Steady state is detected by abaqus when a certain norm (you can choose force, torque, plastic equivalent strain) defined on a user defined set of elements (ELSET) does not change much from step to step.
In a rolling process you usually assume completely rigid roller, then using Abaqus/Explicit you make an analysis in which a meshed piece of material is pushed against the roller. When a steady shape is reached, a steady state will be detected.
I have read abaqus documentation, the problem what i am facing is follows: ABAQUS documentation mention that we can give steady state detection only in input file, but i have not seen any explanation about giving in CAE file. I am familiar with working in CAE rather than in input file.