Encoder evaluation
Function Diagrams
2-1265
© Siemens AG 2007 All Rights Reserved
SINAMICS S List Manual (LH1), 07/2007
Figure 2-148 4735 – Reference mark search with equivalent zero mark, encoders 1 ... 3
- 4735 -
Function diagram
87654321
fp_4735_01_eng.vsd
DO: SERVO, VECTOR
SINAMICS S
12.03.07 V02.05.00
Encoder evaluation - Reference mark search with equivalent zero mark, encoders 1 ... 3
p0490.15
p0490.14
p0490.13
p0490.11
p0490.10
p0490.9
DI15_probe
(X132.11)
[2133.4]
DI14_probe
(X132.10)
[2133.4]
DI13_probe
(X132.8)
[2132.4]
DI11_probe
(X122.11)
[2131.4]
DI10_probe
(X122.10)
[2131.4]
DI9_probe
(X122.8)
[2130.4]
"Fast inputs"
Zero mark input
0...6
p0495[n-1] (0)
Reference mark search
This function is provided once for each of
the maximum 3 encoders.
STW for encoder n
Gn_STW [4720]
r0487[n-1].0
Gn_XIST2
for function No. = 1
xy
Store
<1>
<2>
Measured-value memory
The measured value memory is read out using a handshaking technique according to [4720], [4730].<1>
Index [n-1] --> encoder n (n = 1, 2, 3)
Index [0] --> encoder 1
Index [1] --> encoder 2
Index [2] --> encoder 3
&
r0487[n-1].4
r0487[n-1].7
Q
D
D memory
element (flip-flop)
Activate selected function
No equivalent zero mark
(evaluate the encoder zero mark for encoder n)
1
0
2
3
4
5
6
From the
digital
inputs/
outputs
Reference mark
position to the
encoder interface
[4704.4]
<3>
<3>
All other bits in the encoder control word must be 0.
r0483[n-1]
Position actual value 1
from encoder n
[4704.8]
1
0
1
1
0
1
1
0
1
1
0
1
1
0
1
1
0
1
1
&
0
1
2
3
4
5
6
<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 that the same reference point is always used when traversing to an equivalent zero mark.
<4>
Store
Select the function to be activated
<5>
These measuring probe inputs only exist on the CU320.<5>
<5>
<5>
Refer to [1020.7]
PROFIdrive sampling time
Applies only for CU_S and CU_CX32.<6>
<6>
<6>
<6>
<6>
<6>
<6>
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