The maintenance of PLC control system

The reliability of PLC controller is very high, but the influence of the environment and internal factors such as aging of components, can also cause the PLC can't work normally. If the PLC controller alarm or malfunction occurred until after the check, repair, it is passive. If can often regularly completes the maintenance, repair, system can always work in the best state. Therefore, preventive maintenance and daily maintenance is very important. General overhaul time every 6 months to 1 times a year, when the external environment condition is poor, can shorten repair time interval according to the concrete situation. PLC daily maintenance of the general content as shown in table.
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