Siemens MICROMASTER 420 Operating Instructions Manual page 113

Issue 07/04
In order to avoid torque surges at the transitions (constant velocity phase
accelerating / braking phase), additional rounding-off times P1130 – P1133 can be
programmed. This is especially important for applications (e.g.
transporting/pumping liquids or for cranes) which require an especially "soft", jerk-
free acceleration and braking.
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. 3-43). These
rounding-off times are defined using parameters P1132 and P1133.
P1132 > 0
P1133 > 0
f
P1134 = 0
f
P1134 = 1
ON
OFF1
Fig. 3-43
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.
MICROMASTER 420 Operating Instructions
6SE6400-5AA00-0BP0
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
3 Functions
t
P1133
t
P1133
t
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