Control of cooler and Calciumreaktor

Hi

I have
PLC 3ex
2 of 6PAB socketlist
2 pH-probe
1 Temp-probe


I whant to control some sockets by the temp. Normal value 27C
Turn off my MH light and UVC If the temp is >28C and the MH and UVC is controled by Illumination 1 and 2. And switch on the ciller.

What number do I need to set in the tempsensors setttings?

I want to control my CO2 solinoid to the calciumreaktor and the pH in the tank and it will only open when the MH-lamps is on (daytime). The soluition I have now it open the solinoid at the right value byt it don´t turn of by the lower limit.

I have scaned the forum byt haven´t find and right solution.

/Johan

set normal (nominal) temp. to 27°C
adjust temp. dep. light red. : shut off limit 1°C

pH:
use the "nocturnal change" - at night you set a higher normal value, then the CO2 solendoi will not switch at night