Differences Between Profibus => Profinet - TR-Electronic MP-Series Benutzerhandbuch

16 Differences between PROFIBUS => PROFINET
The following table shows the differences between PROFIBUS and PROFINET:
Maximum number of nodes in a
network
Identification / address setting
General
hardware
Transmission rate
Bus termination
Topology
Star configuration
Tree configuration
Topology
Line implementation
Ring configuration
Maximum cable lengths
Device description
General
software Data prioritization
IT services
Printed in the Federal Republic of Germany
06/06/2019
Description
TR - EMO - BA - DGB - 0019 - 08
PROFIBUS
125 nodes
Via address switch or
spec. telegram e.g.
station address= 4
Max. 12 Mbit/s
By connecting an
external/internal
terminating resistance
Standard: Line, tree and
ring possible
PROFIBUS-DP is
looped through from
node to node as
standard.
Implementation as tree
and ring, see SIEMENS
manual "PROFIBUS
Networks".
< 9.6 km
GSD file: keyword-
based text file
Immediately prioritized
data exchange
Not possible
PROFINET
Only defined by the
network ID >1000
Allocation of a device
name e.g. device
name=
encoTRive001
100 Mbit/s full duplex
Not required
Standard: Star and
tree, line and ring
possible
A maximum of one
node is connected to
each port of a switch
The switches are
connected to each
other.
PROFINET devices
are connected
together by integrated
switches.
The two open ends of
a line are closed to
form a ring via a
redundancy manager.
< 1.5 km
GSDML file: XML-
based with schema
definition
Possible by adjusting
the update rate
Can be used without
limitation
 TR-Electronic GmbH 2008, All Rights Reserved
Page 249 of 252