Rockwell Automation 1768-EWEB EtherNet/IP Web Server Module User Manual - Manual (Page 138)

Publication ENET-UM527E-EN-P - October 2006
138 Socket Interface
Partial Writes
Your program may need to handle the situation, although uncommon,
where the Write service is unable to send all the specified bytes. Such
a situation can occur if the Write service is called multiple times before
the target application can receive the data.
If the Write service is not able to send all of the requested data, your
program should issue subsequent Writes to send the remaining data.
Your program should also adjust the source tag, so that old data is not
sent.