UDP close processing example Ladder program flowchart | Toshiba T2N

6 F 3 B 0 3 6 2

e.UDP close processing example

Ladder program flowchart

UDP close processing start

Socket status read/verify

Are bits C and E both 1?	No
(Opened state?)
Yes

Execute a UDP close request

(CMD = 0034H).

Hold the input of function block in the on state until the SEND instruction completes.

Instruction completion

Error result

The specified UDP socket is already in the closed state.

Verify the status

Normal complete?

Yes

No

An error occurred in the close processing and the specified socket could not be closed.

Handle the error according to the completion and socket status.

Terminate UDP close processing

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Toshiba T2N instruction manual UDP close processing example Ladder program flowchart

Contents

T2N Ethernet Port Important Information Concerning Important Points Safety Precautions 3 B 0 3 6 Safety Precautions ∙ Precautions for operation ∙ Mounting in the base unit ∙ Connecting to the network ∙ Installation environment and base unit mounting ∙ Basic points in laying out a network ∙ Maintenance ∙ Support for 10BASE-T network Usage Recommendations∙ Ethernet Port registration ∙ Restrictions on subnet masks ∙ Computer link protocol transmission 3 B 0 3 6 Usage Recommendations∙ Limitations on the T2N Send and Recv instructions Ethernet Port Overview Error HandlingEthernet Port Parts and Functions Preparing for Operation Hardware Appendix Installation and WiringRegistered trademarks Contents Socket Interface Communication ……………………………………………………… System Configuration Examples System Configuration Using the Ethernet Port 10BASE2 LAN Standards and Terminology Series computer link protocol transmission slave port Basic Functionality T Series/PC Link Protocol Transmission 3 B 0 3 6 Series/PC link protocol transmission Socket Interface 3 B 0 3 6 Socket interface support Gateway Function 3 B 0 3 6 PC programmable controller gateway function 10BASE-T 3 B 0 3 6 Support for 10BASE-T Network Functional Specifications Ethernet Port Specifications TCP transmission control protocol Software Organization UDP User datagram protocol ARP Address resolution protocolIP Internet protocol Icmp Internet control message protocol Front Panel PU235N/245N External Dimensions 10BASE-T connecting connector Content DisplayedComponent Functions LED Display Preparing for Operation Hardware Connection to a 10BASE-T Network Connecting to the Network 10BASE-T Network Wiring EquipmentCatalog no Manufacturer Diameter Manufacturer 3 B 0 3 6 10BASE5Diameter Length Manufacturer Catalog no 3 B 0 3 6 10BASE2 Ethernet Port Setup Flowchart Software Ethernet Port Setup Flowchart Software Instruction format Ethernet Port Instruction SpecificationsOperand Important items Instructions Requests to the Ethernet Port Part 3 B 0 3 6 Transfer parameters a Send TermSTS Part Status 3 B 0 3 6 Status BMeaning 0AH Error Code Description Detailed Information Ethernet Port Error Responses PART1 Detailed Information Ethernet Port Error Responses PART2 T2N power on Ethernet Port Reset Reset request using the Send instruction 3 B 0 3 6 Reset request from the T2N IP address Parameter Setup RequestIP address format IP address acquisition Broadcast addresses Subnets and the subnet mask 3 B 0 3 6 Port number Parameter setup request using the Send instruction ∙ Message transmission UDP port number ⎯ 45 ⎯ Initialization mode Operating Mode Control RequestsStandby mode Run mode Shows the Ethernet Port mode transitions Operating mode control request using the Send instruction ⎯ 49 ⎯ Computer Link Protocol Transmission ∙ Remote UDP port number Sample Computer Link Protocol Program ⎯ 52 ⎯ ⎯ 53 ⎯ ⎯ 54 ⎯ ⎯ 55 ⎯ ⎯ 56 ⎯ PC Link Protocol Transmission Data write Register write request using the Send instruction RID Supplement T and C registers hold data that has flags attached XW/YW PC Link Protocol Transmission Data read Register read request using the Recv instruction Transferred register data length ⎯ 63 ⎯ Sample PC Link Protocol Transmission Program ⎯ 65 ⎯ ⎯ 66 ⎯ ⎯ 67 ⎯ Positioning and functionality Overview UDP Sockets UDP socket interface See figure TCP Socket Connection TCP socket interface See figures 6.3 TCP Connection Communication Procedure Overview Transmission Data Fragmentation in the UDP Socket Interface Ethernet Port Socket Interface Usage Notes ⎯ 73 ⎯ Handling of Transmitted Data in the TCP Socket Interface ⎯ 75 ⎯ Transmission Data Fragmentation in the TCP Socket Interface Packet Format/IP Datagram 3 B 0 3 6 Socket interface port numbers UDP socket interface notes 3 B 0 3 6 TCP socket interface notes ⎯ 81 ⎯ Socket Interface Information Socket identifier Socket Interface Information TCP UDP open request using the Send instruction Using the Ethernet Port Socket Interface ⎯ 85 ⎯ Error result UDP open processing example Ladder program flowchart Transmission data Broadcast transmission UDP transmission processing example Ladder program flowchart To the object socket in a single operation Methods for storing reception data Broadcast reception Status Send completion timeout TermSTS = 06H ⎯ 93 ⎯ ⎯ 94 ⎯ 3 B 0 3 6 UDP close request using the Send instruction UDP close processing example Ladder program flowchart Stcpportno 3 B 0 3 6 TCP open request using the Send instruction ¬The passive open timeout TCP open processing example Ladder program flowchart 3 B 0 3 6 TCP send request using the Send instruction ⎯ 101 ⎯ ⎯ 102 ⎯ TCP transmission processing example Ladder program flowchart 3 B 0 3 6 TCP receive request using the Recv instruction ⎯ 105 ⎯ ⎯ 106 ⎯ ⎯ 107 ⎯ ⎯ 108 ⎯ 3 B 0 3 6 TCP close request using the Send instruction ⎯ 110 ⎯ TCP close processing example UDP sockets Sample ProgramsUDP open request UDP close request UDP send request UDP receive request TCP open request passive 3 B 0 3 6 TCP sockets TCP open request active TCP close request TCP send request TCP receive request ⎯ 121 ⎯ RAS Information Special relays the renewing cycle of 100 ms T2N Special Relays and RegistersSpecial registers Station status format Operation mode and station status of Ethernet Port Down Information Down Information Error code H Interpretation Remote Port Verification Request Remote port verification request using the Send instruction ⎯ 127 ⎯ Remote Port Loopback for an Ethernet Port Remote port loopback request using the Send instruction Time Setting 3 B 0 3 6 Time set request using the Send instruction ⎯ 131 ⎯ RAS Information Readout RAS information readout request using the Recv instruction ⎯ 133 ⎯ ⎯ 134 ⎯ RAS information details Symbol DescriptionRAS Counters Mibif Mibtcp Mibip Mibudp MIB information Mibudp ... UDP protocol information Event Trace Items ∙ Event trace item See table ⎯ 139 ⎯ States Indicated by the Erun LED LED DisplayLED display State 3 B 0 3 6 States Indicated by the Eacc LED Status error status TermSTS Status Meaning TermSTS Part Detailed Information Ethernet Port Error Responses Special registers Rclos If the Ethernet Port fails during operation TroubleshootingIf a Send or Recv instruction fails complete Replace the PU235N/245N Parameter setup request 3 B 0 3 6 If the Ethernet Port fails to enter run mode Operating mode control request ⎯ 151 ⎯ Ethernet Port side slave port Main port side Ethernet Port 3 B 0 3 6 If PC link protocol transmission fails ⎯ 154 ⎯ ⎯ 155 ⎯ Completion? Send request Receive request Open request 3 B 0 3 6 If Transmission Using TCP Sockets Fails Close request ⎯ 160 ⎯ ⎯ 161 ⎯ Check items Countermeasure 3 B 0 3 6 Network check items Ethernet Port Installation Environment and Base Unit Mounting Installation and Wiring Wiring Environment and Work Operations Network Wiring Separation from other wiring 3 B 0 3 6 Overview of wiring without protective pipes Meters Covered metal ducts or metal pipe Parallel separation Up toOr over Wiring routes Overview of panel internal wiringWiring path Securing coaxial cable ⎯ 168 ⎯ Inspection item Criterion Resolution procedure Appendix 1 Maintenance and InspectionPeriodic Inspection Table A.1 ⎯ 170 ⎯ Table A.2 Instructions Requests to the Ethernet Port Appendix 2 Request Code TableReference Figure A.1 Status Structure Table A.3 TermSTS Part Appendix 3 Status Table Table A.4 TermSTS Part Table A.5 Detailed Information Ethernet Port Error Responses Figure A.2 Word Counts Considered with the PC Link Protocol When using the PC link protocol with the Ethernet Port Conditions for the above table Figure A.3 T2N Configuration when Using the PC Link Protocol When the PC link protocol is not used Number of Words that can be Transmitted Using TCP/UDPSocket Transmission with the Ethernet Port Figure A.5 T2N Configuration when Using the PC Link Protocol