Siemens SINAMICS G120D - Fig. 2-3 1022 - Explanation of the symbols (Part 3)

Explanations on the function diagrams
Function diagrams
2-581
© Siemens AG 2012 - 2013 All Rights Reserved SINAMICS G120D List Manual (LH14), 01/2013
Fig. 2-3 1022 – Explanation of the symbols (Part 3)
- 1022 -
Function diagram
87654321
fp_1022_97_61.vsd
Explanations for the function diagrams
SINAMICS G120D
12.12.2012 V4.6
Explanation of the symbols (Part 3)
T0
xy
pxxxx
yx
H(s) =
s
2
fn_z 2 fn_z
 s + 1
+
+
s
2
fn_n
2 fn_n
2  D_z
2
2
f
2nd Order Filter
|y|
fs
f_B
t
y
pxxxx
H(s) =
+
s
2
fn_n
.
2 fn_n
D_n
s+ 1
2
.
2
1
yx
f
|y|
fn
D
0T
xy
pxxxx
T1 T2
T0
pxxxx
0T
pxxxx
xy
xy
xy
T1 T2
xy
pxxxx pxxxx
pxxxx pxxxx
x
TT TT
y
TT
x
y
x
TT
y
T1 T1 T2 T2
y
x
1
I
x
2
f_B
Switch-on delay
The digital signal x must have the value "1" without any interruption
during the time T before output y changes to "1".
Switch-off delay
The digital signal x must have the value "0" without interruption
during the time T before output y changes to "0".
Delay (switch-on and switch-off)
PT1 element
Delay element, first order.
pxxxx = time constant
PT2 low pass
Damping,
denominator
D_n
pxxxx
Natural frequency,
denominator
fn_n
pxxxx
Damping, denominator
D_n
pxxxx
Natural frequency, denominator
fn_n
pxxxx
Transfer function
2nd-order filter (bandstop/general filter)
Natural frequency, numerator
fn_z
pxxxx
Damping, numerator
D_z
pxxxx
Used as bandstop filter
- center frequency fs:fn_z = fs
fn_n = fs
- bandwidth f_B: D_z = 0
D_n =
Transfer function when used as general filter
Analog adder can be activated
The following applies to I = 1 signal: y = x1 + x2
The following applies to I = 0 signal: y = x1
1
0
pxxxx
Switch symbol
Simple changeover switch
The switch position is shown according to
the factory setting
(in this case, switch position 1 in the default
state on delivery).
The digital signal x must have the value "1" without interruption
during time T1 or must have the value "0" during time T2 before
output y changes its signal state.
2  D_z
 s + 1
2  fs