====== TND ======

TND is a conditional exit command. TND is typically used to abort a ladder
scan.

{{ :cubloc:tnd:tnd.png?nolink |}}

In the ladder above, when P0 turns ON the ladder scan will be aborted.

{{ :cubloc:tnd:tnd2.png?nolink |}}

It can also be used to exit from subroutines when a certain condition is met.
In the ladder above, when P1 turns ON, the subroutine will be aborted, but
the ladder scan will continue.



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