Siemens Sinumerik 840D Series Function Manual page 220

7 Peripherals/Accessories
7.1 Measuring systems
Table 7-1 Limit data for measuring system signals
Parameters
Mean voltage
Amplitude
Ratio
Dynamic change in amplitude
Direct component
Dynamic change in
direct component
Signal frequency
Phase shift
1)
Harmonic distortion
Useful signal
DC voltage
Uniqueness range
1) Definition for harmonic distortion: k =
7-220
360 degrees
Electrical
0
0
Direct component
U
G(R)
0
Fig. 7-2 Required signal chart of measuring system signals (incremental and
reference) after differential amplification for data function
Description
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
direct(R)
α1; α2
2 2
U1 +U2 +...Un
2 2
U0 +U1 +...Un
SINUMERIK 840D/SIMODRIVE 611 digital, HLA Module (FBHLA) - 10.03 Edition
Direct component U
β
45 degrees
Direct component U
Uniqueness range
α1 α2
min. typ.
1.75
350 500
0.9 1.0
-
-0.2
-
-
85 90
-
300
-150
50
2
U0: Fundamental component
2
U1...Un: Harmonic components
 Siemens AG, 2003. All rights reserved
02.99
10.03
G(A)
Mech. angle ϕ
G(B)
Mech. angle ϕ
Useful signal
Mech. angle ϕ
max. Unit
3.25 V
600 mv
1.1 -
- 0.3 mV/360° el.
0 +0.2
- 1 mV/360° el.
- 200 kHz
95 Degrees
- 1 %
- 1500 mV
- -500 mV
- 270 Degrees