Acceleration value on TMCM6214

I am using TMCL-IDE 3.6.0.0 to control TMCM-6214 V2.0.   I've realized that the Acceleration value cannot be any numbers at the Position mode window . That number must be like 117, 223, 350 ,,,,,9896,,,19908,,,99885,,,,.   Is there any equation for these numbers?   I have to convert from user input acceleration value [mm/sec^] to [pps^2].

Thanks,