Siemens SINAMICS G120 List Manual page 740

Switch-on delay
pxxxx
x
x T 0 y
The digital signal x must have the value "1" without any interruption
during the time T before output y changes to "1".
T T T T
x
y
Switch-off delay
pxxxx
x
x 0 T y
The digital signal x must have the value "0" without interruption
during the time T before output y changes to "0".
T T T T
x
y
Delay (switch-on and switch-off)
pxxxx pyyyy
x
x T T y
1 2
pxxxx pyyyy
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.
T T T T
1 1 2 2
x
y
1 2
Explanations on the function diagrams
Explanation of the symbols (part 3)
Switch symbol
y pxxxx
Simple changeover switch
T 0
The switch position is shown according
0
to the factory setting of pxxxx
(in this case switch position 1).
pxxxx
1
PT1 element
pxxxx
y
y
0 T
t
Delay element, first order.
pxxxx
pxxxx = time constant
PT2 low pass
Natural frequency, denominator
fn_d
pxxxx
y
|y|
T T
1 2
x
Transfer function
1
H(s) =
2
s
2 · D_d
+
2 fn_d 2 fn_d
3 4
2nd-order filter (bandstop/general filter)
Natural frequency, numerator
Natural frequency, denominator
Used as bandstop filter
- center frequency fs:
- bandwidth f_B:
Damping, denominator
D_d
pyyyy
Transfer function when used as general filter
H(s) =
D
y
Analog adder can be activated
fn
f
· s + 1
5
fp_1022_97_61.vsd
05.09.2017
Damping, numerator
fn_n D_n
pzzzz pwwww
|y|
fs
x y
f_B
f
2nd Order Filter
Damping, denominator
fn_d D_d
pxxxx pyyyy
fn_n = fs
fn_d = fs
D_n = 0
f_B
D_d =
2 · fs
2
s 2 · D_n
· s + 1
+
2 fn_n 2 fn_n
2 2 · D_d
s
+ · s + 1
2 fn_d 2 fn_d
x
1
The following applies to I = 1 signal: y = x1 + x2
y
x
2
The following applies to I = 0 signal: y = x1
I
6 7
Function diagram
G120 CU250S-2
V4.7.9
8
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