Logic Solver Negative Edge Trigger function block

The LSNDE function block generates a True (1) discrete output when the discrete input makes a negative (True-to-False) transition since the last execution of the block. If there has been no transition, the discrete output of the block is False (0).

The LSNDE function block supports signal status propagation. There are no modes or alarm detection in the block.

Figure: LSNDE Function Block

IN_D is the discrete input value and status.

OUT_D is the discrete output value and status.

The following figure shows the internal components of the LSNDE function block:

Figure: LSNDE Function Block Schematic Diagram