Interfaces In Db19 For M:n - Siemens SINUMERIK 840D sl Function Manual

Z2: NC/PLC interface signals
19.2 Distributed systems (B3)
Name: Status
S_ACT
S_ACT
OFFL_REQ_FOC
OFFL_CONF_FOC
OFFL_CONF_FOC
ONL_REQ_FOC
ONL_PERM_FOC
ONL_PERM_FOC
19.2.2

Interfaces in DB19 for M:N

The HMI/PLC interface in DB19 is divided into three areas.
Online request interface
The online request sequence is executed on this interface if a control unit wants to go online.
HMI writes its client ID to ONL_REQUEST and waits for the return of the client ID in
ONL_CONFIRM.
After the positive acknowledgement from the PLC, the control unit sends its parameters and
waits for online permission (in PAR_STATUS, PAR_Z_INFO).
HMI parameter transfer:
Client identification -> PAR_CLIENT_IDENT
HMI type -> PAR_MMC_TYP
MCP address -> PAR_MSTT_ADR
With the positive online permission, the PLC also sends the number of the HMI-PLC online
interface DBB109.4-7 to be used by the control unit.
The MMC then goes online and occupies the online interface assigned by the PLC.
Online interfaces
Two control units can be connected online to one NCU at the same time.
888
Z_INFO Meaning
The requesting control unit has gone online.
CONNECT
The PLC now activates HMI sign-of-life monitoring.
Server HMI has disconnected the operating focus from this NCU.
DISC_FOCUS
Server HMI would like to disconnect the operating focus from this NCU
Set
and outputs an offline focus request.
PLC positively acknowledges the offline focus request.
Set
Server HMI can disconnect operating focus.
PLC negatively acknowledges the online focus request.
PLC_LOCKED
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.
Server HMI would like to set the operating focus on this NCU and
Set
outputs an online focus request.
PLC positively acknowledges the online focus request.
Set
Server HMI then connects operating focus to this NCU.
PLC negatively acknowledges the online focus request. User has set
PLC_LOCKED
HMI switchover disable, server HMI cannot set operating focus,
MMCx_SHIFT_LOCK = TRUE,
x=1 or 2, first or second HMI-PLC interface.
Function Manual, 10/2015, 6FC5397-1BP40-5BA3
Extended Functions