Siemens PCS 7 Installation Manual page 41

Data communication
Download of the configuration data
Communication between the servers
Transmission of data processed by the servers to
the operator control and monitoring stations (cli‐
ents)
● System bus
Data communication
Download of the configuration data
Operating and monitoring of the processes
Communication between automation systems (SI‐
MATIC communication)
Shared system/terminal bus
When using PCS 7 for process engineering plants, we recommend you separate the terminal
bus and system bus. This recommendation is based on the most stringent requirements for
availability and robustness of these plants.
Note
Connection
Nodes must always be connected with two separate network adapters or communications
processors even when using a shared bus.
PCS 7 - PC Configuration (V8.2)
Installation Manual, 03/2016, A5E36200050-AB
PC components of a PCS 7 system
3.9 Connecting PC stations
Between the following components:
Engineering station and the following stations:
● Operator control and monitoring systems (OS
server, OS clients)
● BATCH stations (BATCH server, BATCH
clients)
● Route Control stations (Route Control server,
Route Control client)
● OS servers
● BATCH servers and OS servers relevant to
BATCH
● OS server and OS clients
● BATCH server and BATCH clients
● Route Control server and Route Control clients
Between the following components:
Engineering station and automation system
Automation systems and OS server, Route Con‐
trol server
communication path:
CPU -> CP -> BUS -> network adapter (CP) -> OS/
RCS
Note: Communication with SIMATIC BATCH is
from the OS server to the BATCH server via the
terminal bus.
Automation systems
Communication path:
CPU -> CP -> BUS -> CP -> CPU
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