Mitsubishi MELSEC QJ71C24-R2 User manual

MELSEC System Q
Programmable Logic Controllers
User's Manual
(Basic)
Serial Communication Modules
QJ71C24N/-R2/-R4, QJ71C24/-R2
GX Configurator-SC
INDUSTRIAL AUTOMATION
MIT
SU
BI
S
HI ELE
C
TRI
C
MIT
SU
BI
S
HI ELE
C
TRI
C
Art. no.: 130031
01 09 2004
SH (NA)-080006
Version H

A - 1 A - 1
•SAFETY PRECAUTIONS •
(Always read these instructions before using this equipment.)
Before using this product, please read this manual and the relevant manuals introduced in this manual
carefully and pay full attention to safety to handle the product correctly.
The 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 instructions are ranked as "DANGER" and "CAUTION".
!DANGER
CAUTION
!
Indicates that incorrect handling may cause hazardous conditions,
resulting in death or severe injury.
Indicates that incorrect handling may cause hazardous conditions,
resulting in medium or slight personal injury or physical damage.
Note that the !CAUTION level may lead to a serious consequence according to the circumstances.
Always follow the instructions of both levels because they are important to personal safety.
Please save this manual to make it accessible when required and always forward it to the end user.
[Design Instructions]
!DANGER
•See manuals of each data link for the operating status of each station when there is a
communication error in the data link.
There is the risk of an accident occurring due to output error or malfunctioning.
•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 PLC system, install a call circuit with a lamp display or buzzer sound.
•When performing the control of the PLC in operation (changing data) by connecting a peripheral
devices to the CPU module or personal computer, etc. to the intelligent device module, configure an
interlock circuit in a sequence program so the safety of the overall system is always maintained.
Also when performing other controls of the PLC in operation (changing program and operation
status (status control)), read this manual carefully and confirm if the overall safety is maintained.
Especially, when this control is performed to a remote PLC from an external device, troubles
that have occurred on the PLC side may not be able to immediately be handled if there is a data
communication error.
Define a troubleshooting agreement between external devices and the PLC CPU for data
communication error occurrences, as well as construct an interlock circuit in the sequence program.
•Do not write data into the "system area" of the buffer memory of intelligent function modules.
Also, do not use any "prohibited to use" signals as an output signal to an intelligent function
module from the PLC CPU.
Writing data into the "system area" or outputting a signal for "prohibited to use" may cause a
PLC system malfunction.

A - 2 A - 2
[Design Instructions]
!CAUTION
•Do not bunch the control wires or communication cables with the main circuit or power wires, or
install them close to each other.
They should be installed 100mm(3.9inch) or more from each other.
Not doing so could result in noise that may cause malfunction.
•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 PLC
CPU.
If the power supply for the module loading station is turned off or the PLC 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 Instructions]
!CAUTION
•Use the PLC in an environment that meets the general specifications contained in the user's
manual of the CPU module to use.
Using this PLC in an environment outside the range of the general specifications may cause
electric shock, fire, malfunction, and damage to or deterioration of the product.
•While pressing the installation lever located at the bottom of module, insert the module fixing tab
into the fixing hole in the base unit until it stops. Then, securely mount the module with the fixing
hole as a supporting point.
If the module is not installed properly, it may cause the module to malfunction, fail or fall off.
Secure the module with screws especially when it is used in an environment where constant
vibrations may occur.
•Tighten the screws within the range of specified torque.
If the screws are loose, it may cause the module to fallout, short circuits, or malfunction.
If the screws are tightened too much, it may cause damage to the screw and/or the module,
resulting in fallout, short circuits or malfunction.
•Switch all phases of the external power supply off when mounting or removing the module.
Not doing so may cause damage to the module.
•Do not directly touch the conductive area or electronic components of the module.
Doing so may cause malfunction or failure in the module.

A - 3 A - 3
[Wiring Instructions]
!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.
•Be sure to fix communication cables or power supply cables leading from the module by placing
them in the duct or clamping them.
Cables not placed in the duct or without clamping may hang or shift, allowing them to be
accidentally pulled, which may cause a module malfunction and cable damage.
•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 range of specified torque.
If the terminal screws are loose, it may result in short circuits or malfunction.
If the screws are tightened too much, it may cause damage to the screw and/or the module,
resulting in fallout, short circuits or malfunction.
•When removing the communication cable or power supply cable from the module, do not pull the
cable. When removing the cable with a connector, hold the connector on the side that is
connected to the module.
When removing the cable connected to the terminal block, first loosen the screws on the part
that is connected to the terminal block.
Pulling the cable that is still connected to the module may cause malfunction or damage to the
module or cable.
•Be careful not to let foreign matters such as sawdust or wire chips get inside the module.
They may cause fires, failure or malfunction.
•The top surface of the module is covered with protective film to prevent foreign objects such as
cable offcuts from entering the module when wiring.
Do not remove this film until the wiring is complete.
Before operating the system, be sure to remove the film to provide adequate heat ventilation.

A - 4 A - 4
[Startup/Maintenance Instructions]
!CAUTION
•Do not disassemble or modify each module.
Doing so could cause failure, malfunction injury or fire.
•Switch all phases of the external power supply off when mounting or removing the module.
Not doing so may cause failure or malfunction of the module.
•Do not mount/remove the module onto/from base unit more than 50 times (IEC61131-2-
compliant), after the first use of the product.
Failure to do so may cause the module to malfunction due to poor contact of connector.
•Do not touch the connector while the power is on.
Doing so may cause malfunction.
•Switch all phases of the external power supply off when cleaning or retightening terminal screws
and module installing screws.
Not doing so may cause failure or malfunction of the module.
If the screws are loose, it may cause the module to fallout, short circuits, or malfunction.
If the screws are tightened too much, it may cause damages to the screws and/or the module,
resulting in the module falling out, short circuits or malfunction.
•Always make sure to touch the grounded metal to discharge the electricity charged in the body,
etc., before touching the module.
Failure to do so may cause a failure or malfunctions of the module.
[Operation Instructions]
!CAUTION
•When performing the control of the PLC in operation (especially changing data, program, and
operation status (status control)) by connecting a personal computer, etc. to the intelligent
function module, read this manual carefully and confirm if the overall safety is maintained.
Failure to perform correct operation s to change data, program, or the status may result in
system malfunction, machine damage, or an accident.
[Disposal Instructions]
!CAUTION
•When disposing of this product, treat it as industrial waste.

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)-080006-A First Printing
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 Logic 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
Congifurator-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

A - 6 A - 6
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
Japanese Manual Version SH-080001-L
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.
1999 MITSUBISHI ELECTRIC CORPORATION

A - 7 A - 7
INTRODUCTION
Thank you for purchasing the MELSEC-Q series PLC.
Before using the equipment, please read this manual carefully to develop full familiarity with the functions
and performance of the Q series PLC you have purchased, so as to ensure correct use.
Please forward a copy of this manual to the end user.
CONTENTS (This manual)
SAFETY PRECAUTIONS..............................................................................................................................A- 1
REVISIONS....................................................................................................................................................A- 5
CONTENTS....................................................................................................................................................A- 7
About Manuals ...............................................................................................................................................A-15
Conformation to the EMC Directive and Low Voltage Instruction................................................................A-15
The Manual’s Use and Structure...................................................................................................................A-16
About The Generic Terms and Abbreviations...............................................................................................A-19
Definitions and Descriptions of Terminology.................................................................................................A-21
Product Configuration ....................................................................................................................................A-23
1 OVERVIEW 1- 1 to 1-11
1.1 Overview of the Serial Communication Module.....................................................................................1- 1
1.2 Features of the Serial Communication Module......................................................................................1- 2
1.3 About Added/Changed Functions in Function Version B......................................................................1-10
2 SYSTEM CONFIGURATION AND AVAILABLE FUNCTIONS 2- 1 to 2-14
2.1 Applicable Systems.................................................................................................................................2- 1
2.2 Combinations of PLC CPU and External Device, and Available Functions..........................................2- 3
2.3 For Use in Multiple CPU System............................................................................................................2- 6
2.4 For Use with Q00J/Q00/Q01CPU ..........................................................................................................2- 7
2.5 For Use at MELSECNET/H Remote I/O Station....................................................................................2- 8
2.6 Checking the Function Version, Serial No., and Software Version.......................................................2-12
3 SPECIFICATIONS 3- 1 to 3-31
3.1 Performance Specifications....................................................................................................................3- 1
3.2 RS-232 Interface Specification...............................................................................................................3- 3
3.2.1 RS-232 connector specifications.....................................................................................................3- 3
3.2.2 RS-232 cable specification ..............................................................................................................3- 5
3.3 RS-422/485 Interface Specifications......................................................................................................3- 6
3.3.1 RS-422/485 terminal block specifications .......................................................................................3- 6
3.3.2 RS-422/485 cable specifications .....................................................................................................3- 7
3.3.3 Precautions when transferring data using RS-422/485 circuit .......................................................3- 8
3.4 Serial Communication Module Function List..........................................................................................3-11
3.5 Dedicated Instruction List........................................................................................................................3-12
3.6 Utility Package (GX Configurator-SC) Function List..............................................................................3-13
3.7 List of GX Developer Setting Items for Serial Communication Modules...............................................3-14
3.8 List of Input/Output Signals for the PLC CPU........................................................................................3-15
3.9 List of Applications and Assignments of the Buffer Memory.................................................................3-17

A - 8 A - 8
4 SETTINGS AND PROCEDURES PRIOR TO OPERATION 4- 1 to 33
4.1 Handling Precautions..............................................................................................................................4- 1
4.2 Settings and Procedures Prior to Operation..........................................................................................4- 2
4.3 Part Names and Functions.....................................................................................................................4- 3
4.4 External Wiring........................................................................................................................................4- 5
4.4.1 Connecting the RS-232 interface (full-duplex communications) ....................................................4- 6
4.4.2 Connecting the RS-422/485 interface.............................................................................................4- 8
4.5 Settings for GX Developer......................................................................................................................4-12
4.5.1 I/O assignment settings....................................................................................................................4-12
4.5.2 Switch settings for I/O and intelligent functional module ................................................................4-13
4.5.3 The Intelligent function module interrupt pointer setting.................................................................4-20
4.6 Settings with the Utility Package (GX Configurator-SC)........................................................................4-22
4.7 Individual Station Test.............................................................................................................................4-25
4.7.1 ROM/RAM/switch tests....................................................................................................................4-25
4.7.2 Individual station loopback test........................................................................................................4-28
4.8 Loopback Test.........................................................................................................................................4-30
4.9 Maintenance and Inspection...................................................................................................................4-32
4.9.1 Maintenance and inspection............................................................................................................4-32
4.9.2 When mounting/dismounting the module........................................................................................4-33
5 DATA COMMUNICATION USING THE MELSEC COMMUNICATION PROTOCOL 5- 1 to 5- 6
5.1 Data Communication Functions .............................................................................................................5- 1
5.1.1 Accessing the PLC CPUs using the MC protocol...........................................................................5- 1
5.1.2 Message format and control procedure for data communication...................................................5- 2
5.1.3 PLC CPU setting for performing data communication....................................................................5- 2
5.1.4 Support of multiple CPU system or redundant system...................................................................5- 3
5.1.5 Support for the QCPU remote password function ..........................................................................5- 4
5.2 Utilizing the MX Component...................................................................................................................5- 6
6 DATA COMMUNICATION USING THE NON PROCEDURE PROTOCOL 6- 1 to 6-31
6.1 Data Reception from the External Device..............................................................................................6- 2
6.1.1 Receiving methods...........................................................................................................................6- 2
6.1.2 The receive area and the received data list ....................................................................................6- 6
6.1.3 Sequence program for data reception.............................................................................................6-11
6.1.4 Receive data clear............................................................................................................................6-14
6.1.5 How to detect reception errors.........................................................................................................6-17
6.1.6 Received data count and receive complete code settings .............................................................6-20
6.2 Sending Data to the External Device .....................................................................................................6-22
6.2.1 Transmission methods.....................................................................................................................6-22
6.2.2 Arrangement and contents of the transmission area and the transmission data...........................6-23
6.2.3 Sequence program for transmission data.......................................................................................6-25
6.2.4 How to detect transmission errors...................................................................................................6-28
6.3 Data Communications Precautions........................................................................................................6-30