TIMER – Multipurpose timer

Block SymbolLicensing group: STANDARD

Function Description
The TIMER block either generates an output pulse of the given width pt (in seconds) or filters narrow pulses in the U input signal whose width is less than pt seconds. The operation mode is determined by the mode parameter. Supported modes are:

1: Pulse: An output pulse of the length pt is generated upon rising edge at the U input. All input pulses during the generation of the output pulse are ignored.
2: Delayed ON: The input signal U is copied to the Q output, but the start of the pulse is delayed by pt seconds. Any pulse shorter than pt is does not pass through the block.
3: Delayed OFF: The input signal U is copied to the Q output, but the end of the pulse is delayed by pt seconds. If the break between two pulses is shorter than pt, the output remains on for the whole time.
4: Delayed change: The Q output is set to the value of the U input no sooner than the input remains unchanged for pt seconds.

The graph illustrates the behaviour of the block in individual modes for $pt = 3$ :

The timer can be paused by the HLD input. The R1 input resets the timer. The reset signal overpowers the U input, similarly to the RS block.

This block propagates the signal quality. More information can be found in the 1.4 section.

Input

U	Trigger of the timer	Bool
HLD	Timer hold	Bool
R1	Timer reset	Bool

Parameter

mode	Timer mode $⊙$ 1	Long (I32)
	1 .... Pulse generator 2 .... Delayed ON 3 .... Delayed OFF 4 .... Delayed change
pt	Timer interval [s] $⊙$ 1.0	Double (F64)

Output

Q	Timer output	Bool
et	Elapsed time [s]	Double (F64)
rt	Remaining time [s]	Double (F64)

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