Z2: NC/PLC interface signals
18.2 Distributed systems (B3)
Extended Functions
848 Function Manual, 03/2013, 6FC5397-1BP40-3BA1
STATUS and Z_INFO can be combined as follows
Name: Status Z_INFO Meaning
OFFL_REQ_PLC Set
PLC wants to displace online control unit by offline request.
OFFL_CONF_PLC Set
Control unit positively acknowledges the offline request from PLC.
Control unit will subsequently go offline.
OFFL_CONF_PLC MMC_LOCKED
Control unit negatively acknowledges the offline request.
Control unit will not go offline, as processes are running that must
not be interrupted.
OFFL_REQ_OP Set
Control unit would like to go offline from the online NCU and outputs
an offline request.
OFFL_CONF_OP Set
PLC positively acknowledges the offline request.
Control unit will subsequently go offline from this NCU.
OFFL_CONF_OP PLC_LOCKED
PLC negatively acknowledges the offline request from control unit.
User has set the HMI switchover disable, control unit cannot go
offline, MMCx_SHIFT_LOCK = TRUE, x=1 or 2, 1st or 2nd HMI-PLC
interface.
ONL_PERM
No. of HMI-PLC online
interface,
OK
PLC issues the online enabling command to the requesting control
unit. Control unit can then go online to this NCU. Content of Z_INFO:
Bit 0 ..3: Set
Bit 4... 7: No. of HMI-PLC online interface with which the control unit
should connect:
First HMI-PLC online interface
Second HMI-PLC online interface
ONL_PERM MMC_LOCKED
The requesting control unit cannot go online.
Two control units on which uninterruptible processes are in progress
are connected online to this NCU. The PLC cannot suppress either
of the two control units.
ONL_PERM PLC_LOCKED
The requesting control unit cannot go online.
User has set HMI switchover disable, MMCx_SHIFT_LOCK = TRUE,
x=1 or 2, first or second HMI online interface.
ONL_PERM PRIO_H
The requesting control unit cannot go online.
Two control units that are both higher priority than the requesting
control unit are connected online to the NCU.
The PLC cannot suppress either of the two control units.
S_ACT CONNECT
The requesting control unit has gone online.
The PLC now activates HMI sign-of-life monitoring.
S_ACT DISC_FOCUS
Server HMI has disconnected the operating focus from this NCU.
OFFL_REQ_FOC Set
Server HMI would like to disconnect the operating focus from this
NCU and outputs an offline focus request.
OFFL_CONF_FOC Set
PLC positively acknowledges the offline focus request.
Server HMI can disconnect operating focus.
OFFL_CONF_FOC PLC_LOCKED
PLC negatively acknowledges the online focus request.
User has set HMI switchover disable, server HMI cannot disconnect
operating focus, MMCx_SHIFT_LOCK = TRUE,
x=1 or 2, first or second HMI-PLC interface.
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