Pulse Rising Edge Contact

Pulse rising edge (positive) contacts enable a Boolean operation between a connection line state and the rising edge of a Boolean variable.
fbd_prect1
Left Connection
Right Connection
The state of the connection line on the right of the contact is set to TRUE when the state of the connection line on the left is TRUE, and the state of the associated variable rises from FALSE to TRUE. The state is reset to FALSE in all other cases.
Example
ldr_prect2
(* ST Equivalence: *)
output1 := input1 AND (input2 AND NOT (input2prev));

(* input2prev is the value of input2 at the previous cycle *)
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