Executing CMND490 Improved TCP Socket Interface | Omron CS1W-ETN21

Overview of Communications Functions

Section 1-5

Executing CMND(490)

Improved TCP Socket Interface

A total of eight ports (UDP and TCP combined) can be used for socket ser- vices.

UNIX computer, etc. (node with socket services interface)

Ethernet

Ethernet Unit

TCP/UDP

protocol

CS/CJ-series

CPU Unit

IP	TCPUDP	Socket	Service request switch
TCP/UDP			Parameters
protocol

Ethernet Unit CS/CJ-series

CPU Unit

Another way to use socket services is to request a UDP or TCP socket ser- vice by sending a FINS command to the Ethernet Unit by executing CMND(490) from the CPU Unit. When the Ethernet Unit receives the socket service request, it returns a response to the CPU Unit to confirm that it received the request, and then begins the requested processing. When the processing is completed, the results are stored in the Results Storage Area in the CPU Unit.

Eight TCP ports and eight UDP ports can be used.

The TCP socket interface has been improved. The size of received data accu- mulated in the reception buffer is now stored, and a Data Received Flag has been added, enabling the TCP socket's receive program to be executed after the required data has been accumulated in the Ethernet Unit's reception buffer. The keep-alive setting has also been enabled for TCP socket services.

UNIX computer, etc. (node with socket services interface)

				Ethernet




			TCP/UDP			Ethernet Unit
			protocol

CS/CJ-series

CPU Unit

				FINS
		UDPTCP		commands	CMND
			Socket		CMND
TCP protocol	IP		Socket	FINS	Results Storage
				responses	Results Storage
					Area
UDP protocol				Processing
				results
	Socket interface

Ethernet Unit CS/CJ-series

CPU Unit

19

Image 44

Omron CS1W-ETN21 operation manual Executing CMND490 Improved TCP Socket Interface

Contents

Ethernet Units Construction of Networks Revised January Page Omron Product References  Omron Confirming Unit Versions with Support Software Unit VersionsNotation of Unit Versions on Products Unit Version Notation Lowing table Viii Table of Contents Ethernet Unit Memory Allocations Index 249 Revision History 257 Xii Section Contents About this Manual Manual Model Name Contents Number Relevant Manuals WS02-CXPC1-EV6 CXONE-AL@@C-ECQM1H-PRO01-E CQM1-PRO01-E Xvi Read and Understand this Manual Application Considerations Disclaimers Page Precautions Intended Audience General PrecautionsSafety Precautions Operating Environment Precautions Application Precautions Application Precautions Conformance to EC Directives Applicable DirectivesConcepts EMC Directives Low Voltage Directive Section Overall System Configuration Example Connecting the CX-Programmer to PLCs Online via EthernetEthernet Unit Function Guide Determining the Objectives Section Exchanging Data between Omron PLCs using Ethernet Reference Operation Receiving E-mail Data and Files at the PLC Operation Use the mail receive function Ladder program Ulating control bits or the CMND490 instruction Features Simplified Socket ServicesCompatibility and Speed Various Protocols Available on Ethernet Improved Fins Message Communications Additional E-mail Functions Automatic PLC Internal Clock Adjustment Specification of Servers by Host NameUse Web Function to Read Ethernet Unit Settings and Status Network Connection with Controller Link System Configuration System ConfigurationSetup Area and Related Peripheral Devices Devices Required for Constructing a Network Routing Table Area Specifications General SpecificationsSpecifications CS-series Ethernet Unit CJ-series Ethernet Unit Dimensions Software Configuration Fins Communications Service PLCs, mode changes, and file memory operationsOverview of Communications Functions Basic Functions Manipulating Dedicated Control Bits Socket ServicesUpgraded Functions Executing CMND490 Improved TCP Socket Interface FTP Server Function Mail Send Function Mail Receive Function Automatic Clock Adjustment Function Specifying Servers by Host Name Nomenclature and Functions Component NamesCS-series Ethernet Units CS1W-ETN21 100Base-TX 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 Unit Version Upgrade Information Upgrade DetailsUnit Version FINS/UDP Installation and Initial Setup Overview of Startup Procedure Tables Switch Settings Setting the Unit NumberSetting the Node Address Setting range Unit CJ-series Ethernet Units Mounting to a CJ-series PLC Mounting to a PLCMounting to a CS-series PLC Network Installation Basic Installation Precautions Precautions Precautions on Laying Twisted-pair CableBasic Precautions Recommended Products Connect the hubs using special cables or special racks Cascade ConnectionsStack Connections Hubs per stack Using Contact Outputs Common to All Units Mounting LocationCable Location Hub Measures Connecting to the Network Ethernet ConnectorsConnecting the Cable Connector pin Signal name Abbr Signal direction Connecting Programming Devices to the PLC Creating I/O Tables1 I/O Table Overview Devices Procedure for Creating I/O Tables Connecting Programming Devices Programming ConsoleCX-Programmer Version 3.20 or Higher and CX-Integrator Model number Key Sheet required Recommended cable required Unit Setup Procedure Section Using the Web Browser Setting Function 3.. . Connect to the Ethernet Unit from the Web browser Section Basic Settings IP Address Default Setting Unit SetupOperation status +98 +99 Broadcast Settings Setting ContentsSubnet Mask Class Subnet mask TCP/IP Keep-alive Setting SettingsBaud Rate Set the baud rate Unit Setup for Particular Applications Socket ServicesCX-Programmer tab Settings CX-Programmer tab Setting Setup Keep-alive Automatic Clock Adjustment Mail ReceptionSmtp POP Ping Command CX-Programmer Setting item TabCommunications Test Ethernet Unit Converting from Previous Models Host ComputerMethod Application Examples Specifications in ETN11 mode Checking the CPU Bus Unit System Setup Area Format Changing the CPU Bus Unit System Setup Area Format Bit address Format classification Using the CX-Programmers Unit Setup If an Error Occurred in the Mode Change Node address IndicatorsNot lit Not lit Lit Converting from ETN21 Mode to ETN11 Mode Section CX-Programmer Unit Setup Setup Contents Default Confidential FINS/TCP Connection Setup FINS/TCP Following settings can be made for each connection number Tion of Applications DNS Server Setup DNS Smtp Server Setup Smtp POP Server Setup POP Destination Mail Address Setup Mail Address Send Mail ETN CPU Posting Mail Address Protection Setting Receive Mail Receive Attached File Setting Receive Command Setting Auto Adjust Time Sntp Server Setup Http Http Server SetupFor details, refer to Automatic Clock Adjustment Function Section Ethernet Unit Memory Allocations CIO Area Allocations Socket Force-close Switch Bit Mail Send Switch BitAutomatic Clock Adjustment Switch Bit Unit Control Bits CPU Unit to Ethernet Unit Bit Flag Status Manipulated Unit operation Reference Status of UDP/TCP Sockets 1 to 8 Ethernet Unit to CPU UnitOpening Flag Bit Results Storage Error Flag Bit Receiving Flag BitSending Flag Bit Closing Flag Bit Service Status Ethernet Unit to CPU Unit Accessing Memory Sending Mail BitFTP Status Bit Bit Name Status Manipulated Unit operation Reference Accessing Memory Receiving Mail Bit System Setup Format Bits 8 toError Status Ethernet Unit To CPU Unit Sntp server error Unit Bit Switch Status Manipulated Unit operation Reference FINS/TCP Connection Status DM Area Allocations These bits show the status of FINS/TCP connections 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 IP Address Display/Setting Area Application Setting device Setting area Remarks Words Bits Name Function Settings Auxiliary Area DataArea of PLC memory that are related to the Ethernet Unit Read-only Bits/Words Read/Write Bits User Settings Bits Name Description Settings Section Determining IP Addresses IP Address Configuration IP AddressesAllocating IP Addresses Class Number of networks Number of hosts Class Subnet Mask value Ethernet Unit IP Address SettingsSubnet Masks Specifying Nodes in Fins Communications Services IP Addresses in Fins CommunicationsAllocating Addresses to Ethernet Units Ethernet Unit Fins Message Reception Automatic Generation Method Dynamic/Static IP Address Table Method and Combined MethodRemote Fins node Remote IP address Connection Remote port Example Number Example Pairing Addresses in Internal Tables FINS/UDP Communications MethodsAutomatic Generation Dynamic Automatic Generation Static Example Combined Method Prohibiting Dynamically Changing Remote IP Addresses Using the ETN11- compatible Mode Pairing in the FINS/TCP Method FINS/TCP Communications MethodInternal Processing Local Device Is FINS/TCP Client Local Device Is a Client Setting FINS/TCP ConnectionsLocal Device Is Server Automatic IP Address Setting by Dhcp Service Application ExamplesResponding to Computers with Changed IP Addresses FINS/UDP Communications Method Related Products and Communications/Setting Methods Models Supporting Automatic Generation Method Dynamic 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 Automatic Clock Adjustment Transferring FilesSending Mail Receiving Mail Ethernet Unit with a Global Address Considerations, on using POP before Smtp UDP/TCP port number default 53 to be used for DNS cannot beMail via the intranet, even if it as a private address PLC can receive the Ethernet Units IP address from the POP3 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 Procedure for Using FINS/UDP UDP Port Numbers for FINS/TCP Features FINS/TCP Method TCP Port Number for FINS/TCP Connection Numbers Procedure FINS/TCP Connection Status Word n+23Communications Internal table FINS/TCP Tab Procedure for Using FINS/TCPSetup Tab Creating Routing Tables Routing Table OverviewLocal Network Table Relay Network Table Connecting and Using a Peripheral Device for the PLC Routing Table Setting Examples Example 2 Three Interconnected Networks Example 3 All Nodes Using Fins Applications System Configuration Example 1 No RoutingSettings for target PLC PLC1s Change PLC Dialog Box CX-Programmer CX-Server CX-Programmers Unit Setup Setup Tab 128 System Configuration Example 2 Using Routing Tables Routing Table Settings and Transfer to Each PLCSettings for target PLC PLC3s Change PLC Dialog Box PLC3 Overview of Setup Methods Starting FinsGateway Settings Etnunit Driver SetupFinsGateway Local Network Table Network Tab Communication Unit Tab 132 133 Starting FinsGateway Etnunit Service Conditions Communications Specifications CX-Programmers Unit SetupNot set. All defaults are used Communicating between Omron PLCs PLC Communications Data Areas Area Range Ning word D at the remote destination node node address N Using SEND090, RECV098, and CMND490SEND090 RECV098 CMND490 Hex 2 s Destination node number N To FE Hex Commands Addressed to CS/CJ-series CPU Units Usage Command Name Function Code Writing Programs Flag name Address Contents Word Bits Communications Port Error Flag and Completion Codes CMND490 Word ContentsCommunications Port Completion Codes Timing of Communications Flag Changes 144 Program Example 146 Transmission Delays CPU Bus Unit Service Cycle Local NodeCPU execution mode Processing time considerations SEND090 CPU Bus Unit Service Processing Time Local Node Transmission DelayCPU Bus Unit Service Cycle Remote Node Transmission Processing Time CPU Bus Unit Service Processing Time Remote Node CPU processing mode Processing time considerations SettingsExample Calculations Calculation Equation illustrated in the following diagram RECV098 Transmission processing time command Transmission Delay CommandReception processing time command Response 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 Codes and Response Codes Command Code ListResponse Code List Command code Name Socket Applications Format CIO ParametersCommunications Type Command/Response Reference Reset Broadcast Address Setting IP Address Conversion Method SettingFINS/UDP Port Number Setting Controller Data Read Controller Status Read Error Flags Response IP Address ErrorIP Address Table Error IP Router Table Error Runs the echo test between specified nodes Eeprom ErrorInternode Echo Test Command Block Response Block Parameters Test Data Command, ResponseBroadcast Test Results Read Broadcast Data Send Error LOG Read Test Data CommandReads the error log Bytes can be specified Error LOG Clear Error Log Data ResponseError Code, Detailed Information Minute, Second, Day, Hour, Year, Month Requests processing to open a socket UDP Open RequestResults Storage Format UDP Socket Number Command Results Storage Area Command UDP Receive RequestRequests that data be sent from a UDP socket Enobufs Requests that data be received by a UDP socket UDP Send RequestResults Storage Area Response Codes 170 UDP Close Request Requests processing to close a socket Passive TCP Open Request Response code Description 0000 Normal Remote IP address Remote TCP port Description Econnreset Active TCP Open RequestEconnaborted Tunreach 175 Eacces Drnotavail TCP Receive Request Requests that data be sent from a TCP socket 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 FIFINS/TCP Connection No. Command Response FINS/TCP Connection Status Read2232 Reads the FINS/TCP connection status Number of Records Command IP Address Table WriteRemote TCP Port Number Response TCP Transitions Response Writes the IP address table Precautions Response Codes IP Address Table Records CommandIP Address Write Fins Node Address IP Address Table Read Reads the IP address table IP Router Table Read Reads the IP router table IP Network Address Router IP Address Protocol Status Read Reads the Ethernet Unit protocol statusIP Status Response Value Type number Description Connection Information 60 Bytes Send Information 40 Bytes Receive Information Memory Status Read Memory Status Response Socket Status Read Address Information Read TCP Transitions 4 bytesReads Fins node addresses and IP addresses Number of Addresses Response IP Address Read Node address set on the Ethernet Unit hexadecimalIP address set on the Ethernet Unit hexadecimal Fins Node Address Response Subnet Mask Response Troubleshooting Troubleshooting with Indicators Probably cause Correction Error Status Word = CIO 1500 + 25 x unit number +18 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 Troubleshooting Procedures Startup Problems Fins Communications Problems SEND090/RECV098/ CMND490 Is the control data For the instruction set Incorrectly? UDP Socket Problems General ProblemsProblems Opening and Closing Reception Problems Read Controller Status Transmission Problems Is send Y processing not Finishing? TCP Socket Problems General Problems Refer to General Problems on Opening ProblemsClosing Problems 216 FTP Service Problems Connection Problems File Transfer Problems END Network Connection Problems Status Read Mail Not being Sent A R T Mail Not being Received A R T Clock Not being Automatically Adjusted Flashing? Status bit ON? Troubleshooting with Response Codes Main code Sub-code Check point Probable cause RemedyController Status Read 224 225 226 Network Relay Errors Results Storage Area Response CodesCodes stored in the Results Storage Area Devices Eisconn EnotconnEalready Emsgsize Response Unix error Description Probable remedy Code 230 Ethernet Network Parameters Parameter Value DescriptionPage Buffer Configuration Appendix B Network Memory TCP Status Transitions Status MeaningPage Ascii Characters SpacePage Maintenance Settings after Replacing an Ethernet UnitSettings after Replacing a CPU Replacing an Ethernet UnitPage Tools Required for Inspection InspectionsItems Page Web Function List Unit Setup FunctionsEthernet Unit Web Function Appendix G POP Web Function Password Using the Web Function Setting PasswordStatus Monitor Menu item Corresponding CX-Programmer function Appendix G 247 248 Numerics Index 251 252 253 254 255 256 Revision History Cat. No. W420-E1-04 Revision code Revision History Omron Corporation Control Devices Division H.Q Regional Headquarters Authorized Distributor