I am looking for a “Delay on Make Timer” NODE. This is a common device used in HVAC industry. When a call for AC is initiated from the thermostat the timer then begins timing but does not turn on the AC. Once the delay time period has expired the timer then closes and remains ON or “True” and the AC comes on and runs until the call from the thermostat has ended. The delay ON allows for compressor protection.
I want to mix a batch of solution for my hydroponics system. When I begin I want to add water and run the dosing pump for part A for 75 seconds. Once 75 seconds have expired I want to turn on Part B dosing pump for another 75 seconds. After that turn ON Dosing pump for my Ph adjustment for 11 seconds. Finally the water is turned off by a float switch.
If I use two xod/core/delay nodes with a NOT node between I can get it to work like I want it. HOWEVER upon power up the NOT node sends a TRUE and turns on the pump for 75 seconds. This is not good as it causes the solution to be inaccurate.
In short I need a DELAY ON node that will allow time to pass once the input pin is TRUE before making the output pin TRUE, and will remain TRUE until the input pin is FALSE, which instantly makes the output pin FALSE. And of naturally the T pin is adjustable.
Thanks for your help