Siemens 420 manual P1132 P1133, P1134 =

Issue 07/04 3 Functions

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
Setpoint reached
fSet
P1134 = 0		Setpoint not reached
			t
P1132	P1133	P1132	P1133
f
Setpoint reached
fSet
		Setpoint not reached
P1134 = 1
			t
P1132	P1133	P1133
ON
OFF1			t

Fig. 3-43 Rounding off after an OFF1 command

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	113