Ramp-Function Generator (Rfg) - Siemens MICROMASTER 420 Operating Instructions Manual

3 Functions
3.12.2

Ramp-function generator (RFG)

Parameter range:
Warnings
Faults
Function chart number:
The ramp-function generator is used to limit the acceleration when the setpoint
changes according to a step function. This therefore helps to reduce the stressing
on the mechanical system of the machine. An acceleration ramp and a braking
ramp can be set independently of one another using the ramp-up time P1120 and
the ramp-down time P1121. This allows a controlled transition when the setpoint is
changed (refer to Fig. 3-42).
Fig. 3-42
112
P1120, P1121
r1119, r1170
P1130 – P1142
-
-
FP5000, FP5300
f
f
max
f
2
f
1
P1120
f
f
max
f
2
f
1
P1130 P1131
t
up
f -
f
2 1
for
P1082
1
t
up
2
f -
f
2 1
for
P1082
t
down
Ramp-function generator
P1121
P1132
1
P1120 ( P1130 P1131)
2
f -
f
2 1
( P1130 P1131)
P1082
1
P1121 ( P1132 P1133)
2
1 f -
f
2 1
( P1132 P1133)
2 P1082
MICROMASTER 420
Issue 07/04
t
P1133 t
t
down
P1120
P1121
Operating Instructions
6SE6400-5AA00-0BP0