Configuration, programming
4.6 DNS configuration
CP 1543-1
42 Operating Instructions, 12/2019, C79000-G8976-C289-08
4.6 DNS configuration
DNS server
A DNS server may be required when the module itself, a communications partner, or for
example an FTP server should be reachable via the host name (FQDN). If you specify the
address of a device as FQDN, you need to configure a DNS server. In this case, the IP
address of the device is determined via the configured DNS server.
Max. 3 DNS servers can be configured for the CP. The 4th configured DNS server is not
evaluated.
4.7 FTP communication
FTPS access only with security functions enabled
FTPS access to the S7-1500 station as an FTP server is only possible if a user with suitable
rights has been created in the STEP 7 project. This means that the security functions must
be enabled on the CP. For this, security settings are available in the global user
administration.
4.7.1 FTP server
4.7.1.1 Configuring the FTP server function
CP configuration
Configure the FTP server function of the CP in the following parameter group.
● With security functions disabled: "FTP server configuration"
● With security functions enabled: "Security > FTP server configuration"
Requirements in the CPU configuration and programming
Use the following settings to allow FTP access:
● In the CPU configuration in "Protection & Security > Connection mechanisms":
Disable the option "Access via PUT/GET communication...".
● As file DBs create data blocks of the type "Array of byte".
Only for CP 1543-1 with firmware version ≤ V2.0:
● For all data blocks being used as file DBs, disable the "Optimized block access" attribute.
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