In System Administration select Access Control > Access Panels... Then select the LNL-500 from the main tabs.
Then in the sub tabs select Options and make sure Elevator Support is checked. You will now be notified that a download will be required. The system will automatically download the changes to the ISC/LNL-500.
Set up reader #1 on the 1320, and check Elevator Reader. This step is in System Administration under Access Control > Readers...
Then in Access Control > Access Levels... Select the Elevator Control tab. Create an elevator control access level. This basically ties an ouput from the 1320 to a floor, and assigns a timezone to it.
Then in Access Control > Access Levels... select Access Levels tab. Assign the elevator control level to the elevator reader.