Siemens CPU 31 Series Technical Data Manual page 242

English
Open communication over Industrial Ethernet
The open communication over Industrial Ethernet is upgraded for the
CPU 319-3 PN/DP after firmware-version 2.4.0 by the following product variants:
S Connection-oriented log: ISO on TCP according to RFC 1006
S Connectionless log: UDP according to RFC 768
Download of the components for the log variants UDP according to RFC 768
In order to exchange data with other communication partners via application
program, we are making the necessary components available to you on the
Internet:
You can find these files on the Internet at:
http://support.automation.siemens.com/WW/view/en/22146612
Cyclic transmission to multiple OUC entities
Cyclic transmission to multiple OUC entities with transmission cycles < 2.2 ms can
affect communication via the Ethernet interface.
In this case, you must extend your transmission cycle by scaling the calls of the
send block:
S FB63 "TSEND" for TCP transmission or
S FB67 "TUSEND" for UDP transmission.
For additional information, contact Service & Support via:
http://support.automation.siemens.com/WW
Using CPU 319-3 PN/DP with SINAMICS S120
Use of CPU 319-3 PN/DP in combination with the PROFINET module SINAMICS
S120 CBE 20 (6SL3055-0AA00-2EB0) requires STEP 7 V5.4.
This STEP 7 version is required to enable full functionality of the PROFINET
GSDML version V2 (multi-API, physical device and multiple subslots per slot).
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Product Information on CPU319-3 PN/DP, 6ES7318-3EL00-0AB0
A5E00688649-02