Siemens SINAMICS SM150

Parameter Setting
p1075 Supplementary setpoint
p1076 Supplementary setpoint scaling
r1077 Supplementary setpoint effective
r1078 Total setpoint effective
These parameters concern connector inputs to which the setpoint values are connected.
Function diagram
FP 3030
Skip frequency bands and minimum speed
Variable-speed drives can generate critical whirling speeds within the control range of the
entire drive train. This prevents steady-state operation in their proximity, that is,
the range of critical whirling speeds can still be passed through. The drive, however, must not
remain here because this can cause excitation of the sympathetic oscillations.
The suppression bandwidths allow this range to be blocked for steady-state operation.
Because the points at which critical whirling speeds occur in a drive train can vary depending
on age or thermal factors, a broader control range should be blocked. To ensure that the speed
does not constantly increase and decrease in the suppression bandwidth (speeds), the bands
are assigned a hysteresis.
Specify a minimum speed in order to block a specific range around the stopped state for
stationary operation.
Table 8-1 Parameter
Parameter Setting
p1091 Suppression speed 1
p1092 Suppression speed 2
p1093 Suppression speed 3
p1094 Suppression speed 4
p1101 Suppression speed bandwidth
p1080 Minimum speed
r1112 Speed setpoint after minimum limiting
You can find additional information in function diagrams 1550 and 3050.
Operation
8.4 Functions
SINAMICS SM150 6SL3845-7NN46-7AA0
128 Operating Instructions 04/2017