Hello!
So my program is suppose to run an enviromental chamber through rs485 serial to usb converter. it should ramp to 25 C then go to -40 C and hold for 30mins, next it ramps to 90 c and holds for 30 mins. It should go through these cycles 200 times and end. right now it goes all the way to 90 and holds fine, but instead of ramping back to -40c it tres to ramp to 90 and hold continuosly. Can anyone help? program below.
