Siemens 6RA70 Series - Compensation of Moment of Inertia (DV;Dt Injection); P540 Acceleration Time; P542 Time Difference for Dy;Dt of Ramp-Function Generator; P543 Threshold for SAD-Dependent Acceleration

SIEMENS Energy & Automation 10-55
SIMOREG DC Master Base Drive Panel Operating Instructions
PNU Description Value range
[Unit]
Steps
No. indices
Factory
setting
Type
See
Change
(Access /
Status)
10.30 Compensation of moment of inertia (dv/dt injection)
(see also Section 8, Sheet G153 of Operating Instructions 6RX1700-0AD**)
P540
FDS
(G153)
Acceleration time
The acceleration time is the time that would be needed to accelerate the
drive from 0% to 100% of maximum speed (with no friction) at 100%
converter rated DC current (armature) and 100% rated motor field current
(i.e. 100% flux). It is a measure of the moment of inertia on the motor shaft.
This parameter is set automatically during the optimization run for friction
and moment of inertia compensation (P051=28).
0.00 to 650.00
[s]
0.01s
Ind: 4
FS=0.00
Type: O2
P052 = 3
P051 = 40
Online
P541
FDS
(G153)
P gain of acceleration
Proportional gain for "SAD-dependent acceleration" function (see also
parameter P543)
0.00 to 650.00
0.01
Ind: 4
FS=0.00
Type: O2
P052 = 3
P051 = 40
Online
P542
FDS
(G136)
Time difference for dy/dt of ramp-function generator
Ramp-function generator:
Setting of dt
for the output of dy/dt at a connector, i.e. at K0191, the change
in the output quantity of the ramp-function generator (K0190) is output within
the period set in P542
Example: - The ramp-function generator is currently ramping up with a
ramp-up time of P311=5s, i.e. a ramp-up operation from y=0%
to y=100% takes 5s.
- A time difference dt of P542=2s is set.
-
⇒ A dy/dt of 40% appears at connector K0191 since the dy
within the set dt of 2 s equals (2s/5s)*100%..
(see also parameter P330)
0.01 to 300.00
[s]
0.01s
Ind: 4
FS=0.01
Type: O2
P052 = 3
P051 = 40
Online
P543
FDS
(G153)
Threshold for SAD-dependent acceleration
With respect to the SAD-dependent acceleration function, only the
component of the speed controller setpoint/actual value difference which
has an absolute value in excess of the threshold set in this parameter is
switched through (see also parameter P541).
Input (setp./act. val. diff.)
Output (value to be multiplied by P541)
199.99%
199.99%
-200.00%
-200.00%
negative
threshold
(-P543)
positive
threshold
(P543)
0.00 to 100.00
[%]
0.01% of maximum
speed
Ind: 4
FS=0.00
Type: O2
P052 = 3
P051 = 40
Online
P546
FDS
(G153)
Filter time for compensation of moment of inertia
0 to 10000
[ms]
1ms
Ind: 4
FS=0
Type: O2
P052 = 3
P051 = 40
Online