B3: Distributed systems - 840D sl only2.1 Brief descriptionExtended FunctionsFunction Manual, 03/2013, 6FC5397-1BP40-3BA1 73N: SINUMERIK 840D sl, NCU 7x0.3 PN● Internal SINUMERIK Operate user interfaceBecause of the existing external SINUMERIK Operate user interface on PCU 50.x in thesystem network, the NCU-integrated internal SINUMERIK Operate user interface must beswitched off. The internal SINUMERIK Operate user interface must not be switched offonly when it is used with a limited range of functions, exclusively within the scope of toolmanagement. 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 connectedto one NCU. The switchover of the MCPs is user-specifically via the PLC user program(function block FB 9).Installation and connectionReferences● 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 ManualConfiguration, commissioning and parameter assignmentReferences● Structure of the system network and commissioning of a TCU:Operator Components and Networking Commissioning Manual (IM5)● Configuration of the channel menuSINUMERIK Operate Commissioning Manual (IM9), Section "Channel menu"ProgrammingReferences● MCP:Basic Functions Function Manual, Section "P3 Basic PLC program for SINUMERIK 840Dsl" > "Block descriptions" > "FB 9: MtoN control unit switchover"