Z2: NC/PLC interface signals
18.2 Distributed systems (B3)
Extended Functions
852 Function Manual, 03/2013, 6FC5397-1BP40-3BA1
Sign of life of M:N switchover
DB19 DBW110 M_TO_N_ALIVE
1 ... 65535 Ring counter that is cyclically incremented by the PLC. Indicator for the HMI that
the M:N switchover is active and ready.
1. HMI/PLC online interface
DB19 DBW120 MMC1_CLIENT_IDENT
refer to PAR_CLIENT_IDENT
after issuing positive online permission, the PLC transfers the HMI parameters to
the online interface PAR_CLIENT_IDENT -> MMC1_CLIENT_IDENT
DB19 DBB122 MMC1_TYP
refer to PAR_MMC_TYP
After issuing positive online permission, the PLC transfers the HMI parameters to
the online interface PAR_MMC_TYP -> MMC1_TYP
DB19 DBB123 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
DB19 DBB124 MMC1_STATUS
Requests from online HMI to PLC or vice-versa. The meaning of the signal is
dependent on MMC1_Z_INFO
OFFL_REQ_PLC (1) PLC to HMI: PLC wants to displace control unit by offline request.
OFFL_CONF_PLC (2) HMI to PLC: Acknowledgement of OFFL_REQ_PLC
OFFL_REQ_OP (3) HMI to PLC: Control unit would like to go offline from this NCU and outputs an
offline request
OFFL_CONF_OP (4) PLC to HMI: Acknowledgement of OFFL_REQ_OP
S_ACT (6) HMI to PLC: Control unit goes online or changes operating focus
OFFL_REQ_FOC (7) HMI to PLC: Control unit would like to take operating focus away from this NCU
OFFL_CONF_FOC (8) PLC to HMI: Acknowledgement of OFFL_REQ_FOC
ONL_REQ_FOC (9) HMI to PLC: Control unit would like to set operating focus to this NCU
ONL_PERM_FOC (10) PLC to HMI: Acknowledgement of ONL_REQ_FOC
DB19 DBB125 MMC1_Z_INFO
Request from online HMI to PLC or vice-versa. The meaning of the signal is
dependent on MMC1_STATUS
DISC_FOC (9) Control unit switches operating focus to another NCU.
OK (10) Positive acknowledgement
CONNECT (11) Control unit has gone online on this NCU.
PLC_LOCKED (14) The control unit switchover disable is set in the HMI-PLC interface. Control unit
cannot go offline from this NCU or change operating focus.
PRIO_H (15) Control units with a higher priority are operating on this NCU. Requesting control
unit cannot go online to this NCU
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