CCS/DRV8303: Question about Acceleration parameter of InstaSpin

Hello,

I would like to ask a question about Acceleration parameter of InstaSpin.

Now we are using InstaSpin lab 5b,on our custom board, that includes DRV8303 and TMS320F28027.

And, we would like to raise the parameter "MaxAccel_krpmps",
and, if we set the MaxAccel_krpmps so high, when start to drive the motor, DRV8303 fault (FETHA_OC etc.)
occures.
( We set the OC_ADJ_SET value of DRV8303 as the maximum current of the circuit.)

So, now we set the  MaxAccel_krpmps as low value than we expect.

I would like to ask two questions.

1.
The maximum limit of the parameter  MaxAccel_krpmps would be calculated by the motor parameter (Rs,Ls) etc. ?
I wonder if the MaxAccel_krpmps value we expect is unreasonable or not...

2.
If we change some parameter value on user.h, we could increase the MaxAccel_krpmps value ?

Hiroyasu