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The FBD/LD/IL > Edge Detection command is used in FBD or LD to insert an edge detection element at a boolean input. This corresponds to inserting an R_TRIG function block for detecting a rising edge (FALSE -> TRUE) or an F_TRIG function block for detecting a falling edge (TRUE -> FALSE).
When the command is performed repeatedly at the same insert position, the inserted element will toggle between rising edge detection, falling edge detection and none.
Example: edge detection at SEL operator
In this example, an edge detection element has been inserted when the first input (b1) of the SEL box was selected. The SEL operator will have output 1 each time a rising edge is detected at its input.
The command is not available in the IL editor. A network containing an edge detection will be kept unmodified after conversion from FBD/LD to IL.
NOTE: Concerning the view options for the components of FBD, LD and IL networks, consider the FBD, LD and IL editor options.
