inside cubicle that containe the IO card and the CPU) =30°c and the Delta T=15°C.Now the PLC is functionning in an environnement that the external T° is variable that is to say in a day the external T° can vary from 22° to 28°C and same time it reach 34°C. the Internal T° ( T° inside cubicle that contains the I/O cardPLC)1- I need to found out if the type of the variation of temperature ( internal and external) as described above should be taken into account in the life profil?2- In this case, how can I use FIDES model or how to define the life profil knowing that there is more than 1 delta T°( so that delta T ( external cubicle) = can be > = 2°C, 3°C... in a day I can have delta T 1 = 3° , delta T 2 , 4°C ....etc)Delta T ( internal cubicle) = can be > = 2°C,4°C, 6°C...etc)each delta T can last 1 hours n same times 2 hours , it is very variable. Thank you in adavance for your help
