Finding the serial number for FANUC LADDER-III or related hardware typically involves checking software menus or physical labels. Software Serial Number
- Launch Fanuc Ladder III
- Click on "Help" > "About Fanuc Ladder III"
- The serial number will be displayed in the "About" dialog box
C. Windows Registry (if software cannot launch)
For advanced users: The installation serial number is sometimes stored in the Windows Registry, though it is encrypted. Navigate to:
HKEY_LOCAL_MACHINE\SOFTWARE\FANUC\LADDER-III\
Look for values like LicenseKey or Serial. Do not modify these unless instructed by Fanuc support.
Critical Note: The installation serial number activates the software on your PC. The hardware key serial number authorizes you to edit and transfer ladder programs. Both are often collectively referred to as "the serial number," causing significant confusion.
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2. The Hardware Key (ID) Serial Number
Fanuc Ladder III traditionally uses a USB hardware key (dongle) or, in newer versions, a software-based licensing ID. This key contains a unique serial number (often printed on the dongle itself or displayed within the software under Help > About). The software will not operate in "Edit" or "Online" mode unless this key is physically plugged in and its serial number matches the license database.
Q: Can I use the same serial number on multiple computers? A: It depends on your licensing agreement with Fanuc. Ensure that you have a valid license for each installation.
Floating License Model (rare for Ladder III)
- Serial number allows installation on multiple PCs, but only one can use the hardware key at a time by moving the USB dongle.
2. Contact Your FANUC Distributor
- Provide your company name, machine serial number (if applicable), and proof of purchase.
- FANUC authorized distributors can re-issue license details for legitimate users.