Functions - Siemens SINUMERIK 840D sl Function Manual

B3: Several operator panels connected to several NCUs, distributed systems - only 840D sl
2.1.3.2

Functions

Switchover of link to another NCU with the softkey labeled "Connections"
A menu appears in which you can select the connections conn_1, ... conn_n (declared in
NETNAMES.INI) via softkeys.
The name (name=...) allocated to the connection in NETNAMES.INI is displayed on the
softkeys.
A connection to the new NCU is confirmed by pressing a softkey.
Switchover behavior on OP030
It is not possible to switch over to another bus node online. The connection contained in
NETNAMES.INI is permanently configured.
HMI Embedded switchover behavior
The "Connections" softkey is only displayed if more than one link is configured in
NETNAMES.INI. When changing to the new NCU, the existing connection to another NCU is
interrupted.
HMI applications must no longer need a connection to the previous NCU at the time of link
switchover (e.g. for active data backup via V.24 interface). Otherwise the control will issue a
message if the connection is required.
HMI behavior with respect to the NCU to which it is switching over is the same way as after a
restart, i.e. it is in the operating area which is defined as the start operating area.
HMI Advanced switchover behavior
The "Connections" softkey is only displayed if the "M:N" function is activated on the control.
The "M:N" function is activated in the "Commissioning/HMI/Operator panel" menu.
Connections are maintained during the switchover process, and the applications which are
using these connections also remain active. After the switchover, the HMI is in the same
operating area with respect to the new NCU as it was previously with respect to the other
NCU.
Possible faults
The NCU with which the connection is to be set up can reject the connection setup. Reason:
NCU faulty or the NCU cannot operate any additional control units at this time.
Machine data MD10134 $MN_MM_NUM_MMC_UNITS (number of possible simultaneous
HMI communications partners) contains the setting which defines how many control units
can be processed by an NCU at one time.
The OP030 uses one unit. A PCU, as supplied, uses two units. Other units (up to 12) are
required for larger OEM packages.
Extended Functions
Function Manual, 09/2009, 6FC5397-1BP20-0BA0
2.1 Brief description
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