Mitsubishi Electric MELSEC iQ-R16MTCPU Programming Manual page 367

License authentication error
■Error when loading license key file
The license key file is loaded when the Multiple CPU system power supply is turned ON, or the add-on library is loading.
A moderate error (error code: 3081H) occurs in the following cases.
• When the license key file is abnormal.
■Error when checking the add-on license
• When using an add-on library without a license authentication, a warning (error code: 0EF1H) occurs when the Multiple
CPU system power supply is turned ON.
• The license period decreases with the operating time (the time when Multiple CPU system power supply is turned ON).
When the time remaining on the license period is 0, a warning (error code: 0EF1H) occurs. The next time the Multiple CPU
system power supply is turned ON, license period expired is detected, and a moderate error (error code: 3081H), or minor
error (error code: 1FF1H) occurs.
8 MOTION CPU MEMORY STRUCTURE
8.5 Add-on Function
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