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Operation
8.5 Functions
Parameter
p1075
p1076
r1077
r1078
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
p1091
p1092
p1093
p1094
p1101
p1080
r1112
You can find additional information in function diagrams 1550 and 3050.
112
Setting
Supplementary setpoint
Supplementary setpoint scaling
Supplementary setpoint effective
Total setpoint effective
Parameter
Setting
Suppression speed 1
Suppression speed 2
Suppression speed 3
Suppression speed 4
Suppression speed bandwidth
Minimum speed
Speed setpoint after minimum limiting
SINAMICS SM150 6SL3810-7NN38-0AA1
Operating Instructions Rev.201910281406 EXAMPLE
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