFIGURATION

2.3 Checking Serial Number and Function Version

The serial number and function version of the network module can be checked on the rating plate, front of the module, or system monitor window in GX Developer.

(1) Checking on the rating plate

The rating plate is located on the side of the network module.

MELSEC-Q

(2) Checking on the front of the module

The serial number and function version on the rating plate is printed on the front (at the bottom) of the module. The following network module is not included.

• QJ71LP21

110620000000000-D

Function version

Serial No.

2 - 18 2 - 18

2 SYSTEM CONFIGURATION

(3) Checking on the System Monitor screen (Product Information List)

To display the system monitor, select [Diagnostics] [System monitor]

Product Inf. List button of GX Developer.

Function version

Serial No.

MELSEC-Q

Product No.

(a) Production number display

Since the network module does not support the production number display,

POINT

The serial number displayed on the Product Information List screen of GX Developer may differ from that on the rating plate or on the front of the module.

• The serial number on the rating plate or on the front of the module indicates

• The serial number displayed on the Product Information List screen indicates

"-" is displayed.

the management information of the product.

the functional information of the product. The functional information of the product will be updated when a function is

added.

2 - 19 2 - 19

3 SPECIFICATIONS

MELSEC-Q

3 SPECIFICATIONS

This chapter explains the performance specifications and function specifications of the network modules as well as the specifications of the send/receive processing time of the link data. For details of the general specifications, refer to the QCPU User's Manual (Hardware Design, Maintenance and Inspection).

3.1 Performance Specifications

3.1.1 Performance specifications

Item

Maximum number of link points per network

Maximum number of link points per station *1

Communication speed 10 Mbps

Number of stations per network Up to 64 stations (1 control station, 63 normal stations) Connection cable Optical fiber cable (obtained by user)*2

Applicable connector

Overall distance 30km

Distance between

stations*

Maximum number of networks 239 (total including remote I/O networks) Maximum number of groups 32 (9 in the MELSECNET/10 mode) Transmission path format Duplex loop Communication method Token ring Synchronous method Frame synchronous Encoding method NRZI code (Non Return to Zero Inverted) Transmission format Conforms to HDLC (frame type) Error control system

RAS function

Transient transmission

Special cyclic transmission function • Low-speed cyclic transmission function

Number of occupied I/O points

Voltage Current

External Power Supply

Size of terminal screw Suitable crimp terminal Suitable cable size Tightening torque Allowable momentary power failure time

The following table lists the performance specifications of the network modules.

(1) Performance specifications of the optical loop system

LX/LY 8192 points LB 16384 points (8192 points in the MELSECNET/10 mode) LW 16384 points (8192 points in the MELSECNET/10 mode)

During 25Mbps

During 10Mbps

QJ71LP21 QJ71LP21-25 QJ71LP21S-25 QJ71LP21G QJ71LP21GE

• MELSECNET/H mode, MELSECNET/10 mode {(LY + LB) / 8 + (2 LW)}  2000 bytes

Broad-band H-PCF optical cables: 1km

• Loopback function upon abnormal detection and cable breakage (optical loop system only)

• Diagnostic function of host link line check

• Prevention of system down by switching the control station

• Abnormal detection using link special relays and link special registers

• N:N communication (monitor, program upload/download, etc.)

• Various send/receive instructions from sequence programs (ZNRD/ZNWR, SEND/RECV, RECVS,

READ/WRITE, SREAD/SWRITE, REQ, RRUN/RSTOP, RTMRD/RTMWR.)

• Send function addressed to logical channel number of channel numbers 1 to 8

(I/O assignment: intelli.; 32 points)

{(LY + LB) / 8 + (2

• MELSECNET/H Extended mode

{(LY + LB) / 8 + (2

25 Mbps/10 Mbps

(Change with mode setting switch)

Two-core optical connector plug (obtained by user) F06/F08 or equivalent (JIS C5975/5977 compliant)

SI optical cables: 200m

H-PCF optical cables: 400m

Broad-band H-PCF Optical Cables: 1km

SI optical cables: 500m

H-PCF optical cables: 1km

QSI optical cables: 1km

32 points

1ms (Level PS1)

QSI optical cables: 1km

Retries based on CRC (X

Optical loop system

LW)}  2000 bytes

LW)}  35840 bytes

+ X

48 (I/O assignment: Empty; first 16, intelli.; last 32)*3

20.4 to 31.2 V DC

0.20 A M3 Screw R1.25-3

0.3 to 1.25 mm

0.42 to 0.58 N·m

GI-50/125 optical

cables: 2km

+ 1) and timeover

(I/O assignment: intelli.; 32 points)

10 Mbps

GI-62.5/125 optical

32 points

cables: 2km

3 - 1 3 - 1

3 SPECIFICATIONS

External Power Supply

Item

Noise immunity

QJ71LP21 QJ71LP21-25 QJ71LP21S-25 QJ71LP21G QJ71LP21GE

Internal current consumption (5VDC) 0.55 A

External dimensions

Weight 0.11 kg 0.20kg 0.11kg

1 The number of LY points of the stations set in the I/O master station is the sum total of the LY points for output to all stations within the block. 2 For old optical fiber cables (A-2P- ), L type differs from H type in the distance between stations. Refer to Section 4.6.1 for details. 3 Two slots are occupied.

Set the numeric value resulted from adding 10

The first empty 16 points can be set to "0" on the "I/O assignment" tab screen within the "Q Parameter" screen. Example: Set 10 (Set 0

H W D

to the I/O No. of the slot where a module mounted as the "Starting I/O No." of the "Network parameter".

as the "Starting I/O No." when the module is mounted on slot 0.

as the "Starting I/O No." when 0 has been set to slot 0 on the " I/O assignment" tab screen.)

98mm 98mm

27.4mm 90mm 90mm

Optical loop system

By noise simulator of 500Vp-p noise voltage, 1s noise width, and 25 to 60Hz noise frequency

55.2mm

MELSEC-Q

98mm

27.4mm 90mm

3 - 2 3 - 2

3 SPECIFICATIONS

MELSEC-Q

Item

Maximum number of link points per network

Maximum number of link points per station *1

Communication speed 10 Mbps

Number of stations per network Up to 32 stations (1 control station, 31 normal stations)

Connection cable Coaxial cable (obtained by user)

Applicable connector

Overall distance for one network

Maximum number of networks 239 (total including remote I/O networks)

Maximum number of groups 32 (9 in the MELSECNET/10 mode)

Transmission path format Single bus

Communication method Token bus

Synchronous method Frame synchronous

Encoding method Manchester code

Transmission format Conforms to HDLC (frame type)

Error control system

RAS function

Transient transmission

Special cyclic transmission function • Low-speed cyclic transmission function

Number of occupied I/O points 32 points (I/O assignment: intelli.; 32 points)

Internal current consumption (5V DC) 0.75A

H 98mm

External dimensions

Weight 0.11kg

1 The number of LY points of the stations set in the I/O master station is the sum total of the LY points for output to all stations within the block. 2 Some restrictions are applied to the cable length between stations depending on the number of stations connected. Refer to section 4.6.2 for details.

W 27.4mm

D 90mm

(2) Performance specifications of the coaxial bus system

Coaxial bus system

QJ71BR11

LX/LY 8192 points

LB 16384 points (8192 points in the MELSECNET/10 mode)

LW 16384 points (8192 points in the MELSECNET/10 mode)

• MELSECNET/H mode, MELSECNET/10 mode {(LY + LB) / 8 + (2

• MELSECNET/H Extended mode {(LY + LB) / 8 + (2 LW)}  35840 bytes

3C-2V 300m

5C-2V 500m 2

5C-FB 500m 2

Can be extended up to 2.5km with the use of a repeater unit (A6BR10, A6BR10-DC.)

• Diagnostic function of host link line check

• Prevention of system down by switching the control station

• Abnormal detection using link special relays and link special registers

• N:N communication (monitor, program upload/download, etc.)

• Various send/receive instructions from sequence programs (ZNRD/ZNWR, SEND/RECV, RECVS,

READ/WRITE, SREAD/SWRITE, REQ, RRUN/RSTOP, RTMRD/RTMWR.)

• Send function addressed to logical channel number of channel numbers 1 to 8

LW)}  2000 bytes

Connector plug for 3C-2V Connector plug for 5C-2V Connector plug for 5C-FB

Retries based on CRC (X

(obtained by user)

+ X12 + X5 + 1) and timeover

3 - 3 3 - 3

3 SPECIFICATIONS

MELSEC-Q

Item

Maximum number of link points per network

Maximum number of link points per station

Communication speed 156kbps/312kbps/625kbps/1.25Mbps/2.5Mbps/5Mbps/10Mbps (Switched by network parameters)

Number of stations per network Up to 32 stations (1 control station, 31 normal stations)

Connection cable Shielded twisted pair cable or CC-Link Ver.1.10-compatible cable

(3) Performance specifications of the twisted bus system

Twisted bus system

QJ71NT11B

LX/LY 8192 points

LB 16384 points

LW 16384 points

• MELSECNET/H mode {(LY + LB) / 8 + (2

• MELSECNET/H Extended mode {(LY + LB) / 8 + (2

LW)}  2000 bytes

LW)}  35840 bytes

Communication

speed

156kbps 2 1200m 1200m

312kbps 600m 900m

Overall distance for one network

Maximum number of networks 239

Maximum number of groups 32

Transmission path format Bus (RS-485)

Communication method Token bus

Synchronous method Frame synchronous

Encoding method Manchester code

Transmission format Conforms to HDLC (frame type)

Error control system Retries based on CRC (X16 + X12 + X5 + 1) and timeover

RAS function

Transient transmission

Special cyclic transmission function • Low-speed cyclic transmission function

Number of occupied I/O points 32 points (I/O assignment: intelli.; 32 points)

Internal current consumption (5V DC) 0.6A

H 98mm

External dimensions

Weight 0.13kg

1 The number of LY points of the stations set in the I/O master station is the sum total of the LY points for output to all stations within the block. 2 This value is set as default of the communication speed.

W 27.4mm

D 90mm

625kbps 400m 600m

1.25Mbps 200m 400m

2.5Mbps

5Mbps 150m

10Mbps 100m

• Diagnostic function of host link line check

• Prevention of system down by switching the control station

• Abnormal detection using link special relays and link special registers

• N:N communication (monitor, program upload/download, etc.)

• Various send/receive instructions from sequence programs (ZNRD/ZNWR, SEND/RECV, RECVS,

READ/WRITE, SREAD/SWRITE, REQ, RRUN/RSTOP, RTMRD/RTMWR.)

• Send function addressed to logical channel number of channel numbers 1 to 8

Shielded twisted pair cable CC-Link Ver.1.10-compatible cable

(Not applicable)

200m

3 - 4 3 - 4

3 SPECIFICATIONS

MELSEC-Q

3.1.2 Optical fiber cable specifications

This section explains the specifications of the optical fiber cables used with the MELSECNET/H optical loop system. Details of the cable specifications must be checked for each cable used. A technical skill and a special tool are needed when connecting an optical fiber cable to an exclusive connector. Optical fiber cables with connectors are available from Mitsubishi Electric System & Service Co. Ltd. (Catalogs of the optical fiber cables are also available.)

Item

Distance

between

stations

Transmission loss 12 dB/km 6 dB/km 5 dB/km 5.5 dB/km 3 dB/km 3 dB/km

Core diameter 200 m 200 m 200 m 185 m 50 m 62.5 m

Clad diameter 220 m 250 m 250 m 230 m 125 m 125 m

Primary membrane 250 m

Applicable connector F06/F08 or equivalent (JIS C5975/5977 compliant)

10 Mbps 500m 1 km 1 km 1 km 2 km 2 km

25 Mbps 200m 400m 1 km 1 km Must not be used Must not be used

For cabling, consult your local Mitsubishi Electric System & Service representative.

SI (Multi-

particulate

glass)

H-PCF

(Plastic-clad)

Broad-band H-

PCF (Plastic-clad)

QSI (Quartz glass)

250 m

GI-50/125

(Quartz glass)

GI-62.5/125

(Quartz glass)

Conversion cable (1m) *1

QJ71LP21GE

OUT

SD RD

Connection loss: 1 dB (max.) Connection loss: 1 dB (max.)

Optical module

REMARKS

The following types of optical fiber cables are available.

A type : Cable for connection inside control panel B type : Cable for connection between control panels inside a building C type : Cable for outdoor connection

DL type : Reinforced cable for outdoor connection For other special-purpose cables such as flexible cables or heat-resistant cables, contact Mitsubishi Electric System & Service Co., Ltd.

(1) Cable loss of GI-62.5/125 optical fiber cable

Adaptor

5.5 dB or less

Total cable loss = 7.5 dB or less

1: Conversion cable

Conversion Type Cable CA type FC type AGE-1P-CA/FC1.5M-A CA type ST type AGE-1P-CA/ST1.5M-A CA type SMA type AGE-1P-CA/SMA1.5M-A

Purchased from: Mitsubishi Electric Europe GmbH

Conversion cable (1m)

Adaptor

SD RD

3 - 5 3 - 5

3 SPECIFICATIONS

3.1.3 Coaxial cable specifications

The following table lists the specifications of the coaxial cables used for the coaxial bus system. Use the following high frequency coaxial cables:

• 3C-2V (JIS C 3501 compliant)

• 5C-2V (JIS C 3501 compliant)

• 5C-FB (JIS C 3502 compliant)

(1) Coaxial cable specifications

The following table indicates the specifications of the coaxial cable. Select coaxial cables that meet the operating ambient temperature (0 to 55 shown in the general specifications of the programmable controller.

Item 3C-2V 5C-2V 5C-FB

MELSEC-Q

)

Structure

Cable diameter 5.4 mm (0.21 inches) 7.4 mm (0.29 inches) 7.7 mm (0.3 inches)

Minimum allowable bend radius 23 mm (0.91 inches) or more 30 mm (1.18 inches) or more 30 mm (1.18 inches) or more

Internal conductor diameter

Insulating material diameter

External conductor diameter

Applicable connector plug

0.5 mm (0.02 inches) (annealed

copper wire)

3.1 mm (0.12 inches)

(polyethylene)

3.8 mm (0.15 inches)

(single annealed copper wire

mesh)

3C-2V connector plug

The following connector plugs are recommended:

• BNC-P-3-NiCAu (Manufactured by DDK Ltd.)

• BCP-C3B (Manufactured by Canare Electric Co., Ltd.)

Internal conductive material

Insulating material

0.8 mm (0.03 inches) (annealed

4.9 mm (0.19 inches)

5.6 mm (0.22 inches)

(single annealed copper wire

5C-2V connector plug

The following connector plugs are recommended:

• BNC-P-5-NiCAu (Manufactured by DDK Ltd.)

• BCP-C5B (Manufactured by Canare Electric Co., Ltd.)

External conductor

copper wire)

(polyethylene)

mesh)

Outer sheath

1.05 mm (0.04 inches) (annealed

copper wire)

5.0 mm (0.19 inches)

(polyethylene)

5.7 mm (0.22 inches)

(aluminum foil tape and annealed

copper wire mesh)

5C-FB connector plug

BCP-C5FA*2 (manufactured by Canare Electric Co., Ltd.) is recommended.

1: This connector plug is a soldering-type connector plug.

2: This connector plug is a crimping-type connector plug.

REMARKS

To order or for inquiries regarding connector plugs and coaxial cables, contact your local Mitsubishi representative.

3 - 6 3 - 6

3 SPECIFICATIONS

(2) Connecting the coaxial cable connectors

CAUTION

 Correctly solder coaxial cable connectors. Incorrect soldering may result in

malfunction.

Components of the BNC connector

MELSEC-Q

The following section explains how to connect the BNC connector (the connector plug for the coaxial cable) to the cable.

(a) Using a BNC connector manufactured by DDK Ltd.

The following explains how to connect the BNC-P-3-NiCAu or BNC-P-5NiCAu to the cable.

 Structure of the BNC connector and coaxial cable

Nut Washer Gasket

Plug shell

Clamp Contact

 How to connect the BNC connector and the coaxial cable

1) Cut the portion of the outer sheath of the coaxial cable as shown in the

Cut this portion of the outer sheath

figure below.

Cable A

3C-2V 15mm (0.59 inches)

5C-2V, 5C-2V-CCY 10mm (0.39 inches)

2) Fit the nut, washer, gasket, and clamp onto the coaxial cable, as shown below, and then loosen the external conductor.

Clamp

Nut

Washer

Gasket

3) Cut the external conductor, insulating material and internal conductor to the dimensions shown below. Note that the external conductor must be cut to the same dimension as the tapered section of the clamp and

Internal conductor

smoothed down to the clamp.

Insulating material

Clamp and external conducto

Cable B C

3C-2V 6mm

(0.24 inches)

5C-2V, 5C-2V-CCY 7mm

(0.28 inches)

3mm

(0.12 inches)

5mm

(0.20 inches)

3 - 7 3 - 7

3 SPECIFICATIONS

POINT

(1) Note the following precautions when soldering the internal conductor and

(2) Before connecting or disconnecting the coaxial connector, touch a grounded

MELSEC-Q

4) Solder the contact to the internal conductor.

Solder here

5) Insert the connector assembly shown in (4) into the plug shell and screw the nut into the plug shell.

contact.

• Make sure that the solder does not bead up at the soldered section.

• Make sure there are no gaps between the connector and cable insulator or they do not cut into each other.

• Perform soldering quickly so the insulation material does not become deformed.

metal object to discharge the static electricity from the human body. Failure to do so may result in a module malfunction.

3 - 8 3 - 8

3 SPECIFICATIONS

MELSEC-Q

(b) Using a BNC connector manufactured by Canare Electric Co., Ltd.

The following explains how to connect the BCP-C3B, BCP-C5B, or BCPC5FA to the cable.

 Structure of the BNC connector and coaxial cable

 How to connect the BNC connector and the coaxial cable

1) Thread a coaxial cable through a crimping sleeve as shown in the figure below. When using a cable with aluminum tape, cut the tape as shown in the figure below.

When cutting the tape, make a clean cut, without leaving any stray

pieces or loose strands. Failure to do so may cause a short circuit or

POINT

(1) Use a crimp tool specified for a BNC connector. (2) Do not crimp the junction of the insulating material and the center contact pin. (3) Horizontally insert the center contact pin into the insulating material and crimp

the pin. If the pin is on the tilt, straight it.

result in an improper crimp.

2) Insert a center contact pin into the internal conductor. Crimp the pin using a crimp tool to seal the gap between the center contact pin and the insulating material.

3 - 9 3 - 9

3 SPECIFICATIONS

MELSEC-Q

3) After the crimp, check the crimp height of the crimp part. When the crimp height at the measurement position is between 1.4mm and

1.5mm, the pin is properly crimped. If the crimp height is not between 1.4mm and 1.5mm, adjust the crimp tool and crimp the center contact pin again.

4) Hold the root of the coaxial cable and fully insert the cable into a plug. After inserting the cable, pull it lightly to check that the center contact pin is fixed. Move the crimp sleeve until it contacts with the plug.

5) Crimp the crimp sleeve using the crimp tool with attention paid to the orientations of the crimp tool and connector. Do not pull the cable when crimping the sleeve.

POINT

Before connecting or disconnecting the coaxial connector, touch a grounded metal object to discharge the static electricity from the human body. Failure to do so may result in a module malfunction.

3 - 10 3 - 10

3 SPECIFICATIONS

3.1.4 Shielded twisted pair cable specifications

The following shows the specifications of a shielded twisted pair cable used in the twisted bus system. Shielded twisted pair cables that satisfy the following specifications can also be used even not introduced.

(1) Shielded twisted pair cable specifications

The following table lists the shielded twisted pair cable specifications.

Item KNPEV-SB 0.5SQ×1P 1

Cross section

MELSEC-Q

Cable Shielded twisted pair cable

Core 2-core

Conductor resistance (20C) 39.4 /km or less

Insulation resistance (20C) 10000M •km or more

Dielectric withstand voltage V-min 1000VAC 1 minute

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

Characteristic impedance (100KHz) 110±10

1: Applicable only when the communication speed is 1.25Mbps or less.

3 - 11 3 - 11

3 SPECIFICATIONS

(2) Connection of shielded twisted pair cables and terminals

Product name Model Manufacturer Remarks

This section explains connecting method of terminal and cable.

(a) Applicable solderless terminals and crimping tools

MELSEC-Q

Solderless terminal FA-VTC125T9

Tool dedicated for

solderless terminal

Solderless terminal TE0.5-10

Tool dedicated for

solderless terminal

Solderless terminal AI0.5-10WH

Tool dedicated for

solderless terminal

1: If a shielded or FG wire is crimped to a solderless terminal using the CRIMPFOX UD6-4 or CRIMPFOX

UD6-6, the wire may not be connected to the terminal block depending on the condition of cross section

of the solderless terminal after crimping.

FA-NH65A

NH-79

CRIMPFOX UD6

CRIMPFOX UD6-4 1

CRIMPFOX UD6-6 1

CRIMPFOX ZA3

For inquiries and orders, please contact

your local Mitsubishi Electric Engineering

Co., Ltd representative.

For inquiries and orders, please contact

your local NICHIFU TERMINAL MFG. Co.,

Ltd representative.

For inquiries and orders, please contact

your local Phoenix Contact representative.

0.3 to 1.65mm2

0.3 to 0.5mm2

0.5mm2

(b) Stripping the cable end

Use an appropriate tool to crimp the solderless terminal. (Refer to (a) in this section) For details of the crimping method, refer to the manuals for the solderless terminal or crimping tool used. In the example, a crimping tool "FA-VTC125T9" manufactured by Mitsubishi is used.

1) Strip the cable jacket by 5.5mm to 6.5mm.

2) Place the terminal in the correct place (in the end) of the locator.

3) Insert the terminal until it reaches to the locator.

4) Insert the stripped cable into the terminal and crimp it.

3 - 12 3 - 12

3 SPECIFICATIONS

3.1.5 CC-Link Ver. 1.10-compatible cable specifications

(1) CC-Link Ver. 1.10-compatible cables for the twisted bus system

The following CC-Link Ver. 1.10-compatible cables can be used.

Product name Model Manufacturer

CC-Link Ver. 1.10-

compatible cable

FANC-110SBH Mitsubishi Electric System & Service Co., Ltd.

FA-CBL200PSBH Mitsubishi Electric Engineering Co., Ltd.

(2) Connection of a solderless terminal to the Version 1.10 compatible

CC-Link dedicated cable

For connection method of a solderless terminal and the cable, refer to Section

3.1.4 (2).

REMARKS

MELSEC-Q

For details, refer to the CC-Link cable wiring manual issued by CC-Link Partner Association.

3 - 13 3 - 13

3 SPECIFICATIONS

3.2 Function Specifications

This section describes the functions of the MELSECNET/H. The list of functions is shown below:

MELSEC-Q

3 - 14 3 - 14

3 SPECIFICATIONS

3.2.1 Cyclic transmission function (periodical communication)

The cyclic transmission function periodically allows data communication between stations on the same network using the link devices (LB/LW/LX/LY). In this manual, the devices on the network module side are prefixed by "L" so that devices on the CPU module side (B/W/X/Y) and the link devices on the network module side can be distinguished.

(1) Communication using LB/LW

By using this function, it is possible to write data to the link relay (LB) and link register (LW) of the network module and to send the data to all the stations connected within the same network.

(a) Available device range

Assign the link devices (LB/LW) in the network within the valid range for writing data of each station on the common parameter LB/LW setting screen of the control station. In addition, the actual device range may be set with the refresh parameters or the station inherent parameters for each station.

(b) Data communication

The link relay (LB) can send and receive the on/off information and the link register (LW) can send and receive 16-bit data. For example, in a network consisting of a control station and two normal stations, when B0 of the control station turns on, the B0 contacts of the two normal stations turn on. At this point, the station inherent parameters have not been set.

Common parameter

LB/LW settings

MELSEC-Q

Control station 1M

B100

B200

1FF

The LB/LW information of

other stations on the network is

transmitted to each station.

100

200

2FF

B(LB) B(LB)

Data sending area of 1M

Data receiving area of 1N

LB/LW data of 1M

LB/LW data of 1N

LB/LW data of 1M

LB/LW data of 1N

3 LB/LW data of 1NS3

B(LB)

Data receiving

area of 1M

Data

100

receiving

area of 1N

1FF 200

Data sending

area of 1N

2FF

Normal station 1N

Normal station 1NP2

100

1FF

200

2FF

B100

Data receiving area of 1M

Data sending area of 1N

Data receiving area of 1N

B100

B200

3 - 15 3 - 15

3 SPECIFICATIONS

(2) Communication using LX/LY

MELSEC-Q

This function allows 1:1 communication between the I/O master station that controls LX/LY and other stations (maximum of 63 stations in the optical loop system and maximum of 31 stations in the coaxial bus system and twisted bus system).

(a) Available device range

Data communication is performed using the input (X) and output (Y) after the actual I/O of the host. For the assignments of the link devices (LX/LY) in the network, the I/O master station and the valid range for writing data for each station are set on the common parameter LX/LY setting screens (two screens) of the control station. The actually available device ranges can also be set for each station with refresh parameters. Up to two stations in a network may be set as the I/O master stations.

(b) Data communication

The link input (LX) can send/receive the input information of each station in the block and the link output (LY) can send/receive the output information of the I/O master station. For example, in a network consisting of a control station and three normal stations, the on/off status can be controlled using the input/output devices between each station and the I/O master station in each block, as shown below.

Block 1

I/O master station

Common

parameter

LX/LY settings

Control station

Normal

station

1NS2

Block 1

I/O master

station 1M

LYLX

31N

Normal

station

Normal

Block 2

station

I/O master station

Block 2

I/O master

station 1N

LX LY

1NS2 1NS4

3 - 16 3 - 16

3 SPECIFICATIONS

I/O master station

Actual I/O

6FF

MELSEC-Q

The following figure shows an example of the LX/LY communication assignments between the 1M When the 1M Also, when the 1N

X1200

P1 station (I/O master station) and the 1NS2 and 1NS3 stations.

P1 station turns on Y1000, X1000 of the 1NS2 station turns on.

S3 station turns on Y1000, X1200 of the 1MP1 station turns on.

8FF

Actual I/O

X1000

Y1000

X1000

X11FF

Y1000

toto

Y11FF

X1000

to to

X11FF X1200

to to

X12FF Y12FF

Y1000

Y11FF

Y1200

Y1000

7FF

X1000 Y1000

to to

X10FF Y10FF

Actual I/O

POINT

1) Any station can be set as an I/O master station regardless of whether the station is a control or normal station.

2) The range in which the X/Y signals are set for the LX/LY communication is the device range starting from the end of the actual I/O of the host (X/Y1000 or thereafter is recommended). Assign these device ranges so that they do not overlap in the following situations:

• When using multiple network modules (CC-Link IE Controller Network, CC-

Link IE Field Network, MELSECNET/H, CC-Link, etc.)

• When setting two I/O master stations.

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3 SPECIFICATIONS

3.2.2 RAS function

The RAS as in the RAS function stands for Reliability, Availability and Serviceability and refers to the overall ease of use of the automated equipment.

(1) Automatic return function

1) The normal station No. 3 is disconnected due to a data link error.

Control

station

(station

No. 1)

MELSEC-Q

When a station disconnected from a network due to a data link error recovers from the error, the station is automatically reconnected to the network and restarts data link.

2) The station No. 3 recovers to the normal status and returns to the system.

Down

Sub-control

station

(station

No. 2)

Network No. 1 Network No. 1Return

Normal

station

(station

No. 3)

Control

station

(station

No. 1)

Sub-control

station

(station

No. 2)

Return

Normal

station

(station

No. 3)

Normal

station

(station

No. 6)

POINT

Normal

station

(station

No. 5)

Normal

station

(station

No. 4)

Normal

station

(station

No. 6)

Normal

station

(station

No. 5)

Normal

station

(station

No. 4)

There is a limit to the number of faulty stations that can return to the system within one link scan. For details, refer to Section 5.4, "Supplementary Settings."

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3 SPECIFICATIONS

(2) Control station switch function

1) When the control station goes down, the station No. 2 becomes the sub-control station.

Down

Control

station

(station

No. 1)

MELSEC-Q

By using this function, if the control station (the station for which the common parameters have been set) goes down, another normal station becomes the subcontrol station to continue the data link.

2) When the sub-control station No. 2 goes down, the station No. 3 becomes the sub-control station.

Switch

Sub-control

station

(station

No. 2)

Network No. 1 Network No. 1

Normal

station

(station

No. 3)

Control

station

(station

No. 1)

Down

Sub-control

station

(station

No. 2)

Switch

Sub-control

station

(station

No. 3)

Normal

station

(station

No. 6)

Normal

station

(station

No. 5)

Normal

station

(station

No. 4)

Normal

station

(station

No. 6)

Normal

station

(station

No. 5)

Normal

station

(station

No. 4)

(a) When switching the control station, whether to continue the cyclic

transmission or not can be selected from sub-control station.

• Common parameter supplementary setting: "Data link by sub-control station when control station is down." is available. (For more details, refer to Section 5.4, "Supplementary Settings.")

Selection of function

1 Select

2 Do not select

Operation during control station switching

Cyclic transmission Transient transmission

: Continued, : Stopped

(b) When the control station is switched, the data link stops temporarily. During

the data link pause, data immediately before the stop is maintained.

faulty stations.

REMARKS

1) The control station does not switch even if the cyclic transmission of the control station is stopped with GX Developer (Refer to Section 7.8).

2) Any of the normal stations whose cyclic transmission is stopped with GX Developer can be a control station.

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3 SPECIFICATIONS

(3) Control station return control function

Selection of function Control station after returning

1 Return as the control station The control station returns as the control station of the network.

2 Return as a normal station

1) When the control station is down, the station No. 2 becomes the sub-control station.

Down

Control station (station

No. 1)

MELSEC-Q

The network stop time can be eliminated by correcting the errors that caused the control station to go down and making it return to the network as a normal station. How the control station returns to the network can be selected by the network settings. For details of the network setting, refer to Section 5.5, "Control Station Return Setting." For the control station return control function in the redundant system, refer to Section 7.10.6.

The control station returns to the network again as a normal station, making the operating sub-control station the new control station of the network. It can become the control station again only by returning to the network when all other stations have gone down.

2) The network does not stop since the control station returns to the network as a normal station.

Return

Sub-control

station

(station

No. 2)

Normal

station

(station

No. 3)

Control

station

(station

No. 1)

Sub-control

station

(station

No. 2)

Normal

station

(station

No. 3)

Return

Normal

station

(station

No. 6)

Normal

station

(station

No. 5)

Normal

station

(station

No. 4)

Normal station

(station

No. 6)

Network No. 1 Network No. 1

Normal

station

(station

No. 5)

Normal

station

(station

No. 4)

REMARKS

• When "Return as the control station" is selected, the network stop time becomes longer because the baton pass is stopped, but the common parameters can be changed only by resetting the CPU of the control station.

• If "Return as a normal station" is selected, the network does not stop because the control station returns to the network without stopping the baton pass. However, it is necessary to reset the CPUs of all the stations after changing the common parameters of the control station while the network is operating. If only the CPU of the control station is reset, a parameter mismatch error is detected in the control station and it is disconnected from the network.

3 - 20 3 - 20

3 SPECIFICATIONS

(4) Loopback function (optical loop system)

MELSEC-Q

In the optical loop system, the transmission path is dual-structured. When an error occurs in a transmission path, the faulty area is disconnected by switching the transmission path from the forward loop to the reverse loop or from the reverse loop to the forward loop, or performing a loopback. The transmission is continued normally between the stations that are still able to perform data communication. (a) When normal

The data link is performed using the forward loop (or the reverse loop).

Control station

(station No. 1)

Normal station

(station No. 2)

Normal station (station No. 6)

Reverse loop

Normal station (station No. 3)

Normal station (station No. 5)

Normal station (station No. 4)

Forward loop

Data flo

(b) When abnormal

1) Error in the forward loop (reverse loop) The data link continues using the reverse loop (forward loop).

Control station

(station No. 1)

Normal station (station No. 6)

Normal station (station No. 5)

Normal station

(station No. 2)

Cable disconnection

Normal station (station No. 3)

Normal station (station No. 4)

2) When some of the stations are down The data link continues excluding the stations that are down. When two or more stations are down, the data link cannot be performed with the station located between the stations that are down. However, when there are two or more stations between the stations that are down, the normal station with younger station number

Control station (station No. 1)

Normal station (station No. 2)

Loopback

becomes the sub-control station to continue the data link.

Loopback

Normal station (station No. 6)

Normal station (station No. 3)

Down

Normal station (station No. 5)

Normal station (station No. 4)

Communication

disabled

Control station (station No. 1)

Normal station (station No. 2)

Down

Normal station (station No. 6)

Normal station (station No. 3)

Down

Normal station

(station No. 5)

Normal station

(station No. 4)

Sub-control

station

3 - 21 3 - 21

3 SPECIFICATIONS

1) When the cable is inserted or removed, the line (forward loop/reverse

loop) may be switched, but the data link will be performed normally.

2) When the loopback is being executed due to a cable disconnection,

both the forward and reverse loops may be recognized as normal

depending on the condition of the cable disconnection. Whether the forward/reverse loop is normal/abnormal is determined by the status of "RD" (receive) of the loopback station.

(Example) In the cases described below, the data link continue by dividing the network into two loops: "1M

P1-1NS5-1NS6" and "1NS2-1NS3-1NS4."

1: Forward loop normal/reverse loop normal

5: Forward loop normal/reverse loop normal

6: Forward loop normal/reverse loop normal

<Loop containing 1N

2: Forward loop "RD" abnormal/reverse loop normal

3: Forward loop normal/reverse loop normal

4: Forward loop normal/reverse loop "RD" abnormal

2-1NS3-1NS4>

An RD abnormal detection in the forward loop Loopback with the reverse loop

Sub-control station

MELSEC-Q

Forward loop normal Reverse loop normal

Forward loop abnormal Reverse loop abnormal

Control station

1MP1

Loopback

Forward

Normal station Normal station Normal station

Forward

Reverse SDReverse

Reverse RDReverse

1NS6 1NS5 1NS4

Normal station Normal station

1NS2 1NS3

Loopback

Forward

Reverse SDReverse

Forward

Reverse RDReverse

Loopback Loopback

Forward

Reverse SDReverse

Forward

Reverse RDReverse

Forward

An RD abnormal detection in the reverse loop Loopback with the forward loop

3 - 22 3 - 22

3 SPECIFICATIONS

REMARKS

If the network module has become faulty, a loopback may not be made depending on the fault. In this case, the data link may become deactivated. Identify the faulty network module in the following method. (1) Check the LED indications (RUN LED off, ERR. LED on) of all network modules

(2) Turn off the power to all stations, then turn it on in order from the control station.

Replace any network module in which malfunction has been detected, and confirm that the data link is properly recovered.

MELSEC-Q

for a faulty station.

In this process, check to which station of the network loopback is properly executed. Confirm in the Link information of the Network diagnostics (Host information) screen that the control station and the normal station returned to the network is displayed as loopback stations. (Refer to Section 8.1.1.)

3 - 23 3 - 23

3 SPECIFICATIONS

(5) Prevention of station failure by using external power supply (Optical

MELSEC-Q

loop system)

Direct power supply (24 V DC) from outside to network modules will prevent the loopback operation. Because of this, station(s) placed between faulty stations will not go down when more than one station go down, (The QJ71LP21S-25 is the network module where power can be supplied from outside.) Even if the distance between normally operating stations (1Ns2 and 1Ns4, 1Ns4 and 1Ns6) is 1 km or more, normal data link will be available

(a) Precautions for operation

If the external power supply of the network module is powered on while the CPU module power supply is off, the network module will not normally operate. Power on the CPU module and the external power supply then start system operations.

REMARKS

Even if the CPU module on the control station is powered off, the control station will not shift to a normal station because the network module operates normally.

3 - 24 3 - 24

3 SPECIFICATIONS

(6) Station detach function (coaxial bus system and twisted bus

MELSEC-Q

system)

In the coaxial bus system and twisted bus system, even if the power to a connected station is turned off, the data link continues between other stations which are still able to perform data communication.

(a) When normal

Control station (station No. 1)

Normal station (statio n No. 2)

Normal station (station No. 3)

Normal station (station No. 4)

Terminating resistor

Terminating resisto

(b) When abnormal

The data link continues excluding the station that is down.

Down

Control station (statio n No. 1)

Normal station (statio n No. 2)

Normal station (station No. 3)

Normal station (station No. 4)

POINT

When a cable disconnection occurs, the data link cannot be performed because there will be no terminating resistors.

Control station (station No. 1)

Normal station (station No. 2)

Normal station (station No. 3)

Cable disconnection

Normal st ation (station No. 4)

In addition, even if the cable is normal, the data link cannot be performed if a terminating resistor is detached.

3 - 25 3 - 25

3 SPECIFICATIONS

(7) Transient transmission enabled even at CPU module error

MELSEC-Q

By using this function, the network module can continue the transient transmission even if an error that stops the CPU module occurs while the system is operating. The description of the error of the corresponding station can be checked from other stations using GX Developer.

OPERATION ERROR

QCPU

Power supply

QCPU

Power supply

QJ71 LP21

Power supply

QCPU

Power supply

QCPU

QJ71 LP21

GX Develope

The following table lists the operations of the cyclic and transient transmissions for each CPU module status.

CPU module status

Battery error Annunciator error ON, etc. (Continue error)

Parameter error Instruction code error, etc. (Stop error)

CPU reset, etc. (MAIN CPU down)

Rank

Minor error Continued Enabled

Medium error Stopped Enabled

Major error Stopped Disabled

Cyclic transmission Transient transmission

1 When the CPU module on the target station is an ACPU, a communication

error occurs. In case of the QCPU and QnACPU, a CC-Link IE Controller Network, CCLink IE Field Network, MELSECNET/H, MELSECNET/10 error is returned.

3 - 26 3 - 26

3 SPECIFICATIONS

(8) Checking the transient transmission abnormal detection time

SEND

Request source

Q25H

QJ71

CPU

LP21

MELSEC-Q

By using this function, the "Time," "Abnormal detection network number," and "Abnormal detection station number" can be checked when a transient transmission (SEND, READ, SREAD, WRITE, SWRITE, REQ and other instructions) ends abnormally. Logs such as time logs can be used to identify the network problems. For details of these instructions, refer to Section 7.4.5.

QJ71

Q25H

LP21

CPU

Power supply

Q25H

CPU

Power supply

QJ71 LP21

Power supply

Q25H

CPU

Power supply

QJ71 LP21

QJ71 BR11

Abnormal detection station

Q25H

QJ71

CPU

BR11

Power supply

Request destination

3 - 27 3 - 27

3 SPECIFICATIONS

(9) Diagnostic function

The diagnostic function is used to check the network's line status and the module setting status. The diagnostic function consists mainly of following two types of tests:

• Offline tests

• Online tests

POINT

Execute the online tests when the network module is communicating (T.PASS LED is on). An error occurs if any of the online tests is executed from a station that has been disconnected from the data link.

Item Description

Checks hardware including the send/receive circuits and the

Self-loopback test

Internal self-loopback test

Hardware test Checks hardware inside the network module.

Station-to-station test Checks a line between two stations.

Forward loop/reverse

loop test

Item Description

Loop test Checks the line status.

Setup confirmation test

Station order check test

Communication test

1: The setup confirmation test cannot be executed in the twisted bus system.

cables of the transmission system of an individual network

module.

Checks hardware including the send/receive circuits of the

transmission system of an individual network module.

Checks the wiring status of the forward and reverse loops in

the status in which all the stations are connected.

Checks for duplicate control stations and

station numbers.

Checks the order of stations connected

in the directions of the forward and

reverse loop.

Checks whether or not the transient

transmission can be performed normally.

It also checks the routing parameter

settings.

1) Offline tests The network module's hardware and the data link cable wiring can be checked at the system startup by setting the network module or GX Developer to the test mode.

2) Online tests The status of a line and other items can be easily checked with GX Developer. If an error occurs while the system is in operation, the diagnostics listed below can be executed while remaining in the online status.

Optical loop

system

Optical loop

system

Coaxial/twisted

bus system

MELSEC-Q

Coaxial/twisted

bus system

Data link status

(cyclic transmission or

transient transmission)

Pause Section 4.8.1

Pause Section 4.8.2

Pause Section 4.8.3

Continue Section 4.8.4

Reference

Section 4.5.1

Section 4.5.2

Section 4.5.3

Section 4.7.1

Section 4.7.2

Reference

section

3 - 28 3 - 28

3 SPECIFICATIONS

3.3 Specifications of the Link Data Sending/Receiving Processing Time

This section explains the link data sending/receiving processing time and how to calculate the data link transmission delay time in the MELSECNET/H network system.

3.3.1 Link data sending/receiving processing

(1) Overview of the sending/receiving processing

In the cyclic transmission, communication is performed using the LB/LW/LX/LY devices of the network module. This section explains the case when the link relay (B) is used on the CPU module side.

1) B0 on the sending station turns on.

2) By a link refresh, the B0 information is stored in the refresh data

storage area (LB) of the network module.

3) The B0 information in the refresh data storage area (LB) is stored in

the link data storage area (LB).

4) By a link scan, the B0 information in the link data storage area (LB) is

stored in the link data storage area (LB) of the network module on the receiving station.

5) The B0 information in the link data storage area (LB) is stored in the

refresh data storage area (LB).

6) By a link refresh, the B0 information is stored in the device memory

storage area (B) of the CPU module.

7) B0 on the receiving station turns on.

MELSEC-Q

QCPU

Sequence scan

Device

memory

storage ar ea

Sending station Receiving station

Network module

Link refresh

Refresh data

storage area

2 3 23

Link scan

Link data

storage area

Network module

Link data

storage area

Refresh data

storage area

Link refresh

Y10

QCPU

Sequence scan

Device

memory

storage area

1: Sets the values with the refresh parameters. 2: Sets the values with the station inherent parameters. (If the settings are not made, the

values of the common parameters are stored as is.)

3: Sets the values with the common parameters of the control station.

3 - 29 3 - 29

3 SPECIFICATIONS

(2) Link scan and link refresh

Sequence scan

MELSEC-Q

The link scan is executed "asynchronous" with the sequence scan of the CPU module. The link refresh is executed by the "END processing" of the CPU module.

END

Link refresh Link refresh Link refresh

END

Link scan

POINT

When the CPU module is powered on or reset, even if latched device (listed in "CPU side device" in the table below) data is cleared to "0" using a sequence program, the latched data may be output depending on the timing of link scan and link refresh. For how to prevent outputting latched device data, refer to "Method for disabling output" in the table below.

CPU side device Method for disabling output

Latch relay (L) Clear the device data to "0" using an

File register (R, ZR)

Extended data register (D)

initial device value

Delete all latch range settings.

( 1)

(Universal model QCPU only)

Extended link register (W)

(Universal model QCPU only)

Device within latch range

1: For initial device value setting, refer to the user’s manual (Function

Explanation, Program Fundamentals) for the CPU module used.

3 - 30 3 - 30

3 SPECIFICATIONS

(3) Link data when a communication error station or communication

MELSEC-Q

stop station occurs on the network

When a communication error or communication stop station occur on the network during the data link, the receive data from those stations immediately before the error occurrence is retained. (A "communication stop station" refers to a station whose cyclic transmission has been stopped by a peripheral device.) (a) The receive data from a communication error station or communication

stop station is retained by a normally communicating station.

(b) The receive data from other station is retained by a communication stop

station.

(Example) When a communication error has occurred to 1N

Communication

1MP1 1NS2

Cable disconnection

error station

S2 due to cable disconnection

1NS3

Cable disconnection

Link data status after disconnection

1MP11N

Link data Link data Link data

1MP1

1NS2

1MP1

1NS2

· · · · · · Area where the link data is retained

1MP1

3 - 31 3 - 31

3 SPECIFICATIONS

(4) SB/SW when a communication error station/communication stop

MELSEC-Q

station occurs on the network

The status of whether there are any communication error/communication stop stations on the network can be checked with the link special relay/link special register (SB/SW). Use them as interlocks for programs. For interlock program examples, refer to Section 6.1.2.

Link special relays and registers

Link special

relay/link

special

SB0020

SB0047 Shows the baton pass execution status of the host.

SB0049 Shows the cyclic transmission status of the host. Normal Abnormal

SB0070

SW0070 to

0073

SB0074

SW0074 to

0077

Shows the communication status between the

network module and CPU module.

Shows the baton pass execution status of all

stations (including the host). However, it only shows

the status for the number of stations set with

parameters.

Shows the baton pass execution status of each

station.

Each bit corresponds to the status of each station.

Shows the cyclic transmission status of all stations

(including the host). However, it only shows the

status for the number of stations set with

parameters.

Shows the cyclic transmission status of each station.

Each bit corresponds to the status of each station.

Description

Signal status

Off On

Normal Abnormal

The baton

pass is being

executed

The baton

pass is being

executed on

all stations

The baton

pass is being

executed

All stations

normal

Normal Abnormal

SB007A

The baton

pass is

stopped

Occurrence

communicati-

on stop

station

The baton

pass is

stopped

Occurrence

of abnormal

station

SB007A,

007B

SW01FC to

SW01FF

*1: Signals for the stations in other than a redundant system are off.

Shows the low-speed cyclic transmission status.

The transmission completion is indicated by the

on/off status of either bit SB007A or 007B.

Indicates the redundant system status (control

system/standby system) of each station. Each bit

corresponds to the status of each station.

SB007B

Low-speed cyclic interval

Control

system

Standby

system

3 - 32 3 - 32

3 SPECIFICATIONS

3.3.2 How to calculate the transmission delay time

(1) Transmission delay time in the same network

(a) Cyclic transmission (LB/LW/LX/LY periodical communication)

The transmission delay time in the B/W/Y communication is obtained by the equation below using the following variables:

• Scan time for the sending and receiving stations (except link refresh time)

• Link refresh time

• Link scan time

• Tracking time

• Scan time delay due to tracking transfer

1) When a non-redundant CPU receives data T (MAX : T

2) When a redundant CPU receives data

TD1 = ST + T + (LS 0.5) + (SR + R + Ts) 1.5 [ms] (MAX : T

POINT

(1) For the transmission delay time in the B/W/Y communication (TD1), use the

(2) When the "Block send/receive data assurance per station" boxes is checked,

(3) In the MELSECNET/H Extended mode, the "Block send/receive data assurance

[Transmission delay time (TD1) in B/W/Y communication]

= ST +

+ (LS 0.5) + (SR +



= ST +

T : Scan time of the sending station (except link refresh time)

R : Scan time of the receiving station (except link refresh time)

T : Link refresh time of the sending station 1



R : Link refresh time of the receiving station 1



+ (LS 1) + (SR +



+ (LS 1) + (SR +



LS : Link scan time Ts : Scan time delay due to tracking transfer

1: Total of installed network modules

2: For the scan time delay due to tracking transfer, refer to the

QnPRHCPU User's Manual (Redundant System).

The equation above assumes the following conditions:

• There is no faulty station.

• The transient transmission is not executed.

equation for the "MAX" if the worst conditions coincide because the scan of the sequence program and the link scan are asynchronous.

add the following delay time to the transmission delay time (T

• In the case of S Normal : Add "+ 0.5 MAX : Add "+ 1.0

T >LS

(ST + T)"

T <LS

LS"

per station" boxes are preset by default. Therefore, add any of the values shown in (2) above to the transmission delay time (T

) 1.5 [ms]



) 2)

+ Ts) 2)

D1).

MELSEC-Q

D1).

3 - 33 3 - 33

3 SPECIFICATIONS

MELSEC-Q

(b) Communication with the SEND/RECV/RECVS/ZNRD/ZNWR instruction

The transmission delay time in communication with the SEND, RECV, RECVS, ZNRD, or ZNWR instruction depends on the system of the sending and receiving stations, as shown below.

Receiving station

Sending station

Non-redundant system Expression of 1)

Redundant system

Non-redundant system

Expression of 2)

(Note that the TsR value

is "0.")

Redundant system

(control system CPU)

Expression of 2)

(Note that the TsT value

is "0.")

Expression of 2)

The transmission delay time can be calculated using the following:

• Scan time for the sending and receiving stations (except link refresh time)

• Link refresh time

• Link scan time

• Scan time delay due to tracking transfer

[Transmission delay time in SEND, RECV, RECVS, ZNRD, or ZNWR instruction communication]

1) TD2 = (ST + T + SR + R) 2 + (LS 4) + LSU [ms] (MAX : T

2) T

= (S

(MAX : T

= (ST + T + SR + R) 2 + (LS 6) + LSU)

+ Ts



= (ST +T + TsT + SR + R TsR) 2 + (LS 6)+LSU)

T : Scan time of the sending station (except link refresh time)

R : Scan time of the receiving station (except link refresh time)



T : Link refresh time of the sending station 2



R : Link refresh time of the receiving station 2

T : Scan time delay due to tracking transfer on the sending side 3

R : Scan time delay due to tracking transfer on the receiving side 3

T +SR

+TsR) 2+(LS 4) + LS



[ms]

LS : Link scan time

(Number of simultaneous transient requests)

(Maximum number of transient times)

– 1

(LS 2)

Number of simultaneous transient requests: The total number of times transient requests that are made during one link scan from a station on the same network. Maximum number of transients: The maximum number of transients within one link scan set in the supplementary settings of the common parameters.

1: The fraction is rounded up to the nearest whole number. 2: Total of installed network modules

3: For the scan time delay due to tracking transfer, refer to the

QnPRHCPU User's Manual (Redundant System).

3 - 34 3 - 34

3 SPECIFICATIONS

REMARKS

When executing transient transmissions from multiple stations at the same time, the execution time of the instruction may be shortened by increasing the setting value for the maximum number of transient requests in one link scan. For instance, when there are seven stations that execute an instruction, the time for "LS requests from the default value of two to seven or larger with the transient setting in the supplementary settings of the common parameters of GX Developer. Note, however, that the scan time of the CPU module increases by that time amount.

communication The transmission delay time in communication with the READ, WRITE, REQ, RRUN, RSTOP, RTMRD, or RTMWR instruction depends on the system of the

Receiving

station

Sending

station

Non-redundant

system

Redundant system Expression of 2)

Non-redundant

Expression of 1) Expression of 2)

(Note that the Ts

value is "0.")

sending and receiving stations.

system

The transmission delay time in instruction communication can be calculated from the following:

• Scan time of the sending and receiving stations (except link refresh time)

• Link refresh time

• Link scan time

• Scan time delay due to tracking transfer

[Transmission delay time in READ/WRITE/REQ/RRUN/RSTOP/ RTMRD/RTMWR instruction communication]

1) T

(MAX : T

2) TD5 = (S (MAX : T

3) TD6 = (S (MAX : T

MELSEC-Q

4" may be shortened by changing the setting value of the maximum transient

Redundant system

Host system Other system

Access to control

system CPU

(Note that the Ts

value is "0.")

Expression of 2) Expression of 2)

= (ST +

+ SR +



= (ST +

+ Ts



= (ST +

+ T + Ts

= (ST +T + TsT + SR + R TsR) 2 (LS 6) + 6 + LSU)



Access to standby

system CPU

Expression of 2)

(Note that the

values of Ts

and α

(However, the

values of S

R are "0.")

) 2 + (LS 4) + LSU [ms]



+ SR +



T +SR

+ TsT + SR +

T +SR



+ R +TsR) 2 (LS 4) + 3 + LSU [ms]

T, SR,

R are "0.")

R, and

) 2 + (LS 6) + LSU)

+TsR) 2 (LS 4) + LSU [ms]





Access to standby

system CPU via

control system

Expression of 3)

(Note that the Ts

value is "0.")

Expression of 3) Expression of 3)

) 2 + (LS 6) + LSU)

Access to control

system CPU via

standby system

Expression of 3)

(Note that the

values of Ts

and α

(Note that the

values of S

R are "0.")

T, SR,

R are "0.")

R, and

(To next page)

3 - 35 3 - 35

3 SPECIFICATIONS

MELSEC-Q

T : Scan time of the sending station (except link refresh time)

R : Scan time of the receiving station 1 (except link refresh time)



T : Link refresh time of the sending station 2



R : Link refresh time of the receiving station 2

LS : Link scan time Ts

T : Scan time delay due to tracking transfer on the sending side 4

R : Scan time delay due to tracking transfer on the receiving side 4

(Number of simultaneous transient requests)

(Maximum number of transient times)

– 1

(LS 2)

1: For the redundant system, it is a scan time of the control system CPU. 2: Total time for the installed network modules.

3: The fraction is rounded up to the nearest whole number. 4: For the scan time delay due to tracking transfer, refer to the

QnPRHCPU User's Manual (Redundant System).

REMARKS

4" may be shortened by changing the setting value of the maximum transient requests from the default value of 2 to 7 or larger in the transient setting in supplementary settings of Common parameters from GX Developer. Note, however, that the scan time of the CPU module increases by that time amount.

3 - 36 3 - 36

3 SPECIFICATIONS

MELSEC-Q

(d) Link refresh time

1) Basic model QCPU, High Performance model QCPU, Process CPU, Redundant CPU, Universal model QCPU

The link refresh time (the time delay of the END processing time in the CPU module) is obtained by the equation below using the following variables:

• Number of assignment points of the link device

• Transfer to the file registers (R, ZR), extended data register (D), and extended link register (W) on the memory card

• Inter-link data transfer

[Link refresh time]

, αR = KM1 + KM2 + LW + SW

αE = KM3

LB + LX + LY

αL = KM4 + KM5

T : Link refresh time (sending station)



R : Link refresh time (receiving station)



LB + LX + LY + SB

+ LW

[ms]

+ α

+ αL [ms]

LB : Total points of link relays (LB) refreshed by the

corresponding station

LW : Total points of link registers (LW) refreshed by the

corresponding station

: Total points of link inputs (LX) refreshed by the

corresponding station

: Total points of link outputs (LY) refreshed by the

corresponding station

Refer to Section

3.3.3.

SB : Number of points of the link special relay (SB) SW : Number of points of the link special register (SW)

: Transfer time of the file registers (R, ZR), extended data register (D), and



extended link register (W) on the memory card

: Inter-link data transfer time



KM1, KM2, KM3, KM4, KM5 : Constant

1: Total link device points that are within the range set in Refresh

parameters and that are set in Network range assignment. Note that points assigned to reserved stations are excluded.

2: Add this value only when data is refreshed to the file register on the

memory card. Do not add this value when data is refreshed to the file register on the standard RAM and the extended SRAM cassette.

3: Add this value only when the inter-link data transfer function is used.

For Universal model QCPUs, the calculation method for the data link transfer time varies. The calculation method is shown in REMARKS.

3 - 37 3 - 37

3 SPECIFICATIONS

CPU type

Basic model QCPU

High Performance model QCPU

Process CPU

Redundant CPU Q12PRH/Q25PRHCPU 130 0.41 0.53 250 130

Universal model QCPU

CPU type

Basic model QCPU

High Performance model QCPU

Process CPU

Redundant CPU Q12PRH/Q25PRHCPU

Universal model QCPU

MELSEC-Q

• When network modules are installed on the main base unit

Constant

Q00JCPU 1300 0.67 Q00CPU 1100 0.66 Q01CPU 900 0.61 Q02CPU 300 0.48 0.60 600 140 Q02H/Q06H/Q12H/Q25HCPU 130 0.41 0.53 250 130 Q02PH/Q06PH/Q12PH/ Q25PHCPU

Q00UJ/Q00U/Q01UCPU Q02UCPU Q03UD/Q03UDECPU Q04UDH/Q04UDEH/ Q06UDH/Q06UDEH/ Q10UDH/Q10UDEH/ Q13UDH/Q13UDEH/ Q20UDH/Q20UDEH/ Q26UDH/Q26UDEH/ Q50UDEH/Q100UDEHCPU Q03UDV/Q04UDV/Q06UDV/ Q13UDV/Q26UDVCPU

KM1

(×10

130 0.41 0.53 250 130

160 0.41 160 0.41 0.39

90 0.41 0.39

90 0.41 0.33

45 0.41

KM2

-3

)

(×10-3)

KM3

(×10-3)

KM4

(×10-3)

The calculation method of inter-link data transfer time differs. (Refer to

Remarks.)

KM5

(×10-3)

• When network modules are installed on the extension base unit

Constant

Q00JCPU 1300 1.50 Q00CPU 1100 1.44 Q01CPU 900 1.42 Q02CPU 300 1.20 1.32 610 280 Q02H/Q06H/Q12H/Q25HCPU 130 0.97 1.09 270 260 Q02PH/Q06PH/Q12PH/ Q25PHCPU

KM1

(×10

130 0.97 1.09 270 260

KM2

-3

)

(×10-3)

KM3

(×10-3)

KM4

(×10-3)

KM5

(×10-3)

Q00UJ/Q00U/Q01UCPU 160 1.06 Q02UCPU 160 1.06 0.39 Q03UD/Q03UDECPU 90 0.97 0.39 Q04UDH/Q04UDEH/ Q06UDH/Q06UDEH/ Q10UDH/Q10UDEH/ Q13UDH/Q13UDEH/ Q20UDH/Q20UDEH/ Q26UDH/Q26UDEH/ Q50UDEH/Q100UDEHCPU Q03UDV/Q04UDV/Q06UDV/ Q13UDV/Q26UDVCPU

90 0.97 0.33

45 0.97

The calculation

method of inter-link

data transfer time

differs. (Refer to

Remarks.)

3 - 38 3 - 38

3 SPECIFICATIONS

[Link refresh time]

2) Safety CPU

MELSEC-Q

T, R



1.85

LB + LX + LY + SB

+ LW + 1000

-3

[ms]

T : Link refresh time (sending station) R : Link refresh time (receiving station)

LB : Total points of link relays (LB) refreshed by the

corresponding station

LW : Total points of link registers (LW) refreshed by the

corresponding station

: Total points of link inputs (LX) refreshed by the

corresponding station

: Total points of link outputs (LY) refreshed by the

corresponding station

Refer to Section

3.3.3.

SB : Number of points of the link special relay (SB) SW : Number of points of the link special register (SW)

1: Total points are the sum of link devices set in refresh parameter

settings and network range settings.

The points assigned for reserved station are not included.

POINT

The values in this section are calculated on the basis that data are received from all stations during one sequence scan. When the link scan is long or when the sequence scan is short, data from all stations may not be received within one sequence scan. If this occurs, the actual link refresh time is less than the calculated value shown in this section.

3 - 39 3 - 39

3 SPECIFICATIONS

REMARKS

CPU type

Q00UJ/Q00U/Q01UCPU

Q02UCPU

Q03UD/Q03UDECPU

Q04UDH/Q04UDEH/ Q06UDH/Q06UDEH/ Q10UDH/Q10UDEH/ Q13UDH/Q13UDEH/ Q20UDH/Q20UDEH/ Q26UDH/Q26UDEH/ Q50UDEH/Q100UDEHCPU Q03UDV/Q04UDV/Q06UDV/ Q13UDV/Q26UDVCPU

CPU type

Q00UJ/Q00U/Q01UCPU

Q02UCPU

Q03UD/Q03UDECPU

Q04UDH/Q04UDEH/ Q06UDH/Q06UDEH/ Q10UDH/Q10UDEH/ Q13UDH/Q13UDEH/ Q20UDH/Q20UDEH/ Q26UDH/Q26UDEH/ Q50UDEH/Q100UDEHCPU

Q03UDV/Q04UDV/Q06UDV/

Q13UDV/Q26UDVCPU

Source (main base) →

Target (main base)

MELSEC-Q

(1) Data link transfer time (for Universal model QCPU)

Universal model QCPUs transfer interlink data in several batches. The following are the calculation formulas for the data link transfer time.

(a) Data link transfer time taken in one END

→

Source (extension base)

→

Target (extension base)

αL = KM4 + (KM5 × n1) ++LWT × KM6 [ms]

: Data link transfer time taken in one END

L

n1 : Number of lines where interlink transmission parameters are set

T : Total number of link relay (LB) points set in interlink transmission

parameters

T : Total number of link register (LW) points set in interlink transmission

parameters

KM4, KM5, KM6: Constants

1: The number of words that can be transferred in one END (N) is

restricted as follows: N = Sequence scan time (under no interlink transmission parameter setting) (

s) 0.05

KM4(×10

0.76 1.27 1.37 1.79

0.73 1.27 1.37 1.78

0.73 1.25 1.35 1.78

0.73 1.27 1.37 1.78

-3

) KM5(×10-3)

120 11

34 16.3

25 16.3

12 4

Network module mounting position

Source (main base) →

Target (extension base)

KM6(×10

-3

)

Source (extension base)

Target (main base)

3 - 40 3 - 40

3 SPECIFICATIONS

MELSEC-Q

(b) Data link transfer time required for transferring data of all

CPU type

Q00UJ/Q00U/Q01UCP 25.00 25.20 25.20 25.50

Q02UCPU 25.00 25.20 25.20 25.50

Q03UD/Q03UDECPU 22.10 22.50 22.70 23.00

Q04UDH/Q04UDEH/

Q06UDH/Q06UDEH/

Q10UDH/Q10UDEH/

Q13UDH/Q13UDEH/

Q20UDH/Q20UDEH/

Q26UDH/Q26UDEH/

Q50UDEH/Q100UDEHCPU

Q03UDV/Q04UDV/Q06UDV/

Q13UDV/Q26UDVCPU

Source (main base)

Target (main base)

22.10 22.50 22.70 23.00

the set points

αL1 = KM7× +LWT [ms]

: Data link transfer time taken to transfer all the set points of data

L1

T : Total number of link relay (LB) points set in interlink transmission

parameters

T : Total number of link register (LW) points set in interlink transmission

parameters

KM7: Constants

Source (main base)

Target (extension base)

KM7(

Network module mounting position

10-3)

Source (extension base)

Target (main base)

Source (extension base)

Target (extension base)

3 - 41 3 - 41

3 SPECIFICATIONS

[Link scan time]

MELSEC-Q

(e) Link scan time in the optical loop system and coaxial bus system

The link scan time in the optical loop system and coaxial bus system is obtained by the equation below using the following variables:

• Network type

• Number of assignment points of the link device

• Number of connected stations

1) MELSECNET/H mode a) With a communication speed of 10Mbps

LS = KB + (0.45 total number of stations) +

b) With a communication speed of 25Mbps

LS = KB + (0.40 total number of stations) +

LB + LY + (LW 16)

+ (T 0.001) + (F 4) [ms]

LB + LY + (LW 16)

0.001

0.0004

+ (T 0.0004) + (F 4) [ms]

LS : Link scan time

Total number of

KB : Constant

stations

KB 4.0 4.5 4.9 5.3 5.7 6.2 6.6 7.0

LB : Total points of link relays (LB) used in all

LW : Total points of link registers (LW) used in all

LX : Total points of link inputs (LX) used in all

LY : Total points of link outputs (LY) used in all

T : Maximum number of bytes sent by the transient transmission in one

F : Number of stations returned to the network (Only if there are faulty

1: Total link device points set up in Network range assignment.

2: The total transfer time when transient transmissions are simultaneously

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

stations

link scan.

stations. : Maximum number of stations returned to the network in 1 scan (set value))

Note that the points assigned to reserved stations are excluded.

executed from multiple stations.

Refer to Section

3.3.3.

REMARK

For the link scan time in MELSECNET/10 mode, refer to For QnA/Q4AR MELSECNET/10 Network System Reference Manual.

3 - 42 3 - 42

3 SPECIFICATIONS

2) MELSECNET/H Extended mode a) With a communication speed of 10Mbps

[Link scan time]

MELSEC-Q

LS = KB + (0.45 SP) +

LB + LY + (LW 16)

0.001

+ (T 0.001) + (F 4) [ms]

b) With a communication speed of 25Mbps

[Link scan time]

LS = KB + (0.40 SP) +

LB + LY + (LW 16)

0.0004

+ (T 0.0004) + (F 4) [ms]

LS : Link scan time

Total number of

KB : Constant

stations

KB 4.0 4.5 4.9 5.3 5.7 6.2 6.6 7.0

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

SP=

The calculation example of SP in the setting example is shown in .

Number of bytes sent by station No. (i)

i=1

n=Total number of stations Number of bytes sent = {(LY + LB) / 8 + (2 x LW)}

1: The number after the decimal point is rounded up. 0 is handled as 1.

Setting example

Station No.

Station No. 1 Station No. 2 Station No. 3 Station No. 4

Number of bytes sent by each station

2000

8000 bytes 7800 bytes 0 bytes 2000 bytes

Calculation example of SP

SP=

8000

7800

2000

200002000

=4 + 4 + 1 + 1 =10

Number after decimal point is rounded up.

2000 2000

0 is handled as 1.

LB : Total points of link relays (LB) used in all

stations

LW : Total points of link registers (LW) used in all

stations

LX : Total points of link inputs (LX) used in all

stations

Refer to Section

3.3.3.

LY : Total points of link outputs (LY) used in all

stations

T : Maximum number of bytes sent by the transient transmission in one

link scan.

F : Number of stations returned to the network (Only if there are faulty

stations. : Maximum number of stations returned to the network in 1 scan (set value))

2: Total link device points set up in the network range parameter

assignment. Note that the points assigned to reserved stations are excluded.

3: "0" when not used.

3 - 43 3 - 43

3 SPECIFICATIONS

[Link scan time]

LS = KB1+(KB2 total number of stations) + KB3

MELSEC-Q

(f) Link scan time in the twisted bus system

The link scan time in the twisted bus system is obtained by the equation below using the following variables:

• Network type

• Number of assignment points of the link device

• Constant 1 to 3

1) MELSECNET/H mode

LB+LX+(LW 16)

+ (T KB3) + (F 4)

[Link scan time]

LS = KB1+(KB2 SP) + KB3

Total number of stations 1 to 8 9 to 16 17 to 24 25 to 32

KB1 8.0 8.5 8.9 9.3

Communication speed 156kbps 312kbps 625kbps 1.25Mbps 2.5Mbps 5Mbps 10Mbps

KB2 4.6 3.83 3.06 2.55 2.05 1.55 1.05

Communication speed 156kbps 312kbps 625kbps 1.25Mbps 2.5Mbps 5Mbps 10Mbps

KB3 0.064 0.032 0.016 0.008 0.004 0.002 0.001

2) MELSECNET/H Extended mode

LB+LX+(LW 16)

LS : Link scan time KB1 to 3: Constant

LB : Total points of link relays (LB) used in all

stations

LW : Total points of link registers (LW) used in all

stations

LX : Total points of link inputs (LX) used in all

stations

LY : Total points of link outputs (LY) used in all

stations

T : Maximum number of bytes sent by the transient transmission in one

link scan.

F : Number of stations returned to the network (Only if there are faulty

stations. : Maximum number of stations returned to the network in 1 scan (set value))

SP : Refer to Section 3.3.3 (e).

1: Total link device points set up in the network range parameter

assignment. Note that the points assigned to reserved stations are excluded.

2: "0" when not used.

+ (T KB3) + (F 4) [ms]

[ms]

Refer to Section

3.3.3.

3 - 44 3 - 44

3 SPECIFICATIONS

(2) Transmission delay time between multiple networks using the inter-

[Inter-link data transfer]

(Transmission delay time)

(Transmission delay time)...For Universal model QCPU

T : Scan time of the sending station (except link refresh time)

S S

R : Scan time of the receiving station (except link refresh time)

T : Link refresh time of the transmitting station 1 MT : Link refresh time of the relay station and the sending station (for transfer) 1 MR : Link refresh time of the relay station and the receiving station (for transfer) 1 R : Link refresh time of the receiving station 1

T : Link scan time of the sending station

R : Link scan time of the receiving station

M : Transmission processing time of the CPU module of the relay station

MELSEC-Q

link data transfer function

The following shows the cyclic transmission delay time for the case where link device data are transferred to another network with the interlink transfer function.

TD = (ST +

= (ST +

1: Total for the network modules mounted

) + (LST 1) +



) + (LS



1) +

+ KM +



MR + MT +

+ (LSR 1) + (SR 2) +



(LSR 1) + (S

2) +

[ms]



[ms]



KM = KM6

LB 16

+ LW

1000 + KM7 [ms]

LB : Total of transfer source LB points that are set with interlink transmission

parameters.

LW : Total of transfer source LW points that are set with interlink transmission

parameters.

KM6 : Constant

Transfer source module Transfer target module

Main base unit Main base unit 6.7

Main base unit Extension base unit 10.00

Extension base unit Main base unit 10.00

Extension base unit Extension base unit 12.00

KM7 : 4.5 (Worst value: 60)

Module location

KM6 (

10-3)

POINT

Although KM7 is usually 4.5ms, it can be 60ms if monitoring or a dedicated instruction is executed from GX Developer or any other station. Depending on the monitoring timing from GX Developer or another station, the time may be longer than that. If the time increase may cause a system problem, use link direct devices in the sequence program to transfer data.

3 - 45 3 - 45

3 SPECIFICATIONS

(3) Example of the transmission delay time calculation

CPU type

Q06HCPU 130 0.41 0.53 250 130

Link refresh time = KM1 + KM2 ×

MELSEC-Q

The following example calculates the transmission delay time with the following system configuration and under the following conditions:

(System configuration and conditions)

1) CPU module: Q06HCPU

2) Network type: MELSECNET/H mode

3) Communication speed: 10Mbps

4) Total number of stations: 8 stations (1 control station, 7 normal stations)

5) Number of link device points: LB = 1024 points, LW = 1024 points, LX = LY = 0 points, SB = SW = 512 points

6) Scan time of the CPU module for all stations: 1 ms

7) The file register is not used.

8) The data inter-link transfer and the transient transmission are not used.

9) The network modules are installed on the basic base unit on all stations.

Constant

KM1

(×10

-3

)

KM2

(×10-3)

KM3

(×10-3)

KM4

(×10-3)

KM5

(×10-3)

(a) Link refresh time

LB + LX +LY + SB

+ LW + SW

+ α

The link refresh time on the sending station α

= 130 × 10

1024 + 0 + 0 + 512

-3

+ 0.41 × 10

-3

+ 1024 + 512 + 0 + 0

0.80 (ms)

The link refresh time on the receiving station α

0.80 (ms)

(b) Link scan time

Link scan time LS = KB + (0.45 total number of stations)

(LB + LY + (LW 16)

0.001

= 4.0 + (0.45 8)

1024 + 0 + (1024 16)

9.776 (m s )

0.001

Transmission delay time T

D1 = ST + T + (LS 0.5) + (SR + R) 1.5

= 1 + 0.80 + (9.776

9.39 (ms)

0.5) + (1 + 0.80) 15

3 - 46 3 - 46

Mitsubishi QJ71NT11B, QJ71LP21S-25, QJ71LP21-25, QJ71LP21G, QJ71LP21GE Reference Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

• SAFETY PRECAUTIONS •

REVISIONS

INTRODUCTION

CONTENTS

MANUALS

COMPLIANCE WITH EMC AND LOW VOLTAGE DIRECTIVES

GENERIC TERMS AND ABBREVIATIONS

DEFINITIONS OF TERMINOLOGY

PACKING LIST

1 OVERVIEW

1.1 Overview

1.2 Features

1.3 Symbols Used in This Manual

2 SYSTEM CONFIGURATION

2.1 MELSECNET/H Network Configurations

2.1.1 Single network system

2.1.2 Redundant system (Redundant CPU)

2.1.3 Simple dual-structured system (High Performance model QCPU and Process CPU)

2.1.4 Multiple network system (High Performance model QCPU, Process CPU, Redundant CPU, and Universal model QCPU)

2.2 Applicable Systems

2.2.1 Precautions when using link dedicated instructions

2.2.2 Precautions when using network modules in the multiple CPU system

2.2.3 List of functions for each CPU module

2.3 Checking Serial Number and Function Version

3 SPECIFICATIONS

3.1 Performance Specifications

3.1.1 Performance specifications

3.1.2 Optical fiber cable specifications

3.1.3 Coaxial cable specifications

3.1.4 Shielded twisted pair cable specifications

3.1.5 CC-Link Ver. 1.10-compatible cable specifications

3.2 Function Specifications

3.2.1 Cyclic transmission function (periodical communication)

3.2.2 RAS function

3.3 Specifications of the Link Data Sending/Receiving Processing Time

3.3.1 Link data sending/receiving processing

3.3.2 How to calculate the transmission delay time