MELSEC-Q CPU Serial Number Indication Change Technical Bulletin

This technical bulletin announces that serial numbers for MELSEC-Q series CPU modules will now be printed on both the front face of the module and the package label, in addition to the existing side face (rating plate), to improve identification without dismounting. The change applies to Basic model QCPUs, High Performance model QCPUs, Process CPUs, and Universal model QCPUs, with implementation starting from mid-September 2007.