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

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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.
1.4.1.3

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.
Operator panel front: OP 012
Manual, 09/2016, A5E36371591B
General information and networking
1.4 Networking
39

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