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			 Skimmer Control (12 hrs pause) by Programmable Logic Skimmer Control (12 hrs pause) by Programmable Logic
			
				
					Hello,
 Could anyone please help me to set up a programmable logic function for my skimmer?
 What I’m intending is as follows.
 When I feed coral food and hit feed pause 1 (FP1) at around 23:00, the skimmer stops until I hit feed pause 2 (FP2) next morning,
 or a timer gives a reset signal around 11:00. (for about 10~12hours).
 This is for preventing the skimmer from overflow or the coral food is stripped by the skimmer too early.
 
 I tried to write a programmable logic as follows.
 G1 : Or (PL1)
 Input 1 : FP2
 Input 2 : Timer 1
 
 G2 : SR-flipflop (PL2)
 Input 1 (set) : FP1
 Input 2 (reset) PL1
 
 Timer 1 (Process)
 Event start at 11:00
 
 Power Outlet 5
 PL2
 Invert
 
 This programmable logic does not work, so I tried to add a pulse (1s) after FP1 and FP2 before the input of their next gate, but nothing changed.
 I tried with Maintenance Mode, but the duration is too short, 5 hours?
 I fully understand the functions of those logic gates by my background, but I’m a very beginner for the PL of P4.
 What did I do wrong?
 Could you please give me a tip to achieve the function?
 Thanks in advance.
 
 Son
 
 
 
				
					Last edited by otimer; 05.08.2019 at 07:23.
				
				
			 
 
 
 
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					Hello,
 Due to no answer so far, I have achieved the function by myself thru testing the function (settings options and status of output) of each event and gate.
 The following is the actual programmable logic that I made.
 
 1. Extra > Feed Pause > check filter off 1 & 2 and set 1 min. both
 
 2. Programmable Logic
 Gate G1 : NOT PL1
 Input 1 : Filter 1
 
 Gate G2 : NOT PL2
 Input 1 : Filter 2
 
 Gate G3 OR  PL3
 Input 1 : PL2
 Input 2 : Timer 1
 
 Gate G4 SRflipFlop  PL4 <--- added
 Input 1 : PL1
 Input 2 : PL3
 
 Timer (Process)
 Timer 1 : Event start at 11:00
 
 Switch Channel 5
 Function : PL4
 Invert
 
 This programmable logic works as follows.
 Whenever I feed coral food (in my case, Prodibio Reef Booster) at around 23:00~24:00,
 I hit also Feed Pause 1 to pause my skimmer for about 12 hours. Next morning, I hit Feed Pause 2 to restart the skimmer.
 Even if I forget to hit Feed Pause 2, the timer gives restart signal at set time (ex 11:00).
 I hope this helps reefers need a similar function.
 
 Son
 
 
 
				
					Last edited by otimer; 08.08.2019 at 06:58.
				
				
			 
 
 
 
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					Good job, thanks for posting the follow up. This could be useful for me in the future.
				 
 
 
 
 
 
 
	
	
	
	
	
	
	
	
	
	
	
	
		
		
		
		
			
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