Siemens CU240B-2 - Page 235

Advanced commissioning
6.4 Setpoint calculation
Converter with the CU240B-2 and CU240E-2 Control Units
Operating Instructions, 01/2016, FW V4.7 SP6, A5E34259001B AC
235
Basic ramp-function generator
When compared to the extended ramp
-
function generator, the basic ramp
-
function generator has no rounding
times.
Table 6- 31 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- 32 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.