You have to create a function in time. In this function, define the x-axis as your time of cycling and y-axis as the value of loads.   

Hi

I advice you to see these documents. You will find what you need.

I hope that I helped you, let us know if you have another questions or you need more details.

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https://support.tnodiana.com/manuals/d944/ConcMas/node115.html

http://tnodiana.com/content/cyclic-loading-please

I have applied cyclic loading as a base function command (displacement varying with time). I did nonlinear analysis, so i used time steps. But after analysis, the displacement is not showing to and fro motion. I have attached the pictures for reference

hi I am also facing the same problem