Siemens SINUMERIK 840D sl Manual page 82

General information and networking
1.4 Networking
Configuration 5: PCU with TCU on NCU
Description
In this configuration, a switch is also required for the system network. All components are
connected using straight Ethernet cables.
In terms of address allocation and the settings that need to be made, this configuration is
identical to that of configuration 4. However, in this case, the DHCP server of the NCU actually
supplies the TCU with an IP address and serves as a boot server for the TCU.
The observations made for configuration 3 also apply here in relation to the connection to the
company network. The connection to a switch on the company network is made via a straight
Ethernet cable.
To connect one TCU to both HMI systems you must create an additional connection to the
NCU for the TCU, as described in the following chapter:
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Operator panel front: OP 012
Manual, 09/2016, A5E36371591B