Bus And Serial Connections - Siemens SINUMERIK 840 Planning Manual

2 Local Area Networks

2.3 Bus and serial connections

2.3 Bus and serial connections
In addition to local area networks featuring either only bus connections or only serial
connections, there are mixed forms of networks.
The following figure shows a network with different connection types, using the example of a
NC system. In this example the CNC is the master station of a star network and at the same
time a node on the bus network.
The CNC is connected to the higher-level host systems (e.g. host computer) and the systems
at the same level (e.g. RC controls) via bus connection.
Data transfer between the CNC and the secondary systems (e.g. read stations) is via serial
connections.
FMS
SINEC
SINEC
TPS
Programmer
connection
Serial
interface
Read station 1
Tool data
2–12
CP231A
SINEC
CNC
RC
CP315/373
Serial
interface
Read station 2
Tool data
© Siemens AG 1989 All Rights Reserved
PPC
SINEC
Bus
SINEC H1
Programmer
connection
SINEC
Measuring
machine
Serial Serial
interface interface
. . .
Read stat.
Pal. - data
6FC5 197-0AB20-0BP0
SINUMERIK 840/880 (PJ)
08.89