Properties / services
1.4 Other services
CP 343-1 Lean
Manual, 10/2012, C79000−G8976−C198−07
11
● 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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