A discussion is made of the reliability of PLC automatic control system. Some effective and practical measures are proposed to increase its reliability.
对PLC自动控制系统可靠性问题进行了探讨，并结合生产实际，提出了提高控制系统可靠性的几点行之有效的实用措施。
PLC control system will be completed forming manual control, automatic control precision forming and reset functions.
PLC控制系统将完成手动控制成形，自动控制精确成形，复位等功能。
Application of OMRON CPM1A series PLC in solar water heater automatic control system is mainly introduced, emphasises on the system hardware constitution and the system software design process.
主要介绍了OMRON公司的CPM1A系列在太阳能热水器自动控制系统中的应用，重点阐述了系统的硬件构成及系统软件的设计过程。
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