Siemens Simantic Net NCM for Industrial Ethernet S7 User Manual
Page 27
Communication via Ethernet CPs in S7 Stations
27
SIMATIC NET NCM S7 for Industrial Ethernet
C79000-G8976-C129–06
1.5
S5-compatible Communication (SEND/RECEIVE
Interface
1
)
Application
Using the SEND/RECEIVE interface, your S7 user program has access to
S5-compatible communication with configured transport connections.
Data transmission on a configured transport connection is suitable for
S
the reliable transmission of related blocks of data between two Ethernet nodes
using
– TCP (see /17//19//20/) with ISO-on-TCP connection (see /18/) or TCP
connection;
– ISO transport connection
S
simple (unacknowldeged) transfer of related blocks of data (datagram service)
between two Ethernet nodes with UDP (User Datagram Protocol) on IP.
The SEND/RECEIVE interface is also suitable for sending E-mail (refer to the
manual for the IT-CP /5/).
For TCP applications, there is an active network with IP protocol (see /20/).
ISO Transport Connection
ISO transport provides services for the reliable transfer of data on configured
connections. Due to the segmentation of the data, large amounts of data can be
transmitted.
Transmission reliability is extremely high due to automatic repetition and additional
field check mechanisms. The communications partner confirms reception of data
and the sender receives a return value on the SEND/RECEIVE interface.
ISO transport is operated only on Industrial Ethernet and is optimized for
high-performance operation at the self-contained manufacturing level.
1
The previous name of the SEND/RECEIVE interface was S5S5 connections