1783-RMS10T
1783-RMS10T
1783-RMS10T
运行环境的检查:
(1)PLC运行环境温度在0~60℃。温度过高将使得PLC内部元件性能恶化和故障增加,尤其是CPU会因“电子迁移”现象的加速而降低PLC的寿命。温度偏低,模拟回路的安全系数也会变小,超低温时可能引起控制系统动作不正常。解决的办法是在控制柜安装合适的轴流风扇或者加装空调,并注意经常检查。
(2)环境相对湿度在5%~95%之间。在湿度较大的环境中,水分容易通过模块上的IC的金属表面的缺陷***内部,引起内部元件性能的恶化,使内部绝缘性能降低,会因高压或浪涌电压而引起短路;在极其干燥的环境下,MOS集成电路会因静电而引起击穿。
(3)要定期吹扫内部灰尘,以保证风道的畅通和元件的绝缘。建议PLC的电控柜使用密封式结构,并且电控柜的进风口和出风口加装过滤器,可阻挡绝大部分灰尘的进入。
检查PLC的安装状态。各PLC单元固定是否牢固,各种I/O模块端子是否松动,PLC通信电缆的子母连接器是否完全插入并旋紧,外部连接线有无损伤。检查PLC的程序存储器的电池是否需要更换。
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