直進(jìn)拉絲機(jī)廠家根據(jù)操作工在面板設(shè)定決定作業(yè)的速度，該速度的模擬信號(hào)進(jìn)入PLC，PLC考慮加減速度的時(shí)間之后按照一定的斜率輸出該模擬信號(hào)。這樣做的目的主要是滿足點(diǎn)動(dòng)、穿絲等一些作業(yè)的需要。PLC輸出的模擬電壓信號(hào)同時(shí)接到所有變頻器的AI2（AI1也可以）輸入端，作為速度的主給定信號(hào)。各擺臂位移傳感器的信號(hào)接入到對(duì)應(yīng)的轉(zhuǎn)鼓驅(qū)動(dòng)變頻器作為PID控制的反饋信號(hào)。根據(jù)擺臂在中間的位置，自己設(shè)定一個(gè)PID的給定值。這個(gè)系統(tǒng)是非常典型的帶前饋的PID控制系統(tǒng)，一級(jí)串一級(jí)，PID作為微調(diào)量。

The direct-inlet?wire drawing machine manufacturer determines the speed of the operation according to the operator setting on the panel. The analog signal of the speed enters the PLC. After considering the acceleration and decreasing time, the PLC outputs the analog signal at a certain slope. The purpose of this is mainly to meet the needs of some operations such as jogging and threading. The analog voltage signal output by the PLC is connected to the AI2 (AI1 can also be) input of all inverters as the main given signal of the speed. The signals of each swing arm displacement sensor are connected to the corresponding drum drive inverter as a feedback signal for PID control. Set a PID value by yourself according to the position of the swing arm in the middle. This system is a very typical PID control system with feed?forward, with one level in series and one level in fine-tuning amount.