Protocols For Open User Communication - Siemens SIMATIC S7-1500 Function Manual

Open User Communication

6.2 Protocols for Open User Communication

6.2 Protocols for Open User Communication
Protocols for Open User Communication
The following protocols are available for open communication:
Table 6- 1
Transport protocol
TCP according to RFC 793
ISO-on-TCP according to RFC 1006 (Class 4)
ISO according to ISO/IEC 8073
UDP according to RFC 768
FDL
Table 6- 2
Application protocol
Modbus TCP
E-mail
FTP
TCP, ISO-on-TCP, ISO, UDP
Prior to data transfer, these protocols (except UDP) establish a transport connection to the
communications partner. Connection-oriented protocols are used when potential loss of data
needs to be avoided.
The following is possible with UDP:
● Unicast to one device or broadcast to all devices on PROFINET via the PROFINET
interface of the CPU or the Industrial Ethernet interface of the CP 1543-1
● Multicast to all recipients of a multicast group via the PROFINET interface of the CPU* or
the PROFINET / Industrial Ethernet interface of the CP 1543-1
* As of firmware version V2.0, the PROFINET interface of the CPU supports a maximum of
5 multicast groups
Maximum user data length: You can find the maximum user data lengths supported in the
technical specifications of the respective device manuals.
66
Transport protocols for open communication
Application protocols for open communication
Via interface
PROFINET/Industrial Ethernet
PROFINET/Industrial Ethernet
Industrial Ethernet (only CP 1543-1)
PROFINET/Industrial Ethernet
PROFIBUS
Used transport protocol
TCP according to RFC 793
TCP according to RFC 793
TCP according to RFC 793
Function Manual, 11/2019, A5E03735815-AH
Communication