Siemens SINUMERIK 840D sl Function Manual page 1059

DB19 DBB123
DB19 DBB124
OFFL_REQ_PLC (1)
OFFL_CONF_PLC (2)
OFFL_REQ_OP (3)
OFFL_CONF_OP (4)
S_ACT (6)
OFFL_REQ_FOC (7)
OFFL_CONF_FOC (8)
ONL_REQ_FOC (9)
ONL_PERM_FOC (10)
DB19 DBB125
DISC_FOC (9)
OK (10)
CONNECT (11)
PLC_LOCKED (14)
PRIO_H (15)
Bit signals
DB19
DBX 126.0
Data Block
Edge evaluation: No
Signal state 1 or
edge change
0 → 1
Signal state 0 or
edge change
1 → 0
Extended Functions
Function Manual, 03/2009, 6FC5397-1BP10-4BA0
Several Operator Panels on Several NCUs, Distributed Systems
MMC1_MSTT_ADR
refer to PAR_ MSTT_ADR
After issuing positive online permission, the PLC transfers the HMI parameters to
the online interface PAR_ MSTT_ADR -> MMC1_MSTT_ADR
MMC1_STATUS
Requests from online HMI to PLC or vice-versa. The meaning of the signal is
dependent on MMC1_Z_INFO
PLC to HMI: PLC wants to displace control unit by offline request.
HMI to PLC: Acknowledgement of OFFL_REQ_PLC
HMI to PLC: Control unit would like to go offline from this NCU and outputs an
offline request
PLC to HMI: Acknowledgement of OFFL_REQ_OP
HMI to PLC: Control unit goes online or changes operating focus
HMI to PLC: Control unit would like to take operating focus away from this NCU
PLC to HMI: Acknowledgement of OFFL_REQ_FOC
HMI to PLC: Control unit would like to set operating focus to this NCU
PLC to HMI: Acknowledgement of ONL_REQ_FOC
MMC1_Z_INFO
Request from online HMI to PLC or vice-versa. The meaning of the signal is
dependent on MMC1_STATUS
Control unit switches operating focus to another NCU.
Positive acknowledgement
Control unit has gone online on this NCU.
The control unit switchover disable is set in the HMI-PLC interface. Control unit
cannot go offline from this NCU or change operating focus.
Control units with a higher priority are operating on this NCU. Requesting control
unit cannot go online to this NCU
MMC1_SHIFT_LOCK
Disable/enable control unit switchover
Signal(s) updated: Cyclic
Control unit switchover or change in operating focus is disabled.
The current control unit-NCU constellation remains unchanged.
Control unit switchover or change in operating focus is enabled
NC/PLC Interface Signals (Z2)
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