System overview
4.4 CPUs
Automation system
System Manual, 01/2023, A5E03461182-AK
63
You can find more information about security mechanisms of the SIMATIC automation
systems in the Security with SIMATIC S7 controllers
(https://support.industry.siemens.com/cs/ww/en/view/77431846) document and in the
Communication (https://support.industry.siemens.com/cs/ww/en/view/59192925) function
manual.
Secure Communication
It is becoming increasingly necessary to transfer data to external computers in encrypted
form via Intranet or public networks.
SIMATIC S7-1500 CPUs and ET 200 CPUs with firmware version 2.0 and higher support the
Internet PKI (RFC 5280) with STEP 7 as of V14. This makes the configuration and the
operation of Secure Communication possible, for example:
• Hypertext Transfer Protocol Secure (HTTPS)
• Secure Open User Communication
• Secure Communication with OPC UA
A public key infrastructure (PKI) can issue, distribute and check digital certificates. For
S7-1500 CPUs, you create certificates for various applications in the CPU properties in STEP 7,
for example: TLS certificates for Secure Open User Communication, Web server certificates,
OPC UA certificates.
With STEP 7 and WinCC as of Version V17, SIMATIC S7-1500 CPUs and ET 200 CPUs from
firmware version 2.9 support innovated and standardized secure PG/PC and HMI
communication – referred to as Secure PG/HMI communication for short.
Communications processors with integrated security functions
For special requirements of your plant, use communications processors with integrated
security functions, such as access protection using a firewall, protection against data
manipulation using VPN, FTPS, HTTPS, SNMPv3 and secure NTP.
Advantages and customer benefits
The protection functions listed above protect your investments from unauthorized access and
manipulation, helping to secure plant availability.
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