Siemens SINUMERIK 840D sl Commissioning Manual page 826

Configuring the system
2.3 Configuration file "basesys.ini"
; If DisableCompanyNet is set to 1, the whole interface will
; be disabled.
;DisableCompanyNet=1
; If ExternalIP is set, you can force the external Ethernet
; interface to use a fixed IP address etc. instead of using DHCP
; if a Hostname is set, it even overrides one received by DHCP
;ExternalIP=210.210.210.210;ExternalNetMask=255.255.255.0;Gateway=210.210.210.1;Names
ervers=210.210.210.1
210.210.210.2;Timeservers=210.210.210.3;Hostname=somename;Domain=example.com
; if ExternalIP is empty (default), DHCP is used with the following
; ClientID the default is "@MAC" to use the MAC address,
; alternatives are "@NAME" to use the hostname (Hostname above)
; "@CFID" to use the ID of the CF card if one is available
; (like on X120), or any other arbitrary string
;DHCPClientID=@MAC
[InternalInterface]
; If DisableSysNet is set to 1, the whole interface will
; be disabled
;DisableSysNet=1
; With InternalIP and InternalNetMask (both must be set together), you
; can change the address on the internal/TCU/automation/system net.
;InternalIP=192.168.214.1;InternalNetMask=255.255.255.0
; These two can define an alias IP for X120.
;InternalIP_Alias=192.168.216.1;InternalNetMask_Alias=255.255.255.0
; This defines a "name of station" for ProfiNet (ERTEC interface)
; for use with DCP, default is the normal hostname.
; Please be careful if a PN-Name can also be set by other means,
; for example by NCU-Link. Usually it is not needed to define
; a name here.
;PN_StationName="PN_IO"
; Setting EnableDHCPD_SysNet to 0 suppresses that a DHCP server is started on
; that interface
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Commissioning Manual, 03/2013, 6FC5397-1DP40-3BA1
NCU operating system (IM7)