Siemens SIMATIC S7-1200

Easy to communicate between devices
7.5 PROFINET
Easy Book
Manual, 03/2014, A5E02486774-AF
133
7.5
PROFINET
7.5.1
Open user communication
The integrated PROFINET port of the CPU supports multiple communications standards
over an Ethernet network:
● Transport Control Protocol (TCP)
● ISO on TCP (RFC 1006)
● User Datagram Protocol (UDP)
Table 7- 2 Protocols and communication instructions for each
Protocol
Usage examples
Entering data in the
receive area
Communication
instructions
Addressing type
TCP CPU-to-CPU
communication
Transport of frames
Ad hoc mode Only TRCV_C and
TRCV
Assigns port numbers to
the Local (active) and
Partner (passive)
devices
Data reception with
specified length
TSEND_C, TRCV_C,
TCON, TDISCON,
TSEND, and TRCV
ISO on TCP CPU-to-CPU
communication
Message
fragmentation and re-
assembly
Ad hoc mode Only TRCV_C and
TRCV
Assigns TSAPs to the
Local (active) and
Partner (passive)
devices
Protocol-controlled TSEND_C, TRCV_C,
TCON, TDISCON,
TSEND, and TRCV
UDP CPU-to-CPU
communication
User program
communications
User Datagram Protocol TUSEND and TURCV Assigns port numbers to
the Local (active) and
Partner (passive)
devices, but is not a
dedicated connection
S7 communication CPU-to-CPU
communication
Read/write data
from/to a CPU
Data transmission and
reception with specified
length
GET and PUT Assigns TSAPs to the
Local (active) and
Partner (passive)
devices
PROFINET RT CPU-to-PROFINET
IO device
communication
Data transmission and
reception with specified
length
Built-in Built-in