Does Writing a New Program to a PLC Overwrite the Original Program?
This is a common question among PLC beginners, when a new program is successfully written (downloaded) to the PLC, the existing old program in the PLC is completely deleted and replaced. 1. When using programming software (such as Siemens STEP 7) to perform the “download” operation, the internal process is as follows: 1. Compilation: Your … Read more