Omron Sysmac NJ-series User Manual page 323

• 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
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.
Sending node (host computer)
User program
100 bytes
100 bytes
NJ/NX-series CPU Unit Built-in EtherNet/IP Port User's Manual (W506)
Requests
Ethernet line
1st send
request
Data A
Data B
2nd send
request
Receiving node (Controller)
Built-in EtherNet/IP port
(1) Data received to
receive buffer.
(2) 1st receive request
Receive buffer
(9,000 bytes)
Data A
Data B
You can receive the rest
of the data with another
200 bytes
receive request.
9 Socket Service
User program
(request for 1,000
bytes)
Data A
100 bytes
Data B
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