PLC - how to fix the automation equipment

understand don't understand, PLC and automation equipment repair is not very big concern, equipment maintenance generally have mechanical and electrical aspects. That related to the PLC must be electric, and common electrical fault are electrical components, such as relay, contactor contact failure, the coil is not normal and disconnect, such as cable fault, broken insulation aging, motor fault, valve, close to switch, limit switch, etc. These are often encountered for equipment maintenance personnel, the solution is simple.

the combined with PLC fault needs to be ruled out one by one, the first observation of PLC power light, sometimes too much load could lead to a PLC can't boot, this time to measure whether the power supply voltage to reach requirements, testing with 24 v switching power supply output, to find whether there is fault. Running light is not bright, check to see if the button on the PLC to the RUN state, if a fault indicator, the inside of the test battery power, voltage. The hardest part was the result of application of PLC in fault, this is very difficult for our maintenance personnel, basic not solve, need to cooperate with manufacturers after-sales personnel coordination. Finally is the input and output fault, observe the PLC input and output indicators are consistent with our actual operation such as button switch, look at the corresponding input PLC is bright; PLC controller output indicator, see whether there is output. This reference check can find is the terminal malfunction of PLC, or peripheral electrical component failure.

PLC is the controller in automation, we don't need to understand it for maintenance personnel of the program, how to grasp some troubleshooting, of course, understand PLC is more simple and convenient for maintenance.

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