3 B 0 3 6 If Transmission Using TCP Sockets Fails | Toshiba T2N

6 F 3 B 0 3 6 2

8.If Transmission Using TCP Sockets Fails

When troubleshooting TCP sockets, also refer to the section "TCP socket interface notes" in

section 6.2, Ethernet Port Socket Interface Usage Notes.

a.Open request

START

Did the SEND instruction

complete?

Yes

Did the instruction time out?

TermSTS = 0BH

Details = 0020H

Yes

¬

No

No

Was the wait time set to

unlimited? Yes

¬

Is the station status such that run + socket transmission is enabled?

Yes

Resolve the problem by referring to the status.

		Verify the status using the
	No	procedure described in the
	No	item 3 " If a SEND or RECV
		item 3 " If a SEND or RECV
		instruction fails complete"
		on page 148.

No	Set the Ethernet Port to run
No	+ socket transmission
	enabled using an operating
	mode control request.

Is the program attempting to

issue an active open to a socket in the passive open state?

Yes

Are the remote port IP address and TCP port number correct?

Yes

Does a response come back

if a ping is issued to the

remote port?

Yes

Is the error counter read out from the RAS information constant (i.e., not being incremented)?

(Use RAS information

readout to determine this.)

Yes

END

	No	Decide which role each socket will play when
	No	establishing a connection between a pair of
		establishing a connection between a pair of
		sockets.

No	Verify the remote port IP address and TCP port
	number.


	1.	Recheck the remote port IP address and
No		message transmission TCP port numbers.
	2.	Verify that there is no router on the network.
	3.	Check the network verification items.

	No	It is possible that there is an abnormality on the
	No	network itself. Check the network verification
		network itself. Check the network verification
		items.

RAS error counters: Alignment error

Short packet

CRC error

⎯ 158 ⎯

Image 159

Toshiba T2N instruction manual 3 B 0 3 6 If Transmission Using TCP Sockets Fails, Open request

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 ∙ Restrictions on subnet masks Usage Recommendations∙ Support for 10BASE-T network ∙ Ethernet Port registration 3 B 0 3 6 Usage Recommendations ∙ Computer link protocol transmission∙ Limitations on the T2N Send and Recv instructions Preparing for Operation Hardware Error HandlingEthernet Port Overview Ethernet Port Parts and Functions Installation and Wiring AppendixRegistered 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 Icmp Internet control message protocol ARP Address resolution protocolUDP User datagram protocol IP Internet protocol Front Panel PU235N/245N External Dimensions LED Display Content Displayed10BASE-T connecting connector Component Functions Preparing for Operation Hardware Connection to a 10BASE-T Network Connecting to the Network Manufacturer Network Wiring Equipment10BASE-T Catalog no Manufacturer Catalog no 3 B 0 3 6 10BASE5Diameter Manufacturer Diameter Length 3 B 0 3 6 10BASE2 Ethernet Port Setup Flowchart Software Ethernet Port Setup Flowchart Software Important items Ethernet Port Instruction SpecificationsInstruction format Operand Instructions Requests to the Ethernet Port Part 3 B 0 3 6 Transfer parameters a Send 3 B 0 3 6 Status B TermSTS Part StatusMeaning 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 acquisition Parameter Setup RequestIP address IP address format 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 ⎯ Run mode Operating Mode Control RequestsInitialization mode Standby 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 Sample Programs UDP socketsUDP 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 Station status format T2N Special Relays and RegistersSpecial relays the renewing cycle of 100 ms Special registers 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 ⎯ Mibif Symbol DescriptionRAS information details RAS Counters Mibtcp Mibip Mibudp MIB information Mibudp ... UDP protocol information Event Trace Items ∙ Event trace item See table ⎯ 139 ⎯ LED Display States Indicated by the Erun LEDLED 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 Replace the PU235N/245N TroubleshootingIf the Ethernet Port fails during operation If a Send or Recv instruction fails complete 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 Covered metal ducts or metal pipe Parallel separation Up to MetersOr over Securing coaxial cable Overview of panel internal wiringWiring routes Wiring path ⎯ 168 ⎯ Table A.1 Appendix 1 Maintenance and InspectionInspection item Criterion Resolution procedure Periodic Inspection ⎯ 170 ⎯ Appendix 2 Request Code Table Table A.2 Instructions Requests to the Ethernet PortReference 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 Number of Words that can be Transmitted Using TCP/UDP When the PC link protocol is not usedSocket Transmission with the Ethernet Port Figure A.5 T2N Configuration when Using the PC Link Protocol