Omron Sysmac NY512-1300, Руководство пользователя

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9 Socket Service
9-6 NY-series Industrial Panel PC / Industrial Box PC Built-in EtherNet/IP Port User’s Manual (W563)
The conditions shown in the following figure occur when data is sent in fragments in UDP communica-
tions.
(1) A send request is sent from the user program at the sending node. It specifies a vari-
able with a data length of 2,000 bytes.
(2) The built-in EtherNet/IP port separates the send data into 1,472 bytes in data A and
528 bytes in data B.
(3) Data A and data B are sent in sequence by the sending node.
(4) Data A and data B are joined to restore the original send data, and the data is passed
to the user program.
Because UDP communications are performed in datagram units as shown above, send data is
returned to the original data format before it is passed to the user program.
Using UDP
Built-in
EtherNet/IP port
User program
(3)
Data A and
data B are
separated
and sent.
(2) Fragmenting
Receiving node
1,472 bytes
528 bytes
Data A
Data B
Original data
User program
2,000 bytes
(1) Send request
Sending node (Controller) Receiving node (host computer)
(4) Receive request
2,000 bytes
Data A Data B
Ethernet line