Posted 15 Aug 2019 Hi! im trying to learn plc programming and making a reptile tank climate control as a hobby project. i am looking into a FX1N-24MR. so what i want to do is one warmer zone that will be controled with a temp (pt100 maybe) and this temperature will be hold untill 22:00 and then start again at 06:00. there is some more functions to add but my main problem is a sequence that i want to be turned on once an hour for 1 second if a humidity sensor not giving to high humitidy. this will open a magnetic valve (or just energize the coil i mean) to let som water from a tank out and evaporate. and this should continue i a constant loop untill i manually shut it off again. so my question is, is this possible with the plc model and can i make multiple sequenses that run at the same time but are completely independent from each other? like the temp control and the humidity? // Mikael Share this post Link to post Share on other sites
Posted 15 Aug 2019 It's quite possible with that plc but you will need an extra add on unit. An analogue to digital converter. Share this post Link to post Share on other sites
Posted 21 Aug 2019 If I get you right first of all is the humidity sensor analogue if so you will need a card for the sensor i.e. 4-20ma & a second card for the PT100 however if you use a PT100 to 4-20ma converter you only need one card either a 2 or 4 way analogue card. Depending on the cards you use you will need to scale the values into meaningful values i.e. 0-100 Deg C & 0-100% humidity (Note: THe PT100 Card is scaled at 0.1 Degree unless set within the program. The plc does have a real time clock that will be set to your PC current time when you download the PLC Parameters these Start at D8013 registers You can compare the temp/humidity with set values & turn on what you need based on set times/parameters. Share this post Link to post Share on other sites