Mitsubishi MELSEC Q Series User manual

CC-Link System Master/Local Module User's Manual
U
User's Manual User's Manual
Mitsubishi Programmable
Logic Controller
MODEL
MODEL
CODE
QJ61BT11-U-S-E
13JL91
SH(NA)-080016-E(0305)MEE
QJ61BT11
CC-Link System Master/Local Module CC-Link System Master/Local Module
Specifications subject to change without notice.
When exported from Japan, this manual does not require application to the
Ministry of Economy, Trade and Industry for service transaction permission.
HEAD OFFICE : 1-8-12, OFFICE TOWER Z 14F HARUMI CHUO-KU 104-6212,JAPAN
NAGOYA WORKS : 1-14 , YADA-MINAMI 5-CHOME , HIGASHI-KU, NAGOYA , JAPAN

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 PRECAUTION]
!DANGER
•See Chapter 5 of this manual for each station's operating status when there is a communication
error in the data link.
•When performing the control of the PLC in operation (changing data) by connecting a personal
computer, etc. to the intelligent function module or connecting peripheral devices to the CPU
module, configure an interlock circuit in a sequence program so the safety of the overall system
is always maintained.
Before 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 PC 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.

A - 2 A - 2
[DESIGN PRECAUTION]
!DANGER
•Do not write data into the "system area" of the buffer memory of intelligent function modules.
Also, do not output the "prohibited to use" signal as the 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
system malfunction in the PLC.
•To specify the automatic refresh parameter, specify "Y" for the remote output RY refresh device.
If a value other than "Y" (for example, M or L) is specified, the status of the device will remain as
it was prior to the STOP operation when the CPU is stopped.
See Section 4.4.10 for how to stop the data link.
[DESIGN PRECAUTION]
!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.
[INSTALLATION PRECAUTIONS]
!CAUTION
•Use the PLC in an environment that meets the general specifications contained in the CPU
user's manual 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.
•When installing the module, securely insert the module fixing tabs into the mounting holes of the
base unit while pressing the installation lever located at the bottom of the module downward.
Improper installation may result in malfunction, breakdown or dropping out of the module.
Securely fix the module with screws if it is subject to vibration during use.
•Tighten the screws within the range of specified torque.
If the screws are loose, it may cause 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 PRECAUTIONS]
!CAUTION
•When turning on the power and operating the module after installing is completed, always attach
the terminal cover that comes with the product.
There is a risk of malfunction if the terminal cover is not attached.
•Tighten the terminal screws within the range of specified torque.
If the terminal screws are loose, it may cause short circuits, or malfunction.
If the terminal screws are tightened too much, it may cause damage to the screw and/or the
module, resulting in fallout, short circuits or malfunction.
•Be careful not to let foreign matters such as sawdust or wire chips get inside the module.
These 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.
•Use a dedicated cable as specified by the manufacturer for the CC-Link system. If a cable other
than the one specified by the manufacturer is used, the performance of the CC-Link system
cannot be guaranteed. Also, follow the specifications listed in Chapter 3 for the overall cable
distance and the station-to-station cable length. If wiring is done other than as specified,
accurate transmission of data cannot be guaranteed.
•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.
•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.

A - 4 A - 4
[STARTING AND MAINTENANCE PRECAUTIONS]
!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 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 installation screws.
Not doing so may cause failure or malfunction of the module.
If the screws are loose, it may cause 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 fallout, 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.
[DISPOSAL PRECAUTIONS]
!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)-080016-A First printing
Oct., 2000 SH (NA)-080016-B Add the contents of the function version B.
Change the name from MELSECNET/10H to MELSECNET/H.
Added model type
Section 2.2.3
Addition
Section 1.3, Section 2.2.4, Section 4.4.12, Appendix 5
Correction
About the Generic Terms and Abbreviations, Section 1.2, Section 2.2.1,
Section 3.1, Section 4.1, 4.4.3, 4.4.8, Section 5.1, 5.3.1, Section 6.3.1,
6.3.3, Section 7.3, Section 8.4.1, 8.4.2, Section 9.2.1, 9.2.2, 9.3, Section
11.4, Section 13.1, 13.4, Appendix 2.2, 2.3, 2.4, 2.6, Index
Jun., 2001 SH (NA)-080016-C Standardize the name from software package (GPP function) to Product
name (GX Developer).
Addition
Section 2.2.6, Section 4.2.5, 4.2.6, Section 6.1.3, 6.4, Appendix 2.7
Correction
SAFETY PRECAUTIONS, Conformation to the EMC Directive and Low
Voltage Instruction, About the Generic Terms and Abbreviations, Product
Components, Section 1.2, 1.3, Section 2.2.1, 2.2.3, 2.2.4, Section 3.2,
Section 4.1, 4.4.3, 4.4.8, Section 5.3.1, 5.3.2, 5.3.3, Section 7.1, Section
8.4.1, 8.4.2, Section 10.3.3, Section 13.1, 13.3, 13.4, Appendix 2.1, 2.2,
Appendix 3, Appendix 4
Jul., 2002 SH (NA)-080016-D Correction
Section 2.2.3, Section 4.3.5, Section 5.4.1, 5.4.2, Section 8.4.1, 8.4.2,
Section 13.4
May, 2003 SH (NA)-080016-E Addition
Section 5.4, 5.4.1
Correction
SAFETY PRECAUTIONS, Section 2.2.1, Section3.1, Section 4.4.11,
Section 5.1, Section 6.2, Section 7.2.1, 7.8, Section 8.3.1, 8.4.1, 8.4.2,
Section 13.1, 13.3, 13.4, Appendix 2.1 to 2.6
Japanese Manual Version SH-080017-G
This manual confers no industrial property rights or any rights of any other kind, nor does it confer any patent
licenses. Mitsubishi Electric Corporation cannot be held responsible for any problems involving industrial property
rights which may occur as a result of using the contents noted in this manual.
1999 MITSUBISHI ELECTRIC CORPORATION

A - 6 A - 6
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
SAFETY PRECAUTIONS..............................................................................................................................A- 1
REVISIONS....................................................................................................................................................A- 5
INTRODUCTION............................................................................................................................................A- 6
Conformation to the EMC Directive and Low Voltage Instruction................................................................A-11
About the Generic Terms and Abbreviations................................................................................................A-12
Product Components .....................................................................................................................................A-14
1 OVERVIEW 1- 1 to 1-11
1.1 Overview..................................................................................................................................................1- 1
1.2 Features ..................................................................................................................................................1- 2
1.3 About Added/Changed Functions in Function Version B......................................................................1-11
2 SYSTEM CONFIGURATION 2- 1 to 2-11
2.1 System Configuration..............................................................................................................................2- 1
2.2 Applicable System ..................................................................................................................................2- 2
2.2.1 Applicable modules and number of CPUs that can be mounted....................................................2- 2
2.2.2 Notes on the system configuration ..................................................................................................2- 4
2.2.3 Equipment list...................................................................................................................................2- 6
2.2.4 How to check the function version and serial No............................................................................2-10
2.2.5 About Version 1.10...........................................................................................................................2-10
2.2.6 About use of the QJ61BT11 with the Q00J/Q00/Q01CPU.............................................................2-11
3 SPECIFICATIONS 3- 1 to 3- 5
3.1 Performance Specifications....................................................................................................................3- 1
3.1.1 Maximum overall cable distance (for Ver. 1.00)..............................................................................3- 2
3.1.2 Maximum overall cable distance (for Ver. 1.10)..............................................................................3- 4
3.2 CC-Link Dedicated Cable .......................................................................................................................3- 5
4 FUNCTIONS 4- 1 to 4-65
4.1 Function List............................................................................................................................................4- 1
4.2 Basic Functions.......................................................................................................................................4- 3
4.2.1 Communication with the remote I/O stations ..................................................................................4- 3
4.2.2 Communication with the remote device stations.............................................................................4- 5
4.2.3 Communication with the local stations............................................................................................4-10
4.2.4 Communication with the intelligent device stations.........................................................................4-16

A - 7 A - 7
4.2.5 Parameter setting with GX Developer.............................................................................................4-22
4.2.6 Parameter setting with dedicated instruction ..................................................................................4-23
4.3 Functions for Improving System Reliability............................................................................................4-25
4.3.1 Disconnecting data link faulty stations and continuing the data link with only normal stations
(Slave station cut-off function).........................................................................................................4-25
4.3.2 Automatically reconnecting a disconnected data link faulty station when it returns to normal
(Automatic return function)..............................................................................................................4-26
4.3.3 Continuing the data link when an error occurs in the master station PLC CPU
(Data link status setting when the master station PLC CPU has an error)....................................4-27
4.3.4 Retaining the device status of a data link faulty station
(Setting the status of input data from a data link faulty station).....................................................4-28
4.3.5 Continuing the data link even when the master station is faulty (Standby master function)........4-29
4.4 Handy Functions.....................................................................................................................................4-44
4.4.1 Simplifying the initialization procedure registration of remote device stations
(Remote device station initialization procedure registration function)............................................4-44
4.4.2 Performing high-speed processing (Event issuance for the interrupt program)............................4-47
4.4.3 Enabling the data link simply by powering on (Automatic CC-Link startup) ..................................4-50
4.4.4 Communicating with intelligent device stations (Remote net mode)..............................................4-52
4.4.5 Speeding up the response from remote I/O stations (Remote I/O net mode)...............................4-53
4.4.6 Creating a program that contains modules to be added in the future
(Reserved station function)..............................................................................................................4-54
4.4.7 Powering off a station in operation without error detection
(Error invalid station setting function)..............................................................................................4-55
4.4.8 Synchronizing the link scan with the sequence scan (Scan synchronous function)......................4-56
4.4.9 Replacing modules without error detection (Temporary error invalid station setting function)......4-60
4.4.10 Checking operations for each local station (Data link stop/restart)..............................................4-61
4.4.11 Station number overlap checking function....................................................................................4-62
4.4.12 Multiple PLC System Support........................................................................................................4-63
4.5 Transient Transmission Functions .........................................................................................................4-64
4.5.1 Performing transient transmission (Dedicated instructions)...........................................................4-64
5 DATA LINK PROCESSING TIME 5- 1 to 5-25
5.1 Link Scan Time .......................................................................................................................................5- 1
5.2 Transmission Delay Time.......................................................................................................................5- 4
5.2.1 Master station remote I/O station...............................................................................................5- 4
5.2.2 Master station remote device station .........................................................................................5- 6
5.2.3 Master station local station.........................................................................................................5-11
5.2.4 Master station intelligent device station .....................................................................................5-16
5.3 Processing Time for Dedicated Instructions ..........................................................................................5-17
5.3.1 Master station local station.........................................................................................................5-17
5.3.2 Local station local station............................................................................................................5-20
5.3.3 Master station intelligent device station .....................................................................................5-21
5.4 Link Refresh Time....................................................................................................................................5-22
5.4.1 Master station/local station ...............................................................................................................5-22
5.5 Station Status at Error Occurrence..........................................................................................................5-24
5.5.1 Status of the master station, standby master station
(when the master station is operating) and remote I/O station at error occurrence......................5-24
5.5.2 Status of the remote device station, local station, standby master station
(when the local station is operating) and intelligent device station at error occurrence................5-25

A - 8 A - 8
6 PARAMETER SETTINGS 6- 1 to 6-20
6.1 Procedure from Parameter Settings to Data Link Startup.....................................................................6- 1
6.1.1 CPU parameter area and master module parameter memory.......................................................6- 1
6.1.2 Procedure from parameter settings to data link startup with GX Developer..................................6- 2
6.1.3 Procedure from parameter settings to data link startup with dedicated instruction.......................6- 2
6.2 Parameter Setting Items.........................................................................................................................6- 3
6.3 Example of Parameter Settings with GX Developer..............................................................................6- 5
6.3.1 Master station network parameter settings.....................................................................................6- 5
6.3.2 Master station automatic refresh parameter settings......................................................................6-10
6.3.3 Local station network parameter settings........................................................................................6-12
6.3.4 Local station automatic refresh parameter settings........................................................................6-14
6.4 Example of Parameter Setting with Dedicated Instruction ....................................................................6-16
7 PROCEDURE BEFORE STARTING THE DATA LINK 7- 1 to 7-18
7.1 Procedure Before Starting the Data Link ...............................................................................................7- 1
7.2 Installation ...............................................................................................................................................7- 3
7.2.1 Handling precautions .......................................................................................................................7- 3
7.2.2 Installation environment...................................................................................................................7- 3
7.3 Part Identification Nomenclature and Settings.......................................................................................7- 4
7.4 Checking the Module Status (Hardware Test).......................................................................................7- 7
7.5 Connecting the Modules Using the CC-Link Dedicated Cables............................................................7- 9
7.5.1 Wiring check.....................................................................................................................................7-10
7.6 T-Branch Connection with the CC-Link Dedicated Cable .....................................................................7-11
7.6.1 T-Branch system configuration........................................................................................................7-11
7.6.2 T-Branch communication specifications list....................................................................................7-12
7.7 Switch Settings........................................................................................................................................7-13
7.7.1 Station number setting.....................................................................................................................7-13
7.7.2 Transmission rate and mode settings .............................................................................................7-14
7.8 Checking the Connection Status (Line Test) .........................................................................................7-15
8 PROGRAMMING 8- 1 to 8-29
8.1 Precautions on Programming.................................................................................................................8- 1
8.2 I/O Signals for the PLC CPU ..................................................................................................................8- 2
8.2.1 I/O Signal list.....................................................................................................................................8- 2
8.2.2 Details of the I/O signals..................................................................................................................8- 4
8.3 Buffer Memory.........................................................................................................................................8- 5
8.3.1 Buffer memory list ............................................................................................................................8- 5
8.3.2 Buffer memory details......................................................................................................................8- 7
8.4 Link Special Relays and Registers (SB/SW) .........................................................................................8-17
8.4.1 Link special relays (SB)....................................................................................................................8-17
8.4.2 Link special registers (SW)..............................................................................................................8-22

A - 9 A - 9
9 COMMUNICATION BETWEEN THE MASTER STATION AND REMOTE I/O STATIONS 9- 1 to 9-10
9.1 Configuring a System..............................................................................................................................9- 1
9.1.1 Setting the master station ................................................................................................................9- 2
9.1.2 Setting the remote I/O stations ........................................................................................................9- 3
9.2 Setting the Master Station Parameters ..................................................................................................9- 4
9.2.1 Setting the network parameters of the master station....................................................................9- 4
9.2.2 Setting the automatic refresh parameters of the master station.....................................................9- 6
9.3 Creating a Program.................................................................................................................................9- 7
9.4 Performing the Data Link........................................................................................................................9- 9
9.4.1 Confirming the operation with the LED display...............................................................................9- 9
9.4.2 Confirming the operation with the sequence program....................................................................9-10
10 COMMUNICATION BETWEEN THE MASTER STATION AND
REMOTE DEVICE STATIONS 10- 1 to 10-17
10.1 Configuring a System .........................................................................................................................10- 1
10.1.1 Setting the master station............................................................................................................10- 2
10.1.2 Setting the remote device station................................................................................................10- 3
10.2 Setting the Master Station Parameters..............................................................................................10- 4
10.2.1 Setting the network parameters of the master station................................................................10- 4
10.2.2 Setting the automatic refresh parameters of the master station.................................................10- 6
10.3 Initial Setting of the Remote Device Station.......................................................................................10- 7
10.3.1 Setting the target station number ................................................................................................10- 7
10.3.2 Setting the regist procedure registration .....................................................................................10- 7
10.3.3 Validating the remote device station initial settings ....................................................................10-11
10.3.4 Setting with the sequence program (Reference) ........................................................................10-12
10.4 Creating a Program.............................................................................................................................10-13
10.5 Performing the Data Link....................................................................................................................10-16
10.5.1 Confirming the operation with the LED display...........................................................................10-16
10.5.2 Confirming the operation with the sequence program................................................................10-17
11 COMMUNICATION BETWEEN THE MASTER STATION AND LOCAL STATIONS 11- 1 to 11-13
11.1 Configuring a System .........................................................................................................................11- 1
11.1.1 Setting the master and local stations...........................................................................................11- 2
11.2 Setting the Master Station Parameters..............................................................................................11- 3
11.2.1 Setting the network parameters of the master station................................................................11- 3
11.2.2 Setting the automatic refresh parameters of the master station.................................................11- 5
11.3 Setting the Local Station Parameters.................................................................................................11- 6
11.3.1 Setting the network parameters of the local station....................................................................11- 6
11.3.2 Setting the automatic refresh parameters of the local station....................................................11- 8
11.4 Creating a Program.............................................................................................................................11- 9
11.5 Performing the Data Link....................................................................................................................11-12
11.5.1 Confirming the operation with the LED display...........................................................................11-12
11.5.2 Confirming the operation with the sequence program................................................................11-13

A - 10 A - 10
12 COMMUNICATION BETWEEN THE MASTER STATION AND INTELLIGENT DEVICE
STATIONS 12- 1 to 12- 2
13 TROUBLESHOOTING 13- 1 to 13-20
13.1 Verification upon Problem Occurrence ..............................................................................................13- 1
13.2 Troubleshooting Procedures When the "ERR." LED of the Master Station is Flashing or
When Normal Data cannot be Sent/Received During Data Link......................................................13- 8
13.3 Error Codes.........................................................................................................................................13-10
13.4 CC-Link Diagnostics Using the GX Developer ..................................................................................13-15
APPENDIX App- 1 to App-45
Appendix 1 External Dimensions Diagram...............................................................................................App- 1
Appendix 2 Dedicated Instruction List......................................................................................................App- 2
Appendix 2.1 RIRD instruction..............................................................................................................App- 3
Appendix 2.2 RIWT instruction .............................................................................................................App- 8
Appendix 2.3 RIRCV instruction ...........................................................................................................App-13
Appendix 2.4 RISEND instruction.........................................................................................................App-18
Appendix 2.5 RIFR instruction ..............................................................................................................App-23
Appendix 2.6 RITO instruction..............................................................................................................App-26
Appendix 2.7 RLPASET instruction......................................................................................................App-29
Appendix 3 Differences Between the New and Previous Models...........................................................App-39
Appendix 4 Precautions when Changing from AJ61QBT11 to QJ61BT11.............................................App-40
Appendix 5 Precautions when Changing from QJ61BT11 of the Function Version A to QJ61BT11
of the Function Version B......................................................................................................App-40
Appendix 6 Parameter Setting Checklist..................................................................................................App-41
Appendix 6.1 Parameter setting checklist ............................................................................................App-41
Appendix 6.2 Station information setting checklist...............................................................................App-42
Appendix 6.3 Device assignment checklist ..........................................................................................App-44
INDEX Index- 1 to Index- 4

A - 11 A - 11
Conformation to the EMC Directive and Low Voltage Instruction
For details on making Mitsubishi PLC conform to the EMC directive and low voltage instruction when
installing it in your product, please see Chapter 3, "EMC Directive and Low Voltage Instruction" of the User's
Manual (Hardware) of the CPU module to use.
The CE logo is printed on the rating plate on the main body of the PLC that conforms to the EMC directive
and low voltage instruction.
To conform this product to the EMC Directive and Low Voltage Directive, refer to the Section of "CC-Link
Modules" in Chapter 3 "EMC Directive and Low Voltage Directive" of the User’s Manual (Hardware) of the
CPU module used.

A - 12 A - 12
About the Generic Terms and Abbreviations
This manual uses the following generic terms and abbreviations to describe the QJ61BT11 Control &
Communication Link System Master/Local Module, unless otherwise specified.
Generic Term/Abbreviation Description
QJ61BT11 Abbreviation for QJ61BT11 Control & Communication Link System Master/Local
Module
Cyclic transmission Transmission method by which to periodically communicate the contents of remote
I/O and remote registers.
Transient transmission Transmission method with which the counterpart is specified and 1:1 communication
is used at an arbitrary timing.
Master station Station that controls the data link system.
One master station is required for each system.
Local station Station having a PLC CPU and the ability to communicate with the master and other
local stations.
Remote I/O station Remote station that handles bit unit data only. (Performs input and output with
external devices.) (AJ65BTB1-16D, AJ65SBTB1-16D)
Remote device station Remote station that handles bit unit and word unit data only. (Performs input and
output with external devices, and analog data conversion.)
(AJ65BT-64AD, AJ65BT-64DAV, AJ65BT-64DAI)
Remote station Generic term for remote I/O station and remote device station.
(Controlled by the master station)
Intelligent device station Station that can perform transient transmission, such as the AJ65BT-R2 (including
local stations).
Standby master station Backup station for data link control when the link to the master station is disconnected
due to a PLC CPU or power supply problem.
Master/local module Generic term for QJ61BT11, AJ61BT11, A1SJ61BT11, AJ61QBT11, and
A1SJ61QBT11
Master module Generic term for QJ61BT11, AJ61BT11, A1SJ61BT11, AJ61QBT11, and
A1SJ61QBT11 when they are used as master stations.
Local module Generic term for QJ61BT11, AJ61BT11, A1SJ61BT11, AJ61QBT11, and
A1SJ61QBT11 when they are used as local stations.
Remote module Generic term for AJ65BTB1-16D, AJ65SBTB1-16D, AJ65BT-64AD, AJ65BT-64DAV,
AJ65BT-64DAI, and A852GOT
Intelligent device module Module that can perform transient transmission, such as the AJ65BT-R2 (including
local module).
Remote I/O net mode Dedicated mode for sending and receiving data to and from the remote I/O station at
high speed.
Remote net mode Mode that can communicate with all stations used for CC-Link (remote I/O station,
remote device station, local station, intelligent device station, and standby master
station)
SB Link special relay (for CC-Link)
Bit unit information that indicates the module operating status and data link status of
the master station/local station. (Expressed as SB for convenience)
SW Link special register (for CC-Link)
16-bit unit information that indicates the module operating status and data link status
of the master station/local station. (Expressed as SW for convenience)
RX Remote input (for CC-Link)
Information entered in bit units from the remote station to the master station.
(Expressed as RX for convenience)
RY Remote output (for CC-Link) Information output in bit units from the master station to the remote station.
(Expressed as RY for convenience)

A - 13 A - 13
Generic Term/Abbreviation Description
RWw Remote register (Write area for CC-Link) Information output in 16-bit units from the master station to the remote device station.
(Expressed as RWw for convenience)
RWr Remote register (Read area for CC-Link) Information entered in 16-bit units from the remote device station to the master
station. (Expressed as RWr for convenience)
ACPU
Generic term for AOJ2HCPU, A1SCPU, A1SHCPU, A1SJCPU-S3, A1SJHCPU,
A2SCPU, A2SHCPU, A2USCPU, A2USCPU-S1, A2USHCPU-S1, A1NCPU,
A2NCPU, A2NCPU-S1, A3NCPU, A2ACPU, A2ACPU-S1, A3ACPU, A2UCPU,
A2UCPU-S1, A3UCPU and A4UCPU
AnUCPU Generic term for A2USCPU, A2USCPU-S1, A2USHCPU-S1, A2UCPU, A2UCPU-S1,
A3UCPU and A4UCPU
QnACPU Generic term for Q2ASCPU, Q2ASCPU-S1, Q2ASHCPU, Q2ASHCPU-S1, Q2ACPU,
Q2ACPU-S1, Q3ACPU, Q4ACPU and Q4ARCPU
QCPU (Q mdoe) Generic term for Q00JCPU, Q00CPU, Q01CPU, Q02CPU, Q02HCPU, Q06HCPU,
Q12HCPU and Q25HCPU
QCPU (A mode) Generic term for Q02CPU-A, Q02HCPU-A, Q06HCPU-A
GX Developer Generic product name of the product types SWnD5C-GPPW-E, SWnD5C-GPPW-EA, SWnD5C-GPPW-EV and SWnD5C-GPPW-EVA. ("n" in the model name is 4 or
greater)
Intelligent function module Q series modules other than the CPU module, power supply module and I/O module
that are mounted on the base unit.
Special function module A series and QnA series modules that are mounted on the base unit, excluding the
CPU module, power supply module and I/O module.

A - 14 A - 14
Product Components
The components of the QJ61BT11 are listed below.
Item name Quantity
QJ61BT11 main unit 1
Terminal resistor 110 Ω, 1/2 W (brown-brown-brown)
(used when wiring with the CC-Link dedicated cable or Version 1.10 compatible CC-Link
dedicated cable) 2
Terminal resistor 130 Ω, 1/2 W (brown-orange-brown)
(used when wiring with the CC-Link dedicated high performance cable) 2

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MELSEC-Q
1 OVERVIEW
1
1 OVERVIEW
This manual describes the specifications, parts names and settings of the QJ61BT11
Control & Communication Link System Master/Local Module (hereinafter referred to as
the QJ61BT11) which is used with the MELSEC-Q series PLC CPUs.
1.1 Overview
CC-Link is the abbreviation of the Control & Communication Link in this manual.
Throughout this manual, it will be referred to as CC-Link.
The CC-Link system connects distributed modules such as an I/O module, an intelligent
function module, and a special function module using dedicated cables so that these
modules can be controlled by the PLC CPU.
(1) By distributing each module to an equipment device such as a conveyor line and a
machine device, the wiring efficiency of the entire system can be accomplished.
(2) On/off information of input/output and numeric data that are handled by modules
can easily be sent and received at high-speed.
(3) By connecting multiple PLC CPUs, a simple distributed system can be configured.
(4) By connecting various devices made by Mitsubishi's partner manufacturers, the
system can provide flexible solutions to meet a wide range of user needs.
PLC CPU
Master station
Local station
Remote I/O station
Remote device station
Intelligent device station
Remote I/O station
Device manufactured by one of our
partner manufacturers
PLC CPU
Master station ................The station that controls the data link system.
Remote I/O station ........The remote station that handles bit unit data only.
Remote device station ....The remote station that handles bit unit and word unit data
only.
Local station ..................The station having a PLC CPU and the ability to communicate
with the master and other local stations.
Intelligent device station ..The station that can perform transient transmission.

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MELSEC-Q
1 OVERVIEW
1
1.2 Features
The features of the CC-Link are described below.
(1) Remote I/O station communication
The ON/OFF status of a switch or indicator lamp is communicated using the
remote input RX and remote output RY (see Section 4.2.1).
Input
Output
Remote input
RX
Remote output
RY
X
Y
Master stationPLC CPU Remote I/O station
Link scan
Link scan
Automatic refresh
Automatic refresh
(2) Remote device station communication
Signals for handshaking with the remote device station (initial request, error
occurred flag, etc.) are communicated using the remote input RX and remote
output RY. The setting data to the remote device station are communicated using
remote registers RWw and RWr (see Section 4.2.2).
PLC CPU
X
Y
D
D
Master station
Remote
input
(RX)
Remote
output
(RY)
Remote
register
(RWw)
Remote
register
(RWr)
Automatic refresh
Automatic refresh
Automatic refresh
Automatic refresh
Link scan
Link scan
Link scan
Link scan
Remote device station
Voltmeter
Remote
input
(RX)
Remote
output
(RY)
Remote
register
(RWw)
Remote
register
(RWr)

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MELSEC-Q
1 OVERVIEW
(3) Local station communication
Communication between the master station and the local station uses two types
of transmission methods: cyclic transmission and transient transmission (see
Section 4.2.3).
(a) Cyclic transmission
Data communication between the PLC CPUs can be performed in N:N
mode using bit data (remote input RX and remote output RY) and word data
(remote registers RWw and RWr).
PLC CPU
X
Y
D
D
Master station
X
Y
D
D
Remote
output
(RY)
Remote
input
(RX)
Remote
register
(RWw)
Remote
register
(RWr)
Remote
input
(RX)
Remote
output
(RY)
Remote
register
(RWw)
Remote
register
(RWr)
Automatic refresh
Automatic refresh
Automatic refresh
Automatic refresh
Link scan
Link scan
Link scan
Link scan
Automatic refresh
Automatic refresh
Automatic refresh
Automatic refresh
PLC CPU
Local station
(b) Transient transmission
Read (RIRD) or write (RIWT) operation of the local station buffer memory
and CPU device can be performed at any timing.
Master stationPLC CPU Local station
Transient transmission
PLC CPU
Transient transmission
Transient transmission
Transient transmission
Transient
transmission
area
Transient
transmission
area
Buffer
memory
D
RIWT
RIRD

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MELSEC-Q
1 OVERVIEW
(4) Intelligent device station communication
Communication between the master station and the intelligent device station
uses two types of transmission methods: cyclic transmission and transient
transmission (see Section 4.2.4).
(a) Cyclic transmission
Signals for handshaking with the intelligent device station (positioning start,
positioning complete, etc.) are communicated using the remote input RX and
remote output RY. Numeric data (positioning start number, present feed
value, etc.) is communicated using remote registers RWw and RWr.
PLC CPU
X
Y
D
D
Master station
Remote
output
RY
Remote
input
RX
Remote
register
RWw
Remote
register
RWr
Remote
input
RX
Remote
output
RY
Remote
register
RWw
Remote
register
RWr
Automatic refresh
Automatic refresh
Automatic refresh
Automatic refresh
Link scan
Link scan
Link scan
Link scan
Intelligent device station Servo amplifier
(b) Transient transmission
Read (RIRD) or written (RIWT) operation of the intelligent device station
buffer memory can be performed at any timing.
Master stationPLC CPU Intelligent device station
Transient transmission
Transient
transmission
area
Transient transmission
RIWT
RIRD
Buffer memory

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MELSEC-Q
1 OVERVIEW
(5) Parameter setting by GX Developer or the dedicated instruction
There are two parameter setting methods; the parameters can either be set by
GX Developer or by using a dedicated instruction (see Sections 4.2.5 and 4.2.6).
The following table lists the differences between the two setting methods.
Program
requirement for
setting
parameters
Automatic
refresh
Number of
CPUs that can
be mounted
Changing the
parameter
settings while
the PLC CPU is
running
Parameter setting with
GX Developer Not required 4 modules
Parameter setting with
dedicated instruction Required 64 modules
(6) System down prevention (Slave station cut-off function)
Because the system employs the bus connection method, even if a module
system fails due to power off, it will not affect the communication with other
normal modules.
Also, for a module using a 2-piece terminal block, the module can be replaced
during data link. (Replace the module after turning off the module power).
However, if the cable is disconnected, data link to all stations are disabled (see
Section 4.3.1).
Master
station
Remote station
(occupying 2 stations) Remote station (occupying 1 station)
Local
station
(occupying
1 station) Remote station
(occupying 2 stations)
Local
station
(occupying
4 stations)
Station number 1 Station number 3 Station number 5
Station number 4 Station number 7
Master
station
Remote station
(occupying 2 stations) Remote station (occupying 1 station)
Local
station
(occupying
1 station) Remote station
(occupying 2 stations)
Local
station
(occupying
4 stations)
Station number 1 Station number 3 Station number 5
Station number 4 Station number 7
Data link continues
Faulty
station
(7) Automatic return function
When a station that has been disconnected from the link due to power off
recovers the normal status, it will join the data link automatically (see Section
4.3.2).