Siemens SINAMICS G120X - VDC Controller Configuration; VDC Ctrl Config; Vdc_Max Controller Dynamic Factor (U;F); Vdc_Max Dyn_Factor; Vdc_Max Controller Switch-In Level (U;F); Vdc_Max On_Level

p1281[0...n] Vdc controller configuration / Vdc ctrl config
Access level: 3 Calculated: CALC_MOD_ALL Data type: Unsigned16
Can be changed: T, U Scaling: - Dynamic index: DDS, p0180
Unit group: - Unit selection: - Function diagram: -
Min:
-
Max:
-
Factory setting:
0000 bin
Description: Sets the configuration for the DC link voltage controller.
Bit field: Bit Signal name 1 signal 0 signal FP
00 Vdc min control (U/f) without up ramp Yes No -
02 Vdc min shorter wait time when the line returns Yes No -
Note
For bit 00:
Deactivate the ramp-up for Vdc_min control.
For drives with a mechanical system that can oscillate and high moment of inertia, the speed can be more quickly
tracked.
For bit 02:
When the line supply returns, normal operation is resumed earlier, and the system does not wait until the Vdc min
controller reaches the setpoint speed.
r1282 Vdc_max controller switch-in level (U/f) / Vdc_max on_level
G120X_DP
(Vdc_max),
G120X_PN
(Vdc_max),
G120X_USS
(Vdc_max)
Access level: 3 Calculated: - Data type: FloatingPoint32
Can be changed: - Scaling: p2001 Dynamic index: -
Unit group: - Unit selection: - Function diagram: 6320, 6854
Min:
- [V]
Max:
- [V]
Factory setting:
- [V]
Description: Displays the switch-in level for the Vdc_max controller.
If p1294 = 0 (automatic sensing of the switch-in level = off), then the following applies:
r1282 = 1.15 * sqrt(2) * p0210 (supply voltage)
If p1294 = 1 (automatic sensing of the switch-in level = on), then the following applies:
r1282 = Vdc_max - 50.0 V (Vdc_max: Overvoltage threshold of the power unit)
r1282 = Vdc_max - 25.0 V (for 230 V power units)
NOTICE
If the activation level of the Vdc_max controller is already exceeded in the deactivated state (pulse inhibit) by the DC
link voltage, then the controller can be automatically deactivated (see F07401), so that the drive is not accelerated the
next time that it is activated.
Note
The Vdc_max controller is not switched back off until the DC link voltage falls below the threshold 0.95 * r1282 and the
controller output is zero.
p1283[0...n] Vdc_max controller dynamic factor (U/f) / Vdc_max dyn_factor
G120X_DP
(Vdc_max),
G120X_PN
(Vdc_max),
G120X_USS
(Vdc_max)
Access level: 3 Calculated: CALC_MOD_CON Data type: FloatingPoint32
Can be changed: T, U Scaling: - Dynamic index: DDS, p0180
Unit group: - Unit selection: - Function diagram: 6320, 6854
Min:
1 [%]
Max:
10000 [%]
Factory setting:
100 [%]
Description: Sets the dynamic factor for the DC link voltage controller (Vdc_max controller).
100% means that p1290, p1291, and p1292 (gain, integral time, and rate time) are used in accordance with their basic
settings and on the basis of a theoretical controller optimization.
If subsequent optimization is required, this can be carried out using the dynamic factor. In this case, p1290, p1291, and
p1292 are weighted with the dynamic factor p1283.
Parameters
7.2 Parameter list
SINAMICS G120X converter
664 Operating Instructions, 06/2019, FW V1.01, A5E44751209B AC