Calculation | Omron CJ1W-ETN21 specification

Precautions in Using Socket Services

Section 6-9

Note 4: When the CPU Unit cycle time is less than 2 ms, A = 27, and when it is 2 ms or more, A = 53

Note 1. The values obtained from the above equations are guidelines for the trans- mission delay time when one socket in the Ethernet Unit is used only. The execution time required for the user program is not included.

2.The communications time for the remote nodes depends on the device be- ing used. For remote nodes that are not Ethernet Units, calculate the com- munications time according to the device's operation manual.

3.The actual operating environment can cause transmission delays larger than those calculated with the methods given here. Among the causes of longer delays are the following: traffic on the network, window sizes at net- work nodes, traffic through the Ethernet Unit (e.g., simultaneous servicing of multiple sockets and socket service communications, etc.), and the sys- tem configuration.

4.The above values are guidelines when the default (4%) for the uniform pe- ripheral servicing time in the PLC System Setup is used.

5.By increasing the value of the uniform peripheral servicing time, the maxi- mum transmission delay time for socket services can be shorter.

Example: When using TCP socket services between two PLCs (CS-H CPU Units) by executing the CMND(490) instruction to send/receive 512 bytes in both directions the guideline for the maximum transmission delay time can be calculated according to the following conditions as shown in the table below.

CPU Unit cycle time (local node) = 5 ms

CPU Unit cycle time (remote node) = 10 ms

Item	Calculation

Reception processing	5 ⋅ 2 + 512 ⋅ 0.001 + 53 = 63.512 ms ≈ 63.5 ms
time (local node)
Transmission processing	5 ⋅ 2 + 512 ⋅ 0.001 + 53 = 63.512 ms ≈ 63.5 ms
time (local node)
Transmission processing	10 ⋅ 2 + 512 ⋅ 0.001 + 53 = 73.512 ms ≈ 73.5 ms
time (remote node)
Reception processing	10 ⋅ 2 + 512 ⋅ 0.001 + 53 = 73.512 ms ≈ 73.5 ms
time (remote node)
Maximum transmission	63.5 + 63.5 + 73.5 + 73.5 = 274 ms
delay

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Image 182

Omron CJ1W-ETN21 operation manual Calculation

Contents

Ethernet Units Construction of Applications Revised November Omron Product References  OmronPage Table of Contents FTP Server Index 207 Revision History 215 Table of Contents Commands Information on setting communications using CX-ProgrammerInformation on how to manage and use IP addresses Section Contents Manual Model Name Contents Number Relevant Manuals Xiii Xiv Read and Understand this Manual Application Considerations Disclaimers Xviii Confirming Unit Versions with Support Software Unit VersionsNotation of Unit Versions on Products Unit Version Notation Lowing table Precautions Intended Audience General PrecautionsSafety Precautions Safety Precautions Operating Environment Precautions Application Precautions Application Precautions Concepts Conformance to EC DirectivesApplicable Directives EMC Directives Section Functions Listed by Purpose Ethernet Unit Communications ServicesService Main functions Counterpart device Reference Acquired for the Ethernet Unit Table of Protocols Communications Protocol used Situation when used ReferenceUnit setting tag Section Smtp Common Protocol SettingsContents Default 2 POP 3 DNS Section Section Mail Send Function Advantages Mail Send Function OverviewIntroduction Description Mail Send Functions Compatibility with Earlier Models Mail Send Function DetailsComparison with the Earlier Mail Send Function Contents of E-mail Body Following header information is included Trigger condition Text entered as subject Ethernet Unit information is always included in the e-mail Words value has changed Channel data has changed from XX toEthernet Unit Information Optional Information Attached File Details Error Log Information Status InformationExtension Content Memory Data 6,000 Words Max Data sent Body/Attached file Mail body Summary of E-mail Body Information and Attached FilesFile Data 1 MB Max Specifications Mail Send Function SpecificationsFunction Specifications Details of the Available Mail Triggers Using the Mail Send FunctionProcedure Classification Trigger type Setting Setting requirement Reference Settings Required for the Mail Send FunctionTransferring the settings data Unit Setup Using the Mail Send Function Send Mail Set up to 2 destination mail addressesMail Address Data Sent by Mail When Required Data Sent in E-mail Body Send Mail Condition SettingsMail Address Specification Required Data Sent in an Attached File Send Mail Trigger Type Setting Required Attached File Name Send Mail Status Mail Send Function StatusSend Mail Status Bit numbers Status Mail Send Switch, Accessing Memory/Sending Mail FlagMail Send Switch Bit 03 of n IOM Format Accessing Memory/Sending Mail Flag Bit 01 of n+17Memory Data Formats TXT Format Attached File Transfer Times CSV Format Access Times for CS1 and CJ1 CPU Units Mail Send Function ErrorsIdentifying and Correcting Mail Send Function Errors Access Times for CS1-H and CJ1-H CPU Units Error Meaning Detailed error code Correction Troubleshooting Mail Send Errors with LED IndicatorsError Log Error Codes for the Mail Send Function Probable cause Correction Initial Server Settings Make the Unit Setup Settings from the CX-ProgrammerInitial Settings Example Example Application Destination Mail Address Setup Send Condition Setting Example Send e-mail when W300 bit 00 goes from OFF to on Transfer the CPU Bus Unit Setup SettingsAutomatic Transmission when Send Condition is Satisfied Send when there is a Change in the CPU Units Status Receive Mail Function Advantages Configuration of the MailMail Receive Function Overview Description Command Execution Results Table of Remote Mail CommandsCommand Parameters Attached File Data Received E-mail Mail Receive Function SpecificationsSpecification Response E-mail Using the Mail Receive Function Settings Required for the Mail Receive Function Tion Posting Mail Address Protection Setting Receive Mail Tab Receive Attached File Setting Receive Command Setting Format Remote Mail Command DetailsCommand Format Response Format Function Command FormatFileWrite File Write Mounted in the CPU Unit FileRead File Read FileDelete File Delete Card mounted in the CPU Unit Response Format Details FileList File List ReadEM file memory or a Memory Card mounted in the CPU Unit Memory or a Memory Card mounted in the CPU Unit UMBackup User Memory BackupCommand Format Details PARAMBackup Parameter Area Backup Or a Memory Card mounted in the CPU Unit IOMWrite I/O Memory Write Units I/O memory. The data is written in word units Subject Body IOMRead I/O Memory Read Units ReIOMRead ChangeMode Operating Mode Change Changes the CPU Units operating mode ErrorLogRead Error Log Read Bus Unit or Special I/O Unit ErrorLogClear Error Log Clear Since power was turned on or the mail log was cleared MailLogRead Mail Log Read MailLogClear Mail Log Clear Net Unit Test Mail Test Response Response Status Description Code FinsSend Fins Command SendResponse List Mail Receive Function Status Accessing Memory/Receiving Mail FlagAccessing Memory/ Receiving Mail Flag Bit 02 of n+17 IOM Format TXT Format CSV Format Access Times for CS1 CJ1 CPU Units Access Times for CS1-H CJ1-H CPU Units Troubleshooting Mail Receive Errors with LED Indicators Mail Receive Function ErrorsIdentifying and Correcting Mail Receive Function Errors Error code Meaning Detailed error code Correction Hex 1st byte 2nd byte Item name Example DNS Server IP Address Setting DNS Tab, When RequiredInitial Settings for the Mail Receive Function Backing Up the CPU Units User Program Memory Card Send Remote Mail CommandsReading Data from a CPU Unit Data Area FTP Server Specifications Overview File Types Connecting to the FTP ServerFTP Server Function Details Using the FTP Server Function FTP File Transfer Mode CX-Programmer Settings Setting conditions Tab List of Settings Required for the FTP Server FunctionSetup Tab Setting Details Default value FTP Server Application Example Confidential Using the Commands Using FTP CommandsTable of Commands Open Rename UserDir Pwd MkdirRmdir Cdup Mget TypeGet Put Close DeleteMdelete Bye Message Meaning Error Messages and FTP StatusError Messages Checking FTP Status FTP IndicatorFTP indicator Meaning FTP Status Flag File Names Using File MemoryFile Memory Directories Unit File type File name Extension Contents DescriptionFile Names Handled by CPU Unit Memory Initialization method Initializing File Memory4 I/O Memory Data Format Data format Use of CRs and CR position Section 9ABC CS1-H CPU Units/CJ1-H CPU Units FTP File Transfer TimeCS1 CPU Units/CJ1 CPU Units File system Memory Card EM File Memory Enter the login name Unix Application Example Transfer the file RESULT.IOM to the workstation Change to the Memcard directoryChange data type to binary Write the file PLAN.IOM to the Memory Card Section Automatic Clock Adjustment Function Overview CPU Unit Conditions Using the Automatic Clock Adjustment Function Settings Required for Automatic Clock Adjustment Function Settings Setting conditions Reference Auto Adjust Time Automatic Clock Adjustment Sntp Errors Automatic Clock Adjustment SwitchAutomatic Clock Adjustment Error Processing Automatic Clock Adjustment Switch Bit 04 of n Automatic Clock Adjustment Error Processing CPU Unit error Socket Services Page What are Sockets? Using Sockets with the Ethernet UnitOverview of Socket Communications from Ethernet Units Socket Port Numbers Opening TCP Sockets Protocol OverviewDifferences between TCP and UDP TCP Communications TCP Communications Procedure Passive Open and Active Open Fragmentation of Send Data Socket Service Functions Using Socket Services with Socket Service Request Switches Protocol Socket Service Request CMND490 Command code Name Using Socket Services with CMND490Specific Socket Service Functions Protocol Socket service request Manipulating Dedicated Control Bits Socket Service Function GuideDifferences with Previous Models Executing CMND490 CX-Programmer Setting Setting requirements Unit Setup Tab Using Socket Service FunctionsSettings Required for Socket Service Function Manipulating Dedicated Control Bits Setup Details Default value 109 UDP/TCP Socket Status Ethernet Unit to CPU Unit Socket Service StatusCIO Area Allocations Bit Switch Status Manipulated Unit operation DM Area Allocations TCP Connection Status Ethernet Unit to CPU Unit Application ProcedureProcedure Number Status Meaning Socket Services and Socket Status Precautions Error Evaluation Program Flow Socket Service Parameters UDP Socket Services Parameter SettingsUse of the parameters by the socket service TCP Socket Services UDP/TCP Socket No ParametersSocket Option Local UDP/TCP Port No Time Out Time Following specifications can be usedRemote UDP/TCP Port No Number of Bytes to Send/Receive Socket Service Request Switches Following diagram UDP Socket Receive Request Response CodesUDP Socket Open Request Response Meaning Code UDP Socket Send Request UDP Socket Close Request TCP Socket Passive Open Request TCP Socket Active Open Request TCP Socket Receive Request Drinuse TCP Socket Send Request Closing during Other Timing ChartsTCP Socket Close Request Processes Close Request Switch Force-close Switch Data Flow System Configuration8 TCP/IP Communications Programming Example Basic Operations CIO Area Program Memory MapDM Area Programming Example TCP Passive Open 130 Programming example uses the following system configuration 9 UDP/IP Communications Programming Example Tion on errors CIO 000000 is turned on to request opening a UDP socket from 133 134 135 Using Socket Services with CMND490 Using Socket Service 137 Socket Number Basic Fins Command FormatCommand Code Results Storage Area Socket Service Timing Chart Response Codes in the Command ResponseCommunications Timing Chart Response Codes in the Results Storage Areas 140 System Configuration Close Request during Receive Request Data Flow Basic Operations Program Memory Maps Are structured 144 145 146 147 148 149 150 151 152 153 154 UDP Socket Service Precautions in Using Socket ServicesUDP and TCP Socket Services TCP Socket Service Precautions in Using Socket Service Request Switches CS-H/CJ-H CPU Units Maximum Transmission Delays Ignoring other Network DelaysTCP Socket Services Using CMND490 CS/CJ CPU Units Calculation Using Fins Communications to Create Host Applications Overview of Fins Communications Communications On an Ethernet Network Using the FINS/UDP and FINS/TCP Methods Fins Communications Service Specifications for Ethernet Fins Response Frame Format Fins Command Frame FormatFins Frames Fins Header Information FINS/UDP Features FINS/UDP Method FINS/UDP Frame Format UDP Port Numbers for FINS/UDP Procedure for Using Communications Parameters Used by Host Computer Sending Commands from a Host ComputerDesignating Remote Addresses FINS/UDP Sample Program By sending a Fins command Memory Area READ, command codeMand, the command will be resent Operation Overview Sample Program 15 * FINS/UDP Communications Sample Program 169 170 FINS/TCP Features FINS/TCP Method FINS/TCP Connection Numbers FINS/TCP Frame FormatTCP Port Number for Age them in an internal table CommunicationsFINS/TCP Connection Status Word n+23 Automatic Allocation Procedure Automatic Allocation Fins Node Addresses 175 Setup Tab FINS/TCP Tab Fins Node Address Data Send Server to Client Command FINS/TCP Mode SpecificationsFins Node Address Data Send Client to Server Command FINS/TCP Headers Error code Details Hexadecimal Fins Frame Send CommandFollowing table shows the list of error codes Fins Frame Send Error Notification Command Command Connection Sequence Normal Operation Error Connection Sequence ACK FIN 182 183 From onwards, the connection is established again Host computer Remote node FINS/TCP Sample Program 186 187 188 189 190 191 Transmission Delay Maximum Transmission Delays Writing/Reading to CPU UnitWrite Command Delay Time Receive Processing Command CPU Bus Unit Service Cycle 704 ms Read Command Delay TimeTransmission Processing Response 194 Ethernet Network Parameters Parameter Value Description Appendix a Buffer Configuration Appendix B Network Memory TCP Status Transitions Status Meaning Appendix C Ascii Characters Space Appendix D Settings After Replacing a CPU MaintenanceSettings after Replacing an Ethernet Unit Replacing an Ethernet Unit Appendix E Tools Required for Inspection InspectionsItems Appendix F Numerics Index 209 210 211 212 213 214 Revision code Date Revised content Revision History Revision History Omron Corporation Control Devices Division H.Q Regional Headquarters Authorized Distributor