需求
“A motor start-stop seal-in rung with a start button and motor auxiliary contact in parallel, a normally closed stop button, and a motor command output coil.”
接著試試Add an overload contact.Change the output to a pump command.
Classic three-wire motor start/stop seal-in circuit in IEC 61131-3 ladder logic — the foundational pattern taught in every PLC certification course.
“A motor start-stop seal-in rung with a start button and motor auxiliary contact in parallel, a normally closed stop button, and a motor command output coil.”