MELSEC-Q/QS LINK PARA. ERROR 3101 Technical Bulletin

This technical bulletin describes the cause and solutions for the LINK PARA. ERROR (error code 3101) that occurs on MELSEC-Q and QS series CPUs when no MELSECNET/H refresh parameter is set and the B (Link relay) or W (Link register) device point values are reduced below specific thresholds. It provides relevant model lists, explains the consistency check between device points and refresh data, and offers corrective actions such as setting MELSECNET/H parameters or adjusting LB/LW values to match the B and W settings.