起重机各机构的运行要依靠程序控制装置来实现，现在起重机多使用可程序控制器来控制。

Crane operation of the various agencies to rely on the program control device to achieve, and now more than the use of a crane to control the programmable controller.

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可编程控制器(PLC)具有强大控制、模拟量处理和数学运算等功能，使其能够应用于起重机力矩超载保护中。

Programme logic controller (PLC) has the function of mighty control, analog signals transaction and mathematics compute, it insure that PLC can be used on the crane moment limiter.

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