09.02  Start-Up 
Siemens AG    6SE7087-6AK85-1AA0 
4-37 
Rectifier/Regenerating Unit    Operating Instructions 
4.3.9.2  Initialization (MLFB setting)   (P052 = 2) 
This function is used to change the rectifier/regenerating unit MLFB (type setting). 
The parameters P071, P075 and P076 are only set dependent on the new MLFB when changing the MLFB
 . 
 
"Initialization" can be selected in the following statuses: "Switch-on inhibit" (008), "Ready-to-switch-on" (009) or 
"Fault" (007). 
 
Procedure:
 
⇓  P051 = 3  Access stage "Expert mode" to permit access to P070 
 
⇓  P052 = 2  Function selection "Initialization" 
 
⇓  P070  Specification of the number of the MLFB of the rectifier/regenerating unit 
(rating plate data on the unit) according to the table at the end of this Section. 
 
⇓  P052 = 0  Terminate the function "Initialize" 
 
⇓  P key  The operating display appears and once the MLFB has been modified
, the 
following parameters are reassigned in accordance with the MLFB: 
      P071  Rated voltage at the input to the rectifier bridge 
  P075  Rated DC current 
  P076  Only the ones position is modified 
    Ones position = 2, when rectifier and regenerating mode is 
possible 
    Ones position = 1, when only rectifier mode is possible 
    (only set when P070 ≥ 101) 
 
⇓  The operating display "Switch-on inhibit" (008) or "Ready-to-switch-on" (009) appears after 
"Initialization" has been completed 
 
MLFB table: 
Brief description of the table columns: 
PWE  Parameter value (to be entered at initialization / PMU / P070) 
MLFB  Machine-readable product designation (see rating plate) 
I(n)  Rated DC current in A  (P075) 
U-Kl.  Voltage class, voltage range 
BF  Type of construction 
 
PWE  MLFB  Rated current 
[A] 
Supply voltage 
[V] 
BF 
0 none  0,0  0  0 
14 6SE7022-1EC85-1AA0  21,0  3AC 380-480  C 
15 6SE7022-7FC85-1AA0  27,0  3AC 500-600  C 
20 6SE7024-1EC85-1AA0  41,0  3AC 380-480  C 
21 6SE7024-1FC85-1AA0  41,0  3AC 500-600  C 
28 6SE7027-2FC85-1AA0  72,0  3AC 500-600  C 
31 6SE7028-6EC85-1AA0  86,0  3AC 380-480  C 
32 6SE7028-8FC85-1AA0  94,0  3AC 500-600  C 
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