Description
2.2 Structure of PROFIBUS networks
PROFIBUS with STEP 7 V13
18
Function Manual, 12/2014, A5E03775446-AC
Selection criteria for networking
The table below includes selection criteria for electrical and optical networking of PROFIBUS
devices:
Table 2- 3
Selection criteria for electrical and optical networking
Criteria
Electrical
PROFIBUS
Optical network
with OLM
Optical network
with OBT
Transmission
medium
Shielded two-wire
line
●
–
–
POF
–
●
●
PCF
–
●
●
Glass
–
●
–
Distances
Max. network span
PROFIBUS DP:
9.6 km
PROFIBUS PA:
1.9 km
90 km
9.6 km
Between two devices up to 1 km
1)
up to 15 km
2)
up to 300 m
2)
Topology
Bus
●
–
–
Linear
–
●
●
Tree
●
●
●
Ring
–
●
●
Transmission
protocols
DP, PA
DP, PA
DP
Connection of
devices by means
of
OLM
–
●
–
Integrated interfaces ●
–
●
Bus terminal
●
–
●
Bus connector
●
–
–
Electrical network
segments can be
connected
●
●
–
● Suitable
– Not relevant for this application
1) Depending on data rate and type of service used
2) Depending on cable type used
Installation guideline for PROFIBUS networks
A PROFIBUS segment must be terminated at the start and end; passively with a connector
or actively with a bus terminating resistor.
The same principles apply to the installation of a PROFIBUS network as described in the
SIMATIC NET PROFIBUS networks
http://support.automation.siemens.com/WW/view/en/35222591
) manual.
Содержание SIMATIC ET 200AL
Страница 2: ......
Страница 143: ......
Страница 218: ......
Страница 250: ......
Страница 296: ......
Страница 337: ......
Страница 365: ......
Страница 392: ......
Страница 419: ......
Страница 451: ......
Страница 483: ......
Страница 597: ......
Страница 648: ......
Страница 702: ......
Страница 739: ......
Страница 781: ......
Страница 804: ......
Страница 828: ......
Страница 853: ......
Страница 880: ......
Страница 906: ......
Страница 996: ...Diagnostics ...
Страница 1121: ......
Страница 1565: ......