PLC在应用中应注意的问题——外文翻译、中英文翻译.doc

外文资料译文
PLC question
PLC which should pay attention in the application is specially the control device which serves for the industrial production, usually does not need to take any measure, may use directly in the industry environment. But, when the production environment is too bad, the ic interference is special intense, or installs uses improper, cannot guarantee PLC the normal operation, therefore should pay attention to the following question in the use.
First, Siemens PLC maintenance
1, maintenance procedures, equipment, periodic testing, adjustment provisions
(1) half-yearly or quarterly inspection PLC terminal connections, and if time to re-loose strong local connection;
(2) of the to the host power supply voltage of the monthly re-survey work;
Second, the provisions of cleaning equipment on a regular basis
(1) every six months or a quarter of the PLC to clean, cut off power to the PLC power supply to the power rack, CPU board and input / output board in turn be removed to purge, clean and then in turn installed in situ, will all link to resume evacuation call and start the host PLC. PLC box carefully sweeping health;
(2) every three months to replace the power rack below the filter; three maintenance preparation, maintenance of order (1) ready before maintenance tools; (2) To protect ponents and the template does not function no fault damage, must be p