[aRoach]

Make a new variable:

pawn Код:

new bool:IsBankRobbed;

Make a new timer:

pawn Код:

forward Check_IsBankRobbed();
public Check_IsBankRobbed()
{
    if(IsBankRobbed) IsBankRobbed = false;

    return 1;
}

Put it in the /robbank command, add this:

pawn Код:

IsBankRobbed = true;
SetTimer("Check_IsBankRobbed", 3600 * 1000, false);

Good Luck!