在工业建筑中，暖通空调系统的控制应用一直是一个可靠性和服务性问题。在崎岖的工作环境中，商用级控制并不总是能很好地发挥作用，也没有将维护置于生产过程的优先地位。另一方面，工业级控制器具有高度的准确性和可靠性，但在经济上很难证明其合理性。可编程逻辑控制器在工业过程中的新兴优势提供了一个极好的机会，可以将这项优良的技术扩展到暖通空调系统控制中- 广泛的设施监控和管理，利用与流程共享的公共通信网络。同时，通用系统元件和操作的全部好处提高了整个系统的可靠性和维护。本文介绍了一个可编程逻辑控制器在密歇根州巴特克里克的汽车零部件制造和装配大楼中用于HVAC控制的示例。该工厂分两期建成，占地略超过100万平方英尺，为汽车行业生产散热器、冷凝器盘管和加热器组件。 本文介绍了可编程逻辑控制器与传统气动或直接数字控制系统相比的系统应用和相对优点。描述了信号和控制接口的方法，以及编程逻辑、通信协议和设施监控能力。与arty其他主控制系统一样，强调了系统检查和调试以及操作员培训的重要性。引文:研讨会，ASHRAE交易，第95卷，pt。 1989年，芝加哥

The application of controls for HVAC systems in industrial buildings has always posed a problem of reliability and service. Commercial-grade controls have not always stood up well in a rugged working environment nor is maintenance prioritized over that for the production process. industrial-grade controllers, on the other hand, offer a high degree of accuracy and reliability but have proven difficult to justify economically. The emerging predominance of programmable logic controllers in industrial processes offers an excellent opportunity to extend this fine technology into HVAC system control This same system cart provide plant-wide facilities monitoring and management, utilizing a common communications network shared with that of the process. At the same time, the full benefits of common system elements and operations enhance overall system reliability and maintenance.This paper addresses an example of the use of programmable logic controllers for HVAC control in an automotive parts manufacturing and assembly building in Battle Creek, MI. The plant, built in two phases, occupies just over I million ft 2 and produces radiator, condenser coil, and heater assemblies for the automotive industry.This paper describes the system application together with relative merits of programmable logic controllers vs. more conventional pneumatic or direct digit control systems. Methods of signal and control interface are described together with programming logic, communications protocol, and facilities monitoring capability. As with arty other primary control system, the importance of system checkout and commissioning is emphasized together with operator training.