Why is the piston moving in the wrong direction?

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Hassan 2014-5-16

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https://ww2.mathworks.cn/matlabcentral/answers/129871-why-is-the-piston-moving-in-the-wrong-direction

I've just started to work in simulink and this might be very easy to answer for someone with a little more experience than me. I've tried to make a hydraulic scheme using simhydarulic to see how things work but the system do not behave as expected. I will attach a figure here so you could see how the scheme looks like. An external force is applied on the rod of the hydraulic cylinder so I would expect the piston to move in the negative direction. However that is not the result I obtain on the scope which shows an increasing rod extension. Maybe there is something wrong in the way I connect the components to each other?

I hope my question is clear and I would be very thankful for any help.

Thank you

/Hassan