Siemens Simatic S7 Series

Communication
8.4 Ethernet
S7-200 SMART
System Manual, 09/2015, A5E03822230-AC
367
Note
The Station Name follows the standard DNS (Domain
Name System) naming
conventions. The S7
-200 SMART CPUs limit the Station Name to a maximum of 63
characters. The Station Name can consist of the lower case letters a through z, the
digits 0 through 9, the hyphen character (minus sign), and the period chara
cter.
Certain names are not allowed and this can depend on the tool used to set the Station
Name. The Station Name must not have the format "n.n.n.n" where n is a value of 0
through 999. The Station Name cannot begin with the string "port
-nnn" or the string
"port
-nnn-nnnnn" where "n" is a digit 0 through 9 (for example, "port-123" and "port-
123
-45678" are illegal). The Station Name cannot start or end with the hyphen or
period.
When you check the "IP address data is fixed to the values below and cannot be changed by
other means" checkbox in the system block dialog, the IP information that you enter for the
onboard Ethernet port is static. Static IP information must be downloaded to the CPU before
it is active in the CPU. If you want to change the IP information, this IP information can only
be changed in the system block dialog and once again downloaded to the CPU.
Note
If the "IP address data is fixed to the values below and cannot be changed by other means"
checkbox is checked, then the IP information cannot be set in the Communications dialog.
In order to use the SIP_ADDR instruction, the
"IP address data is fixed to the values below
and cannot be changed by other means" checkbox must be unchecked.