In the event of a wire break on the encoder system the drive is shut down in sensorless mode on the preset quick-stop ramp. Due to the lack of dynamism at low speeds, the sensorless control is very "imprecise". To enable the drive nevertheless to be run down smoothly to speed 0, as from the speed threshold parameterized in P 0355(0) the controller switches to a current/frequency (IF) control. For stabilization, an additional parameterizable d-current must be injected via P 0355(1). The speed controller gain is reduced by the factor P 0355(2).
Bild: Sensorless quick-stop
Parameters
| P no. | Parameter name | Function |
|---|---|---|
| P 0355 | CON_SCALC_SensorlessStop | Configuration of sensorless quick-stop |
| (0) | LowSpeedLimit(0) | Speed threshold |
| (1) | d-current IF control | Additive d-current |
| (2) | SpeedControlGainScale | Scaling of speed gain |
| P 0030 | ErrorReactions | Error reaction |
| (35) | Reac_EncObs | Error 35 Wire break detection on encoder |
| P2242 | MPRO_402_QuickStopDec |
Quick-stop ramp |
Tabelle: Setting for sensorless quick-stop
Copyright © LTi DRiVES GmbH, Januar 2013, ID-Nr.: 0842.26B.1-00 DE