Efficient Networks Siemens Sinamics S120 - Manual (Page 375)

Communication PROFIBUS DP/PROFINET IO
10.1 Communications according to PROFIdrive
Drive Functions
Function Manual, (FH1), 07/2007 Edition, 6SL3097-2AB00-0BP4
375
XistP
Actual position value is displayed
Normalization: 1 corresponds to 1 LU
10.1.3.5 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_CTW 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
6ODYH 0DVWHU
352),%86
*B67:
*B67:
*B=6:
*B=6: *B;,67 *B;,67
*B;,67
*B67:
*B67:
*B=6:
*B=6: *B;,67 *B;,67
*B;,67
Figure 10-11 Example of encoder interface (encoder-1: two actual values, encoder -2: an actual value)
Encoder n control word (Gn_CTW, n = 1, 2, 3)
The encoder control word controls the encoder functions.