Overall examination
According to overall examination flow chart finds out the general orientation that breakdown nods, refine gradually, in order to find out specific breakdown, following plan institute are shown.
2
Power source breakdown is checked
Power source light is not bright need to undertake checking to power supply system, following plan institute show examination flow chart.
3
Operational failure examination
Power supply is normal, moving indicator light is not bright, demonstrative system already was planted because of some unusual and it is normal to was stopped move, following plan institute show examination flow chart.
4
The input outputs breakdown examination
Inputting output is the channel that PLC and peripheral equipment have information communicates, whether do its work normally, besides outputting unit to concern with the input, still wait for component condition to concern with canal of terminal of connection layout, wiring, insurance. Following plan institute show examination flow chart.
5
The examination of external environment
The environmental factor that affects PLC work basically has temperature, humidity, noise and dust, and corrosive soda acid.
