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05
06
11
12
13
14
15
17
18
19
20
Note
For bit 17:
Displays the enabled status of the rugged model feedback (p1784).
The feedback is used to increase the parameter ruggedness of the motor model and is effective in the operating range
of the two-component closed loop current control.
For bit 18:
Displays the status when enabling the differential current feedback in the current model for operation with encoder.
The function is automatically enabled with p1784 > 0 or p1731 > 0. The feedback is used for a rugged change between
the current model and complete machine model with active rugged model feedback and combination current.
For bit 19:
Displays the currently active stator circuit feedback in current model operation.
For bit 20:
Displays the currently effective increase of the changeover limits by the value p1749 * p1755.
For bit 21:
For a blocked synchronous motor, the speed ramp-function generator is held in the open-loop speed controlled
operating range if the torque setpoint reaches the torque limit and the speed is less than the threshold value in p2175.
p1755[0...n]
Motor model changeover speed encoderless operation / MotMod n_chgSnsorl
Access level: 3
Can be changed: T, U
Unit group: 3_1
Min:
0.00 [rpm]
Description:
Sets the speed to change over the motor model to encoderless operation.
Dependency:
See also: p1749, p1756
NOTICE
The changeover speed represents the steady-state minimum speed up to which the motor model can be used in
sensorless steady-state operation.
If the stability is not adequate close to the changeover speed, it may make sense to increase the parameter value. On
the other hand, very low changeover speeds can negatively impact the stability.
Note
The changeover speed applies for the changeover between open-loop and closed-loop control mode.
p1756
Motor model changeover speed hysteresis encoderless operation / MotMod n_chgov hys
Access level: 3
Can be changed: T, U
Unit group: -
Min:
0.0 [%]
SINAMICS G120X converter
Operating Instructions, 06/2019, FW V1.01, A5E44751209B AC
Holding angle
Acceleration criterion
Speed controller output cannot be set to zero
Rs adapt waits
Motor operation
Stator frequency sign
Torque sign
Operation with rugged model feedback
Operation of the current model with current feedback
Current feedback in the current model
Rugged increase of the changeover limits
Yes
Active
Yes
Yes
Yes
Positive
Motor mode
Enabled
Enabled
Active
Active
Calculated: CALC_MOD_REG Data type: FloatingPoint32
Scaling: -
Unit selection: p0505
Max:
210000.00 [rpm]
Calculated: CALC_MOD_REG Data type: FloatingPoint32
Scaling: -
Unit selection: -
Max:
95.0 [%]
Parameters
7.2 Parameter list
No
-
Inactive
-
No
-
No
-
No
-
Negative
-
Regenerative
-
mode
Inhibited
-
Inhibited
-
Inactive
-
Inactive
-
Dynamic index: DDS, p0180
Function diagram: -
Factory setting:
210000.00 [rpm]
Dynamic index: -
Function diagram: 6730, 6731
Factory setting:
50.0 [%]
705
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