The actual load is compared to four limit values, and by achieving the limit value, the relay of the crane controller could be switch.
实际的装载量靠近极限值的同时，又不断与四个极限值相比较。起重机控制电容可以作为开关。
2
An essential function of the controller is to provide alarm relay contacts.
控制器的一个重要功能是提供报警继电器触点。
3
It changes the disadvantage that drum or CAM controller in relay control total steps, output points are limited, large volume and weight, high costing.