福建宇创自动化设备有限公司

PLC的维护与检查如何做？
虽然PLC的故障率很低，由PLC构成的控制系统可以长期稳定和可靠的工作，但对它进行维护和检查是必不可少的。一般每半年应对PLC系统进行一次周期性检查。检修内容包括：
（1）供电电源。查看PLC的供电电压是否在标准范围内。交流电源工作电压的范围为85～264V，直流电源电压应为24V。
（2）环境条件。查看控制柜内的温度是否在0～55℃范围内，相对湿度在35%-85%范围内，以及无粉尘、铁屑等积尘。
（3）安装条件。连接电缆的连接器是否完全插入旋紧，螺钉是否松动，各单元是否可靠固定、有无松动。

（4）I/O端电压。均应在工作要求的电压范围内。

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