Siemens SINUMERIK 840D Description Of Functions page 216

7 Peripherals/Accessories
7.1 Measuring systems
Table 7-1 Limit data of measuring system signals
Parameter
Mean voltage
Amplitude
Ratio
Dynamic change in amplitude
Direct component
Dynamic change in
direct component
Signal frequency
Phase displacement
1)
Harmonic distortion
Useful signal
DC voltage
Uniqueness range
1) Definition for harmonic distortion: k =
7-216
SINUMERIK 840D/SIMODRIVE 611 digital Descr. of Functions HLA Module (FBHLA) – 04.00 Edition
360 degrees Electrical
0
0
Direct
component U
G(R)
0
Fig. 7-2 Required waveform of motor system signals (incremental and reference sig-
nals) after differential amplification for data function
Designation
U ; U ; U
M(A) M(B) M(R)
A – *A; B – *B
(A – *A)/(B – *B)
∆(A – *A)/360° el.; ∆(B – *B)/360° el.
U /amplitude (A – *A);
G(A)
U /amplitude (B – *B);
G(B)
∆U
/360° el.;
G(A)
∆U
/360° el.
G(B)
fs
β
k
R – *R
U
G(R)
α1; α2
2 2
U1 +U2 +...Un
2 2
U0 +U1 +...Un
Direct component U
β
45 degrees
Direct component U
Uniqueness range
Useful signal
α1 α2
Min. Typ.
1.75
350 500
0.9 1.0
– –
–0.2 0
– –
– –
85 90
– –
300 –
–150 –
50 –
2
U0: Fundamental component
2
U1...Un: Harmonic components
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02.99
G(A)
Mech. angle ϕ
G(B)
Mech. angle ϕ
Mech. angle ϕ
Max. Unit
3.25 V
600 mv
1.1 –
0.3 mV/360° el.
+0.2
1 mV/360° el.
200 KHz
95 Degrees
1 %
1500 mV
–500 mV
270 Degrees