Mitsubishi Electric QJ71C24N User manual

Q Corresponding Serial Communication Module
User's Manual (Basic)
-QJ71C24N
-QJ71C24N-R2
-QJ71C24N-R4
-QJ71C24
-QJ71C24-R2
-GX Configurator-SC (SW2D5C-QSCU-E)

A-1 A-1
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 user's manual of the CPU module to use.
In this manual, the safety precautions are classified into two 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 the operation status of each station at communication error in each station, refer to the
respective manual for each station.
The communication error may result in an accident due to incorrect output or malfunction.
When using the notification function, the pager receiver may not be contacted due to the frequency
transmission status from the system setup environment and error on the receiver side.
To ensure the safety of the programmable controller system, install a call circuit with a lamp
display or buzzer sound.
When connecting a peripheral with the CPU module or connecting an external device, such as a
personal computer, with an intelligent function module to modify data of a running
programmable controller, configure an interlock circuit in the program to ensure that the entire
system will always operate safely.
For other forms of control (such as program modification or operating status change) of a
running programmable controller, read the relevant manuals carefully and ensure that the
operation is safe before proceeding.
Especially, when a remote programmable controller is controlled by an external device,
immediate action cannot be taken if a problem occurs in the programmable controller due to a
communication failure.
To prevent this, configure an interlock circuit in the program, and determine corrective actions to
be taken between the external device and CPU module in case of a communication failure.
!

A-2 A-2
[Design Precautions]
WARNING
Do not write any data to the "system area" of the buffer memory in the intelligent function
module.
Also, do not use any "use prohibited" signals as an output signal from the programmable
controller CPU to the intelligent function module.
Doing so may cause malfunction of the programmable controller system.
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.
When using the module while values, such as buffer memory set values, are registered in the
Flash ROM, do not turn off the power supply for the module loading station nor reset the
programmable controller CPU.
If the power supply for the module loading station is turned off or the programmable controller
CPU is reset while any values are registered, the data contents in the Flash ROM become
inconsistent and as a result the values must be set again in the buffer memory, etc. and
reregistered to the Flash ROM.
Also, this may cause failure and malfunction of the module.
[Installation Precautions]
CAUTION
Use the programmable controller in an environment that meets the general specifications 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 the
module, fully insert the module fixing projection(s) into the hole(s) in the base unit and 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 with a screw.
Tighten the screws 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 (all phases) used in the system before mounting or removing
a module.
Failure to do so may result in damage to the product.
Do not directly touch any conductive parts and electronic components of the module.
Doing so can cause malfunction or failure of the module.
!
!
!

A-3 A-3
[Wiring Precautions]
CAUTION
When turning on the power and operating the module after installation and wiring are completed,
always attach the terminal cover that comes with the product.
There is a risk of electric shock if the terminal cover is not attached.
Perform correct pressure-displacement, crimp-contact or soldering for external wire connections
using the tools specified by the manufactures.
Incorrect connection may cause short circuits, fire, or malfunction.
Attach connectors to the module securely.
Place the cables in a duct or clamp them.
If not, dangling cable may swing or inadvertently be pulled, resulting in damage to the module or
cables or malfunction due to poor contact.
Before connecting the cables, check the type o f interface to be connected.
Connecting or erroneous wiring to the wrong interface may cause failure to the module and
external devices.
Tighten the terminal screws within the specified torque range.
Undertightening the terminal screws can cause short circuit or malfunction.
Overtightening can damage the screw and/or module, resulting in drop, short circuit, or
malfunction.
When disconnecting the cable from the module, do not pull the cable by the cable part. For the
cable with connector, hold the connector part of the cable.
For the cable connected to the terminal block, loosen the terminal screw.
Pulling the cable that is still connected to the module may cause malfunction or damage to the
module or cable.
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 the film during wiring.
Remove it for heat dissipation before system operation.
!

A-4 A-4
[Startup/Maintenance Precautions]
CAUTION
Do not disassemble or modify the modules.
Doing so may cause failure, malfunction, injury, or a fire.
Shut off the external power supply (all phases) used in the system before mounting or removing
the module.
Failure to do so may cause the module to fail or malfunction.
After the first use of the product, do not mount/remove the module to/from the base unit, and the
terminal block to/from the module more than 50 times (IEC 61131-2 compliant) respectively.
Exceeding the limit may cause malfunction.
Do not touch any terminal while power is on.
Doing so may cause malfunction.
Shut off the external power supply (all phases) used in 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.
Before handling the module, touch a conducting object such as a grounded metal to discharge
the static electricity from the human body.
Failure to do so may cause the module to fail or malfunction.
[Operation Precautions]
CAUTION
When changing data and operating status, and modifying program of the running programmable
controller from an external device such as a personal computer connected to an intelligent
function module, read relevant manuals carefully and ensure the safety before operation.
Failure to perform correct operations to change data, program, or the status may result in
system malfunction, machine damage, or an accident.
[Disposal Precautions]
CAUTION
When disposing of this product, treat it as industrial waste.
!
!
!

A-5 A-5
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-6 A-6
REVISIONS
The manual number is given on the bottom left of the back cover.
Print Date Manual Number Revision
Dec., 1999 SH (NA)-080006-A First edition
Oct., 2000 SH (NA)-080006-B Add the contents of the function version B.
Correction
Contents, Entire manual (change MELSECNET/10H to MELSECNET/H),
About Manuals, About The Generic Terms and Abbreviations, Product
Configuration, Section 1.2, 1.2(8), 1.3 POINT, Section 2.2, 2.3, 2.5, 2.6,
Section 3.1, 3.6, 3.9, Section 4.2, 4.4.1(2)(a)(Figure), 4.6(1), Chapter
5(all), Section 6.1.1, 6.1.3, 6.1.4, Section 7.1.1, 7.1.2, 7.2.2, Section 8.1,
8.2.1, 8.2.2, 8.3.1, 8.3.2, Section 9.2 to 9.7, Section 10.1.1, 10.2.1,
10.3.8, 10.3.18, Appendix 1.1(2), Appendix 2(all), Appendix 3(2),
Appendix 7, Appendix 8
Addition
Entire manual (add the explanation on MELSECNET/H remote I/O
station), The Manual's Use and Structure, Section 2.1, Section
3.1(Table), Section 4.4.2(1)(d), 4.9.2, Section 8.3.2 POINT, Section
10.2.1 (7164H, 7E70H), Appendix 3(1)
Jun., 2001 SH (NA)-080006-C Put Windows base software product together from Mitsubishi
Programmable Controller MELSEC Series to Mitsubishi integrated FA
Software MELSOFT Series.
Standardize the name from software package (GPP function) to Product
name (GX Developer).
Standardize the name from utility package (QSCU) to Product name (GX
Configurator-SC).
Correction
Conformation to the EMC Directive and Low Voltage Instruction, About
the Generic Terms and Abbreviations, Product Configuration, Program
Examples (Section 6.1.4, 6.2.3, Section 7.2.3, Section 9.3, 9.5, Appendix-
8), Section 1.2(1)(d), 1.2(4)(b)(Diagram), 1.2(8)(b), 1.3, Section 2.1, 2.3,
2.4, 2.5, 2.7, Section 3.1(Table), 3.2.1(3), 3.3.3(2), 3.4(Table), 3.9,
Section 4.3, 4.5.2, Section 5.1.5(3), 5.2, Section 6.1.4, Section 8.2, 8.3.2
POINT, 8.4.2, 8.4.9(Table), 8.6.3(Table), 8.6.7(Table), Section 10.1.2(b),
10.3(Table), Appendix 1.1, 2.1, 6, 7, 9
Addition
Section 2.6, Section 8.4.4, 8.6.2(Table), Section 10.2.1(716FH, 7FEFH),
10.2.3(7FE9H), 10.3.14, Appendix 3
Feb., 2002 SH (NA)-080006-D
Addition
About The Generic Terms and Abbreviations, Section 1.2, Section 2.1,
2.7, Section 4.5.2, Section 8.2.1, 8.2.2, Section 10.2.1, Appendix 1.1, 6
Oct., 2002 SH (NA)-080006-E
Addition
The Manual's Use and Structure, About The Generic Terms and
Abbreviations, Section 1.2(1)(4), Section 2.1, 2.4, Section 5.2, Section
6.1.4, Section 9.8, Appendix 7
Jan., 2003 SH (NA)-080006-F
Addition model
QJ71C24N, QJ71C24N-R2, QJ71C24N-R4
R

A-7 A-7
The manual number is given on the bottom left of the back cover.
Print Date Manual Number Revision
Jan., 2003 SH (NA)-080006-F
Addition
SAFETY PRECAUTIONS, About Manuals, About The Generic Terms
and Abbreviations, Product Configuration, Section 1.3, Section 2.1, 2.2,
2.3, 2.5, 2.6, 2.7, Section 3.1, 3.2.1, 3.3.1, 3.6, 3.8, 3.9, Section 4.1, 4.3,
4.4, 4.5, 4.6, 4.7.1, Section 6.1.1, 6.1.2, Section 7.1, 7.2.2, Chapter 8(all),
Section 9.1, 9.6, Section 10.1.2(b), 10.1.3(1), 10.2, Appendix 1, Appendix
2.1, Appendix 3, Appendix 5, Appendix 9
Jun., 2004 SH (NA)-080006-G
Correction
About The Generic Terms and Abbreviations, Product Configuration,
Chapter 2 (all), Section 3.8, Section 4.2.2 (1), Section 5.1.3 POINT,
Section 5.1.4, Chapter 8 (screen change), Section 8.6.10, Section 10.1.1,
Section 10.2
Addition
Appendix 9
Sep., 2004 SH (NA)-080006-H
Correction
Section 1.3, Section 2.5, 2.6, Section 3.5, 3.6, 3.9, Section 4.1, Chapter 8
(screen change), Section 8.6.9, 8.6.10, Section 10.1, 10.2, Appendix 1.1
Addition
Appendix 9.12
Feb., 2005 SH (NA)-080006-I
Correction
Section 2.1 (1), Section 3.1, Section 4.5.2 (1) ©, Chapter 9 (Simultaneous
execution of dedicated instructions), Section 10.2.1
Aug., 2005 SH (NA)-080006-J
Correction
SAFETY PRECAUTIONS, Section 3.3.1, 3.3.3, Section 8.2.2,
Section 9.4, Appendix 5, Appendix 7.1, 7.2
Feb., 2006 SH (NA)-080006-K
Correction
Section 2.6, Section 3.9, Section 8.2.1, 8.3.3, Section 9.1, Appendix 5
Mar., 2006 SH (NA)-080006-L
Correction
SAFETY PRECAUTIONS, Section 1.3, Section 2.6, Section 3.2.1, 3.8,
3.9, Section 8.6.9, Section 10.2.1, 10.3.11, Appendix 1
Addition
Section 10.1.7
Jan., 2008 SH (NA)-080006-M
Change of a term
"PLC" was changed to "programmable controller".
Correction
About The Generic Terms and Abbreviations, Section 1.2, 1.3, Section
2.1, 2.5, 2.7, Section 3.2.1, 3.2.2, 3.3.1, 3.9, Section 4.1, 4.3, 4.4, 4.5.2,
4.6, 4.9.2, Section 5.1.4, 5.2, Section 6.1.6, Chapter 8, Section 9.2 to 9.8,
Section 10.1.1, 10.1.6, 10.2.1,10.2.3, 10.3.3, 10.3.4, 10.3.8, 10.3.11,
10.3.19, Appendix 1.1, Appendix 2.1, Appendix 3, Appendix 5, Appendix
7.1
Addition
Section 2.5, Appendix 1.3

A-8 A-8
The manual number is given on the bottom left of the back cover.
Print Date Manual Number Revision
May, 2008 SH (NA)-080006-N
Correction
SAFETY PRECAUTIONS, About Manuals, Compliance with the EMC
and Low Voltage Directives, About The Generic Terms and
A
bbreviations, Section 1.2, 1.3, Section 2.1 to 2.3, 2.8, Section 4.1, 4.5.2,
Section 5.1.1, Section 8.2.1, 8.3.2, 8.3.3, Section 9.8, Section 10.1.1,
10.2.1, 10.3.3, 10.3.6, Appendices 1.1, 2.1, 3
Addition
Section 2.7
June, 2009 SH (NA)-080006-O
Correction
About Manuals, Manual's Use and Structure, About The Generic Terms
and Abbreviations, Definitions and Descriptions of Terminology,
Sections 1.2, 1.3, 2.1, 2.2, 2.4 to 2.6,
2.8, 3.1, 3.2.1, 3.3.4, 3.4 to 3.6, 3.8, 3.9, 4.1 to 4.3,
4.4.2, 4.5.2, 4.5.3, 4.6, 4.7, 4.7.1, 5.1.4, 5.1.5, 6.1.2,
6.1.4, 6.2.2, 7.1.2, and 7.2.2, Chapter 9, Sections 9.1, 9.2.1, 9.2.2,
9.3.1, 9.4, 9.4.5, 9.6.1, 9.6.3, 10.2 to 10.8, 11.1.1, 11.1.2, 11.1.5,
11.1.6, 11.2.1, 11.3, 11.3.1 to 11.3.3,
and 11.3.5 to 11.3.22, Appendices 1.1, 2.1, 3, 9.6, and 10
Partial addition
Section 3.3.4, Chapter 8, Sections 9.4.9, 9.6.7, 11.3.4, and 11.3.6
Section number change
Chapters 8 to 10 9 to 11, Sections 9.6.7 to 9.6.10 9.6.8 to 9.6.11,
Sections 9.4.9 to 9.4.11 9.4.10 to 9.4.12,
Section 11.3.4 11.3.5, Sections 11.3.5 to 11.3.20 11.3.7 to 11.3.22
Apr., 2011 SH (NA)-080006-P
Correction
SAFETY PRECAUTIONS, About The Generic Terms and Abbreviations,
Sections 1.2, 1.3, 2.1, 2.2, 2.8, 3.2.1, 3.2.2, 3.3.1, 3.3.2, 3.8, 4.4, 5.2,
6.1.1, 6.1.3, 9.2.1, 9.2.2, 10.1, 10.4, 11.2.1, 11.3.3, 11.3.8, 11.3.21,
Appendices 1.1, 3, 6, 7.1
Addition
CONDITIONS OF USE FOR THE PRODUCT, Sections 8.1.5, 8.1.6, 10.7
Section number change
Section 10.8 10.9
Nov., 2012 SH (NA)-080006-Q
Correction
COMPLIANCE WITH THE EMC AND LOW VOLTAGE DIRECTIVES,
Sections 1.3, 3.2.1, 8.1.5, 8.1.6, 9.2.2, 11.2.1, 11.3.1, Appendix 3
Partial addition
Appendix 6