Siemens SINUMERIK 840D sl Function Manual page 1012

NC/PLC interface signals (Z2)
19.2 Several Operator Panels on Several NCUs, Distributed Systems
Name
ONL_REQ_FOC
ONL_PERM_FOC
Z_INFO
Name
DISC_FOC
Set
CONNECT
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
1012
Value Interface DB19
9 Online interfaces
1. : DBB124
2. : DBB134
10 Online interfaces
1. : DBB124
2. : DBB134
Value Interface DB19
9 DBB125
DBB135
10 DBB109 Bit 0-3
DBB125
DBB135
11 DBB125
DBB135
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
Meaning
Control unit to PLC: Control unit would like to set operating
focus to this NCU
PLC to control unit: Acknowledgement of ONL_REQ_FOC
The meaning of the signal is dependent on Z_INFO DBB125
or DBB135
Meaning
Control unit switches operating focus to another NCU.
Positive acknowledgement
Control unit has gone online on this NCU.
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
operating 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.
Function Manual, 01/2008, 6FC5397-1BP10-3BA0
Extended Functions