Control And Status Words For Encoder - Siemens SINAMICS S120 Function Manual

Communication PROFIBUS DP/PROFINET IO
10.1 Communication according to PROFIdrive
10.1.3.4

Control and status words for encoder

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:
● Gn_STW encoder n control (n = 1, 2, 3)
● Gn_ZSW encoder n status word
● Gn_XIST1 encoder n act. pos. value 1
● Gn_XIST2 encoder n act. pos. value 2
Note
Encoder 1: Motor encoder
Encoder 2: Direct measuring system
Encoder 3: Additional measuring system
Encoder 3 can be connected via p2079 and extension of the standard telegrams.
Example of encoder interface
Figure 10-10 Example of encoder interface (encoder-1: two actual values, encoder -2: one actual
Encoder n control word (Gn_STW, n = 1, 2, 3)
The encoder control word controls the encoder functions.
Table 10- 31 Description of the individual signals in Gn_STW
Bit Name
0 Find reference
mark or flying
1
measurement
2
452
value)
Functions If bit 7 = 0, then find reference mark request applies:
Bit Meaning
0 Function 1
Signal status, description
Reference mark 1
Function Manual, (FH1), 10/2008, 6SL3097-2AB00-0BP5
Drive functions