- Slack rope detection by a safety switch that cuts off total movement of the Stacker
- Lifting carriage over-speed governor that mechanically actuates the safety catches and cuts off total movement of the Stacker
- Electrical switches that detect end of aisle traveling zones, resulting and ensuring safe operation at low traveling speeds at the end of the aisle and cut off traveling movements at the extreme position
- Interlocking of traveling and forking movements
- Load detection on the Stacker Crane
- Photocells on Stacker Crane to detect status of bin location (free/occupied) on the Storage System
- Auto PLC diagnosis in case of incorrect operation/malfunction -Communicated to remote computer control
- Error signal flashes "Time-Out" if activity not completed in given time
- Travelling movements not allowed if :
- pallet not centered on forks in Manual mode
- pallet overhangs the lifting platform
