Figure 10-12 Energy Saving Mode 2 - Siemens MICROMASTER 411 Operating Instructions Manual

Issue 03/01
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 P 2393
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.
p*
PID
SET
PID
ACT
r2398
P2395
P2396
Load f(t)
(e.g. valve)

Figure 10-12 Energy Saving Mode 2

MICROMASTER 411 & COMBIMASTER 411
6SE6400-5CA00-0BP0
p *
P2394
v(t) 1
0
u u
0 1
PID
1
RFG
0
P2393
x(t)
1
0
P P*
x
p = P2393 p*
x
PID
ACT
limit
p(t)
p_act
p*
p
x
x(t)
1
0
u_act
u
2
u
1
u
0
f(t)
f_act
Operating Instructions
P2395
P2397
r2398
u(t)
u u
2 max
p* m
PID
PID
limit
f
P2273
Motor
( )
PID
p*
p* m
10 Engineering Information
normalized via P2002
P2396 r0086
Pressure
equalizing
reservoir
Pressure
Motor
sensor
control
f(t)
Load
t
t
t
t
131