Properties / Services; Use; Communications Services - Siemens SIMATIC NET S7-300 - PROFIBUS Equipment Manual

Properties / services

1.1

Use

Automation system
The CP 343-5 communications processor is intended for operation in a SIMATIC S7-300 /
C7-300 automation system. It allows connection of the S7-300 / C7-300 to a PROFIBUS
fieldbus system.
1.2

Communications services

Supported communications services
In its current configuration, the CP 343-5 supports the following communications services:
• PROFIBUS FMS (complying with EN 50170, FMS client and server function)
As FMS master for the following connection types:
– MMAZ: Master-master acyclic
– MSAZ: Master-slave acyclic
– MSAZ_SI: Master-slave acyclic with slave initiative
– MSZY: Master-slave cyclic
– BRCT (Broadcast): Send to all FMS subscribers
• S7 communication and PG/OP communication
– PG functions with uploading/downloading of FM modules, configuration/diagnostics
– Operator control and monitoring functions (HMI)
– Server for data exchange on connections configured at one end only without
• S5-compatible communication (SEND/RECEIVE interface) over FDL connections of the
following type:
– Specified FDL connections
– Free Layer 2 connections (SDA, SDN)
– Broadcast
– Multicast
The services of the CP 343-5 listed above can be used independently of one another at the
same time.
CP 343-5
Equipment Manual, 05/2023, C79000-G8976-C160-04
and routing
communication blocks in the S7 station
1
9