In Abaqus explicit, in order to apply 1mm/min displacement, I did the following steps,

I put Total time in step section as 60

and displacement(U2) magnitude section I put 1/60 or 0.1666666667 and in the tabular section

time= 0:1:60 and amplitude = 0:1:60

I will be thankful, if anyone kindly confirms me that it's a correct way to do it, or if I made a mistake please give me the proper direction, thanks in advance.