Operating instructions

Issue 10/06 6 Commissioning
MICROMASTER 430
Operating Instructions (Compact)
57
f
t
f
P1080
P2390 [Hz]
f
Restart
P2391
%
t
P2392
t
x
t
y
∆
PID
PID feedback
(Sensor)
PID setpoint
PID setpoint
Energy saving mode active
PID active
PID active
Motor
f
set,
% 100
5% P2390
P2000 f
Restart
+
⋅=
% 100
P2390
P2000 [Hz] P2390 ⋅=
1121P
P1082
0801P
tx ⋅=
1120P
P1082
f
t
Restart
y
⋅=
NOTE
If energy saving setpoint is 0, the energy saving function is disabled.
Energy saving mode is an added feature to enhance PID functionality, and switches of the
motor when the inverter is running at low setpoint.
Energy saving timer
When the energy saving timer P2391 has expired, the inverter is ramped down to stop and
enters energy saving mode (see description and diagram of P2390).
Energy saving restart setpoint
While in energy saving mode, the PID controller continues to generate the error P2273 -
once this reaches the restart point P2392 the inverter immediately ramps to the setpoint
calculated by the PID controller (see description and diagram of P2390).
As soon as the energy-saving mode of the drive inverter has been deactivated, it can only
be re-activated if the output setpoint of the converter has again reached the restart
setpoint.
0 s
P2391 = ...
0 %
P2392 = ...