Start-Up 09.02
4-32 Siemens AG 6SE7087-6AK85-1AA0
Rectifier/Regenerating Unit Operating Instructions
• Configuring examples:
Example
1: Available: P071 (line voltage) = 400 V
Required: Map the actual DC link voltage r037 between 400 and 600 V to 0.00V to
+10.00 V at the analog output
♦ Connect-up parameter R037 at the analog output:
P655 "CUR-AA actual values" = 037
♦ Converter the required output range in [%]:
r037 should be taken from the parameter list, Section 5:
Analog output: 100% = 1.35 x P071 (in this case: 1.35 x 400 V = 540 V)
Thus, the following is obtained for the range to be represented:
400 V → 74.05% (Parameter value PWE1) to be represented as U
off1
= 0.00 V
600 V → 111.07% (Parameter value PWE2) to be represented as U
off2
= +10.00 V
♦ Define gain factor
P656 and offset P657:
The following is obtained from the formula shown above:
[]
()
[] []
[]
[]
[]
[]
V 98.19
% 100
% 74.05 V 27.03
V0
% 100
% 74.05 V 27.03
0V
% 100
%PWE Vfactor Gain
V U=V Offset
V27.03
% 37
100 V10,00
% 111.07% 74.05
%100 V)10.00 V (0.00
%PWE %PWE
%100 VU VU
V factor Gain
1
off1
2 1
off2 off1
−=
⎟
⎠
⎞
⎜
⎝
⎛
×
−=
⎟
⎠
⎞
⎜
⎝
⎛
×
−=
⎟
⎠
⎞
⎜
⎝
⎛
×
−
=
−
×−
=
−
×−
=
−
×−
=
To be adjusted: gain:
P656 = +27,03V
offset:
P657 = −19,98V
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