Omron Sysmac NY512-1300, Руководство пользователя

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9-9
9 Socket Service
NY-series Industrial Panel PC / Industrial Box PC Built-in EtherNet/IP Port User’s Manual (W563)
9-2 B
asic Kn
owledg
e on
Proto
cols
9
9-2-
3 Dat
a Receptio
n Processing
• When There Is Only One Receive Request for Data Sent for Multiple Send Requests
You cannot use just one receive request to receive the data that was sent for multiple send
requests, regardless of the size of the data.
Example 2: Receive Request for 1,000 Bytes when 200 Bytes of Data Was Sent for Two Send
Requests
1. The data that was sent from the sending node in two sends is stored in the receive buffer.
2. Even if a receive request is made for 2,000 bytes of data, only the 100 bytes that was sent for the
first send request is received.
100 bytes
Data A
Data B
100 bytes Data A Data A
Data B 100 bytes
Sending node (host computer) Receiving node (Controller)
Data B
1st send
request
2nd send
request
Built-in EtherNet/IP port
User program
200 bytes
Receive buffer
(9,000 bytes)
User program
You can receive the rest
of the data with another
receive request.
Ethernet line
(1) Data received to
receive buffer.
(2) 1st receive request
(request for 1,000
bytes)