PLC Program Documentation That Survives a Night Call
Tag naming, rung comments, UDT and AOI descriptions, pass-through and L5X exports that keep a Studio 5000 or TIA Portal project readable years later.
Limit Switch
PLC Bit Instructions XIO and XIC ladder examples
Explains when to use the XIC and XIO bit instructions for start, stop, and limit switch inputs, with a motor start-stop ladder example.
Siemens PLC Programming Example Rail Travels Between Points
Siemens PLC programming example that reverses a motor to move a rail cart between two limit switches, with immediate and delayed stop logic.
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