Properties / services
1.3 Communication services
CP 343-1
Manual, 10/2012, C79000−G8976−C201-07
11
– Shared device
Individual submodules of the CP as 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 71).
● S7 communi
cation and PG/OP communication with the following functions:
– PG functions (including routing)
– Operator control and monitoring functions (HMI)
Multiplexing TD/OP connections
– Client and server for data exchange via communication blocks on S7 connections
configured at both ends.
Note
Blocks for S7 communication (see also STEP 7 online help or the "System Software
for S7-300/400 System and Standard Functions" manual):
BSEND FB 12
BRCV FB 13
PUT FB 14
GET FB 15
USEND FB 8
URCV FB 9
C_CNTRL FC 62
– 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 over ISO transport connections, 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 transport
connections, ISOonTCP 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
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