Network Configuration; Permissible Network Topologies - Siemens SINUMERIK 840D sl Equipment Manual

4.3.3

Network configuration

4.3.3.1

Permissible network topologies

Ethernet connection
A SINUMERIK 840 D sl can only be operated as a network within which the individual
components communicate with one another via Ethernet connections. This network must be set
up.
The individual components are factory-set so that the most frequently occurring standard
configurations can be operated without changing the settings related to the network.
Division into system network and company network
On the SINUMERIK solution line, the components are generally split into a company network on
the one hand and a system network on the other.
The connection to the company network provides access to the network drives, for example.
On the system network, process data communication and image transmission runs from the
components with operator software to the display units – the respective TCU.
This split is performed physically by means of the prescribed use of the Ethernet interfaces
on the components:
• A TCU is connected exclusively to the system network.
• An NCU is always connected to the system network via X120.
• Ethernet interface Eth 2 of the PCU is preconfigured for connection to the system network;
while Ethernet interface Eth 1 is used for connection to the company network.
• An NCU is connected to the company network via X130.
Meaning of the connections:
Green connection
Gray connection
Handheld Terminal HT 8
Equipment Manual, 02/2024, A5E52918633B AA
○ Eth 1 as a DHCP client
● Eth 2 as a DHCP server
■ Eth 2 with a fixed IP address
Uncrossed Ethernet cable
Crossed Ethernet cable (crossover)
General information and networking
4.3 Networking
77