Siemens MICROMASTER 411 - Manual (Page 131)

Issue 03/01 10 Engineering Information
MICROMASTER 411 & COMBIMASTER 411 Operating Instructions
6SE6400-5CA00-0BP0 131
10.2.6.2 Energy Saving Mode 2 (P2393 - P2398)
Using the energy saving functionality, the control loop behavior is controlled so that
the inverter recognizes that the load is reduced. In this case, the inverter will be
shutdown if the actual value lies above the threshold px, which is defined by
parameter P2393 and the setpoint p*.
* p 2393 P p
x
⋅ =
When the load decreases, this is recognized by the active current r0086, which is
fed via the BICO-Parameter P2396 to a normalized characteristic.
PID
−
f
P2273
( ∆
PID
)
Pressure
equalizing
reservoir
f(t)
Pressure
sensor
PID
SET PID
limit
Motor
Motor
control
Load
PID
RFG
p*
1
0
p* m
1
u
0
u
1
u
2
u
max
0
p
x
= P2393 p*
x(t)
r2398
u(t) v(t)
P2397
P2394 P2395
P2393
r0086 P2396
PID
ACT
limit
PID
ACT
1
P
x
0
P*
normalized via P2002
t
p*
t
0
1
x(t)
p(t)
u_act
p
x
t
u
2
r2398
u
1
u
0
p_act
f_act
t
f(t)
p* m
p*
P2395
P2396
Load f(t)
(e.g. valve)
Figure 10-12 Energy Saving Mode 2