Siemens SINAMICS S120 Function Manual page 198

Vector control
4.10 Vdc control
Vdc_max control
Figure 4-16
The switch-on level for Vdc_max control (r1242) is calculated as follows:
● When the function for automatically detecting the switch-on level is switched off
● When the function for automatically detecting the switch-on level is switched on
196
Switching Vdc_max control on/off
(p1254 = 0)
r1242 = 1.15 * p0210 (device connection voltage, DC link).
(p1254 = 1)
r1242 = Vdc_max - 50 V (Vdc_max: Overvoltage threshold of the Motor Module)
Function Manual, (FH1), 01/2013, 6SL3097-4AB00-0BP3
Drive functions