LTON
The function block LTON is a timer on delay with a 64-bit time data type (LTIME).
Inputs
VAR_INPUT
IN : BOOL; (*starts imter with rising edge, resets timer with falling edge*)
PT : LTIME; (*time to pass before Q is set.*)
END_VARName | Type | Description |
|---|---|---|
IN | BOOL | Starts the timer with a rising edge and resets the timer with a falling edge. |
PT | TIME | Time elapsed before Q is set. |
Outputs
VAR_OUTPUT
Q : BOOL; (*is TRUE, PT seconds after IN had a rising edge*)
ET : LTIME (*elapsed time since rising edge at IN*)
END_VARName | Type | Description |
|---|---|---|
Q | BOOL | Q has a rising edge when the time specified in PT in nanoseconds has elapsed. |
ET | LTIME | If IN = FALSE, the outputs are FALSE or 0. As soon as IN = TRUE, the time in ET is incremented in nanoseconds until the value reaches PT, then it remains constant. Q is TRUE, if IN = TRUE and ET = PT. Otherwise Q = FALSE. |
Graph showing LTON over time:
Requirements
Development environment | Target platform | PLC library to include |
|---|---|---|
TwinCAT v3.0.0 | PC or CX (x86) | Tc2_Standard |