Siemens SINAMICS G120 List Manual page 195

r1078 CO: Total setpoint effective / Total setpoint eff
Access level: 3
Can be changed: -
Unit group: 3_1
Min
- [rpm]
Description: Displays the total effective setpoint.
The value indicates the sum of the effective main setpoint and supplementary setpoint.
p1079 Interpolator clock cycle for speed setpoints / Interp_cyc n_set
CU250S_V_CAN Access level: 3
CU250S_V_DP
Can be changed: U, T
CU250S_V_PN
Unit group: -
Min
0.00 [ms]
Description: Sets the time with which new speed setpoints are interpolated.
With interpolation, the higher-level control adapts the speed setpoint steps to the time grid of the setpoint channel.
Recommendation: For non-synchronous operation, a setting to the maximum time difference between two setpoints is recommended.
For sensorless vector control, interpolation should always be activated if the ramp-up and ramp-down times of the
ramp-function generator are very short. The drive must be able to follow the external speed setpoint (the drive does
not ramp up at the torque limit).
Note: For acceleration precontrol of the speed controller, interpolation prevents torque peaks from occurring if the ramp-up
or ramp-down times in the setpoint channel are zero.
When exiting commissioning, the parameter is preset using the automatic calculation if, as setpoint source for the
main or supplementary setpoint, a PZD receive word is already set and the ramp-up time is zero.
Interpolation is limited to 127 cycles of the setpoint channel.
p1079 = 0 ms: interpolation is deactivated.
p1079 = 0.01 ms: the interpolation is automatically determined the first time that the speed setpoint is changed. After
this, no other changes are made if the send times of the external control increase. Writing to p1079 again initiates the
automatic adaptation of the interpolation time.
p1079 > 0.01 ms: interpolation is performed corresponding to the ratio to the computation clock cycle.
p1080[0...n] Minimum speed / n_min
Access level: 1
Can be changed: C(1), T
Unit group: 3_1
Min
0.000 [rpm]
Description: Sets the lowest possible motor speed.
This value is not undershot in operation.
Dependency: Refer to: p1106
Notice: The effective minimum speed is formed from p1080 and p1106.
Note: The parameter value applies for both motor directions.
In exceptional cases, the motor can operate below this value (e.g. when reversing).
p1081 Maximum speed scaling / n_max scal
Access level: 2
Can be changed: U, T
Unit group: -
Min
100.00 [%]
Description: Sets the scaling for the maximum speed (p1082).
For a higher-level speed control, this scaling allows the maximum speed to be briefly exceeded.
SINAMICS G120 CU250S-2 Control Units
List Manual, 09/2017, A5E33842890
Calculated: -
Scaling: p2000
Unit selection: p0505
Max
- [rpm]
Calculated: p0340 = 1
Scaling: -
Unit selection: -
Max
127.00 [ms]
Calculated: -
Scaling: -
Unit selection: p0505
Max
19500.000 [rpm]
Calculated: -
Scaling: PERCENT
Unit selection: -
Max
105.00 [%]
2 Parameters
2.2 List of parameters
Data type: FloatingPoint32
Dyn. index: -
Func. diagram: 3030
Factory setting
- [rpm]
Data type: FloatingPoint32
Dyn. index: -
Func. diagram: -
Factory setting
0.00 [ms]
Data type: FloatingPoint32
Dyn. index: DDS, p0180
Func. diagram: 3050, 8022
Factory setting
0.000 [rpm]
Data type: FloatingPoint32
Dyn. index: -
Func. diagram: 3050, 3095
Factory setting
100.00 [%]
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