Siemens SINAMICS G120 Operating Instructions Manual page 273

Parameter
p2350
p2354
p2355
Converter with the CU240B-2 and CU240E-2 Control Units
Operating Instructions, 01/2017, FW V4.7 SP6, A5E34259001B AD
Remark
Enable PID autotuning (factory setting: 0)
Automatic controller setting based on the "Ziegler Nichols" method.
After completion of the autotuning, the inverter sets p2350 = 0.
0: No function
1: Controller setting after completion of the autotun‐
ing:
The process variable follows the setpoint after a
sudden setpoint change (step function) relatively
quickly, however with an overshoot.
2: Faster controller setting than for p2350 = 1 with
larger overshoot of the controlled variable.
3: Slower controller setting than for p2350 = 1. Over‐
shoot of the controlled variable is, to a large ex‐
tent, avoided.
4: Controller setting after completion of the autotun‐
ing as for p2350 = 1. Optimize only the P and I
action of the PID controller.
PID autotuning monitoring time (factory setting: 240 s)
Monitoring time for the process response.
p2354 must be greater than half the period of the process variable oscillation.
PID autotuning offset (factory setting: 5%)
Autotuning offset.
p2355 must be sufficiently large so that the amplitude of the process variable oscil‐
lation signal can be differentiated from any superimposed noise.
Advanced commissioning
6.17 PID technology controller
273