5 Configuring Communication Connections
A-104
S7-CPs for Industrial Ethernet Configuring and Commissioning
Release 01/2007
C79000-G8976-C182-07
Note
The term “connection” is also used here for UDP. Reason: During configuration
(just as in TCP) the communication partners are assigned to each other and
therefore logically “connected”. In actual fact, with UDP there is no explicit
connection establishment between communication partners.
Amounts of Data
Refer to the manual /2/ supplied with the Ethernet CP for the number of
communication connections supported by the Ethernet CP. The number of
connections per station can be increased by adding more CPs.
The Ethernet CP can transfer the amounts of data shown in the table below per job
on one connection:
Table 5-1
ISO Transport ISO-on-TCP TCP UDP
Sending 8192 bytes 8192 bytes 8192 bytes 2048 bytes
Receiving 8192 bytes 8192 bytes 8192 bytes 2048 bytes
Notice
The transfer of more than 240 bytes of data is supported by the current CPs.
Older version CPs support data transfer with a data length of up to 240 bytes.
Please note the information in Section 7 and in the manual of the Ethernet CP.
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