Siemens SINAMICS S Manuel page 1118

Reference mark search
This function is provided once for each of
the maximum 3 encoders.
No equivalent zero mark
(evaluate the encoder zero mark for encoder n)
p0490.9
"Fast inputs"
0
DI9_probe
(X122.8)
1
[2130.4]
1
p0490.10
0
DI10_probe
(X122.10)
1
[2131.4]
1
p0490.11
0
DI11_probe
(X122.11)
1
[2131.4] 1
From the p0490.13
digital
inputs/
outputs
0
<5>
DI13_probe
(X132.8)
1
[2132.4] 1
p0490.14
0
DI14_probe <5>
(X132.10)
1
[2133.4] 1
p0490.15
0
<5>
DI15_probe
(X132.11)
1
[2133.4]
1
1 2
DO: SERVO, VECTOR
Encoder evaluation - reference mark search with equivalent zero mark, encoders 1 ... 3
STW for encoder n Activate selected function
Gn_STW [4720]
Select the function to be activated
r0487[n-1].0
r0487[n-1].4
&
r0487[n-1].7 1
<3>
element (flip-flop)
0
Zero mark input
0...6
p0495[n-1] (0)
1
0
1
2
2
3
4
5
6
3
4
<1> The measured value memory is read-out using a handshaking technique according to [4720], [4730].
5
<2> Index [n-1] --> encoder n (n = 1, 2, 3)
Index [0] --> encoder 1
Index [1] --> encoder 2
Index [2] --> encoder 3
<3> All other bits in the encoder control word must be 0.
<4> Increasing position actual values (r0482) --> The 0/1 edge is evaluated.
Decreasing position actual values (r0482) --> The 1/0 edge is evaluated.
This means when traversing to an equivalent zero mark, the same reference point is always used.
6
<5> These measuring probe inputs only exist on the CU320.
3 4
Position actual value 1
from encoder n
[4704.8]
Store
r0483[n-1]
D
D memory
Q
Measured-value memory
<4>
x
&
5 6
fp_4735_01_eng.vsd
23.03.06 V02.04.00
PROFIBUS sampling time
Refer to [1020.7]
<1>
Reference mark
position to the
Gn_XIST2
y
encoder interface
for function No. = 1
[4704.4]
Store
7 8
Function diagram
- 4735 -
SINAMICS S