Method and system for moving intelligent algorithm of upper computer down to PLC and PLC device

The invention discloses a method and system for moving intelligent algorithm of upper computer down to PLC and PLC device. The method includes such steps: the step of moving data downward: convertingdata format required by intelligent algorithm to data storage format of PLC device according to encoding rule, packaging the converted data into required data packets, and sending the required data packets to user data storage module of PLC device for storage; the step of moving The algorithm downward: editing the intelligent algorithm into ladder diagram through ladder diagram program by the PLCdevice, and encapsulating the ladder diagram into algorithm function module. The method can be executed independently in PLC device, which is safe, stable and reliable. The data needed for the intelligent algorithm running need not be stored in the host computer, and the data packets stored in the host computer are directly called, so that the PLC device can independently execute the correspondingintelligent algorithm, whi