Siemens SINAMICS DCM Manual página 707

Switch-on delay
pxxxx
x
T 0
x 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
0 T
x 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 pxxxx
x
T T
x 1 2 y
pxxxx pxxxx
The digital signal x must have the value "1" without interruption during
time T or must have the value "0" during time T before output y
1 2
changes its signal state.
T T T T
1 1 2 2
x
y
1 2
DO: All objects
Explanations on the function diagrams - Explanation of the symbols (part 3)
PT1 element
pxxxx
y
T 0
y
pxxxx
t
2nd-order filter (bandstop/general filter)
Natural frequency, numerator
fn_n
pxxxx
y
x
0 T
pxxxx
Natural frequency, denominator
fn_d
pxxxx
Used as bandstop filter
Transfer function when used as general filter
y s
2 • D_n
2
+
T T
1 2 2 fn_n 2
H(s) =
2
s
2 • D_d
+
2 fn_d 2
Analog adder can be activated
x
The following applies to I = 1 signal: y = x
1
y
x
2
The following applies to I = 0 signal: y = x
I
3 4
Delay element, first order.
pxxxx = time constant
Damping, numerator
D_n
pxxxx
|y|
fs
y
f_B
f
2nd Order Filter
Damping, denominator
D_d
pxxxx
- center frequency fs: fn_n = fs
fn_d = fs
- bandwidth f_B: D_n = 0
f_B
D_d =
2 • fs
• s + 1
fn_n
• s + 1
fn_d
+ x
1 2
1
5
fp_1022_51_eng.vsd
17.07.13 V01.05.00
Natural frequency, denominator
PT2 low pass
fn_d
Damping, denominator
pxxxx
|y|
D
x
fn
f
Transfer function
H(s) =
s
2 fn_d
Linear
U_output max r0071
Mot U_rated p0304
f_set
U_boost total r1315
Parabolic
U_output max r0071
Mot U_rated p0304
f_set
U_boost total r1315
p0310
Flux current control (FCC)
U_output max r0071
Mot U_rated p0304
f_set
U_boost total r1315
Dependent on the load current
Mot f_rated
6 7
Function diagram
SINAMICS
D_d
pxxxx
y
1
2
2 • D_d
+ • s + 1
2 fn_d
p0310
p0310
8
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