What are the reasons for the failure of the hard disk of the industrial computer? There are two main reasons for the failure of the industrial computer in the normal environment, which are mainly divided into the quality problems of the disk itself and the problems caused by the working environment.
1. The quality of the disk itself;
This is not easy to distinguish. Only when you first do the control system, you can purchase brand products with good reputation, or you can use software such as Scandisk and Norton Disk Doctor to check the appearance of disk defects. If we can predict the quality and health of hard drives, this will give us time to select hard drives and back up important data. Our technical staff discovered a software called Drive Health on the Internet, which can check the service life of the hard disk and help friends to know the health status of the hard disk in advance.
The obstacles caused by the two working environments are more common in the following aspects:
1. The industrial computer has a long working time. Due to the necessity of normal manufacturing, the industrial control system of some manufacturers takes a long time to work, which brings great training to the industrial computer control system. According to Microsoft's operating system operating time report, Microsoft claims that its operating system after Windows 2000 can support long-term work, but from the perspective of actual operation, after the operating time spans over a week, the disk will be in the process of huge data exchange. A large number of data fragments are accumulated, which can easily become disk logical bad sectors, read and write failures, and slow system operation and startup. Therefore, the industrial computer can restart the industrial computer and defragment the disk on time under the conditions allowed by the manufacturing, so as to reduce the disk failure caused by the long-term work. The restart time can be determined according to the amount of data processed by the industrial computer and the manufacturing environment. It is not rigid and requires readers to try it out step by step. Judging from the author's actual experience, restarting and rectifying the industrial computer once a standard month (30 days) can reduce the chance of disk failure.
2. The temperature inside the industrial computer is too high. In an environment that requires a long period of high temperature operation, the components of the computer are prone to aging, and the frequency of hard disk failure is also higher. This requires the manufacturer's automation system guards to pay close attention to the chassis temperature during normal inspections, although the temperature of the industrial computer is kept between 10-30 degrees Celsius, too high and too low temperatures are not suitable for hard disks. Guard, if the case temperature reaches 30 degrees Celsius, the temperature of the hard drive inside will reach 40 degrees or higher. We can briefly DIR our industrial computer to achieve the effect of lowering the ambient temperature. 1. Replace the high-power CPU and hard disk fan (the hard disk fan should be kept unchanged, it should not be installed on the hard disk firmware frame to prevent the hard disk from being touched due to the fan rolling) to accelerate heat dissipation; Electric fans to increase air convection; 3. Install a small axial fan on the cabinet where the industrial computer is arranged; 4. Install air conditioners in the control room to lower 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 environmental humidity. If the humidity is too large, it will easily become a short circuit of the circuit board and destroy it; if the humidity is too small, it will easily generate static electricity, and it will also break down one-sided electronic components. Therefore, if the humidity is too large or too small, the city will bring potential threats to the industrial computer. On the subject of electrostatic protection, we must have good instrument grounding on our industrial computer. It is worth affirming that, the difference between the grounding of the industrial computer and the lightning protection grounding in civil construction, the grounding site should be three meters away from the control room, and the ∮20 galvanized angle steel should be used as the vertical and crisp ground at 1700 mm under the outdoor floor. The number of grounding resistance is less than 1 ohm (try the shaker when backfilling), and then use 40*40*4 galvanized flat steel and the grounding body to be reliably welded (each welding point should also be carefully rust-proof), and then assign it to the equipment Connect the 25mm copper cable to the system ground terminal and the address of the industrial computer. This can effectively reduce the risk of static electricity.
4. Great earthquakes are felt. Many manufacturers require the motor to produce drag, touch and other physical displacement movements, which not only bring huge noise, but also the touch brought by the mechanical operation will bring huge obstacles to the disk, optical drive, and floppy drive of the industrial computer. The technology of disk manufacturing is getting higher and higher, and the current speed has reached 7200 revolutions per second or even higher. In the large-scale data exchange in the automatic control system, the long-time, high-speed disk is easily triggered by the disk, causing the disk read and write ability to decline, the head positioning is slow, and even the disk is damaged; thus reducing the environment of the industrial computer. The shock is good for protecting the disk. We can try our best to keep the industrial computer away from the work site with a large earthquake source during engineering planning; if the work address cannot be changed, we can also place sponges and cushioning objects under the industrial control cabinet and box to reduce touch the risks posed.
5. There are many inhalable particles in the atmosphere. Most of the raw materials of many manufacturers need to be processed with powder materials. In addition, the external atmosphere is very active and there is a lot of sand and dust. A large amount of sticky dust is easily accumulated in the industrial computer, which causes the temperature inside the industrial computer to be too high, resulting in hardware damage. . This kind of environment occurs mostly around cooling fans such as CPU, power supply, hard disk, and graphics card. In places with light dust accumulation, in the environment allowed by normal production, it is possible to blow dust on time. In places where dust accumulation is relatively high, dust filter gauze can be installed in the ventilation area of the industrial control chassis and cleaned up on schedule.
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, the environment of insufficient power supply, unstable voltage and easy power outage occurs. Unstable voltage and sudden power failure cause the system to restart frequently, and the system files are easily lost and cannot be started normally; the magnetic head that is performing the read and write operations may occasionally become the head return prohibition due to the power failure, which will cause the disk failure of the industrial computer. . Therefore, the consolidation of the power supply in the working environment of the industrial computer is related to whether the work of the industrial computer is normal or not. We can use regulated power supply and UPS uninterrupted power supply for protection. The detailed equipment selection depends on the size of the load power and the duration of the work.
