Siemens SINUMERIK 840D sl Function Manual

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NC/PLC interface signals (Z2)19.2 Several Operator Panels on Several NCUs, Distributed SystemsExtended Functions1020 Function Manual, 01/2008, 6FC5397-1BP10-3BA02nd HMI-PLC online interfaceThe signals of the 2nd HMI-PLC online interface are analogous in meaning to the signals ofthe 1st HMI-PLC online interface (MMC2_ ... replaces MMC1_...)..Sign-of-life monitoring HMIAfter a control unit has gone online to an NCU, the HMI sign of life is set in the interface.(E_BTSSReady, E_MMCMPI_Ready, E_MMC2Ready)The signals are automatically set by the HMI when the control unit goes online and stay setfor as long as it remains online.They are provided separately for each HMI-PLC interface and used by the PLC to monitorthe HMI sign of life.First HMI-PLC online interfaceA distinction between an control unit link via the OPI (1.5 Mbaud) or the MPI (187.5 kbaud) ismade on this interface.The signal corresponding to the bus type is set while the control unit is online.DB10 DBX104.0 MCP1 readyFALSE MCP1 is not readyTRUE MCP1 is readyDB10 DBX104.1 MCP2 readyFALSE 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 withS_ACT/CONNECT.