Signals From Nc (Db10) - Siemens SINUMERIK 840D sl Function Manual

Z2: NC/PLC interface signals
19.2 Distributed systems (B3)
FALSE
TRUE
DB10 DBX104.2
FALSE
TRUE
DB10 DBX108.3
FALSE
TRUE
DB10 DBX108.2
FALSE
TRUE
Second HMI/PLC online interface
This interface utilizes a group signal for both bus types. No distinction is made between OPI
and MPI.
DB10 DBX108.1
FALSE
TRUE
The sign-of-life monitor is switched on by the PLC as soon as a control unit has gone online
to 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/OK
2. PLC acknowledges to HMI with OFFL_CONF_OP/OK
3. Control unit or HMI will be displaced by PLC with OFFL_REQ_PLC/OK
HMI acknowledges to PLC with OFFL_CONF_PLC/OK
In 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)

DB10
DBX107.6
Edge evaluation:
Signal state 1 or edge
change 0 → 1
Signal state 0 or edge
change 1 → 0
894
MCP2 is not ready
MCP2 is ready
HHU ready
HHU is not ready
HHU is ready
E_MMCBTSSReady
No control unit online to OPI
Control unit online to OPI
E_MMCMPIReady
No control unit online to MPI
Control unit online to MPI
E_MMC2Ready
no control unit online to OPI or MPI
Control unit online to OPI or MPI
NCU link active
Signal(s) updated:
NCU link communication is active.
No NCU link communication is active.
Function Manual, 10/2015, 6FC5397-1BP40-5BA3
Extended Functions