Several Operator Panel Fronts And Ncus With Control Unit Management Option; Hardware Structure; Properties - Siemens SINUMERIK 840D sl Function Manual

B3: Several operator panels connected to several NCUs, distributed systems - only 840D sl
2.2 Several operator panel fronts and NCUs with control unit management
2.2 option
The following section provides a detailed description of the preparations and implementation
of the operating steps for the M:N concept.
Proceed as follows
1. Defining the configuration:
2. Control unit switchover function in the PLCs of the relevant NCUs. Control unit switchover
3. Dynamic properties (such as online/offline states) can be changed during runtime within
2.2.1

Hardware structure

As described in Section "Short Description", a complex system can consist of M control units
and N NCUs.
The hardware components are connected to one another via the bus (MPI and/or OPI). The
relationships between the bus nodes (identification, properties, assignment and switchover)
are software-controlled.
2.2.2

Properties

Client identification
The assignment between bus nodes and the bus system is static and cannot be changed
during runtime. It is configured once in the file NETNAMES.INI.
The client identification (CLIENT_IDENT) which the control unit uses for logging on to an
NCU in order to set up an online connection is composed of the bus type and bus address.
Extended Functions
Function Manual, 09/2009, 6FC5397-1BP20-0BA0

2.2 Several operator panel fronts and NCUs with control unit management option

– On the hardware side: by interconnecting components via bus systems
– On the software side: Configuration of the static properties with the help of
configuration file NETNAMES.INI (see below). These static properties become
effective on power up and cannot be changed during runtime.
is included with the Toolbox and comprises several blocks. They perform the following
tasks:
– Checking of switchover conditions
– Priority-based suppression
– Switchover
the limits specified by the NETNAMES.INI file.
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