Siemens SINAMICS G120C DP

8.19.1 Autotuning the PID technology controller
Overview
Autotuning is a converter function for the automatic optimization of the PID technology
controller.
Requirement
The following requirements apply:
• The motor closed-loop control is set
• The PID technology controller must be set the same as when used in subsequent operation:
– The actual value is interconnected.
– Scalings, 󹪝lter and ramp-function generator have been set.
– The PID technology controller is enabled (p2200=1 signal).
Function description
For active autotuning, the converter interrupts the connection between the PID technology
controller and the speed controller. Instead of the PID technology controller output, the
autotuning function speci󹪝es the speed setpoint.
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Figure8-44 Autotuning using closed-loop level control as example
The speed setpoint results from the technology setpoint and a superimposed rectangular
signal with amplitude p2355. If actual value = technology setpoint ± p2355, the autotuning
function switches the polarity of the superimposed signal. This causes the converter to excite
the process variable for an oscillation.
Advanced commissioning
8.19PID technology controller
SINAMICS G120C Converters
296 Operating Instructions, 02/2023, FW V4.7 SP14, A5E34263257B AK