Universal Model QCPU Device Data Retention Technical Bulletin

This technical bulletin explains three methods for retaining device data in Mitsubishi Universal model QCPUs when power is off or the CPU is reset: using large-capacity file registers (R, ZR), writing/reading data to standard ROM via SP.DEVST/S(P).DEVLD instructions, and specifying internal user devices as latch ranges. It also provides guidance on minimizing scan time by reducing latch points for internal devices and allocating data to file registers instead.