DIFU PLC Omron :
DIFU(13) - Differentiate Up.
DIFU(13) turns ON the designated bit (B) for one scan on reception of the leading (rising) edge of the input signal.
B: --- Bit --- IO, AR, HR, LR.
PLS PLC Mitsubishi :
PLS is Pulse
When PLS instruction is executed, object devices Y and M operate for one operation cycle after the drive input signal has turned ON.
DIFU PLC Keyence :
DIFU is Diff up or Differentiate Up
Scans the target relay once (up differential) at the up edge of the previous state.
See : Simulator DIFU PLC or PLS PLC