TR-Electronic MP Series - 16 Differences between PROFIBUS => PROFINET

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