Thin Client Unit (Tcu) - Siemens SINUMERIK 840D sl Equipment Manual

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 8, HT 2).
• A computer node in the system network (NCU, PCU, TCU, MCP, HT 8, 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.
4.3.1.3

Thin Client Unit (TCU)

TCU overview
The Thin Client Unit (TCU) for the distributed configuration permits spatial separation of the
SINUMERIK operator panel front (OP/TP) and the SINUMERIK PCU or NCU. On the SINUMERIK
solution line, the TCU is used to display the user interface of the PCU 50 or the NCU.
It is possible to connect one TCU to several PCUs/NCUs. All TCUs and PCUs/NCUs that are
connected to one another via a switch form the "system network". The user interface of a
PCU/NCU is copied to several OPs with one TCU each. In other words, all of the TCUs display
the same screen. Operator actions can only be performed on one TCU at a time. This TCU
then has user authorization. The PCU can also have its own OP connected directly to it.
The following diagram shows a configuration example for a distributed topology:
The mobile SINUMERIK HT 8 handheld terminal works on the thin client principle and
combines the functions of an operator panel with a machine control panel.
The configuration and cabling of the whole plant system based on a permissible
configuration is described in the chapter 'Network configurations".
Handheld Terminal HT 8
Equipment Manual, 02/2024, A5E52918633B AA
General information and networking
4.3 Networking
39