LTP
The function block LTP is a pulse generator with 64-bit time data type (LTIME). This function block can be used to generate pulses with a defined pulse duration.
Inputs
VAR_INPUT
IN : BOOL; (*Trigger for Start of the Signal*)
PT : LTIME; (*The length of the High- Signal*)
END_VARName | Type | Description |
|---|---|---|
IN | BOOL | Trigger for the start of the signal |
PT | LTIME | The length of the High signal in ms |
Outputs
VAR_OUTPUT
Q : BOOL; (*The pulse*)
ET : LTIME (*elapsed time since pulse start*)
END_VARName | Type | Description |
|---|---|---|
Q | BOOL | Q supplies a signal over the interval specified in PT. |
ET | LTIME | If IN = FALSE, the outputs are FALSE or 0. As soon as IN = TRUE, Q = TRUE and remains TRUE for the pulse duration PT. As long as Q = TRUE, the time in ET is incremented in nanoseconds until the value reaches PT, then it remains constant. The output Q remains TRUE until the pulse duration has elapsed, irrespective of the state of the input IN. |
Graph showing LTP over time:
Requirements
Development environment | Target platform | PLC library to include |
|---|---|---|
TwinCAT v3.0.0 | PC or CX (x86) | Tc2_Standard |