Siemens SINUMERIK Series

Z2: NC/PLC interface signals
18.2 Distributed systems (B3)
Extended Functions
Function Manual, 03/2013, 6FC5397-1BP40-3BA1
847
Name Value Interface DB19 Meaning
ONL_PERM
5 Online request
interface
DBB108
PLC to control unit: PLC notifies control unit as to whether it
can go online or not.
The meaning of the signal is dependent on Z_INFO: DBB109
S_ACT
6 Online interfaces
1. : DBB124
2. : DBB134
Control unit to PLC: Control unit goes online or changes
operating focus.
The meaning of the signal is dependent on Z_INFO DBB125
or DBB135
OFFL_REQ_FOC
7 Online interfaces
1. : DBB124
2. : DBB134
Control unit to PLC: Control unit would like to take operating
focus away from this NCU
OFFL_CONF_FOC
8 Online interfaces
1. : DBB124
2. : DBB134
PLC to control unit: Acknowledgement of
OFFL_REQ_FOC
The meaning of the signal is dependent on Z_INFO DBB125
or DBB135
ONL_REQ_FOC
9 Online interfaces
1. : DBB124
2. : DBB134
Control unit to PLC: Control unit would like to set operating
focus to this NCU
ONL_PERM_FOC
10 Online interfaces
1. : DBB124
2. : DBB134
PLC to control unit: Acknowledgement of
ONL_REQ_FOC
The meaning of the signal is dependent on Z_INFO DBB125
or DBB135
Z_INFO
Name Value Interface DB19 Meaning
DISC_FOC
9 DBB125
DBB135
Control unit switches operating focus to another NCU.
Set
10 DBB109 Bit 0-3
DBB125
DBB135
Positive acknowledgement
CONNECT
11 DBB125
DBB135
Control unit has gone online on this NCU.
MMC_LOCKED
13 DBB109 Bit 0-3
DBB125
DBB135
HMI has set switchover disable.
There are processes running on this control unit that may not
be interrupted by a switchover.
PLC_LOCKED
14 DBB109 Bit 0-3
DBB125
DBB135
The HMI switchover disable is set in the HMI-PLC interface.
Control unit cannot go offline from this NCU or change
operating focus.
PRIO_H
15 DBB109 Bit 0-3
DBB125
DBB135
Control units with a higher priority are operating on this NCU.
Requesting control unit cannot go online to this NCU.