Siemens MICROMASTER 440 Operating Instructions Manual page 126

3 Functions
If the OFF1 command is initiated while the drive is accelerating, then rounding-off
can be activated or de-activated using parameter P1134 (refer to Fig. 3-48). These
rounding-off times are defined using parameters P1132 and P1133.
P1132 > 0
P1133 > 0
f
P1134 = 0
f
P1134 = 1
ON
OFF1
Fig. 3-48
In addition to the rounding-off times, the ramp-function generator can be influenced
using external signals. The ramp-function generator provides the following
functionality using BICO parameters P1140, P1141 and P1142 (refer to Table
3-15).
The ramp-function generator itself is enabled after the pulses have been enabled
(inverter enable) and after the excitation time has expired (P0346). After limiting to
the maximum speeds for the positive and negative directions of rotation (P1082, -
P1082 or 0 Hz for the direction of rotation inhibit) the setpoint speed for the control
is obtained (r1170).
While the V/f characteristic operates up to 650 Hz, the control (closed-loop) is
limited to a maximum frequency of 200 Hz (r1084).
126
f
Setpoint reached
Set
P1132
f
Setpoint reached
Set
P1132
Rounding off after an OFF1 command
Setpoint not reached
P1133 P1132
Setpoint not reached
P1133
MICROMASTER 440
Issue 10/03
t
P1133
t
P1133
t
Operating Instructions
6SE6400-5AW00-0BP0