Siemens Simatic S7-300 - Communication Services

Properties / services
1.3 Communication services
CP 343-1 Lean
Equipment Manual, 01/2023, C79000−G8976−C198−09
13
1.3 Communication services
The CP supports the following communication services:
• PROFINET IO
PROFINET IO allows direct access to IO devices over Industrial Ethernet.
– PROFINET IO device
Integration of the SIMATIC S7-300 automation system via the CP as an intelligent
PROFINET IO device (I-device).
– Shared device
Individual submodules of the CP (IO device) can be assigned up to two PROFINET IO
controllers in STEP 7 V5.5.
Note the information on configuring PROFINET IO systems with shared IO devices in
the "PROFINET System Description", see references, /13/ (Page 76).
• 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