Operating instructions

Functions
5.6 Setpoint preparation
CU240S and CU240E Control Units, FW 3.2
108 Operating Instructions, 03/2009, A5E02440075B AA
Rounding
Acceleration can be "smoothed" further by means of rounding. The jerk occurring when the
motor starts and when it begins to decelerate can be reduced independently of each other.
Rounding can be used to lengthen the motor acceleration/deceleration times. The ramp-
up/down time parameterized in the ramp-function generator is exceeded.
Rounding does not affect the ramp-down time in the event of a quick stop (OFF3).
Table 5- 29 Rounding parameters
Parameter Description
P1130 = … Initial rounding time for ramp up (in seconds)
P1131 = … Final rounding time for ramp up (in seconds)
P1132 = … Initial rounding time for ramp down (in seconds)
P1133 = … Final rounding time for ramp down (in seconds)
P1134 = … Rounding type
For more information about this function, see the List Manual (function diagram 5300 and the
parameter list).