Siemens Sinamics G120 Series - p2295 Gain applied to PID output; PID output scale; p2350 PID autotune enable; PID autotune; p2354 PID tuning timeout length; PID tuning t;o.

List of Parameters
Parameters
1-251
© Siemens AG 2007 All Rights Reserved
SINAMICS G120 Control Units CU240S, Edition 05/2007
Description: Allows the user to scale the PID output as a percentage value [%].
A gain of 100.0 % means that output signal has not changed from its default value.
Description: Enables autotune function of PID controller.
Values: 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 respsonse,
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 and D values that is different.
After autotune this parameter is set to zero (autotune completed).
Description: This parameter determines the time that the autotuning code will wait before aborting a tuning run if no oscillation
has been obtained.
p2295 Gain applied to PID output / PID output scale
Access level: 3 P-Group: Technology Data type: Floating Point
Quick comm. NO Active: YES Data set: -
Can be changed: U, T
Min Max Factory setting
-100.00 100.00 100.00
p2350 PID autotune enable / PID autotune
Access level: 2 P-Group: Technology Data type: Unsigned16
Quick comm. NO Active: YES Data set: -
Can be changed: U, T
Min Max Factory setting
0 4 0
p2354 PID tuning timeout length / PID tuning t/o.
Access level: 3 P-Group: Technology Data type: Unsigned16
Quick comm. NO Active: YES Data set: -
Can be changed: U, T
Min Max Factory setting
60 [s] 65000 [s] 240 [s]