Topic: DMD0044
(CONTACT) - Trailing Edge Powerflow Modifier (ANDNDPF)
The Trailing Edge Powerflow Modifier contact will allow power flow for one complete PLC scan when the input power flow transitions from ON to OFF.
Hotkey: Ctrl-F3
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 Trailing Edge Powerflow Modifier contact is allowed.
The ladder logic below shows two examples where a Leading Edge Powerflow Modifier contact on a sub-rung is NOT allowed.
Parameters:
This instruction has no parameters.
Status Display:
There is no status to display.
See Also:
(CONTACT) - Leading Edge Powerflow Modifier (ANDPDPF)
(CONTACT) - Trailing Edge Powerflow Modifier (ANDNDPF)
(CONTACT) - Invert Powerflow (NOT)
Related Topics:
(CONTACT) - Normally Closed (STRN / ANDN / ORN)
(CONTACT) - Normally Open (STR / AND / OR)
(CONTACT) - Negative Differential (One-shot Falling) (STRND / ANDND / ORND)
(CONTACT) - Positive Differential (One-shot Rising) (STRPD / ANDPD / ORPD)
(CONTACT) - if Equal (STRE / ANDE / ORE)
(CONTACT) - if Not Equal (STRNE / ANDNE / ORNE)
(CONTACT) - if Greater Than (STRGT / ANDGT / ORGT)
(CONTACT) - if Greater Than or Equal (STRGE / ANDGE / ORGE)
(CONTACT) - if Less Than (STRLT / ANDLT / ORLT)
(CONTACT) - if Less Than or Equal (STRLE / ANDLE / ORLE)
Rung Example:
