Lindy Carbon Monoxide Alarm user manual Feedback Inputs, Previous Feedback Input, Ilter

4

4.9.5

OOPERATIONPERATION

FEEDBACK INPUTS

To realise complex filter conditi- ons, each filter has two feedback inputs where filter events can be further processed.

The special feature here is the possibility of delay (delay time), conditional evaluation (pass condition) and hold time.

	[-] Previous Feedback Input		[E] EFFECT
	Selection pointer to previous input.		State how the input acts on
	[+] NEXT FEEDBACK INPUT		the OR element.
			thru	switched through
	Selection pointer to next input.
F1: Filter 1			off	switched off
	[F] FILTER
F2: Feedback input of filter 2.	Origin of the feedback.		invert	switched through
				in inverted fashion
f1: F1 output event, input event	[D] DELAY TIME
			[?] HELP
of F2	Set the delay time after the		Explanation of the menu
f2: Output of the feedback input	operation of the input event f1 in s.		items.
of F2	[H] HOLD TIME
	Set the hold time of f2 after the		[Q] QUIT
	release of f1 in s.		Jump back to the previous
	[P] PASS CONDITION		menu.
	Set the pass mode.
	thru	pass
	conditional	pass if input condi-
		tion is still met

With a pass condition = thru, the effective hold time of f2 can

be extended by any time by sub- sequent events of f1 (retriggering).

f2 in this case is not released

until thold after the last falling edge of f1.

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