1 Properties / Services
B−5
CP 343-1 Lean for Industrial Ethernet / Manual Part B
Release 09/2009
C79000-G8976-C198-06
1 Properties / Services
1.1 Application
The CP 343-1 Lean communications processor is intended for operation in a
SIMATIC S7-300 or SIMATIC C7 automation system. It allows attachment of the
S7-300 to Industrial Ethernet and supports PROFINET IO.
To integrate the CP in a linear bus or ring, to connect a further Ethernet device or
to use PROFINET media redundancy, a 2-port real time ERTEC switch with
autocrossing, autonegotiation and autosensing was integrated in the CP.
1.2 Communication services
The CP supports the following communication services:
S PROFINET IO
PROFINET IO allows direct access to IO devices over Industrial Ethernet.
− PROFINET IO device
Integration of the SIMATIC S7-300 programmable controller over the CP as
intelligent PROFINET IO device.
S S7 communication and PG/OP communication with the following functions:
− PG functions (including routing)
− Operator control and monitoring functions (HMI)
− Server for data exchange on S7 connections configured at one end only
without communication blocks on the S7-300 / C7-300 station
S Open communications services with the following functions:
− SEND/RECEIVE interface over ISO-on-TCP, TCP and UDP connections
UDP frame buffering on the CP can be disabled during configuration. When
necessary, this allows you to achieve a shorter reaction time between the
arrival of a UDP frame and its evaluation on the CPU.
− Multicast over UDP connection
The multicast mode is made possible by selecting a suitable IP address
when configuring connections.
− FETCH/WRITE services (server; corresponding to S5 protocol) over
ISO-on-TCP connections and TCP connections;
The addressing mode can be configured for FETCH/WRITE access as the
S7 or S5 addressing mode.
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