Sdo (Service Data Object); General; Sdo Server For Each Drive Object; Mapping Models - Siemens Sinamics S120 Commissioning Manual

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2.6 SDO (Service Data Object)

2.6 SDO (Service Data Object)
2.6.1

General

SDO services allow you to access the object directory for the connected drive unit. An SDO
connection is a peer-to-peer connection between an SDO client and a server.
The drive unit with its object directory is an SDO server (Page 64).
SDO services have the following properties:
● Confirmed transmission of objects
● The transmission procedure is always asynchronous
● Transmission of values greater than four bytes (normal transfer)
● Transmission of values with no more than four bytes (expedited transfer)
● Corresponds to the acyclic PROFIBUS parameter channel
● All drive unit variables can be addressed via SDO
● An SDO connection exists only in the "PREOPERATIONAL" and "OPERATIONAL" states
2.6.2

SDO server for each drive object

2.6.2.1

Mapping models

Several mapping models are supported:
● Multi-DO SINAMICS drive unit with one SDO server (default SDO server)
● Multi-DO SINAMICS drive unit with several EDS files and SDO servers
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Commissioning Manual, 11/2017, 6SL3097-4AA00-0BP3
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