Issues regarding buttons in WinCC configuration
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I have just started working with Siemens PLCs and WinCC configuration software, and I would like to ask fellow users: what symbols are used in ladder diagrams to represent buttons such as “Start,” “Stop,” “Auto,” and “Manual” on the HMI interface? Just as we use I0.0 for external inputs and Q0.0 for outputs, what is used to represent the configuration buttons? I have only worked with simple, configuration-free programs using the S7-200 before; I hope those with more experience can share their knowledge with me. Thank you very much
Siemens 300/400 generally uses the M memory area to create intermediate variable points, similar to the V memory area in 200. In WINCC’s configuration interface, you can find this point in the dynamic linking of buttons, and the PLC address corresponding to this point can be seen in the communication variables.
Create an intermediate variable; simply reference this variable in the program
In WinCC configuration, buttons are used to reference this variable; in PLC ladder logic configuration, the variable is utilized to control the on/off states