Control cables buried in cable trays, cable trenches, or conduits, which are not easily visible during normal times. Regular maintenance can help detect potential hazards in advance and avoid equipment shutdown caused by signal interruption.

When conducting daily inspections, first check the cable sheath. Check for cracks, wear, bulges, and signs of being squeezed by heavy objects on the outer skin. If the outer skin is damaged, water vapor and dust can easily enter, causing short circuits between the core wires and intermittent signals.

The location of cable joints is a high-risk area for faults. The joint should be kept dry and free from accumulated water and dust. In humid environments, connectors are prone to moisture, causing signal interference. If the joint protective sleeve is found to be aging, it should be dealt with in a timely manner. Also pay attention to whether the cable has been scratched by sharp objects. If the edge of the cable tray is sharp, it is easy to cut the outer skin of the cable.

If the device experiences unstable signals and intermittent changes, do not blindly replace the cables. You can first check the wiring terminals at both ends of the cable to see if they are loose or oxidized. Loose terminals are a common problem, and many signal faults can be solved by tightening them.

When maintaining, do not drag the cable casually, and do not stack heavy objects above the cable. If the ambient temperature is too high, ventilation should be ensured as prolonged high temperatures can accelerate the aging of the outer skin. Regularly keeping inspection records and promptly addressing minor issues can effectively reduce the probability of control cable failures and minimize the impact of production interruptions.