Control And Status Words For Encoders - Siemens SINAMICS S120 Installation And Start-Up Manual

Communication via PROFIBUS
Cyclic communication
4.3.4

Control and status words for encoders

Description
The process data for the encoders is available in various telegrams. For example,
telegram 3 is provided for speed control with 1 position encoder and transmits the
process data of encoder 1.
The following process data is available for the encoders:
S Gn_CTW
S Gn_STW
S Gn_XACT1
S Gn_XACT2
Note
Encoder 1: Motor encoder
Encoder 2: Direct measuring system
Encoder 3: Additional measuring system
Example of encoder interface
Master
Fig. 4-10
4-112
Encoder n control word (n = 1, 2, 3)
Encoder n status word
Encoder n actual position value 1
Encoder n actual position value 2
PROFIBUS
G1_STW
G2_STW
Example for encoder interface (encoder 1: two actual values, encoder 2: one
actual value)
SINAMICS S120 Installation and Start-Up Manual, 12/04 Edition
G1_CTW
G2_CTW
G1_XACT1 G1_XACT2
G2_XACT2
geber_ss_01.vsd
E Siemens AG, 2004. All rights reserved
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