AD71, AD75, AD57 Special Function Modules Y2K Technical Bulletin

This technical bulletin addresses the Year 2000 problem for the software packages of AD71, AD75, and AD57 special function modules used with Mitsubishi MELSEC-A Series PLCs. It notes that after the year 2000, resetting the system or powering on will cause the date to revert to 1980, requiring manual reset, though clock-dependent functions are not supported and thus no further measures are needed.