Method for repairing on-site PLC damage
First of all, to confirm: In the configuration of some blocks of the original PLC, in the "Copy protection" area, whether or not: the serial number of the bound CPU is set. If it is bound, the original SMC card cannot be directly used in the new CPU. At this point, the source program needs to be removed. The S-1500 uses the SIMATIC memory card SMC. Regardless of the download method, the program must be downloaded to the SMC and then transferred to the PLC. The SMC card is used for storage: code blocks (OB, FB, FC), data blocks, technology objects, hardware configuration configuration. It also contains the symbols of the variables, comments, and the data type of the PLC, which are not in the working memory of the PLC ontology. The SMC card is inserted and the CPU compares the configuration content on the SIMATIC memory card with the retentive backup data. With the new CPU, there must be a data difference and the CPU will automatically perform a memory reset and enter STOP mode. Therefore, as long as there is no such protection, the contents of the load memory, that is, the SMC card, are loaded into the working memory of the CPU. As long as the order number and version number of the CPU are the same. The PLC will work normally. Deployable Drums,Deployable Drum With Wheels,Portable Pre-Terminated Cable Drum,Pre-Terminated Cable Drum ShenZhen JunJin Technology Co.,Ltd , https://www.jjtcl.com