Mitsubishi FX2N-16CCL-M User manual

MELSEC FX Series
Programmable Logic Controllers
User's Manual
(Hardware)
FX2N-16CCL-M
CC-Link Master Module
INDUSTRIAL AUTOMATION
MITSUBISHI ELECTRIC
MITSUBISHI ELECTRIC
Art. no.: 168595
15 03 2007
JY992D93101
Version D
Industrial automation
Elincom Group
EuropeanUnion: www.elinco.eu
Russia: www.elinc.ru

Foreword
• This manual contains text, diagrams and explanations which will guide the reader in the
correct installation and operation of the FX2N-16CCL-M CC-Link System Master Block. It
should be read and understood before attempting to install or use the unit.
• Further information can be found in the FX1N, FX2N, FX2NC Series Hardware Manual, FX
Series Programming Manual ΙΙ.
• If in doubt at any stage of the installation of FX2N-16CCL-M CC-Link System Master Block
always consult a professional electrical engineer who is qualified and trained to the local
and national standards that applies to the installation site.
• If in doubt about the operation or use of FX2N-16CCL-M CC-Link System Master Block
please consult the nearest Mitsubishi Electric distributor.
• This manual is subject to change without notice.
FX2N-16CCL-M CC-Link System Master Block

i
FX2N-16CCL-M
Control & Communication-Link
System Master Block
USER’S MANUAL
Manual number : JY992D93101
Manual revision : D
Date : March 2007
FX2N-16CCL-M CC-Link System Master Block

FX2N-16CCL-M CC-Link System Master Block
ii

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FX2N-16CCL-M CC-Link System Master Block
iii

FX2N-16CCL-M CC-Link System Master Block
iv

FX2N-16CCL-M CC-Link System Master Block
v
Guidelines for the Safety of the User and Protection of the FX2N-16CCL-M CC-
Link System Master Block
This manual provides information for the use of the FX2N-16CCL-M CC-Link System Master
Block. The manual has been written to be used by trained and competent personnel. The
definition of such a person or persons is as follows;
a) Any engineer who is responsible for the planning, design and construction of automatic
equipment using the product associated with this manual should be of a competent
nature, trained and qualified to the local and national standards required to fulfill that
role. These engineers should be fully aware of all aspects of safety with regards to
automated equipment.
b) Any commissioning or service engineer must be of a competent nature, trained and
qualified to the local and national standards required to fulfill that job. These engineers
should also be trained in the use and maintenance of the completed product. This
includes being completely familiar with all associated documentation for the said product.
All maintenance should be carried out in accordance with established safety practices.
c) All operators of the completed equipment (see Note) should be trained to use this
product in a safe manner in compliance to established safety practices. The operators
should also be familiar with documentation which is associated with the operation of the
completed equipment.
Note : Note: the term ‘completed equipment’ refers to a third party constructed device which
contains or uses the product associated with this manual.
Notes on the Symbols Used in this Manual
At various times throughout this manual certain symbols will be used to highlight points of
information which are intended to ensure the users personal safety and protect the integrity of
equipment. Whenever any of the following symbols are encountered its associated note must
be read and understood. Each of the symbols used will now be listed with a brief description of
its meaning.
Hardware Warnings
1) Indicates that the identified danger WILL cause physical and property damage.
2) Indicates that the identified danger could POSSIBLY cause physical and property
damage.
3) Indicates a point of further interest or further explanation.
Software Warnings
4) Indicates special care must be taken when using this element of software.
5) Indicates a special point which the user of the associate software element should
be aware of.
6) Indicates a point of interest or further explanation.

FX2N-16CCL-M CC-Link System Master Block
vi
• Under no circumstances will Mitsubishi Electric be liable responsible for any consequential
damage that may arise as a result of the installation or use of this equipment.
• All examples and diagrams shown in this manual are intended only as an aid to
understanding the text, not to guarantee operation. Mitsubishi Electric will accept no
responsibility for actual use of the product based on these illustrative examples.
• Please contact a Mitsubishi Electric distributor for more information concerning applications
in life critical situations or high reliability.

FX2N-16CCL-M CC-Link System Master Block
vii
Contents
1. Introduction............................................................................................1-1
1.1 Associated Manuals ............................................................................................1-1
1.2 General Names and Abbreviations......................................................................1-2
2. Overview ...............................................................................................2-1
2.1 Overview of CC-Link System...............................................................................2-1
2.2 Overview of CC-Link Master Block FX2N-16CCL-M............................................2-1
2.3 Characteristics.....................................................................................................2-2
2.4 Major Differences from A/QnA/Q Series..............................................................2-6
3. System Configuration............................................................................3-1
3.1 Total Configuration ..............................................................................................3-1
3.2 Applicable PLC....................................................................................................3-2
3.3 Configuration Example ........................................................................................3-3
3.3.1 Example of maximum configuration, when using a FX2N PLC..................................3-3
3.3.2 Scan time of PLC and connection of two or more master blocks..............................3-4
3.3.3 Example of connection of two or more FX Series PLCs............................................3-5
3.3.4 Example of connection to the CC-Link system for the A/QnA/Q Series....................3-6
3.4 Number of Occupied Stations and Station numbers as well as Number
of Modules and Number of Stations....................................................................3-7
3.5 System Equipment List........................................................................................3-8
3.6 Precautions When Configuring the System.......................................................3-11
3.6.1 Wiring of power supply............................................................................................3-11
3.6.2 Wiring of remote I/O modules..................................................................................3-12
4. Specification..........................................................................................4-1
4.1 External Dimensions / Part Names......................................................................4-1
4.2 Power Supply Specifications...............................................................................4-1
4.3 General Specification ..........................................................................................4-1
4.4 Performance Specification...................................................................................4-2
4.4.1 Maximum transmission distance ...............................................................................4-4
4.5 Dedicated CC-Link Cable....................................................................................4-5
4.6 Buffer Memory.....................................................................................................4-6
4.6.1 Buffer memory list .....................................................................................................4-7
4.6.2 Parameter information area.......................................................................................4-8
4.6.3 I/O signals to PLC ...................................................................................................4-12
4.6.4 I/O signal details......................................................................................................4-15
4.6.5 Master block control signals....................................................................................4-22
4.6.6 Remote input (RX)...................................................................................................4-23
4.6.7 Remote output (RY) ................................................................................................4-25
4.6.8 Remote register (RWw) Master station --> Remote device station .....................4-27
4.6.9 Remote register (RWr) Master station <-- Remote device station.......................4-29
4.6.10 Link special relay (SB) and link special register (SW).............................................4-31

FX2N-16CCL-M CC-Link System Master Block
viii
Contents
5. Functions...............................................................................................5-1
5.1 Function List ........................................................................................................5-1
5.2 Communication between Master Station and Remote I/O Stations.....................5-2
5.3 Communication between Master Station and Remote Device Stations ..............5-4
5.4 Communication in Compound System ................................................................5-9
5.5 Reserved Station Function ................................................................................5-14
5.6 Error Invalid Station Function ............................................................................5-15
5.7 Data Link Status Setting against Error in Master Station PLC ..........................5-16
5.8 Setting of Input Data Status from Data Link Faulty Station ...............................5-17
5.9 Module Reset Function from Sequence Program .............................................5-18
5.10 Data Link Stop/Restart ......................................................................................5-19
5.11 RAS Function ....................................................................................................5-20
5.11.1 Automatic return function ........................................................................................5-20
5.11.2 Slave station cutoff function ....................................................................................5-20
5.11.3 Station number overlap check function ...................................................................5-21
5.12 Temporary Error Invalid Station Specification Function.....................................5-22
5.12.1 I/O status when temporary error invalid stations are specified................................5-22
5.12.2 Link special relays and registers (SB and SW) related to temporary error
invalid station specification function ........................................................................5-22
5.12.3 Temporary error invalid station specification procedure..........................................5-24
6. Data Link Processing Time ...................................................................6-1
6.1 Status of Each Station when an Error has Occurred...........................................6-1
6.2 Link Scan Time....................................................................................................6-3
6.3 Transmission Delay Time....................................................................................6-4
6.3.1 Master station ↔remote I/O station..........................................................................6-4
6.3.2 Master station ↔remote device station....................................................................6-5
7. Parameter Setting .................................................................................7-1
7.1 Procedure from Parameter Setting to Data Link Startup.....................................7-1
7.1.1 Relationship among buffer memory, EEPROM and internal memory.......................7-1
7.1.2 Procedure from parameter setting to data link startup ..............................................7-3
7.2 Parameter Setting Items......................................................................................7-4
7.3 Setting from Sequence Program .........................................................................7-5
7.3.1 Setting and operation using the buffer memory ........................................................7-5
7.3.2 Parameter registration procedure to the EEPROM and operation based on
parameters registered in the EEPROM.....................................................................7-7
7.3.3 Program example....................................................................................................7-10

FX2N-16CCL-M CC-Link System Master Block
ix
Contents
8. Data Link Procedure..............................................................................8-1
8.1 Data Link Procedure............................................................................................8-3
8.2 Name of Each Part and Settings .........................................................................8-4
8.3 Master Block Status Check (Hardware Test).......................................................8-8
8.4 Module Wiring with Dedicated CC-Link Cables...................................................8-9
8.5 T-shaped Branch Connection Using Dedicated CC-Link Cables......................8-10
8.5.1 System configuration with T-shaped branch connection.........................................8-10
8.5.2 T-shaped branch communication specification list..................................................8-11
8.6 Switch Settings..................................................................................................8-12
8.6.1 Station number setting (master station, remote I/O stations and remote
device stations) ......................................................................................................8-12
8.6.2 Mode setting............................................................................................................8-14
8.6.3 Transmission speed setting.....................................................................................8-14
8.6.4 Condition setting......................................................................................................8-14
8.7 Connection Status Check (Line Test)................................................................8-15
8.7.1 Check of connection status and communication status with remote stations
(line test 1)..............................................................................................................8-15
8.7.2 Check of communication status with specific remote station (line test 2)................8-16
8.8 Parameter Check (Parameter Verification Test)................................................8-17
9. Programming.........................................................................................9-1
9.1 Precautions in Programming ...............................................................................9-1
9.2 Programming Procedure .....................................................................................9-3
9.2.1 Communication between master station and remote I/O stations.............................9-3
9.2.2 Communication between master station and remote device stations .......................9-4
9.2.3 Communication in compound system .......................................................................9-5
9.3 Link Special Relay/Register (SB/SW)..................................................................9-6
9.3.1 Link special relay (SB) list .........................................................................................9-6
9.3.2 Link special register (SW) .......................................................................................9-10
10.Communication between Master Station and Remote I/O Stations ...10-1
10.1 System Configuration ........................................................................................10-1
10.1.1 Setting of master station..........................................................................................10-1
10.1.2 Setting of remote I/O station....................................................................................10-2
10.2 Creating a Program ...........................................................................................10-3
10.2.1 Program for parameters ..........................................................................................10-3
10.2.2 Program for communication ....................................................................................10-5
10.3 Execution of Data Link.......................................................................................10-7
10.3.1 Confirmation of operation by LED indication...........................................................10-7
10.3.2 Confirmation of operation by program.....................................................................10-8
11.Communication between Master Station and Remote Device Stations..11-1
11.1 System Configuration ........................................................................................11-1
11.1.1 Setting of master station..........................................................................................11-1
11.1.2 Setting of remote device station..............................................................................11-2
11.2 Creating a Program ...........................................................................................11-3
11.2.1 Program for parameters ..........................................................................................11-3
11.2.2 Program for communication ....................................................................................11-5
11.3 Execution of Data Link.......................................................................................11-9
11.3.1 Confirmation of operation by LED indication...........................................................11-9
11.3.2 Confirmation of operation by program...................................................................11-10

FX2N-16CCL-M CC-Link System Master Block
x
Contents
12.Communication in Compound System...............................................12-1
12.1 System configuration.........................................................................................12-1
12.1.1 Setting of master station..........................................................................................12-1
12.1.2 Setting of remote I/O station....................................................................................12-2
12.1.3 Setting of remote device station..............................................................................12-2
12.2 Creating a Program ...........................................................................................12-3
12.2.1 Program for parameters ..........................................................................................12-3
12.2.2 Program for communication ....................................................................................12-5
12.3 Execution of Data Link.......................................................................................12-8
12.3.1 Confirmation of operation by LED indication...........................................................12-8
12.3.2 Confirmation of operation by program.....................................................................12-9
13.Troubleshooting..................................................................................13-1
13.1 Verification when Trouble Occurs......................................................................13-2
13.2 Troubleshooting when ERR LED is Flashing in Master Station.........................13-5
13.3 Error Codes .......................................................................................................13-7
13.4 LED Indication Status......................................................................................13-11
13.4.1 When data link is normal.......................................................................................13-11
13.4.2 When a cable is broken.........................................................................................13-11
13.4.3 When a cable is short-circuited .............................................................................13-12
13.4.4 When link is stopped in the master station............................................................13-12
13.4.5 When power supply to a remote I/O station is turned off ......................................13-13
13.4.6 When power supply to a remote device station is turned off.................................13-13
13.4.7 When a station number overlaps...........................................................................13-14
13.4.8 When the transmission speed is incorrectly set ....................................................13-14
13.4.9 When the switch setting is changed during data link.............................................13-15
13.4.10When data link is started with a switch set outside the allowable range ..............13-15
13.4.11When a remote I/O station is not set in the parameter
(and set as a reserved station)..............................................................................13-16
13.4.12When a remote device station is not set in the parameter
(and set as a reserved station)..............................................................................13-16
14.Appendix ............................................................................................14-1

Introduction 1
1-1
1. Introduction
1.1 Associated Manuals
★: Indispensable manual
✩: Manual required depending on equipment used
Table 1.1:
Manual name Manual number Description
★FX2N-16CCL-M
User’s Guide JY992D93201
(packed with product) Describes the name of each part and handling of the CC-Link master block FX2N-16CCL-M.
★FX1S/FX1N/FX2N/FX2NC
Programming Manual ΙΙ JY992D88101
(separate volume) Explains the instructions in the FX1S/FX1N/FX2N/
FX2NC Series PLC.
★FX3U/FX3UC
Programming Manual
-Basic & Applied
Instruction Edition
JY997D16601
(separate volume) Explains the instructions in the FX3U/FX3UC Series PLC.
✩FX1N Hardware Manual JY992D89301
(packed with product)
Describes the contents related to the hardware
such as specification, wiring and mounting of the
FX1N Series PLC.
✩FX2N Hardware Manual JY992D66301
(packed with product)
Describes the contents related to the hardware
such as specification, wiring and mounting of the
FX2N Series PLC.
✩FX3U Hardware Manual JY997D18801
(packed with product) Describes the name of each part and handling of the FX3U Series PLC.
✩FX3U Series User’s
Manual
- Hardware Edition
JY997D16501
(separate volume)
Describes the contents related to the hardware
such as specification, wiring and mounting of the
FX3U Series PLC.
✩FX2NC Hardware Manual JY992D76401
(packed with product)
Describes the contents related to the hardware
such as specification, wiring and mounting of the
FX2NC Series PLC.
✩FX2N-32CCL
User’s Manual JY992D71801
(packed with product) Describes programming and handling of the CC- Link interface block FX2N-32CCL.
FX2N-16CCL-M CC-Link System Master Block

FX2N-16CCL-M CC-Link System Master Block Introduction 1
1-2
1.2 General Names and Abbreviations
Unless otherwise specified, this manual uses the general names and abbreviations shown in
the table below to describe the CC-Link system master block FX2N-16CCL-M.
Table 1.2:
General name/
abbreviation Description
FX2N-16CCL-M Abbreviation of the CC-Link system master block FX2N-16CCL-M.
Cyclic transmission Transmission method to periodically communicate the contents of remote
I/Os and remote registers.
Master station Station which controls the data link system.
One master station is required in one system.
Local station Station equipped with CPU which can communicate with the master station and other local stations in the CC-Link system of the MELSEC-A/QnA/Q
Series.
Remote I/O station Remote station which deals with bit information only (to execute I/Os with
external equipment) (such as AJ65BTB1-16D and AJ65SBTB1-16D).
Remote device station Remote station which deals with bit information and word information (to execute I/Os with external equipment and exchange analog data)
(such as FX2N-32CCL, AJ65BT-64AD, AJ65BT-64DAV and AJ65BT-64DAI).
Remote station General name for remote I/O station and remote device station.
Controlled by the master station.
Intelligent device station Station which can execute transient transmission (such as AJ65BT-R2) in the
CC-Link system of the MELSEC-A/QnA/Q Series.
Standby master station Station for backup which takes over data link control when the master station is disconnected due to abnormality in the PLC CPU, the power supply, etc. in
the CC-Link system of the MELSEC-A/QnA/Q Series.
Master block Abbreviation for FX2N-16CCL-M.
SB
Link special relay (for CC-Link).
1-bit information which indicates the operation status and the data link status
of the master/local station.
Represented in "SB" for convenience.
SW
Link special register (for CC-Link).
16-bit information which indicates the operation status and the data link
status of the master/local station.
Represented in "SW" for convenience.
RX Remote input (for CC-Link) 1-bit information input from a remote station to the master station.
Represented in "RX" for convenience.
RY Remote output (for CC-Link) 1-bit information output from the master station to a remote station.
Represented in "RY" for convenience.
RWw Remote register (write area for CC-Link) 16-bit information output from the master station to a remote device station.
Represented in "RWw" for convenience.
RWr Remote register (read area for CC-Link) 16-bit information input from a remote device station to the master station.
Represented in "RWr" for convenience.

Overview 2
2-1
2. Overview
This chapter describes the overview of the CC-Link system master block FX2N-16CCL-M for
the FX Series PLC.
The abbreviated term "CC-Link" stands for "Control & Communication-Link". "CC-Link" is used
hereafter in this manual.
2.1 Overview of CC-Link System
The CC-Link system connects distributed I/O modules, special function modules, etc. with
dedicated cables, and controls such modules from the PLC CPU.
1) By distributing each module to the facility equipment such as conveyor lines and machines,
the wiring conservation of the entire system can be accomplished.
2) Simple, high speed communication can be accomplished with modules that handle the ON/
OFF data such as I/Os or the numeric data.
3) Connections can be made to different types of devices made by partner manufacturers,
giving flexibility to the system.
2.2 Overview of CC-Link Master Block FX2N-16CCL-M
The CC-Link master block FX2N-16CCL-M is a special extension block which assigns an FX
Series PLC as the master station of the CC-Link system.
1) Remote I/O stations and remote device stations can be connected to the master station (FX
Series PLC).
2) By using the CC-Link interface block FX2N-32CCL, two or more FX Series PLCs can be
connected as remote device stations to configure a simple distributed system.
Master station : Station which controls the data link system
Remote I/O station : Remote station which handles only the 1-bit information
Remote device station:Remote station which handles both bit information and word information
Remote I/O station
FX
1N
/
2N
/
3U
Series PLC
CC-Link master block
FX
2N
-16CCL-M
Remote device station
Remote I/O station
Remote device station
CC-Link interface block
FX
2N
-32CCL
FX
0N
/
1N
/
2N
/
2NC
Series PLC
Partner manufacturer’s
product
/
2NC
/
3U
FX2N-16CCL-M CC-Link System Master Block

FX2N-16CCL-M CC-Link System Master Block Overview 2
2-2
2.3 Characteristics
This section describes the characteristics of the CC-Link.
1) Communication with remote I/O station
The switch ON/OFF status and the lamp ON/OFF status are communicated using remote
inputs (RX) and remote outputs (RY).
Remote inputs (RX) and remote outputs (RY) are assigned to the buffer memory (BFM)
numbers built in the FX2N-16CCL-M. (Refer to Subsections 4.6.6 and 4.6.7.)
*1 Devices which can be specified as FROM instruction transfer destinations or TO
instruction transfer sources can be used.
2) Communication with remote device station
Handshake signals (such as initial requests and error occurrence flags) are communicated
with remote device stations using remote inputs (RX) and remote outputs (RY).
The setting data and other data are communicated with remote device stations using
remote registers (RWw and RWr).
Remote inputs (RX), remote outputs (RY) and remote registers (RWw and RWr) are
assigned to the buffer memory (BFM) numbers built in the FX2N-16CCL-M. (Refer to Sub-
sections 4.6.8 and 4.6.9.)
*1 Devices which can be specified as FROM instruction transfer destinations or TO
instruction transfer sources can be used.
Internal relay
*1
Internal relay
*1
Remote input
RX(BFM)
Remote output
RY(BFM)
FROM
instruction
TO instruction
Input
Output
Link scan
Link scan
FX1N/2N/2NC
Series PLC Master station FX2N-16CCL-M Remote I/O station
Internal relay
KnM
*1
Internal relay
KnM
*1
Remote input
RX(BFM)
Remote
registers
RWw(BFM)
FROM
instruction
TO instruction
Remote input
RX
Remote output
RY
Link scan
Link scan
Data register
D
*1
Data register
D
*1
Remote
registers
RWr(BFM)
TO instruction
FROM
instruction
Remote
registers
RWw
Remote
registers
RWr
Link scan
Link scan
Voltmeter
Master station
FX2N-16CCL-M Remote device station
FX1N/2N/2NC
Series PLC
Remote output
RY(BFM)

FX2N-16CCL-M CC-Link System Master Block Overview 2
2-3
3) System down prevention (slave station cutoff function)
Because the system employs the bus method, even if there is a remote station which goes
down due to power OFF, etc., it will not affect the communication with other functioning
stations.
Also, in the case of a module equipped with a 2-piece terminal block, the module can be
replaced during data link. (Turn off the power of a module to be replaced, then replace it.)
However, if a cable is broken, data link is disabled in all stations. (Refer to Section 5.11.2.)
4) Reserved station function
By setting a station which is not actually connected now (which is planned for connection in
the future) as a reserved station, the station will not be handled as a faulty station.
Master
station Remote I/O station
(occupies 1 station)
Station No. 1
Remote I/O station
(occupies 1 station)
Station No. 2
Remote
device
station
(occupies 4
stations)
Station No. 3
Remote I/O station
(occupies 1 station)
Station No. 7
Remote
device
station
(occupies 4
stations)
Station No. 8
Master
station Remote I/O station
(occupies 1 station)
Station No. 1
Remote I/O station
(occupies 1 station)
Station No. 2
Remote
device
station
(occupies 4
stations)
Station No. 3
Remote I/O station
(occupies 1 station)
Station No. 7
Remote
device
station
(occupies 4
stations)
Station No. 8
Data link continues.
Faulty
station
Master
station Remote I/O station
(occupies 1 station)
Station No. 1
Remote I/O station
(occupies 1 station)
Station No. 2
Remote
device
station
(occupies 4
stations)
(Reserved station)
Station No. 3
Remote I/O station
(occupies 1 station)
Station No. 7 (Reserved station)
Station No. 8
Stations planned for
connection in the future
Remote I/O station
(occupies 1 station)

FX2N-16CCL-M CC-Link System Master Block Overview 2
2-4
5) Error invalid station function
A station which cannot execute the data link because the power is turned off, etc. can be
excluded from being handling as a "data link faulty station" in the master station.
Be careful, however, because errors will not be detected.
Master
station Remote I/O station
(occupies 1 station)
Station No. 1
Remote I/O station
(occupies 1 station)
Station No. 2
Remote
device
station
(occupies 4
stations)
Station No. 3
Remote I/O station
(occupies 1 station)
Station No. 7
Remote
device
station
(occupies 4
stations)
Station No. 8
Master
station Remote I/O station
(occupies 1 station)
Station No. 1
Remote I/O station
(occupies 1 station)
Station No. 2
Remote
device
station
(occupies 4
stations)
Station No. 3
Remote I/O station
(occupies 1 station)
Station No. 7
Remote
device
station
(occupies 4
stations)
Station No. 8
Not handled as a data
link faulty station.
Stations to be set as "error
invalid station"

FX2N-16CCL-M CC-Link System Master Block Overview 2
2-5
6) Parameter registration to the EEPROM
By registering the parameters to the EEPROM in advance, the parameter settings do not
have to be executed at each startup (power OFF →ON) of the master station.
The data stored in the EEPROM remains stored even if the power of the module is turned
off.
7) Data link status setting for a case where an error occurs in the CPU in the master station (PLC)
The data link status can be set (to "stop" or "continue") for a case where an "operation stop
error" such as a PLC program error occurs in the master station.
When an "operation continue error" such as a battery error occurs, the data link continues
without regard to the setting.
8) Status setting of the input data from a data link faulty station
The data input (received) from a data link faulty station can be cleared or kept (in the status
right before an error occurs).
9) Module reset function from a sequence program
When the switch setting is changed or an error occurs in the module, the module can be
reset from a sequence program without resetting the PLC.
(This excludes when the module has a module faulty input (BFM No. AHb0 is ON)).
10)RAS function
a) Automatic return function
When a station was disconnected from the link due to power OFF, etc. then returns to
normal status, the station can join the data link again automatically.
b) Link status check
Using the link special relay (SB) and the link special register (SW) in the buffer memory,
the current data link status can be checked.
c) Diagnosis function
Using the switch setting, the hardware and the cable wiring can be checked.
PLC CPU
SETM
TO
SETM
BFM#AHb10
BFM#AHb8
Parameter
information area
Buffer memory
Master station
E
2
PROM
Internal
memory
The data link is
executed using the
parameters registered
in the internal memory.
➀
➁
➂

FX2N-16CCL-M CC-Link System Master Block Overview 2
2-6
2.4 Major Differences from A/QnA/Q Series
Table 2.1:
Item FX Series master block A/QnA/Q Series master module
Applicable function • Master station •Masterstation • Local station
• Standby master station
Number of connected
modules • Remote I/O stations: 7 max. • Remote device stations: 8 max.
• Remote I/O stations: 64 max.
• Remote device stations: 42 max.
• Local/standby master/intelligent
device stations: 26 max.
Maximumlinkpoints per
station • Remote I/Os (RX/RY): 32 • Remote registers (RWr/RWw): 4 ←
Scan cycle • Asynchronous mode • Asynchronous mode
• Synchronous mode
Automatic refresh Not provided Provided
Intelligent device station Cannot be connected. Can be connected.