Fig. 3-106 4704 – Position sensing, encoders 1 ... 2
- 4704 -
Function diagram
87654321
fp_4704_97_04.vsd
Encoder evaluation
SINAMICS G120D
09.12.2015 V4.7.6
Position sensing, encoders 1 … 2
A
B
1 2
1
2
III
u
p
dn
32 Bit
Control Unit
<1>
A
B
2
n
2
n
x2
n
-1
1
0
31 n-1
n
0
[4010.1]
[4735.6]
x2
n
<2> <6>
<2> <5>
[4730.1]
&
r0487[n-1]
Geb Gn_STW
14-15
[4720.4]
<2>
inkr
0
2
32
-1
[4730.5]
<4>
<3>
-1
0
1
-1
0
1
<7>
Encoders
Enc_typ sel
0 ... 9999
p0400 [D] (0)
Enc_config eff
- ... -
p0404 [D]
Sq-wave enc A/B
- ... -
p0405 [D]
Enc grid div
0 ... 250000000 [nm]
p0407 [D]
Rot enc pulse No.
0 ... 16777215
p0408 [D]
Enc abs multiturn
0 ... 4294967295
p0421 [D]
Enc abs meas step
0 ... 4294967295 [nm]
p0422 [D]
Enc abs singleturn
0 ... 1073741823
p0423 [D]
Enc rot dist ZM
0 ... 16777215
p0425 [D]
Configuration, absolute value encoder
To speed sensing
Raw position signals
(only from encoder 1)
Direction of rotation
Direction of
rotation
CU detection LED
0 ... 1
p0124 [D] (0)
Raw position
signals
Enc fine Gx_XIST1
2 ... 18
p0418 [D] (2)
r0482
Enc Gn_XIST1
r0479
Diag Gn_XIST1
r0483
Enc Gn_XIST2
1 signal period
Multiplication
by hardware
Free-running
position
counter
No. of signal
periods
Fine resolution
For SSI encoders: Absolute position information
Cyclic absolute
position value
(only for absolute value
encoders, e.g. SSI)
Enc inv act value
- ... -
p0410 [D]
Multiplication
by hardware
Sequence control
Function selection
Reference mark position
Absolute value
Enc fine Gx_XIST2
2 ... 18
p0419 [D] (2)
Error code
Measuring probe position
Encoder error
processing
Encoder control word
Measuring probe position
Encoder status word
r0481
Enc Gn_ZSW
[n-1]
[n-1]
[n-1]
[n-1]
Encoder status bits
to Gn_ZSW
F31100...A32999
encoder faults/alarms
p0979[0...25]
Encoder format acc. to
PROFIdrive
For rotary encoders = pulse number setting.
Assignment of the indices: Index [n-1] --> Encoder n
Index [0] --> Encoder 1
Index [1] --> Encoder 2
For SIMODRIVE-compatible functions: Set p0418 = 11.
Generating the two's complement.
Gn_XIST1 is a free-running position value.
The external control must process the overflows.
The contents of r0483/r2723 are determined by the encoder
status word/control word. Refer to [4720] and [4730].
Interface SSI.
SM properties
r0458
Encoder n
Bits
Bits
Mot/load motor rev
1 ... 1048576
p2504 [D]
Mot/load load rev
-1048576 ... 1048576
p2505 [D]
[4735.7]
[4715.1]
0-13
<1>
<2>
<3>
<5>
<4>
<7>
<6>
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