FINS/TCP Method, FINS/TCP Features | Omron CS1W-ETN21 specs

FINS/TCP Method

Section 6-3

6-3 FINS/TCP Method

6-3-1 Overview

FINS/TCP Features

The FINS/TCP method is a FINS communications method that uses the TCP/ IP protocol. TCP/IP is a connection-type communications protocol. Before a message is sent from one node to another, it is necessary to establish a vir- tual circuit, i.e., a connection. Once a connection has been established, com- munications are quite reliable. The arrival of data that is sent via the connection is confirmed by an acknowledgement (ACK) response, and retries are executed automatically as required.

The FINS/TCP method has been newly added to the CS1W-ETN21 and CJ1W-ETN21 Ethernet Units.When FINS/TCP is used, it must be determined which node is the server and which is the client.

For communications between a personal computer and a PLC, the computer should normally be set as the client and the PLC as the server. For communi- cations between two PLCs, either one can be set as the client and the other as the server.

Node

(Client)

Node

(Server)

Request to establish a connection

Connection established

Acknowledgement

Data transmission 1

Acknowledgement

An acknowledgement is received whenever a connection is established or data is sent, so transmissions are more reliable but somewhat slower.

Compared to the FINS/UDP method, the FINS/TCP method has the following characteristics.

•Data transmission is more reliable, due to factors such as retry process- ing at the TCP/IP layer. The FINS/TCP method is thus better suited to dealing with communications errors in an IP network that spans several layers.

•Remote clients can be restricted by means of settings at the server (i.e., the server can be protected from access by non-specified IP addresses).

•Broadcasting cannot be used.

•TCP/IP has various retry procedures, and this tends to lower its perfor- mance in comparison with UDP/IP.

•There is a limit to the number of connections that can be made (i.e., 16 connections maximum), and any given node can communicate only with up to 16 other nodes at a time.

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Omron CS1W-ETN21 operation manual FINS/TCP Method, FINS/TCP Features

Contents

Ethernet Units Construction of Networks Revised January Page  Omron Omron Product References Confirming Unit Versions with Support Software Unit VersionsNotation of Unit Versions on Products Lowing table Unit Version Notation Viii Table of Contents Ethernet Unit Memory Allocations Index 249 Revision History 257 Xii About this Manual Section Contents Relevant Manuals Manual Model Name Contents Number CQM1-PRO01-E WS02-CXPC1-EV6CXONE-AL@@C-E CQM1H-PRO01-E Xvi Read and Understand this Manual Application Considerations Disclaimers Page Precautions Intended Audience General PrecautionsSafety Precautions Application Precautions Operating Environment Precautions Application Precautions EMC Directives Conformance to EC DirectivesApplicable Directives Concepts Low Voltage Directive Section Determining the Objectives Overall System Configuration ExampleConnecting the CX-Programmer to PLCs Online via Ethernet Ethernet Unit Function Guide Section Reference Exchanging Data between Omron PLCs using Ethernet Operation Operation Use the mail receive function Receiving E-mail Data and Files at the PLC Ulating control bits or the CMND490 instruction Ladder program Various Protocols Available on Ethernet FeaturesSimplified Socket Services Compatibility and Speed Additional E-mail Functions Improved Fins Message Communications Network Connection with Controller Link Automatic PLC Internal Clock AdjustmentSpecification of Servers by Host Name Use Web Function to Read Ethernet Unit Settings and Status Devices Required for Constructing a Network System ConfigurationSystem Configuration Setup Area and Related Peripheral Devices Routing Table Area CS-series Ethernet Unit SpecificationsGeneral Specifications Specifications CJ-series Ethernet Unit Dimensions Software Configuration Basic Functions Fins Communications ServicePLCs, mode changes, and file memory operations Overview of Communications Functions Manipulating Dedicated Control Bits Socket ServicesUpgraded Functions Executing CMND490 Improved TCP Socket Interface Mail Send Function FTP Server Function Mail Receive Function Specifying Servers by Host Name Automatic Clock Adjustment Function CS1W-ETN21 100Base-TX Nomenclature and FunctionsComponent Names CS-series Ethernet Units Front CJ-series Ethernet UnitsCJ1W-ETN21 100Base-TX Subnet Mask IndicatorsIP Address Indicator Color Status Meaning CS1W-ETN11 CS1W-ETN21 CJ1W-ETN11 CJ1W-ETN21 Comparison with Previous ModelsPrevious models New models FINS/UDP Unit Version Upgrade InformationUpgrade Details Unit Version Installation and Initial Setup Tables Overview of Startup Procedure Setting range Switch SettingsSetting the Unit Number Setting the Node Address CJ-series Ethernet Units Unit Mounting to a CJ-series PLC Mounting to a PLCMounting to a CS-series PLC Basic Installation Precautions Network Installation Recommended Products PrecautionsPrecautions on Laying Twisted-pair Cable Basic Precautions Hubs per stack Connect the hubs using special cables or special racksCascade Connections Stack Connections Hub Measures Using Contact Outputs Common to All UnitsMounting Location Cable Location Connector pin Signal name Abbr Signal direction Connecting to the NetworkEthernet Connectors Connecting the Cable Devices Connecting Programming Devices to the PLCCreating I/O Tables 1 I/O Table Overview Model number Key Sheet required Recommended cable required Procedure for Creating I/O TablesConnecting Programming Devices Programming Console CX-Programmer Version 3.20 or Higher and CX-Integrator Unit Setup Procedure Section Using the Web Browser Setting Function 3.. . Connect to the Ethernet Unit from the Web browser Section IP Address Basic Settings +98 +99 Default SettingUnit Setup Operation status Class Subnet mask Broadcast SettingsSetting Contents Subnet Mask Set the baud rate TCP/IP Keep-alive SettingSettings Baud Rate CX-Programmer tab Setting Setup Keep-alive Unit Setup for Particular ApplicationsSocket Services CX-Programmer tab Settings POP Automatic Clock AdjustmentMail Reception Smtp Ethernet Unit Ping CommandCX-Programmer Setting item Tab Communications Test Application Examples Converting from Previous ModelsHost Computer Method Specifications in ETN11 mode Checking the CPU Bus Unit System Setup Area Format Bit address Format classification Changing the CPU Bus Unit System Setup Area Format Using the CX-Programmers Unit Setup Not lit Lit If an Error Occurred in the Mode ChangeNode address Indicators Not lit Converting from ETN21 Mode to ETN11 Mode Section CX-Programmer Unit Setup Contents Default Setup Confidential FINS/TCP FINS/TCP Connection Setup Tion of Applications Following settings can be made for each connection number DNS DNS Server Setup Smtp Smtp Server Setup POP POP Server Setup Mail Address Destination Mail Address Setup Send Mail CPU ETN Receive Mail Posting Mail Address Protection Setting Receive Command Setting Receive Attached File Setting Sntp Server Setup Auto Adjust Time Http Http Server SetupFor details, refer to Automatic Clock Adjustment Function Section Ethernet Unit Memory Allocations CIO Area Allocations Unit Control Bits CPU Unit to Ethernet Unit Socket Force-close Switch BitMail Send Switch Bit Automatic Clock Adjustment Switch Bit Bit Flag Status Manipulated Unit operation Reference Status of UDP/TCP Sockets 1 to 8 Ethernet Unit to CPU UnitOpening Flag Bit Closing Flag Bit Results Storage Error Flag BitReceiving Flag Bit Sending Flag Bit Bit Name Status Manipulated Unit operation Reference Service Status Ethernet Unit to CPU UnitAccessing Memory Sending Mail Bit FTP Status Bit To CPU Unit Accessing Memory Receiving Mail BitSystem Setup Format Bits 8 to Error Status Ethernet Unit Sntp server error Unit FINS/TCP Connection Status Bit Switch Status Manipulated Unit operation Reference These bits show the status of FINS/TCP connections DM Area Allocations Bits Status Send Mail Status 1, 2 Ethernet Unit to CPU UnitSend Mail Status +1 to m+8 Number of Bytes Received 0000 to 07C0 hex Application Setting device Setting area Remarks IP Address Display/Setting Area Read-only Bits/Words Words Bits Name Function SettingsAuxiliary Area Data Area of PLC memory that are related to the Ethernet Unit Bits Name Description Settings Read/Write Bits User Settings Section Determining IP Addresses Class Number of networks Number of hosts IP Address ConfigurationIP Addresses Allocating IP Addresses Class Subnet Mask value Ethernet Unit IP Address SettingsSubnet Masks Ethernet Unit Fins Message Reception Specifying Nodes in Fins Communications ServicesIP Addresses in Fins Communications Allocating Addresses to Ethernet Units Example Number Example Automatic Generation Method Dynamic/StaticIP Address Table Method and Combined Method Remote Fins node Remote IP address Connection Remote port Automatic Generation Static Pairing Addresses in Internal TablesFINS/UDP Communications Methods Automatic Generation Dynamic Combined Method Example Prohibiting Dynamically Changing Remote IP Addresses Using the ETN11- compatible Mode Local Device Is FINS/TCP Client Pairing in the FINS/TCP MethodFINS/TCP Communications Method Internal Processing Local Device Is a Client Setting FINS/TCP ConnectionsLocal Device Is Server FINS/UDP Communications Method Automatic IP Address Setting by Dhcp ServiceApplication Examples Responding to Computers with Changed IP Addresses Models Supporting Automatic Generation Method Dynamic Related Products and Communications/Setting Methods Models that Can Use the Combined Method Models Supporting Automatic Generation Method StaticModels Supporting IP Address Table Method FINS/UDP and FINS/TCP Private and Global AddressesPrivate and Global Addresses 108 Fins Communications Service Using a Private Address for the Ethernet UnitConditions for Using Communications Applications Receiving Mail Automatic Clock AdjustmentTransferring Files Sending Mail Ethernet Unit with a Global Address PLC can receive the Ethernet Units IP address from the POP3 Considerations, on using POP before SmtpUDP/TCP port number default 53 to be used for DNS cannot be Mail via the intranet, even if it as a private address Fins Communications Communications On an Ethernet Network Using the FINS/UDP and FINS/TCP MethodsOverview of Fins Communications Fins Communications Service Specifications for Ethernet Overview FINS/UDP FeaturesFINS/UDP Method UDP Port Numbers for Procedure for Using FINS/UDP FINS/TCP Method FINS/TCP Features FINS/TCP Connection Numbers TCP Port Number for Internal table ProcedureFINS/TCP Connection Status Word n+23 Communications FINS/TCP Tab Procedure for Using FINS/TCPSetup Tab Relay Network Table Creating Routing TablesRouting Table Overview Local Network Table Connecting and Using a Peripheral Device for the PLC Example 2 Three Interconnected Networks Routing Table Setting Examples Example 3 All Nodes CX-Programmer CX-Server Using Fins ApplicationsSystem Configuration Example 1 No Routing Settings for target PLC PLC1s Change PLC Dialog Box CX-Programmers Unit Setup Setup Tab 128 PLC3 System Configuration Example 2 Using Routing TablesRouting Table Settings and Transfer to Each PLC Settings for target PLC PLC3s Change PLC Dialog Box Local Network Table Overview of Setup Methods Starting FinsGateway SettingsEtnunit Driver Setup FinsGateway Communication Unit Tab Network Tab 132 133 Conditions Starting FinsGateway Etnunit Service Communicating between Omron PLCs Communications SpecificationsCX-Programmers Unit Setup Not set. All defaults are used Area Range PLC Communications Data Areas Ning word D at the remote destination node node address N Using SEND090, RECV098, and CMND490SEND090 RECV098 Hex 2 s Destination node number N To FE Hex CMND490 Usage Command Name Function Code Commands Addressed to CS/CJ-series CPU Units Writing Programs Flag name Address Contents Word Bits Timing of Communications Flag Changes Communications Port Error Flag and Completion Codes CMND490Word Contents Communications Port Completion Codes 144 Program Example 146 SEND090 Transmission DelaysCPU Bus Unit Service Cycle Local Node CPU execution mode Processing time considerations Transmission Processing Time CPU Bus Unit Service Processing Time Local NodeTransmission Delay CPU Bus Unit Service Cycle Remote Node Calculation CPU Bus Unit Service Processing Time Remote NodeCPU processing mode Processing time considerations Settings Example Calculations RECV098 Equation illustrated in the following diagram Response Transmission processing time commandTransmission Delay Command Reception processing time command 152 Calculations Precautions on High Traffic in Fins CommunicationsConditions for High Traffic Avoiding Errors due to High Traffic Fins Commands Addressed to Ethernet Units Command code Name Command Codes and Response CodesCommand Code List Response Code List Format Socket Applications CIO ParametersCommunications Type Reset Command/Response Reference Controller Data Read Broadcast Address SettingIP Address Conversion Method Setting FINS/UDP Port Number Setting Controller Status Read IP Router Table Error Error Flags ResponseIP Address Error IP Address Table Error Runs the echo test between specified nodes Eeprom ErrorInternode Echo Test Broadcast Data Send Command Block Response Block ParametersTest Data Command, Response Broadcast Test Results Read Bytes can be specified Error LOG ReadTest Data Command Reads the error log Minute, Second, Day, Hour, Year, Month Error LOG ClearError Log Data Response Error Code, Detailed Information Requests processing to open a socket UDP Open RequestResults Storage Format Enobufs UDP Socket Number Command Results Storage Area CommandUDP Receive Request Requests that data be sent from a UDP socket Requests that data be received by a UDP socket UDP Send RequestResults Storage Area Response Codes 170 Requests processing to close a socket UDP Close Request Response code Description 0000 Normal Passive TCP Open Request Remote IP address Remote TCP port Description Tunreach EconnresetActive TCP Open Request Econnaborted 175 Drnotavail Eacces Requests that data be sent from a TCP socket TCP Receive Request Etimedout TCP Send RequestRequests that data be received at a TCP socket Results Storage Format Parameters Ehostunreach TCP Close RequestEnetunreach Response Block Parameters Destination IP Address Command Timeout Value CommandPing Remarks Ping CommandFINS/TCP Connection Remote Node Change Request Reads the FINS/TCP connection status FIFINS/TCP Connection No. Command ResponseFINS/TCP Connection Status Read 2232 Writes the IP address table Number of Records CommandIP Address Table Write Remote TCP Port Number Response TCP Transitions Response Fins Node Address Precautions Response CodesIP Address Table Records Command IP Address Write Reads the IP address table IP Address Table Read Reads the IP router table IP Router Table Read Router IP Address IP Network Address Value Protocol Status ReadReads the Ethernet Unit protocol status IP Status Response Type number Description Connection Information 60 Bytes Receive Information Send Information 40 Bytes Memory Status Read Memory Status Response Socket Status Read Number of Addresses Response Address Information ReadTCP Transitions 4 bytes Reads Fins node addresses and IP addresses Fins Node Address Response IP Address ReadNode address set on the Ethernet Unit hexadecimal IP address set on the Ethernet Unit hexadecimal Subnet Mask Response Troubleshooting Probably cause Correction Troubleshooting with Indicators Word = CIO 1500 + 25 x unit number +18 Error Status Following errors are recorded in the error log Error LogLogged Errors Error Log Location Fins Commands for Error Logs Error Log Error CodesError Log Table 204 205 206 207 208 Startup Problems Troubleshooting Procedures Is the control data For the instruction set Incorrectly? Fins Communications Problems SEND090/RECV098/ CMND490 Opening and Closing UDP Socket ProblemsGeneral Problems Problems Read Controller Status Reception Problems Is send Y processing not Finishing? Transmission Problems General Problems TCP Socket Problems Refer to General Problems on Opening ProblemsClosing Problems 216 Connection Problems FTP Service Problems END File Transfer Problems Status Read Network Connection Problems A R T Mail Not being Sent A R T Mail Not being Received Flashing? Status bit ON? Clock Not being Automatically Adjusted Status Read Troubleshooting with Response CodesMain code Sub-code Check point Probable cause Remedy Controller 224 225 226 Devices Network Relay ErrorsResults Storage Area Response Codes Codes stored in the Results Storage Area Emsgsize EisconnEnotconn Ealready Response Unix error Description Probable remedy Code 230 Parameter Value Description Ethernet Network ParametersPage Appendix B Buffer Configuration Network Memory Status Meaning TCP Status TransitionsPage Space Ascii CharactersPage Replacing an Ethernet Unit MaintenanceSettings after Replacing an Ethernet Unit Settings after Replacing a CPUPage Tools Required for Inspection InspectionsItems Page Web Function List Unit Setup FunctionsEthernet Unit Web Function POP Appendix G Menu item Corresponding CX-Programmer function Web Function PasswordUsing the Web Function Setting Password Status Monitor Appendix G 247 248 Numerics Index 251 252 253 254 255 256 Cat. No. W420-E1-04 Revision code Revision History Revision History Regional Headquarters Omron Corporation Control Devices Division H.Q Authorized Distributor