I got bored and decided to do some recreational PLC coding and decided to write a Tic Tac Toe program in ladder logic.
To make the problem more challenging I decided to attempt to write the code without using custom functions, just 100% ladder logic.
This is where I got into some issues with the [ILock] and [ILoff] functions. Turns out that they are not broken, but I was transfixed by the example in section 9.3.5. of the TL6ReferenceManual.
[ILock] and [ILoff] turned out to not be very useful for my purposes, but I'd like to know how to program the "Equivalent Circuit". I have tried everything, but I can't build this circuit with i-TRiLOGI 6 or 7.
Best regards,
Gary D*ckinson