SYSMAC
CS/CJ Series
CS1W-FLN22 (100Base-TX)
CJ1W-FLN22 (100Base-TX)
FL-net Units
OPERATION MANUAL
CS1W-FLN22 (100Base-TX)
CJ1W-FLN22 (100Base-TX)
FL-net Units
Operation Manual
Revised October 2010
iv
Notice:
r
f
OMRON products are manufactured for use according to proper procedures by a qualified operator
and only for the purposes described in this manual.
The following conventions are used to indicate and classify precautions in this manual. Always heed
the information provided with them. Failure to heed precautions can result in injury to people or damage to property.
!DANGERIndicates an imminently hazardous situation which, if not avoided, will result in death or
serious injury. Additionally, there may be severe property damage.
!WARNINGIndicates a potentially hazardous situation which, if not avoided, could result in death or
serious injury. Additionally, there may be severe property damage.
!CautionIndicates a potentially hazardous situation which, if not avoided, may result in minor or
moderate injury, or property damage.
OMRON Product References
All OMRON products are capitalized in this manual. The word “Unit” is also capitalized when it refers to
an OMRON product, regardless of whether or not it appears in the proper name of the product.
The abbreviation “Ch,” which appears in some displays and on some OMRON products, often means
“word” and is abbreviated “Wd” in documentation in this sense.
The abbreviation “PLC” means Programmable Controller.
Visual Aids
The following headings appear in the left column of the manual to help you locate different types of
information.
OMRON, 2004
All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form, o
by any means, mechanical, electronic, photocopying, recording, or otherwise, without the prior written permission o
OMRON.
No patent liability is assumed with respect to the use of the information contained herein. Moreover, because OMRON is constantly striving to improve its high-quality products, the information contained in this manual is subject to change without
notice. Every precaution has been taken in the preparation of this manual. Nevertheless, OMRON assumes no responsibility
for errors or omissions. Neither is any liability assumed for damages resulting from the use of the information contained in
this publication.
Note Indicates information of particular interest for efficient and convenient opera-
tion of the product.
1,2,3...1. Indicates lists of one sort or another, such as procedures, checklists, etc.
This manual describes the installation and operation of the CS1W-FLN22 (100Base-TX) and CJ1WFLN22 (100Base-TX) FL-net Units.
FL-net Units are used to connect to FL-net networks.
Please read this manual and all related manuals listed in the following table carefully and be sure you
understand the information provided before attempting to install and operate an FL-net Unit.
NameCat. No.Contents
SYSMAC CS/CJ Series
CS1W-FLN22 (100Base-TX) and CJ1W-FLN22
(100Base-TX) FL-net Units
Operation Manual
(this manual)
SYSMAC CS/CJ Series
CS1W-ETN21, CJ1W-ETN21
100Base-TX Ethernet Units
Operation Manual, Construction of Network
CXONE-AL@@C-E
CX-One FA Integrated Tool Package Setup Manual
WS02-CXPC1-E-V61
SYSMAC CX-Programmer Ver. 6.1
Operation Manual Function Blocks
CXONE-AL@@C-E
CX-Integrator Operation Manual
SYSMAC CS Series
CS1G/H-CPU@@-EV1, CS1G/H-CPU@@H
Programmable Controllers Operation Manual
SYSMAC CJ Series
CJ1G-CPU@@, CJ1M-CPU@@, CJ1G-CPU@@P,
CJ1G/H-CPU@@H
Programmable Controllers Operation Manual
SYSMAC CS/CJ Series
CS1G/H-CPU@@-EV1, CS1G/H-CPU@@H,
CS1D-CPU@@H, CS1D-CPU@@S, CJ1GCPU@@, CJ1M-CPU@@, CJ1G-CPU@@P, C J 1G /
H-CPU@@H
Programmable Controllers Programming Manual
W440Describes the installation and operation of the CS1W-
FLN22 and CJ1W-FLN22 FL-net Units.
Refer to the Communications Commands Reference Manual (W342) for information on FINS commands that
can be addressed to CS/CJ-series CPU Units.
W420Provides information on operating and installing
100Base-TX Ethernet Units, including details on basic
settings and FINS communications.
W444Provides an overview of the CX-One FA Integrated Tool
and installation procedures.
W446Provides information on installing and operating the CX-
Programmer for all functions except for function blocks.
W447Provides specifications and operating procedures for
function blocks.
When programming, refer to the CJ Series (W339) or CJ
Series (W393) Programmable Controllers Operation
Manual, CS/CJ Series Programmable Controllers Programming Manual (W394), and CS/CJ Series Programmable Controllers Instructions Reference Manual
(W340).
W445Describes CX-Integrator operating procedures and pro-
vides information on network configuration (data links,
routing tables, Communications Units setup, etc.
W339Provides an outline of and describes the features, sys-
tem configuration, installation, wiring, I/O memory allocations, and troubleshooting for the CS-series PLCs.
Use this manual together with the CS/CJ Series Pro-
grammable Controllers Programming Manual (W394).
W393Provides an outline of and describes the features, sys-
tem configuration, installation, wiring, I/O memory allocations, and troubleshooting for the CJ-series PLCs.
Use this manual together with the CS/CJ Series Pro-
W340Describes the ladder diagram programming instructions
supported by CS/CJ-series PLCs.
Use this manual together with the CJ Series (W339) or
CJ Series (W393) Programmable Controllers Operation
Manual and the CS/CJ Series Programmable Controllers Programming Manual (W394).
W342Describes the C-series (Host Link) and FINS communi-
cations commands used with CS/CJ-series PLCs.
This manual describes communications commands
addressed to the CPU Unit. The communications path is
not relevant, i.e., communications can be performed via
a serial port on the CPU Unit, Serial Communications
Unit/Board, or a Communications Unit.
xii
About this Manual, Continued
This manual contains the following sections.
Section 1 introduces the overall structure of an FL-net (Ver. 2.00) network, outlines the features of the
FL-net (Ver. 2.00) Unit, describes the communications protocols used by an FL-net (Ver. 2.00) network, and provides basic precautions for use of the network.
Section 2 describes the communications functions that can be used with the FL-net (Ver. 2.00) Units.
Section 3 explains the procedure for starting up the FL-net (Ver. 2.00) Unit, including mounting to the
PLC, making the required settings, and checking communications.
Section 4 explains the System Setup and the words allocated in the CIO Area and the DM Area for
FL-net (Ver. 2.00) Units.
Section 5 explains the Data Link function, including an overview and examples of how to make the
required settings.
Section 6 describes the message transmission used by an FL-net (Ver. 2.00) network.
Section 7 provides information on communicating on FL-net Systems and interconnected networks
using FINS commands. The information provided in the section deals only with FINS communications
in reference to FL-net (Ver. 2.00) Units.
Section 8 describes the communications system, communications cycle time, communications cycle
time calculation, data link I/O response time, data link I/O response time calculation, and message service transmission delays.
Section 9 describes functions that allow you to test communications.
Section 10 describes information and procedures that can be used to troubleshoot problems that
sometimes occur with FL-net (Ver. 2.00) Unit and FL-net communications.
Section 11 describes the Support Software used to make settings for the FL-net Units.
!WARNING Failure to read and understand the information provided in this manual may result in per-
sonal injury or death, damage to the product, or product failure. Please read each section
in its entirety and be sure you understand the information provided in the section and
related sections before attempting any of the procedures or operations given.
xiii
xiv
Read and Understand this Manual
Please read and understand this manual before using the product. Please consult your OMRON
representative if you have any questions or comments.
Warranty and Limitations of Liability
WARRANTY
OMRON's exclusive warranty is that the products are free from defects in materials and workmanship for a
period of one year (or other period if specified) from date of sale by OMRON.
OMRON MAKES NO WARRANTY OR REPRESENTATION, EXPRESS OR IMPLIED, REGARDING NONINFRINGEMENT, MERCHANTABILITY, OR FITNESS FOR PARTICULAR PURPOSE OF THE
PRODUCTS. ANY BUYER OR USER ACKNOWLEDGES THAT THE BUYER OR USER ALONE HAS
DETERMINED THAT THE PRODUCTS WILL SUITABLY MEET THE REQUIREMENTS OF THEIR
INTENDED USE. OMRON DISCLAIMS ALL OTHER WARRANTIES, EXPRESS OR IMPLIED.
LIMITATIONS OF LIABILITY
OMRON SHALL NOT BE RESPONSIBLE FOR SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES,
LOSS OF PROFITS OR COMMERCIAL LOSS IN ANY WAY CONNECTED WITH THE PRODUCTS,
WHETHER SUCH CLAIM IS BASED ON CONTRACT, WARRANTY, NEGLIGENCE, OR STRICT
LIABILITY.
In no event shall the responsibility of OMRON for any act exceed the individual price of the product on which
liability is asserted.
IN NO EVENT SHALL OMRON BE RESPONSIBLE FOR WARRANTY, REPAIR, OR OTHER CLAIMS
REGARDING THE PRODUCTS UNLESS OMRON'S ANALYSIS CONFIRMS THAT THE PRODUCTS
WERE PROPERLY HANDLED, STORED, INSTALLED, AND MAINTAINED AND NOT SUBJECT TO
CONTAMINATION, ABUSE, MISUSE, OR INAPPROPRIATE MODIFICATION OR REPAIR.
xv
Application Considerations
SUITABILITY FOR USE
OMRON shall not be responsible for conformity with any standards, codes, or regulations that apply to the
combination of products in the customer's application or use of the products.
At the customer's request, OMRON will provide applicable third party certification documents identifying
ratings and limitations of use that apply to the products. This information by itself is not sufficient for a
complete determination of the suitability of the products in combination with the end product, machine,
system, or other application or use.
The following are some examples of applications for which particular attention must be given. This is not
intended to be an exhaustive list of all possible uses of the products, nor is it intended to imply that the uses
listed may be suitable for the products:
• Outdoor use, uses involving potential chemical contamination or electrical interference, or conditions or
uses not described in this manual.
• Nuclear energy control systems, combustion systems, railroad systems, aviation systems, medical
equipment, amusement machines, vehicles, safety equipment, and installations subject to separate
industry or government regulations.
• Systems, machines, and equipment that could present a risk to life or property.
Please know and observe all prohibitions of use applicable to the products.
NEVER USE THE PRODUCTS FOR AN APPLICATION INVOLVING SERIOUS RISK TO LIFE OR
PROPERTY WITHOUT ENSURING THAT THE SYSTEM AS A WHOLE HAS BEEN DESIGNED TO
ADDRESS THE RISKS, AND THAT THE OMRON PRODUCTS ARE PROPERLY RATED AND
INSTALLED FOR THE INTENDED USE WITHIN THE OVERALL EQUIPMENT OR SYSTEM.
PROGRAMMABLE PRODUCTS
OMRON shall not be responsible for the user's programming of a programmable product, or any
consequence thereof.
xvi
Disclaimers
CHANGE IN SPECIFICATIONS
Product specifications and accessories may be changed at any time based on improvements and other
reasons.
It is our practice to change model numbers when published ratings or features are changed, or when
significant construction changes are made. However, some specifications of the products may be changed
without any notice. When in doubt, special model numbers may be assigned to fix or establish key
specifications for your application on your request. Please consult with your OMRON representative at any
time to confirm actual specifications of purchased products.
DIMENSIONS AND WEIGHTS
Dimensions and weights are nominal and are not to be used for manufacturing purposes, even when
tolerances are shown.
PERFORMANCE DATA
Performance data given in this manual is provided as a guide for the user in determining suitability and does
not constitute a warranty. It may represent the result of OMRON's test conditions, and the users must
correlate it to actual application requirements. Actual performance is subject to the OMRON Warranty and
Limitations of Liability.
ERRORS AND OMISSIONS
The information in this manual has been carefully checked and is believed to be accurate; however, no
responsibility is assumed for clerical, typographical, or proofreading errors, or omissions.
xvii
xviii
PRECAUTIONS
This section provides general precautions for using the CS/CJ-series Programmable Controllers (PLCs) and related devices.
The information contained in this section is important for the safe and reliable application of Programmable
Controllers. You must read this section and understand the information contained before attempting to set up or
operate a PLC system.
This manual is intended for the following personnel, who must also have
knowledge of electrical systems (an electrical engineer or the equivalent).
• Personnel in charge of installing FA systems.
• Personnel in charge of designing FA systems.
• Personnel in charge of managing FA systems and facilities.
2General Precautions
The user must operate the product according to the performance specifications described in the operation manuals.
Before using the product under conditions which are not described in the
manual or applying the product to nuclear control systems, railroad systems,
aviation systems, vehicles, combustion systems, medical equipment, amusement machines, safety equipment, and other systems, machines, and equipment that may have a serious influence on lives and property if used
improperly, consult your OMRON representative.
Make sure that the ratings and performance characteristics of the product are
sufficient for the systems, machines, and equipment, and be sure to provide
the systems, machines, and equipment with double safety mechanisms.
This manual provides information for programming and operating the Unit. Be
sure to read this manual before attempting to use the Unit and keep this manual close at hand for reference during operation.
!WARNING It is extremely important that a PLC and all PLC Units be used for the speci-
fied purpose and under the specified conditions, especially in applications that
can directly or indirectly affect human life. You must consult with your OMRON
representative before applying a PLC System to the above-mentioned applications.
3Safety Precautions
!WARNING Do not attempt to take any Unit apart while the power is being supplied. Doing
so may result in electric shock.
!WARNING Do not touch any of the terminals or terminal blocks while the power is being
supplied. Doing so may result in electric shock.
!WARNING Do not attempt to disassemble, repair, or modify any Units. Any attempt to do
so may result in malfunction, fire, or electric shock.
!Caution Execute online editing only after confirming that no adverse effects will be
caused by extending the cycle time. Otherwise, the input signals may not be
readable.
xx
Operating Environment Precautions4
• Emergency stop circuits, interlock circuits, limit circuits, and similar safety
measures must be provided in external control circuits.
!Caution Tighten the screws on the terminal block of the AC Power Supply Unit to the
torque specified in the operation manual. The loose screws may result in
burning or malfunction.
4Operating Environment Precautions
!Caution Do not operate the control system in the following locations:
• Locations subject to direct sunlight.
• Locations subject to temperatures or humidity outside the range specified
in the specifications.
• Locations subject to condensation as the result of severe changes in temperature.
• Locations subject to corrosive or flammable gases.
• Locations subject to dust (especially iron dust) or salts.
• Locations subject to exposure to water, oil, or chemicals.
• Locations subject to shock or vibration.
!Caution Take appropriate and sufficient countermeasures when installing systems in
the following locations:
• Locations subject to static electricity or other forms of noise.
• Locations subject to strong electromagnetic fields.
• Locations subject to possible exposure to radioactivity.
• Locations close to power supplies.
5Application Precautions
Observe the following precautions when using the FL-net Unit.
!WARNING Always heed these precautions. Failure to abide by the following precautions
could lead to serious or possibly fatal injury.
• Always connect to a ground of 100 Ω or less when installing the Units. Not
connecting to a ground of 100 Ω or less may result in electric shock.
xxi
Application Precautions5
• Always turn OFF the power supply to the CPU Unit, Slaves, and Communications Units before attempting any of the following. Not turning OFF
the power supply may result in malfunction or electric shock.
• Mounting or dismounting I/O Units, CPU Units, Memory Packs, or
Master Units.
• Assembling the Units.
• Setting DIP switches or rotary switches.
• Connecting cables or wiring the system.
!Caution Failure to abide by the following precautions could lead to faulty operation of
the Ethernet Unit or the system, or could damage the Ethernet Unit. Always
heed these precautions.
• Fail-safe measures must be taken by the customer to ensure safety in the
event of incorrect, missing, or abnormal signals caused by broken signal
lines, momentary power interruptions, or other causes.
• Interlock circuits, limit circuits, and similar safety measures in external circuits (i.e., not in the Programmable Controller) must be provided by the
customer.
• Always use the power supply voltages specified in the operation manuals.
An incorrect voltage may result in malfunction or burning.
• Take appropriate measures to ensure that the specified power with the
rated voltage and frequency is supplied. Be particularly careful in places
where the power supply is unstable. An incorrect power supply may result
in malfunction.
• Install external breakers and take other safety measures against short-circuiting in external wiring. Insufficient safety measures against short-circuiting may result in burning.
• Make sure that all the Backplane mounting screws, terminal block screws,
and cable connector screws are tightened to the torque specified in the
relevant manuals. Incorrect tightening torque may result in malfunction.
• Leave the label attached to the Unit when wiring to prevent wire clippings
from entering the Unit. Removing the label may result in malfunction if foreign matter enters the Unit.
• Remove the label after the completion of wiring to ensure proper heat dissipation. Leaving the label attached may result in malfunction.
• Use crimp terminals for wiring. Do not connect bare stranded wires
directly to terminals. Connection of bare stranded wires may result in
burning.
• Double-check all wiring and switch settings before turning ON the power
supply. Incorrect wiring may result in burning.
• Wire all connections correctly.
• Mount Units only after checking terminal blocks and connectors completely.
• Make sure that the terminal blocks, expansion cables, and other items
with locking devices are locked in place.
• When transporting the Unit, use special packing boxes and protect it from
being exposed to excessive vibration or impacts during transportation.
xxii
Conformance to EC Directives6
• Check the user program and set parameters for proper execution before
actually running it on the Unit. Not checking the program may result in
unexpected operation.
• Observe the following precautions when wiring the communications
cable.
• Separate the communications cables from the power lines or high-tension lines.
• Do not bend the communications cables past their natural bending radius.
• Do not pull on the communications cables.
• Do not place heavy objects on top of the communications cables.
• Always lay communications cable inside ducts.
• Use appropriate communications cables.
• Before touching a Unit, be sure to first touch a grounded metallic object in
order to discharge any static build-up. Not doing so may result in malfunction or damage.
• Confirm that no adverse effect will occur in the system before attempting
any of the following. Not doing so may result in an unexpected operation.
• Changing the operating mode of the PLC (including changing the Startup Mode setting).
• Force-setting/force-resetting any bit in memory.
• Changing the present value of any word or any set value in memory.
• Check that data link tables and parameters are properly set before starting operation. Not doing so may result in unexpected operation. Even if
the tables and parameters are properly set, confirm that no adverse
effects will occur in the system before running or stopping data links.
• Install the FL-net Units separated sufficiently from devices that generate
high-frequency noise.
• Do not drop the FL-net Unit or subject it to excessive shocks or vibrations.
6Conformance to EC Directives
6-1Applicable Directives
• EMC Directives
• Low Voltage Directive
6-2Concepts
EMC Directives
OMRON devices that comply with EC Directives also conform to the related
EMC standards so that they can be more easily built into other devices or the
overall machine. The actual products have been checked for conformity to
EMC standards (see the following note). Whether the products conform to the
standards in the system used by the customer, however, must be checked by
the customer.
EMC-related performance of the OMRON devices that comply with EC Directives will vary depending on the configuration, wiring, and other conditions of
the equipment or control panel on which the OMRON devices are installed.
The customer must, therefore, perform the final check to confirm that devices
and the overall machine conform to EMC standards.
xxiii
Unit Versions of CS/CJ-series FL-net Units7
NoteApplicable EMS (Electromagnetic Susceptibility) and EMI (Electromagnetic
Interference) Standards in the EMC (Electromagnetic Compatibility) standards are as follows:
Unit/BoardEMSEMI
CS1W-FLN22
EN61000-6-2
EN61000-6-4
CJ1W-FLN22
Common Emission Standard EN61000-6-4, radiated emission standard
(10 m)
Low Voltage Directive
Always ensure that devices operating at voltages of 50 to 1,000 V AC and 75
to 1,500 V DC meet the required safety standards for the PLC (EN61131-2).
7Unit Versions of CS/CJ-series FL-net Units
Unit Versions
A “unit version” has been introduced to manage CS/CJ-series FL-net Units
according to differences in functionality accompanying upgrades.
1. Unit Version Notation on Products
The unit version code is provided on the nameplate of the CS-series FL-net
Units for which unit versions are being managed, as shown below. This system applies to FL-net Units with unit version 1.0 or later.
Example: CS1W-FLN22 CS-series
FL-net Unit
Nameplate
CS1W-FLN22
FL-net UNIT
Unit version 1.0
2. Confirming Unit Versions with Support Software
CX-Programmer version 5.0 can be used to confirm the unit version in the
Unit Manufacturing Information.
1. In the I/O Table Window, right-click on the FL-net Unit, and then select Unit
Manufacturing Information.
2. The following Unit Manufacturing Information Dialog Box will be displayed.
Lot No. 040301 0000 Ver.1.0
OMRON Corporation
MADE IN JAPAN
xxiv
Unit Versions of CS/CJ-series FL-net Units7
The unit version is displayed.
Example: In this Unit Manufacturing Information Dialog Box, unit version 1.0 is
displayed. Use this dialog box to confirm the unit version of the FL-net Unit
that is connected online.
3. Using the Unit Version Labels
Unit version labels are provided with the FL-net Unit. These labels can be
attached to the front of FL-net Units to differentiate from previous FL-net
Units.
Unit Version Notation
The unit versions are indicated in this manual as follows:
Notation in product
Ver.1.0 or later after
the lot number
nameplate
Notation in this manualRemarks
CS/CJ-series FL-net Units
with unit version 1.0 or later
Information for which no particular version is specified
applies to all unit versions.
xxv
Unit Versions of CS/CJ-series FL-net Units7
xxvi
SECTION 1
Features and System Configuration
This section introduces the overall structure of an FL-net (Ver. 2.00) network, outlines the features of the FL-net (Ver. 2.00)
Unit, describes the communications protocols used by an FL-net (Ver. 2.00) network, and provides basic precautions for
use of the network.
FL-net is an open FA network that was standardized by the Japan FA Open
Systems Promotion Group (JOP) of the Manufacturing Science and Technology Center (MSTC) under the Ministry of International Trade and Industry
(MITI). It has been established in the Japan Electrical Manufacturers standards (JEM 1479) and is becoming very popular.
FL-net enables personal computers and FA controllers, such as programmable controllers (PLCs) or computerized numeric controllers (CNCs), by different manufacturers to be interconnected, controlled, and monitored, as shown
in the following diagram.
Personal
computer
EWS
Server
Computers
WAN
Host LAN Ethernet (TCP/IP, UDP)
FL-net Ethernet-based Control Network
Personal
computer
CNC
RC
Controllers
Devices
PLC
Field Network
PLC
PLC
Sensors
Actuators
FL-net PositioningFL-net Unit specifications have been designed to conform to Japan Electrical
Manufacturers standards (JEM 1479: 2001). It cannot be connected to communications devices based on the previous standards (JEM 1479: 2000).
The most recent FL-net specifications can be downloaded from the home
page of the Japan Electrical Manufacturers Association (http://www.jemanet.or.jp/English/).
The following table shows the relationship between these standards and the
FL-net Units manufactured and sold by OMRON.
Unit nameModelApplicable standardsManufacture and sales
JEM 1479: 2000Under the guidance of the JEMA, communications
devices conforming to JEM 1479: 2000 specifications cannot be manufactured or sold after April,
2001.
CS1W-FLN01 FL-net Unit cannot be connected to a network based on CS1W-
FLN02, CS1W-FLN12, CS1W-FLN22, or CJ1W-FLN22 FL-net Units.
2. CS1W-FLN02, CS1W-FLN12, CS1W-FLN22, or CJ1W-FLN22 FL-net Units cannot
be connected to a network based on the
CS1W-FLN01 FL-net Unit.
2
FL-net OverviewSection 1-1
FL-net FeaturesFL-net System Concept
FL-net was designed to provide realtime communications between controllers
in manufacturing systems, such as programmable controllers (PLCs), robot
controllers (RCs), and computerized numeric controllers (CNCs). FL-net is
configured to broadcast tokens using the Ethernet UDP/IP protocols to enable
cyclic and message communications.
FL-net systems have the following features.
1. FL-net is an open system.
2. FL-net enables a multi-vendor network.
3. FL-net enables personal computers and FA controllers, such as programmable controllers (PLCs) or computerized numeric controllers (CNCs), by
different manufacturers to be interconnected, controlled, and monitored.
FL-net
Application layerUser application Interface
FA link protocol layerCyclic transmissionMessage service
Message
transmission
Token management
protocol
Transport layerUDP
Network layerIP
Data link layerEthernet
Physical layer
Figure 1 Basic Configuration of FL-net Protocol
(IEEE802.3 standard)
Conforms to Widely Used Standards
Efficient communications can be achieved by this system based on Ethernet,
which has become the standard particularly for OA devices, combined with
standard UDP/IP. The use of Ethernet offers the following benefits.
1. Low cost
Configurations allowing the application of widely used communications de-
vices reduces costs.
2. Compatible with existing network devices
Transceivers, hubs, cables, LAN cards for personal computers, and other
network devices widely used for Ethernet can be used.
3. Higher speeds
Baud rates are expected to improve in the future, increasing to100 Mbps,
and 1 Gbps.
4. Optical communications
By using devices such as optical repeaters, which are widely used with
Ethernet, optic fiber can be used for necessary components to enable
long-distance transmission of over 500 m, improved noise resistance, and
measures against lightning surge on outdoor wiring.
3
FL-net OverviewSection 1-1
Supports Required Functions between FA Controllers
User-defined specifications allow the following range of features that are
required for FA systems.
1. Large-scale network
Up to 254 devices (nodes) can be connected in the physical layer of the
network.
2. Dual communications functions to suit application
The Common Memory function uses cyclic transmission so that each node
can always share the same data with other nodes on the network. FL-net
also supports message communications for use when handling only essential data is required.
3. Large-capacity Common Memory
The Common Memory is provided with a large capacity of 8 Kbits and 8
Kwords.
4. High-speed response
High-speed response time of 50 ms/32 nodes (for 2 Kbits and 2 Kwords)
is provided.
The absence of a master in the FL-net network enables nodes to be added
or removed readily without affecting any other nodes. This allows any node
to be turned ON or OFF easily and facilitates maintenance.
General Differences between Ethernet and FL-net
1. FL-net is a network designed for FA environments and is not compatible
with all general-purpose Ethernet devices. Some devices are not suitable
due to noise resistance and environment resistance requirements.
2. Only FL-net-compatible controllers and control devices can be connected
to FL-net to meet the demands of control applications requiring responsiveness in realtime communications.
3. FL-net is a cyclic communications method using the broadcasting supported by UDP/IP protocols based on the 10Base-5 and 10Base-T standards.
The following restrictions currently apply.
• Compatible devices mainly use 10 Mbps Ethernet LAN.
• Connection to other general-purpose Ethernet systems is not supported.
• TCP/IP are not supported.
• Switching hubs cannot be used effectively.
• Routers and similar devices may not be compatible.
FL-net FAQ
QuestionAnswer
1What is Ethernet?Ethernet is a standard defining a type of cable. It is used in a local area network (LAN). An
Ethernet network transmits data between computers at a baud rate of between 10 Mbps and
100 Mbps. Currently, the most commonly used Ethernet in offices and other OA systems is
twisted-pair cable (UTP) that uses 10 Mbps. Ethernet communications are possible using
software protocols provided by many vendors.
2What is FL-net?The FL-net is a network to which programmable controllers (PLCs), computerized numeric
controllers (CNCs), and other FA controllers are connected, and on which control data is
exchanged between controllers at high speed. FL-net uses the same cables that are used for
Ethernet.
4
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