SCC-F，DCS系统变频器干扰变频器起动及运行

变频器干扰变频器起动及运行过程中产生的谐波引起电网电压畸变影响PLC 工作电源质量;同时变频器的输出会产生较强的电磁辐射干扰，对PLC 的I/O 点有影响。随着变频器在卷烟设备中的应用越来越多，其对PLC 的干扰问题也越来越tu出，PLC是工业领域基础自动化的主要工具，其通信系统应具有不同的能力和性能，以满足点对点通信、组成PLC网络，完成上下ii控制系统之间的数据交换等不同的要求。对网络的主要要求有
①传输介质和连接组件标准化。在yi个网络控制的环境中，需要相互通信的自动化部件往往分布广泛，加入的点很多。这就要求传输介质和组件接口使用量要少，且要求相互兼容。
足够的传输距离才能保证站与站间的任意通信,②足够的传输距离。自动化控制的工厂和车间比较分散，网络具有③系统扩展性良好。在自动化系统结构改变时，要求网络系统响的变更应该简单易行且对自动化系统的影响尽可能小，④数据传输率较gao。较gao的传输率可保证参加通信的每个站与他站之间的通信能够畅通，并获得更短的反应时间。⑤传输gao度可靠。传输过程中出错的数据应能及时jian测并纠正

SCC-F, DCS system
The frequency converter interferes with the harmonic generated during the start-up and operation of the frequency converter, causing voltage distortion in the power grid and affecting the quality of the PLC working power supply; At the same time, the output of the frequency converter will generate strong electromagnetic radiation interference, which will have an impact on the I/O points of the PLC. With the increasing application of frequency converters in cigarette equipment, their interference with PLC is also becoming more and more prominent. PLC is the main tool for basic automation in the industrial field, and its communication system should have different capabilities and performance to meet different requirements such as point-to-point communication, forming PLC networks, and completing data exchange between upper and lower control systems. The main requirements for the network are
① Standardization of transmission media and connection components. In a network controlled environment, automation components that require communication with each other are often widely distributed and have many added points. This requires less usage of transmission media and component interfaces, and mutual compatibility.
Sufficient transmission distance is necessary to ensure any communication between stations, ② sufficient transmission distance. The factories and workshops controlled by automation are relatively scattered, and the network has good system scalability. When the structure of the automation system is changed, it is required that the changes in the network system should be simple and easy to implement, and the impact on the automation system should be as small as possible. ④ The data transmission rate is relatively high. A higher transmission rate can ensure smooth communication between each participating station and other stations, and obtain shorter response time The transmission is highly reliable. Errors in data during transmission should be promptly measured and corrected