Communication
Function Manual, 11/2019, A5E03735815-AH
65
6.1 Overview of Open User Communication
Features of Open User Communication
Through Open User Communication, also called "open communication", the CPU exchanges
data with another device capable of communication. Open User Communication has the
following features and characteristics:
● Open standard (communication partners can be two SIMATIC CPUs or a SIMATIC CPU
and a suitable third-party device).
● Communication via various protocols (in STEP 7 known as "Connection types")
● High degree of flexibility in terms of the data structures transferred; this allows open data
exchange with any communications devices as long as these support the connection
types available.
● Secure Communication: To protect your automation system, you can exchange data
securely over Open User Communication. With Secure Open User Communication, the
data is sent signed and encrypted.
● Open User Communication is possible in various automation systems, see technical
specifications of the respective manuals.
Examples:
– Integrated PROFINET / Ind. Ethernet interfaces of CPUs (S7-1500, ET 200SP CPU,
S7-1500 Software Controller, CPUs 1513/1516pro 2 PN)
– PROFINET / Ind. Ethernet interfaces of communications modules (for example
CP 1543-1, CM 1542-1, CP 1543SP-1)
Information on Secure Open User Communication is available in the section Secure
Communication (Page 34).
Information on S7-1500R/H
You can find information on Open User Communication with the S7-1500R/H redundant
system in section Communication with the redundant system S7-1500R/H (Page 324).
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