Siemens SINUMERIK 840D sl Function Manual page 887

Name
MMC_LOCKED
PLC_LOCKED
PRIO_H
STATUS and Z_INFO can be combined as follows
Name: Status
OFFL_REQ_PLC
OFFL_CONF_PLC
OFFL_CONF_PLC
OFFL_REQ_OP
OFFL_CONF_OP
OFFL_CONF_OP
ONL_PERM
ONL_PERM
ONL_PERM
ONL_PERM
Extended Functions
Function Manual, 10/2015, 6FC5397-1BP40-5BA3
Value Interface DB19
13 DBB109 Bit 0-3
DBB125
DBB135
14 DBB109 Bit 0-3
DBB125
DBB135
15 DBB109 Bit 0-3
DBB125
DBB135
Z_INFO
Set
Set
MMC_LOCKED
Set
Set
PLC_LOCKED
No. of HMI-PLC online
interface, OK
MMC_LOCKED
PLC_LOCKED
PRIO_H
Meaning
HMI has set switchover disable.
There are processes running on this control unit that may not
be interrupted by a switchover.
The HMI switchover disable is set in the HMI-PLC interface.
Control unit cannot go offline from this NCU or change operat‐
ing focus.
Control units with a higher priority are operating on this NCU.
Requesting control unit cannot go online to this NCU.
Meaning
PLC wants to displace online control unit by offline request.
Control unit positively acknowledges the offline request from PLC.
Control unit will subsequently go offline.
Control unit negatively acknowledges the offline request.
Control unit will not go offline, as processes are running that must not
be interrupted.
Control unit would like to go offline from the online NCU and outputs
an offline request.
PLC positively acknowledges the offline request.
Control unit will subsequently go offline from this NCU.
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 inter‐
face.
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
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.
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.
The requesting control unit cannot go online.
Two control units that are both higher priority than the requesting con‐
trol unit are connected online to the NCU.
The PLC cannot suppress either of the two control units.
Z2: NC/PLC interface signals
19.2 Distributed systems (B3)
887