In the automatic control system of PLC and inverter, the following items should be paid attention to

1、PLC供电电源与动力系统电源(变频器电源)分别配备，且PLC的供电应该选择阻隔变压器;

1. PLC power supply and power system power supply (inverter power supply) are equipped respectively, and the power supply of PLC should select the blocking transformer;

2、动力线尽量与信号线分隔，信号线要做屏蔽;

2. The power line shall be separated from the signal line as far as possible, and the signal line shall be shielded;

3、无论是模拟信号输入仍是模拟信号输出，模拟量通道一概运用信号阻隔模块;

3. Whether it is analog signal input or analog signal output, analog channel uses signal blocking module;

4、PLC程序里做软件滤波规划;

4. PLC program to do software filtering planning;

5、信号地与动力地分隔规划。plc控制柜厂家用来逻辑操控,首要用于组织的动作流程操控；

5. Signal ground and power ground are planned separately. PLC control cabinet manufacturers are used for logic control, mainly for the organization of the action process control;

现在在自动化操控系统中，低压配电柜供货商变频器的运用也越来越广，作为电力设备专业集成商，祥科的工程师经常将变频器与PLC集成在同一或相邻的柜内，电机发起操控箱这样会导致变频器对PLC模拟量烦扰而形成收集数据的不稳定或呈现其他缺点。

Now in the automatic control system, the frequency converter of low-voltage distribution cabinet supplier is more and more widely used. As a professional integrator of power equipment, engineers of Xiangke often integrate the frequency converter and PLC in the same or adjacent cabinet, and the motor initiates the control box, which will cause the frequency converter to disturb the PLC analog quantity and form the instability of data collection or other shortcomings.