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 6RA70 Series Instructions Manual

PNU Description

10.30 Compensation of moment of inertia (dv/dt injection)

(see also Section 8, Sheet G153 of Operating Instructions 6RX1700-0AD**)
P540 Acceleration time
The acceleration time is the time that would be needed to accelerate the
FDS
drive from 0% to 100% of maximum speed (with no friction) at 100%
converter rated DC current (armature) and 100% rated motor field current
(G153)
(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).
P541 P gain of acceleration
FDS Proportional gain for "SAD-dependent acceleration" function (see also
(G153) parameter P543)
P542 Time difference for dy/dt of ramp-function generator
Ramp-function generator:
FDS
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
(G136)
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)
P543 Threshold for SAD-dependent acceleration
With respect to the SAD-dependent acceleration function, only the
FDS
component of the speed controller setpoint/actual value difference which
has an absolute value in excess of the threshold set in this parameter is
(G153)
switched through (see also parameter P541).
Output (value to be multiplied by P541)
199.99%
negative
threshold
-200.00% (-P543)
P546 Filter time for compensation of moment of inertia
FDS
(G153)
SIEMENS Energy & Automation
SIMOREG DC Master Base Drive Panel Operating Instructions
Input (setp./act. val. diff.)
positive
199.99%
threshold
(P543)
-200.00%
Value range No. indices
[Unit] Factory
Steps setting
Type
0.00 to 650.00 Ind: 4
[s] FS=0.00
0.01s Type: O2
0.00 to 650.00 Ind: 4
0.01 FS=0.00
Type: O2
0.01 to 300.00 Ind: 4
[s] FS=0.01
0.01s Type: O2
0.00 to 100.00 Ind: 4
[%] FS=0.00
0.01% of maximum Type: O2
speed
0 to 10000 Ind: 4
[ms] FS=0
1ms Type: O2
See
Change
(Access /
Status)
P052 = 3
P051 = 40
Online
P052 = 3
P051 = 40
Online
P052 = 3
P051 = 40
Online
P052 = 3
P051 = 40
Online
P052 = 3
P051 = 40
Online
10-55