Parameter updating method and system, and data interaction method and system

Abstract

The present application relates to a parameter updating method and system, and a data interaction method and system. The parameter updating method is used for updating parameters of devices in a system comprising multiple HMIs and multiple PLCs; and the system comprises: a primary device comprising a primary HMI and a primary PLC which are connected to each other, and secondary devices each comprising a secondary HMI and a secondary PLC which are connected to each other. The parameter updating method comprises: establishing connections between the primary HMI and the secondary HMIs and between the primary PLC and the secondary PLCs, wherein there is no connection between the primary HMI and the secondary PLCs and between the primary PLC and the secondary HMIs; and establishing PLC connections between the primary PLC and the secondary PLCs to transmit parameter data and a parameter updating command.

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