Siemens SINAMICS G120XA - Closed-Loop Cascade Control Enable; Csc_Ctrl Enab; PID Autotuning Monitoring Time; PID Tuning T_Monit; PID Autotuning Offset; PID Autotun.offset

Note
P2350 = 1
This is the Ziegler-Nichols standard tuning (ZN tuning). In this case, it should involve a response to a step.
P2350 = 2
For this tuning, a low overshoot is obtained (O/S). However, it should be faster than option 1.
P2350 = 3
For this tuning, a low or no overshoot is obtained. However, it is not as fast as option 2.
P2350 = 4
For this tuning, only values P and I are changed, and it should involve a dampened response.
Which option should be selected depends on the particular application. It can be generally stated that option 1
manifests a good response. However, if a faster response is required, then option 2 should be selected.
If no overshoot is desirable, then option 3 should be the preferred choice.
Option 4 should be selected for cases in which no D component is required.
The tuning technique is identical for all options.
Only the P, I and D values are calculated differently.
This parameter is set to zero after automatic tuning has been completed.
p2354 PID autotuning monitoring time / PID tuning t_monit
Access level: 3 Calculated: - Data type: Unsigned16
Can be changed: T Scaling: - Dynamic index: -
Unit group: - Unit selection: - Function diagram: -
Min:
60 [s]
Max:
65000 [s]
Factory setting:
240 [s]
Description: Sets the monitoring time for the PID autotuning
This time is started after activating PID autotuning (p2350). If, within this time, the control loop is not excited, then the
automatic setting is canceled and an appropriate fault is output.
Dependency: See also: p2350
See also: F07445
p2355 PID autotuning offset / PID autotun.offset
Access level: 3 Calculated: - Data type: FloatingPoint32
Can be changed: T Scaling: - Dynamic index: -
Unit group: - Unit selection: - Function diagram: -
Min:
0 [%]
Max:
20 [%]
Factory setting:
5 [%]
Description: This parameter is used to set the excitation type of the PID control loop to be used.
p2370[0...n] Closed-loop cascade control enable / Csc_ctrl enab
Access level: 3 Calculated: - Data type: Integer16
Can be changed: T Scaling: - Dynamic index: DDS, p0180
Unit group: - Unit selection: - Function diagram: -
Min:
0
Max:
1
Factory setting:
0
Description: Sets the signal source to switch in/switch out the closed-loop cascade control function.
1 signal: The function is switched in.
Value: 0: Closed-loop cascade control inhibited
1: Closed-loop cascade control enabled
Parameters
7.3 Parameters
SINAMICS G120XA converter
626 Operating Instructions, 03/2019, FW V1.0, A5E44751205B AB