use of timer for simulating voltage regulator

Hello everybody! I need to simulate a voltage regulator: in this system voltage has to be regulated if it's out of tolerance for more than 30 seconds. If voltage returns to the correct range the timer has to be stopped. I wrote this code

function simulation
% parameters
Vnom =      3850;    
s =         0.01;         
delay =     30;       
g =         50;           
n =         1000;           
Vmin =      Vnom*(1-s);
Vmax =      Vnom*(1+s);

V = xlsread('data.xls', 1, 'C2:C1002');      %import data from Excel

t = timer('Period', delay, 'TimerFcn', calculate(V, g, n, Vmin, Vmax));

function  calculate
for i=1:n
   if V(i) < Vmin
       start(t);
       if "30 seconds are passed"
            V(i) = V(i)+ g;
       end

   elseif V(i) > Vmax
       start(t);
       if "30 seconds are passed"
            V(i) = V(i)- g;    
       end

   elseif (V(i) >= Vmin && V(i) <= Vmax)
       stop(t);
   end    
end 

xlswrite('data.xls', V, 1, 'E2:E1002');

Problems:

1)Error message ("Too many input arguments") in this line t = timer('Period', delay, 'TimerFcn', calculate(V, g, n, Vmin, Vmax))

2)How can I express in matlab code the fact that "30 seconds are passed"?

Answer 1

[Sabin]

This has been answered:

https://www.mathworks.com/matlabcentral/answers/69690-error-using-timerfcn-too-many-input-arguments?s_tid=prof_contriblnk