PID Controller Problem

I don’t know why….
If a set the SV temperature it takes a very long time reach the PV temperature and it stops. For example, if I set SV into 250 degrees the PV will stay at 200 deg for ever.
I don’t know what’s the problem is it the electrical circuits or the PID controller settings. Please help me 🙁

I don’t know why it stays at 200*C even if I set it to 230*C…until it goes down to 190*C 😭
PLEASE HELP ME….how to Fix this…