Siemens SINAMICS V20 - Page 306

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.