PLC maintenance and repair - Solutions - Huaqiang Electronic Network

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Although the failure rate of plc is very low, the control system composed of PLC can work stably and reliably for a long time, and it is essential to maintain and inspect it alone. Generally, the PLC system should be periodically checked every six months. The repairs include:

(1) Power supply. Check if the power supply voltage of the PLC is within the standard range. The AC power supply operating voltage ranges from 85 to 264V, and the DC power supply voltage should be 24V.

(2) Environmental conditions. Check whether the temperature in the control cabinet is in the range of 0 to 55 °C, the relative humidity is in the range of 35%-85%, and there is no dust such as dust or iron filings.

(3) Installation conditions. Is the connector of the connecting cable fully inserted and tightened, the screws loose, and the units are reliably fixed and loose.

(4) I/O terminal voltage. Both should be within the voltage range required for the job.