Mitsubishi Electric MELSEC Q Series User manual

MELSEC-Q CC-Link IE Controller Network
Reference Manual
-QJ71GP21-SX
-QJ71GP21S-SX

1
SAFETY PRECAUTIONS
(Read these precautions before using this product.)
Before using this product, please read this manual and the relevant manuals carefully and pay full attention
to safety to handle the product correctly.
The precautions given in this manual are concerned with this product only. For the safety precautions of the
programmable controller system, refer to the user's manual for the CPU module used.
In this manual, the safety precautions are classified into two levels: " WARNING" and " CAUTION".
Under some circumstances, failure to observe the precautions given under " CAUTION" may lead to
serious consequences.
Observe the precautions of both levels because they are important for personal and system safety.
Make sure that the end users read this manual and then keep the manual in a safe place for future
reference.
[Design Precautions]
WARNING
●For each station's operating status in the case of a communication error in the network, refer to this
manual. Malfunction due to a communication failure may result in an accident.
●When changing data of the running programmable controller from a peripheral connected to the CPU
module or from a personal computer connected to an intelligent function module, configure an
interlock circuit in the sequence program to ensure that the entire system will always operate safely.
For other forms of control (such as program modification or operating status change) of a running
programmable controller, read the relevant manuals carefully and ensure that the operation is safe
before proceeding.
Especially, when a remote programmable controller is controlled by an external device, immediate
action cannot be taken if a problem occurs in the programmable controller due to a communication
failure.
To prevent this, configure an interlock circuit in the sequence program, and determine corrective
actions to be taken between the external device and CPU module in case of a communication failure.
●Laser diodes are used in the optical transceivers of CC-Link IE Controller Network (class 1 in
accordance with IEC 60825-1). Do not look directly at a laser beam. Doing so may harm your eyes.
WARNING
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 minor or moderate injury or property damage.

2
[Design Precautions]
[Installation Precautions]
[Wiring Precautions]
CAUTION
●Do not install the control lines or communication cables together with the main circuit lines or power
cables.
Keep a distance of 100mm or more between them. Failure to do so may result in malfunction due to
noise.
CAUTION
●Use the programmable controller in an environment that meets the general specifications in the user's
manual for the CPU module used.
Failure to do so may result in electric shock, fire, malfunction, or damage to or deterioration of the
product.
●To mount the module, while pressing the module mounting lever located in the lower part of the
module, fully insert the module fixing projection(s) into the hole(s) in the base unit and press the
module until it snaps into place.
Incorrect mounting may cause malfunction, failure or drop of the module.
When using the programmable controller in an environment of frequent vibrations, fix the module with
a screw.
Tighten the screws within the specified torque range.
Undertightening can cause drop of the screw, short circuit or malfunction.
Overtightening can damage the screw and/or module, resulting in drop, short circuit, or malfunction.
●Shut off the external power supply (all phases) used in the system before mounting or removing the
module.
Failure to do so may result in damage to the product.
●Do not directly touch any conductive parts and electronic components of the module.
Doing so can cause malfunction or failure of the module.
WARNING
●Shut off the external power supply (all phases) used in the system before installation and wiring.
Failure to do so may result in electric shock or damage to the product.

3
[Wiring Precautions]
[Startup and Maintenance Precautions]
CAUTION
●Individually ground the FG terminal of the programmable controller with a ground resistance of 100
or less.
Failure to do so may cause a malfunction.
●Check the rated voltage and terminal layout before wiring the external power supply terminal block,
and connect the cables correctly. Connecting a power supply with a different voltage rating or faulty
wiring may cause a fire or failure.
●Tighten the terminal screws within the specified torque range.
Undertightening can cause short circuit, fire, or malfunction.
●Prevent foreign matter such as dust or wire chips from entering the module.
Such foreign matter can cause a fire, failure, or malfunction.
●Be sure to place the communication cables or power cables in a duct or clamp them.
If not, dangling cable may swing or inadvertently be pulled, resulting in damage to the module or
cables or malfunction due to poor contact.
●When disconnecting a communication cable or a power cable from the module, do not pull the cable
part.
For the cable with connector, hold the connector part of the cable.
For a cable connected to a terminal block, loosen the terminal block screws and disconnect the cable
from the module.
Pulling the cable connected to the module may result in malfunction or damage to the module or
cable.
●A protective film is attached to the top of the module to prevent foreign matter, such as wire chips,
from entering the module during wiring.
Do not remove the film during wiring.
Remove it for heat dissipation before system operation.
CAUTION
●Before performing online operations (especially, program modification, forced output, and operating
status change) for the running CPU module on another station from a peripheral over CC-Link IE
Controller Network, read relevant manuals carefully and ensure the safety.
Improper operation may damage machines or cause accidents.
●Do not disassemble or modify the module.
Doing so may cause failure, malfunction, injury, or a fire.

4
[Startup and Maintenance Precautions]
[Disposal Precautions]
CAUTION
●Use any radio communication device such as a cellular phone or PHS (Personal Handy-phone
System) more than 25cm away in all directions from the programmable controller.
Failure to do so may cause malfunction.
●Shut off the external power supply (all phases) used in the system before mounting or removing the
module.
Failure to do so may cause the module to fail or malfunction.
●Do not touch any terminal while power is on.
Failure to do so may cause malfunction.
●Shut off the external power supply (all phases) used in the system before cleaning the module or
retightening the terminal screws or module fixing screws.
Failure to do so may cause the module to fail or malfunction.
Undertightening can cause drop of the screw, short circuit or malfunction.
Overtightening can damage the screw and/or module, resulting in drop, short circuit, or malfunction.
●Before handling the module, touch a conducting object such as a grounded metal to discharge the
static electricity from the human body.
Failure to do so may cause the module to fail or malfunction.
●After the first use of the product, do not mount/remove the module to/from the base unit more than 50
times (IEC 61131-2 compliant).
Exceeding the limit of 50 times may cause malfunction.
CAUTION
●When disposing of this product, treat it as industrial waste.

5
CONDITIONS OF USE FOR THE PRODUCT
(1) Mitsubishi programmable controller ("the PRODUCT") shall be used in conditions;
i) where any problem, fault or failure occurring in the PRODUCT, if any, shall not lead to any major or serious accident;
and
ii) where the backup and fail-safe function are systematically or automatically provided outside of the PRODUCT for the
case of any problem, fault or failure occurring in the PRODUCT.
(2) The PRODUCT has been designed and manufactured for the purpose of being used in general industries.
MITSUBISHI SHALL HAVE NO RESPONSIBILITY OR LIABILITY (INCLUDING, BUT NOT LIMITED TO ANY AND ALL
RESPONSIBILITY OR LIABILITY BASED ON CONTRACT, WARRANTY, TORT, PRODUCT LIABILITY) FOR ANY
INJURY OR DEATH TO PERSONS OR LOSS OR DAMAGE TO PROPERTY CAUSED BY the PRODUCT THAT ARE
OPERATED OR USED IN APPLICATION NOT INTENDED OR EXCLUDED BY INSTRUCTIONS, PRECAUTIONS, OR
WARNING CONTAINED IN MITSUBISHI'S USER, INSTRUCTION AND/OR SAFETY MANUALS, TECHNICAL
BULLETINS AND GUIDELINES FOR the PRODUCT.
("Prohibited Application")
Prohibited Applications include, but not limited to, the use of the PRODUCT in;
• Nuclear Power Plants and any other power plants operated by Power companies, and/or any other cases in which the
public could be affected if any problem or fault occurs in the PRODUCT.
• Railway companies or Public service purposes, and/or any other cases in which establishment of a special quality
assurance system is required by the Purchaser or End User.
• Aircraft or Aerospace, Medical applications, Train equipment, transport equipment such as Elevator and Escalator,
Incineration and Fuel devices, Vehicles, Manned transportation, Equipment for Recreation and Amusement, and
Safety devices, handling of Nuclear or Hazardous Materials or Chemicals, Mining and Drilling, and/or other
applications where there is a significant risk of injury to the public or property.
Notwithstanding the above restrictions, Mitsubishi may in its sole discretion, authorize use of the PRODUCT in one or
more of the Prohibited Applications, provided that the usage of the PRODUCT is limited only for the specific
applications agreed to by Mitsubishi and provided further that no special quality assurance or fail-safe, redundant or
other safety features which exceed the general specifications of the PRODUCTs are required. For details, please
contact the Mitsubishi representative in your region.

CONTENTS
6
CONTENTS
SAFETY PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
CONDITIONS OF USE FOR THE PRODUCT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
MANUALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
COMPLIANCE WITH EMC AND LOW VOLTAGE DIRECTIVES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
MANUAL PAGE ORGANIZATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
GENERIC TERMS AND ABBREVIATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
DEFINITIONS OF TERMINOLOGY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
PACKING LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
CHAPTER 1 OVERVIEW 20
1.1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
CHAPTER 2 SYSTEM CONFIGURATION 34
2.1 CC-Link IE Controller Network Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
2.1.1 Single network system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
2.1.2 Redundant system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
2.1.3 Multi-network system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
2.2 Network Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
2.2.1 Order of optical fiber cables (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
2.2.2 CC-Link IE Controller Network interface board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
2.2.3 CC-Link IE Controller Network communication unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
2.3 Applicable Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
2.4 Checking the Function Version and Serial No. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
CHAPTER 3 SPECIFICATIONS 44
3.1 Performance Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
3.2 Function Lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
3.3 Buffer Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
3.3.1 Buffer memory list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
3.3.2 Transient transmission error log. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
3.3.3 Transmission path switching history. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
CHAPTER 4 FUNCTIONS 59
4.1 Cyclic Transmission Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
4.1.1 Communication using LB/LW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
4.1.2 Communication using LX/LY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
4.1.3 Link refresh . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
4.1.4 Direct access to link devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
4.1.5 Assurance of cyclic data integrity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
4.1.6 Cyclic transmission punctuality assurance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
4.1.7 Constant link scan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
4.1.8 Group cyclic transmission . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
4.1.9 Increase of send points by mounting multiple CC-Link IE Controller Network modules
of the same network No. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
4.1.10 Reserved station specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
4.1.11 Interlink transmission . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

7
4.1.12 Stop/restart of cyclic transmission . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
4.2 Transient Transmission Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .94
4.2.1 List of dedicated instructions and transient transmission range. . . . . . . . . . . . . . . . . . . . . . . 97
4.2.2 Group function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
4.2.3 Routing function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
4.2.4 Clock setting with a programming tool . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
4.2.5 Changing the number of transient transmissions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
4.3 IP Packet Transfer Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .106
4.3.1 System configuration of the IP packet transfer function . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
4.3.2 How to set the IP packet transfer function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
4.3.3 IP communication test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
4.3.4 Relay using CC-Link IE Field Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
4.3.5 Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
4.3.6 Example of communications using the IP packet transfer function . . . . . . . . . . . . . . . . . . . 118
4.3.7 Communication speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
4.4 RAS Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .124
4.4.1 Control station switching function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124
4.4.2 Loopback function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
4.4.3 Automatic return function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
4.4.4 Cable fault detection function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
4.4.5 Cable insertion error detection function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
4.4.6 Detection of duplicated control station or station No.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
4.4.7 External power supply function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
4.5 Interrupt Request to CPU Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .135
4.6 Station No. Setting by Sequence Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .136
4.7 Redundant-CPU-Compatible Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .138
4.7.1 Overview of redundant system operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138
4.7.2 System switching request to control system CPU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
CHAPTER 5 PREPARATION AND SETUP 145
5.1 Implementation and Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .145
5.1.1 Handling precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
5.2 Pre-operational Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .146
5.3 Part Names. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .147
5.4 Testing the CC-Link IE Controller Network Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .150
5.4.1 Hardware test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152
5.4.2 Self-loopback test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157
5.5 Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .162
5.6 Tests for CC-Link IE Controller Network Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .164
5.6.1 Circuit test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
5.6.2 Station-to-station test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169
5.7 Test Before CC-Link IE Controller Network Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .174
5.7.1 Communication test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174
CHAPTER 6 PARAMETER SETTING 177

8
6.1 Parameter List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .177
6.2 Network Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .180
6.3 Network Range Assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .183
6.3.1 LB/LW settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185
6.3.2 LX/LY settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192
6.3.3 Shared group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196
6.3.4 Pairing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199
6.3.5 Reserved station specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200
6.3.6 Supplementary settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 201
6.4 Network Operation Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .203
6.5 Refresh Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .204
6.5.1 Refresh parameter setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204
6.5.2 Change of transfer target CPU-side device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 212
6.5.3 Default settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221
6.6 Interrupt Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .225
6.7 Redundant Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .231
6.8 Interlink Transmission Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .232
6.9 Routing Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .238
CHAPTER 7 PROCESSING TIME 244
7.1 Link Scan Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .244
7.2 Link Refresh Time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .245
7.2.1 Interlink transmission time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 247
7.3 Cyclic Transmission Delay Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .250
7.3.1 Cyclic transmission delay time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250
7.3.2 Transmission delay time calculation example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 252
7.4 Dedicated Instruction Transmission Delay Time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .256
7.4.1 Link dedicated instruction transmission delay time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 256
7.4.2 CC-Link dedicated instruction transmission delay time . . . . . . . . . . . . . . . . . . . . . . . . . . . . 261
7.5 Cyclic Data Retention Time for System Switching in a Redundant System . . . . . . . . . . . . . .262
CHAPTER 8 PROGRAMMING 267
8.1 Program Example of a Single Network System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .267
8.1.1 System configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 267
8.1.2 Setting and communication contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 268
8.1.3 Program example of cyclic transmission . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 275
8.1.4 Program example of transient transmission. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 278
8.1.5 Program example of an interrupt request. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 283
8.1.6 Program example of error detection in other stations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 285
8.2 Program Example of a Multi-network System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .287
8.2.1 System configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 287
8.2.2 Setting and communication contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 288
8.2.3 Program example of cyclic transmission . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 303
8.2.4 Program example of transient transmission. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 303
8.3 Using Link Special Relay (SB) and Link Special Register (SW). . . . . . . . . . . . . . . . . . . . . . .306

9
CHAPTER 9 DEDICATED INSTRUCTIONS 324
9.1 List of Dedicated Instructions and Available Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .324
9.2 Precautions for Dedicated Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .326
9.2.1 Precautions for dedicated instructions (common) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 326
9.2.2 Precautions for link dedicated instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 328
9.2.3 Precautions for CC-Link dedicated instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 331
9.3 JP/GP. READ (Data Read from Programmable Controllers on Other Stations) . . . . . . . . . . .332
9.4 JP/GP.SREAD (Data Read from Programmable Controllers on Other Stations) . . . . . . . . . .344
9.5 JP/GP.WRITE (Data Write to Programmable Controllers on Other Stations). . . . . . . . . . . . .351
9.6 JP/GP.SWRITE (Data Write to Programmable Controllers on Other Stations). . . . . . . . . . . .365
9.7 J(P)/G(P).REQ (Remote RUN/STOP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .374
9.8 J(P)/G(P).REQ (Reading/Writing Clock Data) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .385
9.9 JP/GP.SEND (Data Transmission to Programmable Controllers on Other Stations) . . . . . . .400
9.10 JP/GP.RECV (Data Reception from Programmable Controllers on Other Stations) . . . . . . .413
9.11 Z.RECVS (Data Reception from Programmable Controllers on Other Stations) . . . . . . . . . .421
9.12 J(P).ZNRD (Data Read from Programmable Controllers on Other Stations) . . . . . . . . . . . . .427
9.13 J(P).ZNWR (Data Write to Programmable Controllers on Other Stations) . . . . . . . . . . . . . . .435
9.14 Z(P).RRUN (Remote RUN). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .443
9.15 Z(P).RSTOP (Remote STOP). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .451
9.16 Z(P).RTMRD (Clock Data Read from Programmable Controllers on Other Stations) . . . . . .459
9.17 Z(P).RTMWR (Clock Data Write to Programmable Controllers on Other Stations) . . . . . . . .467
9.18 Z(P).UINI (Station No. Setting of Own Station). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .476
9.19 J(P)/G(P).RIRD (Data Read from Programmable Controllers on Target Station) . . . . . . . . . .481
9.20 J(P)/G(P).RIWT (Data Write to Programmable Controllers on Target Station) . . . . . . . . . . . .489
CHAPTER 10 TROUBLESHOOTING 497
10.1 Troubleshooting Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .497
10.1.1 RUN LED is OFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 498
10.1.2 EXT.PW LED is OFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 498
10.1.3 MODE LED is OFF or flashing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 499
10.1.4 D LINK LED is OFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500
10.1.5 D LINK LED is flashing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 501
10.1.6 Cyclic transmission is disabled . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 502
10.1.7 Transient transmission is disabled . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 504
10.1.8 IP communications cannot be performed using the IP packet transfer function. . . . . . . . . . 505
10.1.9 Data link is disabled in the redundant system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 507
10.1.10 Data link is disabled on a station of a Basic model QCPU or safety CPU . . . . . . . . . . . . . . 510
10.2 Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .511
10.2.1 Checking the error code. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 511
10.2.2 Error code list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 514
10.3 CC IE Control Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .526
10.3.1 Network information display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 528
10.3.2 Select station network device status display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 531
10.3.3 Logging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 533
10.3.4 System monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 536

10
10.3.5 Remote operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 540
10.4 Checking the Error Description with the CC IE Control Diagnostics. . . . . . . . . . . . . . . . . . . .541
10.4.1 Cable disconnection or line being established . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 543
10.4.2 Cable insertion error. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 545
10.4.3 Monitoring timeout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 547
10.4.4 Parameter unreceived . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 548
10.4.5 Own station No. is out of range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 549
10.4.6 Own station is set as reserved station . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 551
10.4.7 Own station No. duplication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 553
10.4.8 Control station duplication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 556
10.4.9 Control station duplication and own station No. duplication. . . . . . . . . . . . . . . . . . . . . . . . . 559
10.4.10 Illegal network No. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 561
10.4.11 CPU module stop error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 563
10.4.12 CPU module power stop error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 565
10.4.13 External power not supplied. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 566
APPENDICES 568
Appendix 1 Link Special Relay (SB) List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .568
Appendix 2 Link Special Register (SW) List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .584
Appendix 3 Functional Upgrade of CC-Link IE Controller Network . . . . . . . . . . . . . . . . . . . . . . . . .606
Appendix 4 Comparison Between CC-Link IE Controller Network and MELSECNET/H . . . . . . . . .612
Appendix 4.1 Comparison of specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 612
Appendix 4.2 Comparison of function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 615
Appendix 4.3 Link special relays (SB) and link special registers (SW) . . . . . . . . . . . . . . . . . . 621
Appendix 4.4 Precautions for system replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 636
Appendix 4.5 Precautions for program replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 639
Appendix 5 Parameter Sheet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .645
Appendix 5.1 Link device assignment sheet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 650
Appendix 5.2 Quantity setting parameter sheet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 651
Appendix 5.3 Network range assignment parameter sheet (for control station only) . . . . . . . . . 652
Appendix 5.4 Refresh parameter sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 657
Appendix 5.5 Interrupt setting parameter sheet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 659
Appendix 5.6 Interlink transmission parameter assignment sheet . . . . . . . . . . . . . . . . . . . . . 660
Appendix 5.7 Routing parameter sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 662
Appendix 6 External Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .663
Appendix 6.1 QJ71GP21-SX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 663
Appendix 6.2 QJ71GP21S-SX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 664
INDEX 665
REVISIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 667
WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 669

11
MANUALS
The following manual is also related to this product.
Please purchase it if necessary.
COMPLIANCE WITH EMC AND LOW VOLTAGE
DIRECTIVES
(1) For programmable controller system
To ensure that Mitsubishi programmable controllers maintain EMC and Low Voltage Directives when incorporated
into other machinery or equipment, certain measures may be necessary. Please refer to one of the following
manuals.
• QCPU User's Manual (Hardware Design, Maintenance and Inspection)
• Safety Guidelines (This manual is included with the CPU module or base unit.)
The CE mark on the side of the programmable controller indicates compliance with EMC and Low Voltage
Directives.
(2) For the product
To ensure that this product maintains EMC and Low Voltage Directives, please refer to one of the manuals listed
under (1).
Manual Name Manual No.
(Model Code)
CC-Link IE Controller Network Interface Board User's Manual (For SW1DNC-MNETG-B)
Specifications, procedures before operation, system configuration, settings, functions, programming, and
troubleshooting of the CC-Link IE Controller Network interface board
(Sold separately)
SH080691ENG
(13JZ02)
GT16 User's Manual (Hardware)
Specifications, part names, installation, power supply wiring, and external dimensions of the GT16 models, and
optional products
(Sold separately)
SH-080928ENG
(1D7MD3)
GT15 User's Manual
Specifications, part names, installation, power supply wiring, and external dimensions of the GT15 models, and
optional products and utilities
(Sold separately)
SH-080528ENG
(1D7M23)
Related Manual

12
MANUAL PAGE ORGANIZATION
In this manual, pages are organized and the symbols are used as shown below.
The following illustration is for explanation purpose only, and should not be referred to as an actual documentation.
*1 The mouse operation example is provided below.
The section of
the current page is shown.
The chapter of
the current page is shown.
"" is used for
window names and items.
[ ] is used for items
in the menu bar and
the project window.
shows operating
procedures.
shows reference
manuals.
shows notes that
require attention.
shows mouse
operations.*1
shows
reference pages.
shows setting or
operating examples.
Ex.
shows useful
information.
[Online] [Write to PLC...]
Select [Online] on the menu bar,
and then select [Write to PLC...].
Project window [Parameter]
[PLC Parameter]
Select [Project] from the view selection
area to open the Project window.
Ex.
Ex.
In the Project window, expand [Parameter] and
select [PLC Parameter].
View selection area
A window selected in the view selection area is displayed.
Menu bar

13
The following explains generic terms and abbreviations for CPU modules and networking station type codes that are
used in the text, tables, and figures.
(1) Generic terms and abbreviations for CPU modules
(2) Networking station type codes
Ex.
• Network No.3, control station, station No.6 • • • 3MP6
• Network No.5, normal station, station No.3 • • • 5NS3
Generic terms
and abbreviations
for CPU modules
CPU model
Q00J
Q00
Q01
Q02
Q02H
Q06H
Q12H
Q25H
Q02PH
Q06PH
Q12PH
Q25PH
Q12PRH
Q25PRH
Q00UJ
Q00U
Q01U
Q02U
Q03UD
Q04UDH
Q06UDH
Q10UDH
Q13UDH
Q20UDH
Q26UDH
Q03UDE
Q04UDEH
Q06UDEH
Q10UDEH
Q13UDEH
Q20UDEH
Q26UDEH
Q50UDEH
Q100UDEH
Q03UDV
Q04UDV
Q06UDV
Q13UDV
Q26UDV
QS001
Q06CCPU-V-H01
Q06CCPU-V
Q06CCPU-V-B
Q12DCCPU-V
Q24DHCCPU-V
Q24DHCCPU-VG
Q24DHCCPU-LS
Q26DHCCPU-LS
Basic model QCPU —
High Performance
model QCPU ——
Process CPU — —
Redundant CPU — —
Universal model
QCPU — —
Safety CPU — —
C Controller module —
A module other than
a Universal model
QCPU
——
A module other than
a safety CPU —
MP
Station No.
Abbreviation
Network No.
1 to 120
MP: Control station, NS: Normal station
1 to 239

14
(3) Module illustration
(4) Module status
Module illustration Description
CC-Link IE Controller Network module
CC-Link IE Controller Network module with external power supply function
CC-Link IE Controller Network interface board
CC-Link IE Controller Network communication unit
MELSECNET/H module
Module status Description
Normally operating station
Faulty station (Cyclic transmission is stopped.)
External power
supply

15
GENERIC TERMS AND ABBREVIATIONS
This manual describes using the following generic terms and abbreviations, unless otherwise specified.
Generic term and abbreviation Description
Programming tool A generic term for GX Developer and GX Works2
GX Developer The product name of the software package for the MELSEC programmable controllers
GX Works2
CC-Link IE Controller Network module The abbreviation for the QJ71GP21-SX and QJ71GP21S-SX CC-Link IE Controller Network
module
CC-Link IE Controller Network module
with external power supply function The abbreviation for the QJ71GP21S-SX CC-Link IE Controller Network module
CC-Link IE Controller Network interface
board
The abbreviation for the Q80BD-J71GP21-SX, Q80BD-J71GP21S-SX, Q81BD-J71GP21-SX,
and Q81BD-J71GP21S-SX CC-Link IE Controller Network interface boards
MELSECNET/H The abbreviation for the MELSECNET/H network system
MELSECNET/H module The abbreviation for the QJ71LP21, QJ71LP21-25, QJ71LP21S-25, QJ71LP21G, QJ71LP21GE,
QJ71BR11, and QJ71NT11B MELSECNET/H network modules
MELSECNET/10 The abbreviation for the MELSECNET/10 network system
CC-Link IE Field Network A high-speed and large-capacity open field network that is based on Ethernet (1000BASE-T)
Ethernet adapter module The abbreviation for the NZ2GF-ETB CC-Link IE Field Network Ethernet adapter module
Ethernet device A generic term for devices, such as personal computers, that support IP (Internet Protocol)
communications
Data link A generic term for cyclic transmission and transient transmission
Network module A generic term for the CC-Link IE Controller Network module, CC-Link IE Field Network module
and MELSECNET/H module
Basic model QCPU A generic term for the Q00JCPU, Q00CPU, and Q01CPU
High Performance model QCPU A generic term for the Q02CPU, Q02HCPU, Q06HCPU, Q12HCPU, and Q25HCPU
Process CPU A generic term for the Q02PHCPU, Q06PHCPU, Q12PHCPU, and Q25PHCPU
Redundant CPU A generic term for the Q12PRHCPU and Q25PRHCPU
Universal model QCPU
A generic term for the Q00UJCPU, Q00UCPU, Q01UCPU, Q02UCPU, Q03UDCPU,
Q03UDVCPU, Q03UDECPU, Q04UDHCPU, Q04UDVCPU, Q04UDEHCPU, Q06UDHCPU,
Q06UDVCPU, Q06UDEHCPU, Q10UDHCPU, Q10UDEHCPU, Q13UDHCPU, Q13UDVCPU,
Q13UDEHCPU, Q20UDHCPU, Q20UDEHCPU, Q26UDHCPU, Q26UDVCPU, Q26UDEHCPU,
Q50UDEHCPU, and Q100UDEHCPU
Safety CPU The abbreviation for the QS001CPU
C Controller module A generic term for the Q06CCPU-V, Q06CCPU-V-B, Q12DCCPU-V, Q24DHCCPU-V,
Q24DHCCPU-VG, Q24DHCCPU-LS, and Q26DHCCPU-LS
High-speed Universal model QCPU A generic term for the Q03UDVCPU, Q04UDVCPU, Q06UDVCPU, Q13UDVCPU, and
Q26UDVCPU
Built-in Ethernet port QCPU
A generic term for the Q03UDVCPU, Q03UDECPU, Q04UDVCPU, Q04UDEHCPU,
Q06UDVCPU, Q06UDEHCPU, Q10UDEHCPU, Q13UDVCPU, Q13UDEHCPU, Q20UDEHCPU,
Q26UDVCPU, Q26UDEHCPU, Q50UDEHCPU, and Q100UDEHCPU
READ The abbreviation for JP.READ and GP.READ
SREAD The abbreviation for JP.SREAD and GP.SREAD
WRITE The abbreviation for JP.WRITE and GP.WRITE
SWRITE The abbreviation for JP.SWRITE and GP.SWRITE
REQ The abbreviation for J.REQ, JP.REQ, G.REQ, and GP.REQ
SEND The abbreviation for JP.SEND and GP.SEND
RECV The abbreviation for JP.RECV and GP.RECV
RECVS The abbreviation for Z.RECVS

16
ZNRD The abbreviation for J.ZNRD and JP.ZNRD
ZNWR The abbreviation for J.ZNWR and JP.ZNWR
RRUN The abbreviation for Z.RRUN and ZP.RRUN
RSTOP The abbreviation for Z.RSTOP and ZP.RSTOP
RTMRD The abbreviation for Z.RTMRD and ZP.RTMRD
RTMWR The abbreviation for Z.RTMWR and ZP.RTMWR
UINI The abbreviation for Z.UINI and ZP.UINI
RIRD The abbreviation for J.RIRD, JP.RIRD, G.RIRD, and GP.RIRD
RIWT The abbreviation for J.RIWT, JP.RIWT, G.RIWT, and GP.RIWT
Generic term and abbreviation Description

17
DEFINITIONS OF TERMINOLOGY
Definitions of the terms used in this manual are explained below.
Term Description
Cyclic transmission
A function by which data are periodically exchanged among stations on the same network using link
devices (LB, LW, LX, and LY) of a CC-Link IE Controller Network module.
• LB/LW is used to send data of one station to all stations. (1:N communication)
• LX/LY is used to send data of one station to another station. (1:1 communication)
Transient transmission A function of communication with another station, which is used when requested by a dedicated instruction
or a programming tool
Link dedicated instruction
A dedicated instruction used for transient transmission with a programmable controller on another station.
This instruction allows a master/local module to communicate with programmable controllers on the same
network.
CC-Link dedicated instruction Dedicated instruction that is used for transient transmission with CC-Link IE Controller Network compatible
devices. This allows communication with a station on the same network.
RAS The abbreviation for Reliability, Availability, and Serviceability.
This term refers to usability of automated equipment.
Control station Only one station that controls the network to which it is connected.
Each station's send range for cyclic transmission is assigned to the control station.
Normal station Station that performs cyclic transmission according to the range assignment of the control station
Reserved station A station reserved for future use. This station is not actually connected, but counted as a connected
station.
Relay station A station that includes two or more network modules. Data are passed through this station to stations on
other networks.
Undefined station Station to which a station No. is to be set in the sequence program, however, that has presently no station
No. because the UINI instruction has not been executed yet.
Return Processing that restarts data link when a station recovers from an error
Disconnection Processing that stops data link if a data link error occurs.
Device A device (X, Y, M, D, or others) in a CPU module
Link device A device (LB, LW, LX, or LY) in a module on CC-Link IE Controller Network
Link scan time Time required for all the stations on the network to transmit data.
The link scan time depends on data volume and the number of transient transmission requests.
Link refresh
Data transfer between a link device in a module on CC-Link IE Controller Network and a device in a CPU
module.
Link refresh is performed in the END processing of the CPU module's sequence scan.
Routing
A process of selecting paths for communication with other networks.
CC-Link IE Controller Network requires communication paths to be preset using routing parameters to
communicate with stations on different networks.
Buffer memory Memory area in the CC-Link IE Controller Network module, in which data are temporarily stored
Baton pass A token to send data over a network
Control station switching time Time taken from when the control station went down due to a reason such as power-off until data link is
started by the sub-control station
Shared group No. Number that is assigned to a station to allow it to share cyclic data with any given stations.
Cyclic data can be shared only with stations of the same group.
Group No.
Number that is assigned for transient transmission to any given stations.
By specifying a group of stations as transient transmission target, data can be sent to the stations of the
same group No.
Control CPU
A CPU module that controls connected I/O modules and intelligent function modules.
In a multiple CPU system, there are multiple CPU modules and each connected module can be controlled
by a different CPU module.
Control system CPU A CPU module that controls operations in a redundant system

18
Standby system CPU A CPU module that stands by in case the control system fails in a redundant system
System A CPU A CPU module where the system A connector of a tracking cable is connected in a redundant system
System B CPU A CPU module where the system B connector of a tracking cable is connected in a redundant system
Term Description