Manuals / Omron / Computer Equipment / Network Card

Omron CJ1W-ETN21 operation manual TCP Status Transitions, Status Meaning

Models: CJ1W-ETN21

1 242

Download 242 pages 30.9 Kb

Page 223

Appendix C

TCP Status Transitions

The TCP socket status can be confirmed using the socket status data returned for the FINS command SOCKET STATUS READ (2764).

	CLOSED		ACTIVE OPEN

			snd SYN
	Passive OPEN		CLOSE

	LISTEN		CLOSE

	rcv SYN
			SEND
	snd SYN,ACK
			snd SYN

SYN	rcv SYN		SYN
RECEIVED	snd ACK		SENT

	rcv ACK of SYN		rcv SYN,ACK
			snd ACK
CLOSE	ESTABLISHED
snd FIN
	CLOSE		rcv FIN
	snd FIN		snd ACK
FIN			CLOSED
			WAIT
WAIT-1

	rcv FIN		CLOSE

rcv ACK of FIN	snd ACK
			snd FIN

FIN WAIT-2	CLOSING
			LAST-ACK
rcv FIN	rcv ACK of FIN		rcv ACK of FIN



snd ACK			Timeout=2MSL


	TIME WAIT		CLOSED

Status	Meaning

CLOSED	Connection closed.

LISTEN	Waiting for connection.

SYN SENT	SYN sent in active status.

SYN RECEIVED	SYN received and sent.

ESTABLISHED	Already established.

CLOSE WAIT	FIN received and waiting for completion.

FIN WAIT 1	Completed and FIN sent.

CLOSING	Completed and exchanged FIN. Awaiting ACK.

LAST ACK	FIN sent and completed. Awaiting ACK.

FIN WAIT 2	Completed and ACK received. Awaiting FIN.

TIME WAIT	After closing, pauses twice the maximum segment life
	(2MSL).

199

Image 223

Omron CJ1W-ETN21 operation manual TCP Status Transitions, Status Meaning

Contents

Ethernet Units Construction of Applications Revised November  Omron Omron Product ReferencesPage Table of Contents FTP Server Index 207 Revision History 215 Table of Contents Section Contents Information on setting communications using CX-ProgrammerInformation on how to manage and use IP addresses CommandsRelevant Manuals Manual Model Name Contents NumberXiii Xiv Read and Understand this Manual Application Considerations Disclaimers Xviii Notation of Unit Versions on Products Unit VersionsConfirming Unit Versions with Support Software Lowing table Unit Version NotationPrecautions Safety Precautions General PrecautionsIntended Audience Safety Precautions Application Precautions Operating Environment PrecautionsApplication Precautions EMC Directives Conformance to EC DirectivesApplicable Directives ConceptsSection Acquired for the Ethernet Unit Ethernet Unit Communications ServicesService Main functions Counterpart device Reference Functions Listed by PurposeSection Communications Protocol used Situation when used ReferenceUnit setting tag Table of ProtocolsContents Default Common Protocol SettingsSmtp 2 POP 3 DNS Section Section Mail Send Function Description Mail Send Function OverviewIntroduction AdvantagesComparison with the Earlier Mail Send Function Mail Send Function DetailsMail Send Functions Compatibility with Earlier Models Contents of E-mail Body Trigger condition Text entered as subject Following header information is includedOptional Information Words value has changed Channel data has changed from XX toEthernet Unit Information Ethernet Unit information is always included in the e-mailMemory Data 6,000 Words Max Error Log Information Status InformationExtension Content Attached File DetailsFile Data 1 MB Max Summary of E-mail Body Information and Attached FilesData sent Body/Attached file Mail body Function Specifications Mail Send Function SpecificationsSpecifications Classification Trigger type Using the Mail Send FunctionProcedure Details of the Available Mail TriggersUnit Setup Settings Required for the Mail Send FunctionTransferring the settings data Setting Setting requirement ReferenceUsing the Mail Send Function Mail Address Set up to 2 destination mail addressesSend Mail Data Sent in an Attached File Send Mail Condition SettingsMail Address Specification Required Data Sent by Mail When Required Data Sent in E-mail BodyAttached File Name Send Mail Trigger Type Setting RequiredSend Mail Status Mail Send Function StatusSend Mail Status Mail Send Switch Bit 03 of n Mail Send Switch, Accessing Memory/Sending Mail FlagBit numbers Status TXT Format Accessing Memory/Sending Mail Flag Bit 01 of n+17Memory Data Formats IOM FormatCSV Format Attached File Transfer TimesAccess Times for CS1-H and CJ1-H CPU Units Mail Send Function ErrorsIdentifying and Correcting Mail Send Function Errors Access Times for CS1 and CJ1 CPU UnitsProbable cause Correction Troubleshooting Mail Send Errors with LED IndicatorsError Log Error Codes for the Mail Send Function Error Meaning Detailed error code CorrectionExample Application Make the Unit Setup Settings from the CX-ProgrammerInitial Settings Example Initial Server SettingsSend Condition Setting Destination Mail Address SetupSend when there is a Change in the CPU Units Status Transfer the CPU Bus Unit Setup SettingsAutomatic Transmission when Send Condition is Satisfied Example Send e-mail when W300 bit 00 goes from OFF to onReceive Mail Function Description Configuration of the MailMail Receive Function Overview AdvantagesAttached File Data Table of Remote Mail CommandsCommand Parameters Command Execution ResultsSpecification Mail Receive Function SpecificationsReceived E-mail Response E-mail Using the Mail Receive Function Tion Settings Required for the Mail Receive FunctionReceive Mail Tab Posting Mail Address Protection SettingReceive Command Setting Receive Attached File SettingResponse Format Remote Mail Command DetailsCommand Format FormatMounted in the CPU Unit Command FormatFileWrite File Write FunctionFileRead File Read Card mounted in the CPU Unit FileDelete File DeleteEM file memory or a Memory Card mounted in the CPU Unit FileList File List ReadResponse Format Details Command Format Details UMBackup User Memory BackupMemory or a Memory Card mounted in the CPU Unit Or a Memory Card mounted in the CPU Unit PARAMBackup Parameter Area BackupUnits I/O memory. The data is written in word units IOMWrite I/O Memory WriteSubject Body Units IOMRead I/O Memory ReadReIOMRead Changes the CPU Units operating mode ChangeMode Operating Mode ChangeBus Unit or Special I/O Unit ErrorLogRead Error Log ReadErrorLogClear Error Log Clear MailLogRead Mail Log Read Since power was turned on or the mail log was clearedNet Unit MailLogClear Mail Log ClearTest Mail Test Response List FinsSend Fins Command SendResponse Response Status Description Code IOM Format Accessing Memory/Receiving Mail FlagAccessing Memory/ Receiving Mail Flag Bit 02 of n+17 Mail Receive Function StatusCSV Format TXT FormatAccess Times for CS1-H CJ1-H CPU Units Access Times for CS1 CJ1 CPU UnitsIdentifying and Correcting Mail Receive Function Errors Mail Receive Function ErrorsTroubleshooting Mail Receive Errors with LED Indicators Hex 1st byte 2nd byte Error code Meaning Detailed error code CorrectionInitial Settings for the Mail Receive Function DNS Server IP Address Setting DNS Tab, When RequiredItem name Example Reading Data from a CPU Unit Data Area Send Remote Mail CommandsBacking Up the CPU Units User Program Memory Card FTP Server Overview SpecificationsFTP Server Function Details Connecting to the FTP ServerFile Types FTP File Transfer Mode Using the FTP Server FunctionSetting Details Default value List of Settings Required for the FTP Server FunctionSetup Tab CX-Programmer Settings Setting conditions TabConfidential FTP Server Application ExampleOpen Using FTP CommandsTable of Commands Using the CommandsDir UserRename Cdup MkdirRmdir PwdPut TypeGet MgetBye DeleteMdelete CloseError Messages Error Messages and FTP StatusMessage Meaning FTP Status Flag FTP IndicatorFTP indicator Meaning Checking FTP StatusDirectories Using File MemoryFile Memory File NamesFile Names Handled by CPU Unit File type File name Extension Contents DescriptionUnit Data format Use of CRs and CR position Initializing File Memory4 I/O Memory Data Format Memory Initialization methodSection 9ABC File system Memory Card EM File Memory FTP File Transfer TimeCS1 CPU Units/CJ1 CPU Units CS1-H CPU Units/CJ1-H CPU UnitsUnix Application Example Enter the login nameWrite the file PLAN.IOM to the Memory Card Change to the Memcard directoryChange data type to binary Transfer the file RESULT.IOM to the workstationSection Automatic Clock Adjustment Function CPU Unit Conditions OverviewUsing the Automatic Clock Adjustment Function Settings Setting conditions Reference Settings Required for Automatic Clock Adjustment FunctionAuto Adjust Time Automatic Clock Adjustment Switch Bit 04 of n Automatic Clock Adjustment SwitchAutomatic Clock Adjustment Error Processing Automatic Clock Adjustment Sntp ErrorsAutomatic Clock Adjustment Error Processing CPU Unit error Socket Services Page Socket Port Numbers Using Sockets with the Ethernet UnitOverview of Socket Communications from Ethernet Units What are Sockets?TCP Communications Protocol OverviewDifferences between TCP and UDP Opening TCP SocketsPassive Open and Active Open TCP Communications ProcedureFragmentation of Send Data Socket Service Functions Protocol Socket Service Request CMND490 Using Socket Services with Socket Service Request SwitchesProtocol Socket service request Using Socket Services with CMND490Specific Socket Service Functions Command code NameExecuting CMND490 Socket Service Function GuideDifferences with Previous Models Manipulating Dedicated Control BitsManipulating Dedicated Control Bits Using Socket Service FunctionsSettings Required for Socket Service Function CX-Programmer Setting Setting requirements Unit Setup TabDetails Default value Setup109 CIO Area Allocations Socket Service StatusUDP/TCP Socket Status Ethernet Unit to CPU Unit DM Area Allocations Bit Switch Status Manipulated Unit operationNumber Status Meaning Application ProcedureProcedure TCP Connection Status Ethernet Unit to CPU UnitPrecautions Socket Services and Socket StatusProgram Flow Error EvaluationSocket Service Parameters TCP Socket Services Parameter SettingsUse of the parameters by the socket service UDP Socket ServicesLocal UDP/TCP Port No ParametersSocket Option UDP/TCP Socket NoNumber of Bytes to Send/Receive Following specifications can be usedRemote UDP/TCP Port No Time Out TimeFollowing diagram Socket Service Request SwitchesResponse Meaning Code Response CodesUDP Socket Open Request UDP Socket Receive RequestUDP Socket Close Request UDP Socket Send RequestTCP Socket Active Open Request TCP Socket Passive Open RequestDrinuse TCP Socket Receive RequestTCP Socket Send Request Processes Timing ChartsTCP Socket Close Request Closing during OtherForce-close Switch Close Request SwitchBasic Operations System Configuration8 TCP/IP Communications Programming Example Data FlowDM Area Program Memory MapCIO Area TCP Passive Open Programming Example130 9 UDP/IP Communications Programming Example Programming example uses the following system configurationCIO 000000 is turned on to request opening a UDP socket from Tion on errors133 134 135 Using Socket Service Using Socket Services with CMND490137 Results Storage Area Basic Fins Command FormatCommand Code Socket NumberResponse Codes in the Results Storage Areas Response Codes in the Command ResponseCommunications Timing Chart Socket Service Timing Chart140 Close Request during Receive Request System ConfigurationBasic Operations Data FlowAre structured Program Memory Maps144 145 146 147 148 149 150 151 152 153 154 TCP Socket Service Precautions in Using Socket ServicesUDP and TCP Socket Services UDP Socket ServicePrecautions in Using Socket Service Request Switches TCP Socket Services Using CMND490 CS/CJ CPU Units Maximum Transmission Delays Ignoring other Network DelaysCS-H/CJ-H CPU Units Calculation Using Fins Communications to Create Host Applications Communications On an Ethernet Network Overview of Fins CommunicationsFins Communications Service Specifications for Ethernet Using the FINS/UDP and FINS/TCP MethodsFins Header Information Fins Command Frame FormatFins Frames Fins Response Frame FormatFINS/UDP Method FINS/UDP FeaturesFINS/UDP FINS/UDP Frame Format UDP Port Numbers forProcedure for Using Designating Remote Addresses Sending Commands from a Host ComputerCommunications Parameters Used by Host Computer Operation Overview By sending a Fins command Memory Area READ, command codeMand, the command will be resent FINS/UDP Sample Program15 * FINS/UDP Communications Sample Program Sample Program169 170 FINS/TCP Method FINS/TCP FeaturesTCP Port Number for FINS/TCP Frame FormatFINS/TCP Connection Numbers FINS/TCP Connection Status Word n+23 CommunicationsAge them in an internal table Automatic Allocation Fins Node Addresses Automatic Allocation Procedure175 FINS/TCP Tab Setup TabFINS/TCP Headers FINS/TCP Mode SpecificationsFins Node Address Data Send Client to Server Command Fins Node Address Data Send Server to Client CommandFollowing table shows the list of error codes Fins Frame Send CommandError code Details Hexadecimal Command Fins Frame Send Error Notification CommandNormal Operation Connection SequenceACK FIN Error Connection Sequence182 183 Host computer Remote node From onwards, the connection is established againFINS/TCP Sample Program 186 187 188 189 190 191 Receive Processing Command CPU Bus Unit Service Cycle Maximum Transmission Delays Writing/Reading to CPU UnitWrite Command Delay Time Transmission DelayResponse Read Command Delay TimeTransmission Processing 704 ms194 Parameter Value Description Ethernet Network ParametersAppendix a Appendix B Buffer ConfigurationNetwork Memory Status Meaning TCP Status TransitionsAppendix C Space Ascii CharactersAppendix D Replacing an Ethernet Unit MaintenanceSettings after Replacing an Ethernet Unit Settings After Replacing a CPUAppendix E Items InspectionsTools Required for Inspection Appendix F Numerics Index 209 210 211 212 213 214 Revision History Revision code Date Revised contentRevision History Regional Headquarters Omron Corporation Control Devices Division H.QAuthorized Distributor