VFC 1/2 & hoist
VFC hoist only in parameter set 1. Disabling 4-quadrant operation (P820) is ignored.
In "VFC&Hoist" operating mode, the start/stop speed (P300 / P310) is set to the slip speed of the motor or is limited to at least 15 rpm.
The minimum speed (P301 / P311) is internally limited to 15 rpm in "VFC&Hoist" operating mode.
The hoist function automatically provides all functions necessary for operating an unbalanced hoist. In particular, monitoring functions are activated for safety reasons. These may prevent the drive from starting: These are:
- Monitoring the output current during the pre-magnetization phase.
- Avoiding sag when the brake is released through load precontrol.
Faulty constellations | Triggered fault |
|---|---|
2 or 3-phase motor phase failure | F82 = Output open |
Premagnetization time too short or incorrect motor/inverter combination. | F81 = Start condition error |
Motor phase failure due to active speed monitoring (factory setting) P500/P502 Speed monitoring 1/2, P501/P503 Delay time 1/2 | F08 = n-monitoring error |
INFORMATION
- A single-phase motor phase failure cannot always be detected reliably.
- Speed monitoring is always active.
- Correct performance of the hoist function requires the motor brake to be controlled via the inverter.
- The control must be designed in such a way that the direction of rotation of the drive can only be changed when it is at a standstill.
