Error 3012 occurs when the multiple CPU setting of PLC CPU (CPU No.1) does not match that of Motion CPU.
(1) Check if the multiple CPU setting of the Multiple CPU setting parameter and the system setting match those of the PLC CPU (CPU No.1).
(2) Check if the control CPU settings of the PLC CPU (CPU No.1) in the I/O allocation settings matches those of the Motion CPU in the system configuration.