Performance data
2.3 Characteristics of S7 communication
CP 343-1 Lean
16 Manual, 10/2012, C79000−G8976−C198−07
● Further TCP connections for Web diagnostics
● PROFINET IO
– As PROFINET IO device:
1 PROFINET connection to a PROFINET IO controller
or
– As shared device:
2 PROFINET connections to 2 PROFINET IO controllers
2.3 Characteristics of S7 communication
Number of connections
Table 2- 2 Number of connections for S7 communication
Characteristic Explanation / values
Number of connections for S7 communication via
Industrial Ethernet for:
Operator control and monitoring functions
(HMI)
S7 connections configured at one end
Maximum 4 (one-ended connections)
The number depends on the CPU type being used; the valid values
can be found in /1/ (Page 60).
LAN Interface - data record length per protocol unit
sending
receiving
240 bytes / PDU
240 bytes / PDU
2.4 Characteristic data of the SEND/RECEIVE Interface
The SEND/RECEIVE interface provides access to communication over TCP, ISOonTCP and
UDP connections.
The following characteristics are important:
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