Serial communication between MEGA 2560 and Simulink and the signal

Hello,

I connected Loadcell and Loadcell amplifier(hx711) from Sparkfun to Mega 2560. And then, I made scope to see how it works. The result was unreadable and very different than what I expected.

However, when I tried it on matlab, I could get the same result as on Arduino and also plot it. But, why I cannot see the same result on Simulink?

What I assumed is that the scope block just read and show current values of the load cell. How can I adjust this to be readable? I attached some pictures.

Best,

The values which over 48 are when I gave compression or tension on the load cell. Can I solve it to add some blocks, or make my own op-amp?