Siemens SINUMERIK 840D sl Function Manual page 77

● Operating focus
At any one time, only one of the operator stations on the PCU that are online, can have the
operating focus. Entries with regard to the user interface can only be made via this operator
station. The user interfaces on the other online operator stations are darkened to indicate
that they do not have operating focus. Only a message is displayed on operator stations
that are not online.
The operating focus can be switched between the online operator stations.
● HT8 handheld unit
A HT8 handheld unit combines a TCU, an operator panel front and a machine control panel
in a single device.
M: PCU 50.x with SINUMERIK Operate
Several operator stations and several NCU 7x0.3 PN can be connected to a PCU 50.x with
SINUMERIK Operate user interface. The data of the channels of different NCUs can be
displayed on the operator stations through suitable configuring of the channel menu.
Note
Currently, only one PCU per T:1:N network can be configured ⇒ M = 1
N: SINUMERIK 840D sl, NCU 7x0.3 PN
● Internal SINUMERIK Operate user interface
Because of the existing external SINUMERIK Operate user interface on PCU 50.x in the
system network, the NCU-integrated internal SINUMERIK Operate user interface must be
switched off. The internal SINUMERIK Operate user interface must not be switched off only
when it is used with a limited range of functions, exclusively within the scope of tool
management. Detailed information on this can be found in the Commissioning Manual
"Operator Components and Networking (IM5)", Section "Network configuration" >
"Application example"
● Machine control panel (MCP)
For a flexible switchover of the machine control panels, only one MCP can be connected
to one NCU. The switchover of the MCPs is user-specifically via the PLC user program
(function block FB 9).
Installation and connection
References
● TCU, MCP, PCU:
SINUMERIK 840D sl Operator Components and Networking Manual
● NCU:
SINUMERIK 840D sl NCU 7x0.3 PN Manual
● Machine control panel (MCP)
FB 9: MtoN Control Unit Switchover
● Switch SCALANCE:
Communication with SIMATIC System Manual
Extended Functions
Function Manual, 10/2015, 6FC5397-1BP40-5BA3
B3: Distributed systems - 840D sl only
3.1 Brief description
77