Siemens SINAMICS S120 Installation And Start-Up Manual page 113

Encoder 1 control word (G1_CTW)
The encoder control word controls the encoder functions.
Table 4-13 Description of the individual signals in Gx_CTW
Bit Name
0
1
Func- Func
tions
Find refer-
ence
2
marker
or
Measure-
ment on-
the-fly
3
4
Com-
5
mand
6
7 7 Mode Mode
8
... Reserved
12
E Siemens AG, 2004. All rights reserved
SINAMICS S120 Installation and Start-Up Manual, 12/04 Edition
Signal state, description
If bit 7 = 0, then find reference marker request applies:
Bit Meaning
0 Function 1
1 Reserved
2 Reserved
3 3 Reserved Reserved
If bit 7 = 1, then measurement on-the-fly request applies:
Bit Meaning
0 Function 1
1 Function 2
2 Function 3
3 3 Function 4 Function 4
Note:
S
Bit x = 1 Request function
Bit x = 0 Do not request function
S
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 (STW.0/.1/.2/.3 "0" signal again).
S
Find reference marker
It is possible to search for a reference marker.
S
Equivalent zero mark
S
Measurement on-the-fly
The positive and negative edge can be activated simultaneously.
Bit 6, 5, 4 Meaning
000 –
001 Activate function x
010 Read value x
011 Abort function x
(x: function selected via bits 0 – 4)
1 Measurement on-the-fly (fine resolution via p418)
0 Find reference marker (fine resolution via p418)
-
Communication via PROFIBUS
Cyclic communication
Reference marker 1
Probe 1 positive edge
Probe 1 negative edge
Probe 2 positive edge
Probe 2 negative edge Probe 2 negative edge
4-113