CPU Bus Unit Service Processing Time Remote Node | Omron CS1W-ETN21

Communicating between OMRON PLCs

Section 6-6

CPU Bus Unit Service Processing Time (Remote Node)

The processing time will be as follows, depending on the CPU processing mode settings at the CPU Unit.

CPU processing mode	Processing time considerations
settings

Normal Mode	Set peripheral servicing time
	Default: 4% of CPU Unit cycle time

Priority peripheral servicing	Ethernet Unit is given	Time slice peripheral servicing
	priority.	execution time

	Ethernet Unit is not	Set peripheral servicing time
	given priority.	(Default: 4% of CPU Unit cycle
		time)

Parallel processing with syn-	Set peripheral servicing time
chronous memory access	(Default: 4% of CPU Unit cycle time)

Parallel processing with	1 ms max.
asynchronous memory
access

For details, refer to the CPU Unit operation manual.

Note 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 network nodes, traffic through the Ethernet Unit (e.g., socket servicing, FTP server communications, etc.), and the system configuration.

Example Calculations

The following example shows calculations for sending 256 words between two

PLC nodes using SEND(090). Calculations are shown in the following table.

Conditions

Local node CPU cycle time: 10 ms

Local node CPU execution mode: Normal

Local node CPU uniform peripheral servicing time: Default (4%)

Remote node CPU cycle time: 5 ms

Remote node CPU execution mode: Normal

Remote node CPU peripheral servicing time: Default (4%)

Baud rate: 100Base-TX

Item		Calculation

CPU Bus Unit service cycle (local node)	10 ms

CPU Bus Unit service processing time	0.4 ms
(local node)

Transmission processing time	256 ⋅	0.002 + 0.550 = 1.062 ≈	1.1 ms

Transmission delay	256 ⋅	0.0013 + 0.0118 = 0.3446 ≈
	0.3 ms

Reception processing time	256 ⋅	0.003 + 0.704 = 1.472 ≈	1.5 ms

CPU Bus Unit service cycle (remote node)	5 ms

CPU Bus Unit service processing time	0.2 ms
(remote node)

Total	10 + 0.4 + 1.1 + 0.3 + 1.5 + 5 + 0.2 =
	18.5 ms

149

Image 174

Omron CS1W-ETN21 operation manual CPU Bus Unit Service Processing Time Remote Node, Example Calculations

Contents

Ethernet Units Construction of Networks Revised January Page Omron Product References  Omron Unit Versions Notation of Unit Versions on ProductsConfirming Unit Versions with Support Software 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 CQM1H-PRO01-E WS02-CXPC1-EV6CXONE-AL@@C-E CQM1-PRO01-E Xvi Read and Understand this Manual Application Considerations Disclaimers Page Precautions General Precautions Safety PrecautionsIntended Audience Operating Environment Precautions Application Precautions Application Precautions Concepts Conformance to EC DirectivesApplicable Directives EMC Directives Low Voltage Directive Section Ethernet Unit Function Guide Overall System Configuration ExampleConnecting the CX-Programmer to PLCs Online via Ethernet 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 Compatibility and Speed FeaturesSimplified Socket Services Various Protocols Available on Ethernet Improved Fins Message Communications Additional E-mail Functions Use Web Function to Read Ethernet Unit Settings and Status Automatic PLC Internal Clock AdjustmentSpecification of Servers by Host Name Network Connection with Controller Link Setup Area and Related Peripheral Devices System ConfigurationSystem Configuration Devices Required for Constructing a Network Routing Table Area Specifications SpecificationsGeneral Specifications CS-series Ethernet Unit CJ-series Ethernet Unit Dimensions Software Configuration Overview of Communications Functions Fins Communications ServicePLCs, mode changes, and file memory operations Basic Functions Socket Services Upgraded FunctionsManipulating Dedicated Control Bits Executing CMND490 Improved TCP Socket Interface FTP Server Function Mail Send Function Mail Receive Function Automatic Clock Adjustment Function Specifying Servers by Host Name CS-series Ethernet Units Nomenclature and FunctionsComponent Names CS1W-ETN21 100Base-TX CJ-series Ethernet Units CJ1W-ETN21 100Base-TXFront Indicators IP AddressSubnet Mask Indicator Color Status Meaning Comparison with Previous Models Previous models New modelsCS1W-ETN11 CS1W-ETN21 CJ1W-ETN11 CJ1W-ETN21 Unit Version Unit Version Upgrade InformationUpgrade Details FINS/UDP Installation and Initial Setup Overview of Startup Procedure Tables Setting the Node Address Switch SettingsSetting the Unit Number Setting range Unit CJ-series Ethernet Units Mounting to a PLC Mounting to a CS-series PLCMounting to a CJ-series PLC Network Installation Basic Installation Precautions Basic Precautions PrecautionsPrecautions on Laying Twisted-pair Cable Recommended Products Stack Connections Connect the hubs using special cables or special racksCascade Connections Hubs per stack Cable Location Using Contact Outputs Common to All UnitsMounting Location Hub Measures Connecting the Cable Connecting to the NetworkEthernet Connectors Connector pin Signal name Abbr Signal direction 1 I/O Table Overview Connecting Programming Devices to the PLCCreating I/O Tables Devices CX-Programmer Version 3.20 or Higher and CX-Integrator Procedure for Creating I/O TablesConnecting Programming Devices Programming Console 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 Operation status Default SettingUnit Setup +98 +99 Subnet Mask Broadcast SettingsSetting Contents Class Subnet mask Baud Rate TCP/IP Keep-alive SettingSettings Set the baud rate CX-Programmer tab Settings Unit Setup for Particular ApplicationsSocket Services CX-Programmer tab Setting Setup Keep-alive Smtp Automatic Clock AdjustmentMail Reception POP Communications Test Ping CommandCX-Programmer Setting item Tab Ethernet Unit Method Converting from Previous ModelsHost Computer 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 Not lit If an Error Occurred in the Mode ChangeNode address Indicators 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 Server Setup For details, refer to Automatic Clock Adjustment FunctionHttp Section Ethernet Unit Memory Allocations CIO Area Allocations Automatic Clock Adjustment Switch Bit Socket Force-close Switch BitMail Send Switch Bit Unit Control Bits CPU Unit to Ethernet Unit Status of UDP/TCP Sockets 1 to 8 Ethernet Unit to CPU Unit Opening Flag BitBit Flag Status Manipulated Unit operation Reference Sending Flag Bit Results Storage Error Flag BitReceiving Flag Bit Closing Flag Bit FTP Status Bit Service Status Ethernet Unit to CPU UnitAccessing Memory Sending Mail Bit Bit Name Status Manipulated Unit operation Reference Error Status Ethernet Unit Accessing Memory Receiving Mail BitSystem Setup Format Bits 8 to 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 Send Mail Status 1, 2 Ethernet Unit to CPU Unit Send Mail StatusBits Status +1 to m+8 Number of Bytes Received 0000 to 07C0 hex IP Address Display/Setting Area Application Setting device Setting area Remarks Area of PLC memory that are related to the Ethernet Unit Words Bits Name Function SettingsAuxiliary Area Data Read-only Bits/Words Read/Write Bits User Settings Bits Name Description Settings Section Determining IP Addresses Allocating IP Addresses IP Address ConfigurationIP Addresses Class Number of networks Number of hosts Ethernet Unit IP Address Settings Subnet MasksClass Subnet Mask value Allocating Addresses to Ethernet Units Specifying Nodes in Fins Communications ServicesIP Addresses in Fins Communications Ethernet Unit Fins Message Reception Remote Fins node Remote IP address Connection Remote port Automatic Generation Method Dynamic/StaticIP Address Table Method and Combined Method Example Number Example Automatic Generation Dynamic Pairing Addresses in Internal TablesFINS/UDP Communications Methods Automatic Generation Static Example Combined Method Prohibiting Dynamically Changing Remote IP Addresses Using the ETN11- compatible Mode Internal Processing Pairing in the FINS/TCP MethodFINS/TCP Communications Method Local Device Is FINS/TCP Client Setting FINS/TCP Connections Local Device Is ServerLocal Device Is a Client Responding to Computers with Changed IP Addresses Automatic IP Address Setting by Dhcp ServiceApplication Examples FINS/UDP Communications Method Related Products and Communications/Setting Methods Models Supporting Automatic Generation Method Dynamic Models Supporting Automatic Generation Method Static Models Supporting IP Address Table MethodModels that Can Use the Combined Method Private and Global Addresses Private and Global AddressesFINS/UDP and FINS/TCP 108 Using a Private Address for the Ethernet Unit Conditions for Using Communications ApplicationsFins Communications Service Sending Mail Automatic Clock AdjustmentTransferring Files Receiving Mail Ethernet Unit with a Global Address Mail via the intranet, even if it as a private address Considerations, on using POP before SmtpUDP/TCP port number default 53 to be used for DNS cannot be PLC can receive the Ethernet Units IP address from the POP3 Fins Communications Using the FINS/UDP and FINS/TCP Methods Overview of Fins CommunicationsCommunications On an Ethernet Network Fins Communications Service Specifications for Ethernet FINS/UDP Features FINS/UDP MethodOverview Procedure for Using FINS/UDP UDP Port Numbers for FINS/TCP Features FINS/TCP Method TCP Port Number for FINS/TCP Connection Numbers Communications ProcedureFINS/TCP Connection Status Word n+23 Internal table Procedure for Using FINS/TCP Setup TabFINS/TCP Tab Local Network Table Creating Routing TablesRouting Table Overview 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 Settings for target PLC PLC1s Change PLC Dialog Box Using Fins ApplicationsSystem Configuration Example 1 No Routing CX-Programmer CX-Server CX-Programmers Unit Setup Setup Tab 128 Settings for target PLC PLC3s Change PLC Dialog Box System Configuration Example 2 Using Routing TablesRouting Table Settings and Transfer to Each PLC PLC3 FinsGateway Overview of Setup Methods Starting FinsGateway SettingsEtnunit Driver Setup Local Network Table Network Tab Communication Unit Tab 132 133 Starting FinsGateway Etnunit Service Conditions Not set. All defaults are used Communications SpecificationsCX-Programmers Unit Setup Communicating between Omron PLCs PLC Communications Data Areas Area Range Using SEND090, RECV098, and CMND490 SEND090Ning word D at the remote destination node node address N 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 Completion Codes Communications Port Error Flag and Completion Codes CMND490Word Contents Timing of Communications Flag Changes 144 Program Example 146 CPU execution mode Processing time considerations Transmission DelaysCPU Bus Unit Service Cycle Local Node SEND090 CPU Bus Unit Service Cycle Remote Node CPU Bus Unit Service Processing Time Local NodeTransmission Delay Transmission Processing Time Example Calculations CPU Bus Unit Service Processing Time Remote NodeCPU processing mode Processing time considerations Settings Calculation Equation illustrated in the following diagram RECV098 Reception processing time command Transmission processing time commandTransmission Delay Command Response 152 Precautions on High Traffic in Fins Communications Conditions for High TrafficCalculations Avoiding Errors due to High Traffic Fins Commands Addressed to Ethernet Units Response Code List Command Codes and Response CodesCommand Code List Command code Name Socket Applications Format Parameters Communications TypeCIO Command/Response Reference Reset FINS/UDP Port Number Setting Broadcast Address SettingIP Address Conversion Method Setting Controller Data Read Controller Status Read IP Address Table Error Error Flags ResponseIP Address Error IP Router Table Error Eeprom Error Internode Echo TestRuns the echo test between specified nodes Broadcast Test Results Read Command Block Response Block ParametersTest Data Command, Response Broadcast Data Send Reads the error log Error LOG ReadTest Data Command Bytes can be specified Error Code, Detailed Information Error LOG ClearError Log Data Response Minute, Second, Day, Hour, Year, Month UDP Open Request Results Storage FormatRequests processing to open a socket Requests that data be sent from a UDP socket UDP Socket Number Command Results Storage Area CommandUDP Receive Request Enobufs UDP Send Request Results Storage Area Response CodesRequests that data be received by a UDP socket 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 Econnaborted EconnresetActive TCP Open Request Tunreach 175 Eacces Drnotavail TCP Receive Request Requests that data be sent from a TCP socket TCP Send Request Requests that data be received at a TCP socketEtimedout Results Storage Format Parameters TCP Close Request EnetunreachEhostunreach Destination IP Address Command Timeout Value Command PingResponse Block Parameters Ping Command FINS/TCP Connection Remote Node Change RequestRemarks 2232 FIFINS/TCP Connection No. Command ResponseFINS/TCP Connection Status Read Reads the FINS/TCP connection status Remote TCP Port Number Response TCP Transitions Response Number of Records CommandIP Address Table Write Writes the IP address table IP Address Write Precautions Response CodesIP Address Table Records Command 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 IP Status Response Protocol Status ReadReads the Ethernet Unit protocol status Value Type number Description Connection Information 60 Bytes Send Information 40 Bytes Receive Information Memory Status Read Memory Status Response Socket Status Read Reads Fins node addresses and IP addresses Address Information ReadTCP Transitions 4 bytes Number of Addresses Response IP address set on the Ethernet Unit hexadecimal IP Address ReadNode 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 Error Log Logged ErrorsFollowing errors are recorded in the error log Error Log Error Codes Error Log TableError Log Location Fins Commands for Error Logs 204 205 206 207 208 Troubleshooting Procedures Startup Problems Fins Communications Problems SEND090/RECV098/ CMND490 Is the control data For the instruction set Incorrectly? Problems UDP Socket ProblemsGeneral Problems Opening and Closing Reception Problems Read Controller Status Transmission Problems Is send Y processing not Finishing? TCP Socket Problems General Problems Opening Problems Closing ProblemsRefer to General Problems on 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? Controller Troubleshooting with Response CodesMain code Sub-code Check point Probable cause Remedy Status Read 224 225 226 Codes stored in the Results Storage Area Network Relay ErrorsResults Storage Area Response Codes Devices Ealready EisconnEnotconn 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 Settings after Replacing a CPU MaintenanceSettings after Replacing an Ethernet Unit Replacing an Ethernet UnitPage Inspections ItemsTools Required for Inspection Page Unit Setup Functions Ethernet Unit Web FunctionWeb Function List Appendix G POP Status Monitor Web Function PasswordUsing the Web Function Setting Password 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