Topic: DMD0046
(CONTACT) - Leading Edge Powerflow Modifier
The Leading Edge Powerflow Modifier contact will allow power flow for one complete PLC scan when the input power flow transitions from OFF to ON.
Powerflow Modifier instructions are only allowed to be placed on a rung in a location where the ladder logic for that rung could be complete, in other words, any place on the rung where an OUT coil could be placed.
The ladder logic below shows where a Leading Edge Powerflow Modifier contact is allowed.
The ladder logic to the right shows two examples where a Leading Edge Powerflow Modifier contact on a sub-rung is not allowed.
Hotkey: Ctrl-F2
Mnemonic (seen in Import, Export, Find, and Program Compare): ANDPDPF
Parameters:
Note: Use the F9 key or click the 'three dot box' at the right edge of the parameter field to open the Default Element Selection Tool (the Element Picker or the Element Browser) or use the Down-Arrow key (Auto-Complete) on any parameter field to see a complete list of the memory locations that are valid for that parameter of the instruction.
This instruction has no parameters.
Status Display:
There is no status to display.
See Also:
(CONTACT) - Leading Edge Powerflow Modifier
(CONTACT) - Trailing Edge Powerflow Modifier
Related Topics:
(CONTACT) - Negative Differential (One-shot Falling)
(CONTACT) - Positive Differential (One-shot Rising)
Relational (CONTACT) - If Equal
(Relational CONTACT) - If Not Equal
(Relational CONTACT) - If Greater Than
(Relational CONTACT) - If Greater Than or Equal
(Relational CONTACT) - If Less Than
(Relational CONTACT) - If Less Than or Equal
Rung Example:
