Figure 2.3) 3 Line diagram illustrates in Figure 1. The speed of the host is determined by the circuit on the platform via the terminal VC2, the start is determined by the signal on the starter relay KA2, unlike other variable frequencies, the start, stop and speed are determined by the communication with the host RS485, without the need to give a signal separately. The feedback signal of the swing rod is simultaneously input to VC2, the frequency
图(二) 3线路图说明 在图一中为主机与收卷变频的接线图，主机的速度由 作面台上的电位器通过端子VC2给定，启动由启动继电器KA2给定信号，与别的变频器不同的是，从机的启动，停机及速度给定通过与主机RS485通讯给定，无需单独给出信号。摆杆的反馈信号输入到VC2，主机的频率给定与反馈信号的偏差作为从机的输出频率。 在穿线材过程中，主机的点动控制由脚踏开关来控制，但这时主机点动从机不能动，所以点动信号只送到主机，同时在参数设置时要设置主机点动不同步。 图二为控制回路图，按下SB3启动主机，SB2为停止控钮