Advanced commissioning
6.13 Setpoint calculation
Converter with the control units CU240D-2
Operating Instructions, 04/2018, FW V4.9 SP10, A5E34262100B AF
185
When compared to the extended ramp-function generator, the basic ramp-function generator
has no rounding times.
Table 6- 28 Parameters for setting the ramp-function generator
Parameter
Description
p1115 = 0
Ramp-function generator selection (factory setting: 1)
Select ramp-function generator:
0: Basic ramp-function generator
1: Extended ramp-function generator
p1120
Ramp-function generator, ramp-up time (factory setting: 10 s)
Accelerating time in seconds from zero speed up to the maximum speed p1082
p1121
Ramp-function generator, ramp-down time (factory setting: 10 s)
Braking time in seconds from the maximum speed down to standstill
p1135
OFF3 ramp-down time (factory setting: 0 s)
The quick stop (OFF3) has its own ramp-down time.
Changing the ramp-up and ramp-down times in operation
The ramping up and down time of the ramp-function generator can be changed during
operation. The scaling value can come, e.g. from the fieldbus.
Table 6- 29 Parameters for setting the scaling
Parameter
Description
p1138
Up ramp scaling (factory setting: 1)
Signal source for scaling the acceleration ramp.
p1139
Deceleration ramp scaling (factory setting: 1)
Signal source for scaling the deceleration ramp.
Application example
In the following application example, the higher-level control sets the ramp-up and ramp-
down times of the inverter via PROFIBUS.
Figure 6-33 Application example for changing the ramp-function generator times in operation
