Siemens SINUMERIK 840D sl Function Manual

Also see for SINUMERIK 828D Turning: Diagnostic manual Function manual Equipment manual Programming manual Operating manual

FALSE MCP2 is not readyTRUE MCP2 is readyDB10 DBX104.2 HHU readyFALSE HHU is not readyTRUE HHU is readyDB10 DBX108.3 E_MMCBTSSReadyFALSE No control unit online to OPITRUE Control unit online to OPIDB10 DBX108.2 E_MMCMPIReadyFALSE No control unit online to MPITRUE Control unit online to MPISecond HMI/PLC online interfaceThis interface utilizes a group signal for both bus types. No distinction is made between OPIand MPI.DB10 DBX108.1 E_MMC2ReadyFALSE no control unit online to OPI or MPITRUE Control unit online to OPI or MPIThe sign-of-life monitor is switched on by the PLC as soon as a control unit has gone onlineto its interface and switched off again when it goes offline.Sign-of-life monitoring will be enabled:as soon as control unit or HMI logs on online to its HMI/PLC interface with S_ACT/CONNECT.Sign-of-life monitoring will be disabled:as soon as control unit goes offline.1. HMI wants to switchover and log off from PLC with OFFL_REQ_OP/OK2. PLC acknowledges to HMI with OFFL_CONF_OP/OK3. Control unit or HMI will be displaced by PLC with OFFL_REQ_PLC/OKHMI acknowledges to PLC with OFFL_CONF_PLC/OKIn both instances the PLC detects that a control unit is going offline and waits for the TRUE-FALSE edge of its HMI sign-of-life signal.The PLC then ceases to monitor the sign-of-life signal.19.2.3 Signals from NC (DB10)DB10DBX107.6 NCU link activeEdge evaluation: Signal(s) updated:Signal state 1 or edgechange 0 → 1NCU link communication is active.Signal state 0 or edgechange 1 → 0No NCU link communication is active.Z2: NC/PLC interface signals19.2 Distributed systems (B3)Extended Functions894 Function Manual, 10/2015, 6FC5397-1BP40-5BA3