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工控专家厦门莫格电气自动化，电话咨询0592-6808384 邮箱3555751719@qq.com
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1. 设计基本原则
为了实现被控对象的工艺要求，以提高生产效率和产品质量。
1. PLC的选择除了应满足技术指标的要求外，还应重点考虑该公司产品技术支持与售后服务情况。（尽量选择主流产品）
2. 最大限度地满足被控对象的控制要求。
3. 在满足控制要求的前提下，力求使控制系统简单、经济，使用及维修方便。
4. 保证控制系统得安全、可靠。
5. 考虑到生产的发展和工艺的改进，在选择PLC容量时，应适当留有余量。
2. 设计的主要内容
1. 拟定控制系统设计的技术条件。技术条件一般以设计任务书的形式来确定，它是整个设计的依据；
2. 选择电气传动形式和电动机、电磁阀等执行机构；
3. 选定 PLC 的型号；
4. 编制 PLC 的输入 / 输出分配表或绘制输入 / 输出端子接线图；
5. 根据系统设计的要求编写软件规格说明书，然后再用相应的编程语言（常用梯形图）进行程序设计；
6. 了解并遵循用户认知心理学，重视人机界面的设计，增强人与机器之间的友善关系；
7. 设计操作台、电气柜及非标准电器元部件；
8. 编写设计说明书和使用说明书；
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