Siemens SINUMERIK 840D sl Equipment Manual page 41

Pre-configuration of the PCU
A PCU has two Ethernet interfaces with default settings suitable for use with SINUMERIK solution
line:
Eth 2
Preconfiguration of the NCU
On the X120, the NCU is preconfigured for the SINUMERIK DHCP protocol. The NCU is pre-
selected here as a SINUMERIK DHCP server. On X120, the NCU occupies the fixed IP address
192.168.214.1 with the subnet mask 255.255.255.0 in its capacity as a DHCP server. The DHCP
server of the NCU assigns IP addresses from the range 192.168.214.10 – 192.168.214.239 to
the DHCP clients. The behavior of the NCU on X120 cannot be modified.
Restricting the available address band that is managed by the DHCP server of the NCU frees
up IP addresses 192.168.214.2 to 192.168.214.9 as well as addresses 192.168.214.241 to
192.168.214.254 for network nodes with fixed IP addresses.
On X130, the NCU is set as a default DHCP client for the address reference from a company
network. The IP address received here is specified by the DHCP server from the company
network.
On X127, an NCU is a standard DHCP server (in contrast to the SINUMERIK DHCP
server). On X127, the NCU has the fixed IP address 192.168.215.1 with the subnet mask
255.255.255.224). The IP addresses 192.168.215.2 – 192.168.215.23 are dynamically
assigned to the DHCP clients. The range 192.168.215.24 - 192.168.215.30 is reserved, and
can be used by stations on the network with a fixed IP address, e.g. by a modem.
Reserved IP addresses for NCU and PCU
The following defaults apply on delivery:
• Connection to the system network with subnet mask 255.255.255.0:
IP address
192.168.214.1
192.168.214.2 – 9
Handheld Terminal HT 8
Equipment Manual, 02/2024, A5E52918633B AA
Eth 1 is pre-selected as a default DHCP client for connection to a
company network.
PCU
Eth 2 is pre-selected as a SINUMERIK DHCP server for connection to
a system network. On Eth 2 the fixed IP address 192.168.214.241
Eth 1
is pre-selected.
The NCU has three Ethernet connections:
- X120 to connect to the system network with an active DHCP server
(Eth 0)
- X130 to connect to the company network as a default DHCP client
(Eth 1)
- X127 as a service connection with an active DHCP server (Ibn 0)
Network station
NCU on X120
For additional NCUs with a fixed IP address on the
system network
General information and networking
4.3 Networking
Remark
Default
Unassigned
41