Check relay, flow control valve, pressure control valve

Like relays and magnetic induction sensors, long-term use can lead to ground adhesion, disrupting the electrical circuit and necessitating replacement. In pneumatic or hydraulic systems, the throttle opening and pressure regulating springs of pressure valves can become loose or slip due to vibration. Like sensors, these devices require routine maintenance. Therefore, they must be carefully inspected during daily operation.

Check electrical, pneumatic and hydraulic circuit connections

If no problems are found in the above three steps, check all circuits. Check for any broken wires in the circuit, especially if the wires in the wire ducts have been cut by pulling. Check the air pipes for any damaging creases. Check the hydraulic oil pipes for any blockages.

During this circuit check, use a multimeter, set to the beeper setting, to check the circuit's path. If the air hose is severely creased, replace it immediately. The hydraulic hose should also be replaced.

After ensuring that the above steps are correct, the fault may occur in the controller, but it will never be a program problem! First of all, don’t be sure that the controller is damaged. As long as there is no serious short circuit, the controller has short-circuit protection inside, and a general short circuit will not burn the controller.

First, check for any high-frequency interference devices near the controller. If so, remove them immediately. If you're outdoors, strong lightning can cause the controller to malfunction for a moment. In this case, remove all possible interfering devices and then restart the controller.

Secondly, if restarting does not work, check whether the controller wiring is loose or has poor contact.

Finally, if the wiring is correct, determine whether the problem lies with the PLC's memory card. Replace the card with a new one, download the program, and check whether the previous memory card is faulty.

Power stations, substations, and DC power supply panels are very important equipment. With the continuous development of science and technology and the increasing perfection of single-chip microcomputer technology, the power industry has put forward higher precision and higher quality requirements for power station and substation equipment. DC power supply panels are very important equipment in the secondary equipment of power stations and substations. DC power supply panels are responsible for providing DC control and protection power to power stations and substations, and at the same time provide operating power to high-voltage switches and circuit breakers. Therefore, the reliability of the DC power supply panel will be directly related to the safe operation of the power station. The development of DC power supply panels has gone through a long time, from early DC generators and magnetic saturation DC chargers to integrated circuit thyristor controlled DC chargers, single-chip microcomputer controlled thyristor chargers, high-frequency switching power supply chargers, etc., the DC power supply panel is already very mature.

The rectification and charging part of the DC power supply panel still adopts the most popular soft switching technology in the world, which transforms the industrial frequency AC through multiple stages and finally forms a stable DC output. The core component of the DC power supply panel system control is the V80 series programmable controller PLC, which processes the input and output analog quantities and switching quantities collected by the system, and finally controls the high-frequency switching power supply module to make it work reliably according to the battery curve and the manually set working requirements.