Siemens SINAMICS G120X, Руководство по эксплуатации

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p1240[0...n] Vdc controller configuration (vector control) / Vdc ctr config vec
Access level: 3 Calculated: - Data type: Integer16
Can be changed: T, U Scaling: - Dynamic index: DDS, p0180
Unit group: - Unit selection: - Function diagram: 6220, 6827
Min:
0 Max:
3 Factory setting:
1
Description: Sets the controller configuration of the DC link voltage (Vdc controller) in the closed-loop control mode. For U/f control:
see p1280.
Value: 0: Inhibit Vdc ctrl
1: Enable Vdc_max controller
2: Enable Vdc_min controller (kinetic buffering)
3: Enable Vdc_min controller and Vdc_max controller
Dependency: See also: p1245
See also: A07400, A07401, A07402, F07405, F07406
NOTICE
An excessively high value in p1245 can possibly negatively influence the normal operation of the drive.
Note
If a braking resistor is connected to the DC link (p0219 > 0), then the Vdc_max control is automatically deactivated.
p1240 = 1, 3:
When the DC link voltage limit specified for the power unit is reached the following applies:
- the Vdc_max controller limits the regenerative energy in order that the DC link voltage is kept below the maximum DC
link voltage when braking.
- the ramp-down times are automatically increased.
p1240 = 2, 3:
When the switch-in threshold of the Vdc_min controller is reached (p1245), the following applies:
- the Vdc_min controller limits the energy taken from the DC link in order to keep the DC link voltage above the minimum
DC link voltage when accelerating.
- the motor is braked in order to use its kinetic energy to buffer the DC link.
r1242 Vdc_max controller switch-in level / 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: 6220
Min:
- [V] Max:
- [V] Factory setting:
- [V]
Description: Displays the switch-in level for the Vdc_max controller.
If p1254 = 0 (automatic sensing of the switch-in level = off), then the following applies:
r1242 = 1.15 * sqrt(2) * p0210 (supply voltage)
PM230: r1242 is limited to Vdc_max - 50.0 V.
If p1254 = 1 (automatic sensing of the switch-in level = on), then the following applies:
r1242 = Vdc_max - 50.0 V (Vdc_max: Overvoltage threshold of the power unit)
r1242 = 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 * r1242 and the
controller output is zero.
Parameters
7.2 Parameter list
SINAMICS G120X converter
Operating Instructions, 06/2019, FW V1.01, A5E44751209B AC
655