With the extensive use of PLC in the automatic control systems in petrochemical industry, correct selection of PLC in the actual work is of great important.
随着可编程控制器在石油化工自动化控制中的应用越来越广泛，PLC的正确选型在实际工作中显得非常重要。
With a project example, presents air conditioning system forms, terminal device design, dividing of air system and water system, design of automatic control system, and equipment selection.
结合工程实例，介绍了出租商场空调系统形式，末端设计方式，风系统、水系统划分，自动控制系统设计，设备选型等。
Automation: Microprocessor controlled optical bench, digital speed control, automatic gain selection, advanced system check, automatic power saving mode.
自动化：微处理器控制光学台，数字化动镜控制，自动增益选择，高级的系统诊断，自动节电模式。
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