Siemens SIMATIC NET CP 343-1 Manuel d'utilisateur télécharger pdf (Page 11)

Properties / services

1.4 Other services

CP 343-1 Lean

Manual, 10/2012, C79000−G8976−C198−07

● 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 S7300 / C7300 station

● Open communication services with the following functions:

– SEND/RECEIVE interface ISOonTCP, 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) via ISO-on-TCP

connections and TCP connections

The addressing mode can be configured for FETCH/WRITE access as S7 or S5

addressing mode.

– LOCK/UNLOCK with FETCH/WRITE services

– Connection diagnostics from the user program

1.4 Other services

The CP also provides the following additional services:

● Media redundancy (MRP)

Within an Ethernet network with a ring topology, the CP supports the media redundancy

protocol MRP. You can assign the role of MRP client to the CP.

● Time-of-day synchronization over Industrial Ethernet

Time-of-day synchronization can be configured in the following modes:

– SIMATIC mode

The CP receives MMS time messages and synchronizes its local time and the time of

the CPU.

Accuracy approx. +/- 1 second

You can choose whether or not the time of day is forwarded. The forwarding direction

can also be selected (station > LAN or LAN > station).

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Siemens SIMATIC NET CP 343-1 Manuel d'utilisateur Page 11