MELSEC-Q High Performance to Universal QCPU Replacement Technical Bulletin

This technical bulletin provides detailed instructions for replacing Mitsubishi Electric High Performance model QCPU (Q02CPU, Q02HCPU, Q06HCPU, Q12HCPU, Q25HCPU) with Universal model QCPU (Q02UCPU, Q03UDCPU, Q03UDVCPU, Q03UDECPU, Q04UDHCPU, Q04UDVCPU, Q04UDEHCPU, Q06UDHCPU, Q06UDVCPU, Q06UDEHCPU, Q10UDHCPU, Q10UDEHCPU, Q13UDHCPU, Q13UDVCPU, Q13UDEHCPU, Q20UDHCPU, Q20UDEHCPU, Q26UDHCPU, Q26UDVCPU, Q26UDEHCPU, Q50UDEHCPU, Q100UDEHCPU). It covers precautions, replacement methods, applicable products and software, instruction compatibility, function differences (floating-point operations, error check processing, index-modified device range check, device latch, file usability, parameter-valid drive, boot file setting, external input/output forced on/off, simple dual-structured network alternatives), and special relay/register lists.