Line And Dc Link Identification - Siemens SINAMICS S120 Function Manual

Infeed
Smart Infeed
1.2.2

Line and DC link identification

The characteristic line supply and DC link quantities are determined using the auto-
matic parameter identification routine. They provide the basis to optimally set the
controllers in the Line Module.
Note
If the line supply environment changes, or the components connected to the DC
link (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 an optimum controller setting.
When the identification function is activated, alarm A06400 is output.
Caution
For Smart Line Modules, Chassis type, the line supply and DC link identification
routine is not permissible.
Identification methods
For additional identification methods, see the List Manual.
S p3410 = 4: An identification run for the total inductance and DC link capacitance
is 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 device (p6320,
p6322). 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.
S p3410 = 5: The same measurements and write operations are always
carried-out for p3410 = 4. However, before the first identification run, the
parameter values for line inductance and DC link capacitance are reset (p3421
= p0223 and p3422 = p0227) and the coarse settings are made for the
controller.
p3410 is automatically set to 0 after an identification run has been successfully
completed.
Note:
The identification using p3410 = 5 is the preferred method.
Closed-loop control may, for example, have to be reset to the factory setting if
the identification process is unsuccessful.
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© Siemens AG 2006 All Rights Reserved
SINAMICS S120 Function Manual, 03/2006 Edition