With the continuous advancement of industrial automation,the application of automatic control technology is becoming increasingly widespread.In order to achieve fast reading and calling of batch analog instrument data by the upper computer operating system,this article focuses on the Siemens TP1200 intelligent panel and proposes an instrument calling technology based on UDT and multiplexing for the control method of analog instruments.It provides a program design idea for analog instrument calling.The article explains the design process of analog instrument control program and upper computer operation interface,simplifies the redundant and complex correlation steps between PLC variables and HMI variables,and conducts simulation analysis on the working process of analog instruments in the upper computer interface,ultimately achieving flexible calling of multiple sets of analog instruments.
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