SINUMERIK operating mode
6.2 Networking
ITC V3, ITC V3 PRO
Operating Instructions, 03/2024, A5E42761061-AF
131
6.2.1.3 System boot with system network
System behavior at boot
The system boot behavior is based on the following principle:
• For the configuration of an NCU 17x0 with an IPC, the default for a network configuration
is as follows:
the NCU is assigned the preset IP address 192.168.214.1 on X120; the IPC is assigned the
preset IP address 192.168.214.241 on Eth2.
• For the configuration of more than one NCU 17x0 without IPC, with or without IPCs, a
distinction must be made between two cases:
– For the entire system, a DHCP master must be defined in the NCU/IPC intended for it.
– All address conflicts and DHCP conflicts are resolved automatically when booting and
the system is ready for operation. In this configuration, there is no guarantee that all
NCUs and IPCs will always receive the same IP address at each system boot.
– If there is a requirement that all NCUs and possibly also the IPC should be assigned a
certain IP address on each startup, the user must define this individually for each
affected NCU/IPC:
In the NCU, this is done with the file basesys.ini in directory /card/user/system/etc
On the IPC, this is done in the network settings (Control Panel) for Eth2.
• Assigning names:
– Assign meaningful names (host names) for all NCUs in the relevant basesys.ini file
otherwise the names will be generated automatically.
– An IPC always has a computer name, which you can change if required in the Control
Panel.
• The IP addresses of ITC, MCP/MPP, EKS, HT2, and HT10 are identified in the PLC via their
DIP switch settings. On HT2 and HT10, identification is achieved using the switch setting
in the connection box or in the connection module.
Using DNS name service
Availability of the DNS (Domain Name System) name service offers the following advantages
for system network administration:
• The name service enables easier configuration with names instead of IP addresses for
management of operating units: All components in the system network can be addressed
via a symbolic computer name. This name can to some extent be freely assigned, to some
extent it is derived automatically from a DIP switch setting (MCP, MPP, EKS, HT 10, HT 2).
• A computer node in the system network (NCU, IPC, ITC, MCP, HT 10, etc.) can be
addressed solely through assignment of the IP address, either via a freely selectable name
or via an internally generated name in the system network, and thus becomes
independent from its network address in the system network. Thus a change in the
network address does not necessarily necessitate a series of additional setting changes.
• In addition, the name service is used by the system for address resolution for MCP/MPP,
direct keys, and EKS when changing the user authorization.
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