We have a group of the first generation of the 411.(supposed to take the black tool and not the blue tool). The cars were set up for security at one floor after hours. You use the car call buttons to enter the code.You did not need a code during normal business hours. The customer needed the code changed, we changed it to the code they wanted, but now you can either have the code enabled or disabled. We do not see how the timer changes the lock out. We have the TIP document 3.6.01. Looking for some help.