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Controllers
6.6 Connecting terminals and interfaces
AT40, ATD400V, ATD400K, ATD4xxW, ATD400S, ATE250S, ATD400T
154
System Manual, 06/2016, A2B00096162-AN
Automatic addressing
The Discovery and basic Configuration Protocol (DCP) is used mandatorily for the automatic
assignment of IP addresses.
Media redundancy
In the case of PROFINET, the Media Redundancy Protocol (MRP) is used for the media
redundancy of ring topologies. The ATD430W IO device assumes the role of an MRP client.
The MRP manager function is not supported.
Isochronous data exchange
The ATD430W IO device also supports the IRT protocol and thus class C functionality (CC-
C). This supports isochronous data exchange up to 250 µs. The IO device forwards all data
isochronously. The application program on the ATD430W does not operate isochronously.
6.6.6.4
Wiring and connecting a PROFIBUS/USS connector
Requirement
NOTICE
PROFIBUS connector
Use only the recommended PROFIBUS connectors from Siemens. See Section
Accessories (Page 23).
NOTICE
Material damage resulting from the connection of a PROFIBUS connector to service
connection X8
Connecting a PROFIBUS connector to service connection X8 can damage the SIDOOR
controller and the connected device.
For this reason, connect a (USS / PROFIBUS) bus connector only to connection X705.
Note
•
Always use shielded cables.
•
For stationary operation, it is advisable to remove the insulation of the shielded cable and
to establish contact on the shield/PE conductor bar.
•
If there is a potential difference between the grounding points, an impermissibly high
compensating current can flow through the shield grounded at both ends. To rectify the
problem, do not, under any circumstances, open the shield of the bus cable.
Install an additional equipotential bonding conductor parallel to the bus cable to carry the
shield current.
•
You will find more detailed information in Manual SIMATIC Net PROFIBUS Networks
http://support.automation.siemens.com/WW/view/de/1971286/0/en