SINUMERIK operating mode
6.2 Networking
ITC V3, ITC V3 PRO
130 Operating Instructions, 03/2024, A5E42761061-AF
• Distributed memory media can be connected to the ITC via USB.
• The ITCs must be networked on the basis of the Gigabit standard, e.g. Gigabit switch or
Ethernet cable according to CAT 6 or higher.
6.2.1.2 Settings for SINUMERIK solution line
Fundamentals
The system network for SINUMERIK solution line is structured as a star topology with a central
Ethernet switch, to which all Ethernet-based components of the system are connected.
For an NCU, the connection is via the X120 Ethernet socket, for an IPC, it is via the "Ethernet
2" or "X2" or "X2 P1" connection. There is no default for all other components with two
Ethernet connections. These components have an internal 2-port switch and may be used to
connect an additional operator component. Thus, in this case, there can be deviations from
the strict star topology.
System network
In the system network, the IP address range 192.168.214.xxx with subnet mask
255.255.255.0 is pre-selected. Here there is precisely one DHCP server with DNS that can run
on one NCU or one IPC. The server ensures assignment of IP addresses to the Ethernet
components in the system network (DHCP clients) from a specified address band.
The following rules apply for assignment of IP addresses in the system network:
• For all NCUs and IPCs, the commissioning engineer assigns static IP addresses in the
associated address bands, as well as appropriate computer names (host names). All other
operator components are automatically assigned an IP address by the DHCP server. Its
name is generated automatically (for MCP, MPP, HT 10), or is entered during
commissioning (ITC).
• If there are multiple NCUs and/or IPCs in the system network, make sure that only one
DHCP server has "master priority".
That is the NCU or IPC in the system network that must be available on every system
startup so that it can perform the function of central DHCP and DNS server.
All other NCUs/IPCs with lower priority wait for a preset time while the system starts up
until the master is available.
Connection to a company network
Each NCU can be connected via X130, and each IPC can be connected via "Ethernet 1" to a
company network. The company network is used to exchange operating software with
servers or to execute part-programs directly from servers in the company network. The
company network and system network must not be interconnected via Ethernet switches.
Service interface X127
The service interface X127 of the NCU is used for direct connection of a PG/PC for service or
commissioning purposes. Here, access with the TIA Portal to the PLC and for NCU 17x0 is
possible.
With connection of a PG/PC to X127 it is absolutely necessary that the PG is operated as a
DHCP client.
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