What are the reasons for the failure of the hard disk of the industrial computer? Under normal circumstances, there are two main reasons for the failure of the industrial computer, which are mainly divided into the quality problem of the disk itself and the failure problem caused by the working environment.
1. The quality of the disk itself;
This is not easy to distinguish. Only when you start to build a control system, you can buy a brand product with a good reputation, and you can also use Scandisk, Norton Disk Doctor and other software to detect disk surface defects. If we can predict the quality and health of hard drives, it will buy us time to choose hard drives and back up important data. Our technicians found a software called Drive Health on the Internet, which can detect the service life of the hard disk and help you know the health status of the hard disk in advance.
2. The failure problems caused by the working environment are common in the following aspects:
1. The industrial computer has a long working time. Due to the needs of normal production, the industrial control systems of some factories need to work for a long time, which brings a huge challenge to the industrial computer operating system. According to Microsoft's operating system running time report, Microsoft claims that its operating system after Windows 2000 can support long-term work, but from the actual operation, after running for more than a week, the disk will accumulate a large amount of data during the huge data exchange process. Data fragmentation can easily cause logical bad sectors on the disk, read and write errors, and slow system operation and startup. Therefore, when the production allows the industrial computer, it can restart the industrial computer and defragment the disk regularly to reduce disk errors caused by long-term work. The restart time can be determined according to the amount of data processed by the industrial computer and the production situation. It is not rigid and requires readers to explore slowly. From the author's actual experience, restarting and finishing the industrial computer once a standard month (30 days) can reduce the chance of disk errors.
2. The internal temperature of the industrial computer is too high. In environments that require long-term high-temperature operation, computer components are prone to aging, and the frequency of hard disk failures is also higher. This requires the factory automation system maintenance personnel to pay close attention to the chassis temperature during daily inspections, and try to keep the temperature of the industrial computer between 10 and 30 degrees Celsius. Too high and too low temperatures are not suitable for hard disk protection. If the case temperature reaches 30 degrees Celsius, the temperature of the internal hard drive will reach 40 degrees or higher. We can simply DIR our own industrial computer to reduce the ambient temperature. 1. Replace the high-power CPU and hard disk fan (the hard disk fan should be fixed, and should not be installed on the hard disk firmware frame to prevent the hard disk from vibrating due to the rotation of the fan) to speed up the heat dissipation; , to increase air convection; 3. Install a small axial flow fan on the cabinet where the industrial computer is placed; 4. Install an air conditioner in the control room to reduce the space temperature.
3. The ambient humidity is not suitable. The industrial computer is mainly composed of integrated circuits of many electronic components, and its insulation performance has a great relationship with the ambient humidity. If the humidity is too high, it is easy to cause the circuit board to be short-circuited and burned; if the humidity is too low, it is easy to generate static electricity, and it will also break down some electronic components. Therefore, if the humidity is too high or too low, it will bring potential threats to the industrial computer. In terms of electrostatic protection, we must have a good instrument grounding on our industrial computer. It is worth noting that the grounding electrode of the industrial computer is different from the lightning protection grounding on civil construction. The grounding electrode should be located three meters away from the control room. ∮20 galvanized angle steel is used as the vertical grounding electrode at 1700mm under the outdoor floor. The number of grounds should meet the grounding resistance of less than 1 ohm (the shaker test should be used when backfilling), and then use 40404 galvanized flat steel and the grounding body to be reliably welded (each welding point should be carefully treated for rust prevention), divided into Switch the 25mm copper cable to the system ground terminal and the IPC grounding point in the building. This can effectively reduce the harm caused by static electricity.
4. The ground felt a great earthquake. Many factories require the motor to produce physical displacement such as drag and vibration, which not only brings huge noise, but also brings huge damage to the disk, optical drive, and floppy drive of the industrial computer due to the vibration caused by the machine working. The technology of disk production is getting higher and higher, and the current speed has reached 7200 revolutions per second or even higher. In the large amount of data exchange in the automatic control system, the long-term, high-speed operation of the disk is easy to cause the disk to vibrate, resulting in the decline of the disk's read and write capability, the slow positioning of the magnetic head, and even the damage of the disk. Therefore, reducing the environmental shock of the industrial computer is beneficial to Protect the disk. During engineering design, we can keep the industrial computer as far away as possible from the work site where the vibration source is large; if the work location cannot be changed, we can also place sponges and buffer objects under the industrial control cabinet and box to reduce the vibration caused by hazard.
5. There are many inhalable particles in the air. Most of the raw materials in many factories need powder for processing. In addition, the outside air flow is large and there is a lot of sand and dust. A large amount of sticky dust is easy to accumulate in the industrial computer, causing the local temperature in the industrial computer to be too high and causing hardware damage. This happens mostly around cooling fans such as CPUs, power supplies, hard drives, and graphics cards. In places with light dust accumulation, regular dust blowing can be used when normal production allows. In places with serious dust accumulation, dust filter gauze can be placed in the ventilation place of the industrial control chassis and cleaned regularly.
6. The power supply voltage fluctuates greatly and is prone to power outages. With the rapid development of industry and life, the demand for electricity is also increasing day by day. In many areas, there are insufficient power supply, unstable voltage, and easy power outages. Unstable voltage and sudden power failure cause the system to restart frequently, and the system files are easily lost and cannot be started normally. Therefore, the stability of the power supply in the working environment of the industrial computer is related to whether the industrial computer works normally or not. We can use regulated power supply and UPS uninterruptible power supply for protection of industrial computer. The selection of specific equipment should be determined according to the size of the load power and the working time to be maintained.
