Why Relay reads your PLC logic better than ChatGPT
A user was building cylinder-control logic in Studio. A cylinder is a piston that extends and retracts; a limit switch is a small sensor at the end of its travel that turns on once the cylinder gets there. His program kept raising an extending-timeout fault — after he gave the extend command, the logic waited for that "I've arrived" signal, never got it, and assumed the cylinder had jammed. The only way to clear the fault was to switch the limit switch on by hand in the simulator. He couldn't understand why he had to fake a signal like that.
