Open User Communication; Overview Of Open User Communication - Siemens SIMATIC ET 200AL System Manual

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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

• 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, see also Secure Open User Communication (Page 73).

• Open User Communication is possible in various automation systems, see technical

specifications of the respective manuals.

– Integrated PROFINET / Ind. Ethernet interfaces of CPUs (S7-1500, ET 200SP CPU,

– PROFINET / Ind. Ethernet interfaces of communications modules (for example

Information on Secure Open User Communication is available in the section Secure

Communication (Page 40).

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 407).

S7-1500 Software Controller, CPUs 1513/1516pro 2 PN)

CP 1543-1, CM 1542-1, CP 1543SP-1)

Function Manual, 05/2021, A5E03735815-AJ

Communication

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