Topic: DMD0066

PD - Leading Edge One-Shot

When the input logic generates an OFF to ON transition, the Leading Edge One-Shot (PD) instruction will turn ON the specified discrete location for one complete controller scan.

Note: use the Leading Edge Powerflow Modifier to generate a single one-shot event for multiple output instructions without requiring the use of a bit memory location.

Parameters:

Note: Use the F9 key (Element Browser) or Down-Arrow key (Auto-Complete) at any time to see a complete list of the memory locations that are valid in the current field of the instruction.

Pulse - designates the bit memory location to use. This can be any writable bit location.

Inputs:

The standard Leading Edge One-Shot (PD) has one ladder logic input. The gray triangle at the right end of an input leg indicates this input is edge-triggered, meaning that each time this input logic transitions from OFF to ON, the Pulse bit location will be ON for one complete controller scan.

See Also:

• ND - Trailing Edge One Shot

• PD - Leading Edge One Shot

Related Topics:

• STRPD - Store Positive Differential Contact

• STRND - Store Negative Differentia Contact
   

• Trailing Edge Powerflow Modifier

• Leading Edge Powerflow Modifier

Example: