Notice:OMRON products are manufactured for use according to proper procedures by a qualified operatorand only for the purposes described in this manual.The following conventions are used to indicate and classify precautions in this manual.Always heedthe information provided with them.Failure to heed precautions can result in injury to people or dam-age to property.DANGERIndicates an imminently hazardous situation which,if not avoided,will result in death orserious injury.WARNINGIndicates a potentially hazardous situation which,if not avoided,could result in death orserious injury.△CautionIndicates a potentially hazardous situation which,if not avoided,may result in minor ormoderate injury,or property damage.OMRON Product ReferencesAll OMRON products are capitalized in this manual.The word "Unit"is also capitalized when it refers toan 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."PC"is used,however,in some Program-ming Device displays to mean Programmable Controller.Visual AidsThe following headings appear in the left column of the manual to help you locate different types ofinformation.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.©OMRON,2003All rights reserved.No part of this publication may be reproduced,stored in a retrieval system,or transmitted,in any form,orby any means,mechanical,electronic,photocopying,recording,or otherwise,without the prior written permission ofOMRON.No patent liability is assumed with respect to the use of the information contained herein.Moreover,because OMRON is con-stantly striving to improve its high-quality products,the information contained in this manual is subject to change withoutnotice.Every precaution has been taken in the preparation of this manual.Nevertheless,OMRON assumes no responsibilityfor errors or omissions.Neither is any liability assumed for damages resulting from the use of the information contained inthis publication.TABLE OF CONTENTSXV124Operating Environment Precautions...........................................5Application Precautions.....................................................6Conformance to EC Directives...............................................XXSECTION 111-1Ether Unit Communications Services........................................2231-4 Common Protocol Settings..................................................4SECTION 292-1 Mail Send Function Overview................................................102-2 Mail Send Function Details..................................................112-3 Mail Send Function Specifications............................................172-4 Using the Mail Send Function................................182-5 Mail Send Function Status...……242-6I/O Memory Data Formats.……26272-8 Mail Send Function Errors...................................................282-9 Example Application..……30SECTION 3333-1 Mail Receive Function Overview ............................................343-2 Mail Receive Function Specifications..........................................363-3 Using the Mail Receive Function.............................................383-4 Remote Mail Command Details..............................................423-5 Mail Receive Function Status..............................603-6 I/O Memory Data Formats.................................。..........603-7 Attached File Transfer Times ...............623-8 Mail Receive Function Errors................................................6365TABLE OF CONTENTSSECTION 4..........6768694-3 Using the FTP Server Function...............................................704-4 FTP Server Application Example.............................................724-5 Using FTP Commands.……734-6 Checking FTP Status.......................................794-7 Using File Memory .......................................................808586SECTION 5Automatic Clock Adjustment Function ...............89905-2 Using the Automatic Clock Adjustment Function................................915-3 Automatic Clock Adjustment Switch..........................................945-4 Automatic Clock Adjustment Error Processing..................................94SECTION 6976-1 Overview of Socket Communications from Ether Units.........................991001036-4 Socket Service Function Guide...............................................1066-5 Using Socket Service Functions.........................................1071106-7 Using Socket Services by Manipulating Dedicated Control Bits.....................1126-8Using Socket Services with CMND(490).......................................1366-9Precautions in Using Socket Services..........................................155SECTION 7Using FINS Communications to Create Host Applications1597-1 Overview of FINS Communications...........................................1607-2 FINS Frames.……1627-3FNS/UDP Method..…1637-4 FINS/TCP Method.........................................1717-5 Maximum Transmission Delays:Writing/Reading to CPU Unit.....................191TABLE OF CONTENTSAppendicesA Ether Network Parameters................................................195197199D ASCII Characters.201E Maintenance ............................................................203205207Revision History ............................215ixTABLE OF CONTENTSXAbout this Manual:This manual describes the operation of the CS1W-ETN21 and CJ1W-ETN21 Ethemet Units(100Base-TX)for constructing applications and includes the sections described below.Please read this manual carefully and be sure you understand the information provided beforeattempting to install or operate the Ether Unit.Be sure to read the precautions provided in the fol-lowing section.PrecautionsSection 1 introduces the Ethemet Unit's munications services,including information on functionsand protocolsSection 2 describes how to use the Ethemet Unit's Mail Send Function,including specifications,sta-tus details,application examples,and troubleshooting infommation.Section 3 describes how to use the Ether Unit's Mail Receive Function,including specifications,status details,1/O memory data formats,file transfer timing,application examples,and troubleshootinginformationSection 4 describes the functions provided by the FTP server.Section 5 provides an overview of the automatic clock adjustment function,including details on speci-fications,required settings,operations from CX-Programmer,and troubleshooting.Section 6 describes the functionality provided by the Ethemet Unit via the socket services.Section 7 provides information on municating on Ethemet Systems and interconnected worksusing FINS mands.The information provided in the section deals only with FINS municationsin reference to Ethemet Units.Appendices provide infomation on Ether work parameters,the buffer configuration,TCP statustransitions,ASCll characters,maintenance,and inspections.The related Operation Manual Construction of Networks(W420)provides the following information.SectionContentsSection 1Overview of Ether Unit features,specifications,and description of the Unit parts and system configura-tion for constructing Networks.Section 2Information on Ether Unit's installation and initial settings required for operation.Section3Information on setting munications using CX-Programmer.Section 4Information on words allocated in the ClO Area and DM Area for Ether Units.Section 5Information on how to manage and use IP addresses.Section 6Information on municating on Ether Systems and interconnected works using FINSmands.Section 7Information on the FINS mands that can be sent to an Ether Unit and the responses thatare returned by the Ether Unit.Section 8Information on troubleshooting.xiRelevant ManualsThe following table lists CS-and CJ-series manuals that contain information relevant to Ether Units.ManualModelNameContentsnumberW420CS1W-ETN21Ether Units Oper-Provides information on operating and installingCJ1W-ETN21ation Manual100Base-TX Ether Units,including details on basicConstruction of Net-settings and FINS munications.worksRefer to the Communications Commands ReferenceManual(W342)for details on FINS mands that canbe sent to CS-series and CJ-series CPU Units whenusing the FINS munications service.W421CS1W-ETN21Ether Units Oper-Provides information on constructing host applications forCJ1W-ETN21ation Manual100Base-TX Ether Units,including functions for send-Construction ofing/receiving mail,socket service,automatic clock adjustApplicationsment,FTP server functions,and FINS munications.(this manual)W343CS1W-ETNO1Ether Units Oper-Describes the installation and operation of the 10Base-5CS1W-ETN11ation Manualand 10Base-T Ether Units.CJ1W-ETN11W342CS1G/H-CPU☐▣HCommunicationsDescribes the C-series (Host Link)and FINS muni-Commands Refer-cations mands used when sending municationsCS1W-SCU21ence Manualmands to CS-series and CJ-series CPU Units.CS1W-SCB21/41CJ1G/H-CPU☐☐HCJ1G-CPU☐☐CJ1W-SCU41W339CS1G/H-CPU☐☐HProgrammable Con-Provides an outline of,and describes the design,installaCS1G/H-CPU-☐☐V1tion,maintenance,and other basic operations for the CS-Manualseries PLCs.Information is also included on features.system configuration,wiring,1/O memory allocations,andtroubleshooting.gramming Manual (W394).W393Programmable Con-Provides an outline of,and describes the design,installaCJ1G-CPU☐▣trollers Operationtion,maintenance,and other basic operations for the CJManualseries PLCs.Information is also included on features,system configuration,wiring,1/O memory allocations,andtroubleshooting.Use together with the Programmable Controllers Pro-gramming Manual (W394).xiiManualModelNameContentsnumberW394CS1G/H-CPU☐☐HProgrammable Con-Describes programming.tasks,file memory,and othertrollers Program-functions for the CS-series and CJ-series PLCs.CJ1G/H-CPU☐☐Hming Manualtion Manual(W339 for CS-series PLCs and W393 for CJseries PLCs).W340CS1G/H-CPU☐☐HProgrammable Con-Describes the ladder diag ram programming instructionsCS1G/H-CPU-☐☐V1trollers Instructionssupported by CS-series and CJ-series PCs.Use togetherReference Manualwith the Programmable Controllers Operation Manual(W339 for CS-series PLCs and W393 for CJ-seriesPLCs),and Programmable Controllers ProgrammingManual (W394).W414CX-ProgrammerProvides information on how to use the CX-Programmer.Ver3.☐Operationa Windows-based programming device,and CX-Net,aManualWindows-based work configuration tool.Use together with the Programmable Controllers Opera-tion Manua/(W339 for CS-series PLCs and W393 for CJ-series PLCs),Programmable Controllers ProgrammingManual (W394)and the Programmable ControllersInstructions Reference Manual (W340)to perform pro-gramming.W341CQM1H-PRO01Programming Con-Provides informationon how to operate the ProgrammingCOM1-PRO01soles OperationConsole.C200H-PRO27+ManualUse together with the Programmable Controlers Opera-CS1W-KS001tion Manual(W339 for CS-series PLCs and W393 for CJ-Manual (W394)and the Programmable ControllersInstructions Reference Manual (W340)to perform pro-gramming.W336CS1W-SCB21/41Serial Communica-Accessing the PLC connected to the CX-Programmer viaCS1W-SCU21tions Boards andEther or the host puter or other device connectedCJ1W-SCU41Serial Communica-to the Serial Communications Board or Unit.tions Units OperationDescribes the use of Serial Communications Units andManualBoards,including details on hardware,software,andstandard system protocols.WARNING Failure to read and understand the infommation provided in this manual may result in per-sonal injury or death,damage to the product,or product failure.Please read each sectionin its entirety and be sure you understand the information provided in the section andrelated sections before attempting any of the procedures or operations given.xiii