Siemens SINAMICS G120C Operating Instructions Manual page 261

4. Wait until alarm A07444 goes away.
The inverter has recalculated parameters p2280, p2274 and p2285.
If the inverter signals fault F07445, then increase p2354 and repeat the autotuning.
5. Back up the calculated values so that they are protected against power failure, e.g. using
the BOP-2: OPTIONS → RAM-ROM.
You have auto tuned the PID controller.
Parameter
p2350
p2354
p2355
SINAMICS G120C converter
Operating Instructions, 07/2015, FW V4.7 SP3, A5E34263257B AC
Remark
PID Autotune Enable (Factory setting: 0)
0: No function
1: Autotuning based on the "Ziegler Nichols" tech-
nique. The controlled variable follows the set-
point relatively quickly after a step-like setpoint
change, however with some overshoot.
2: Faster controller setting than setting 1, with a
higher overshoot of the controlled variable.
3: Slower controller setting then setting 1. Over-
shoot of the controlled variable is, to a large
extent, avoided.
4: The autotuning only optimizes the P and I com-
ponent of the PID controller.
PID tuning timeout length (Factory setting: 240 s)
Max. wait time until the autotuning must have identified the control loop oscillating.
PID tuning offset (Factory setting: 5 %)
Offset and deviation for autotuning
Advanced commissioning
6.7 Application-specific functions
257