Siemens Sinamics S120 Function Manual page 171

Description of Vdc_max control
Figure 4-17
The switch-in level for Vdc_max control (r1242) is calculated as follows:
● When the function for automatically detecting the switch-in level is switched off (p1254 =
● When the function for automatically detecting the switch-in level is switched on (p1254 =
Drive functions
Function Manual, (FH1), 01/2012, 6SL3097-4AB00-0BP2
Switching Vdc_max control on/off
0)
r1242 = 1.15 * p0210 (device connection voltage, DC link).
1)
r1242 = Vdc_max - 50 V (Vdc_max: overvoltage threshold of the Motor Module)
Vector control
4.10 Vdc control
169