Control And Status Words For Encoders; Encoder N Control Word (Gn_Stw, N = 1, 2) - Siemens SINAMICS DCM Operating Instructions Manual

Descriptions of functions
10.10 Encoder evaluation
10.10.2

Control and status words for encoders

Description
An encoder interface is defined in the PROFIBUS Profile for drive technology (PROFIdrive
V4.1). This interface defines a control and status word for encoders.
They are available in the following parameters:
● r0480[0] = G1_STW encoder 1 control word
● r0480[1] = G2_STW encoder 2 control word
● r0481[0] = G1_ZSW encoder 1 status word
● r0481[1] = G2_ZSW encoder 2 status word
The bit assignments of the control and status words for the encoders can be seen in the
following function diagrams:
● FP4720 (control word for encoders 1 and 2)
● FP4730 (status word for encoders 1 and 2)
10.10.2.1

Encoder n control word (Gn_STW, n = 1, 2)

Encoder n control word (Gn_STW, n = 1, 2)
The encoder control word controls the encoder functions.
Table 10- 19 Description of the individual signals in Gn_STW
Bit Name
0 Reference mark
search
1
2
3
4
5
414
Functions Request reference mark search:
Bit Meaning
0 Function 1
1 Function 2
2 Function 3
3 Function 4
Note:
Bit x = 1

Bit x = 0
The following applies if more than 1 function is activated:

The values for all functions cannot be read until each activated function
has terminated and this has been confirmed in the corresponding status
bit (ZSW.0/.1/.2/.3 "0" signal again).
Reference mark search

It is possible to search for a reference mark.
Command Bit 6, 5, 4
Signal status, description
Reference mark 1
Reference mark 2
Reference mark 3
Reference mark 4
Request function
Do not request function
Meaning
000 –
Operating Instructions, 1.2012, C98130-A7066-A1-05-7619
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