Siemens SINAMICS V20 Inverter, Operating Instructions Manual

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Parameter list
8.2 Parameter list
SINAMICS V20 Converter
304
Operating Instructions, 10/2019, A5E34559884-012
Parameter Function Range Factory
default
Can be
changed
Scaling Data
set
Data
type
Acc.
Level
P2350 PID autotune enable 0 - 4 0 U, T - - U16 2
Enables autotune function of PID controller.
0 PID autotuning disabled
1 PID autotuning via Ziegler Nichols (ZN) standard
2 PID autotuning as 1 plus some overshoot (O/S)
3 PID autotuning as 2 little or no overshoot (O/S)
4 PID autotuning PI only, quarter damped response
Dependency: Active when PID loop is enabled (see P2200).
Note:
• P2350 = 1
This is the standard Ziegler Nichols (ZN) tuning which should be a quarter damped response to a step.
•
P2350 = 2
This tuning will give some overshoot (O/S) but should be faster than option 1.
• P2350 = 3
This tuning should give little or no overshoot but will not be as fast as option 2.
•
P2350 = 4
This tuning only changes values of P and I and should be a quarter damped response.
The option to be selected depends on the application but broadly speaking option 1 will give a good re-
sponse, whereas if a faster response is desired option 2 should be selected.
If no overshoot is desired then option 3 is the choice. For cases where no D term is wanted then option 4
can be selected.
The tuning procedure is the same for all options. It is just the calculation of P, I, and D values that are
different.
After autotune this parameter is set to zero (autotune completed).
P2354
PID tuning timeout length [s]
60 - 65000
240 U, T - - U16 3
This parameter determines the time that the autotuning code will wait before aborting a tuning run if no
oscillation has been obtained.
P2355 PID tuning offset [%] 0.00 - 20.00 5.00 U, T - - Float 3
Sets applied offset and deviation for PID autotuning.
Note: This can be varied depending on plant conditions e.g. a very long system time constant might require a
larger value.