2021-09-03 13:20:05
When you open a project in STEP 7 V5.7, why do you get the error message 3280:709 "Project or library are on a write-protected medium or are protected by a rights assignment"?
FAQ ∙ UpdatedChange to the more recent procedure "Always assign CPU-oriented unique message numbers" in your project or install the option package S7-PM if you still have to use the "project-wide message number procedure" in your project.
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