Solving option for tabulated parameters

Hi,

I have problem in launching a series of parametric study.

For example, 

my whole simulation total time is 10s, however, my current source to the solid conductor when to switch of at the time of 3s.

which mean I define my current source as a tabulated values.

let say I want to solve this with multiple current stage at once such as which 500A, 400A, 300A and 200A.

How am I able to control that in the solving scenario as it only allow for single reference value instead of a table of values.

Best,

Jerome.