1. The industrial computer "crashes" due to hardware reasons
Reason analysis: When the industrial computer processes too many on-site signals transmitted by the PLC, the CPU frequency of the industrial computer is low and the memory is small, so it is impossible to identify and process so many signals together, which makes these signals "crash" and form the "crash" of the industrial computer.
Solution: Due to the limitation of the memory module slot of the IPC motherboard, the memory can only be expanded to 64M. The primary way to deal with this is to reduce the frequency of the industrial computer to process and identify the on-site signal to prevent the signal from "crashing". The specific plan is as follows: when the industrial computer is connected to the field signal through the PLC, the signal sampling period is set to be more than 2s, and the analog signal with little change such as temperature can be set to more than 10s. In the process of WinCC programming, after setting the sampling period of all analog signals for more than 2s, the phenomenon of "crash" of the industrial computer is rarely generated.
Second, because of the ambient temperature to form the industrial computer "crash"
Reason analysis: the industrial computer is sensitive to the ambient temperature, and when the summer is hot and the air conditioner is damaged, the industrial computer is easy to "crash".
Solution: Repair the air conditioner, reduce the ambient temperature of the industrial computer, and ensure the normal operation of the industrial computer.
3. The industrial computer "crashes" due to poor internal heat dissipation
Reason analysis: The environment where the industrial computer is located is harsh, in addition to the high temperature, the dust is also large. When dust enters the industrial computer, various electronic components such as boards and CPUs have poor heat dissipation, resulting in the "crash" of the industrial computer.
Solution: Regularly remove the dust inside the industrial computer and insist on good ventilation.
4. Check the CPU fan and the host power fan
Reason analysis: The heat dissipation of the industrial computer is mainly carried out through the CPU fan and the power fan. When the CPU fan is damaged, the temperature of the CPU rises, and it is easy to form a "crash" of the industrial computer.
Solution: Always check the fan of the industrial computer and replace the damaged fan in time. When the industrial computer in the central control room left the factory, the CPU was only equipped with a heat sink, and there was no fan. After installing a special cooling fan, the temperature of the CPU dropped by nearly 5°C.
Fifth, often clean up the documents that are produced temporarily
Cause analysis: When the industrial computer is running, it will produce a lot of temporary files such as Temp files, which occupy hard disks and system resources, affecting the speed of information processing by the industrial computer. Check the hard disk regularly and delete temporary files, improving the speed of information processing on the industrial computer.
Sixth, the system is often protected
Reason analysis: due to the modification of the control program and other reasons, other application software is installed in the system, too much application software will make the operation speed of the industrial computer slower and slower. Therefore, every once in a while, do a comprehensive protection of the industrial computer, click on the "beginning→ program→ attachment → system thing → protection guide", and then click the "confirm" button to carry out comprehensive protection of the industrial computer, so that the industrial computer can adhere to the best condition. It is best to do a "hard disk debris cleaning" every 1 month for hard disks, which can speed up the program after cleaning.
Seventh, the information blocking forms the "crash" of the industrial computer
Cause analysis: the industrial computer (upper computer) in the central control room supervises and controls the S7-400PLC (lower computer), and the problem phenomenon when the information is blocked is: the monitoring signal on the industrial computer screen presents a "dark shadow" and the signal value is zero, and the upper computer cannot supervise and control the lower computer. This kind of problem is not the same as the "crash" phenomenon mentioned above. The reason for the problem is caused by information blocking, because the lower computer "crashes" or the transmission signal network cable and network card have problems, resulting in the upper computer can not receive the signal, in fact, the upper computer does not "crash". This problem occurred in early November 2001, because the network cable and the network card were not in good contact, resulting in the upper computer being unable to supervise and control the lower computer.
Solution: When the screen of the upper computer presents a "dark shadow", first check the working status of the lower computer, there are various error indicators on the CPU template of S7-400PLC, and you can operate according to the status of the indicators. If the PLC "freezes", rebooting the PLC's CPU with the key will restore it to normal. If there is a problem with the network cable and network card, the operator should immediately check whether the signal cable plug of the upper and lower computer has poor contact, and gently press or swing each plug by hand, it is very likely to find out the problem.
8. It is recommended that the industrial computer be upgraded
At present, after the above measures, the number of "crashes" of industrial computers has been greatly reduced. However, because the hardware configuration of the upper computer is low, the software operation and control system version is also low, and the processing speed of the upper computer is still slow, it is recommended to upgrade to the industrial computer and add CPU frequency, memory capacity and hard disk capacity. In this way, the speed of processing information of the industrial computer can be greatly improved, and the phenomenon of "crash" of the industrial computer can be prevented.
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