Siemens SIMATIC NET CP 343-1 Manuel D’Utilisation

B3L−5

CP 343-1 Lean for Industrial Ethernet / Manual Part B3L

Release 03/2007
C79000-G8976-C198-04

The CP 343−1 Lean communications processor is designed for operation in a
SIMATIC S7-300 programmable logic controller. It allows attachment of the
S7−300 to Industrial Ethernet and supports PROFINET IO.

A 2-port switch with autocrossing, autonegotiation and autosensing was integrated
in the CP for simple integration in a line or for attaching a further Ethernet device.

The CP supports the following communication services:

S 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 

− 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 S5 compatible communication with 

− SEND/RECEIVE interface over ISO-on-TCP, TCP and UDP connections
− 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) via

ISO-on-TCP connections and TCP connections;
The addressing mode can be configured for FETCH/WRITE access as the

S7 or S5 addressing mode.

− LOCK/UNLOCK with FETCH/WRITE services;