Siemens CU240S DP-F - Page 97

Commissioning (software)
5.7 Commissioning modes
Control Units CU240S
Operating Instructions, 11/2006, A5E00766042B AA
5-41
Skip Frequency
Parameter Description (Parameter name and factory setting (if not variable) in bold) Setting
P1091 = 7.5 Skip frequency 1 (entered in Hz)
Avoids mechanical resonance effects and suppresses (skips)
frequencies in the range around the skip frequency ± P1101
(skip frequency bandwidth).
P1092 = 0.0 Skip frequency 2
P1093 = 0.0 Skip frequency 3
P1094 = 0.0 Skip frequency 4
P1101 = 1.0 Skip frequency bandwidth (entered in Hz)
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Ramp times
Parameter Description (Parameter name and factory setting (if not variable) in bold) Setting
P1120 = 10 Ramp-up time
Enter the acceleration time in seconds.
P1121 = 10 Ramp-down time
Enter the deceleration time in seconds.
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Rounding
Parameter Description (Parameter name and factory setting (if not variable) in bold) Setting
P1130 = 5.0 Ramp-up initial rounding time (in seconds)
P1131 = 5.0 Ramp-up final rounding time (in seconds)
P1132 = 5.0 Ramp-down initial rounding time (in seconds)
P1133 = 5.0 Ramp-down final rounding time (in seconds)
P1134 = 0 Rounding type
0: continuous smoothing (jerk-free)
1: Discontinuous smoothing
NOTE: for discontinuous rounding (P1134 = 1),
after the setpoint is reduced or an OFF1
command, the final rounding at ramp-up (P1131)
and the initial rounding at ramp-down (P1132)
are not executed.
The rounding times are recommended, as
abrupt responses can be avoided therefore
reducing stress and damage to the
mechanical system.
The ramp-up and ramp-down times are
extended by the component of the rounding
ramps.