Must read! Common faults and detection methods of automation equipment


The popularization rate of automation equipment in enterprises is getting higher and higher. At the same time, the failure rate of automation equipment is also rising. Any automation equipment is composed of executive components, sensors and controllers. When the automation equipment suddenly fails to work, or due to the order of work, the equipment is out of order, we must carry out troubleshooting and fault diagnosis.


In order not to affect the normal work of automation equipment, daily diagnosis mainly includes the following five aspects:


Check all power, hydraulic and hydraulic sources of automation equipment

The problems of power supply, source and hydraulic source often lead to the failure of automation equipment.

For example: power supply problems, including the power supply failure of the whole workshop. Or the power supply is low, the fuse is burned, and the power plug is in poor contact. The power supply of each equipment and the power supply of the workshop shall be included in the inspection of automation equipment. Air source, including air pressure source required by pneumatic device. Hydraulic source, including the working condition of hydraulic pump required by automation equipment hydraulic device.


Check the sensor position of automation equipment for deviation

Due to the negligence of the equipment maintenance personnel, the position of some sensors may be wrong. Such as not in place, sensor failure, etc. Technicians should often check the sensor position and sensitivity, if it is found that the sensor is broken, it should be replaced in time.

Sometimes, due to the vibration of automation equipment, most of the sensors will be loose after a long time of use, so in the daily maintenance, we should often check whether the position of the sensor is correct, whether it is fixed and firm.


Check the relay, flow control valve and pressure control valve of automation equipment

Relay and magnetic induction sensor, long-term use will also appear iron adhesion, which can not guarantee the normal electrical circuit, need to be replaced. In the pneumatic or hydraulic system, the opening of throttle valve and the pressure regulating spring of pressure valve will also loosen and slide with the vibration of the equipment. In fact, these equipment and sensors are the same, in the automation equipment need routine maintenance parts.


Check the electrical, pneumatic and hydraulic circuit connections

If no problem is found in the above three steps, check all circuits. Check whether there is a short circuit in the circuit wire, and check whether the wire in the trunking is cut by the trunking due to pulling. Check the trachea for damaging creases. Check the hydraulic oil pipe for blockage. If there is a serious crease in the trachea, the technician needs to replace it immediately. The hydraulic oil pipe should be replaced at the same time.


If there is no problem in the above steps, the fault may appear in the controller of automation equipment, but it can never be a program problem. When the equipment fails, the technicians should not immediately confirm that the controller is damaged, because there is no serious short circuit. The controller has short circuit protection inside, and the controller will not be burned in general short circuit.

The article is taken from the official account of the state run Tong.

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