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:

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.
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.
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.
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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