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Ladder Diagram Example

OR Gate Example


The ORP rising edge (one-shot) contact orientation performs a boolean OR operation based on the ON status of the assigned BOOL data register, S, for only 1 scan.

Ladder Diagram Example


When the rising edge (one-shot) contact, M95.3, is powered OFF OR the rising edge (one-shot) contact, M33.1, is powered OFF, the coil, Y10.2, is deenergized.


When the rising edge (one-shot) contact, M95.3, is powered ON, the coil, Y10.2, is energized for only 1 scan.



Or when the rising edge (one-shot) contact, M33.1, is powered ON, the coil, Y10.2, is energized for only 1 scan.



If both rising edge (one-shot) contacts, M95.3 and M33.1, are powered ON, the coil, Y10.2, is energized for only 1 scan.



The rising edge (one-shot) contacts, M95.3 and M33.1, will remain ON (unless otherwise specified), but the coil, Y10.2, is deenergized after 1 scan.

Scan Execution Time

Since scan programs execute in less than a second, it might not appear that the coil, Y10.2, was energized.