When the equipment appears, the production line cannot be turned on. The check is caused by the automatic shutdown of the CPU. When the machine stops, the SF system fault light is on, the CPU STOP and the BF light are off, indicating that the slave is not causing the shutdown, power failure or switching the CPU switch from RUN to STOP. Go to RUN, the CPU works again, online online diagnosis, a lot of alarm content, the most important alarm content is: Cell Phone Case, Mobile Phone Covers, Clear Phone Case, Mobile Phone Case, TPU Phone Case, Silicone Phone Case Shenzhen Jianjiantong Technology Co., Ltd. , https://www.jjthydrogelprotector.com
Event 29 / 100: Event ID 16# 494D STOP mode caused by I/O error No user related information (Z1): 0000 No user related information (Z2): 5752 (Z3): 2101 Previous operating mode: RUN Required Operating mode: STOP (internal), external error, incoming event 01:33:39.963 2012-04-10
Look at the program download OB80, 82, 85.86.87, 100, 121, 122 and other organizational blocks, not the software programming and DP slave problems caused by the failure, the DP slave input address problem is reported, not the cause of CPU down, because of the emergence In this case, the corresponding OB block is called in the program. The CPU will only alarm and will not stop. This time the stop is an external error, the event is entered, what is the event of this external event, the diagnosis area does not give an answer, and it appears again in the afternoon. The CPU automatically stops,
Firstly, the DP connector, connector and module of the substation are removed. The cpu only reports an error without stopping the machine, thus eliminating the above problem. The system also uses the IM365 interface module, which will cause problems for his own reasons. Consult with Siemens and Equipment manufacturers, Siemens technicians replied that the stability of this module is not very good, manufacturers also suspect this module. Agree to send me a new module to try. But the new one is not so fast. And I also discussed this module in the Siemens forum, the altar friends still recognize this module, I think the possibility of this module is not very big.
At this point, I suspect that in order to save money, the system does not regulate the problem. The following improvements have been made to this end:
1. The DC24V power supply circuit has been improved. The original power supply for the CPU and other modules is 0.5 square. Everyone shares a line and uses DC24V power supply in series. The voltage drop after the switching power supply to the plc and the module is quite powerful. The voltage is 25.8 to 23.3 at the CPU. After the improvement, increase the power cable to 1 square, and pull the twisted pair power cable separately for the cpu and other modules. After the improvement, the voltage at the switching power supply is 24, 12, and the cpu is 24.01. For the time being, the power supply used by the system is Mingwei's switching power supply. It feels not very good. It is ready to purchase Ou Chen's switching power supply to replace it.
2. Pull the ground wire on the cpu and expansion module separately and connect it to the grounding of the steel frame of the house.
3. All module connectors are tightened and the unregulated wiring is reconnected.
After the three measures are completed, the CPU will be powered on until the next morning at 8:00 in the morning to check that the CPU has not stopped, so that the production line is turned on. After 3 days, the CPU does not automatically stop, until May 21st. There was no problem of automatic CPU shutdown. The IM365 module was not used by the manufacturer.
Through the solution of this problem, I deeply realized that the diagnostic buffer is not omnipotent, and there are many contents in the buffer. It is necessary to distinguish the primary and secondary, otherwise it is easy to mislead. The system downloads the corresponding organization block, remote substation I/O. The fault is that the CPU will not be shut down. The hidden power caused by the switching power supply and wiring and EMC is not serious enough.