Line And Dc Link Identification - Siemens SINAMICS S120 Function Manual

Infeed
1.1 Active Infeed
1.1.5

Line and DC link identification

The characteristic line supply and DC link quantities are determined using the automatic
parameter identification routine. They provide the basis to optimally set the controllers in the
Line Module.
An optimal setting of the current and voltage control is achieved with the help of the line
supply and DC link identification routine. The dynamic response of the current control can be
adjusted with p3560.
Note
If the line supply environment changes, or the components connected to the DClink (e.g.
after installing and mounting the equipment at the customer's site or after expanding the
drive group), then the line supply/DC link identification routine should be repeated with
p3410 = 5. Only then can it be guaranteed that the infeed operates with the optimum
controller settings.
When the identification function is activated, alarm A06400 is output.
Identification methods
For additional identification methods, see the SINAMICS S List Manual.
● p3410 = 4: An identification run for the total inductance and DC link capacitance is
● p3410 = 5: The same measurements and write operations are always carried-out for
Note
Identification using p3410 = 5 should preferably be used.
Overview of key parameters (see SINAMICS S List Manual)
● p3410 Infeed identification method
● r3411 Infeed inductance identified
● r3412 Infeed DC-link capacitance identified
● p3560 Infeed Vdc controller proportional gain
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initiated when the pulses are next enabled (two measuring routines with different current
magnitudes). Data determined during identification (r3411 and r3412) is entered into
p3421 and p3422 and the controller is recalculated. At the same time, the parameters for
current controller adaptation are determined (p3620, p3622). All of the parameters for the
Infeed Module are then automatically stored in a non-volatile memory.
The infeed continues to operate without any interruption with the new controller
parameters.
p3410 = 4. Before the first identification run, however, the parameter values for line
inductance and DC link capacitance are reset (p3421 = p0223 and p3422 = p0227).
p3410 is automatically set to 0 after an identification run has been successfully
completed.
It may be necessary to reset the closed-loop controller to the factory settings if an
identification run was unsuccessful, for example.
Function Manual, (FH1), 07/2007 Edition, 6SL3097-2AB00-0BP4
Drive Functions