Open User Communication
6.4 Open User Communication with addressing via domain names
Communication
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Function Manual, 05/2021, A5E03735815-AJ
Setting up communication via DNS
The DNS client of the CPU must know the IPv4 address of at least one DNS server so that a
CPU can establish a connection to a communication partner via its domain name. The CPU
supports up to 4 different DNS servers.
To set up communication via domain names for an S7-1500 CPU, follow these steps:
1.
Select the CPU in the network view of STEP 7.
2.
In the Inspector window, navigate to "Properties" > "General" > "Advanced configuration" >
"DNS configuration".
3.
Enter the IPv4 address of a DNS server in the "DNS server addresses" column of the "Server
list" table.
You can enter up to 4 IPv4 addresses of DNS servers.
Figure 6-1
Entering DNS server addresses using a CPU 1516-3 PN/DP as an example
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