Siemens Sinamics S120 Function Manual page 229

Description of Vdc_max control
Figure 5-9
The switch-in level for Vdc_max control (r1282) is calculated as follows:
p1294 (automatic detection of the
ON level (U/f))
Value
= 0
= 1
Drive functions
Function Manual, (FH1), 01/2012, 6SL3097-4AB00-0BP2
Switching Vdc_max control on/off
Switch-on level of the
Vdc_max control (r1282)
Meaning
Switched out r1282 = 1.15 × p0210
Switched in r1282 = Vdc_max - 50 V
U/f control (vector control)
5.4 Vdc control
Comment
p0210 ≙ device supply voltage
Vdc_max ≙ overvoltage
threshold of the Motor Module
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