: It distinguishes between different tiers of the software (e.g., LADDER-III vs. older LADDER-II versions). 4. Troubleshooting and Recovery If a serial number is lost or a license becomes inactive:
: During the setup process , the software prompts for the User Name , Company Name , and Serial Number . If the software is already installed, this information can sometimes be found under the "Help" or "About" menu. fanuc ladder iii serial number