EUCHNER MSC - 9.4. Function blocks in the OPERATOR window; 9.4.1. Logical operators; 9.4.1.1. AND; 9.4.1.2. NAND

English
If not selected, the logic is reversed, i.e. the output is set to "0" (FALSE) by a falling edge
on the input signal and remains in this state for the time set. This state can be extended
as long as the input remains at "0" (FALSE).
In
Out
T T T
Retriggerable: If selected, the time is reset on each status change on the input.