varplus 12 change it's setting parameters after period

[Youssef-asec]

hi,

I have a problem in varplus 12 controller 

i have 8 steps , first 6 is 50 kvar and last two is 25 KVAR 

after i set each step size from 402 parameter 

after period these sizes change automatic to another values 

for example 50 kvar become 40.8 kvar so after period i have spl alarm 

and in parameter 403 i put all steps to automatic 

but after some period some of steps become off???

and  parameter 308 (step recognition is off) 

so anyone can help please ?