Functions
6.11 Operation in fieldbus systems
SINAMICS G110D
168 Operating Instructions, 07/2016, FW V3.63, A5E36768472B AB
AS-i Profile
AS-i slave configurations
The Inverter uses the extended AS-i specification V3.0, specifically to allow serial
communications over the AS-i bus. The specific profile used by the Inverter is S-7.A.5 which
allows 50 bps bi-directional communications for 2 digital inputs and 2 digital outputs.
The Inverter contains two logical AS-i slaves, which can be used in either the single slave
mode or the dual slave mode. Each of these modes are individually described below.
In simple applications, and to allow the Inverter to be used with an AS-i master that does not
support extended addressing the single slave mode can be selected.
When the Inverter is configured as a single slave, only process image data can be
transferred over the AS-i bus. The single slave mode does not support extended addressing
so the number of nodes available on the AS-i bus is limited to a maximum of 32 slaves.
The structure and flow of data is given in the diagram below.
Table 6- 53 AS-i single slave identities
Free profile slave with standard addressing.
Single or dual slave mode is selected using paramter P2022. The default mode for this
parameter is dual slave mode. The settings for this parameter are given in the table below.
Table 6- 54 Selection of slave mode (P2022)
0 Single slave mode without extended addressing.
Dual slave mode with extended addressing.
Note: After this parameter is changed, the Inverter will perform an AS-i reset in order to load the new profile information.
The slave address will be reset to 0.
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