09.02 Start-Up
Siemens AG 6SE7087-6AK85-1AA0
4-33
Rectifier/Regenerating Unit Operating Instructions
Example 2: Available: P075 (rated DC current) = 420 A
Required: Map the output current r035 between -630 and +630 A to -10.00 V to
+10.00 A at the analog output
♦ Connect-up parameter r035 at the analog output:
P655 "CUR-AA actual values“ = 035
♦ Convert the required output range in [%]:
r035 should be taken from the parameter list, Section 5:
Analog output: 100% = P075
Thus, the following is obtained for the range to be represented:
-630 A → -150% (Parameter value PWE1) represented as V
off1
= -10.00 V
+630 A → 150% (Parameter value PWE2) represented as V
off2
= +10.00 V
♦ Define gain factor
P656 and offset P657:
The following is obtained from the formula shown above:
[]
)
[] []
[]
[]
[]
[]
()
V 0.00 V0.001 V10
% 100
% 150.00- V 6.67
10V
% 100
%PWE Vfactor Gain
V U =V Offset
V6.67
% 300
% 100 V20.00
% 150% 150-
%100 V)10.00 V 10.00(
%PWE %PWE
%100 VU VU
V factor ainG
1
off1
2 1
off2 off1
=+−=
⎟
⎠
⎞
⎜
⎝
⎛
×
−−=
⎟
⎠
⎞
⎜
⎝
⎛
×
−
=
−
×−
=
−
×−−
=
−
×−
=
To be adjusted: Gain
P656 = +6,67 V
offset
P657 = 0,00 V
AoteWell Automation Sales Team
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