Max pin codes and Keypad out put formats for AD400 AD300 locks

There are two general categories of keypad output formats, buffered and non-buffered. For buffered outputs the AD400/AD300 will collect several key presses and once it has received a certain number it will send them to the ACP as a complete PIN. The number of keys it will buffer before considering the PIN complete is based on a configuration that can be made by the SUS (or ACP if it supports changing that Config). In the SUS this can be found on the “Reader” tab and is called “Keys Buffered” and can range from 1-11. So the practical limit is 11.

For non-buffered keypad output formats the  AD400/AD300 will send each key as it is pressed (so one at a time) indefinitely. So there is no upper limit that  AD400/AD300 will place on the number of key presses it will send to the ACP, but again these keys are sent one at a time. However, that same keys buffered setting is used to determine the max length of a PIN to cache and should the lock be operating offline in cache mode it would assume a complete PIN to be no longer than this configuration detail. So if a user was looking to use cache mode it would be best to use PINs that are not longer than 11 since that is the max setting the SUS will let you configure. 

How do Keypad formats work.  The 12 modes are in place to accommodate various ACP needs for data bit length a 4 or 8 bit can be selected this will send the same data but with padding.