Siemens SINAMICS S120 Function Manual page 144

Vector control
4.9 Vdc control
Description of Vdc_max control
Figure 4-16
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=0)
● When the function for automatically detecting the switch-in level is switched on (p1254=1)
Function diagrams (see SINAMICS S120/S150 List Manual)
● 6220 Vdc_max controller and Vdc_min controller
Overview of important parameters (see SINAMICS S120/S150 List Manual)
● p1240[0...n] Vdc controller or Vdc monitoring configuration
● r1242 Vdc_max controller switch-in level
● p1243[0...n] Vdc_max controller dynamic factor (control)
● p1245[0...n] Vdc_min controller switch-in level (kinetic buffering) (control)
● r1246 Vdc_min controller switch-in level (kinetic buffering) (control)
● p1247[0...n] Vdc_min controller dynamic factor (kinetic buffering) (control)
● p1250[0...n] Vdc controller proportional gain (control)
● p1251[0...n] Vdc controller integral time (control)
● p1252[0...n] Vdc controller derivative-action time (control)
● p1254 Vdc_max controller automatic detection ON level (control)
● p1256[0...n] Vdc_min controller response (kinetic buffering) (control)
● p1257[0...n] Vdc_min controller speed threshold (controller)
● r1258 CO: Vdc controller output (control)
144
Switching Vdc_max control on/off
r1242 = 1.15 * p0210 (device connection voltage, DC link).
r1242 = Vdc_max - 50 V (Vdc_max: overvoltage threshold of the Motor Module)
Function Manual, (FH1), 10/2008, 6SL3097-2AB00-0BP5
Drive functions