Plc tripping issue

[salman jehangir]

I,m working at medium level poultry industry having 3 mega watt plant running by plc automation. By some time we faced plc tripping frequently here , checked plc modules, ground , supplies and all other necessary thing with help of industrial grade volt meters but it did'nt help to diagnose issue. Can anyone share easy plc troubleshooting methods in form of guide or video tutorials.!