Pi/P Switching - Siemens SINAMICS V90 Operating Instructions Manual

Tuning

9.9 PI/P switching

Timing diagram
9.9 PI/P switching
Note
PI/P switching
Function of PI/P switching is not available for the T mode (torque control mode).
The functions of auto-tuning and gain switching must be disabled so that the function of PI/P
switching can be available.
The PI/P switching will respond with a delay time of several milliseconds.
The function of PI/P switching is used to switch from PI (Proportional/Integral) control of
speed controller to P (Proportional) control. With this function, you can:
● shorten the position setting time (for the position control mode).
● avoid overshooting of actual speed value during acceleration or deceleration (for the
speed control mode).
● avoid unnecessary torque when the target position is at a mechanical limitation (for the
position control mode).
Selection of a switching mode for PI/P switching
Five switching modes in total are available for PI/P switching:
● using torque setpoint
● using an external digital input signal (G-CHANGE)
● using speed setpoint
● using acceleration setpoint
● using pulse deviation
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SINAMICS V90, SIMOTICS S-1FL6
Operating Instructions, 09/2016, A5E36037884-002