Eds: Encoder Data Set - Siemens SINAMICS S120 Function Manual

Basic information about the drive system
12.2 Data sets
Binector inputs p0820 to p0824 are used to select a drive data set. They represent the
number of the drive data set (0 to 31) in binary format (where p0824 is the most significant
bit).
● p0820 BI: Drive data set selection DDS, bit 0
● p0821 BI: Drive data set selection DDS, bit 1
● p0822 BI: Drive data set selection DDS, bit 2
● p0823 BI: Drive data set selection DDS, bit 3
● p0824 BI: Drive data set selection DDS, bit 4
Supplementary conditions and recommendations
● Recommendation for the number of drive data sets for a drive
● Max. number of DDS for one drive object = 32 DDS
12.2.3

EDS: Encoder Data Set

EDS: Encoder Data Set
An encoder data set contains various adjustable parameters describing the connected
encoder for the purpose of configuring the drive.
● Adjustable parameters, e.g.:
The parameters that are grouped together in the encoder data set are identified in the
parameter list by "Data Set EDS" and are assigned an index [0...n].
A separate encoder data set is required for each encoder controlled by the Control Unit. Up
to 3 encoder data sets are assigned to a drive data set via parameters p0187, p0188, and
p0189.
An encoder data set can only be changed over using a DDS changeover.
An encoder data set changeover without pulse inhibit (motor running under current) may only
be performed on adjusted encoders (pollage ID performed or commutation angle determined
for absolute encoders).
Each encoder may only be assigned to one drive and within a drive must - in each drive data
set - either always be encoder 1, always encoder 2 or always encoder 3.
Using a power unit for the alternating operation of several motors would be an EDS
changeover application. Contactors are changed over so that the power unit can be
connected to the different motors. Each of the motors can be equipped with an encoder or
can also be operated without an encoder. Each encoder must be connected to its own SMx.
568
The number of drive data sets for a drive should correspond to the options for
changeover. The following must therefore apply:
p0180 (DDS) ≥ max. (p0120 (PDS), p0130 (MDS))
– Encoder interface component number (p0141)
– Encoder component number (p0142)
– Encoder type selection (p0400)
Function Manual, (FH1), 10/2008, 6SL3097-2AB00-0BP5
Drive functions