6-4
6.1.2 Types of Open Processing
Open processing when using TCP/IP
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Transmission Control Protocol (TCP) is a type of connection protocol in which it is necessary to open
mutual connections between the source and partner nodes before communication processing can be
carried out.
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There are three ways to open a connection, as described on the following page.
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With the ET-LAN unit, the method of opening the connection is specified by writing a value to the
shared memory.
Open processing when using UDP/IP
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User Datagram Protocol (UDP) is a protocol in which connections are not used. Data can be
transferred simply by specifying the IP address of the partner node and the number of the port being
used, so no mutual connections need to be opened.
-
With the ET-LAN unit, however, open processing is necessary in order to specify the application, the
number of the port being used, and the IP address.
Note:
If connections have been functionally opened for both the source and partner nodes (active connections
are open), or if the connections between the source and partner nodes are passively open (Fullpassive
open or Unpassive open), no connection is opened between the nodes when open processing is carried
out.
Содержание FP2 ET-LAN
Страница 11: ...Chapter 1 Unit Functions and Restrictions ...
Страница 14: ...1 4 1 1 4 Connecting to a Network AFP2790 100BASE TX 10BASE T 10BASE5 AUI AFP27901 ...
Страница 24: ...1 14 ...
Страница 25: ...Chapter 2 Names and Functions of Parts ...
Страница 29: ...Chapter 3 Connection for LAN Cable ...
Страница 37: ...Chapter 4 Confirming the Design Contents ...
Страница 49: ...Chapter 5 Initialization Processing and Termination Processing ...
Страница 51: ...5 3 Operation of the ET LAN unit The relationship between initialization processing and open processing ...
Страница 68: ...5 20 ...
Страница 69: ...Chapter 6 Open Processing and Close Processing ...
Страница 71: ...6 3 Operation of the ET LAN unit The relationship between open processing and close processing ...
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Страница 85: ...Chapter 7 Computer Link Function ...
Страница 94: ...7 10 Program example ...
Страница 97: ...7 13 Example of communication data Same hierarchy communication ...
Страница 100: ...7 16 Example of communication data Other hierarchy communication ...
Страница 101: ...7 17 Other hierarchy communication for MEWTOCOL COM ...
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Страница 103: ...Chapter 8 Data Transfer Function ...
Страница 111: ...8 9 Program example ...
Страница 114: ...8 12 Example of communication data Same hierarchy communication ...
Страница 117: ...8 15 Example of communication data Other hierarchy communication ...
Страница 119: ...8 17 Other hierarchy communication for MEWTOCOL DAT ...
Страница 120: ...8 18 ...
Страница 121: ...Chapter 9 Transparent Communication Function ...
Страница 137: ...9 17 Program example ...
Страница 140: ...9 20 Reception processing After the following program has been run the received data is read from the receive buffer ...
Страница 141: ...9 21 9 5 3 Sample Program Reception to Transmission Program example for transmitting received data as it is ...
Страница 143: ...Chapter 10 Auto Connection ...
Страница 155: ...10 13 Case 1 Ladder program example ...
Страница 169: ...Chapter 11 E mail Function ...
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Страница 201: ...Chapter 12 Error Log Function ...
Страница 203: ...12 3 Latest log block area Log block reading processing area ...
Страница 219: ...Chapter 13 Troubleshooting ...
Страница 224: ...13 6 13 2 4 Troubleshooting Flowchart ...
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Страница 229: ...Chapter 14 MEWTOCOL Communication Procedure ...
Страница 241: ...14 13 WD Write data area This writes the contents of the data area To write the contents of DT LD and FL ...
Страница 242: ...14 14 To write to an index register ...
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Страница 263: ...Chapter 15 Specifications ...
Страница 292: ...15 30 15 6 ASCII Codes ...
Страница 293: ...15 31 15 7 Dimensions AFP2790 FP2 ET1 AFP27901 FP2 ET2 ...
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Страница 295: ...Chapter 16 Sample Program ...
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