Mitsubishi A1SJ61BT11 User manual

Control & Communication Link System Master/Local Module
Type AJ61BT11/A1SJ61BT11 User,s Manual
Mitsubishi Programmable Controller

A - 1
•SAFETY PRECAUTIONS •
(Read these precautions before using.)
When using Mitsubishi equipment, thoroughly read this manual and the associated manuals introduced in
this manual.
Also pay careful attention to safety and handle the module properly. These precautions apply only to
Mitsubishi equipment. Refer to the user’s manual of the CPU module to use for a description of the PLC
system safety precautions.
These •SAFETY PRECAUTIONS •classify the safety precautions into two categories: "DANGER" and
"CAUTION".
DANGER
CAUTION
Procedures which may lead to a dangerous condition and cause death
or serious injury if not carried out properly.
Procedures which may lead to a dangerous condition and cause
superficial to medium injury, or physical damage only, if not carried out
properly.
Depending on circumstances, procedures indicated by !CAUTION may also be linked to serious
results.
In any case, it is important to follow the directions for usage.
Store this manual in a safe place so that you can take it out and read it whenever necessary. Always
forward it to the end user.
[DESIGN PRECAUTIONS]
!DANGER
•Read Chapter 5 in this manual carefully for status of each station when the PC CPU has
stopped its operation and when a communication error occurred in the data link.
Configure an interlocking circuit in a sequence program using the communication status
information (SB, SW) so that the safety of the overall system is always maintained.
Accident may occur due to output error or malfunctioning.
•An error is not detected by the master station nor local station when a station specified as an
error-invalid station is in a communication error status.
!CAUTION
•Do not bundle, on install, the control cables and communication cables with, or near, main circuit
and power cables. Keep them at least 100mm (3.9 inch) away from such cables. Noise may
cause erroneous operation.

A - 2
[INSTALLATION PRECAUTIONS]
!CAUTION
•Use the PC in the environment given in the general specifications section of this manual. Using
the PC outside the range of the general specifications may result in electric shock, fire, or
erroneous operation or may damage or degrade the product.
•Insert the tabs at the bottom of the module into the holes in the base unit before installing the
module. (Modules in AnS series, make sure screws are securely tightened to base unit with
specified torques.)
Improper installation may cause erroneous operation, accidents, or the module to fall out.
•Do not directly touch the module's conductive parts or electronic components.
Doing so could cause malfunction or trouble in the module.
[PRECAUTIONS REGARDING WIRING]
!DANGER
•Completely turn off the external power supply when installing or placing wiring. Failing to
completely shut out the power supply phases could cause electrical shock and/or damage to the
product.
•Following installation or wiring work, when turning on the power supply and operating the
equipment, make sure the terminal cover provided as an accessory has been attached to the
product.
[WIRING PRECAUTIONS]
!CAUTION
•Tighten the terminal screws by the specified torque.
Loose terminal screws may cause a short circuit or erroneous operation.
Overtightening of screws can cause damages to the screws and/or the module, resulting in
fallout, short circuits, or malfunction.
•Be sure that cuttings, wire chips, or other foreign matter do not enter the module.
Foreign matter may start a fire or cause an accident or erroneous operation.
•Be sure to fix the wires or cables by ducts or clamps when connecting them to the module.
Cables not placed in the duct or without clamping may hang or shift, allowing them to be
accidentally pulled, which may result in a malfunction or damage to the module and cable.
•Do not install the control lines together with the communication cables, or bring them close to
each other. Failure to do so may cause malfunctions due to noise.
•When detaching the communication cable or power cable from the module, do not pull the cable
portion. For cables with connectors, hold the connector at the junction to the module, then
detach it. For connectors without connectors, first loosen the screw at the junction, then detach
the cable.
Pulling the cable portion while it is connected to the module may cause a malfunction or damage
to the module and cable.

A - 3
[STARTING AND MAINTENANCE PRECAUTIONS]
!CAUTION
•Do not touch any terminal without turning off all phases of the external power supply used in the
system.
It may cause erroneous operation.
•Be sure to shut off all phases of the external power supply before cleaning or retightening the
terminal screws. Doing this work while the power is on may damage the module or cause
erroneous operation.
•Do not disassemble or rebuild the module.
It may cause accidents, erroneous operation, injury, or fire.
•Be sure to shut off all phases of the external power supply used by the system before mounting
or removing the module.
Mounting or dismounting the module whhile the power is on may damage the module or cause
erroneous operation.
•Do not mount/remove the module onto/from base unit more than 50 times
(IEC61131-2-compliant), after the first use of the product.
•Always make sure to touch the grounded metal to discharge the electricity charged in the
electricity charged in the body, etc., before touching the module.
Failure to do say cause a failure or malfunctions of the module.
[DISPOSAL PRECAUTIONS]
!CAUTION
•When disposing of this product, handle it as industrial waste.

A - 4
Revisions
The manual number is noted at the lower left of the back cover.
Print Date Manual Number Revision
Nov. 1996 IB (NA)-66721-A First printing
Jan. 1997 IB (NA)-66721-B Addition
Section 3.2.1, 4.12.3, 13.2
Correction
Chapter 1, Section 1.1, 3.2, 3.4.1, 7.3, 7.6.3, 8.3.2, 13.1, 13.5.8
Aug. 1997 IB (NA)-66721-C Addition
Section 1.1, 5.3.4, 5.4, Chapter 14, 15, 16
Correction
Section 1.4, 1.5, 2.1, 2.2.1, 2.2.3, 3.2, 3.2.1, 3.4.1, 3.4.2, 5.1, 7.1, 7.2.1,
7.3, 7.5, 7.6.1, 7.6.3, 7.6.4, 7.7.1, 7.7.2, 7.8
Jan. 1998 IB (NA)-66721-D Addition model
Section 1.4, 2.2.3
Correction
Section 1.1, 3.3, 3.4.1, 3.5.1, 3.5.2, 4.3, 4.5, 5.2, 7.6.4, 13.1, Chapter
14, 15.1, 15.2.1, 15.6, 15.6.1, 15.6.3, 15.6.4, 15.6.5, 15.6.10, 16.2.3,
App2
Mar. 2000 IB (NA)-66721-E Addition model
Section 2.2.3
Addition
Section 7.6, 15.7
Correction
SAFETY PRECAUTIONS, Section 1.1, 1.5, 3.3, 3.5.1, 5.1, 5.2, 5.4.3,
7.3, 7.5, 8.3.2, 10.2.2, 12.2.2, 13.3, Chapter 14, Section 15.1, 15.2.1,
15.5.2, 15.5.4, 15.5.5, 15.6, 15.8, Chapter 16
Jul. 2000 IB (NA)-66721-F Addition
Section 2.2.4, 3.2.2
Correction
Section 1.4, 2.2.1, 3.2, 3.2.1, 3.3, 3.4.2, 3.5.1, 7.3, 7.6.2, 7.7.4, 8.3.1,
9.1.1, 10.1.1, 10.2.2, 11.1.1, 11.1.2, 12.1.1, 12.1.4, 15.2.1, App1.1,
App1.2
Jul. 2001 IB (NA)-66721-G Addition
Section 8.2
Correction
Section 2.2.3, 3.4.1, 3.4.2, 4.12.1, 5.4, 5.4.1, 5.4.2, 5.4.3, 7.2.1, 7.3, 7.5,
8.4.2, 9.1.1, 9.2.1, 10.1.1, 10.2.1, 11.1.1, 11.1.2, 11.2.1, 12.1.1, 12.1.4,
12.2.1, 13.1, 13.3, 13.4.2, 13.4.3, Chapter 14, Section 15.1, 15.2.1, 15.6,
15.7.1

A - 5
The manual number is noted at the lower left of the back cover.
Print Date Manual Number Revision
Jul. 2002 IB (NA)-66721-H Correction
Section 2.2.3, 3.3, 3.4.2, 4.10, 8.1, 13.3, 15.6
Oct. 2002 IB (NA)-66721-I Correction
Section 3.1, 3.5.2
Oct. 2003 IB (NA)-66721-J Addition
Conformation to the EMC Directive and Low Voltage Instruction
Correction
SAFETY PRECAUTIONS, Section 3.5.1, 7.8, 7.9, 13.3
Apr. 2006 IB (NA)-66721-K Correction
SAFETY PRECAUTIONS, Conformation to the EMC Directive and Low
Voltage Instruction , Chapter 1, Section 2.2.2, 2.2.4, 3.2, 3.4.1, 3.4.2, 4.1,
4.8, 6.3, 7.5, 13.1, 13.3, 15.2.1, App2
Sep. 2007 IB (NA)-66721-L Correction
Section 1.4, 1.5, 2.1, 2.2.3, 3.5.2, 4.4, 7.3, 7.7.4, 8.4.1, App1.2
Japanese Manual Version SH-3603-L
This manual does not imply guarantee or implementation right for industrial ownership or implementation of other rights.
Mitsubishi Electric Corporation is not responsible for industrial ownership problems caused by use of the contents of this
manual.
©1996 Mitsubishi Electric Corporation

A - 6
INTRODUCTION
Thank you for choosing a Mitsubishi MELSEC-A Series General Purpose Programmable Controller.
Before using your new PC, please read this manual thoroughly to gain an understanding of its functions so you
can use it properly.
Please forward a copy of this manual to the end user.
Table of Contents
SAFETY PRECAUTIONS..............................................................................................................................A- 1
Revisions ........................................................................................................................................................A- 4
INTRODUCTION............................................................................................................................................A- 6
About This Manual .........................................................................................................................................A-12
Conformation to the EMC Directive and Low Voltage Instruction ................................................................A-12
1. Overview..........................................................................................................................................1- 1 to 1-14
1.1 How to Use This Manual......................................................................................................................... 1- 3
1.2 Characteristics......................................................................................................................................... 1- 4
1.3 Communication Overview....................................................................................................................... 1- 9
1.3.1 Communication between the master station and remote I/O station ............................................. 1- 9
1.3.2 Communication between the master station and remote device station ....................................... 1-10
1.3.3 Communication between the master station and local station ....................................................... 1-11
1.3.4 Compound system communication ................................................................................................. 1-12
1.4 Number of Occupied Stations and Station Number, Number of Unit and Number of Stations............ 1-13
1.5 Abbreviations and Special Terms........................................................................................................... 1-14
2. System Configuration......................................................................................................................2- 1 to 2- 8
2.1 Total Configuration.................................................................................................................................. 2- 1
2.2 Applicable System .................................................................................................................................. 2- 2
2.2.1 Applicable CPU and number of cards that can be installed ........................................................... 2- 2
2.2.2 Precautions when configuring a system.......................................................................................... 2- 3
2.2.3 List of system equipment restricted by master/local module versions ........................................... 2- 6
2.2.4 About Ver. 1.10................................................................................................................................. 2- 7
3. Specification ....................................................................................................................................3- 1 to 3-36
3.1 General Specification.............................................................................................................................. 3- 1
3.2 Performance Specifications .................................................................................................................... 3- 2
3.2.1 Maximum overall cable distance (for Ver. 1.00).............................................................................. 3- 3
3.2.2 Maximum overall cable distance (for Ver. 1.10).............................................................................. 3- 5
3.3 CC-Link Dedicated Cable ....................................................................................................................... 3- 6
3.4 I/O Signals to the PC CPU...................................................................................................................... 3- 7
3.4.1 I/O signal list ..................................................................................................................................... 3- 7
3.4.2 I/O signal details ............................................................................................................................... 3- 9
3.5 Buffer Memory......................................................................................................................................... 3-18
3.5.1 Buffer memory list ............................................................................................................................ 3-18
3.5.2 Buffer memory details ...................................................................................................................... 3-20

A - 7
4. Functions .........................................................................................................................................4- 1 to 4-30
4.1 Function List ............................................................................................................................................ 4- 1
4.2 Communication Between the Master Station and Remote I/O Station ................................................. 4- 2
4.3 Communication Between the Master Station and Remote Device Station........................................... 4- 4
4.4 Communication Between the Master Station and Local Station ........................................................... 4-10
4.5 Communication in Compound Systems................................................................................................. 4-16
4.6 Reserved Station Function ..................................................................................................................... 4-22
4.7 Error Invalid Station Function ................................................................................................................. 4-23
4.8 Data Link Status Setting when the Master Station PC CPU has an Error ............................................ 4-24
4.9 Setting the Status of Input Data from a Data Link Faulty Station.......................................................... 4-25
4.10 Module Reset Function from a Sequence Program ............................................................................ 4-26
4.11 Data Link Stop/Restart.......................................................................................................................... 4-27
4.12 RAS Function ........................................................................................................................................ 4-28
4.12.1 Automatic return function ............................................................................................................... 4-28
4.12.2 Slave station cut-off function.......................................................................................................... 4-29
4.12.3 Station number overlap checking function .................................................................................... 4-30
5. Data Link Processing Time .............................................................................................................5- 1 to 5-24
5.1 Status of Each Station when an Error has Occurred............................................................................. 5- 1
5.2 Link Scan Time ....................................................................................................................................... 5- 4
5.3 Transmission Delay Time ....................................................................................................................... 5- 5
5.3.1 Master station remote I/O station................................................................................................ 5- 5
5.3.2 Master station remote device station .......................................................................................... 5- 7
5.3.3 Master station local station.......................................................................................................... 5-11
5.3.4 Master station intelligent device station ...................................................................................... 5-15
5.4 Dedicated Instruction Processing Time.................................................................................................. 5-16
5.4.1 Master station local station ......................................................................................................... 5-16
5.4.2 Local station local station............................................................................................................ 5-20
5.4.3 Master station intelligent device station ..................................................................................... 5-22
6. Parameter Setting ...........................................................................................................................6- 1 to 6-10
6.1 Procedure from Parameter Setting to Data Link Startup....................................................................... 6- 1
6.1.1 Relationship between buffer memory, E2PROM and internal memory.......................................... 6- 1
6.1.2 Procedure from parameter setting to data link start........................................................................ 6- 3
6.2 Parameter Settings ................................................................................................................................. 6- 4
6.3 Setting from a Sequence Program ......................................................................................................... 6- 5

A - 8
7. Data Link Procedure........................................................................................................................7- 1 to 7-22
7.1 Data Link Procedure ............................................................................................................................... 7- 1
7.2 Installation and Setting............................................................................................................................ 7- 2
7.2.1 Precautions when handling the module .......................................................................................... 7- 2
7.2.2 Setting environment ......................................................................................................................... 7- 2
7.3 Name of Each Part and Settings ............................................................................................................ 7- 3
7.4 Checking Module Condition (Hardware Test)........................................................................................ 7- 7
7.5 Module Wiring with CC-Link Dedicated Cable ....................................................................................... 7- 9
7.6 T-Branch Connection with the CC-Link Dedicated Cable ..................................................................... 7-10
7.6.1 T-Branch system configuration ........................................................................................................ 7-10
7.6.2 T-Branch communication specifications list .................................................................................... 7-10
7.7 Switch Settings........................................................................................................................................ 7-12
7.7.1 Station number setting (master station, local station and remote station) ..................................... 7-12
7.7.2 Mode setting ..................................................................................................................................... 7-14
7.7.3 Transmission speed setting ............................................................................................................. 7-14
7.7.4 Condition setting............................................................................................................................... 7-15
7.8 Checking the Connection Condition (Line Test) .................................................................................... 7-16
7.8.1 Checking connection and communication status with remote station/local station
(Line Test 1)...................................................................................................................................... 7-16
7.8.2 Checking connection and communication status with specific remote
station/local station (Line Test 2) ..................................................................................................... 7-18
7.9 Checking Parameters (Parameter Confirmation Test) ..........................................................................7-20
8. Programming ...................................................................................................................................8- 1 to 8-22
8.1 Precautions when Programming ............................................................................................................ 8- 1
8.2 Precautions for Registering Parameters to E2PROM............................................................................. 8- 3
8.2.1 Target module and versions ............................................................................................................ 8- 3
8.2.2 Precautions....................................................................................................................................... 8- 3
8.2.3 Program for registering parameters to E2PROM ............................................................................ 8- 4
8.3 Programming Procedure........................................................................................................................ 8- 6
8.3.1 Communication between the master station and remote I/O station ............................................. 8- 6
8.3.2 Communication between the master station and remote device station ....................................... 8- 7
8.3.3 Communication between the master station and local station ....................................................... 8- 8
8.3.4 Communication in a compound system .......................................................................................... 8-10
8.4 Link Special Relay/Register (SB/SW) .................................................................................................... 8-12
8.4.1 Link special relay (SB) ..................................................................................................................... 8-12
8.4.2 Link special register (SW) ................................................................................................................ 8-16
9. Communication Between the Master Station and the Remote I/O Station ...................................9- 1 to 9-12
9.1 System Configuration.............................................................................................................................. 9- 1
9.1.1 Setting of the master station ............................................................................................................ 9- 2
9.1.2 Setting of the remote I/O station ...................................................................................................... 9- 3
9.2 Creating a Program................................................................................................................................. 9- 4
9.2.1 Program for parameters ................................................................................................................... 9- 4
9.2.2 Communication program.................................................................................................................. 9- 7

A - 9
9.3 Performing the Data Link ........................................................................................................................ 9-10
9.3.1 Confirming the operation by LED display........................................................................................ 9-10
9.3.2 Confirming the operation by the program........................................................................................ 9-11
10. Communication Between the Master Station and the Remote Device Station...................... 10- 1 to 10-14
10.1 System Configuration.......................................................................................................................... 10- 1
10.1.1 Setting of the master station ........................................................................................................ 10- 2
10.1.2 Setting of the remote device station ............................................................................................ 10- 3
10.2 Creating a Program............................................................................................................................. 10- 4
10.2.1 Program for parameters............................................................................................................... 10- 4
10.2.2 Communication program ............................................................................................................. 10- 7
10.3 Performing the Data Link .................................................................................................................... 10-12
10.3.1 Confirming the operation by LED display.................................................................................... 10-12
10.3.2 Confirming the operation by the program.................................................................................... 10-13
11. Communication Between the Master Station and the Local Station ...................................... 11- 1 to 11-14
11.1 System Configuration.......................................................................................................................... 11- 1
11.1.1 Setting of the master station ........................................................................................................ 11- 2
11.1.2 Setting of the local station............................................................................................................ 11- 3
11.2 Creating a Program............................................................................................................................. 11- 4
11.2.1 Program for the mater station ...................................................................................................... 11- 4
11.2.2 Local station program .................................................................................................................. 11-10
11.3 Performing the Data Link .................................................................................................................... 11-12
11.3.1 Confirming the operation by LED display.................................................................................... 11-12
11.3.2 Confirming the operation by the program.................................................................................... 11-13
12. Communication in the Compound System.............................................................................. 12- 1 to 12-16
12.1 System Configuration.......................................................................................................................... 12- 1
12.1.1 Setting of the master station ........................................................................................................ 12- 2
12.1.2 Setting of the remote I/O station .................................................................................................. 12- 3
12.1.3 Setting of the remote device station ............................................................................................ 12- 3
12.1.4 Setting of the local station............................................................................................................ 12- 4
12.2 Creating a Program............................................................................................................................. 12- 5
12.2.1 Program for the master station .................................................................................................... 12- 5
12.2.2 Local station program .................................................................................................................. 12-13
12.3 Performing the Data Link .................................................................................................................... 12-14
12.3.1 Confirming the operation by LED display.................................................................................... 12-14
12.3.2 Confirming the operation by the program.................................................................................... 12-16

A - 10
13. Troubleshooting........................................................................................................................ 13- 1 to 13-18
13.1 Verification when a Trouble Occurs ................................................................................................... 13- 1
13.2 Troubleshooting when the "ERR" LED on the Master Station is Flashing........................................ 13- 4
13.3 Error Codes ......................................................................................................................................... 13- 6
13.4 LED Display Status ............................................................................................................................. 13-12
13.4.1 When data link is normal.............................................................................................................. 13-12
13.4.2 When a cable is disconnected ..................................................................................................... 13-12
13.4.3 When a cable is shorted .............................................................................................................. 13-13
13.4.4 When the link is stopped at the master station ........................................................................... 13-13
13.4.5 When power supply to a remote I/O station is turned off............................................................ 13-14
13.4.6 When the power supply to a remote device station is turned off................................................ 13-14
13.4.7 When the power supply to the local station (PC CPU) is turned off........................................... 13-15
13.4.8 When the station numbers are duplicate..................................................................................... 13-15
13.4.9 When the transmission speed is set incorrectly.......................................................................... 13-16
13.4.10 When the switch setting is changed during data link ................................................................ 13-16
13.4.11 When data link is started with the switch set outside the range............................................... 13-17
13.4.12 When the remote I/O station is not set by the parameter (i.e., is set as reserved).................. 13-17
13.4.13 When the remote device station is not set by the parameter (i.e., is set as reserved)............ 13-18
13.4.14 When the local station is not set by the parameter (i.e., is set as reserved) ...........................13-18
14. Overview (Function Version B or Later) .................................................................................. 14- 1 to 14- 2
15. Functions (Function Version B or Later).................................................................................. 15- 1 to 15-16
15.1 List of Functions .................................................................................................................................. 15- 1
15.2 Parameter Registration Function........................................................................................................ 15- 1
15.2.1 Network parameters..................................................................................................................... 15- 1
15.2.2 Automatic refresh parameters ..................................................................................................... 15- 3
15.3 Automatic Refresh Function ............................................................................................................... 15- 3
15.4 Scan Synchronous Function............................................................................................................... 15- 4
15.4.1 Synchronous mode ...................................................................................................................... 15- 4
15.4.2 Asynchronous mode .................................................................................................................... 15- 5
15.5 Standby Master Function.................................................................................................................... 15- 6
15.5.1 Operation overview ...................................................................................................................... 15- 6
15.5.2 Settings on using the standby master function ........................................................................... 15- 7
15.5.3 Special link relays/resisters (SB,SW) relating to the standby master function .......................... 15- 8
15.5.4 Notes on using the standby master function............................................................................... 15- 9
15.5.5 Program example on using the standby master function ........................................................... 15-10
15.6 Dedicated Instructions ........................................................................................................................ 15-11
15.7 Remote I/O Net Mode......................................................................................................................... 15-12
15.7.1 Features........................................................................................................................................ 15-12
15.7.2 Software version corresponding to master module and its CPU................................................ 15-12
15.7.3 Set items....................................................................................................................................... 15-12
15.7.4 Link scan time .............................................................................................................................. 15-13
15.7.5 Precaution .................................................................................................................................... 15-13

A - 11
15.8 Temporary Error Invalid Station Specification Function .................................................................... 15-14
15.8.1 I/O status of the temporary error invalid station specification..................................................... 15-14
15.8.2 Special link relay/registers (SB,SW) relating to the temporary error invalid station
specification function.................................................................................................................... 15-14
15.8.3 Execution procedure for the temporary error invalid station specification function ................... 15-16
16. Communication with the Intelligent Device (Function Version B or Later) ............................. 16- 1 to 16- 2
Appendix ......................................................................................................................................App- 1 to App- 5
Appendix 1 External Dimensions Diagram...............................................................................................App- 1
1.1 AJ61BT11 ........................................................................................................................................App- 1
1.2 A1SJ61BT11 ...................................................................................................................................App- 2
Appendix 2 Parameter Setting Sheet .......................................................................................................App- 3

A - 12
About This Manual
The following are manuals related to this product.
Request for the manuals as needed according to the chart below.
Related Manuals
Manual Name Manual No.
(Type code)
AnSHCPU/AnACPU/AnUCPU Programming Manual (Dedicated instructions)
Describes the commands that were extended for AnSHCPU/AnACPU/AnUCPU.
(Sold separately)
IB-66251
(13J742)
Conformation to the EMC Directive and Low Voltage Instruction
When incorporating the Mitsubishi PLC into other machinery or equipment and
ensuring compliance with the EMC and low voltage directives, refer to Chapter 3,
"EMC and Low Voltage Directives" of the User's Manual (Hardware) included with the
CPU module or base unit used.
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 and Low Voltage Directives, refer to the Section of
"CC-Link Modules" in Chapter 3 "EMC and Low Voltage Directives" of the User's
Manual (Hardware) included with the CPU module or base unit used.

1 - 1
MELSEC-
A
1 OVERVIEW
1
1. Overview
The overview of the Control & Communication Link system (abbreviated as CC-Link
from here on) is described in this chapter.
CC-Link is...
1By distributing each module to the equipment device such as the conveyor line and
machine devices, the wiring conservation of the entire system can be accomplished.
2Simple, high-speed communication can be accomplished with modules that handle
on/off data such as I/O or numeric data.
3By connecting multiple PC CPUs, a simple distributed system can be configured.
4Connections can be made to different types of devices made by partner
manufacturers, giving flexibility to the system.
CC - Link system
Partner manufacturer's
product
Remote I/O station
Remote I/O station
Remote device station
PC CPU
Local station
PC CPU
Master station
Master station...................Station which controls the remote I/O station, remote device
station, and local stations
Remote I/O station ........... Remote station which handles only on/off data
Remote device station .....Remote station which handles both on/off data and numeric
data
Local station .....................Station which has a CPU and can communicate with the
master station and other local stations

1 - 2
MELSEC-
A
1 OVERVIEW
When applying the following program examples to the actual system, make sure to
examine the applicability and confirm that it will not cause system control problems.
After unpacking, please check to make sure the following components have been
included.
Product name Quantity
AJ61BT11 main unit 1
AJ61BT11 CC-Link System Master·Local
Module User's Manual (Hardware) 1
Terminating resistance 110 Ω, 1/2 W
(All brown) 2
AJ61BT11 Control & Communication Link
System Master·Local Module
Terminating resistance 130 Ω, 1/2 W
(Brown, orange, brown) 2
A1SJ61BT11 main unit 1
A1SJ61BT11 CC-Link System
Master·Local Module User's Manual
(Hardware)
1
Terminating resistance 110 Ω, 1/2 W
(All brown) 2
A1SJ61BT11 Control & Communication
Link System Master·Local Module
Terminating resistance 130 Ω, 1/2 W
(Brown, orange, brown) 2

1 - 3
MELSEC-
A
1 OVERVIEW
1.1 How to Use This Manual
The master·local module has the following functions added from the function version B
or later. The detailed descriptions of the additional functions are provided in Chapter 14
or later.
(1) Scan synchronous function
Link scan can be executed synchronized with the sequence scan.
(2) Standby master function
With this function, the data link can be continuously executed even if an error
occurs in the master station, by automatically switching to the standby master
station.
(3) Dedicated instructions
Transient transmission with the intelligent device and local station is possible.
In addition, read/write of data with handshake to/from the remote device is
feasible.
(4) Temporary error invalid station specification function
By specifying the corresponding remote station as a temporary error invalid
station, an error is not detected even if the module is replaced while in
communication.
(5) Parameter registration function
Parameters such as total number of connected stations and station information
can be set using dedicated instructions.
(6) Automatic refresh function
Data transferred by cyclic transmissions, such as RX and RY, can be refreshed
by the END processing to a desired device, when set up with the dedicated
instruction.
(7) Dedicated instruction (software version J or later)
Reading and writing of device with respect to the CPU of the specified station are
possible.
(8) Remote I/O net mode (applicable to software version P or later)
When the system is configured only with the master station and remote I/O
stations, if the remote I/O net mode is used, the setting of the network
parameters will be unnecessary and the link scanning time will be shortened.

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1.2 Characteristics
The characteristics of the CC-Link are described below:
(1) Remote I/O station communication
The communication is performed with only on/off data (remote input RX and
remote output RY).
Remote input
(RX)
Master station
Remote output
(RY)
Link scan
Link scan
Input
Output
Remote I/O station
(2) Remote device station communication
The communication is performed with on/off data (remote input RX and remote
output RY) and numeric data (remote register).
Analog voltage
Digital output value
TO
FROM
A/D conversion
completion flag
Offset•gain selection
A
/D conversion
enable/disable specification
Master station
Remote input
(RX)
Remote output
(RY)
Remote register
(RWw)
Remote register
(RWr)
Link scan
Link scan
Link scan
Link scan
Remote device station
Remote input
(RX)
Remote output
(RY)
Remote register
(RWw)
Remote register
(RWr)

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(3) Local station communication
The data communication between PC CPUs can be performed in N:N
relationship with bit data (remote input RX and remote output RY) and word data
(remote register)
Remote output (RY)Remote output (RY)
Remote output (RY) Remote input (RX)
Master station
Remote input (RX)
Remote input (RX)
Remote register (RWw)
Remote register (RWw) Remote register (RWw)
Remote register (RWr)Remote register (RWr)
Remote register (RWr)
Link scan
Link scan
Link scan
Link scan
Link scan
Link scan
Link scan
Link scan
Local station Local station
(4) Establishing high-speed transmission
When the transmission speed of 10Mbps is set, the link scan time
(communication time with the master station and remote station/local station) is
still at high speed, even when the maximum 64 stations are connected.
Remote I/O (RX, RY) 2048 points ..................................................... 4 ms
Remote I/O (RX, RY) 2048 points
+ remote register (RWw, RWr) 512 points ................ 7 ms
(5) System configurations are possible, according to requirements.
(a) Transmission distance
The total extended distance depends on the transmission speed, but
connections can be made between 100 m (at 10 Mbps) and 1.2 km (at 156
kbps).
(b) Number of connected stations
A maximum of 64 stations, including remote I/O stations, remote device
stations, and local stations can be connected to one master station.
Up to 64 remote I/O stations, 42 remote device stations, and 26 local
stations can be connected. (Refer to Section 2.1.)

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(6) Link points
2048 points of remote input (RX), 2048 points of remote output (RY), and 512
points of remote register (RW) can be used for communication in one system.
For one remote station or local station, 32 points of remote input (RX), 32 points
of remote output (RY), and 8 points of remote register (RW) (RWw: 4 points,
RWr: 4 points) can be handled.
(7) System down prevention (Station cutoff function)
Because the system employs the bus method, even if there is a remote station or
local station which goes down due to power off, etc., it won't affect the
communication with other functioning remote/local stations.
Also, for the module using with the 2-piece terminal block, the module can be
replaced during data link.
Master
station
Master
station
Station No.1
Station No.1
Station No.3
Station No.3
Remote station
(occupies 2 stations)
Remote station
(occupies 1 station)
Remote station
(occupies 2 stations)
Remote station
(occupies 1 station)
Station No.4 Station No.7
Station No.5
Local station
(occupies 1
station)
Remote station
(occupies 2 stations)
Local station
(occupies 4
stations)
Station No.4 Station No.7
Station No.5
Local station
(occupies 1
station)
Remote station
(occupies 2 stations)
Local station
(occupies 4
stations)
Data link continues
Faulty
station