Tuning
9.9 PI/P switching
SINAMICS V90, SIMOTICS S-1FL6
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Operating Instructions, 04/2019, A5E36037884-007
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)
