In the software PT drop-down menu, select System Settings - Initial Value, assign the addresses of $SB and $SW to the internal address of plc: DM100 and DM150, then the first address of $SW DM150 is used to store the NS screen number. The DM150 value can be directly modified in the PLC, that is, the screen number of the NS can be modified to achieve the function of switching screens.
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